Starting Operation; Working Advice - Bosch GTM 12 JL Professional Originalbetriebsanleitung

– 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 F)
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
45 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
46. (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 46, the horizontal mitre angle can be set
with an accuracy of up to ¼°.
Requested Fine scale mark
setting of the (scale 46)
initial angle X
X.25° ¼°
X.5° ½°
X.75° ¾°
Example: In order to adjust a 40.5° mitre angle, the ½° mark
of the fine scale 46 must be brought into alignment with the
42° mark of scale 23.
Adjusting Standard Bevel Angles
(see figure G1)
For quick and precise adjustment of commonly used bevel an-
gles, stops are provided for 0°, 45° and 33.9° angles.
– Pull the adjustable fence 31 completely outward.
– Loosen the lock lever 37.
– 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 33 completely inside. Then swivel the
tool arm by the handle 18 until the bolt faces against the
stop screw 32.
– Retighten the lock lever 37 again.
Adjusting Any Bevel Angle
(see figure G2)
The bevel angle can be set in the range from –2° to +47°.
– Pull the adjustable fence 31 completely outward.
– Loosen the lock lever 37.
– Tilt the tool arm by the handle 18 until the angle indicator
47 indicates the desired bevel angle.
– Hold the tool arm in this position and retighten the clamp-
ing lever 37.
Bosch Power Tools
... bring into align-
ment with the mark
(scale 23)
X + 1°
X + 2°
X + 3°

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
To save energy, only switch the power tool on when using it.
– 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).
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 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.
Illuminating the Work Area (see figure
Provide for sufficient lighting of the direct working area.
– For this, switch on the lighting unit 34 with the switch 35.
Marking the Cutting Line (see figure
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 36.
– 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 45). The laser
beam, as an example, can misadjust due to vibrations after
intensive use.
Position of the Operator (see figure
 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.
English | 43
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I)
J)
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1 609 92A 1T0 | (28.10.15)