JET 577000 User Manual

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Operating Instructions and Parts Manual

Square Wheel Belt Grinder

Models: J-4103, J-4126AC

Model J-4103

JET

427 New Sanford Road
LaVergne, Tennessee 37086 Part No. M-577000
Ph.: 800-274-6848 Revisi

.jett ools.com Copyright ©

www

Model J-4126AC

on B 02/2015

2015 JET

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 of th ese ma chines in the pr ocessing of metal, plast ics, or other m aterials may void the warran ty. 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 provi de proof
of initia l p u rch a s e when ca lling. 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 S tate Law A pplies

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 WARRANTI ES 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.

Table of Contents

Cover Page .........................................................................................................................................1

General Specifications.........................................................................................................................4

Operating Precautions .........................................................................................................................5

Setup and Operation............................................................................................................................7

Maintenance ......................................................................................................................................10

Wiring Diagrams ................................................................................................................................12

Replacement Parts ............................................................................................................................13

Troubleshooting.................................................................................................................................13

Accessories .......................................................................................................................................17

3

General Specifications

The JET Square Wheel Belt Grinder ,
Models J-4103 and J-4126AC, are designed
for grinding, deburring, chamfering, and
internal/external grinding of small and large
parts. The Square Wheel Belt Grinder can
be used to polish or buff finished parts and
grind small internal radii using available
accessories. Accessory changeover is
quick and easy . Belt tension and tracking
are easily adjustable.

The Square Wheel Belt Grinder is available
in either single speed (Model J-4103) or
variable speed model (Model J-4126AC).
The variable speed model is controlled by
an inverter that provides belt speeds
ranging from 0 to 6000 SFPM.

Model J-4103

Model J-4126AC

4

Specifications Model J-4103 Model J-4126AC

Stock Number 577000 577001
Belt Width & Length 2 x 72 Inches 2 x 72 inches
Belt S peed 4600 SFPM 0 - 6000 SFPM
Motor 1 HP , Single Phase, 1 HP, 1,750 rpm

1750 rpm
Contact Wheel Diameters 1-1/2, 3, & 8 inches 1-1/2, 3, & 8 inches
Weight 115-125 pounds 120 pounds

- Misuse of this machine can cause serious injury.

- For safety , machine must be set up, used and
serviced properly.

- Read, understand and follow instructions in the
operator’s and parts manual which was shipped with
your machine.

When setting up machine:

- Always avoid using machine in damp or poorly
lighted work areas.

- Always be sure machine is securely anchored to
the floor.

- Always keep machine guards in place.

- Always put start switch in OFF position before
plugging in machine.

When using machine:

- Never operate with machine 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 machine running while you are away
from it.

- Always shut off the machine when not in use.
When servicing machine:

- Always unplug machine from electrical power while
servicing.

- Always follow instructions in operators 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 safety.

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 absolutely
mandatory that those who use our products be
properly trained in how to use them correctly . They
should read and understand the Operators and Parts
Manual as well as all labels affixed to the machine.
Failure in following all of these warnings can cause
serious injuries.

Machinery general safety warnings

1. Always wear protective eye wear when operating
machinery . Eye wear shall be impact resist ant,
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
breakage of eye protection.

2. Wear proper apparel. No loose clothing or
jewelry which can get caught in moving parts.
Rubber soled footwear is recommended for best
footing.

3. Do not overreach. Failure to maintain proper
working position can cause you to fall into the
machine or cause your clothing to get caught
pulling you into the machine.

4. Keep guards in place and in proper working
order. Do not operate the machine with 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 being sure the start
switch is OFF before plugging in the machine.

7. Never leave the machine running while unattended.
Machine shall be shut off whenever it is not in
operation.

8. Disconnect electrical power before servicing.
Whenever changing accessories or general
maintenance is done on the machine, electrical
power to the machine must be disconnected
before work is done.

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. Machinery must be anchored to the floor.

1 1. Secure work. Use clamps or a vise to hold work,

when practical. It is safer than using your hands
and it frees both hands to operate the machine.

12. Never brush away chips while the machine is in
operation.

13. Keep work area clean. Cluttered areas invite
accidents.

14. Remove adjusting keys and wrenches before
turning machine on.

15. Use the right tool. Don’t force a tool or attachment
to do a job it was not designed for.

16. Use only recommended accessories and follow
manufacturers instructions pertaining to them.

5

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 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 hazards.

Wire sizes

General Electrical Cautions

This machine should be grounded in accordance with
the National Electrical Code and local codes and
ordinances. This work should be done by a qualified
electrician. The machine should be grounded to
protect the user from electrical shock.

AWG (American wire gauge) Number

Conductor Length 240 Volt Lines 120 Volt Lines
0 - 50 Feet No. 14 No. 14

50 - 100 Feet No. 14 No. 12
Over 100 Feet No. 14 No. 8

Caution: for circuits which are far away from the
electrical service box, the wire size must be in­creased 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:

Safety requirements for abrasive grinding machines

Abrasive grinding can be hazardous to operators and
bystanders. Grinding sparks, chips and dust par­ticles thrown off by the grinding disc can cause
serious injury by contact or inhalation. To avoid
such injuries you must comply with the following
safety requirements:

1. Always wear protective eyewear when operating
machinery. Eye wear shall be impact resistant,
protective safety glasses with side shields which
comply with ANSI Z87.1. Use of eye wear which
does not comply with ANSI Z87.1 specifications
could result in severe injury from breakage of
eye protection. See Figure A, below.

2. Wear leather safety gloves, arm guards, leather
aprons and safety shoes.

6

3. A dust collection system is recommended,
Operator shall also wear a dust mask at all
times. See Figure B, below.

4. Additional precautions may be necessary for
grinding materials which are flammable or have
other hazardous properties. You should always
consult the manufacturer of such materials for
instructions on grinding and handling.

5. Do not force or jamb the workpiece into the
grinding disc.

6. Before grinding, always allow the motor to come
up to operating speed, then check the grinding
disc for wobble, runout, or any unbalanced

A B C D

condition. If the disc is not operating accurately
and smoothly, immediately stop the motor and
make repairs before attempting any grinding
operations.

7. Abrasive discs must be stored in a controlled
environment area. Relative humidity should be
35% to 50% and the temperature should be
between 60 and 80 degrees Fahrenheit. Failure
to do so could cause premature disc failure.

8. Examine the face of the grinding disc carefully.
Excessive grinding which wears down to the
backing material can tear the disc. Never use a
disc which shows backing, nicks or cuts on the
surface or edge or damage due to creasing or
poor handling.

9. When installing a new disc, be certain the disc is
accurately centered on the drive wheel. Failure
to do so could cause a serious unbalanced
condition.

10. Always present the workpiece to the wheel while
resting the workpiece firmly on the table. Failure
to do so could result in damage to the workpiece
or throwing of the workpiece off the wheel.

11. Safety shoes which comply with ANSI Z41.1 shall
be worn. See Figure C.

12. Personal hearing protection such as ear plugs or
ear muffs shall be used to protect against the
effect of noise exposure. See Figure D: