Jet J-A3816 Service manual

Operating Instructions and Parts Manual
15-inch Vari-Speed Drill Press
Models: J-A3816, J-A5816, J- A5818
Model J-A3816 Model J-A5816
For models with serial no. 11110696 and higher
WALTER MEIER (Manufacturing), Inc.
427 New Sanford Road
LaVergne, Tennessee 37086 Part No. M-354500
Ph.: 800-274-6848 Revision D 11/2013
www.jettools.com Copyright © 2013 Walter Meier (Manufacturing), Inc.

2
Warranty and Service
JET, Wilton and Powermatic warrants every product they sell against manufacturers’ defects. If one of our tools needs service
or repair, please contact Technical Service by calling 1-800-274-6846, 8AM to 5PM CST, Monday through Friday.
Warranty Period
The general warranty lasts for the time period specified in the literature included with your product or on the official JET, Wilton
or Powermatic branded websites.
•JET, Wilton and Powermatic products carry a limited warranty which varies in duration based upon the product. (See
chart below)
•Accessories carry a limited warranty of one year from the date of receipt.
•Consumable items are defined as expendable parts or accessories expected to become inoperable within a
reasonable amount of use and are covered by a 90 day limited warranty against manufacturer’s defects.
Who is Covered
This warranty covers only the initial purchaser of the product from the date of delivery.
What is Covered
This warranty covers any defects in workmanship ormaterials subject to the limitations stated below. This warranty does not
cover failures due directly or indirectly to misuse, abuse, negligence or accidents, normal wear-and-tear, improper repair,
alterations or lack of maintenance.
Warranty Limitations
Woodworking products with a Five Year Warranty that are used for commercial or industrial purposes default to a Two Year
Warranty. Please contact Technical Service at 1-800-274-6846 for further clarification.
How to Get Technical Support
Please contact Technical Service by calling 1-800-274-6846. Please note that you will be asked to provide proof of initial
purchase when calling. If a product requires further inspection, the Technical Service representative will explain and assist
with any additional action needed. JET, Wilton and Powermatic have Authorized Service Centers located throughout the
United States. For the name of an Authorized Service Center in your area call 1-800-274-6846 or use the Service Center
Locator on the JET, Wilton or Powermatic website.
More Information
JET, Wilton and Powermatic are consistently adding new products. For complete, up-to-date product information, check with
your local distributor or visit the JET, Wilton or Powermatic website.
How State Law Applies
This warranty gives you specific legal rights, subject to applicable state law.
Limitations on This Warranty
JET, WILTON AND POWERMATIC LIMIT ALL IMPLIED WARRANTIES TO THE PERIOD OF THE LIMITED WARRANTY
FOR EACH PRODUCT. EXCEPT AS STATED HEREIN, ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE EXCLUDED. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW
LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.
JET, WILTON AND POWERMATIC SHALL IN NO EVENT BE LIABLE FOR DEATH, INJURIES TO PERSONS OR
PROPERTY, OR FOR INCIDENTAL, CONTINGENT, SPECIAL, OR CONSEQUENTIAL DAMAGES ARISING FROM THE
USE OF OUR PRODUCTS. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR
CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU.
JET, Wilton and Powermatic sell through distributors only. The specifications listed in JET, Wilton and Powermatic printed
materials and on official JET, Wilton and Powermatic-branded websites are given as general information and are not binding.
JET, Wilton and Powermatic reserve the right to effect at any time, without prior notice, those alterations to parts, fittings, and
accessory equipment which they may deem necessary for any reason whatsoever. JET®branded products are not sold in
Canada by Walter Meier Manufacturing Americas.
Product Listing with Warranty Period
90 Days – Parts; Consumable items; Light-Duty Air Tools
1 Year – Motors; Machine Accessories; Heavy-Duty Air Tools; Pro-Duty Air Tools
2 Year – Metalworking Machinery; Electric Hoists, Electric Hoist Accessories
5 Year – Woodworking Machinery
Limited Lifetime – Wilton branded products; JET Parallel clamps; Manual Hoists; Manual Hoist Accessories;
Shop Tools; Warehouse & Dock products; Hand Tools
NOTE: JET, Wilton and Powermatic are divisions of Walter Meier Manufacturing Americas. References in this document to
JET, Wilton and/or Powermatic also apply to Walter Meier Manufacturing Americas or any of its successors in interest to the
JET, Wilton and/or Powermatic brands.

3
Table of Contents
Warranty and Service ..........................................................................................................................................2
Table of Contents................................................................................................................................................3
Warnings.............................................................................................................................................................4
Safety Instructions for Drill Presses..................................................................................................................6
ON/OFF Switch Padlock...................................................................................................................................6
Specifications......................................................................................................................................................7
Introduction..........................................................................................................................................................8
Set-up and Assembly...........................................................................................................................................8
Securing the Base............................................................................................................................................8
Assembly.........................................................................................................................................................8
Cleaning..............................................................................................................................................................9
Electrical Connection...........................................................................................................................................9
Operating Controls...............................................................................................................................................9
ON/OFF Switch................................................................................................................................................9
Speed Control Handwheel................................................................................................................................9
Depth Stop..................................................................................................................................................... 10
Operating Precautions.................................................................................................................................... 10
Drilling Recommendations ................................................................................................................................. 10
Maintenance...................................................................................................................................................... 11
Replacement of Drive Belt.............................................................................................................................. 11
Replacement of Motor.................................................................................................................................... 11
Lubrication......................................................................................................................................................... 11
Adjustments....................................................................................................................................................... 12
Table Adjustment........................................................................................................................................... 12
Wiring Diagrams................................................................................................................................................ 12
Electrical............................................................................................................................................................ 13
115 Volt Operation ......................................................................................................................................... 13
230 Volt Operation ......................................................................................................................................... 13
Permanently Connected Tools........................................................................................................................ 13
Grounding Instructions ................................................................................................................................... 14
Extension Cords............................................................................................................................................. 14
Troubleshooting................................................................................................................................................. 15
Parts.................................................................................................................................................................. 15
Parts List - Head Models J-A5816 and J-A5818.............................................................................................. 16
Exploded View — Head Models J-A5816 and J-A5818................................................................................... 18
Parts List - Head Model J-A3816.................................................................................................................... 19
Exploded View — Head Model J-A3816 ......................................................................................................... 21
Parts List – Base Floor Models J-A3816, J-A5816 and J-A5818...................................................................... 22
Exploded View – Base Floor Models J-A3816, J-A5816 and J-A5818............................................................. 23
The specifications in this manual are given as general information and are not binding. Walter Meier
(Manufacturing), Inc., reserves the right to effect, at any time and without prior notice, changes or alterations to
parts, fittings, and accessory equipment deemed necessary for any reason whatsoever.

4
Warnings
1. Read and understand the entire owner's manual before attempting assembly or operation.
2. Read and understand warnings posted on the machine and in this manual. Failure to comply with all of these
warnings may cause serious injury.
3. Replace warning labels if they become obscured or removed.
4. This drill press is designed and intended for use by properly trained and experienced personnel only. If you
are not familiar with the proper and safe operation of a drill press, do not use until proper training and
knowledge have been obtained.
5. Do not use this drill press for other than its intended use. If used for other purposes, Walter Meier
(Manufacturing), Inc., disclaims any real or implied warranty and holds itself harmless from any injury that
may result from that use.
6. Keep guards in place and in working order when the machine is in use. If removed for maintenance purposes,
use extreme caution and replace the guards immediately.
7. Remove adjusting keys and wrenches. Form habit of checking to see that keys and adjusting wrenches are
removed from tool before turning it on.
8. Keep work area clean. Cluttered areas and benches invite accidents.
9. Do not use in dangerous environment. Don't use power tools in damp or wet locations, or expose them to
rain. Keep work area well lighted.
10. Keep children away. All visitors should be kept safe distance from work area.
11. Make workshop kid proof with padlocks, master switches, or by removing starter keys.
12. Don't force tool. It will do the job better and safer at the rate for which it was designed.
13. Use the right tool. Don’t force a tool or attachment to do a job for which it was not designed. The right tool will
do the job better and more safely at the rate for which it was designed.
14. Use proper extension cord. Make sure your extension cord is in good condition. When using an extension
cord, be sure to use one heavy enough to carry the current your product will draw. An undersized cord will
cause a drop in line voltage resulting in loss of power and overheating. Table 1 shows the correct size to use
depending on cord length and nameplate ampere rating. If in doubt, use the next heavier gage. The smaller
the gage number, the heavier the cord.
15. Wear proper apparel. Do not wear loose clothing, gloves, neckties, rings, bracelets, or other jewelry which
may get caught in moving parts. Nonslip footwear is recommended. Wear protective hair covering to contain
long hair.
16. Always use safety glasses. Also use face or dust mask if cutting operation is dusty. Everyday eyeglasses only
have impact resistant lenses, they are NOT safety glasses.
17. Secure work. Make sure the work piece is securely attached or clamped to the table. Never use your hand to
hold the work piece.
18. Don't overreach. Keep proper footing and balance at all times.
19. Maintain tools with care. Keep tools sharp and clean for best and safest performance. Follow instructions for
lubricating and changing accessories.
20. Disconnect tools before servicing; when changing accessories, such as blades, bits, cutters, and the like.
21. Reduce the risk of unintentional starting. Make sure switch is in off position before plugging in.
22. Use recommended accessories. Consult the owner's manual for recommended accessories. The use of
improper accessories may cause risk of injury to persons.
23. Never stand on tool. Serious injury could occur if the tool is tipped or if the cutting tool is unintentionally
contacted.

5
24. Check for damaged parts. Before further use of the tool, a guard or other part that is damaged should be
carefully checked to determine that it will operate properly and perform its intended function - check for
alignment of moving parts, binding of moving parts, breakage of parts, mounting, and any other conditions
that may affect its operation.
25. A guard or other part that is damaged should be properly repaired or replaced.
26. Do not leave tool running unattended. Turn power off. Don't leave tool until it comes to a complete stop.
27. Some dust created by power sanding, sawing, grinding, drilling and other construction activities contain
chemicals known to cause cancer, birth defects or other reproductive harm. Some examples of these
chemicals are:
•Lead from lead based paint.
•Crystalline silica from bricks, cement and other masonry products.
•Arsenic and chromium from chemically treated lumber.
Your risk of exposure varies, depending on how often you do this type of work. To reduce your exposure to
these chemicals: work in a well-ventilated area and work with approved safety equipment, such as face or
dust masks that are specifically designed to filter out microscopic particles.
28. Make certain the switch is in the OFF position before connecting the machine to the power supply.
29. Make certain the machine is properly grounded.
30. Give your work undivided attention. Looking around, carrying on a conversation and “horse-play” are careless
acts that can result in serious injury.
31. The operator should not wear gloves when operating the machine.
32. All doors should be closed, all panels replaced and other safety guards should be in place prior to the
machine being started or operated.
33. Be sure the drill bit is not in contact with the work piece when the motor is started. The motor should be
started and up to full speed before bringing the drill bit into contact with the work piece.
34. Keep your hands away from the drilling area.
35. The drill press must be stopped and the electrical supply must be cut off before any drill bit replacement or
machine adjustment is done, or before any attempt is made to change the drive belts or before any periodic
service or maintenance is performed on the drill press.
36. Remove loose items and unnecessary work pieces from the area before starting the machine.
37. The work piece must be securely clamped before the drill bit comes in contact with the work piece.
38. The drill press must be stopped and the electrical supply cut off or machine unplugged before reaching into
the drilling area.
39. Wear eye protection.
40. Do not remove jammed pieces until motor has stopped.
41. Hold workpiece firmly against table.

6
Safety Instructions for Drill Presses
1. All work shall be secured using either clamps or
a vise to the drill press table. It is unsafe to use
your hands to hold any workpiece being drilled.
2. Drill press head and table shall be securely
locked to the column before operating the drill
press. This must always be checked prior to
starting the machine.
3. Always use the correct tooling. Tooling shall
always be maintained and properly sharpened.
All tooling must be run at the proper speeds and
feeds as they apply to the job. Use only
recommended accessories and follow those
manufacturer’s instructions pertaining to them.
Tooling shall be not be forced in to any
workpiece but fed according to the proper
specifications. Failure to follow these
instructions will not only ruin the tooling as well
as the machine, but can cause serious injury.
4. Never brush away any chips while the machine
is in operation. All clean up should be done
when the machine is stopped.
5. Keep hands in sight. Do not put hands or fingers
around, on, or below any rotating cutting tools.
Leather safety gloves should be used when
handling any sharp objects or cutting tools. See
Figure A.
6. Always wear protective eye wear when
operating, servicing or adjusting machinery.
Eyewear shall be impact resistant, protective
safety glasses with side shields complying with
ANSI Z87.1 specifications. Use of the eye wear
which does not comply with ANSI Z87.1
specifications could result in severe injury from
breakage of eye protection. See Figure B.
7. When drilling in material which causes dust, a
dust mask shall be worn.
8. Avoid contact with coolant, especially guarding
the eyes.
9. Non-slip footwear and safety shoes are
recommended. See Figure C.
10. Wear ear protectors (plugs or muffs) during
extended periods of operation. See Figure D.
A B C D
ON/OFF Switch Padlock
For Model Numbers A5816 and A5818
To avoid accidental starting by young children or
others not qualified to use the tool, the use of a
padlock is required.
1. Open the padlock (Fig E).
2. Insert the through hole in the switch cover.
3. Close the padlock (Fig F).
4. Place the key in a safe place.
Figure E Figure F

7
Specifications
The JET 15-Inch Vari-Speed Drill Presses, Models
J-A3816, J-A5816, and J-A5818 provide drilling
speeds from 400 to 5,000 rpm. Simple handwheel
adjustment sets the speeds with an LED speed
display on the faceplate of the machine.
JET's 15-inch vari-speed drill press provides a solid
base for drilling and offers a wide range of spindle
speeds. The large quill provides greater accuracy.
The large worktable provides the operator with room
to work and ample support for the workpiece. The
drill press has a 3-inch diameter column for head
and table support. The 15-Inch Vari-Speed Drill
Press is equipped with a standard table raiser.
Model J-A3816 J-A5816 J-A5818
Stock Number............................................354500................................354550............................... 354551
Type...................................................Floor Model.........................Floor Model.........................Floor Model
Motor:
Motor Speed (rpm)............................1,725 rpm............................1,725 rpm........................... 1,725 rpm
HP............................................................1 HP................................... 1 HP...................................1 HP
Power Rating...........................1 PH, 115/220V...................1 PH, 115/220V.................. 3 PH, 220/440V
Prewired 115V Prewired 115V Prewired 220V
Spindle speeds (rpm)...................400 to 5,000rpm ................400 to 5,000 rpm.................400 to 5,000 rpm
Capacities:
Cast iron........................................up to 5/8-in. ........................up to 5/8-in...........................up to 5/8-in
Steel..............................................up to 1/2-in..........................up to 1/2-in..........................up to 1/2-in.
Work Table Weight Cpcty....................... 90 lbs..................................90 lbs..................................90 lbs.
Drills to center...............................................15 in....................................15 in................................... 15 in.
Quill diameter...........................................2-1/4 in................................2-1/4 in................................ 2-1/4 in
Quill travel ......................................................6 in......................................6 in..................................... 6 in.
Spindle taper ................................#2 Morse Taper...................#2 Morse Taper.................. #2 Morse Taper
Dimensions:
Table (overall) ..................... 15-1/4 x 17-3/4 in................15-1/4 x 17-3/4 in................15-1/4 x 17-3/4 in.
Table (working area)............ 11-1/4 x 14-1/2 in................12-1/2 x 14-1/2 in................12-1/2 x 14-1/2 in.
Table travel........................................16-3/4 in..............................16-3/4 in............................. 16-3/4 in.
Table T-slots.................................two at 1/2 in.........................two at 1/2 in........................ two at 1/2 in.
T-slot centers.....................................5-5/16 in..............................5-5/16 in............................. 5-5/16 in.
Spindle to table..................................25-3/4 in.............................25-3/4 in.............................25-3/4 in.
Spindle to base..................................44-1/2 in..............................44-1/2 in............................. 44-1/2 in.
Column diameter........................................3 in......................................3 in..................................... 3 in.
Base (LxWxH).............20-7/8x14-3/16x3-1/8 in.......20-7/8x14-3/16x3-1/8 in...... 20-7/8x14-3/16x3-1/8 in.
Base T-slots..................................two at 1/2 in.........................two at 1/2 in........................ two at 1/2 in.
Overall height.........................................67-1/2 in. ............................67-1/2 in............................. 67-1/2 in.
Net weight ...................................................394 lb..................................426 lb................................. 426 lb

8
Introduction
This manual includes operating and
maintenance instructions for the JET 15-Inch
Vari-Speed Drill Presses, Models J-A3816, J-
A5816, and J-A5818. This manual also includes
parts listings and illustrations of replaceable
parts.
Refer to Figure 1 for key features of the drill
press.
LED Speed Display
Speed
setting
Handwheel
On/Off Switch
Depth Stop
Spindle
Feed Handle
Head locking
Handle
Motor
Column
Table
height
adjustment
Rack
Work Table
Base
Figure 1 – Drill Press Features
Set-up and Assembly
Securing the Base
The base of the drill press has four mounting
holes. The drill press should be level and rest
solidly on the floor. Place shims under the four
mounting holes in the base as required to level
the drill press.
Assembly
The Drill Press is shipped with the head in
lowered position. Follow these instructions to
assemble.
1. Figure 2: Loosen locking handle on head
and raise the head toward the top of the
column. NOTE: Use an assistant to help
raise the head. Re-tighten locking handle to
secure head in position.
Figure 2
2. Figure 3: Use a wrench to loosen the hex
screw on the head collar, and raise the head
collar until it is contacting the head. Firmly
tighten the screw on the head collar.
3. Figure 3: Loosen the set screw on the rack
ring and raise rack ring to allow clearance
for the rack. Re-tighten the set screw.
Figure 3

9
4. Figure 4: Loosen (do not remove) the four
screws in the worm gear housing.
Figure 4
5. Figure 5: Place the rack against the column
and slide it down as far as it will go into the
slot in the table bracket. (Position the rack
with the longer flat area toward the top and
the short flat area toward the bottom.)
6. Figure 5: Slide the rack ring down onto the
top of the rack and tighten the set screw on
the rack ring.
Figure 5
7. Tighten the four screws in the worm gear
housing (shown in Figure 4).
8. Figure 6: Install the table raising handle and
tighten its set screw. Rotate the handle to
move the table up and down the column,
checking that movement is smooth and rack
has been correctly installed.
Figure 6
Cleaning
Clean off any protective grease with solvent.
After cleaning, lubricate the base, table, and
column with a light coating of medium weight
machine oil. Repeat at six months intervals.
Internal parts of the drill press are lubricated at
the factory. No further lubrication is required at
the time of installation.
Electrical Connection
Refer to the Wiring Diagram section for wiring
information. Connection to electrical power
should be made by a qualified electrician.
Observe local electrical codes when connecting
the machine.
The motor should be protected with a time delay
fuse or circuit breaker with an amperage rating
slightly higher than the full load current of the
motor.
Operating Controls
(Refer to Figure 7)
ON/OFF Switch
The ON/OFF switch is located at the front of the
drill head.
Speed Control Handwheel
To avoid damage to the
speed adjustment mechanism, the motor
must be oper-ating before attempting to
adjust the speed rate.

10
The speed control handwheel is located on the
left side of the drill head. An LED speed
indicator is provided on the face plate on the drill
head.
LED Speed
Display
On/Off Switch
Speed control
Handwheel
Depth
Stop
Figure 7 – Operating Controls
Depth Stop
A drilling depth stop (refer to Figure 8) is
provided on the right side of the drill head. The
depth stop consists of a threaded rod with depth
setting jam nuts. The front side of the threaded
rod has a depth scale. The jam nuts are
loosened and moved to the desired depth on the
scale. The upper jam nut is then tightened
against the lower nut.
Figure 8 – Depth Stop
Operating Precautions
The following operating and safety precautions
must be observed in order to avoid harm to the
operator or damage to the drill press.
1. The head assembly must be locked to the
column so the thrust produced by drilling will
not force the head assembly up the column.
2. The work table must be locked to the
column so it will not be forced down the
column.
3. Be sure the belt is tightened to the proper
tension.
4. DO NOT start to drill the workpiece until
making certain the workpiece is held down
securely.
5. BEFORE turning the speed control
handwheel in either direction.
6. Point of operation protection is required for
maximum safety. This remains the
responsibility of the user/purchaser since
conditions differ between jobs.
7. Make sure the drill is secured in the spindle
or check before attempting to use the drill
press.
8. Make sure the spindle taper is clean and
free of burrs, scoring, and galling to assure
maximum gripping.
Drilling Recommendations
Speeds for Drilling
The speed of a drill is usually measured in terms
of the rate at which the outer periphery of the
tool moves in relation to the work being drilled.
The common term for this is Surface Feet per
Minute (SFM). The relationship of SFM is
expressed in the following formulas:
)(26.0 InchesinDiameterDrillRPMSFM ××=
)(
8.3 InchesinDiameterDrill SFM
RPM ×=
In general, the higher the speed the shorter the
drill life. Operating at the low end of the speed
range for a particular material will result in longer
life. The most efficient speed for operating a drill
depends on many variables:
1. Composition and hardness of material.
2. Depth of the hole.
3. Efficiency of the cutting fluid.
4. Type and condition of the drilling machine.
5. Desired quality of the hole.
6. Difficulty of set-up.

11
Indication of Extreme Speeds and Feeds
A drill that splits up the web is evidence of too
much feed or insufficient tip clearance at the
center as a result of improper grinding. The
rapid wearing away of the extreme outer corners
of the cutting edges indicates that the speed is
too high. A drill chipping or breaking out at the
cutting edges indicates that either the feed is too
heavy or the drill has been ground with too much
tip clearance.
Speeds for High Speed Steel Drills
Material Speed In SFM
Alloy Steel — 300 to 400 Brinell.....................20 - 30
Stainless Steel...............................................30 - 40
Automotive Steel Forgings.............................40 - 50
Tool Steel, 1.2C.............................................50 - 60
Steel, .4C to .5C............................................70 - 80
Mild Machinery Steel, .2C to .3C..................80 - 110
Hard Chilled Cast Iron ...................................30 - 40
Medium Hard Cast Iron................................70 - 100
Soft Cast Iron........................................... 100 – 150
Malleable Iron...............................................80 – 90
High Nickel Steel or Monel............................40 – 50
High Tensile Bronze.....................................70 -150
Ordinary Brass and Bronze........................200 - 300
Aluminum and its Alloys.............................200 - 300
Magnesium and its Alloys..........................250 - 400
Slate, Marble, and Stone ................................15 -25
Plastics and similar material (Bakelite).......100 - 150
Wood .........................................................300 -400
Titanium Alloys..............................................10 - 25
Titanium Alloy Sheet......................................50 - 60
General Applications
5mm hole..................................................550 - 600
10mm hole................................................250 - 300
15mm hole................................................100 - 110
In cases where carbon steel drills are applicable,
the drill should be run at speeds of from 40 to 50
percent of those given above.
Maintenance
Replacement of Drive Belt
Make sure to disconnect
elec-trical power to the drill press to avoid
the possibility of inadvertent operation and
expo-sure to potentially lethal voltage levels.
1. Start drill press. Set speed control to highest
speed. Stop drill press.
2. Disconnect electrical power to drill press.
3. Remove head cover.
4. Remove belt. (With speed control setting at
the highest speed, the belt should be loose
enough to remove.)
5. Install the replacement belt. Install the head
cover.
6. Connect electrical power to the drill press.
7. Operate the drill press to verify correct
operation.
Replacement of Motor
Make sure to disconnect
elec-trical power to the drill press to avoid
the possibility of inadvertent operation and
expo-sure to potentially lethal voltage levels.
1. Disconnect electrical power to drill press.
2. Remove drive belt (see Replacement of Drive
Belt).
3. Disconnect electrical wiring from motor junction
box.
4. Remove nuts and washers from bolts
securing motor to drill head. Remove motor.
5. Remove pulleys and related components
from motor shaft.
6. Install pulleys and related components on
replacement motor shaft.
7. Install motor on mounting bolts and secure
with nuts and washers.
8. Connect electrical wiring (refer to Wiring
Diagram section for wiring details).
9. Install drive belt (see Replacement of Drive
Belt).
10. Operate drill press to verify proper
operation.
Lubrication
Following are lubrication recommendations for
drill press components.
Spindle pulley drive: Lubricate spindle
splines occasionally with light grease.
Quill, Table, and Column: Lubricate with
light film of oil.
Table lift rack: Lubricate regularly with
SAE20 oil (clean rack with solvent before
applying oil.)
Variable speed drive fork: Lubricate contact
points occasionally with grease.

12
Adjustments
Table Adjustment
The table can be raised or lowered to
accommodate the height of the component
being drilled (refer to Figure 9). To raise or
lower the table, loosen the lock handle. Then
use the hand crank to move the table to the
desired height. Then retighten the lock handle.
Figure 9 – Table Adjustment
Head Adjustment
Change the radial position of
the drill head only if the drill press base is
secured to the floor. Swinging the drill head
without the base being secured to the floor
will cause the drill press to become unstable
and tip over resulting in injury and/or
damage to the machine.
The radial position of the drill head can be
changed to accommodate the drilling of a hole
that may be offset from the center of the table.
Reposition the drill head by loosening the
locking handles and swinging the drill head to
the desired position. Then retighten the locking
handles.
Wiring Diagrams
Refer to Figure 5 for wiring information. The
drive motor is115/230 volt single phase or
220/440 volt three phase. Notice: When
converting machine voltage, it is necessary to
re-wire the LED display connection accordingly.
Refer to figure 10.
Figure 10

13
Electrical
115 Volt Operation
Referring to Figure 11:
As received from the factory, your drill press is
ready to run at 115-volt operation. This drill
press, when wired for 115 volt, is intended for
use on a circuit that has an outlet and a plug that
looks like the one illustrated in (A). A temporary
adapter, which looks like the adapter shown in
(B), may be used to connect this plug to a two-
pole receptacle if a properly grounded outlet is
not available. The temporary adapter should
only be used until a properly grounded outlet
can be installed by a qualified electrician. The
green colored rigid ear, lug, or tab, extending
from the adapter, must be connected to a
permanent ground such as a properly grounded
outlet box.
A
B
Figure 11
230 Volt Operation
Referring to Figure 12:
If 230V, single-phase operation is desired, the
following instructions must be followed:
1. Disconnect the machine from the power
source.
2. The JET drill press motor has four
numbered leads that are factory connected
for 115V operation, as shown in (A). For
230V operation reconnect the leads as
shown in (B).
3. The 115V attachment plug (C), supplied with
the drill press, must be replaced with a UL
listed plug suitable for 230V operation (D).
Contact your local Authorized JET Service
Center or qualified electrician for proper
procedures to install the plug. The drill
press must comply with all local and national
codes after the 230-volt plug is installed.
4. The drill press with a 230-volt plug should
only be connected to an outlet having the
same configuration as shown in (D). No
adapter is available nor should be used with
the 230-volt plug.
Figure 12
Permanently Connected Tools
Models J-A3816, J-A5816 and J-A5818 drill
presses that are intended for permanent
connection should be connected to a grounded
metal permanent wiring system or to a system
having an equipment-grounding conductor.

14
Grounding Instructions
This tool must be grounded
while in use to protect the operator from
electric shock.
In the event of a malfunction or breakdown,
grounding provides a path of least resistance for
electric current to reduce the risk of electric
shock. This tool is equipped with an electric
cord having an equipment-grounding conductor
and a grounding plug. The plug must be plugged
into a matching outlet that is properly installed
and grounded in accordance with all local codes
and ordinances.
Do not modify the plug provided. If it will not fit
the outlet, have the proper outlet installed by a
qualified electrician.
Improper connection of the equipment-
grounding conductor can result in a risk of
electric shock. The conductor, with insulation
having an outer surface that is green with or
without yellow stripes, is the equipment-
grounding conductor. If repair or replacement of
the electric cord or plug is necessary, do not
connect the equipment-grounding conductor to a
live terminal.
Check with a qualified electrician or service
personnel if the grounding instructions are not
completely understood, or if in doubt as to
whether the tool is properly grounded. Use only
three wire extension cords that have three-prong
grounding plugs and three-pole receptacles that
accept the tool’s plug.
Repair or replace a damaged or worn cord
immediately.
Extension Cords
Make sure your extension cord is in good
condition. When using an extension cord, be
sure to use one heavy enough to carry the
current your machine will draw. An undersized
cord will cause a drop in the line voltage
resulting in power loss and overheating. The
table following shows the correct size to use
depending on the cord length and name plate
ampere rating. If in doubt, use the next heavier
gauge. Remember, the smaller the gauge
number, the heavier the cord.
Length of Cord AWG
0–25 16
25-50 14
51-100 12
The drill press with a 230-volt plug should only
be connected to an outlet having the same
configuration (D, Fig. 12). No adapter is
available or should be used with the 230-volt
plug.
Important: In all cases (115 or 230 volts), make
certain the receptacle in question is properly
grounded. If you are not sure, have a registered
electrician check the receptacle.

15
Troubleshooting
Problem Probable Cause Suggested Remedy
Spindle does
not turn. Circuit breaker tripped.
Branch circuit breaker tripped or fuse
blown.
Open wire in switch circuit.
Defective switch.
Broken drive belt.
Reset circuit breaker.
Reset branch circuit breaker/replace fuse.
Repair open circuit.
Repair switch.
Replace drive belt.
Spindle noisy. Damaged spindle bearings.
Worn spline. Replace bearings. Replace spline.
Drill stalls. Worn drive belt.
Excessive feed rate for size of drill and
material being drilled.
No cutting fluid or improper cutting fluid.
Check condition of belt. Replace if glazed or
slipping on pulleys
Reduce feed pressure or use cutting fluid
Use correct cutting fluid.
Poorly drilled
holes. Drill dull
Lack of rigidity in hold-down method.
Speed too fast for material and drill size.
Feed too fast for material and drill size.
No or improper cutting fluid or coolant
being used.
Improperly ground drill bit.
Sharpen drill.
Check that all T-slot hold-downs are tight and that
table-lock and drill head bolts are tight.
Check spindle speed recommendations. Reduce
speed if necessary.
Reduce feed rate.
Use cutting fluid, or change to proper fluid or
coolant for material being drilled.
Check for proper angles and reliefs. Regrind to
proper geometry.
Motor
overheating Electrical circuit fault.
Oversize drill.
Excessive feed.
No cutting fluid, or wrong fluid
Check current draw in circuit. Make sure current
draw is the same as rating on motor plate.
Reduce drill size.
Reduce feed rate.
Use correct cutting fluid for the material and drill.
Table cannot
be raised. Lack of lubrication Lubricate.
No speed
readout. Speed pickup out of adjustment or failed. Adjust gap between speed pickup and post spindle pulley. If there is no readout on the speed
indicator, replace the speed pickup.
Parts
Ordering Replacement Parts
To order parts or reach our service department, call 1-800-274-6848 Monday through Friday (see our website for
business hours, www.jettools.com). Having the Model Number and Serial Number of your machine available
when you call will allow us to serve you quickly and accurately.

16
Parts List - Head Models J-A5816 and J-A5818
Item Part No. Description Size Qty.
1...............5507580...................Chuck (with Key)...................................................................................1
2A............5507495...................Arbor..................................................................#2 MT x JT3...............1
3A............5507496A ................Spindle..................................................................................................1
4...............J-5053070................Quill Band..............................................................................................1
5...............9010541...................O-Ring...................................................................................................1
6...............9054511...................Set Screw...........................................................5/16-18 x 3/8..............2
6-1............9054511A ................Flat Head Screw................................................M6x16........................1
7...............5032611...................Bearing Retainer ...................................................................................1
8...............9100331...................Bearing...............................................................6203ZZ.......................1
8-1............9100331A ................Bearing...............................................................6204ZZ.......................1
9...............5041010...................Quill ......................................................................................................1
10.............9058561...................Wavy Spring Washer.............................................................................1
11.............9074081...................Truarc Retainer ....................................................................................1
13.............9056981...................Hex Jam Nut ......................................................1/4-20.........................3
16.............5518170...................Sloted self taping Screw.....................................3/16-24 x 3/8..............4
17.............5518157...................Power Cord (1-Phase)...........................................................................1
17A ..........5517463...................Power Cord (3-Phase)...........................................................................1
18A ..........5507500...................Switch (Single Phase)............................................................................1
.................5507497...................Switch (3-Phase)...................................................................................1
19A ..........5507501...................Slotted Machine Screw.......................................1/4-20 x 1...................4
21.............5518158...................Wiring Harness (1-Phase)......................................................................1
.................5517457...................Wiring Harness (3-Phase)......................................................................1
24A ..........5507502...................Socket Head Cap Screw........................................................................3
25A ..........5507503...................Return Spring Assemlby........................................................................1
26A ..........5507504...................Nylon Nut..............................................................................................1
27.............9135311...................Lock Screw.........................................................1/4-20 x 1...................2
28.............J-5041050................Speed Change Housing.........................................................................1
29.............9127731...................Socket Set Screw...............................................5/16-18 x 5/16............1
30.............5024541...................Head Lock (Plain Side)..........................................................................1
31.............1000772...................Lock Nut Assembly................................................................................1
32.............5041071...................Speed Change Shaft .............................................................................1
33.............9053661...................Retainer ................................................................................................1
34.............5041201...................Bearing Spacer......................................................................................1
35.............9100321...................Bearing..................................................................................................2
36.............9070291...................Knob .....................................................................................................3
37.............5053000...................Spoke....................................................................................................3
38.............J-5507827................Feed Shaft Assembly.............................................................................1
39.............5513378...................Hi/Lo Speed Direction Plate...................................................................1
40.............5053100A ................Rod, Graduated.....................................................................................1
41.............9056381...................Jam Nut..............................................................5/8-11.........................3
41-1..........9056381A ................Nut M10xP1.5/Spring Washer M10........................................................1
42.............9128611...................Hex Head Cap Screw.........................................1/2-12 x 4...................1
44.............TS-0270031.............Set Screw...........................................................5/16-18 x 3/8..............4
45-1..........5032781-1 ...............Motor Plate Bar (serial no: 11110696 and higher) .......................................4
46.............9057111...................Whiz Flange Locknut.............................................................................4
47.............TS-0152051.............Carriage Bolt .....................................................5/16-18 x 2.................2
48.............9056171...................Carriage Bolt ......................................................5/16-18 x 1-1/2...........4
49-1..........9058051-1................Set Screw (serial no: 11110696 and higher).............5 /16”..........................4
51A ..........A5816-51A...............Lower Pulley..........................................................................................1
51B ..........A5816-51B...............Upper Pulley..........................................................................................1
51C..........A5816-51C ..............Spring....................................................................................................1
51D..........A5816-51D ..............Spring Support Cover............................................................................1
52.............9054621...................Socket Set Screw ..............................................1/4-20 x 1/2................2
53.............5042011...................Key (Motor)...........................................................................................1
54.............9077101...................Variable Speed Belt...............................................................................1

17
Parts List - Head Models J-A5816 and J-A5818
Item Part No. Description Size Qty.
55.............5041140...................Vaiable Speed Pulley (Spindle)..............................................................1
55A ..........5513510...................Hex Nut ................................................................................................1
55B ..........5513511...................SHCS ...................................................................................................1
56.............9100421...................Bearing..................................................................................................1
57.............9058571...................Spring Washer ......................................................................................1
58.............5041761...................Speed Change Nut................................................................................1
59.............5041040...................Speed Change Lever.............................................................................1
60.............9127951...................Socket Set Screw............................................... 1/4-20 x 1/2...............1
61.............9057461...................Washer............................................................... 1/4.............................3
62.............9052101...................Hex Head Cap Screw ........................................1/4-20 x 1...................4
63.............J-5041271................Right Mounting Plate.............................................................................1
64.............5518170...................Self Tapping Screw ...........................................3/16-24 x 3/8..............7
68A ..........TS-0208041 ...........SHCS ................................................................5/16-18x3/4................2
68B ..........5513513...................Spacer, Threaded..................................................................................1
68C..........5513514...................Plate, Bracket........................................................................................1
68D..........5513515...................Pickup, Magnetic...................................................................................1
68E ..........5513516...................Screw....................................................................................................2
68F...........5513521...................Plate......................................................................................................1
69.............J-5041320................Cover, Pulley.........................................................................................1
69A ..........J-5513517................Bracket, Face Plate...............................................................................1
70.............J-5513518................Plate, Face............................................................................................1
70A ..........5513519...................LED Display 1Ph...................................................................................1
.................5513736...................LED Display 3 Ph....................................................................................
70B ..........5513520...................Screw, Locking......................................................................................2
72.............9056771...................Hex Jam Nut ......................................................3/8-16.........................1
75.............J-5041000................Head Casting.........................................................................................1
76.............J-5518172................Left Mounting Plate................................................................................1
77.............9052831...................Socket Set Screw...............................................3/8-16 x 1...................1
78.............TS-0267101.............Socket Set Screw...............................................1/4-20 x 1-1/4.............2
80.............9052971...................Socket Set Screw ..............................................5/16-18 x 5/16............1
81.............5034111...................Hand Wheel ..........................................................................................1
82.............5513737...................Shaft speed change lever......................................................................1
86.............9129051...................Hex Nut..............................................................7/16-14.......................1
87.............5041470...................Collar ....................................................................................................1
88.............9128071...................Hex Head Cap Screw ........................................7/16-14 x 3-1/2...........1
89-1..........J-5032560-1.............Motor Mounting Bracket (Serial no: 11110696 and higher)..........................1
94.............TS-0680032.............Washer...............................................................5/16............................8
96.............5507505...................Return Spring Bracket...........................................................................1
97.............5507507...................Drift Pin.................................................................................................1
98.............5507506...................Switch Mounting Plate...........................................................................1
99.............5507527A ................Quill Assembly (see Note).....................................................................1
100...........J-A5816-100-1-1......Motor, 1 PH 115/220...........................................1725 RPM 60 Hz........1
.................A5816-100-2............Motor, 1PH 115/220 ...........................................1725 RPM 50 Hz .......1
.................J-A5818-100-1.........Motor, 3 PH 220/440...........................................1725 RPM 50/60 Hz ..1
101...........A5816-01.................Motor Plate............................................................................................1
110...........A5816-02.................Connect Box..........................................................................................1
111...........A5816-03.................Strain Relief...........................................................................................1
Note: .......Quill assembly includes items 3A, 5, 8, 8-1, 9, and 11.

18
Exploded View — Head Models J-A5816 and J-A5818

19
Parts List - Head Model J-A3816
Item Part No. Description Size Qty.
1...............5507580...................Chuck (with Key)...................................................................................1
2A............5507495...................Arbor..................................................................#2 MT x JT3 ..............1
3A............5507496A ................Spindle Assembly .................................................................................1
4...............J-5053070................Quill Band..............................................................................................1
5...............9010541...................O-Ring...................................................................................................1
6...............9054511...................Set Screw...........................................................5/16-18 x 3/8..............2
6-1............9054511A ................Flat Head Screw.................................................M6 x 16......................1
7...............5032611...................Bearing Retainer ...................................................................................1
8...............9100331...................Bearing...............................................................6203ZZ.......................1
8-1............9100331A ................Bearing...............................................................6204ZZ.......................1
9...............5041010...................Quill ......................................................................................................1
10.............9058561...................Wavy Spring Washer.............................................................................1
11.............9074081...................Truarc Retainer ....................................................................................1
13.............9056981...................Hex Jam Nut ......................................................1/4-20.........................3
16.............9052711...................Self Tapping Screw ............................................8-32 x 3/8...................4
17.............5518157...................Power Cord (Single Phase) ...................................................................1
17A ..........5517463...................Power Cord (3-Phase)...........................................................................1
18A ..........5507500...................Switch (Single Phase)............................................................................1
.................5507497...................Switch (3-Phase)...................................................................................1
19A ..........5507501...................Slotted Machine Screw..........................................................................4
21.............5518158...................Wiring Harness (1-Phase)......................................................................1
.................5517457...................Wiring Harness (3-Phase)......................................................................1
24A ..........5507502...................Socket Head Cap Screw........................................................................3
25A ..........5507503...................Return Spring Assemlby........................................................................1
26A ..........5507504...................Nylon Nut..............................................................................................1
27.............5518159...................Phillips Screw.....................................................1/4-20 x 5/16..............2
28.............5518160...................Cover Plate ...........................................................................................1
29.............9127731...................Socket Set Screw...............................................5/16-18 x 5/16............1
30.............5024541...................Head Lock (Plain Side)..........................................................................1
31.............1000772...................Lock Nut Assembly................................................................................1
33.............9053661...................Retainer ................................................................................................1
34.............5041201...................Bearing Spacer......................................................................................1
35.............9100321...................Bearing..................................................................................................2
36.............9070291...................Knob .....................................................................................................3
37.............J-5053000................Spoke....................................................................................................3
38.............J-5507827................Feed Shaft Assembly.............................................................................1
40.............5053100A ................Rod, Graduated.....................................................................................1
41.............9056381...................Jam Nut..............................................................5/8-11.........................3
41-1..........9056381A ................Nut ….M10xP1.5/Spring Washer........................M10............................1
42.............9128611...................Hex Head Cap Screw.........................................1/2-13 x 4...................1
44.............9052191...................Socket Set Screw...............................................5/16-18 x 1/2..............4
45-1..........5032781-1 ...............Motor Plate Bar (Serial no: 11110696 and higher).......................................4
46.............9057111...................Whiz Flange Locknut.............................................................................4
48.............9056171...................Carriage Bolt ......................................................5/16-18 x 1-1/2...........4
49-1..........9058051-1 ...............Set Screw (Serial no: 11110696 and higher)............5/16”...........................4
51.............5518161...................Step Pulley (Motor)................................................................................1
52.............5518162...................Socket Set Screw...............................................1/4-20 x 5/16..............2
53.............5042011...................Key (Motor)...........................................................................................1
54.............5518163...................Drive Belt..............OPTI VARIO 22x8x1140 or PYRA MID 1422V 470....1
55.............5518164...................Step Pulley (Spindle).............................................................................1
55A ..........5518165...................Spindle Pulley Shaft ..............................................................................1
55B ..........5518166...................Key.....................................................................5 x 45.........................1
57.............9058571...................Spring Washer ......................................................................................2
61.............9057461...................Washer...............................................................1/4..............................3
62.............9052101...................Hex Head Cap Screw.........................................1/4-20 x 1...................4
63.............J-5518167................Mounting Plate ......................................................................................1

20
Parts List - Head Model J-A3816
Item Part No. Description Size Qty.
64.............9138011...................Self Tapping Screw ............................................#10 x 3/4 Type A........4
69.............J-5518168................Pulley Cover (w/door & latch).................................................................1
70.............J-5518169................Face Plate.............................................................................................1
75.............J-5041000................Head Casting.........................................................................................1
76.............J-5518167L..............Left Mounting Plate................................................................................1
86.............9129051...................Hex Nut..............................................................7/16-14.......................1
87.............J-5041470................Collar ....................................................................................................1
88.............9128071...................Hex Head Cap Screw ........................................7/16-14 x 3-1/2...........1
89-1..........J-5032560-1.............Motor Mounting Bracket (Serial no: 11110696 and higher)..........................1
94.............9055281...................Rubber Washer.....................................................................................4
96.............5507505...................Return Spring Bracket...........................................................................1
97.............5507507...................Drift Pin.................................................................................................1
98.............5507506...................Switch Mounting Plate...........................................................................1
99.............5507527A ................Quill Assembly (see Note).....................................................................1
100...........J-5507812................Motor, 1 PH 115/220...........................................1725 RPM 60 Hz........1
.................J-5514604................Motor, 1PH 115/220 ...........................................1725 RPM 50 Hz .......1
.................J-5507813................Motor, 3 PH 220/440...........................................1725 RPM 50/60 Hz ..1
Note: Quill assembly includes items 5, 7, 8, 8-1, 9, 10 and 11.