Jet JWJ-8CS Service manual

Operating Instructions and Parts Manual
8-inch Woodworking Jointer
Models JWJ-8CS and JWJ-8HH
Model JWJ-8CS Model JWJ-8HH
JET
427 New Sanford Road
LaVergne, Tennessee 37086 Part No. M-718200
Ph.: 800-274-6848 Edition 4 11/2019
www.jettools.com Copyright © 2016 JET

2
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 ................................................................................................................................................... 5
Levers and Controls ...................................................................................................................................... 6
Specifications ................................................................................................................................................ 6
Setup and Assembly ..................................................................................................................................... 7
Unpacking and Cleanup ............................................................................................................................ 7
Installing Bed to Stand............................................................................................................................... 8
Installing Pedestal Switch (JWJ-8HH only) ............................................................................................... 8
Installing Handwheels................................................................................................................................ 9
Assembling Knife-Setting Gauge (JWJ-8CS only) .................................................................................... 9
Installing V-Belts........................................................................................................................................ 9
Installing Cutterhead Guard .................................................................................................................... 10
Installing Access Door ............................................................................................................................. 10
Installing Dust Chute ............................................................................................................................... 11
Electrical Connections ............................................................................................................................. 11
Extension Cords ...................................................................................................................................... 11
Adjustments ................................................................................................................................................ 12
90° Fence Adjustment ............................................................................................................................. 12
45° Fence Adjustment ............................................................................................................................. 12
Leveling Outfeed Table to Cutterhead Knives ........................................................................................ 13
Removing and Replacing Knives (JWJ-8CS only) .................................................................................. 14
Replacing or Rotating Knife Inserts (JWJ-8HH only) .............................................................................. 15
Infeed Table Depth Stop ......................................................................................................................... 16
Gib Adjustment ........................................................................................................................................ 16
Operation..................................................................................................................................................... 16
Jointing Warped Material......................................................................................................................... 17
Direction of Grain..................................................................................................................................... 17
Bevel Cut ................................................................................................................................................. 18
Taper Cut................................................................................................................................................. 18
Rabbet Cut .............................................................................................................................................. 18
Maintenance................................................................................................................................................ 19
Lubrication ............................................................................................................................................... 19
Blade Care............................................................................................................................................... 19
Sharpening Knives (JWJ-8CS only) ........................................................................................................ 19
Cutterhead Removal................................................................................................................................ 19
Replacement Parts...................................................................................................................................... 20
Fence Assembly (all models) .................................................................................................................. 21
Parts List – Fence Assembly (all models) ............................................................................................... 21
Bed Assembly (all models)...................................................................................................................... 22
Parts List – Bed Assembly (all models)................................................................................................... 23
Stand and Motor Assembly (JWJ-8CS only)........................................................................................... 24
Parts List – Stand and Motor Assembly (JWJ-8CS only)........................................................................ 25
Stand and Motor Assembly (JWJ-8HH only)........................................................................................... 26
Parts List – Stand and Motor Assembly (JWJ-8HH only)........................................................................ 27
Parts List – Cutterhead Assembly (JWJ-8CS only)................................................................................. 28
Parts List – Cutterhead Assembly (JWJ-8HH only) ................................................................................ 29
Electrical Connections (JWJ-8CS only)................................................................................................... 30
Electrical Connections (JWJ-8HH only) .................................................................................................. 31

4
Warning
1. Read and understand the entire owner’s 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 jointer 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 jointer, do not use until proper training and
knowledge have been obtained.
5. Do not use this jointer 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 jointer. Everyday eyeglasses only
have impact resistant lenses; they are not safety glasses.
7. Before operating this jointer, 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. Do not operate this machine while tired or under the influence of drugs, alcohol or any medication.
10. Make certain the switch is in the OFF position before connecting the machine to the power supply.
11. Make certain the machine is properly grounded.
12. Make all machine adjustments or maintenance with the machine unplugged from the power source.
13. 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.
14. 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.
15. Make sure the jointer is firmly secured to the stand or a bench before use.
16. 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.
17. Provide for adequate space surrounding work area and non-glare, overhead lighting.
18. Keep the floor around the machine clean and free of scrap material, oil and grease.
19. 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 the knives or other
moving parts. Do not overreach or use excessive force to perform any machine operation.
23. 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.
24. Use recommended accessories; improper accessories may be hazardous.
25. Maintain tools with care. Keep knives sharp and clean for the best and safest performance. Follow
instructions for lubricating and changing accessories.
26. 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.

5
27. Do not stand on the machine. Serious injury could occur if the machine tips over.
28. Never leave the machine running unattended. Turn the power off and do not leave the machine until it
comes to a complete stop.
29. 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.
Introduction
This manual is provided by JET covering the safe operation and maintenance procedures for the JET
Model JWJ-8CS and JWJ-8HH Woodworking Jointers. 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.
WARNING: Drilling, sawing, sanding or machining wood products generates wood dust and other
substances known to the State of California to cause cancer. Avoid inhaling dust generated from wood
products or use a dust mask or other safeguards for personal protection.
Wood products emit chemicals known to the State of California to cause birth defects or other
reproductive harm. For more information go to http://www.p65warnings.ca.gov/wood.
WARNING: This product can expose you to chemicals including titanium dioxide which is known to
the State of California to cause cancer, and lead which is known to the State of California to cause
cancer and birth defects or other reproductive harm. For more information go to http://www.
p65warnings.ca.gov.

6
Levers and Controls
Specifications
Model JWJ-8CS JWJ-8HH
Stock Number – Bed and Stand Kit ............................................718200K.......................................718250K
Stock Number – Bed Assembly .................................................. 718200J....................................... 718250J
Stock Number – Stand ................................................................718200S.......................................718250S
Cutting Capacity.....................................................................8"W x 1/2"D..................................8"W x 1/2"D
Cutterhead Speed .................................................................... 5500 RPM.................................... 5500 RPM
Number of Knives.................................................................................... 3.............................36 knife inserts
Rabbeting Capacity............................................................................. 1/2"...............................not applicable
Rabbet Ledge..................................................................... 3-1/8" x 8-3/4".............................. 3-1/8" x 8-3/4"
Table Surface...........................................................................9”W x 72”L................................... 9”W x 72”L
Fence .......................................................................... 4-3/4”W x 38-1/2”L....................... 4-3/4”W x 38-1/2”L
Knife Size ............................................................... 8”L x 11/16”W x 1/8”T.............. 0.59”L x 0.59”W x 0.10T
Fence Tilt.................................................................................. 45ºL, 45ºR ...................................45ºL, 45ºR
Positive Stops ...................................................................45ºL, 90º, 45ºR............................ 45ºL, 90º, 45ºR
Motor ............................................................. 2HP, 1Ph, 60Hz, 230V only......... 2HP, 1Ph, 60Hz, 230V only
Net Weight, Jointer and Stand (approx.).......................................375 lbs.......................................... 379 lbs
Shipping Weight, Jointer and Stand..............................................452 lbs.......................................... 456 lbs
The above specifications were current at the time this manual was published, 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.
1. Handwheel for Outfeed Table 8. On/Off Switch (Pedestal style on JWJ-8HH)
2. Outfeed Table 9. Rabbeting Ledge
3. Fence 10. Table Lock Knob
4. Fence Adjustment Handle 11. Fence Tilt Lock Handle
5. Cutter Guard 12. Fence Control Handle
6. Infeed Table 13. Belt Guard
7. Handwheel for Infeed Table 14. Dust Chute

7
Setup and Assembly
Contents of Shipping Cartons
Note: Unit shipped in two cartons.
Stand Carton
1 Stand with Motor
1 Stand Door
1 Dust Chute with Mounting Hardware
1 Pedestal Switch with Mounting
Hardware (JWJ-8HH only)
Main Unit Carton
1 Bed Assembly
1 Fence Assembly
1 Cutterhead Guard
1 Belt Guard
2 V-Belts
2 Handwheels with handle
1 Fence Handle
3 Mounting Bolts
3 3/8" Lock Washers
1 Operating Instructions and Parts
Manual
1 Warranty Card
Tools Included with JWJ-8CS
1 12/14mm Open End Wrench
1 8/10mm Open End Wrench
3 Hex Wrenches (3, 4 and 5 mm)
1 Knife Gauge Assembly
Tools included with JWJ-8HH
1 12/14mm Open End Wrench
1 8/10mm Open End Wrench
4 Hex Wrenches (3, 4, 5, 6 mm)
2 Star Point Screwdrivers
5 Knife Inserts
10 Knife Insert Screws
Tools Required for Assembly:
#1 Cross Point Screwdriver
6-8” Adjustable Wrench or 17 & 19mm
Wrench
Unpacking and Cleanup
1. Carefully finish removing all contents
from both shipping cartons. Compare
contents of the shipping cartons with
the list of contents above. Place parts
on a protected surface.
2. Set packing material and shipping
cartons to the side. Do not discard until
machine has been set up and is
running properly.
3. Clean all rust protected surfaces (bed,
fence, etc.) with kerosene or diesel oil.

8
Do not use gasoline, paint thinner,
mineral spirits, etc. These may damage
painted surfaces.
Cutterhead knives are
dangerously sharp!
Use extreme caution when cleaning.
4. Apply a thin layer of paste wax to the
bright surfaces of the fence and tables
to prevent rust.
Installing Bed to Stand
1. Use an assistant or hoist mechanism to
place bed assembly on top of stand.
Be sure identification label on the bed
faces the same direction as the label
on the stand (Fig. 1).
2. Line up two holes in top of stand with
holes in bed assembly by viewing
through access door in stand.
3. Attach bed assembly to stand with two
3/8" lock bolts and lock washers (Fig.
2). Hand tighten only at this time.
4. Line up third hole in stand with hole in
bed assembly by viewing through dust
chute.
5. Install third 3/8" lock bolt and lock
washer through dust chute to secure
bed to stand.
6. Tighten all three mounting bolts with
14mm wrench.
Installing Pedestal Switch (JWJ-
8HH only)
Referring to Figure 3:
1. The switch may be installed in either
high position or low position to suit the
operator. Slide the connection plug
through the opening (A) and secure the
pedestal switch using two 5/16”x3”
screws (C) and 5/16” flat washers (B).
2. Connect the plug from the pedestal
switch to the motor plug inside the
cabinet.
Figure 1
Figure 2
Figure 3

9
Installing Handwheels
1. Remove protective tape from shaft, and
remove screw and washer.
2. Press handwheel (A, Fig. 4) onto shaft,
aligning the keyway with the key. If
necessary, use a hammer with a block
of wood to tap the handwheel
completely onto the shaft.
3. Re-install screw and washer (B, Fig. 4).
4. Mount handle (C, Fig. 4) onto
handwheel.
Assembling Knife-Setting Gauge
(JWJ-8CS only)
Place the two bases (A, Fig. 5) onto each
end of the bar (B, Fig. 5). Snap the four E-
rings (C, Fig. 4) into the grooves on the bar
as shown, one E-ring on each side of a
base.
Installing V-Belts
1. Disconnect the machine from the
power source, unplug.
2. Remove the lock knob (A, Fig. 6) and
belt guard (B, Fig. 6).
3. Place v-belts onto cutterhead pulley
grooves and through opening in stand.
4. Pull v-belts down and place onto motor
pulley (Fig. 7). If necessary, loosen the
mounting screws (A, Fig. 7) and slightly
lift motor. Re-tighten the screws when
belt is placed.
5. Check to make sure that motor pulley
and cutterhead pulley are vertically
aligned and the v-belt does not contact
the sides of the opening in the base. If
the pulleys are not aligned, loosen the
screws (A, Fig. 7) on the motor base
and slide the motor until the belt is
aligned. Re-tighten screws.
6. The v-belt is properly tensioned when
finger pressure on the belt half way
between the two pulleys causes 1/2"
deflection. If the belt is too loose,
loosen the lower screws (B, Fig. 7) on
the mounting plate and push down on
the plate. When belt tension is correct,
re-tighten screws.
7. After two hours of operation, check belt
tension again. Re-tension if necessary.
8. Re-install belt guard and lock knob.
Figure 4
Figure 5
Figure 6
Figure 7

10
Installing Cutterhead Guard
The cutterhead guard has a spring tension
mechanism which must be properly
tensioned when installing the cutterhead
guard on the machine.
To install the cutterhead guard:
1. Insert a small hex wrench, or similar
object, into the pin on the guard tension
mechanism (Figure 8-1).
2. Twist the hex wrench and pin
clockwise, as shown in Figure 8-2, and
hold them there.
3. Lower the shaft of the guard into the
hole on the jointer’s rabbeting ledge.
See Figure 8-3. The guard should be
lowered into the hole far enough that
the groove in the guard’s shaft will
mate with the shaft of the set screw
(Figure 8-3).
4. After the guard has been inserted into
the hole, let go of the guard with your
left hand - the guard will swing toward
the fence.
5. Completely tighten the set screw
(Figure 8-3), while continuing to hold
the hex wrench and pin with your right
hand.
6. When the guard is secured, remove the
hex wrench from the pin. Slightly
loosen the set screw (Figure 8-3) until
the pin snaps back against the
rabbeting ledge.
7. Re-tighten the set screw (Figure 8-3).
Installing Access Door
Install access door by placing bottom of
panel into access in stand and fastening by
turning latch (Fig. 9).
If the access door latch needs
adjustment:
1. Remove the access door from the
stand.
2. Loosen the hex lock nut (A, Fig. 9).
Rotate the latch a quarter turn
clockwise to tighten and
counterclockwise to loosen.
3. Tighten the lock nut (A, Fig. 9).
4. Re-install the access door.
Figure 8-1
Figure 8-2
Figure 8-3