Bosch GKS 20-65 User Manual
Robert Bosch Power Tools GmbH
1 609 92A 4JV
70538 Stuttgart
GERMANY
www.bosch-pt.com
1 609 92A 4JV (2018.09) O / 31
GKS 20-65 Professional
en Original instructions
pt Manual de instruções original
es Manual original
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English
Safety instructions
General Power Tool Safety Warnings
WARNING
tions provided with this power tool. Failure to follow all in-
structions listed below may result in electric shock, fire and/
or serious injury.
Save all warnings and instructions for future reference.
The term "power tool" in the warnings refers to your mainsoperated (corded) power tool or battery-operated (cordless) power tool.
Work area safety
u Keep work area clean and well lit. Cluttered or dark
areas invite accidents.
u 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.
u Keep children and bystanders away while operating a
power tool. Distractions can cause you to lose control.
Electrical safety
u Power tool plugs must match the outlet. Never modify
the plug in any way. Do not use any adapter plugs with
earthed (grounded) power tools. Unmodified plugs and
matching outlets will reduce risk of electric shock.
u Avoid body contact with earthed or grounded sur-
faces, such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your
body is earthed or grounded.
u Do not expose power tools to rain or wet conditions.
Water entering a power tool will increase the risk of electric shock.
u Do not abuse the cord. Never use the cord for carry-
ing, pulling or unplugging the power tool. Keep cord
away from heat, oil, sharp edges or moving parts.
Damaged or entangled cords increase the risk of electric
shock.
u When operating a power tool outdoors, use an exten-
sion cord suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of electric shock.
u If operating a power tool in a damp location is un-
avoidable, use a residual current device (RCD) protected supply. Use of an RCD reduces the risk of electric
shock.
Personal safety
u Stay alert, watch what you are doing and use common
sense when operating a power tool. Do not use a
power tool while you are tired or under the influence
of drugs, alcohol or medication. A moment of inatten-
Read all safety warnings, instructions, illustrations and specifica-
tion while operating power tools may result in serious personal injury.
u Use personal protective equipment. Always wear eye
protection. Protective equipment such as a dust mask,
non-skid safety shoes, hard hat or hearing protection
used for appropriate conditions will reduce personal injuries.
u Prevent unintentional starting. Ensure the switch is in
the off-position before connecting to power source
and/or battery pack, picking up or carrying the tool.
Carrying power tools with your finger on the switch or energising power tools that have the switch on invites accidents.
u Remove any adjusting key or wrench before turning
the power tool on. A wrench or a key left attached to a
rotating part of the power tool may result in personal injury.
u Do not overreach. Keep proper footing and balance at
all times. This enables better control of the power tool in
unexpected situations.
u Dress properly. Do not wear loose clothing or jew-
ellery. Keep your hair and clothing away from moving
parts. Loose clothes, jewellery or long hair can be caught
in moving parts.
u If devices are provided for the connection of dust ex-
traction and collection facilities, ensure these are connected and properly used. Use of dust collection can re-
duce dust-related hazards.
u Do not let familiarity gained from frequent use of tools
allow you to become complacent and ignore tool
safety principles. A careless action can cause severe in-
jury within a fraction of a second.
Power tool use and care
u Do not force the power tool. Use the correct power
tool for your application. The correct power tool will do
the job better and safer at the rate for which it was designed.
u Do not use the power tool if the switch does not turn it
on and off. Any power tool that cannot be controlled
with the switch is dangerous and must be repaired.
u Disconnect the plug from the power source and/or re-
move the battery pack, if detachable, from the power
tool before making any adjustments, changing accessories, or storing power tools. Such preventive
safety measures reduce the risk of starting the power tool
accidentally.
u Store idle power tools out of the reach of children and
do not allow persons unfamiliar with the power tool or
these instructions to operate the power tool. Power
tools are dangerous in the hands of untrained users.
u Maintain power tools and accessories. Check for mis-
alignment or binding of moving parts, breakage of
parts and any other condition that may affect the
power tool’s operation. If damaged, have the power
tool repaired before use. Many accidents are caused by
poorly maintained power tools.
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English | 7
u Keep cutting tools sharp and clean. Properly main-
tained cutting tools with sharp cutting edges are less
likely to bind and are easier to control.
u Use the power tool, accessories and tool bits etc. in
accordance with these instructions, taking into account the working conditions and the work to be performed. Use of the power tool for operations different
from those intended could result in a hazardous situation.
u Keep handles and grasping surfaces dry, clean and
free from oil and grease. Slippery handles and grasping
surfaces do not allow for safe handling and control of the
tool in unexpected situations.
Service
u Have your power tool serviced by a qualified repair
person using only identical replacement parts. This
will ensure that the safety of the power tool is maintained.
Safety instructions for circular saws
Cutting procedures
u DANGER: Keep hands away from cutting area and
the blade. Keep your second hand on auxiliary handle,
or motor housing. If both hands are holding the saw,
they cannot be cut by the blade.
u Do not reach underneath the workpiece. The guard
cannot protect you from the blade below the workpiece.
u Adjust the cutting depth to the thickness of the work-
piece. Less than a full tooth of the blade teeth should be
visible below the workpiece.
u Never hold the workpiece in your hands or across your
leg while cutting. Secure the workpiece to a stable
platform. It is important to support the work properly to
minimise body exposure, blade binding, or loss of control.
u Hold the power tool by insulated gripping surfaces,
when performing an operation where the cutting tool
may contact hidden wiring or its own cord. Contact
with a "live" wire will also make exposed metal parts of the
power tool "live" and could give the operator an electric
shock.
u When ripping always use a rip fence or straight edge
guide. This improves the accuracy of cut and reduces the
chance of blade binding.
u Always use blades with correct size and shape (dia-
mond versus round) of arbour holes. Blades that do not
match the mounting hardware of the saw will run offcentre, causing loss of control.
u Never use damaged or incorrect blade washers or
bolt. The blade washers and bolt were specially designed
for your saw, for optimum performance and safety of operation.
Kickback causes and related warnings
- kickback is a sudden reaction to a pinched, jammed or misaligned saw blade, causing an uncontrolled saw to lift up and
out of the workpiece toward the operator;
- when the blade is pinched or jammed tightly by the kerf
closing down, the blade stalls and the motor reaction drives
the unit rapidly back toward the operator;
- if the blade becomes twisted or misaligned in the cut, the
teeth at the back edge of the blade can dig into the top surface of the wood causing the blade to climb out of the kerf
and jump back toward the operator.
Kickback is the result of saw misuse and/or incorrect operating procedures or conditions and can be avoided by taking
proper precautions as given below.
u Maintain a firm grip with both hands on the saw and
position your arms to resist kickback forces. Position
your body to either side of the blade, but not in line
with the blade. Kickback could cause the saw to jump
backwards, but kickback forces can be controlled by the
operator, if proper precautions are taken.
u When blade is binding, or when interrupting a cut for
any reason, release the trigger and hold the saw motionless in the material until the blade comes to a complete stop. Never attempt to remove the saw from the
work or pull the saw backward while the blade is in
motion or kickback may occur. Investigate and take cor-
rective actions to eliminate the cause of blade binding.
u When restarting a saw in the workpiece, centre the
saw blade in the kerf so that the saw teeth are not engaged into the material. If a saw blade binds, it may walk
up or kickback from the workpiece as the saw is restarted.
u Support large panels to minimise the risk of blade
pinching and kickback. Large panels tend to sag under
their own weight. Supports must be placed under the
panel on both sides, near the line of cut and near the edge
of the panel.
u Do not use dull or damaged blades. Unsharpened or im-
properly set blades produce narrow kerf causing excessive friction, blade binding and kickback.
u Blade depth and bevel adjusting locking levers must
be tight and secure before making the cut. If blade adjustment shifts while cutting, it may cause binding and
kickback.
u Use extra caution when sawing into existing walls or
other blind areas. The protruding blade may cut objects
that can cause kickback.
Lower guard function
u Check the lower guard for proper closing before each
use. Do not operate the saw if the lower guard does
not move freely and close instantly. Never clamp or tie
the lower guard into the open position.If the saw is ac-
cidentally dropped, the lower guard may be bent. Raise
the lower guard with the retracting handle and make sure
it moves freely and does not touch the blade or any other
part, in all angles and depths of cut.
u Check the operation of the lower guard spring. If the
guard and the spring are not operating properly, they
must be serviced before use. Lower guard may operate
Bosch Power Tools 1 609 92A 4JV | (20.09.2018)
8 | English
sluggishly due to damaged parts, gummy deposits, or a
build-up of debris.
u The lower guard may be retracted manually only for
special cuts such as "plunge cuts" and "compound
cuts”. Raise the lower guard by the retracting handle
and as soon as the blade enters the material, the lower
guard must be released.For all other sawing, the lower
guard should operate automatically.
u Always observe that the lower guard is covering the
blade before placing the saw down on bench or
floor.An unprotected, coasting blade will cause the saw
to walk backwards, cutting whatever is in its path. Be
aware of the time it takes for the blade to stop after
switch is released.
Additional safety warnings
u Do not allow the chip ejector to come into contact with
your hands. You may be injured by rotating parts.
u Do not use the saw above the level of your head. Doing
so will mean you have inadequate control of the power
tool.
u Use suitable detectors to determine if utility lines are
hidden in the work area or call the local utility company for assistance. Contact with electric lines can lead
to fire and electric shock. Damaging a gas line can lead to
explosion. Penetrating a water line causes property damage or may cause an electric shock.
u Do not operate the power tool when stationary . It is
not suitable for operation with a saw table.
u When performing plunge cuts which are not right-
angled, secure the guide plate of the saw so that it will
not shift sideways.In the event of a sideways shift, the
saw blade may become jammed, which could lead to kickback.
u Do not use HSS saw blades. Such saw blades can easily
break.
u Do not saw any ferrous metals. Hot chips may ignite the
dust extractor.
Products sold in GB only:
Your product is fitted with an BS 1363/A approved electric
plug with internal fuse (ASTA approved to BS 1362).
If the plug is not suitable for your socket outlets, it should be
cut off and an appropriate plug fitted in its place by an authorised customer service agent. The replacement plug
should have the same fuse rating as the original plug.
The severed plug must be disposed of to avoid a possible
shock hazard and should never be inserted into a mains
socket elsewhere.
u Always wait until the power tool has come to a com-
plete stop before placing it down. The application tool
can jam and cause you to lose control of the power tool.
u Hold the power tool firmly with both hands and make
sure you have a stable footing. The power tool can be
more securely guided with both hands.
Product Description and Specifications
Read all the safety and general instructions.
Failure to observe the safety and general instructions may result in electric shock, fire
and/or serious injury.
Please observe the illustrations at the beginning of this operating manual.
Intended use
The power tool is intended for making straight cuts in wood
with and against the grain and mitre cuts in wood while resting firmly against the workpiece.
Product Features
The numbering of the product features refers to the diagram
of the power tool on the graphics page.
On/off switch
(1)
Lock-off switch for on/off switch
(2)
Auxiliary handle (insulated gripping surface)
(3)
Spindle lock button
(4)
Scale for mitre/bevel angles
(5)
Wing bolt for mitre/bevel angle preselection
(6)
Wing bolt for parallel guide
(7)
Cut mark 45°
(8)
Cut mark 0°
(9)
Parallel guide
(10)
Retracting blade guard
(11)
Base plate
(12)
Adjusting lever for retracting blade guard
(13)
Chip ejector
(14)
Protective guard
(15)
Handle (insulated gripping surface)
(16)
Hex key
(17)
Clamping bolt with washer
(18)
Clamping flange
(19)
Circular saw blade
(20)
Mounting flange
(21)
Saw spindle with mounting flange
(22)
Clamping lever for cutting depth preselection
(23)
Cutting depth scale
(24)
Pair of screw clamps
(25)
A)
Accessories shown or described are not included with the
product as standard. You can find the complete selection of
accessories in our accessories range.
B)
Commercially available (not included in the scope of delivery)
A)
B)
A)
1 609 92A 4JV | (20.09.2018) Bosch Power Tools
English | 9
Technical Data
Hand-held circular saw GKS 20-65
Article number
3 601 FB2 0..
Rated power input W 2000
No-load speed rpm 5300
Max. cutting depth with 184mm saw blade diameter
– at a 0° mitre/bevel angle mm 62
– at a 45° mitre/bevel angle mm 46
Spindle lock ●
Base plate dimensions mm 302 x 160
Max. saw blade diameter mm 184
Min. saw blade diameter mm 184
Max. base blade thickness mm 2.0
Locating bore mm 15.9
Weight according to
kg 5.7
EPTA-Procedure 01:2014
Protection class / II
The specifications apply to a rated voltage [U] of 220V. These specifications may vary at different voltages and in country-specific models.
Noise/Vibration Information
Noise emission values determined according
toEN62841-2-5.
Typically, the A-weighted noise level of the power tool is:
Sound pressure level 92dB(A); sound power level
103dB(A). Uncertainty K=3dB.
Wear hearing protection
Total vibration values ah (triax vector sum) and uncertainty K
determined according toEN62841-2-5:
Sawing wood: ah<1.4m/s2, K=1.5m/s
The vibration level and noise emission value given in these
instructions have been measured in accordance with a
standardised measuring procedure detailed in EN 62841
and may be used to compare power tools. They may also be
used for a preliminary estimation of vibration and noise
emissions.
The given vibration level and noise emission value represent
the main applications of the power tool. However, if the
power tool is used for other applications, with different application tools or is poorly maintained, the vibration level
and noise emission value may differ. This may significantly
increase the vibration and noise emissions over the total
working period.
To estimate vibration and noise emissions accurately, the
times when the tool is switched off or when it is running but
not actually being used should also be taken into account.
This may significantly reduce vibration and noise emissions
over the total working period.
Implement additional safety measures to protect the operator from the effects of vibration, such as servicing the
power tool and application tools, keeping the hands warm,
and organising workflows correctly.
2
Fitting
u Only use saw blades the maximum permitted speed of
which is higher than the no-load speed of the power
tool.
Inserting/changing the circular saw blade
u Pull the plug out of the socket before carrying out any
work on the power tool.
u Wear protective gloves when fitting the saw blade.
Danger of injury when touching the saw blade.
u Only use saw blades that match the specifications
given in this operating manual and on the power tool.
u The permitted speed of the application tool must be at
least equal to the maximum speed marked on the
power tool. If accessories run faster than their rated
speed, they may break and fly off.
u Do not use abrasive wheels as the application tool un-
der any circumstances.
Removing the saw blade (see figure A)
To change tools, we recommend that you place the power
tool down on the front side of the motor housing.
– Press and hold the spindle lock button (4).
u Do not press the spindle lock button (4) while the saw
spindle is moving. The power tool may become damaged
if this happens.
– Use the hex key (17) to undo the clamping bolt (18) in ro-
tational direction ➊.
– Swing the retracting blade guard (11) back and hold on
to it firmly.
– Remove the clamping flange (19) and the saw blade (20)
from the saw spindle (22).
Selecting the saw blade
You will find an overview of recommended saw blades at the
end of these operating instructions.
Fitting the saw blade (see figure A)
To change tools, we recommend that you place the power
tool down on the front side of the motor housing.
– Clean the saw blade (20) and all the clamping elements
to be fitted.
– Swing the retracting blade guard (11) back and hold on
to it firmly.
– Place the saw blade (20) on the mounting flange (21).
The cutting direction of the teeth (direction of the arrow
on the saw blade) must match the rotational direction of
the arrow on the protective guard (11).
– Attach the clamping flange (19) and screw in the clamp-
ing bolt in rotational direction ➋. Ensure that the mounting flange (21) and clamping flange (19) are installed in
the correct position.
– Press and hold the spindle lock button (4).
Bosch Power Tools 1 609 92A 4JV | (20.09.2018)
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