Jet Bench JMS-12SCMS User manual

CUS
R
174315
Operating Instructions and Parts Manual
12" Sliding Dual Bevel Compound Miter Saw
Benchtop Series – Model No. JMS-12SCMS
For serial no. 10070329 and higher
WALTER MEIER (Manufacturing) Inc.
427 New Sanford Road
LaVergne, Tennessee 37086 Part No. M-707120
Ph.: 800-274-6848 Revision B 08/2010
www.waltermeier.com Copyright © 2010 Walter Meier (Manufacturing) Inc.

Warranty and Service
Walter Meier (Manufacturing) Inc., warrants every product it sells. If one of our tools needs service or repair, one of our
Authorized Service Centers located throughout the United States can give you quick service. In most cases, any of these
Walter Meier Authorized Service Centers can authorize warranty repair, assist you in obtaining parts, or perform routine
maintenance and major repair on your JET
® tools. For the name of an Authorized Service Center in your area call 1-800-274-
6848.
MORE INFORMATION
Walter Meier is consistently adding new products to the line. For complete, up-to-date product information, check with your
local Walter Meier distributor, or visit waltermeier.com.
WARRANTY
JET products carry a limited warranty which varies in duration based upon the product (MW stands for Metalworking, WW
stands for Woodworking).
WHAT IS COVERED?
This warranty covers any defects in workmanship or materials subject to the exceptions stated below. Cutting tools, abrasives
and other consumables are excluded from warranty coverage.
WHO IS COVERED?
This warranty covers only the initial purchaser of the product.
WHAT IS THE PERIOD OF COVERAGE?
The general JET warranty lasts for the time period specified in the product literature of each product.
WHAT IS NOT COVERED?
Three Year, Five Year and Lifetime Warranties do not cover products used for industrial or educational purposes. Products
with Three Year, Five Year or Lifetime Warranties that are used for industrial or education purposes revert to a One Year
Warranty. This warranty does not cover defects due directly or indirectly to misuse, abuse, negligence or accidents, normal
wear-and-tear, improper repair or alterations, or lack of maintenance.
HOW TO GET SERVICE
The product or part must be returned for examination, postage prepaid, to a location designated by us. For the name of the
location nearest you, please call 1-800-274-6848.
You must provide proof of initial purchase date and an explanation of the complaint must accompany the merchandise. If our
inspection discloses a defect, we will repair or replace the product, or refund the purchase price, at our option. We will return
the repaired product or replacement at our expense unless it is determined by us that there is no defect, or that the defect
resulted from causes not within the scope of our warranty in which case we will, at your direction, dispose of or return the
product. In the event you choose to have the product returned, you will be responsible for the shipping and handling costs of
the return.
HOW STATE LAW APPLIES
This warranty gives you specific legal rights; you may also have other rights which vary from state to state.
LIMITATIONS ON THIS WARRANTY
WALTER MEIER (MANUFACTURING) INC., LIMITS ALL IMPLIED WARRANTIES TO THE PERIOD OF THE LIMITED
WARRANTY FOR EACH PRODUCT. EXCEPT AS STATED HEREIN, ANY IMPLIED WARRANTIES OR
MERCHANTABILITY AND FITNESS ARE EXCLUDED. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG
THE IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.
WALTER MEIER 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.
Walter Meier sells through distributors only. The specifications in Walter Meier catalogs are given as general information and
are not binding. Members of Walter Meier reserve 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 Walter Meier.
2

Table of Contents
Warranty and Service................................................................................................................................2
Table of Contents .....................................................................................................................................3
Warnings..................................................................................................................................................5
Compound Miter Saw Safety.....................................................................................................................7
Introduction..............................................................................................................................................8
Specifications...........................................................................................................................................8
Cutting Capacity.......................................................................................................................................8
Electrical..................................................................................................................................................9
Power Supply and Motor Specifications ..................................................................................................9
Electrical Requirements.........................................................................................................................9
Extension Cords....................................................................................................................................9
Features ................................................................................................................................................10
Shipping Contents ..................................................................................................................................11
Contents of the Shipping Container ......................................................................................................11
Assembly...............................................................................................................................................12
Unlocking the Slide Carriage................................................................................................................12
Releasing the Cutting Head .................................................................................................................12
Unlocking ........................................................................................................................................12
Locking ...........................................................................................................................................12
Installing the Dust Bag.........................................................................................................................12
Installing the Safety Hold-downClamp..................................................................................................13
Power Cord Storage Clips....................................................................................................................13
Saw Blade Wrench..............................................................................................................................13
Table Inserts.......................................................................................................................................14
Mounting the Saw................................................................................................................................14
Installing Blade....................................................................................................................................15
Adjustments ...........................................................................................................................................16
Bevel Stop Adjustments.......................................................................................................................16
90°(0°) Bevel Adjustment..................................................................................................................16
Bevel Scale Indicators......................................................................................................................16
45° Left Bevel Positive Stop Adjustment............................................................................................16
45° Right Bevel Positive Stop Adjustment..........................................................................................17
33.9° Left & Right Bevel Adjustment..................................................................................................17
Miter Angle .........................................................................................................................................18
Miter Scale Indicator Adjustment.......................................................................................................18
Adjusting Fence Squareness................................................................................................................18
Positive Stop Miter Angle Adjustment ...................................................................................................19
Quick-cam Miter Table Lock Operation.................................................................................................19
Quick-cam Miter Table Lock Adjustment...............................................................................................19
Presetting the Cutting Depth ................................................................................................................20
Rear Support Bar................................................................................................................................20
Operation...............................................................................................................................................21
Starting a cut.......................................................................................................................................21
Finishing a cut.....................................................................................................................................21
Jammed Material.................................................................................................................................21
To Turn the Saw On............................................................................................................................21
Sliding Fence......................................................................................................................................22
Removing or Installing the Sliding Fence.................................................................................................22
Sliding Carriage System ......................................................................................................................22
Miter Cut.............................................................................................................................................23
Bevel Cut............................................................................................................................................23
33.9° Bevel Detent Pin for Crown Moldings...........................................................................................24
Compound Cuts..................................................................................................................................24
90º Crosscut – Narrow Boards.............................................................................................................24
Slide Cutting Wide Boards ...................................................................................................................25
Cutting Bowed Material........................................................................................................................26
Rough Cutting a Dado .........................................................................................................................26

4
Auxiliary Wood Fence..........................................................................................................................26
Cutting Base Molding...........................................................................................................................27
Bevel/Miter Settings.............................................................................................................................27
Removing the Blade ............................................................................................................................14
Laser Beam ........................................................................................................................................20
Changing the Belt................................................................................................................................26
Crown Molding....................................................................................................................................27
Crown Molding Chart ..............................................................................................................................28
Maintenance ..........................................................................................................................................29
Replacing Carbon Brushes ..................................................................................................................29
Lower Blade Guard..............................................................................................................................29
Saw Dust............................................................................................................................................29
Lubrication..........................................................................................................................................29
Troubleshooting – Motor .........................................................................................................................30
Troubleshooting – Operation ...................................................................................................................30
Parts......................................................................................................................................................31
Ordering Replacement Parts................................................................................................................31
Parts List............................................................................................................................................31
Assembly Drawing...............................................................................................................................36
Wiring Diagram.......................................................................................................................................39
The specifications in this manual are given as general information and are not binding. Walter Meier
(Manufacturing) Inc. reserves the right to effect, at any time and without prior notice, changes or alterations to
parts, fittings, and accessory equipment deemed necessary for any reason whatsoever.

5
Warnings
1. Read and understand the entire owners' 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 saw 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 compound miter saw, do not use until proper
training and knowledge have been obtained.
5. Do not use this saw for other than its intended use. If used for other purposes, Walter Meier
(Manufacturing) Inc., 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 miter saw. Everyday eyeglasses
only have impact resistant lenses; they are not safety glasses.
7. Before operating this saw, 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 this machine is firmly secured to the floor or bench 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.
20. Don't use in dangerous environment. Don't use power tools in damp or wet locations, or expose them
to rain. Keep work area well lighted.
21. Keep visitors a safe distance from the work area. Keep children away.
22. Make your workshop child proof with padlocks, master switches or by removing starter keys.

6
23. Give your work undivided attention. Looking around, carrying on a conversation and “horse-play” are
careless acts that can result in serious injury.
24. Maintain a balanced stance at all times so that you do not fall or lean against the blade or other
moving parts. Do not overreach or use excessive force to perform any machine operation.
25. 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.
26. Use recommended accessories; improper accessories may be hazardous.
27. Maintain tools with care. Keep saw blades sharp and clean for the best and safest performance.
Follow instructions for lubricating and changing accessories.
28. Disconnect tools before servicing and when changing accessories such as blades.
29. Make sure the work piece is securely attached or clamped to the table.
30. Turn off the machine before cleaning. Use a brush or compressed air to remove chips or debris — do
not use your hands.
31. Do not stand on the machine. Serious injury could occur if the machine tips over.
32. Never leave the machine running unattended. Turn the power off and do not leave the machine until it
comes to a complete stop.
33. 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.

7
Compound Miter Saw Safety
Specific safety instructions for this compound miter saw
1. Do not operate the miter saw until it is completely assembled and installed according to these
instructions.
2. If you are not thoroughly familiar with the operation of miter saws, seek guidance from your
supervisor, instructor or other qualified person.
3. Always hold the work firmly against the fence and table.
4. Do not perform any operation free hand (use clamp wherever possible).
5. Keep hands out of the path of the saw blade. If the workpiece you are cutting would cause your
hands to be within 8-3/4 in. of the saw blade, the workpiece should be clamped in place before
making the cut.
6. Be sure the blade is sharp, runs freely and is free of vibration.
7. Allow the motor to come up to full speed before starting a cut.
8. Keep the motor air slots clean and free of chips or dust.
9. Always make sure all handles are tight before cutting, even if the table is positioned in one of the
positive stops.
10. Be sure both the blade and the collar are clean and the arbor bolt is tightened securely.
11. Use only blade collars specified for your saw.
12. Never use blades larger in diameter than 12 inches.
13. Never apply lubricants to the blade when it is running.
14. Always check the blade for cracks or damage before operation. Replace a cracked or damaged blade
immediately.
15. Never use blades recommended for operation at less than 4200 RPM.
16. Always keep the blade guards in place and use at all times.
17. Never reach around the saw blade.
18. Make sure the blade is not contacting the workpiece before the switch is turned ON.
19. Important: After completing the cut, release the trigger and wait for the blade to stop before returning
the saw to the raised position.
20. Make sure the blade has come to a complete stop before removing or securing the workpiece,
changing the workpiece angle or changing the angle of the blade.
21. Never cut metals or masonry products with this tool. This miter saw is designed for use on wood and
wood-like products.
22. Never cut small pieces. If the workpiece being cut would cause your hand or fingers to be within 8-3/4
in. of the saw blade the workpiece is too small.
23. Provide adequate support to the sides of the saw table for long work pieces.
24. Never use the miter saw in an area with flammable liquids or gases.
25. Never use solvents to clean plastic parts. Solvents could possibly dissolve or otherwise damage the material.
26. Shut off the power before servicing or adjusting the tool.
27. Disconnect the saw from the power source and clean the machine when finished using.
28. Make sure the work area is clean before leaving the machine.
29. Should any part of your miter saw be missing, damaged, or fail in any way, or any electrical
component fail to perform properly, lock the switch and remove the plug from the power supply outlet.
Replace missing, damaged, or failed parts before resuming operation.

8
Introduction
This manual is provided by Walter Meier (Manufacturing) Inc., covering the safe operation and
maintenance procedures for the JET Model JMS-12SCMS Dual Bevel Sliding Compound Miter Saw with
laser. 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 years of trouble free 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 Walter Meier. Walter
Meier can also be reached at our web site: www.waltermeier.com.
Specifications
Model Number................................................................................................................ JMS-12SCMS
Stock Number .......................................................................................................................... 707120
Motor......................................................................................................................... 120V, 60Hz, 15A
No Load Speed (Arbor)..........................................................................................................4200RPM
Motor Arbor Shaft Size....................................................................................................................5/8"
Blade............................................................................................................... 12", 60T, carbide tipped
Blade Arbor Size......................................................................................................1" with5/8" reducer
Miter Stops................................................................................................................. ten at -45° to 60°
Bevel Stops...................................................................................................0°, 33.9°, 45° left and right
Base Dimensions.........................................................................................................37-1/2” x 26-1/4”
Net Weight.................................................................................................................................. 72 lb.
The above specifications were current at the time this manual was published, but because of our policy of
continuous improvement, Walter Meier (Manufacturing) Inc., reserves the right to change specifications at
any time and without prior notice, without incurring obligations.
Cutting Capacity
Cut Type Miter Angle Bevel Angle Cutting Capacity
Cross Cut 0º 0º 4" x 12-1/4"
Miter 45º Right & Left 0º 4" x 8-3/4"
Miter 60º Right 0º 4" x 6-1/4"
Bevel 0º 45º Left 2-1/2" x 12-1/4"
Bevel 0º 45º Right 1-3/4" x 12-1/4"
Compound Cut 45º Right & Left 45º Left 2-1/2" x 8-3/4"
Compound Cut 45º Right & Left 45º Right 1-3/4" x 8-3/4"
Compound Cut 60º Right 45º Right 1-3/4" x 6-1/4"
Vertical Capacity (Baseboard) 0º 0º 5-1/2"
Read and understand the entire contents of this manual before attempting
assembly or operation! Failure to comply may cause serious injury!

9
Electrical
Power Supply and Motor
Specifications
The AC motor used in this saw is a universal,
nonreversible type (see Motor in the Specifica-
tions section on page 8).
To avoid electrical hazards,
fire hazards, or damage to the machine, use
proper circuit protection. Your saw is wired
at the factory for 120V operation. Connect to
a 120V, 15 Amp circuit and use a 15 amp time
delay fuse or circuit breaker. If power cord is
worn or cut, or damaged in any way, have it
replaced immediately to avoid shock or fire.
Electrical Requirements
This machine is double insulated to provide a
double thickness of insulation between the user
and the machine's electrical system. All exposed
metal parts are isolated from the internal metal
motor components with protective insulation.
This saw has a plug that looks like the one
shown in Figure A.
Figure A
To reduce the risk of electrical shock, this saw
has a polarized plug (one blade is wider than the
other). This plug will fit in a polarized outlet only
one way; if the plug does not fit fully in the outlet,
reverse the plug. If it still does not fit, contact a
qualified electrician to install the proper outlet.
Do not change the plug in any way.
Double insulation does not take the place of
normal safety precautions when operating this
tool.
To avoid electrocution:
1. Use only identical replacement parts when
servicing a tool with double insulation.
Servicing should be performed by a qualified
technician.
2. Do not use power tools in wet or damp
locations or expose them to rain or snow.
Extension Cords
Make sure your extension cord is in good
condition. When using an extension cord, be
sure to use one heavy enough to carry the
current your machine will draw. An undersized
cord will cause a drop in the line voltage
resulting in power loss and overheating. The
table below shows the correct size to use
depending on the cord length and nameplate
ampere rating. If in doubt, use the next heavier
gauge. Remember, the smaller the gauge
number, the heavier the cord.
Cord Length AWG
00 – 25ft 016
25 – 50ft 014
Important: Make certain the receptacle in
question is properly grounded. If you are not
sure, have a registered electrician check the
receptacle.

10
Features