GST 90 E Professional - Scie BOSCH - Free user manual and instructions

USER MANUAL GST 90 E Professional BOSCH

– in Aluminium mm 20 20

General Power Tool Safety Warnings

WARNING Read all safety warnings, instruc-

tions, illustrations and specifica-

tions provided with this power tool. Failure to follow all in-

structions listed below may result in electric shock, fire and/

Save all warnings and instructions for future reference.

The term "power tool" in the warnings refers to your mains-

operated (corded) power tool or battery-operated (cord-

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 refrigerat-

ors. There is an increased risk of electric shock if your

body is earthed or grounded. 1 609 92A 4V4 | (23.04.2019) Bosch Power ToolsEnglish | 13

u Do not expose power tools to rain or wet conditions.

Water entering a power tool will increase the risk of elec-

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

u When operating a power tool outdoors, use an exten-

sion cord suitable for outdoor use. Use of a cord suit-

able 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) protec-

ted supply. Use of an RCD reduces the risk of electric

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-

tion while operating power tools may result in serious per-

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 in-

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 en-

ergising power tools that have the switch on invites acci-

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 in-

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

u If devices are provided for the connection of dust ex-

traction and collection facilities, ensure these are con-

nected 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 de-

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 ac-

cessories, or storing power tools. Such preventive

safety measures reduce the risk of starting the power tool

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.

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 ac-

count the working conditions and the work to be per-

formed. 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.

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 jigsaws

u Hold the power tool by insulated gripping surfaces,

when performing an operation where the cutting ac-

cessory may contact hidden wiring or its own cord.

Cutting accessory contacting a "live" wire may make ex-

posed metal parts of the power tool "live" and could give

the operator an electric shock.

u Use clamps or another practical way to secure and

support the workpiece to a stable platform. Holding

the workpiece by hand or against your body leaves it un-

stable and may lead to loss of control.

u Keep hands away from the sawing area. Do not reach

under the workpiece. Contact with the saw blade can

u Only bring the power tool into contact with the work-

piece when switched on. Otherwise there is danger of

kickback if the cutting tool jams in the workpiece.

Bosch Power Tools 1 609 92A 4V4 | (23.04.2019)14 | English u Ensure that the footplate always rests securely while sawing. A jammed saw blade can break or lead to kick-

back. u When the cut is completed, switch off the power tool and then pull the saw blade out of the cut only after it

has come to a standstill. In this manner you can avoid

kickback and can place down the power tool securely. 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 Use only undamaged saw blades that are in perfect condition. Bent or dull saw blades can break, negatively

influence the cut, or lead to kickback. u Do not brake the saw blade to a stop by applying side pressure after switching off. The saw blade can be dam-

aged, break or cause kickback. u Use suitable detectors to determine if utility lines are hidden in the work area or call the local utility com-

pany 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 dam-

age or may cause an electric shock.

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 au-

thorised 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

Product Description and

Read all the safety and general instructions.

Failure to observe the safety and general in-

structions may result in electric shock, fire

and/or serious injury.

Please observe the illustrations at the beginning of this oper-

The power tool is intended for making separating cuts and

cut-outs in wood, plastic, metal, ceramic plates and rubber

while resting firmly on the workpiece. It is suitable for

straight and curved cuts with mitre/bevel angles of up to

45°. Note the saw blade recommendations.

The numbering of the product features refers to the diagram

of the power tool on the graphics page.

On/off switch locking mechanism (GST90BE)

Stroke rate preselection thumbwheel

SDS lever for saw blade release

Handle (insulated gripping surface)

Hood for dust extraction

Locking screw for parallel guide

Parallel guide with circle cutter

Accessories shown or described are not included with the

product as standard. You can find the complete selection of

accessories in our accessories range.

Jigsaw GST 90 E GST 90 BE Article number

Stroke rate control ● ●

Rated power input W 650 650

No-load stroke rate n

Jigsaw GST 90 E GST 90 BE

– In steel (unalloyed) mm 10 10

Max. cutting angle (left/right) ° 45 45

Weight according to EPTA-Procedure 01:2014 kg 2.3 2.6

/II /II The specifications apply to a rated voltage [U] of 230 V. These specifications may vary at different voltages and in country-specific models.

Noise/Vibration Information

GST 90 E GST 90 BE Noise emission values determined according to EN62841-2-11.

Typically, the A-weighted noise level of the power tool is:

(triax vector sum) and uncertainty K determined according to EN62841-2-11:

Cutting boards with saw bladeT144DF:

The vibration level and noise emission value given in these

instructions have been measured in accordance with a

standardised measuring procedure and may be used to com-

pare power tools. They may also be used for a preliminary

estimation of vibration and noise emissions.

The stated vibration level and noise emission value repres-

ent the main applications of the power tool. However, if the

power tool is used for other applications, with different ap-

plication 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

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 oper-

ator from the effects of vibration, such as servicing the

power tool and application tools, keeping their hands warm,

and organising workflows correctly.

Assembly u Pull the plug out of the socket before carrying out any work on the power tool.

Inserting/changing the saw blade u When fitting or changing the saw blade, wear protect- ive gloves. Blades are sharp and can become hot when

used for prolonged periods of time.

Selecting the saw blade

You will find an overview of recommended saw blades at the

end of these operating instructions. Only use saw blades

with single lug shank (T shank). The saw blade should not be

longer than required for the intended cut.

Use a narrow saw blade when sawing tight curves.

Inserting the saw blade (seefigure A) u Clean the shaft on the saw blade before inserting it. Adirty shaft cannot be securely fixed in place.

Press the SDS lever(8) forward to the stop and hold it

down. Push the saw blade(10), with the teeth in the cutting

direction, into the saw blade receptacle (13) until it clicks

Make sure when inserting the saw blade that the back of the

saw blade is in the groove on the guide roller (9). u Check that the saw blade is seated securely. A loose saw blade can fall out and lead to injuries.

Removing the saw blade (seefigureB)

Push the SDS lever(8) all the way forwards and remove the

Bosch Power Tools 1 609 92A 4V4 | (23.04.2019)16 | English

Anti-splinter guard (see figureC)

The anti-splinter guard (14) (accessory) can prevent splin-

tering of the surface while sawing wood. The anti-splinter

guard can only be used with certain saw blade types and only

at a cutting angle of 0°. When sawing with the anti-splinter

guard, the base plate (5) must not be moved to the rear for

sawing close to edges.

Push the anti-splinter guard (14) into the base plate (5)

Dust/Chip Extraction

The dust from materials such as lead paint, some types of

wood, minerals and metal can be harmful to human health.

Touching or breathing in this dust can trigger allergic reac-

tions and/or cause respiratory illnesses in the user or in

people in the near vicinity.

Certain dusts, such as oak or beech dust, are classified as

carcinogenic, especially in conjunction with wood treatment

additives (chromate, wood preservative). Materials contain-

ing asbestos may only be machined by specialists.

– Use a dust extraction system that is suitable for the ma-

terial wherever possible.

– Provide good ventilation at the workplace.

– It is advisable to wear a P2 filter class breathing mask.

The regulations on the material being machined that apply in

the country of use must be observed.

u Avoid dust accumulation at the workplace. Dust can

Fit the hood (15) before you connect the power tool to the

dust extraction system.

Attach the hood(15) to the power tool so that the bracket

locks into place on the shock protection guard(11).

Remove the hood(15) when working without a dust extrac-

Fit the extraction outlet(16) in the recesses of the base

Ensure that the cam on the extraction outlet slots into the

corresponding recess in the power tool as shown in the fig-

Connect a dust extraction hose (17) (accessory) to the ex-

traction outlet (16). Connect the dust extraction hose (17)

to a dust extractor (accessory).

You will find an overview of connecting to various dust ex-

tractors at the end of these operating instructions.

For optimum dust extraction, where possible use the anti-

splinter guard (14).

Switch off the sawdust blower device when you have con-

nected the dust extraction system.

The dust extractor must be suitable for the material being

When extracting dry dust that is especially detrimental to

health or carcinogenic, use a special dust extractor.

u Products that are only sold in AUS and NZ: Use a resid-

ual current device (RCD) with a nominal residual current

u Pull the plug out of the socket before carrying out any

work on the power tool.

Pendulum action settings

The pendulum action can be adjusted using four different

settings, allowing the cutting speed, cutting capacity and the

cut itself to be optimally adapted to the material that you

You can also adjust the pendulum action during operation

LevelIII High pendulum action

The optimum pendulum level for each application can be de-

termined by a practical test. Note the following recommend-

– Select a lower pendulum level or switch off the pendulum

action completely if you wish to produce a finer or cleaner

– Switch off the pendulum action when machining thin ma-

– Work on hard materials (e.g. steel) with low pendulum ac-

– You can work on soft materials and saw wood in the direc-

tion of the grain using maximum pendulum action.

Adjusting the mitre/bevel angle (seefigureG)

The base plate (5) can be swivelled to the right or left to

make mitre cuts up to 45°.

The hood(15), the extraction outlet(16) and the anti-

splinter guard(14) cannot be used while mitre/bevel cuts

– Push the extraction outlet(16) downwards slightly and

pull it out of the base plate(5).

– Remove the hood(15) and the anti-splinter guard(14).

– Undo the screw (19) using the hex key(4) and push the

base plate (5) slightly towards the mains cable.

– The base plate has lock-in points at 0° and 45° on the left

and right so that precise mitre/bevel angles can be set.

Swivel the base plate(5) to the required position accord-

ing to the scale(18). Other mitre/bevel angles can be ad-

justed using a protractor.

– Then push the base plate(5) towards the saw blade(10)

as far as it will go.

– Retighten the screw (19).

1 609 92A 4V4 | (23.04.2019) Bosch Power ToolsEnglish | 17

Moving the base plate (seefigure G)

You can move the base plate (5) back for sawing close to

Loosen the screw (19) and push the base plate (5) towards

the mains cable as far as it will go.

Retighten the screw (19).

Sawing with an offset base plate (5) is only possible with a

mitre/bevel angle of 0°. In addition, the parallel guide with

circle cutter(22) (accessory) as well as the anti-splinter

guard(14) must not be used.

Sawdust blower device

The cutting line can be kept clear of chips using the airflow

from the sawdust blower device.

To switch on the sawdust blower device:

When working with high material removal in

wood, plastic and other similar materials,

push the switch (6) towards the extraction

To switch off the sawdust blower device:

When working in metal and with a dust extrac-

tion system connected, push the switch (6)

towards the saw blade.

u Pay attention to the mains voltage. The voltage of the

power source must match the voltage specified on the

rating plate of the power tool. Power tools marked

with 230V can also be operated with 220V.

Switching On and Off (GST90E)

u Make sure that you are able to press the On/Off switch

without releasing the handle.

To switch on the power tool, slide the on/off switch(2) for-

wards so that "I" appears on the switch.

To switch off the power tool, slide the on/off switch(2)

backwards so that "0" appears on the switch.

Switching On and Off (GST90BE)

u Make sure that you are able to press the On/Off switch

without releasing the handle.

To switch on the power tool, press the on/off switch (2).

To lock the on/off switch (2), keep it pressed down and

push the locking mechanism (1) to the right or left.

To switch off the power tool, release the on/off switch (2).

If the on/off switch (2) is locked, press the switch first and

Controlling the stroke rate (GST90BE)

You can variably adjust the stroke rate of the power tool

when it is on by pressing in the on/off switch (2) to varying

Applying light pressure to the on/off switch (2) results in a

low stroke rate. Applying increasing pressure to the switch

increases the stroke rate.

Preselect the stroke rate

You can also preselect the stroke rate and change it during

operation using the stroke rate preselection thumbwheel

The required stroke rate is dependent on the material and

the work conditions and can be determined using practical

It is recommended that you reduce the stroke rate when

placing the saw blade on the workpiece and when sawing

plastic and aluminium.

During prolonged periods of use at a low stroke rate, the

power tool may heat up significantly. Remove the saw blade

and let the power tool run at the maximum stroke rate for

around three minutes to cool down.

u Pull the plug out of the socket before carrying out any

work on the power tool.

u Switch the power tool off immediately if the saw blade

u When machining small or thin workpieces, always use

a stable base or saw table (accessory).

Before sawing into wood, chipboard, building materials,

etc., check for and remove any foreign objects such as nails,

Plunge cutting (see figureH)

u Plunge cuts may only be applied to soft materials,

such as wood, gypsum board, etc.

For plunge cutting, use only short saw blades. Plunge cutting

is possible only with a mitre angle of 0°.

Place the power tool so that the front edge of the base plate

(5) rests on the workpiece, without the saw blade (10)

touching the workpiece, and switch it on. On power tools

with stroke rate control, select the maximum stroke rate.

Press the power tool firmly against the workpiece and allow

the saw blade to plunge slowly into the workpiece.

As soon as the base plate (5) rests fully on the workpiece,

continue sawing along the required cutting line.

Parallel guide with circle cutter (accessory)

When working with the parallel guide with circle cutter (22)

(accessory), the workpiece must be no more than 30mm

Parallel cuts (see figureI): Loosen the locking screw (21)

and slide the scale on the parallel guide through the guide

(20) in the base plate. Adjust the desired cutting width as a

scale value on the inside edge of the base plate. Retighten

the locking screw (21).

Circular cuts (see figureJ): Drill a hole large enough to push

the saw blade through on the cutting line within the circle to

be cut. Machine the drill hole with a router or file so that the

saw blade can lie flush with the cutting line.

Position the locking screw (21) on the other side of the par-

allel guide. Slide the scale on the parallel guide through the

guide (20) into the base plate. Drill a hole in the workpiece

in the middle of the section to be cut out. Insert the centring

Bosch Power Tools 1 609 92A 4V4 | (23.04.2019)18 | English

tip (23) through the inner opening of the parallel guide and

into the drilled hole. Adjust the radius as a scale value on the

inside edge of the base plate. Retighten the locking screw

As the material heats up along the cutting line when cutting

metal, you should apply coolant or lubricant.

Maintenance and Service

Maintenance and Cleaning

u Pull the plug out of the socket before carrying out any

work on the power tool.

u To ensure safe and efficient operation, always keep

the power tool and the ventilation slots clean.

In order to avoid safety hazards, if the power supply cord

needs to be replaced, this must be done by Bosch or by an

after-sales service centre that is authorised to repair Bosch

Clean the saw blade receptacle regularly. For this, remove

the saw blade from the power tool and lightly tap out the

power tool on a level surface.

If the power tool becomes very dirty, this can lead to serious

faults. For this reason, do not cut materials which generate

large quantities of dust from below or overhead.

u In extreme conditions, always use a dust extractor if

possible. Blow out ventilation slots frequently and in-

stall a residual current device (RCD) upstream. When

machining metals, conductive dust can settle inside the

power tool, which can affect its protective insulation.

If the dust outlet becomes blocked, switch off the power

tool, disconnect the dust extraction system and remove the

Apply a drop of oil to the guide roller (9) from time to time.

Check the guide roller(9) regularly. If worn, it must be re-

placed through an authorised Bosch after-sales service

After-Sales Service and Application Service

Our after-sales service responds to your questions concern-

ing maintenance and repair of your product as well as spare

parts. You can find explosion drawings and information on

spare parts at: www.bosch-pt.com

The Bosch product use advice team will be happy to help you

with any questions about our products and their accessor-

In all correspondence and spare parts orders, please always

include the 10‑digit article number given on the nameplate

Robert Bosch Ltd. (B.S.C.)

UB 9 5HJ At www.bosch-pt.co.uk you can order spare parts or arrange

the collection of a product in need of servicing or repair.

Tel. Service: (0344) 7360109

Australia, New Zealand and Pacific Islands

Robert Bosch Australia Pty. Ltd.

Customer Contact Center

Republic of South Africa

Hotline: (011) 6519600

35 Roper Street, New Centre

E-mail: bsctools@icon.co.za

KZN – BSC Service Centre

Unit E, Almar Centre

E-mail: bsc.dur@za.bosch.com

Western Cape – BSC Service Centre

Democracy Way, Prosperity Park

The power tool, accessories and packaging should be re-

cycled in an environmentally friendly manner.

Do not dispose of power tools along with

Only for EU countries:

According to the European Directive 2012/19/EU on Waste

Electrical and Electronic Equipment and its implementation

into national law, power tools that are no longer usable must

be collected separately and disposed of in an environment-

ally friendly manner.

– in aluminium mm 20 20

Bosch Service Center

Bosch Service Center

Açma/Kapatma (GST90E)

Açma/Kapatma (GST90BE)

Robert Bosch Sp. z o.o.

Robert Bosch SRL Service scule electrice

www.bosch-pt.com/bg/bg/

for special materials

EU Declaration of Conformity

We declare under our sole responsibility that the stated products comply

with all applicable provisions of the directives and regulations listed below

and are in conformity with the following standards.

Technical file at: *

Executive Management

Head of Product Certification