Adjusting Bevel Angles; Starting Operation; Working Advice - Bosch GCM 8 SDE Professional Manual Original

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– Tighten the locking knob 21 again.
– To loosen the lever 22 again (for adjusting standard mitre
angles), pull the lever upward.
The locking bracket 20 snaps back to its original position
and lever 22 can re-engage into the detents 25.

Adjusting Bevel Angles

To ensure precise cuts, the basic adjustment of the machine
must be checked and adjusted as necessary after intensive
use (see "Checking and Adjusting the Basic Adjustment",
page 34).
The vertical bevel angle can be adjusted in a range from 47°
(leftward) to 47° (rightward).
For quick and precise setting of frequently used bevel angles,
stops have been provided for the 0°, 45°, 22.5° and 33.9°
angles.
Adjusting Any Bevel Angle (see figure J)
– Pull the stop 46 completely forward.
This enables you to use the complete bevel angle range
(left and right).
– Pull the right-hand adjustable fence 15 completely out-
ward or remove it completely (see "Moving the Fence",
page 31).
If you want to use the complete bevel angle range, you also
have to pull the left-hand adjustable fence 15 completely
outward or remove it completely.
– Loosen clamping lever 43.
– Tilt the tool arm via handle 8 to the left or right until angle
indicator 44 or 33 indicate the desired bevel angle.
– Tighten clamping lever 43 again.
Adjusting Standard Bevel Angles (see figure K)
Standard 0° Bevel Angle :
– Swing the tool arm by the handle 8 slightly to the left and
push the stop 46 completely backward.
Standard bevel angles 45°, 33.9° and 22.5°:
– Turn the left-hand or right-hand stop 31 until the required
standard bevel angle engages at the arrow mark.

Starting Operation

 Observe correct mains voltage! The voltage of the pow-
er source must agree with the voltage specified on the
nameplate of the machine. Power tools marked with
230 V can also be operated with 220 V.
Switching On (see figure L)
To save energy, only switch the power tool on when using it.
– To start the machine, press the On/Off switch 7 and keep
it pressed.
Note: For safety reasons, the On/Off switch 7 cannot be
locked; it must remain pressed during the entire operation.
The tool arm can only be guided downward by pressing lock-
ing switch 9.
– For sawing, the locking switch 9 must be therefore pushed
in addition to pressing the On/Off switch 7.
Switching Off
– To switch off the machine, release the On/Off switch 7.
1 609 92A 0Z4 | (22.10.15)
Reduced starting current
The electronic reduced starting current limits the power con-
sumption when switching the tool on and enables operation
from a 13 ampere fuse.
Note: When the machine runs at full speed immediately after
switching on, the reduced starting current has failed. The
power tool should be sent immediately to an after-sales ser-
vice (for addresses, see section "After-sales Service and Ap-
plication Service", page 35).

Working Advice

General Sawing Instructions
 Always tighten the locking knob 21 and the clamping
lever 43 firmly before sawing. Otherwise the saw blade
can become wedged in the workpiece.
 For all cuts, it must first be ensured that the saw blade
at no time can come in contact with the fence, screw
clamps or other machine parts. Remove any mounted
auxiliary stops or adjust them accordingly.
Protect the saw blade against impact and shock. Do not sub-
ject the saw blade to lateral pressure.
Do not saw warped/bent workpieces. The workpiece must al-
ways have a straight edge to face against the fence.
Long workpieces must be underlaid or supported at their free
end.
Make sure that the retracting blade guard operates properly
and that it can move freely. The retracting blade guard must
open when the tool arm is guided downward. When the tool
arm is guided upward, the retracting blade guard must close
again over the saw blade and lock in the uppermost position
of the tool arm.
Marking the Cutting Line (see figure M)
A laser beam indicates the cutting line of the saw blade. This
allows for exact positioning of the workpiece for sawing, with-
out having to open the retracting blade guard.
– For this, switch the laser beam on with the switch 42.
– Align the cutting mark on your workpiece with reference to
the right-hand edge of the laser line.
Note: Before sawing, check if the cutting line is still indicated
correctly (see "Adjusting the Laser", page 34). The laser
beam, as an example, can misadjust due to vibrations after in-
tensive use.
Position of the Operator (see figure N)
 Do not stand in a line with the saw blade in front of the
machine. Always stand aside of the saw blade. This pro-
tects your body against possible kickback.
– Keep hands, fingers and arms away from the rotating saw
blade.
– Do not cross your arms when operating the tool arm.
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