Working Advice - Bosch GCB Professional Serie Notice Originale

OBJ_BUCH-2520-002.book Page 15 Monday, June 20, 2016 8:45 AM
Starting and Stopping (hand-held operation)
(see figure H)
– Switch the toggle switch 2 upward (Position I).
– To start the machine, press the On/Off switch 5 and keep
it pressed.
– To lock the pressed On/Off switch 5, press the lock-on
button 4.
– To switch off the machine, release the On/Off switch 5.
When the On/Off switch is locked on, press the On/Off
switch through until the lock-on is disengaged and then re-
lease the On/Off switch.
Starting and Stopping (Stationary Operation)
(see figure I)
– Press the On/Off switch 5 and lock the pressed On/Off
switch 5 by pressing the lock-on button 4.
– To start the machine, switch the toggle switch 2 upward
(Position I).
– To switch off the machine, switch the toggle switch 2
downward (Position 0).
Switching the "PowerLight" On/Off
The "PowerLight" LED light 13 enables the work area to be il-
luminated in adverse lighting conditions.
– To switch on the light, press the switch 14 to position
.
– To switch off the light, press the switch 14 to position
.

Working Advice

 Do not touch the workpiece before it has cooled down.
The workpiece becomes very hot during sawing.
 Heavy workpieces must be underlaid or supported.
Wear safety shoes. Sawn-off workpieces can injure you
when falling.
Freehand Cutting:
 When working with the machine, always hold it firmly
with both hands and provide for a secure stance. The
power tool is guided more secure with both hands.
Stationary Operation:
 Do not stand in a line with the saw blade in front of the
machine. Always stand aside of the saw blade. Guide
the power tool slowly into cut by the auxiliary handle
using one hand. This protects your body against possible
kickback.
Do not strain the machine so heavily that it comes to a stand-
still.
Excessive feed significantly reduces the performance of the
power tool and the lifetime of the band-saw blade.
Freehand Cutting (see figure J)
 Secure the workpiece. A workpiece clamped with clamp-
ing devices or in a vice is held more secure than by hand.
– For freehand cutting, the band-saw blade 12 must run
between the saw blade guides 18 and the workpiece stop
11 must be pulled out fully:
Insert the band-saw blade accordingly.
If required, loosen both hex socket screws 21 using the
Bosch Power Tools
hex key provided 8 and pull the workpiece stop 11 out ful-
ly. Tighten both hex socket screws again.
– Select the suitable cutting position for your workpiece, so
that as many teeth as possible of the band-saw blade 12
are in the cut. (see figure N)
– Switch on the power tool, position it on the workpiece with
the workpiece stop 11 and lower the band-saw blade 12
slowly into the cut.
– Work with moderate pressure and uniform feed.
– Reduce the pressure just before ending the cut and slightly
raise the machine, so that it does not fall on the workpiece.
Cutting Close to Walls (see figure K)
– For cutting close to walls, the band-saw blade 12 must
run around the saw blade guides 19 and the workpiece
stop 11 must be pushed in fully:
Insert the band-saw blade accordingly.
If required, loosen both hex socket screws 21 using the
hex key provided 8 and push the workpiece stop 11 up-
ward fully. Tighten both hex socket screws again.
– Select the suitable cutting position for your workpiece, so
that as many teeth as possible of the band-saw blade 12
are in the cut. (see figure N)
– Switch on the power tool, position both guide plates 10
flush against the wall and lower the band-saw blade 12
slowly into the cut.
– Work with moderate pressure and uniform feed.
– Reduce the pressure just before ending the cut and slightly
raise the machine, so that it does not fall on the workpiece.
Cutting in Stationary Operation (see figure L)
– For cutting in stationary operation, the band-saw blade
12 must run between the saw blade guides 18 and the
workpiece stop 11 must be pushed in fully:
Insert the band-saw blade accordingly.
If required, loosen both hex socket screws 21 using the
hex key provided 8 and push the workpiece stop 11 up-
ward fully. Tighten both hex socket screws again.
– Select the suitable cutting position for your workpiece, so
that as many teeth as possible of the band-saw blade 12
are in the cut. (see figure N)
Set the desired mitre angle.
Firmly clamp the workpiece as appropriate for its dimen-
sions.
– Switch on the power tool and lower the band-saw blade 12
slowly into the cut.
– Work with moderate pressure and uniform feed.
– Switch off the machine and wait until the band-saw blade
12 has come to a complete stop.
– Guide the power tool slowly upward by the auxiliary handle
6.
Adjusting the Damping of the Tool Arm (see figure M)
You can adjust the spring damping of the tool arm 37 using
the adjusting plate 33:
Mounting hole a (hard) – more controlled work movements;
Mounting hole b (medium) – medium damping;
Mounting hole c (soft) – fast cuts.
– Pull the knob 39 outward and turn the adjusting plate 33
until the small pin engages in the required mounting hole.
English | 15
1 609 92A 39V | (20.6.16)