Jet 22-44 Pro-3 Service manual

Operating Instructions and Parts Manual
Drum Sander
Model 22-44 Pro-3
JET
427 New Sanford Road Part No. M-649600
LaVergne, Tennessee 37086 Revision B 03/2016
Ph.: 800-274-6848 ECR 16020409184
www.jettools.com Copyright © 2014 JET
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Warranty and Service
JET warrants every product it sells 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 branded website.
•JET 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 or materials 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. JET woodworking machinery is designed to be used with Wood.
Use of these machines in the processing of metal, plastics, or other materials outside recommended guidelines may
void the warranty. The exceptions are acrylics and other natural items that are made specifically for wood turning.
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 has 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 website.
More Information
JET is constantly adding new products. For complete, up-to-date product information, check with your local distributor
or visit the JET website.
How State Law Applies
This warranty gives you specific legal rights, subject to applicable state law.
Limitations on This Warranty
JET LIMITS 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 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 sells through distributors only. The specifications listed in JET printed materials and on official JET website are
given as general information and are not binding. JET reserves 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 JPW Industries, Inc.
Product Listing with Warranty Period
90 Days – Parts; Consumable items
1 Year – Motors; Machine Accessories
2 Year – Metalworking Machinery; Electric Hoists, Electric Hoist Accessories; Woodworking Machinery used
for industrial or commercial purposes
5 Year – Woodworking Machinery
Limited Lifetime – JET Parallel clamps; VOLT Series Electric Hoists; Manual Hoists; Manual Hoist
Accessories; Shop Tools; Warehouse & Dock products; Hand Tools; Air Tools
NOTE: JET is a division of JPW Industries, Inc. References in this document to JET also apply to JPW Industries,
Inc., or any of its successors in interest to the JET brand.

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Table of Contents
Warranty and Service..............................................................................................................................2
Table of Contents....................................................................................................................................3
Warning...................................................................................................................................................4
Introduction .............................................................................................................................................6
Specifications..........................................................................................................................................6
Features and Terminology.......................................................................................................................7
Unpacking...............................................................................................................................................8
Hardware.............................................................................................................................................8
Contents of the Shipping Container......................................................................................................8
Assembly ................................................................................................................................................9
Install Stand Legs ................................................................................................................................9
Table Support Screws..........................................................................................................................9
Handwheel Installation.......................................................................................................................10
Conveyor Table Installation................................................................................................................10
Infeed and Outfeed Table Installation.................................................................................................10
Leveling the Sander...........................................................................................................................11
Dust Collection...................................................................................................................................11
Installing Abrasives............................................................................................................................12
Grounding Instructions...........................................................................................................................14
Extension Cords.................................................................................................................................14
Adjustments ..........................................................................................................................................15
Dust Cover.........................................................................................................................................15
Table Height Control..........................................................................................................................15
Depth Gauge/Depth Stop...................................................................................................................16
Digital Scale.......................................................................................................................................16
Drum Alignment.................................................................................................................................18
Initial Drum Alignment........................................................................................................................18
Fine-Tuning Drum Alignment..............................................................................................................19
Conveyor Belt Tension and Tracking..................................................................................................19
Trackers.............................................................................................................................................20
Conveyor Belt Replacement...............................................................................................................20
Tension Roller Adjustment.................................................................................................................20
Adjusting Table Supports...................................................................................................................21
Replacing V-Belt................................................................................................................................21
Rotating Drum Bearings.....................................................................................................................22
Replacing Drum Bearings ..................................................................................................................22
Operation..............................................................................................................................................24
Basic Operating Procedure ................................................................................................................24
Setting Depth of Cut...........................................................................................................................24
Establishing Proper Drum Height .......................................................................................................24
Selecting SandSmart™ Feed Rates...................................................................................................24
Tips for Maximum Performance..........................................................................................................25
Maintenance..........................................................................................................................................26
Tracker Kit.............................................................................................................................................27
Abrasives..............................................................................................................................................28
Abrasive Selection Guide...................................................................................................................28
Troubleshooting.....................................................................................................................................29
Troubleshooting – Motor and Electrical Problems...............................................................................29
Troubleshooting – Mechanical Problems............................................................................................30
Troubleshooting – Operational Problems............................................................................................31
Optional Accessories.............................................................................................................................32
Parts .....................................................................................................................................................32
Replacement Parts.............................................................................................................................32
Infeed and Outfeed Tables.................................................................................................................33
Stand Assembly.................................................................................................................................34
Drum Head Assembly........................................................................................................................36
Conveyor and Motor Assembly...........................................................................................................38
Electrical Schematic..............................................................................................................................40

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Warning
1. Read and understand this entire manual before attempting assembly or operation.
2. Read and understand the warnings posted on the machine and in this manual. Failure to comply with
all of these warnings may cause serious injury.
3. Replace the warning labels if they become obscured or removed.
4. This sander 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 sander, do not use until proper training
and knowledge have been obtained.
5. Do not use this sander for other than its intended use. If used for other purposes, JET disclaims any
real or implied warranty and holds itself harmless from any injury that may result from that use.
6. Always wear approved safety glasses/face shields while using this sander. Everyday eyeglasses only
have impact resistant lenses; they are not safety glasses.
7. Before operating this sander, remove tie, rings, watches and other jewelry, and roll sleeves up past
the elbows. Remove all loose clothing and confine long hair. Non-slip footwear or anti-skid floor strips
are recommended. Do not wear gloves.
8. Wear ear protectors (plugs or muffs) during extended periods of operation.
9. 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.
10. Do not operate this machine while tired or under the influence of drugs, alcohol or any medication.
11. Make certain the switch is in the OFF position before connecting the machine to the power supply.
12. Make certain the machine is properly grounded.
13. Make all machine adjustments or maintenance with the machine unplugged from the power source.
14. Remove adjusting keys and wrenches. Form a habit of checking to see that keys and adjusting
wrenches are removed from the machine before turning it on.
15. Keep safety guards in place at all times when the machine is in use. If removed for maintenance
purposes, use extreme caution and replace the guards immediately.
16. Make sure the sander is firmly secured to the stand or work table before use.
17. Check damaged parts. Before further use of the machine, 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. A guard or other part that is damaged should
be properly repaired or replaced.
18. Provide for adequate space surrounding work area and non-glare, overhead lighting.
19. Keep the floor around the machine clean and free of scrap material, oil and grease.
Keep visitors a safe distance from the work area. Keep children away.
20. Make your workshop child proof with padlocks, master switches or by removing starter keys.
21. Give your work undivided attention. Looking around, carrying on a conversation and “horse-play” are
careless acts that can result in serious injury.
22. Maintain a balanced stance at all times so that you do not fall or lean against moving parts. Do not
overreach or use excessive force to perform any machine operation.

5
23. Stand to one side of the conveyor and make sure no one else is standing in line with the conveyor
while feeding into the machine. Should a part slip while being fed, it may exit the machine at a high
rate of speed and can cause injuries to anyone standing directly in front of the infeed.
24. Use the right tool at the correct speed and feed rate. Do not force a tool or attachment to do a job for
which it was not designed. The right tool will do the job better and safer.
25. Use recommended accessories; improper accessories may be hazardous.
26. Maintain tools with care. Keep abrasives clean for the best and safest performance. Follow
instructions for lubricating the machine and changing accessories.
27. Always feed stock against the rotation of the drum.
28. Keep your hands clear when feeding parts onto the conveyor. The part will be forced down as it
begins to feed, causing a pinching action between the part and the conveyor bed. Never reach into a
running machine. Turn off sander and disconnect from power before attempting to retrieve parts from
beneath the drum.
29. Turn off the machine and disconnect from power before cleaning. Use a brush or compressed air to
remove chips or debris — do not use your hands.
30. Do not stand on the machine. Serious injury could occur if the machine tips over.
31. Never leave the machine running unattended. Turn the power off and do not leave the machine until it
comes to a complete stop.
32. Remove loose items and unnecessary work pieces from the area before starting the machine.
Familiarize yourself with the following safety notices used in this manual:
This means that if precautions are not heeded, it may result in minor injury and/or
possible machine damage.
This means that if precautions are not heeded, it may result in serious injury or possibly
even death.
- - SAVE THESE INSTRUCTIONS - -

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Introduction
This manual is provided by JET covering the safe operation and maintenance procedures for a JET
Model 22-44 Pro-3 Drum Sander. This manual contains instructions on installation, safety precautions,
general operating procedures, maintenance instructions and parts breakdown. This machine has been
designed and constructed to provide consistent, long-term operation if used in accordance with
instructions set forth in this manual. If there are any questions or comments, please contact either your
local supplier or JET. JET can also be reached at our web site: www.jettools.com.
Specifications
Model Number.........................................................................................................................22-44 Pro-3
Stock Number................................................................................................................................ 649600
Capacities and Speeds:
Maximum Sanding Width (in.) ..........................................................................................44 (2 passes)
Minimum Sanding Length (in.).......................................................................................................2-1/4
Maximum Sanding Thickness (in.).......................................................................................................4
Minimum Sanding Thickness (in.)................................................................................................... 1/32
Drum Speed (RPM) ......................................................................................................................1600
Conveyor Feed Rate (SFPM)....................................................................................... variable, 0 to 10
Dust Exhaust:
Dust Port Outside Diameter (in.).........................................................................................................4
Minimum Dust Collection Capacity (CFM).......................................................................................600
Motor and Electrical:
Drum Motor.......................................................Totally Enclosed Fan Cooled, induction, capacitor start
Horsepower.................................................................................................................................. 3 HP
Phase......................................................................................................................................... Single
Voltage.................................................................................................................................230 V only
Cycle............................................................................................................................................60Hz
Listed Full Load Amps.......................................................................................................................14
Conveyor Motor................................................................. 43 in.-lbs. Torque, 1/30 HP Direct Drive DC
Dimensions and Weights:
Drum Bearing Diameter (in.) ...............................................................................................................1
Overall Dimensions (L x W x H)(in.) ...................................................................................41 x 41 x 52
Drum Dimensions (diam. x L)(in.).................................................................................................5 x 22
Net Weight (lbs.).............................................................................................................................385
Shipping Weight (lbs.).....................................................................................................................394
The specifications in this manual were current at time of publication, but because of our policy of
continuous improvement, JET reserves the right to change specifications at any time and without prior
notice, without incurring obligations.

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Features and Terminology
The illustration below shows the major components and features of the 22-44 Pro-3 Sander. These are
referenced throughout the manual and will help to familiarize you with the operation and functions of the
machine.
Features
Read and understand the entire contents of this manual before attempting set-up
or operation! Failure to comply may cause serious injury.

8
Unpacking
Compare the contents of your container with the
following parts list to make sure all parts are
intact. Missing parts, if any, should be reported
to your distributor. Read the instruction manual
thoroughly for assembly, maintenance and
safety instructions.
Hardware
Hardware
Note: The letter designators identifying parts on
this page are used throughout this manual for
reference convenience.
08 Hex Cap Screw, 3/8”x1-1/2” (A)
08 Hex Cap Screw, 3/8”x1” (B)
02 Hex Cap Screw, 5/16”x3/4” (C)
08 Carriage Bolt, 1/4"x3/4" (D)
16 Flanged Lock Nuts, 3/8” (E)
04 Hex Nut, 1/2" (F)
04 Flat Washer, 1/2" (G)
16 Flat Washer, 3/8" (H)
08 Hex Nut, 1/4" (J)
08 Flat Washer, 1/4" (K)
02 Square Nut, 5/16" (L)
02 Drum Alignment Templates (M)
01 Owner's Manual (not shown)
01 Warranty Card (not shown)
Contents of the Shipping Container
01 Drum Sander with stand (N)
01 Conveyor Table Assembly (O)
01 Handwheel Knob (P)
01 Handwheel (Q)
04 Legs (R)
02 LH Mounting Bracket (S)
02 RH Mounting Bracket (T)
02 Infeed/Outfeed Table (U)
02 Open-end Wrenches, 9/16", 1/2" (V)
04 Caster (W)
02 Hex Wrenches, 4mm and 1/8” (X)
01 TufTool (Y)
02 Assembly Fixtures (Z1)and Plywood (Z2)
Shipping Contents

9
Assembl
y
Tools required for assembly:
Hoist, forklift, or one or more assistants
Wrenches – 9/32”, 1/2” , 9/16”
Hex wrenches – 4mm, 1/8”
Install Stand Legs
The sander is heavy; use
caution when lifting.
1. Raise the sander from the floor using a forklift,
hoist or an assistant. Place hoist straps through
the carriage arm (see Features on page 7) or
below the table mounting brackets. If using a
forklift, place fork below the table mounting
brackets (see Features on page 7).
Referring to Figure 1:
2. Position the assembly fixtures (Z1) below the
columns so that the wider part of the
plywood (Z2) faces outward. Lower the sander
columns into the assembly fixtures.
3. Mount the four legs (R) to the columns, using
four each 3/8x1-1/2 hex cap screws (A), 3/8 flat
washers (H) and 3/8 flanged lock nuts (E),
Tighten flanged nuts securely with 9/16”
wrench, making sure the legs (R) remain in
contact with the plywood (Z2).
4. Lift the sander and remove the assembly
fixtures (Z1, Z2).
Referring to Figure 2:
5. With the sander raised, install casters (W) to
legs (R). First lock the caster by pressing the
large tab to remove the hex nut (F) and flat
washer (G).
Table Support Screws
The set-screws on the table supports (Figure 3)
have been tightened at the factory to eliminate free-
play between the table supports and the columns
during shipment. All four set-screws must be
loosened and re-adjusted before operating
either the height adjustment mechanism or the
conveyor drive. Proceed as follows:
Failure to follow the below
procedure may result in misalignment of the
drum and/or conveyor bed, or may damage the
miter gears.
1. Loosen each hex nut with an open-end wrench,
then loosen the set-screw with a hex wrench.
2. Re-tighten the set-screw with your fingers until
it only lightly touches the column tube.
3. Hold the set-screw in position with the hex
wrench, and re-tighten the hex nut.
Figure 1
Figure 2
Figure 3

10
Handwheel Installation
Mount the handwheel to the top of the height
adjustment screw (Figure 4). Align one of the set-
screws with the flat on the height adjustment screw,
and tighten both set-screws.
Install the knob to the threaded hole in the
handwheel, and tighten the hex nut against the
handwheel.
Conveyor Table Installation
1. Lower the table mounting brackets by rotating
the handwheel.
Referring to Figure 5:
2. Place the conveyor table (O) on the mounting
brackets of the stand. The gear motor should
be on the right as shown.
3. Secure the conveyor table with four each
3/8”x1” hex cap screws (B), 3/8” flat washers
(H) and 3/8” flanged lock nuts (E).
4. Plug the motor cord into the control box
receptacle (Figure 6).
IMPORTANT: The conveyor belt has been
overtightened for shipping purposes. It must be
tensioned properly before operating the sander!
See Conveyor Belt Tension and Tracking on
page 19.
Infeed and Outfeed Table Installation
Referring to Figure 7:
1. Remove the lower hex cap screw (C) and
square nut (L) from the rail on the infeed side of
the sander.
2. Slide a left hand mounting bracket (S) into the
end of the rail.
3. Align holes and re-install the hex cap screw (C)
and square nut (L). Install a 3/8”x1” hex cap
screw (B), 3/8” flat washer (H) and flanged lock
nut (E).
4. Tighten the hex cap screw (C) first to align the
bracket, then tighten the flanged lock nut (E) on
the 3/8” screw.
5. Install a right hand mounting bracket (T) in the
same manner.
Note: You will have to open the control box to
remove the screw from the rail – remove the
front lower screw and base panel (Item # 16 on
page 39) of the control box.
6. Position the table (U) over the brackets (S,T)
and install four each 1/4”x3/4” carriage
bolts (D), 1/4” flat washers (K), and 1/4” hex
nuts (J). Do not fully tighten yet.
Figure 4
Figure 5
Figure 6