Bosch Professional GST 140 BCE Original Instructions Manual page 11

Moving the base plate (see figure J)
You can move the base plate (6) back for sawing close to
edges.
Open the base plate clamping lever (17) and push the base
plate (6) towards the power cable as far as it will go. Close
the clamping lever to lock the base plate.
Sawing with an offset base plate (6) is only possible with a
mitre angle of 0°. In all other cases the anti-splinter guard
(16) may not be used.
Sawdust blower device
The cutting line can be kept clear of chips using the airflow
from the sawdust blower device.
Switch on the sawdust blower device for work in wood,
plastic, etc. with a high level of material removal. Do this by
sliding the switch (7) to the "I" position.
Switch off the sawdust blower device when working in metal
or with a dust extraction system connected. Do this by slid-
ing the switch (7) to the "0" position.
Starting Operation
Pay attention to the mains voltage. The voltage of the
u
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 the LED worklight
To switch the worklight (12) on or off, press the worklight
button (1).
Do not look directly into the worklight; it can blind
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you.
Switching on and off (GST 140 CE)
Make sure that you are able to press the On/Off switch
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without releasing the handle.
To switch on the power tool, slide the on/off switch (3) for-
wards so that "I" appears on the switch.
To switch off the power tool, slide the on/off switch (3)
backwards so that "0" appears on the switch.
Switching on and off (GST 140 BCE)
Make sure that you are able to press the On/Off switch
u
without releasing the handle.
To switch on the power tool, press the on/off switch (3).
To lock the on/off switch (3), keep it pressed down and
push the locking mechanism (2) to the right or left.
To switch off the power tool, release the on/off switch (3).
If the on/off switch (3) is locked, press the switch first and
then release it.
Restart protection
The restart protection feature prevents the power tool from
uncontrolled starting after the power supply to it has been
interrupted.
To restart the tool, set the on/off switch (3) to the off posi-
tion and then switch the power tool on again.
Bosch Power Tools
Constant Electronic control
The Constant Electronic control keeps the stroke rate at no
load and under load virtually consistent, guaranteeing uni-
form performance.
Controlling the stroke rate (GST 140 BCE)
You can variably adjust the stroke rate of the power tool
when it is on by pressing in the on/off switch (3) to varying
extents.
Applying light pressure to the on/off switch (3) 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
(4).
The required stroke rate is dependent on the material and
the work conditions and can be determined using practical
tests.
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.
Working Advice
Pull the plug out of the socket before carrying out any
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work on the power tool.
Switch the power tool off immediately if the saw blade
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becomes blocked.
When machining small or thin workpieces, always use
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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,
screws, etc.
Plunge cutting (see figure L)
Plunge cuts may only be applied to soft materials,
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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
(6) rests on the workpiece, without the saw blade (11)
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 (6) rests fully on the workpiece,
continue sawing along the required cutting line.
Coolant/lubricant
As the material heats up along the cutting line when cutting
metal, you should apply coolant or lubricant.
English | 11
1 609 92A 50K | (10.05.2019)