Bosch GTM 12 JL Professional User Manual
Page 43
English | 43
Bosch Power Tools
1 609 92A 0BP | (9.7.13)
Adjusting Standard Mitre Angles (see figure
D)
For quick and precise adjustment of commonly used mitre an-
gles, detents 27 have been provided for on the saw table:
– Loosen the locking knob 25 in case it is tightened.
– Pull lever 26 and rotate the saw table 22 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
E)
The mitre angle can be set in the range from 48° (left side) to
48° (right side).
– Loosen the locking knob 25 in case it is tightened.
– Pull lever 26 and at the same time push the locking bracket
43 until it engages in the groove intended for this. The saw
table can be moved freely now.
– Turn the saw table 22 left or right by the locking knob and
adjust the requested mitre angle with help of the fine scale
44. (also see “Adjusting with Help of the Fine Scale”,
page 43)
– Tighten the locking knob 25 again.
Adjusting with Help of the Fine Scale
With the fine scale 44, the horizontal mitre angle can be set
with an accuracy of up to ¼°.
Example: In order to adjust a 40.5° mitre angle, the ½° mark
of the fine scale 44 must be brought into alignment with the
42° mark of scale 23.
Adjusting Standard Bevel Angles (see figure
F)
For quick and precise adjustment of commonly used bevel an-
gles, stops are provided for 0°, 45° and 33.9° angles.
– Loosen the lock lever 36.
– Standard angles 0° and 45°:
Tilt the tool arm by the handle 18 to the right stop (0°) or
to the left stop (45°).
– Standard angle 33.9°:
Push the stop bolt 32 completely inside. Then swivel the
tool arm by the handle 18 until the bolt faces against the
stop screw 31.
– Retighten the lock lever 36 again.
Adjusting Any Bevel Angle (see figure
G)
The bevel angle can be set in the range from –2° to +47°.
– Loosen the lock lever 36.
– Tilt the tool arm by the handle 18 until the angle indicator
45 indicates the desired bevel angle.
– Hold the tool arm in this position and retighten the clamp-
ing lever 36.
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
H)
– For starting operation, press the green ON pushbutton 2
(I).
The tool arm can be guided down only after pushing button
17.
– For sawing button 17 must therefore be pushed addition-
ally.
Switching Off
– Press the red OFF pushbutton 1 (O).
To save energy, only switch the power tool on when using it.
Power Failure
The ON/OFF switch is a so-called non-voltage switch, which
prevents the power tool from restarting after a power failure
(e. g., when the mains plug is pulled during operation).
– To restart the power tool, press the green ON pushbutton
2 again.
Working Advice
General Sawing Instructions
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 possibly
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.
Illuminating the Work Area (see figure
I)
Provide for sufficient lighting of the direct working area.
– For this, switch on the lighting unit 33 with the switch 34.
Marking the Cutting Line (see figure
J)
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 35.
– Align the cutting mark on your workpiece with reference to
the right-hand edge of the laser line.
– Before sawing, check if the cutting line is still indicated cor-
rectly (see “Adjusting the Laser”, page 46). The laser
beam, as an example, can misadjust due to vibrations after
intensive use.
Left
Right
0°
45°
31.6°
22.5° 15°
15°
22.5°
31.6°
45°
Requested setting
of the initial angle
X
Fine scale mark
(scale 44)
... bring into align-
ment with the
mark (scale 23)
X,25°
¼°
X + 1°
X,5°
½°
X + 2°
X,75°
¾°
X + 3°
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