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Operating Instructions and Parts Manual
Disc, Belt and Combination Disc/Belt Sanders
Models: J-4200A
J-4200A-2
J-4300A
J-4301A
J-4400A
J-4401A
J-4202A
J-4200A Disc/Belt Sander
J-4300A Belt Sander
J-4400A Disc Sander
WALTER MEIER (Manufacturing) Inc.
427 New Sanford Road
LaVergne, Tennessee 37086
Ph.: 800-274-6848
Part No. M-414551
Revision B1 01/2013
Copyright © 2013 Walter Meier (Manufacturing) Inc.
2.0 Table of contents
Section
Page
1.0 Warranty and Service.....................................................................................................................................2
2.0 Table of contents............................................................................................................................................3
3.0 Safety Warnings.............................................................................................................................................4
4.0 Machine and Manual Overview......................................................................................................................6
5.0 Specifications.................................................................................................................................................7
6.0 Operating instructions ....................................................................................................................................8
6.1 Belt sander....................................................................................................................................8
6.2 Adjusting the belt sander table.......................................................................................................8
6.3 Using the indexing lock handle ......................................................................................................8
6.4 Adjusting the belt sander arm ........................................................................................................8
6.5 Adjusting disc sander table............................................................................................................9
6.6 Use of the Miter Gauge .................................................................................................................9
7.0 Maintenance.................................................................................................................................................10
7.1 Belt replacement .........................................................................................................................10
7.2 Track mechanism maintenance...................................................................................................10
7.3 Installing abrasive discs...............................................................................................................11
7.4 Replacing the v-belt.....................................................................................................................11
8.0 Machine setup..............................................................................................................................................13
8.1 Basic setup .................................................................................................................................13
8.2 Disc table angle adjustment.........................................................................................................13
8.3 Disc table miter parallelism adjustment........................................................................................13
8.4 Disc table gap adjustment ...........................................................................................................14
8.5 Belt table miter slot parallelism adjustment ..................................................................................14
8.6 Belt table angle adjustment .........................................................................................................14
8.7 Adjusting or replacing the platen..................................................................................................15
9.0 Electrical connections ..................................................................................................................................15
9.1 Single phase electrical hookup ....................................................................................................16
9.2 Three phase electrical hookup.....................................................................................................16
10.0 Troubleshooting .........................................................................................................................................17
11.0 Replacement parts.....................................................................................................................................18
11.1.1 Model J-4200A Belt and Disc Sander Assembly – Exploded View...........................................18
11.1.2 Model J-4200A Belt and Disc Sander Assembly – Parts List ...................................................19
11.2.1 Model J-4300A Belt Sander Assembly – Exploded View .........................................................21
11.2.2 Model J-4300A Belt Sander Assembly – Parts List..................................................................22
11.3.1 Model J-4400A Disc Sander Assembly – Exploded View ........................................................24
11.3.2 Model J-4400A Disc Sander Assembly – Parts List.................................................................25
11.4.1 Base Assembly: All 1 Phase Models – Exploded View............................................................26
11.4.2 Base Assembly: All 1 Phase Models – Parts List.....................................................................27
11.5.1 Base Assembly: All 3 Phase Models – Exploded View............................................................28
11.5.2 Base Assembly: All 3 Phase Models – Parts List.....................................................................29
12.1 Electrical schematic – single phase ...........................................................................................................30
12.2 Electrical schematic – 3 phase...................................................................................................................31
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General Machinery Warnings
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.
3.0 Safety Warnings
General Cautions
- Misuse of this machine can cause serious injury.
2. Wear proper apparel. No loose clothing or jewelry
which can get caught in moving parts. Rubber
soled, nonslip, footwear is recommended for best
footing.
- For safety, the machine must be set up, used and
serviced properly.
- Read, understand and follow the instructions in the
operator’s and parts manual which was shipped
with your machine.
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 caught —
pulling you into the machine.
When setting up the machine:
- Always avoid using the machine in damp or poorly
lighted work areas.
4. Keep the guards in place and in proper working
order. Do not operate the machine with the
guards removed.
- Always be sure the machine is securely anchored to
the floor.
5. Avoid dangerous working environments. Do not
use stationary machine tools in wet or damp
locations. Keep work areas clean and well lit.
- Always keep the machine guards in place.
- Always put the start switch in the “OFF” position
before plugging in the machine.
6. Special electrical precautions should be taken
when working on flammable materials.
When using the machine:
7. Avoid accidental starts by being sure that the
start switch is in the “OFF” position before
plugging in the machine.
- Never operate the machine with safety guards
missing.
- Always wear safety glasses with side shields (See
ANSI Z87.1)
8. Never leave the machine running while
unattended. The machine shall be shut off
whenever it is not being used.
- Never wear loose clothing or jewelry.
- Never overreach; you may slip and fall into the
machine.
9. Disconnect the electrical power before servicing,
whenever changing accessories or when general
maintenance is done on the machine.
- Never leave the machine running while unattended.
- Always shut the machine off when not in use.
When servicing the machine:
10. 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.
- Always unplug the machine from the electrical
power before servicing.
- Always follow the instructions in the operators and
parts manual when changing accessory tools or
parts.
11. If there is any risk of tipping or sliding, the
machinery must be anchored to the floor.
12. 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.
- Never modify the machine without consulting
Walter Meier (Manufacturing) Inc.
You — the stationary power tool user — hold the key
to safety.
13. Never brush chips away while the machine is in
operation.
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.
14. Keep work area clean. Cluttered areas invite
accidents.
15. Remove adjusting keys and wrenches before
turning the machine on.
16. Use the right tool. Don’t force
a
tool or
attachment to do a job it was not designed for.
17. Use only recommended accessories and follow
manufacturer’s instructions pertaining to them.
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18. Keep hands in sight and clear of all moving parts
and cutting surfaces.
other hazardous properties. You should always
consult the manufacturer of such materials for
instructions on sanding and handling.
19. 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.
5. Do not force or jam the workpiece into the
sanding disc.
6. Before sanding, always allow the motor to come
up to operating speed, then check the sanding
disc for wobble, run-out, or any unbalanced
condition. If the disc is not operating accurately
and smoothly, immediately stop the motor and
make repairs before attempting any sanding
operations.
20. Know the tool you are using; its application,
limitations, and potential hazards.
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.
7. Abrasive discs must be stored in a controlled
environment . Relative humidity should be 35% to
50% and the temperature should be between 60°
and 80° Fahrenheit. Failure to do so could cause
premature disc failure.
Wire Sizes
8. Examine the face of the sanding disc carefully.
Excessive sanding that 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.
Caution: For circuits that are a great distance 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:
9. When installing a new disc, be certain the disc is
accurately centered on the drive wheel. Failure to
do so could cause
condition.
a
serious unbalanced
Conductor AWG (American Wire Gauge) number
length
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.
240 volt lines
No. 14
120 volt lines
No. 14
0-50 feet
50-100 feet
Over 100 feet
No. 14
No. 12
No. 12
No. 8
11. Safety shoes which comply with ANSI Z41.1
should be worn.
Safety Requirements for Abrasive Sanding
Machines
12. Personal hearing protection such as ear plugs or
ear muffs should be used to protect against the
effect of noise exposure.
Abrasive sanding can be hazardous to operators and
bystanders. Sanding sparks, chips and dust particles
thrown off by the sanding disc can cause serious
injury if contacted or inhaled. 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,
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 the breakage of the
eye protection.
2. Wear leather safety gloves, arm guards, leather
aprons and safety shoes.
3. A dust collection system is recommended. The
operator should also wear a dust mask at all
times.
4. Additional precautions may be necessary for
sanding materials which are flammable or have
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4.0 Machine and Manual Overview
JET Abrasive Finishing Machines are available in three different configurations: disc, belt, and combination disc and
belt. Each configuration is a rugged, heavy-duty machine designed for maximum high production work in an industrial
environment.
The speed of stock removal and the quality of finish achieved is determined largely by the aggressiveness of the
abrasive disc or belt mounted on the machine. With very aggressive grits, these machines are typically considered
grinding machines. With very fine grits, these machines are typically considered sanding machines. Whatever you
call them, and however you use them, the instructions in this manual will help you use them safely and productively.
You will note there are several types of electrical systems available for these machines. All of these systems are
equally effective in providing power to the grinding mechanism – however, local codes and the type of environment in
which the machine is used will often be a factor in your choice of system.
Instructions in this manual assume that you are using one of the Model J-4200A Series Belt and Disc machines. If
you have a disc only, or belt only machine, you can bypass those instructions which do not apply to you.
If there are questions or comments, please contact your local supplier or Walter Meier. Walter Meier can also be
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 attempting assembly or
operation! Failure to comply may cause serious injury!
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