Preparing For Operation; Adjusting Mitre Angles; Adjusting Bevel Angles - Bosch GCM 12 SD Professional Manual Original

OBJ_BUCH-1130-003.book Page 30 Friday, December 5, 2014 12:37 PM
30 | English
 Take care during the mounting that the cutting direc-
tion of the teeth (direction of the arrow on the saw
blade) agrees with the direction of the arrow on the re-
tracting blade guard!
– Mount the clamping flange 50, the washer 49 and the hex-
agon bolt 48.
Press spindle lock 42 until it engages and tighten hexagon
bolt 48 with the supplied socket spanner 35 in anticlock-
wise direction with a tightening torque of approx.
15–23 Nm.
– Push the locking lever 43 and guide the retracting blade
guard 10 down again.
– Retighten the screws 47 and 46.
Operation
 Before any work on the machine itself, pull the mains
plug.
Transport Safety (see figure E)
The transport safety-lock 28 enables easier handling of the
machine when transporting to various working locations.
Releasing the Machine (Working Position)
– Push the tool arm by the handle 7 down a little in order to
relieve the transport safety-lock 28.
– Pull the transport safety-lock 28 all the way outward and
turn it by 90°. Allow the transport safety-lock to engage in
this position.
– Guide the tool arm slowly upward.
Securing the Machine (Transport Position)
– Loosen the locking screw 31 if tightened. Pull the tool arm
completely to the front and tighten the locking screw
again.
– Screw the depth stop 58 completely to the top (see "Ad-
justing the Depth Stop", page 32).
– To lock the saw table 18, tighten the locking knob 14.
– Pull the transport safety-lock 28 all the way outward and
turn it by 90°. Allow the transport safety-lock to engage in
this position.
– Push the locking lever 43 and at the same time lower the
tool arm via handle 7 until the transport safety-lock engag-
es in the end position.
The tool arm is now securely locked for transport.

Preparing for Operation

Extending the Saw Table (see figure F)
Long workpieces must be underlaid or supported at their free
end.
– Push tensioning lever 39 upward.
– Pull out saw-table extension 38 to the desired length (max.
225 mm).
– Lock in place by pushing tensioning lever 39 down again.
Extending the Fence (see figure G)
For bevel angles, the fence extensions 21 must be moved.
– Loosen the locking screw 22 and pull the fence extension
21 completely outward.
– Retighten the screw again.
1 609 92A 0XM | (5.12.14)
Clamping the Workpiece (see figure H)
To ensure optimum working safety, the workpiece must al-
ways be firmly clamped.
Do not saw workpieces that are too small to clamp.
 While clamping the workpiece, do not reach under the
clamping lever of the quick-action clamp with your fin-
gers.
– Press the workpiece firmly against the fence 20.
– Insert the quick-action clamp 23 into one of the holes 52
intended for this purpose.
– Adapt the quick-action clamp to the workpiece by turning
the threaded rod 54.
– Push on the clamping lever 53 in order to clamp the work-
piece.

Adjusting Mitre 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).
 Always tighten the locking knob 14 firmly before saw-
ing. Otherwise the saw blade can become wedged in the
workpiece.
Adjusting Standard Mitre Angles (see figure I)
For quick and precise adjustment of commonly used mitre an-
gles, detents 17 have been provided for on the saw table:
Left
0°
15°; 22.5°; 31.6°; 45°; 52° 15°; 22.5°; 31.6°; 45°; 60°
– Loosen the locking knob 14 in case it is tightened.
– Pull lever 15 and rotate the saw table 18 left or right to the
requested detent.
– Release the lever again. The lever must be felt to engage in
the detent.
Adjusting Any Mitre Angle (see figure J)
The mitre angle can be set in the range from 52° (left side) to
60° (right side).
– Loosen the locking knob 14 in case it is tightened.
– Pull lever 15 and at the same time push the locking bracket
13 until it engages in the groove intended for this. The saw
table can be moved freely now.
– Turn the saw table 18 left or right by the locking knob until
the angle indicator 66 indicates the requested mitre angle.
– Tighten the locking knob 14 again.

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 adjustment of commonly used bevel an-
gles, stops are provided for 0°, 45° and 33.9° angles.
Right
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