3915
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3915
Operating/Safety Instructions
Consignes de fonctionnement/sécurité
Instrucciones de funcionamiento y seguridad
Consumer Information
Renseignement des consommateurs
Información para el consumidor
Toll Free Number: Appel gratuit : Número de teléfono gratuito:
1-877-BOSCH99 (1-877-267-2499) http://www.boschtools.com
IMPORTANT: IMPORTANT : IMPORTANTE:
Read Before Using Lire avant usage Leer antes de usar
General Safety Rules
For Bench Top Tools
Work Area
● Keep work area clean and well lit. Cluttered
benches and dark areas invite accidents.
● Do not operate power tools in explosive
atmospheres, such as in the presence of
flammable liquids, gases or dust. Power
tools create sparks which may ignite the dust or
fumes.
● Keep bystanders, children and visitors away
while operating a power tool. Distractions
can cause you to lose control.
● Store idle tools out of reach of children and
other untrained persons. Tools are dangerous in the hands of untrained users.
● Do not leave tool running unattended, turn
power off. Do not leave tool until it comes to a
complete stop.
● MAKE WORKSHOP CHILDPROOF with pad
lock, master switches, or by removing starter
keys.
Electrical Safety
● Before plugging in the tool, be certain the
outlet voltage supplied is compatible with
the voltage marked on the nameplate within
10%. An outlet voltage incompatible with that
specified on the nameplate can result in serious
hazards and damage to the tool.
● Double insulated tools are equipped with 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 a polarized outlet. Do not change the
plug in any way. Double insulation eliminates
the need for the three wire grounded power cord
and grounded power supply.
● Avoid body contact with grounded surfaces
such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric
shock if your body is grounded.
● Do not expose power tools to rain or wet
conditions. Water entering a power tool will
increase the risk of electric shock.
● Do not abuse the cord. Never use the cord
to carry the tools or pull the plug from an
outlet. Keep cord away from heat, oil, sharp
edges or moving parts. Replace damaged
cords immediately. Damaged cords increase
the risk of electric shock.
● When operating a power tool outside, use an
outdoor extension cord marked “W-A” or
“W”. These cords are rated for outdoor use and
reduce the risk of electric shock.
Personal Safety
● Stay alert, watch what you are doing and use
common sense when operating a power
tool. A moment of inattention or use of drugs,
alcohol or medication while operating power
tools can be dangerous.
● Dress properly. Do not wear loose clothing
or jewelry. Contain long hair. Keep your
hair, clothing and gloves away from moving
parts. Loose clothes, jewelry or long hair can be
caught in moving parts. Roll long sleeves
above elbows. Rubber gloves and non-skid
footwear are recommended when working outdoors.
● Avoid accidental starting. Be sure switch is
“OFF” before plugging in. Carrying tools with
your finger on the switch or plugging in tools
that have the switch “ON” invites accidents.
● Remove adjusting keys or wrenches before
turning the tool “ON”. A wrench or a key that
is left attached to a rotating part of the tool will
be thrown.
● Do not overreach, keep proper footing and
balance at all times. Proper footing and balance enables better control of the tool in unexpected situations.
● Do not stand on tool or its stand. Serious
injury may occur if the tool is tipped or if the cutting tool is accidentally contacted. Do not store
materials on or near the tool such that it is necessary to stand on the tool or its stand to reach
them.
2.
Safety
“READ ALL INSTRUCTIONS” — Failure to follow the SAFETY RULES identified by
BULLET (●) symbol listed BELOW and other safety precautions, may result in serious person-
al injury.
“SAVE THESE INSTRUCTIONS”
WARNING
!
3.
“SAVE THESE INSTRUCTIONS”
● Use safety equipment. Always wear safety
goggles. Dust mask, safety shoes, hard hat or
hearing protection must be used for appropriate
conditions. Everyday eyeglasses only have
impact resistant lenses, they are NOT safety
glasses.
Tool Use and Care
● Use clamps or other practical way to secure
and support the workpiece to a stable platform. Holding the work by hand or against your
body is unstable. It allows for work to shift,
causes binding of the tool and loss of control.
● Do not force tool. Use the correct tool for
your application. The correct tool will do the
job better and safer at the rate for which it is
designed. Do not use the tool for purpose not
intended - for example; do not use the miter saw
for slicing meats.
● Do not use tool if switch does not turn it
“ON” or “OFF”. Any tool that cannot be controlled with the switch is dangerous.
● Disconnect the plug from the power source
before making any adjustments or changing
accessories. Such preventive safety mea-
sures reduce the risk of starting the tool accidentally.
● Keep cutting tools sharp and clean. Properly
maintained tools, with sharp cutting edges, are
less likely to bind and easier to control. When
mounting saw blades be certain that the arrow
on the blade matches the direction of the arrow
marked on the tool and that the teeth are also
pointing in the same direction.
● Inspect guards before using a tool. Keep
guards in place. Check moving parts for
binding or any other condition that may
affect the normal operation or safety features of the tool. If damaged, have tool serviced before using the tool. Many accidents
are caused by poorly maintained tools.
● Do not alter or misuse tool. Any alteration or
modification is a misuse and may result in serious personal injury.
● The use of any other accessories not speci-
fied in this manual may create a hazard.
Accessories that may be suitable for one type of
tool, may become hazardous when used on an
inappropriate tool.
Service
● Tool service must be performed only by
qualified repair personnel. Service or maintenance performed by unqualified personnel may
result in misplacing internal wires and components which could cause serious hazard.
● When servicing a tool, use only identical
replacement parts. Follow instructions in
the Maintenance section of this manual. Use
of unauthorized parts or failure to follow
Maintenance Instructions may create a hazard.
Safety Rules
For Miter Saws
● Use clamps to support workpiece whenever
possible. If supporting the workpiece by
hand, you must always keep hand outside of
“No Hand” area as marked with a symbol on
the base. Do not use this saw to cut pieces
that are too small to be securely clamped.
Your hand if placed inside the “No Hands”
region can easily slip or be pulled into the blade.
● Do not reach in back of the saw blade
behind the fence with either hand to hold
down or support the workpiece, remove
wood scraps, or for any other reason. The
proximity of the spinning saw blade to your hand
may not be obvious and you may be seriously
injured.
● Never cross your hand over intended line of
cutting. Supporting the workpiece “cross handed” i.e. holding the left side of the workpiece
with your right hand is very dangerous.
● Always disconnect the power cord from the
power source before making any adjustments or attaching any accessories. You
may unintentionally start the saw, leading to
serious personal injury.
● Miter saws are intended to cut wood or
woodlike products, they cannot be used with
abrasive cutoff wheels for cutting ferrous
material such as bars, rods, studs, etc.
However, if cutting materials like aluminum
or other non-ferrous metals, use only saw
blades specifically recommended for nonferrous metal cutting. Cutting ferrous materi-
als causes excessive sparking and will damage
the lower guard and will overload the motor.
(NOTE: S-B Power Tool Company does not
offer 10” metal cutting blades.)
Safety
“READ ALL INSTRUCTIONS” — Failure to follow the SAFETY RULES identified by
BULLET (
●) symbol listed BELOW and other safety precautions, may result in serious person-
al injury.
WARNING
!
“SAVE THESE INSTRUCTIONS”
4.
● Inspect your workpiece before cutting. If
workpiece is bowed or warped, clamp it with
the outside bowed face toward the fence.
Always make certain that there is no gap between the workpiece, fence and table along
the line of the cut. Bent or warped workpieces
can twist or rock and may cause binding on the
spinning saw blade while cutting. Also, make
sure there are no nails or foreign objects in the
workpiece.
● Do not use the saw until the table is clear of
all tools, wood scraps, etc., except the workpiece. Small debris or loose pieces of wood or
other objects that contact the revolving blade
can be thrown with high speed at the operator.
● Do not feed workpiece into the blade or cut
“freehand” in any way. Workpiece must be
stationary and clamped or braced by your
hand. Saw must be fed through the workpiece
smoothly and at a rate which will not overload
the saw’s motor.
● Cut only one workpiece at a time. Multiple
workpieces cannot be adequately clamped or
braced and may bind on the blade or shift during cutting.
● Be certain the miter saw is mounted or
placed on a level, firm work surface before
using. A level and firm work surface reduces
the risk of the miter saw becoming unstable.
● Plan your work. Provide adequate support
accessories such as tables, saw horses,
table extension, etc. for workpieces wider or
longer than the table top (see page 20).
Workpieces longer or wider than the miter saw
table can tip if not securely supported. If the
cutoff piece or workpiece tips it can lift the lower
guard or be thrown by the spinning blade.
● Do not use another person as a substitute
for a table extension or as additional support. Unstable support for the workpiece can
cause the blade to bind or the workpiece to shift
during the cutting operation pulling you and the
helper into the spinning blade.
● The cutoff piece must not be jammed
against or pressured by any other means
against the spinning saw blade. If confined,
i.e. using length stops, it could get wedged
against the blade and thrown violently.
● Always use a clamp or a fixture designed to
properly support round material such as
dowel rods, or tubing. Rods have a tendency
to roll while being cut, causing the blade to “bite”
and pull the work with your hand into the blade.
● When cutting irregularly shaped work-
pieces, plan your work so it will not slip and
pinch the blade and be torn from your hand.
A piece of molding, for example, must lie flat or
be held by a fixture or jig that will not let it twist,
rock or slip while being cut.
● Let the blade reach full speed before con-
tacting the workpiece. This will help avoid
thrown workpieces.
● If the workpiece or blade becomes jammed
or bogged down, turn miter saw “OFF” by
releasing switch. Wait for all moving parts
to stop and unplug the miter saw, then work
to free the jammed material. Continued saw-
ing with jammed workpiece could cause loss of
control or damage to compound miter saw.
● Braking action of the saw causes the saw
head to jerk downward. Be ready for this
reaction when making an incomplete cut or
when releasing the switch before the head is
completely in the down position.
● After finishing the cut, release the switch,
hold the saw arm down and wait for blade to
stop before removing work or cutoff piece.
If blade does not stop within five (5) seconds, unplug the saw and follow the instructions in the Troubleshooting section.
REACHING WITH YOUR HAND UNDER A
COASTING BLADE IS DANGEROUS!
● There are additional safety instructions
for particular operations of the saw in the
operating section. Read the rest of the manual for safe operation.
● For slide action cutting, first PULL saw head
assembly away from the fence, until blade
clears the workpiece or to its maximum
extension if blade cannot clear the workpiece. Make certain the clamp does not interfere with the guard and head assembly.
Second, turn saw “ON” and lower the saw to
the table. Then PUSH saw through the workpiece. Release the switch and wait for the
blade to completely stop before raising the
head assembly and removing the workpiece.
Never “pullcut” since blade may climb the workpiece causing KICKBACK.
● For chop action cutting, slide the head
assembly to the rear as far as it will go and
tighten slide lock knob. Then turn the saw
“ON” and lower the head assembly to make
the cut. Release the switch and wait for the
blade to completely stop before raising the
head assembly and removing the workpiece.
Failure to tighten the slide lock knob can cause
the blade to suddenly climb up on the top of the
workpiece and force itself toward you.
Safety
“READ ALL INSTRUCTIONS” — Failure to follow the SAFETY RULES identified by
BULLET (
●) symbol listed BELOW and other safety precautions, may result in serious person-
al injury.
WARNING
!
5.
● Do not allow familiarity gained from frequent
use of your miter saw to become commonplace. Always remember that a careless frac-
tion of a second is sufficient to inflict severe
injury.
● THINK SAFETY! SAFETY IS A COMBINATION
OF OPERATOR’S COMMON SENSE, KNOWLEDGE OF THE SAFETY AND OPERATING
INSTRUCTIONS AND ALERTNESS AT ALL
TIMES WHEN THE MITER SAW IS BEING
USED.
THE WARNINGS SHOWN
BELOW CAN BE FOUND ON
YOUR TOOL. THESE WARNINGS ARE ONLY A
CONDENSED FORM OF THE MORE DETAILED
SAFETY RULES AND PRECAUTIONS THAT
APPEAR IN YOUR OWNER'S MANUAL. THEY
SERVE AS A REMINDER OF ALL SAFETY RULES
NEEDED FOR SAFE OPERATION OF THIS MITER
SAW.
Some dust created by power
sanding, sawing, grinding,
drilling, and other construction activities contains
chemicals known to cause cancer, birth defects or
other reproductive harm. Some examples of
these chemicals are:
• Lead from lead-based paints,
• Crystalline silica from bricks and cement and other
masonry products, and
• Arsenic and chromium from chemically treated
lumber.
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 those dust masks that are specially designed
to filter out microscopic particles.
Safety
“READ ALL INSTRUCTIONS” — Failure to follow the SAFETY RULES identified by
BULLET (●) symbol listed BELOW and other safety precautions, may result in serious personal
injury.
“SAVE THESE INSTRUCTIONS”
WARNING
!
WARNING
!
WARNING
!
WARNING
EXTEND SLIDING
BASE WHEN
MAKING BEVEL
DESIGNATED DANGER ZONE.
AVOID POSITIONING HANDS,
FINGERS OR ARMS IN THE
AREA DESIGNATED BY THIS
SYMBOL.
WARNING
KEEP HANDS AT A SAFE DISTANCE FROM THE SAW BLADE.
NEVER CROSS YOUR HANDS WITH THE PATH OF SAW BLADE. DO NOT REACH
BEHIND, BENEATH OR IN FRONT OF THE BLADE.
CLAMP WORKPIECE AGAINST BASE AND FENCE. NEVER PERFOAM ANY
OPERATION FREEHAND.
ALL ELECTRIC BRAKE SAWS MAY, ON OCCASIONS, FAIL TO STOP THE BLADE.
AFTER TURNING SAW “OFF”, ALWAYS MAINTAIN SAW HEAD IN DOWN POSITION
AND WAIT FOR BLADE TO STOP BEFORE REMOVING CUTOFF PIECES OR
CLEANING THE TABLE.
R
511
3915
LR61595
LISTED 407J
0 601 475 035
R
R
*
BOSCH
10" (254mm) SLIDE COMPOUND MITER SAW
120 VOLTS AC ONLY TO 60 Hz
13 AMPS 4700 RPM
DOUBLE INSULATED
SN.
WARNING
ALWAYS WEAR SAFETY GOGGLES.
TO AVOID ELECTRICAL SHOCK DO NOT EXPOSE
SAW TO RAIN OR USE IN DAMP LOCATIONS.
USE SAW BLADE RATED 6000 RPM OR GREATER.
DISCONNECT SAW FROM POWER SOURCE
BEFORE SERVICING OR CHANGING BLADE.
WHEN SERVICING USE ONLY IDENTICAL
REPLACEMENT PARTS.
S –B Power Tool Co. Chicago, IL Made in Taiwan
READ AND UNDERSTAND
THE OWNER'S MANUAL
BEFORE USING THIS TOOL.
CUTS OR TABLE
IS TURNED TO
LEFT SIDE.
*
KEEP GUARDS IN PLACE.
RETURN GUARD TO OPERATING
POSITION AFTER CHANGING THE BLADE.
IF GUARD FAILS TO WORK SMOOTHLY, STOP
SAWING AND SERVICE IT BEFORE PROCEEDING.
FOR SLIDE ACTION CUTTING,
ALWAYS FOLLOW THESE
INSTRUCTIONS:
1
PULL saw carriage away from
1.
the fence, until blade clears
the workpiece or to its maximum extension if blade can
not clear the workpiece.
Turn saw “ON” and lower the
2.
saw to the table.
PUSH saw thru the workpiece.
3.
Never “pull-cut” since blade
may climb the workpiece
causing KICKBACK.
WARNING
WARNING
BOSCH
0
5
5
0
5
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4
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3
6.
Double Insulated Tools
Double insulation is a design concept used in
electric power tools which eliminates the need for the
three wire grounded power cord and grounded power
supply system. It is a recognized and approved system by Underwriter’s Laboratories, CSA and Federal
OSHA authorities.
● Servicing of a tool with double insulation requires
care and knowledge of the system and should be
performed only by a qualified service technician.
● WHEN SERVICING, USE ONLY IDENTICAL
REPLACEMENT PARTS.
● POLARIZED PLUGS. Your tool is equipped with
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.
To reduce the risk of electrical shock, do not
change the plug in any way.
Extension Cords
● Replace damaged cords immediately. Use of
damaged cords can shock, burn or electrocute.
● If an extension cord is necessary, a cord with
adequate size conductors should be used to prevent excessive voltage drop, loss of power or
overheating. The table shows the correct size to
use, depending on cord length and nameplate
amperage rating of tool. If in doubt, use the next
heavier gauge. Always use U.L. and CSA listed
extension cords.
RECOMMENDED SIZES OF EXTENSION CORDS
Tools 120 Volt A.C. Tools
Ampere Cord Length in Feet
Rating Cord Size in A.W.G.
25 50 100 150
3-6 18 16 16 14
6-8 18 16 14 12
8-10 18 16 14 12
10-12 16 16 14 12
12-16 14 12 N/A N/A
NOTE: The smaller the gauge number, the heavier
the cord.
Safety
“READ ALL INSTRUCTIONS” — Failure to follow the SAFETY RULES identified by
BULLET (
●) symbol listed BELOW and other safety precautions, may result in serious person-
al injury.
“SAVE THESE INSTRUCTIONS”
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
General Safety Rules For Bench Top Tools. . . . 2
Safety Rules For Miter Saws . . . . . . . . . . . . . 3-6
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical Requirements. . . . . . . . . . . . . . . . . . . 7
Getting To Know Your Miter Saw . . . . . . . . . . 8-9
Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . 10-12
Tools Needed For Assembly And Alignment . . 10
Unpacking and Checking Contents . . . . . . . . . 10
Installation and Removal of the Blade . . . . 11-12
Assembling Dust Elbow and Dust Bag . . . . . . 12
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . 13-16
Blade Square To Table (90°) . . . . . . . . . . . . . . 13
Blade 45° To The Table . . . . . . . . . . . . . . . . . 14
Blade Square To Fence . . . . . . . . . . . . . . . . . 15
Miter Scale Indicator Adjustment. . . . . . . . . . . 15
Kerf Insert . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Depth Stop Adjustment. . . . . . . . . . . . . . . . . . 16
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . 17-18
Mounting Applications. . . . . . . . . . . . . . . . . . . 17
Basic Saw Operations. . . . . . . . . . . . . . . . . 19-22
Body and Hand Position . . . . . . . . . . . . . . . . . 19
Workpiece Support. . . . . . . . . . . . . . . . . . . . . 20
Switch Activation . . . . . . . . . . . . . . . . . . . . . . 21
Detent Override . . . . . . . . . . . . . . . . . . . . . . . 22
Sliding Base/Fence Extension . . . . . . . . . . . . 22
Saw Operations . . . . . . . . . . . . . . . . . . . . . . 23-30
Chop Cut . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Slide Cut . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Miter Cut . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Bevel Cut . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Compound Cuts . . . . . . . . . . . . . . . . . . . . . . . 25
Cutting Grooves (Dado Cut) . . . . . . . . . . . . . . 26
Cutting Base Molding . . . . . . . . . . . . . . . . . . . 27
Cutting Crown Molding . . . . . . . . . . . . . . . . . . 27
Special Cuts. . . . . . . . . . . . . . . . . . . . . . . . . . 30
Maintenance and Lubrication . . . . . . . . . . . . . 31
Troubleshooting . . . . . . . . . . . . . . . . . . . . . 32-33
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table of Contents
WARNING
!
Electrical Requirements
1. Connect this saw to a 120V, 15-amp branch circuit with a 15-amp time delay fuse or circuit
breaker. Using the wrong size fuse can damage
the motor.
2. Fuses may “blow” or circuit breakers may trip
frequently if motor is overloaded. Overloading
can occur if you feed the blade into the workpiece too rapidly or start and stop too often in
a short time.
3. Most motor troubles may be traced to loose or
incorrect connections, overload, low voltage
(such as small size wire in the supply circuit or
too overly long supply circuit wire). Always
check the connections, the load and the supply
circuit whenever motor does not work well.
Electric Brake
Your saw is equipped with an automatic electric
brake which is designed to stop the blade from spinning in about five (5) seconds after you release the
trigger switch. It is useful when making certain cuts
in wood where a coasting blade would result in a
wide, imprecise cut.
When electrical power is lost due to
blown fuse or other causes, the
motor will gradually slow down and the braking action
is initiated ONLY by the release of the trigger switch.
The electric blade brake of your miter saw has been
designed for highest degree of reliability, but unexpected circumstances such as contamination on the
commutator and brushes or failure of motor’s components can cause the brake not to activate. If this condition occurs, turn the saw “ON” and “OFF” four to
five times without contacting the workpiece. If the
tool operates but the brake does not consistently stop
the blade in about five (5) seconds, DO NOT use saw
and have it serviced immediately.
The brake action of this saw is not
intended as a safety feature.
Remember to let the saw blade come to a complete
stop before raising the blade from the workpiece. As
always the guard system is your best protection
against unintentional contact with a spinning saw
blade. NEVER wedge open or defeat the closing
action of the lower guard.
7.
Wiring Diagram
This wiring diagram can be used only with switch (Part No. 2610911881) supplied with your
miter saw. Other switches may look the same, but internal switch components can be different,
thus creating electrical shock hazard if wired according to this diagram.
WARNING
!
WARNING
!
WARNING
!
Black From
Power Cord
Grey From
Brake Lead
Black
From Field
To avoid injury from accidental starting, remove plug from power source
outlet before making any adjustments.
1. Switch “Lock-OFF” Button
This button must be pressed to activate the power
switch.
2. Power Switch
The power switch used with the “Lock-OFF” button
energizes the unit.
3. Switch Handle
This handle contains the switch. The blade is lowered into the workpiece by pushing/pulling down on
the handle.
4. Arbor Lock
Allows the user to keep the blade from rotating while
tightening or loosening arbor screw during blade
replacement or removal (Figure 34, page 28).
5. Lower Blade Guard/Lower Guard Lip
The lower blade guard helps protect your hands from
the spinning blade. It retracts as the blade is lowered. Lip can be used to raise the lower guard when
guard becomes jammed on a workpiece.
6. Blade
Use only 10" blades with 5/8" arbor hole.
7. Fence
Supports the workpiece. The fence has a cast in
scale to make repetitive cuts easy. The fence also
has holes which are used to secure an auxiliary
fence if desired.
8.
Getting To Know Your Miter Saw
WARNING
!
29
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20
26
27
BOSCH
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Getting To Know Your Miter Saw
8. Kerf Inserts
Kerf inserts can be adjusted to different blade widths
to minimize workpiece tear-out.
9. Miter Detent Override
Allows detent action to be locked out allowing for
micro adjustments to any miter angle.
10. Miter Lock Knob
The miter lock knob locks the miter saw table at any
desired miter angle.
11. Miter Detent Trigger
The trigger releases the table from the detent.
12. Miter Scale/Miter Angle Indicator
This scale is cast in on the base of the saw. Indicator
is fastened to the table.
13. Miter Detents
There are ten (10) miter detents for fast and accurate
miter cuts of common miter angles.
14. Table
Sits in base, provides workpiece support, rotates for
desired miter cuts and rotates the head assembly. The
front extended part of the table is called the miter arm.
15. Base
Provides working surface to support workpiece.
16 Tool Mounting Pads
The four corners of the saw provide areas to clamp,
bolt or nail the saw to a flat work surface.
17. Accessory Extension and Stock Stop
Machined holes that accept the extension wing/stop
accessory.
18. Sliding Base/Fence
This provides extra support and clamping area for
compound miter cuts.
19. Chip Deflector
This protects against large chips from entering the
upper guard.
20. Dust Chute Elbow
The dust chute elbow rotates 360° and can accommodate the dust bag or a 1-1/4" vacuum hose hookup.
21. 0° Bevel Stop
Adjustable stop for a quick and accurate 0° bevel
index.
22. 45° Bevel Stop
Adjustable stop for a quick and accurate 45° bevel
index.
23. Slide Rail Lock Knob
The slide rail lock knob locks the slide rails when you
are not making slide cuts and when you are transporting the saw.
24. Slide Rails
Guide the head assembly when making slide cuts.
25. Workpiece Clamp
Provides fast clamping of workpiece.
26. Lower Guard Actuation Link
Allows for smooth movement of the lower guard.
27. Upper Blade Guard
Covers upper portion of the blade.
28. Blade Wrench
Used for tightening/loosening blade and adjusting
bevel stops. Blade wrench is stored in the switch handle.
29. Power Cord
Supplies power to motor. Has molded cord retainer for
storage.
30. Workpiece Clamp Positions
There are four (4) positions behind the fence for the
workpiece clamp.
31. Hex Wrench
Used to adjust sliding base/fence, fence and blade
bolt. Hex wrench is stored in the base.
32 Bevel Detent Pin (Crown Molding Setting)
Allows you to easily move the head assembly to the
bevel angle of 33.9°.
33. Bevel Lock Handle
The bevel lock handle locks the head assembly at a
desired bevel angle. Handle ratchets for use in tight
spaces.
34. Bevel Scale
This scale is cast in on the saw. Allows you to read
the bevel angles easily (Figure 7, page 13).
35. Head Assembly Lock Pin
The compound miter saw is equipped with a lock pin
used to lock the head assembly in the lower position.
36. Depth Stop
Allows you to adjust the depth of the blade for cutting
grooves in the workpiece (Figure 14, page 16).
37. Brush Caps
These caps keep the motor brushes in position and
provide easy access for inspecting and replacing
brushes.
9.
28
37
36
35
30
34
16
33
32
29
31
30
16
10.
Disconnect plug from power source before performing any assembly, adjustment or repair to
avoid possible injury.
Unpacking And Checking Contents
Assembly
Tools Needed For Assembly And Alignment
Before moving the saw: Lock the
miter lock knob in 45° position.
Lock bevel lock handle. Pull the head assembly
completely toward you and tighten the slide rail lock
knob.
Lock head assembly in the down position.
Never carry the tool by the slide rails, this may
cause blade misalignment.
Never carry the tool by the cord or head assembly
power switch handle. Damage to insulation could
cause an electric shock. Damage to wire connections
could cause a fire.
Model 3915 Slide Compound Miter Saw is shipped
complete in one box.
1. Separate all parts from packing materials and
check each one with the “Table of Loose Parts” to
make sure all items are accounted for before discarding any packing material.
2. Table of Loose Parts:
Quick Action Clamp - Used to clamp workpieces.
Dust Elbow/Dust Bag - Used to collect saw dust.
Hex Wrench - Should be stored on the left rear
base.
Blade Wrench - Should be stored in the handle.
If any parts are missing, do not plug
in power cord or turn the switch on
until the missing parts are obtained and are installed
correctly.
WARNING
!
WARNING
!
WARNING
!
Phillips Screwdriver
Combination Square
Hex “L” Wrench
(supplied) 6mm
Combination Square Must be True
Draw Light
Line on Board
Along this Edge
Should be no Gap or Overlap
when Square is Flipped Over in
Dotted Position
Blade Wrench
(supplied)
Straight Edge of
Board 3/4" Thick
This Edge Must be
Perfectly Straight
Assembly
11.
Disconnect plug from power source
before performing any assembly,
adjustment or repair to avoid possible injury.
1. The slide compound miter saw is equipped with
a lock pin used to lock the miter saw in the lower
position. To release, push the handle down
slightly and pull the lock pin to its full out position
and rotate 90°.
NOTE: If the lock pin is stuck and will not pull out
when the handle is pushed down slightly, you
may have to adjust the depth stop screw (see
Depth Stop Adjustment, page 16) slightly so the
handle can be pushed down and the lock pin can
be pulled out.
2. Loosen the rear cover plate screw using a
Phillips screwdriver (Figure 1).
3. Rotate the lower guard by hand. Remove the
front cover plate screw using a Phillips screwdriver (Figure 1).
4. Rotate the cover plate counterclockwise so the
blade bolt is exposed (Figure 1).
5. Press and hold the arbor lock. Use the blade
wrench to remove the blade bolt by turning
wrench clockwise. NOTE: The blade bolt has
a left hand thread.
Figure 1. Blade Removal
6. Remove the blade bolt, arbor washer, outer
washer and the blade. Inner washer does not
need to be removed (Figure 2).
Figure 2. Blade Hardware
7. To install the 10" blade, fit blade between the
chip deflectors and onto arbor shaft (Figure 3).
NOTE: Make sure the rotation arrow on the
blade matches the clockwise rotation arrow on
the lower guard.
Figure 3. Blade Installation
To avoid injury, do not use a blade
larger or smaller than 10" diameter
and 5/8" arbor.
8. Replace the outer washer in the proper orientation, insert the arbor washer, and tighten blade
bolt finger tight. Press the arbor lock and tighten blade bolt securely using blade wrench, but
do not overtighten.
9. Rotate cover plate clockwise to original position.
Install the cover plate screw and tighten.
Installation And Removal Of The Blade
WARNING
!
WARNING
!
Outer Washer
Arbor Washer
Blade Bolt
(Left Hand Thread)
Sawblade
Inner Washer
Lower Guard
Rear Cover
Plate Screw
Cover
Plate
BOSCH
Front Cover
Blade Bolt
Chip Deflector
Plate Screw
Outer
Washer
BOSCH
Arbor
Shaft
Chip Deflector
Inner
Washer
Tighten the cover plate screw.
Loose cover plate screw may interfere with and hang-up lower blade guard. Never use
saw without cover plate securely in place. Lower
guard will not function properly.
10. Be sure the arbor lock is released so the blade
turns freely.
After installing a new blade, make
sure the blade does not interfere
with the table insert at the 0° and 45° bevel positions. Lower the blade into the table slot and check
for any contact with the base or turn table structure. If
blade contacts base or table, seek authorized service.
11. Replace blade wrench in storage on saw handle.
Assembly
1. With the miter arm locked in the down position,
push the dust elbow onto the dust nozzle. Rotate
elbow to the desired position. (Figure 4).
Figure 4. Dust Bag and Elbow
2. The dust bag attaches to the dust chute elbow
and is used to collect sawdust. The dust elbow
can also be attached to a standard 1-1/4" vacuum tube for dust collection.
3. Position dust elbow/bag so that it does not
interfere with the tool during the cutting operation
for all miter/bevel settings. Make sure dust bag
does not interfere with the slide rails during slide
cutting.
4. The dust bag requires emptying when full of
sawdust. Empty it frequently and after completion of sawing. Carefully remove dust bag from
dust elbow. Empty dust bag in proper trash bin
by unzipping the bag. Be extremely careful of
dust disposed, materials in fine particle form may
be explosive. Do not throw sawdust on an open
fire. Spontaneous combustion, may in time,
result from mixture of oil or water with dust
particles.
When sawing chemically pressure
treated lumber, paint that may be
lead based, or any other materials that may contain
carcinogens, use special precautions. A suitable respirator must be worn by all personnel entering the
work area. Work area should be sealed by plastic
sheeting and persons not protected should be kept out
until work area is thoroughly cleaned.
Assembling Dust Elbow And Dust Bag
12.
WARNING
!
WARNING
!
WARNING
!
Dust Elbow
Dust Bag
Disconnect plug from power source
before performing any assembly,
adjustment or repair to avoid possible injury.
NOTE: Your slide compound miter saw was completely adjusted at the factory. However, during shipment, slight misalignment may have occurred. Check
the following settings and adjust if necessary prior to
using this compound miter saw.
Blade Square To Table
(90°)
1. Rotate table to 0° position and lock in place.
2. Make sure head assembly is pushed back fully
against stop and slide rail lock knob is tightened.
3. Lower the blade and engage the lock pin. Use
a combination square to check blade squareness to table. Place the square on the table and
press it against the blade. If the blade does not
contact the full length of the square, (Figure 5)
follow the alignment procedure.
Figure 5. Blade Square to Table
90° Blade Alignment
a. Loosen bevel lock handle.
b. Lower 0° stop screw and jam nut using blade
wrench supplied in the handle.
c. Grasp switch handle, move the head
assembly left or right until blade makes contact with the full length of the square.
d. Tighten bevel lock handle.
e. Adjust 0° bevel stop screw so that the hex
screw head hits the 0° stop at the same time
the blade makes contact with the full length of
the square. Tighten jam nut (Figure 6).
Figure 6. Bevel 0° Stop Screw and Jam Nut
f. Adjust bevel indicator. Loosen screw and
align indicator to the 0° mark. Tighten screw
(Figure 7).
Figure 7. Bevel Indicator
1. Rotate table to 0° position and lock in place.
2. Make sure head assembly is pushed back fully
against stop and slide rail lock knob is tightened.
13.
Adjustments
WARNING
!
0° Stop
0° Stop
Screw
Jam Nut
BOSCH
Table
0
5
5
50
4
5
4
0
30
5
3
0
0
1
5
5
1
0
2
5
2
Blade
Combination Square
Adjust To 0°
0
5
1
Bevel
Scale
Screw
30
33
.9
45
Bevel
Indicator
3. Lower head assembly. Lock in place.
4. Loosen bevel lock handle and tilt the head
assembly to 45° bevel. Check the 45° bevel
stop. The bevel indicator should be on the 45°
mark, the 45° bevel stop should be in full contact
with the 45° bevel stop screw, and the blade
should contact the full length of the combination
square (Figure 8).
5. If the blade is not 45° with the table, adjust 45°
bevel stop.
45° Blade Alignment
a. Lower the 45° bevel stop screw jam nut
using blade wrench supplied in the handle.
b. Grasp switch handle, move the head
assembly left or right until blade makes contact with the full length of the square.
c. Tighten the bevel lock handle.
d. Adjust 45° bevel stop screw so that the hex
screw head hits the 45° stop at the same
time the blade makes contact with the full
length of the square. Tighten 45° jam nut
(Figure 9).
e. Check that bevel indicator is pointing to the
45° mark on the bevel scale (see Figure 7). If
bevel indicator is not aligned with the 45°
mark, first recheck the blade squareness to
the table and 0° bevel indicator alignment.
Then, repeat the 45° blade alignment and
make appropriate adjustments.
Figure 8. Blade 45° To The Table
Figure 9. Bevel 45° Stop Screw and Jam Nut
14.
Blade 45° To The Table
Adjustments
BOSCH
Blade
0
5
0
50
45
4
0
5
3
5
10
5
1
20
3
0
25
Combination
Square
45° Stop
45° Stop
Screw
Jam Nut
Table
0
5
30
45
15.
Adjustments
Miter Scale
Indicator Adjustment
1. Rotate table to 0° position and lock in place.
2. Raise the head assembly to the full-up position.
3. Loosen the Phillips screw that holds the indicator in place (Figure 12).
4. Position the indicator to align with the 0° miter
mark. Tighten the screw.
Figure 12. Miter Scale Adjustment
Blade Square to Fence
1. Make sure head assembly is pulled forward near
the center of the table and slide rail lock knob is
tightened.
2. Lower the head assembly, pull the lock pin out
and rotate it 90°, rotate to lock in the
lower position. Make sure table is in 0° detent
and tighten miter lock knob. Place a combination
square against the fence and next to the blade as
illustrated. Locate the square properly so it does
not contact the tooth of saw blade. The saw
blade should contact the full length of the square
(Figure 10).
3. If blade does not contact the square, follow the
fence alignment procedure.
Figure 10. Blade Square to Fence
Fence Alignment
a. The head assembly should remain in lowered
position.
b. Use hex wrench (supplied) and loosen three
(3) hex cap screws behind fence (Figure 11).
c. Adjust fence until blade and the fence has full
contact with the square.
d. Tighten hex cap screws.
Figure 11. Fence Adjustment
BOSCH
Fence
0
5
Blade
Fence
Fence
Hex Cap
Screws
Hex Cap
Screw
Hex "L" Wrench
5
50
4
5
4
0
5
3
0
0
1
5
5
1
0
2
30
5
2
Combination Square
Indicator
Adjustment
Screw
2
/1
4
CM
6/12
/12
8
45
22.5
.6
1
3
25
30
35
45
2
/1
4
40
22.5
5
2
3
6/1
CM
30
31.6
/12
8
25
0
2
2/12
1
0
2
0
5
10
5
0° Mark
Miter Scale
Indicator
16.
Adjustments
Kerf Insert
— The depth stop adjustment is a feature used
when cutting grooves (or dados) in the workpiece. (See page 26 for cutting grooves.)
— When the diameter of the blade has been
reduced due to sharpening, it may be necessary
to adjust the depth stop. When a new blade is
installed, it is necessary to check the clearance
of the blade to the turn table structure.
Follow these instructions for adjusting the depth
stop.
1. Loosen the two (2) jam nuts on the end of the
depth stop bolt (Figure 14).
2. Loosen the knurled nut at the top of the arm
(Figure 14).
3. The saw blade is lowered by turning the depth
stop bolt counterclockwise and raised by turning
the bolt clockwise.
4. Lower the blade into the slot of the turn
table. Check blade clearance and maximum cutting distance (distance from fence where blade
enters) to front of work table slot. Adjust if necessary.
Do not start the slide compound
miter saw without checking for interference between the blade and the turn table structure. The blade could be ruined if it cuts into the table
structure.
Figure 14. Depth Stop Adjustment
5. Tighten the knurled nut at the top of the
arm.
6. Tighten the two (2) jam nuts against the depth
stop base.
Depth Stop Adjustment
The kerf insert should be adjusted close to the blade,
but without touching the blade, to avoid tear-out on
the bottom of the workpiece.
1. Lower the head assembly and lock into position.
2. Loosen the six (6) kerf screws using the Phillips
screwdriver (Figure 13).
3. Adjust the kerf inserts as close to the blade
(teeth) as possible without touching the blade.
4. Tighten the kerf screws.
NOTE: At extreme bevel angles the saw blade may
slightly cut into kerf insert.
Figure 13. Kerf Insert
CAUTION
!
2
/
1
2
10
5
CM
12
/
8
2
/1
6
4/12
22.5
25
5
2
15
Depth Stop
Bolt
Kerf Screws
12/12
12
10/
45
0
4
.6
1
3
35
30
Kerf Screws
Kerf Inserts
Knurled Nut
Depth Stop Base
Jam Nuts
Depth Stop
17.
Installation
To avoid injury always observe the
following:
● Unplug electric cord. Before transporting the
saw, rotate head assembly to 45° right miter,
lock into detent, pull the head assembly completely forward toward you, tighten the slide rail
lock knob and lock the head assembly in the
lowered position.
● To avoid back injury, hold the tool close to your
body when lifting. Bend your knees so you can
lift with your legs, not your back. Lift by using
the cast-in carry handles at each side of the bottom of the base.
● Never carry the tool by the slide rails, this
may cause blade misalignment.
● Never carry the miter saw by the power cord or
the operational handle. Attempting to lift or
carry the tool by the power cord will damage the
insulation and the wire connections resulting in
electric shock or fire.
● Observe the position of the saw. People
standing behind it could be injured by thrown
debris.
● Place the saw on a firm, level surface where
there is plenty of room for handling and properly supporting the workpiece.
● Bolt, nail or clamp the saw to its support.
Be careful not to over drive nail
or over torque the bolt. This could
crack foot or damage base.
Workbench
Mount the saw using either the four bolt holes (7/16")
or the four nail holes to the workbench (Figure 15).
Check for clearance to the left and right of the saw.
Figure 15. Workbench Mounting
1. Each of the four mounting holes should be bolted securely using 7/16" bolts, lock washers, and
hex nuts (not included).
2. Locate and mark where the saw is to be mounted.
3. Drill four (4) 7/16" diameter holes through workbench.
4. Place the slide compound miter saw on the
workbench aligning holes in base with holes
drilled in workbench. Install bolts, lock washers and hex nuts.
Supporting surface where saw is to be mounted
should be examined carefully after mounting to insure
that no movement can occur during use. If any tipping
or walking is noted, secure the workbench or stand
before operating the slide compound miter saw.
Mounting Applications
WARNING
!
CAUTION
!
BOSCH
Nail Hole
Bolt Hole
50
4
5
4
0
35
3
0
25
2
0
1
5
10
5
Bolt Holes
Nail Holes
0
Bolt Hole
Nail Hole
0
5
45
0
4
5
3
0
3
18.
Installation
Portable Mounting Using Clamps
— If necessary, clamp the slide compound miter
saw to a workbench or table top.
— Place two (2) or more “C” clamps on the clamp-
ing areas and secure (Figure 16).
Portable Mounting Using 2x4’s
— In order to avoid any twisting of the saw, the saw
can be placed over (2) 2x4’s mounted on a workbench.
— The cast-in carry handle openings have ribs on
the inside that are the same size as a 2x4.
Center the miter saw openings over the 2x4’s
which have been clamped or nailed on a work
bench for stability (Figure 17).
NOTE: The board does not slide completely through
the opening. The saw must be placed over two (2)
boards, one on each side.
Figure 16. Portable Mounting Using Clamps
Figure 17. Portable Mounting Using 2x4’s
BOSCH
Clamping Area
50
5
4
0
4
5
3
0
3
50
4
5
4
0
35
3
0
25
2
0
1
5
10
Clamping Areas
0
5
BOSCH
0
5
5
4
0
4
5
3
5
0
4
5
4
0
3
5
3
0
2
5
20
1
5
1
0
0
5
0
3
2x4 Nailed to Workbench
Position your body and hands properly to make cutting easier and safer.
Observe the following instructions (Figure 18).
● Never place hands near cutting area. Keep
hands outside the “No Hands” zone.
● The “No Hands Zone” is defined as the area
between marked lines on the left and right side of
the Base, including the entire Table and portions
of the Fence within these marked lines. This
zone is labeled by “No Hands” symbols placed
just inside the marked lines on the Base.
● Hold workpiece firmly to the fence to prevent
movement.
● Keep hands in position until trigger has been
released and blade has stopped completely.
● Never place hands on slide rails.
Figure 18. Hand Positions
● Keep feet firmly on the floor and maintain prop-
er balance.
● Follow the miter arm when mitering left or right.
Stand slightly to the side of the saw blade.
● Before making any cut, with the power off, lower
the blade to preview the blade path.
The lower guard may not automatically open under certain cutting con-
ditions. If this occurs:
● Typically this may occur when trying to cut work-
pieces that are near the maximum cutting height
capacity. Under these conditions, the workpiece
can stop the lower guard movement before the
downward motion of the arm could pre-open the
lower guard. If this occurs:
● Workpiece must be securely clamped. This
frees a hand to raise the guard by the lip just
enough to clear the workpiece (Figure 19).
● Start the saw and begin your cut.
● Once you have cleared the position where the
lower guard may bind, release the guard and it
will continue to operate automatically as you
cut.
Figure 19. Raising Lower Guard
19.
Basic Saw Operations
Body and Hand Position
WARNING
!
WARNING
!
Correct
Incorrect Use
BOSCH
50
5
4
0
4
5
3
50
4
5
4
0
3
5
3
0
2
5
2
BOSCH
5
0
4
5
4
0
3
5
3
0
2
5
2
0
1
5
1
0
0
5
0
3
0
1
5
1
0
0
5
50
5
4
0
4
5
3
0
3
BOSCH
0
5
5
4
40
5
3
5
0
4
5
4
0
3
5
3
0
2
5
5
0
4
5
4
0
3
5
0
3
2
0
1
5
1
0
0
5
BOSCH
0
5
45
0
4
35
0
3
0
2
5
3
2
0
1
5
1
0
0
5
Lip
Lower Guard
BOSCH
Open
Workpiece
20.
Long workpieces have a tendency to
tip over unless clamped down and
properly supported from underneath.
Clamps
Workpiece Clamp - This clamp easily secures a
workpiece in any of four (4) clamp holes behind the
fence (Figure 20).
— Insert clamp post into clamp hole.
— Loosen wing nut and adjust arm to proper height,
and securely tighten wing nut.
— Rotate screw knob of the clamp clockwise to
tighten, counter-clockwise to loosen.
— Move the head assembly to check clearance
with clamp.
There may be extreme compound
cuts where clamp cannot be used.
Support workpiece with hand outside No Hands Zone.
Do not try to cut short pieces that cannot be
clamped and cause your hand to be in the No Hands
Zone.
Figure 20. Workpiece Clamp
Conventional Clamps and other hold down devices
can be used to hold the workpiece firmly against the
table and the fence.
Long Workpiece Support
Blocks - Long pieces need extra support. The base
height (3-3/4") is designed to match the standard
lumber of two 2x’s and one 1x. Boards of these thicknesses can be used to create auxiliary support extensions for long workpieces (Figure 21).
Figure 21. Block Support
Extension Wing and Stock Stop - This attachment
(accessory #BA162) allows extra support for the
longer workpieces. Refer to the accessory instruction
sheet for details (Figure 22). See page 34 for a complete accessory list.
Figure 22. Extension Wing and Stock Stop
Basic Saw Operations
Workpiece Support
WARNING
!
WARNING
!
BOSCH
Two 2x’s
and One 1x’s
50
5
4
0
4
35
30
50
4
5
4
0
3
5
3
0
2
5
2
0
0
1
5
1
0
5
25
Workpiece
Clamp
Clamp
BOSCH
Holes
Clamp
Post
5
0
45
40
3
5
3
0
25
2
0
15
10
0
5
Clamp
Holes
50
5
4
0
4
35
30
Screw Rod
BOSCH
Extension Wing
and Stock Stop
50
5
4
0
4
5
3
50
4
5
4
0
3
5
3
0
2
5
20
1
5
1
0
0
5
0
3
Extension Wing
and Stock Stop
21.
Basic Saw Operations
Auxiliary Fence - Certain types of molding need a
fence face extension because of the size and position
of the workpiece. Holes are provided in the fence to
attach an auxiliary fence. The auxiliary fence is used
with the saw in the 0° bevel position only.
1. Place a piece of wood against the miter saw
fence (Figure 23). (Wood can have a maximum height of 3-1/4". Check that head
assembly does not interfere with auxiliary
fence.)
2. Mark the locations of the support holes on
the wood from the back side of the fence.
3. Drill and countersink the holes on the front of
the support board.
4. Attach the auxiliary fence using three (3) 1/4"
flat head machine screws. Make a full depth
cut to create the blade slot. Check for interference between the auxiliary fence and the
lower blade guard. Make adjustments as
necessary.
Check for interference from any
components.
Figure 23. Auxiliary Fence
The safety switch is designed to prevent accidental
starts. To operate safety switch, press the switch
“Lock-OFF” button with your thumb (or index finger for
left hand) to disengage the lock, then pull the power
switch trigger and release the switch “Lock-OFF” button (Figure 24). When the power switch trigger is
released, the switch “Lock-OFF” button will engage
the safety switch automatically, and the trigger will no
longer operate.
NOTE: Switch can accommodate a padlock with a
long shackle of up to 1/4" in diameter (not provided
with slide compound miter saw) to prevent unauthorized use.
Figure 24. Switch Activation
Switch Activation
WARNING
!
Flat Head
BOSCH
Machine
Screws
5
0
45
40
3
5
3
0
25
2
0
15
10
Blade Slot
Switch
“Lock-OFF”
Button
BOSCH
50
5
4
0
4
5
3
0
3
0
5
Auxiliary
Fence
Power
Switch
22.
Basic Saw Operations
To Engage:
1. Lift the miter detent trigger.
2. Push the detent override clip forward and latch in
place over edge. Release miter detent trigger
(Figure 25).
3. Move miter arm to any position on the miter
scale.
4. Lock the miter lock knob to retain miter position.
To Disengage:
5. Loosen miter lock knob and lift the miter detent
trigger to release the detent override clip. The
clip should automatically disengage and the
table should lock into any desired miter detent.
Figure 25. Detent Override
Detent Override
Extend and use sliding base/fence
when making severe bevel, severe
miter or compound cuts to provide sufficient (minimum 6") spacing from hand to saw blade.
1. Remove hex wrench from storage position on
left rear leg.
2. Loosen two (2) socket cap screws in sliding
base channel (Figure 26).
3. Extend sliding base/fence to the desired posi-
tion.
4. Tighten screws. Store hex wrench.
During transportation, sliding base
should always be secured in the full
in position.
Figure 26. Sliding Base/Fence
Sliding Base/Fence Extension
WARNING
!
WARNING
!
Clip Edge
Detent Override Clip
5
0
Table
Miter Detent
Trigger
Miter Lock
Knob
Sliding
Base/Fence
Socket Cap
Screws
12/1
2
10/12
50
8/12
4
6/1
5
2
40
4/12
33
.5
35
30
2/12
22
.5
25
20
15
—
The slide rail lock knob is loose, the head assembly is pulled towards the operator, the head
assembly is lowered to the workpiece and then
pushed to the rear of the saw to make the cut.
—
This type of cut is used mainly for wide
pieces.
—
A positive blade hook of 10 degrees or more is
recommended for best performance when making aggressive cuts or cutting thicker materials.
See page 34 for accessory blade listing.
NEVER pull the saw toward you dur-
ing a cut. The blade can suddenly
climb up on top of the workpiece and force itself toward
you.
Follow these instructions for making your slide
cut:
1. Properly position workpiece. Make sure work-
piece is clamped firmly against the table and
the fence.
Use clamping position that does not
interfere with operation. Before switching on, lower head assembly to make sure clamp clears
guard and head assembly.
2. Loosen the slide rail lock knob.
3. Grasp the switch handle and pull the head
assembly away from the fence, until the blade
clears the workpiece or to its maximum extension if blade cannot clear the workpiece (Figure
28).
4. Activate the switch. Lower the assembly all the
way down and cut through the edge of the workpiece.
5. Push (but do not force) the head assembly
towards the fence to the full rear position to
complete the cut.
6. Wait until blade comes to a complete stop before
returning head assembly to the raised position
and/or removing workpiece.
Figure 28. Slide Cut
Saw Operations
Slide Cut
—
The slide rail lock knob is tightened and the
head assembly is lowered to cut through the
workpiece.
—
This type of cut is used mainly for narrow
pieces.
Follow these instructions for making your chop
cut:
1. Slide the head assembly to the rear as far as it
will go (Figure 27).
2. Tighten the slide rail lock knob (Figure 27).
3. Properly position workpiece. Make sure workpiece is clamped firmly against the table and the
fence.
Use clamping position that does not
interfere with operation. Before
switching on, lower head assembly to make sure
clamp clears guard and head assembly.
4. Activate the switch. Lower the head assembly
and make your cut.
5. Wait until blade comes to a complete stop
before returning head assembly to the raised
position and/or removing workpiece.
Figure 27. Chop Cut
Chop Cut
WARNING
!
WARNING
!
WARNING
!
23.
Slide Completely
Against Rest
Slide Lock
Knob
BOSCH
Tightened
First:
Pull
Forward
BOSCH
50
5
50
4
5
0
5
0
1
5
1
0
2
30
5
4
0
2
5
3
Workpiece
Workpiece
Clamp
Second:
Turn
Saw On
Lower
Head
Assembly
Third:
Push
Blade Into
Workpiece
24.
—
A miter cut is made at 0° bevel and any miter
angle in the range from 52° left to 62° right.
—
The miter scale is cast-in on the table for easy
reading.
—
Positive detents have been provided for fast
and accurate mitering at 0°, 15°, 22.5°, and
45° left and right and 60° right.
—
There are crown molding detents (left and right)
at 31.6° (see Cutting Crown Molding for more
information page 27).
—
For precision settings, use the detent override
to lock out the detent.
—
A miter cut can be made as either a chop cut or
a slide cut depending on the width of the workpiece.
—
The kerf inserts should be as close to the blade
as possible without touching the blade (see Kerf
Inserts for adjustment procedures).
Follow these instructions for making your miter
cut:
1. Loosen miter lock knob. Lift miter detent trigger
and move the saw to the desired angle, using
either the detents or the miter scale. Tighten
miter lock knob (Figure 29).
2. Properly position workpiece. Make sure work
piece is clamped firmly against the table and the
fence.
Use clamping position that does not
interfere with operation. Before
switching on, lower head assembly to make sure
clamp clears guard and head assembly.
3. Follow procedures for either chop cut or slide
cut (see page 23).
4. Wait until blade comes to a complete stop before
returning head assembly to the raised position
and/or removing workpiece.
Figure 29. Miter Cut
Saw Operations
Miter Cut
Bevel Cut
— A bevel cut is made at 0° miter and any bevel
angle in the range of -2° to 47°.
— There are factory set bevel stops at 0°
and 45°. (See Adjustment section if adjustments are required.)
— The cast in bevel scale faces the operator for
easy reading.
— There is a positive crown molding bevel stop at
33.9°. Disengage this stop unless using.
(See Cutting Crown Molding for details.)
— A bevel cut can be made as either a chop cut or
a slide cut depending on the width of the workpiece.
— The bevel lock handle is spring loaded and can
be repositioned by pulling handle out, rotating to
desired position and engaging by releasing for
use in tight spaces.
— Use sliding base/fence as appropriate.
(See Sliding Base/Fence Extension page 22.)
WARNING
!
Workpiece
Clamp
BOSCH
Miter
Lock
Knob
50
50
45
4
40
0
35
3
30
0
2
5
20
20
15
1
10
0
5
10
0
5
1
5
0
0
1
50
45
0
0
4
4
5
3
0
0
3
3
5
2
0
2
20
Workpiece
Miter Scale
Detents
25.
Follow these instructions for making your bevel
cut:
1. Loosen the bevel lock handle. Tilt the head
assembly to desired bevel angle. Tighten the
bevel lock handle (Figure 30).
2. Properly position workpiece. Make sure work
piece is clamped firmly against the table and the
fence.
Use clamping position that does not
interfere with operation. Before
switching on, lower head assembly to make sure
clamp clears guard and head assembly.
3. Follow the procedures for either a chop cut or
slide cut (see page 23).
4. Wait until blade comes to a complete stop before
returning head assembly to the raised position
and/or removing workpiece.
Figure 30. Bevel Cut
Saw Operations
Compound Cuts
— A compound cut is a cut requiring both a miter
setting and a bevel setting.
— A compound cut can be made as either a chop
cut or a slide cut depending on the width of the
workpiece.
— Because it may take several tries to obtain the
desired compound angle, perform test cuts on
scrap material before making your cut.
Follow these instructions for making your compound cut:
1. Extend the sliding base/fence when making compound cuts that are mitered to the left (see
Sliding Base/Fence Extension on page 22).
Select the desired miter and bevel angles (Figure
31). (See Miter Cut and Bevel Cut on page 24.)
2. Properly position workpiece. Make sure work
piece is clamped firmly against the table and the
fence.
Use clamping position that does not
interfere with operation. Before
switching on, lower head assembly to make sure
clamp clears guard and head assembly.
3. Follow the procedures for either chop cut or slide
cut (see page 23).
4. Wait until blade comes to a complete stop before
returning head assembly to the raised position
and/or removing workpiece.
Figure 31. Compound Cut
WARNING
!
WARNING
!
Workpiece
Clamp
Bevel
Angle
Workpiece
0
5
30
45
50
45
4
0
3
5
3
0
2
5
20
1
5
10
5
0
0
1
45
40
5
3
30
5
2
20
15
0° Miter
Workpiece
Clamp
Bevel
Angle Scale
Sliding
Base
50
5
4
0
5
0
5
10
4
5
3
0
3
5
2
0
2
1
5
Workpiece
Miter Angle
26.
—
The depth stop adjustment is a feature used
when cutting grooves (dados) in the workpiece.
—
The depth adjustment is used to limit blade
depth to cut grooves.
—
A groove can be cut as a slide cut.
1. Set the depth of cut by loosening the knurled nut
on the depth adjustment bolt (Figure 32). Do not
change the position of the two (2) jam nuts on
the end of the bolt.
2. Turn the depth stop bolt to the correct setting.
Figure 32. Cutting Grooves
3. Tighten the knurled nut.
4. Cut the two outside grooves.
5. Use a wood chisel or make multiple passes by
sliding the wood over to one side to remove the
material between the outside grooves (Figure 33).
Figure 33. Rough Cut Groove
K
t
Saw Operations
Cutting Grooves (Dado Cut)
Depth Stop
Bolt
nurled Nu
Depth Stop Base
Jam Nuts
Depth Stop
Grooves
Chisel Cut
Workpiece
BASE MOLDING CUTTING INSTRUCTIONS
SETTINGS Vertical Position Horizontal Position
/ Back of molding is Back of molding is flat
INSTRUCTIONS against the fence on the table
Bevel Angle 0° 45°
Molding position Left Side Right Side Left Side Right Side
Inside Miter Angle Left at 45° Right at 45° 0° 0°
corner of wall
Molding Bottom Bottom Top against Bottom
position against table against table fence against fence
Finished Keep left Keep right Keep left Keep left
side side of cut side of cut side of cut side of cut
Outside Miter Angle Right at 45° Left at 45° 0° 0°
corner of wall
Molding Bottom Bottom Bottom against Top against
position against table against table fence fence
Finished Keep left Keep right Keep right Keep right
side side of cut side of cut side of cut side of cut
27.
— Crown molding must be cut exactly to fit properly.
— There are two ways to cut crown molding:
flat on table or
angled to table and fence.
— Your miter saw has special miter detents of
31.6° left and right and a bevel detent of 33.9°
for cutting crown molding flat on the table.
— These special detents angles have been
designed into your compound miter saw for the
standard crown molding used in the United
States with the following angles:
52° between the back of the molding and the
top flat surface that fits against the wall.
38° between the back of the molding and the
bottom flat surface that fits against the wall.
NOTE: These detents cannot be used with 45° crown
molding.
— Even though these angles are standards, most
rooms do not have angles of exactly 90°, therefore, you will need to fine tune your settings
using the detent override.
— Cutting crown molding flat on the table can be
done either as a chop cut or a slide cut depending on the width of the workpiece.
Saw Operations
— Base molding can be cut vertical against fence
or flat on the table.
— Follow the table for helpful hints on cutting base
molding.
— Cutting base molding can be done either as a
chop cut or a slide cut depending on the width of
the workpiece.
Cutting Base Molding
Cutting Crown Molding
Left
Right
Right
Left
28.
Saw Operations
Crown Molding Laying Flat on Table
Follow these instructions for cutting crown
molding:
1. Set the bevel and miter angles using Chart 1
below. Tighten the miter lock knob and the
bevel lock handle (Figure 34).
2. Position molding on saw table. Use the chart
below for correct position. Clamp workpiece in
place using the quick clamp.
Use clamping position that does not
interfere with operation. Before
switching on, lower head assembly to make sure
clamp clears guard and head assembly.
3. Follow procedures for either chop cut or slide cut
(see page 23).
4. Wait until blade comes to a complete stop
before returning head assembly to the raised
position and/or removing workpiece.
NOTE: ALWAYS TAKE A TEST CUT USING
SCRAP TO CONFIRM CORRECT ANGLES.
Figure 34. Crown Molding Laying Flat
Chart 1: Crown Molding, Miter and Bevel Settings
WARNING
!
Arbor Lock
Workpiece
Clamp
33.9° Bevel
50
45
40
3
5
3
0
25
20
1
5
10
5
0
30
5
2
20
5
1
0
1
5
Crown
Molding
5
3
31.6° Miter
29.
Crown Molding Angled to
Table and Fence
— The advantage to cutting in this position is
that no bevel setting is required. Cutting is
done with 45° miter angle.
— The maximum crown molding width that can be
cut and angled to table and fence is 4-1/4".
However, there is no practical way to clamp the
molding. The preferred method for cutting crown
molding with this saw is with the molding laying
flat on the table.
Follow these instructions for cutting crown
molding angled to table and fence.
1. Position the molding so the bottom (part which
is installed against the wall) is against the fence.
2. Set the miter angle using Chart 1. Tighten the
miter lock knob (Figure 35).
3. Support crown molding against the fence (see
“Body and Hand Position” on page 19.)
4. Follow the procedures for chop or slide cut (see
page 23).
Figure 35. Crown Molding Angled to
Table and Fence
5. Wait until blade comes to a complete stop
before returning head assembly to the raised
position and/or removing workpiece.
NOTE: ALWAYS TAKE A TEST CUT USING
SCRAP TO CONFIRM CORRECT ANGLES.
Saw Operations
Crown Molding
Angled Against Fence
BOSCH
50
50
45
4
40
0
35
3
30
0
2
5
20
20
1
5
1
10
0
5
10
0
1
5
0
0
1
50
45
40
40
35
30
30
5
2
0
2
20
5
45° Miter
30.
Saw Operations
Cutting bowed material and round material are only
examples of special cuts.
Cutting Bowed Material
If workpiece is bowed or warped,
clamp it with the outside bowed face
toward the fence. Always make certain that there is no
gap between the workpiece, fence and table along the
line of cut. Bent or warped workpieces can twist or
rock and may cause binding on the spinning saw
blade while cutting (Figure 36).
Figure 36. Bowed Material
Special Cuts
Cutting Round or Irregularly
Shaped Material
For round material such as dowel
rods or tubing, always use a clamp
or a fixture designed to clamp the workpiece firmly
against the fence and table. Rods have a tendency to
roll while being cut, causing the blade to “bite” and pull
the work with your hand into the blade (Figure 37).
Figure 37. Round Material
WARNING
!
WARNING
!
Workpiece
Clamp
Fence
BOSCH
No Gap at
this Point
5
0
4
5
40
3
5
3
0
25
2
0
15
10
0
5
Bowed Material
0
5
5
4
0
4
5
3
0
3
Workpiece
Clamp
Fence
BOSCH
5
0
4
5
40
3
5
3
0
25
2
0
15
10
0
5
Round Material
0
5
5
4
0
4
5
3
0
3
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