JET 577003 User Manual
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Operating Instructions and Parts Manual
Belt and Disc Sander (1x42” belt, 8” disc)
Model J-4002
JET
427 New Sanford Road Part No. M-577003
LaVergne, Tennessee 37086 Revision B 04/2015
Ph.: 800-274-6848
www.jettools.com Copyright © 2015 JET
(ECR TW0134)
1.0 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 Co vered
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 o f these machines in the processing of metal, plast ics, or other materials outs ide recommend ed gui delines m ay
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 initia l p u rch a s e whe n 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 Informa tion
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 Appli es
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
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; 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
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.
®
branded products are not sold in Canada by JPW Industries, Inc.
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2.0 Table of contents
Section Page
1.0 Warranty and Service ..................................................................................................................................... 2
2.0 Table of contents ............................................................................................................................................ 3
3.0 Safety Warnings ............................................................................................................................................. 4
3.1 General Cautions ....................................................................................................................................... 4
3.2 General Machinery Warnings ..................................................................................................................... 4
3.3 General Electrical Cautions ........................................................................................................................ 5
3.4 Safety Instructions for the Belt/ Disc Sander .............................................................................................. 5
4.0 About this manual .......................................................................................................................................... 6
5.0 Specifications ................................................................................................................................................. 6
6.0 Unpacking ...................................................................................................................................................... 7
7.0 Assembly ........................................................................................................................................................ 7
7.1 Assembling disc sander table ..................................................................................................................... 7
7.2 Assembling belt sander table ..................................................................................................................... 7
8.0 Setup .............................................................................................................................................................. 8
8.1 Fastening sander to supporting surface ..................................................................................................... 8
8.2 Dust chutes ................................................................................................................................................ 8
9.0 Electrical connections .................................................................................................................................... 8
9.1 Grounding instructions ................................................................................................... ............................ 8
10.0 Adjustments ................................................................................................................................................. 9
10.1 Sanding belt tracking ................................................................................................................................ 9
10.2 Platen ....................................................................................................................................................... 9
10.3 Belt table adjustments .............................................................................................................................. 9
10.4 Disc table adjustments ........................................................................................................................... 10
10.5 Changing abrasive belts ......................................................................................................................... 10
10.6 Changing abrasive discs ........................................................................................................................ 11
10.7 Miter gauge ............................................................................................................................................ 11
10.8 Motor Belt ............................................................................................................................................... 11
11.0 Operating instructions ................................................................................................................................ 12
11.1 Starting and stopping sander ................................................................................................................. 12
11.2 Locking switch in OFF position ............................................................................................................... 12
12.0 Typical operations ...................................................................................................................................... 12
13.0 Replacement Parts ..................................................................................................................................... 14
13.1.1 J-4002 Belt Parts – Exploded View ..................................................................................................... 14
13.1.2 J-4002 Belt Parts – Parts List .............................................................................................................. 14
13.2.1 J-4002 Disc Parts – Exploded View .................................................................................................... 16
13.2.2 J-4002 Disc Parts – Parts List ............................................................................................................. 17
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3.2 General Machinery Warnings
3.0 Safety Warnings
3.1 General Cautions
- Misuse of this machine can cause serious injury.
- For safety, the machine must be set up, used and
serviced properly.
- Read, understand and follow the instructions in the
Operating Instructions and Parts Manua l which was
shipped with your machine.
When setting up the machine:
- Always avoid using the machine in damp or poorly
lighted work areas.
- Always be sure the machine is securely anchored
to the floor or the work bench.
- Always keep the machine guards in place.
- Always put the start switch in the “OFF” position
before plugging in the machine.
When using the machine:
- Never operate the machine with safety guards
missing.
- Always wear safety glasses with side shields (See
ANSI Z87.1)
- Never wear loose clothing or jewelry.
- Never overreach; you may slip and fall into the
machine.
- Never leave the machine running while unattended.
- Always shut the machine off when not in use.
When servicing the machine:
- Always unplug the machine from the electrical
power before servicing.
- Always follow the instructions in the Operating
Instructions and Parts Manual when changing
accessory tools or parts.
- Never modify the machine without consulting JET.
You — the stationary power tool user — hold the key
to safe ty.
Read and follow these simple rules for best results
and full benefits from your machine. Used properly,
JET machinery is among the best in design and
safety. However, any machine used improperly can
be rendered inefficient and unsafe. It is mandatory
that those who use our products be properly trained in
how to use them correctly. They should read and
understand the Operator’s and Parts Manual as well
as all labels affixed to the machine. Failure in
following all of these warnings can cause serious
injuries.
1. Always wear protective eye wear when
operating machinery. Eye wear shall be impact
resistant, protective safety glasses with side
shields which comply with ANSI Z87.1
specifications. Use of eye wear which does not
comply with ANSI Z87.1 specifications could
result in severe injury from the breakage of the
eye protection.
2. Wear proper apparel. No loose clothing or
jew elry w hic h ca n get c aug ht i n mov ing p art s.
Rubber soled, nonslip, footwear is
recommended for best footing.
3. Do not overreach. Failure to maintain a proper
working position can cause you to fall into the
machine or cause your clothing to get ca ught
— pulling you into the machine.
4. Keep guards in place and in proper working
order. Do not operate the machine with the
guards removed.
5. Avoid dangerous working environments. Do
not use stationary machine tools in wet or
damp locations. Keep work areas clean and
well lit.
6. Avoid accidental starts by be ing sure that the
start switch is in the “OFF” position before
plugging in the machine.
7. Never leave the machine running while
unattended. The machine shall be shut off
whenever it is not being used.
8. Disconnect the electrical power before
servicing, whenever changing accessories or
when general maintenance is done on the
machine.
9. Maintain all machine tools with care. Follow all
maintenance instructions for lubricating and
the changing of accessories. No attempt shall
be made to modify or have makeshift repairs
done to the machine. This not only voids the
warranty but also renders the machine unsafe.
10. If there is any risk of tipping or sliding, the
machinery must be anchored to the floor.
11. Secure your work. Use clamps or a vise to
hold your work, when practical. It is safer than
using your hands and it frees both hands to
operate the machine.
12. Never brush chips away while the machine is
in operation.
13. Keep work area clean. Cluttered areas invite
accidents.
14. Remove adjusting keys and wrenches before
turning the machine on.
15. Use the right tool. Don’t force a tool or
attachment to do a job for which it was not
designed.
16. Use only recommended accessories and
follow manufacturer’s instructions pertaining to
them.
17. Keep hands in sight and clear of all moving
parts and cutting surfaces.
18. All visitors should be kept at a safe distance
from the work area. Make your workshop
completely safe by using padlocks, master
switches, or by removing starter keys.
19. Know the tool you are using; its application,
limitations, and potential hazard s.
3.3 General Electrical Cautions
This machine should be grounded in accordance with
the National Electrical Code and local codes and
ordinances. The work should be done by a qualified
electrician. The machine should be grounded to
protect the user from electrical shock.
WARNING: Do not connect the sander to a 240 volt
power source. The sander motor requires 120 volts
alternating current.
Wire Sizes
CAUTION: For circuits which are far away from the
electrical ser vice b ox, the wire s ize must be in crea sed
in order to deliver ample voltage to the motor. To
minimize power losses and to prevent motor
overheating and burnout, the use of wire sizes for
branch circuits or electrical extension cords according
to the following table is recommended:
Conductor length AWG number
(American Wire Gauge)
120 volt lines
0-50 feet No. 14
50-100 feet No. 12
Over 100 f eet No. 8
Table 1
3.4 Safety Instructions for the Belt/
Disc Sander
WARNING: Do not operate your machine until it is
completely assembled and installed according to
the instructions.
WARNING: 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 wellventilated area and work with approved safety
equipment, such as face or dust masks that are
specifically designed to filter out microscopic
particles.
WARNING: This machine can be used for
processing wood or metal products. However,
combining wood dust and metal filings can create a
fire hazard. Make sure that the dust collector is free
of wood dust deposits before processing metal
products.
1. If you are not thoroughly familiar with the
operation of belt and disc sanders, obtain
advice from your supervisor, instructor or ot her
qualified person.
2. If there is a tendency for the machine to tip
over or move during operation such as when
sanding long or heavy boards, the machine
must be securely fastened to a supporting
surface.
3. Make sure the sanding belt is running in the
proper direction. The sanding belt must trave l
downward when viewed from the front of the
machine.
4. Make sure the sanding belt is tracking
correctly in order that it does not run off the
pulleys.
5. Make sure the sanding belt or disc is not torn
or loose.
6. Hold the work fi rmly when s anding.
7. Always hold the work firmly on the table when
sanding on the belt or disc. The only exception
is curved work perform ed on the top wheel of
the belt.
8. Always sand on the downward side of the disc
when using the disc portion of t he mac hine, so
that the work is held securely on the table.
Sanding on the upward side of the disc could
cause the workpiece to fly up which could be
hazardous.
9. Always maintain a minimum clearance of 1/16inch or less between the table and the sanding
belt or disc.
10. Never wear gloves or hold the work w ith a rag
when sanding.
11. Sand with the grain of the wood.
12. Do not sand pieces of material that are too
small to be safely supported.
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13. Avoid awkward hand positions where a
sudden slip could cause a hand to move into
the sanding belt or disc.
18. Always remove scrap pieces and other objects
from the belt and disc tables before turning on
the machine.
14. When sanding a large workpiece, provide
additional support at table height.
15. Never force the work. Slowing or stalling the
motor will cause overheating.
16. When sanding metal, never use a steady
stream of water on the work piece. Dip the
workpiece in water to cool it.
17. Do not sand or polish magnesium. It could
catch fire.
Familiarize yourself with the following safety notices used in this manual:
This means that if preca utions are not heeded, it m ay result in minor injury a nd/or possible
machine damage.
This means that if precautions are not heeded, it may result in serious injury or possibly even
death.
19. Never per form la yout, assem bly or set- up w o r k
on the tables while the sander is operating.
20. Always turn the machine OFF and disconnect
the cord from the power source before
installing or removin g accessories .
21. Never leave the mac hine work area when the
power is ON or before the machine has come
to a complete stop.
4.0 About this manual
This manual is provided by JET covering the safe operation and maintenance procedures for the J-4002
Belt/Disc Sander. This manual contains instructions on installation, safety precautions, general operating
procedures, maintenance instructions and parts breakdown. Your machine has been designed and constructed
to provide consistent, long-term operation if used in accordance with the instructions as set forth in this
document.
If there are questions or comments, please contact your local supplier or JET. JET can also be reached at our
web site: www.jettools.com.
Retain this manual for future reference. If the machine transfers ownership, the manual should accompany it.
Read and understand the entire contents of this manual before attem pting assembly
or operation! Failure to comply may cause serious injury!
5.0 Specifications
Model number .............................................................................................................................................. J-4002
Stock number .............................................................................................................................................. 577003
Disc speed ............................................................................................................................................ 1,725 RPM
Disc diameter ................................................................................................................................................... 8 in.
Belt size ............................................................................................................................................ 1 W x 42 L in.
Belt speed ........................................................................................................................................... 3,000 SFPM
Disc table size .......................................................................................................................................... 4 x 10 in.
Table slots ..................................................................................................................................................... 5/8 in.
Disc table tilt .......................................................................................................................................... 45 deg. out
Motor ..................................................................................... 1/3HP (0.25kW) 115VAC 1PH 60Hz 1725 RPM, 6A
Overall dimensions .................................................................................................................. 21L x 22W x 14H in.
Net weight ....................................................................................................................................................... 62 lb
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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