Craftsman 137242750 Owner’s Manual
Operator's Manual
3 HP (Max. Developed)
10" Blade
4800 R.P.M.
COMPOUND
M_TER SAW
ModeJ No.
137.242750
CAUTION:
Before using this Miter Saw,
read this manual and follow
all its Safety Rules and
Operating Instructions
® Safety Instructions
o Installation
® Operation
e Maintenance
® Parts List
Customer HeJp Line
!-800_843°!682
Sears, Roebuck and Co., Hoffman Estates, BL60179 U.S.A.
Visit our Craftsman website: www.sears.comfcraftsrnan
Pa_ No. 13724275001
SECTION PAGE
Warranty ........................................ 2
Product Specifications ....................... 2
Power Tool Safety ............................ 3
Compound Miter Saw Safety ............... 4
Electrical Requirements and Safety ...... 5
Accessories and Attachments .............. 6
Tools Needed For Assembly ................ 6
SECTION PAGE
Know Your Compound Miter Saw........ 8
Glossary of Terms ............................ 9
Assembly and Adjustments ................. 10
Operation ....................................... 16
Maintenance ................................... 23
Troubleshooting Guide ....................... 24
Parts List......................................... 25
Carton Contents ......... :.................... 7
FULL TWO YEARS WARRANTY
If this tool fails due to a defect in material or workmanship within two years of date of purchase, Sears will
at its option repair or replace it free of charge.
Return this tool to a Sears Service Center for repair, or to place of purchase for replacement.
This warranty gives you specific legal rights, and you may also have other rights which may vary from
state to state.
Sears, Roebuck and Co., Dept. 817 WA, Hoffman Estates, lL 60179
Some dust created by power sanding, sawing, grinding, drilling and other construction activities contains
chemicals known to the state of California to cause cancer, birth defects or other reproductive harm. Some
examples of these chemicals are:
Your risk from these exposures 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 dust
masks that are specially designed to filter out microscopic particles.
MOTOR
Power Source .....................
Horsepower ........................
Speed .................................
Brake ..................................
Double Insulated ....................
MITER SAW
Cutting Capacity:
Crosscut ............................
Miter 450 R. & L...................
Bevel 45° L.........................
45° Miter and 450 Bevel .........
To avoid electrical hazards, fire hazards or damage to the tool, use proper circuit protection.
This tool is wired at the factory for tt0-120 Volt operation. It must be connected to a tt0-t20 Volt / 1,'3Ampere time
deJay fuse or circuit breaker. To avoid shock or fire, replace power cord immediately if it is worn, cut or damaged
in any way.
Before using your tool, it is critical that you read and understand these safety rules. Failure to follow these rules
could result in serious injury to you or damage to the tool.
Lead from lead-based paints
• Crystalline silica from bricks, cement and other masonry products
Arsenic and chromium from chemically treated lumber
Rotating Table:
120 V AC, 60HZ, 15 Amp
3HP (Max. Developed)
4800 RPM (No load)
Electric
Yes
2-5/8" x 5-1t2"
2-5/8" x 3-1/2"
1_1/2" x 5-112"
1-1/2" x 3-1t2"
Diameter .............................. 12-5/8"
Miter Detent Stops .................. 0, 15, 22-1t2, 31.6,
Bevel Positive Stops ............... 0, 45°
Base Dimensions ................... 19-7t8" x 16-3/8"
Dust Collection ...................... Yes
Extension Wings .................... Yes
Net Weight ........................... 28.6 Lbs
2 !i
45° R.& L.
GENERAL SAFETY INSTRUCTIONS
BEFORE UStNG THE MITER SAW
Safety is a combination of common sense, staying alert
and knowing how to use your miter saw.
To avoid mistakes that could cause serious injury, do
not plug the tool in until you have read and understood
the following.
1. READ and become familiar with the entire
Operator's Manual. LEARN the toors application,
limitations and possible hazards.
2. KEEP GUARDS IN PLACE and in working order.
. REMOVE ADJUSTING KEYS AND WRENCHES.
Form the habit Of checking to see that keys and
adjusting wrenches are removed from the tool
before turning ON.
4. KEEP WORK AREA CLEAN. Cluttered areas and
benches invite accidents,
5. DON'T USE IN DANGEROUS ENVIRONMENT,
Don't use power tools in damp locations, or expose
them to rain or snow. Keep work area welt lighted.
6. KEEP CHILDREN AWAY. All visitors and b.ystanders
should be kept a safe distance.from work area.
7. MAKE WORKSHOP CHILD PROOF with padlocks,
master switches, or by removing starter keys.
8. DON'T FORCE THE TOOL. It will do the job better
and safer at the rate for which it was designed.
9. USE THE RIGHT TOOL. Do not force toot or
attachment to do a job for which it was not designed.
10.USE PROPER EXTENSION CORD. 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 product will draw. An
undersized cord wilt result in a drop in line voltage
and in loss of power which will cause .the tool to
overheat. The table on page 5 shows the correct
size to use depending on cord length and nameplate
ampere rating. If in doubt, use the next heavier
gauge. The smaller the gauge number, the heavier
the cord.
! 1.WEAR PROPER APPAREL. Do not wear loose
clothing, gloves, neckties, rings, bracelets, or other
jewelry which may get caught in moving parts.
Nonslip footwear is recommended. Wear protective
hair covering to contain long hair.
12.ALWAYS WEAR EYE PROTECTION. Any power
tool can throw foreign objects into the eyes and
could cause permanent eye damage.
_"*"Y°u"..... ALWAYS wear Safety Goggles (not
glasses) that comply with ANSI Safety
standard Z87.1 Everyday eyeglasses
have only impact-resistance lenses.
They ARE NOT safety glasses. Safety Goggles are
available at Sears. NOTE: Glasses or goggJes not in
compliance with ANSI Z87.1 could cause serious
injury when they break.
13.WEAR A FACE MASK OR DUST MASK. Sawing
operation produces dust.
14.SECURE WORK. Use clamps or a vise to hold work
When practical, it's safer than using your hand and it
frees both hands to operate toot.
15.DISCONNECT TOOLS before servicing, and when
changing accessories such as blades, bits and
cutters.
!&REDUCE THE RISK OF UNINTENTIONAL
STARTING. Make sure switch is in OFF position
before plugging in,
17.USE RECOMMENDED ACCESSORIES. Consult
this Operator's Manual for recommended
accessories, The use of improper accessories may
cause risk of injury to yourself or others.
IS.NEVER STAND ON TOOL. Serious injury could
occur if the tool is tipped or if the cutting tool is
unintentionally contacted.
19.CHECK FOR DAIVlAGED PARTS, Before further
use of the tool, a guard or other part that is
damaged should be carefully checked to determine
that it wilt 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.
20.NEVER LEAVE TOOL RUNNING UNATTENDED.
TURN POWER "OFF". Don't leave tool until it
comes to a complete stop
2!,DON'T OVERREACH. Keep proper footing and
balance at all times.
22.1VlAINTA1NTOOLS WITH CARE. Keep tools sharp
and clean for best and safest performance, Follow
instructions for lubricating and changing
accessories.
3
• • • • _:• • _ • _ • _ •••.-_•. • • • • • • •::/:: .::: _:_,•::v ¸
POWER TOOL SAFETY - cont'd
Dust generated from certain materials can be
hazardous to your health. Always operate saw in
welt-ventilated area and provide for proper dust
removal.
SPECIFIC SAFETY INSTRUCTIONS FOR
THiS MITER SAW
1. USE ONLY CROSS-CUTTING SAW BLADES.
When using carbide tipped blades, make sure they
have a negative hook angle. Do not use blades with
deep gullets as they can deflect and contact guard.
2. DO NOT operate the miter saw until it is completely
assembled and installed according to these
instructions.
3. IF YOU ARE NOT thoroughly familiar with the
operation of miter saws, seek guidance from a
supervisor, instructor, or other qualified person.
4.
ALWAYS hold the work firmly against the fence and
table. DO NOT perform any operation free hand.
.
KEEP HANDS out of the path of the saw blade. If
the workpiece you are cutting would cause your
hands to be within 621/2 '' inches of the saw blade,
the workpiece should be clamped in place before
making the cut.
BE SURE the blade is sharp, runs freely, and is free
.
of vibration.
7. ALLOW the motor to come up to fun speed before
starting 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 blade and collar are clean and that the
arbor screw is tightened securely.
!1.USE only blade collars specified for your saw.
12. NEVER use blades larger or smaller in diameter
than 10 inches.
13.
NEVER apply lubricants to the blade when it is
running.
I4.
ALWAYS check the blade for cracks or damage
before operation. Replace a cracked or damaged
blade immediately_
!5. NEVER use blades recommended for operation at
less than 4800 RPM
!6. USE the blade guards at all times.
17,ALWAYS keep the blade guards in place.
18.NEVER reach around the saw blade.
19.MAKE SURE the blade is not contacting the
workpiece before the switch is turned ON.
20,NEVER unplug the saw with the switch in the ON
position.
21.IMPORTANT: After completing the cut, release the
power switch and wait for the blade to stop before
returning the saw to the raised position.
22.1VlAKE 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.
23.NEVER cut ferrous metals or masonry with this tool.
24,NEVER cut smatl pieces.
25.PROVIDE adequate support to the sides of the saw
table for Iong work pieces.
26.NEVER use the miter saw in an area with flammable
liquids or gases.
27.NEVER use solvents to clean plastic parts. Solvents
could possibly dissolve or otherwise damage the
material.
28,SHUT OFF the power before servicing or adjusting
the too!.
29.DISCONNECT the saw from the power source and
clean the machine before leaving it,
30.MAKE SURE the work area is clean before leaving
the machine.
31. SHOULD any part of your miter saw be missing,
damaged, or fail in any way, or any electrical
component fail to perform properly, shut OFF the
switch and remove the plug from the power supply
outlet. Reptace missing, damaged, or faiIed parts
before resuming operation.
ELECTRICAL REQUIREMENTS
POWER SUPPLY AND MOTOR
SPECIFICATIONS
The AC motor used in this saw is a
nonreversible type. See MOTOR in the
SPECIFICATIONS section on page 2.
To avoid electrical hazards, fire hazards, or damage to
the tool, use proper circuit protection. Your saw is wired
at the factory for 120V operation. Connect to a I20V, !5
Amp circuit and use a 15 amp. time delay fuse or circuit
breaker. To avoid shock or fire, if power cord is worn or
cut, or damaged in any way, have it replaced
immediately.
universal,
PRODUCT
DOUBLE INSULATED []
The power tool is double insulated to provide a double
thickness of insulation between you and the tool's
electrical system, All exposed metal parts are isolated
from the internal metal motor components with protecting
insulation.
Replacement parts - When servicing use only identical
replacement parts.
Polarized plugs - This saw has a plug that looks iike
the one shown below:
il 'L2_2_i!r
I,q-h /
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. This tool is intended for
indoor use only_
MOTOR SAFETY PROTECTION
IMPORTANT."
To avoid motor damage, the motor shoutd be blown out
or vacuumed frequently to keep sawdust from interfering
with the motor ventilation.
1.Connect this saw to a 120V, 15 amp. circuit with a 15
amp. time delay fuse or circuit breaker. Using the
wrong size fuse can damage the motor.
2. If the motor won't start, release the trigger switch
immediately. Unplug the saw. Check the saw blade to
make sure it turns freely. If the blade is free, try. to start
the saw again. If the motor still does not start, refer to
the TROUBLESHOOTING GUIDE.
3. If the tool suddenly stalls while cutting wood, release
the trigger switch, unplug the tool, and free the blade
from the wood. The saw may now be started and the
cut finished.
4. FUSES may "blow" or circuit breakers may trip
frequently if:
a. MOTOR is overloaded - overloading can occur if
you feed too rapidly or make too many start/stops
in a short time.
b. LINE VOLTAGE is more than 10% above or below
the nameplate voltage rating. For heavy !oads,
however, the voltage at motor terminals must equal
the voltage specified on the nameplate.
c. IMPROPER or dull saw blades are used.
5. Most motor troubles may be traced to loose or
incorrect connections, overload, tow voltage or
inadequate power supply wiring. Always check the
connections, the load and supply circuit if the motor
doesn't run well. Check minimum gauge for the length
of cord you are"using on the chart below.
GUIDELINES FOR EXTENSION CORDS
Use proper extension cord. Make sure your extensiorh
cord is in good condition. When using an extension cord,
be sure to use one heavy enough to carry the current
your product will draw. An undersized cord will cause a
drop in line voltage, resulting in loss of power and cause
overheating. The table below shows the correct size to
use depending on cord length and nameplate ampere
rating. If in doubL use the next heavier gauge. The
smaller the gauge number, the heavier the cord.
Be sure your extension cord is properly wired and in
good condition. Atways replace a damaged extension
cord or have it repaired by a qualified person before
using it. Protect your extension cords from sharp objects,
excessive heat and damp or wet areas.
Use a separate electrical circuit for your tools, This
circuit must not be less than # 12 wire and should be
protected with a 15 Amp time delay fuse. Before
connecting the tool to the power line, make sure the
switch is in the OFF position and the electric current is
rated the same as the current stamped on the motor
nameplate, running at a lower voltage will damage the
motor.
i
(When using 120 volts onty)
Ampere Rating Total length of cord in feet
more than not more than / 25' 50' 100' 150'
0 6 ] 18' 16' 16' t4' "_
6 10 _: t6' 14' 12'
10 12 J 16' - 16' 14' 12'
t2 16 I !4' 12' not recommended
t
CAUTION: in all cases make certain the receptacle in
question is properly grounded. If you are not sure have a
certified electrician, check the receptacle.
RECOMMENDED ACCESSORIES
¢ Use only accessories recommended for this miter
saw. Follow instructions that accompany accessories.
Use of improper accessories may cause hazards,
€ The use of any cutting tool except I0 inch saw
blades which meet the requirements under
recommended accessories is prohibited. Do not use
accessories such as shaper cutters or dado sets.
Ferrous metal cutting and the use of abrasive wheels
is prohibited.
¢ Do not attempt to modify this tool or create
accessories not recommended for use with this toot.
Any such alteration or modification is misuse and
could result in a hazardous condition leading to
possible serious injury.
ACCESSORWES
Visit your Sears Hardware Department or see the Sears
Power and Hand Tool Catalog to purchase
recommended accessories for this power tool.
Blade wrench (supplied)
Phillipsscrewdriver
Slotted screwdriver
COMBnNATJON SQUARE MUST BE TRUE
Draw light ,-,
line on board , ,, /_
along this edge. /- _'
Adjustable wrench
Hex Key 2.5 ram. _"_
Combination square
hStraight edge or
board 3/4" thick
is edge must be
perfectly straight
UNPACKING YOUR MITER SAW
To avoid injury from unexpected starting or electrical
shock, do not plug the power cord into a source of power
during unpacking and assembly. This cord must remain
unplugged whenever you are working on the saw.
t, Remove the miter saw from the carton.
IMPORTANT: Do not lift the miter saw by the switch
handle or miter table handle. It may cause
misalignment. ALWAYS LIFT THE MACHINE BY
THE BASE HAND HOLDS.
.
Place the saw on a secure stationary work surface.
3.
Separate all parts from the packing material. Check
each one with the illustration to make certain all
items are accounted for, before discarding any
packing material.
tf any part is missing or damaged, do not attempt to
assemble the miter saw, or plug in the power cord until
the missing or damaged part is correctly replaced. To
avoid electric shock, use only identical replacement parts
when servicing double insulated tools.
To avoid the risk of personal injury, do not modify this
power toot or use accessories not recommended by
Sears.
Read warnings and conditions on your CARBIDE
TIPPED SAW BLADE. Do not operate the saw without
the proper saw blade guard in place. Carbide is a very
hard but brittle material. Care should be taken while
mounting, using, and storing carbide tipped blades to
prevent accidental damage. Slight shocks, such as
striking the tip while handling, can seriously damage the
blade. Foreign objects in the workpiece, such as wire or
nails, can also cause tips to crack or break off. Before
using, always visually examine the blade and tips for
bent blade, cracks, breakage, missing or loose tips, or
other damage. Do not use if damage is suspected.
Failure to heed safety instructions and warnings can
result in serious bodily iniury.
t
Should be no gap or overlap
when square is flipped over
in dotted position
Dust Collect
Elbow
Screws
Left & Right Miter Table
Extension Wings Handle
G
Blade
Wrench Dust Bag
Crown molding vise
assembly
6 7
Hold-down Ctamp
Lock-OFF Button
ON / OFF Switch
Arbor Lock
Hold Down Clamp
Left Extension Wing
Bevel Lock
Upper BEadeGuard
Cover Plate
Fence Extension
Fence
Extension Wing Mounting _"_" Miter Spring Quick-
Holes Lock Table Lock
Hand Hold
Miter Sca_e
Base
BeveFScale
Cutting Head Handle
Handle Locking Lever
Dust Bag
Stop Latch
Pivot Adjusting Nut
Stop Block
\
Right Extension Wing
Lower Blade Guard
Saw Blade
Miter Handle
CRAFTSMAN COMPOUND MINTERSAW TERMS
ARBOR LOCK - Allows the user to keep the blade from
rotating while tightening or loosening the arbor screw
during blade replacement or removal.
BASE - Supports the table, holds accessories and
allows for workbench or leg set mounting.
BEVEL LOCKING HANDLE - Locks the miter saw at a
desired bevel angle.
BEVEL SCALE - To measure the bevel angle of the saw
blade 0° to 45 ° left.
COVER PLATE SCREW - Loosen this screw and rotate
the plate for access to the blade arbor screw.
DUST CHUTE - Exhausts debris away from the user.
EXTENSION WiNG - Extend the width of the work table
for support while cutting long work pieces. They can be
used with or without a stop block as an additional side
fence.
FENCE - Helps to keep the workpiece from moving
when sawing. Scaled to assist with accurate cutting.
HAND HOLD - For moving the saw when unplugged.
LOCK-OFF SLIDE SWITCH - Must be pushed forward
to activate the trigger switch.
LOWER BLADE GUARD - Helps protect your hands
from the blade in the raised position, it retracts as the
blade is lowered.
MITER HANDLE - Use to lock and unlock the miter table,
and to rotate the saw to a right or left cutting position.
MITER SCALE - To measure the miter angle 0 ° to 45°
left, 0 ° to 45 ° right.
MITER SPRING LOCK -With the miter handle, locks the
miter saw at a preset positive stop for the desired miter
angle.
MOUNTING HOLES -To mount the miter saw to a
stable surface.
ON/OFF TRIGGER SWJlTCH -To prevent the trigger
from being accidentally engaged, a lock-off slide switch is
provided. To start the tool, push the lock-off slide switch
forward and squeeze the trigger. Release the trigger to
stop the miter saw.
STOP LATCH - Locks the miter saw in the lowered
position for compact storage and carrying.
SWmTCHHANDLE -The cutting head handle contains
the trigger switch and a lock-off slide switch. The blade is
lowered into the workpiece by pushing down on the
handle. The saw wildreturn to its upright position when
the handle is released.
WARNING LABEL - Read for your own safety.
WRENCH STORAGE - Convenient storage to prevent
misplacing the blade wrench.
WOODWORKING TERMS
ARBOR - The shaft on which a blade is mounted.
BEVEL CUT - Arhangle cut made through the face of the
workpiece.
COMPOUND CUT - A simultaneous bevel and miter cut.
CROSS CUT - A cut made across the width of the
workpiece.
FREEHAND - Performing a cut without using a fence
(guide), held down or other proper device to prevent the
workpiece from twisting during the cutting operation.
GUM - A sticky sap from wood products.
HEEL - Misatignment of the blade.
KERF - The amount of material removed by blade cut.
MITER CUT - An angle cut made across the width of the
workpiece.
RESIN - A sticky sap that has hardened.
REVOLUTIONS PER MINUTE (RPM) - The number of
turns completed by a spinning object in one minute.
SAW BLADE PATH - The area of the workpiece or table
top directly in line with the travel of the blade or the part
of the workpiece which will be cut.
SET - The distance between two saw blade tips, bent
outward in opposite directions to each other. The further
apart the tips are, the greater the set.
WORKP1ECE - The item being cut. The surfaces of a
workpiece are commonly referred to as faces, ends, and
edges.
8
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