Starting Operation; Working Advice - Bosch GTR 30 CE Professional Originalbetriebsanleitung

OBJ_BUCH-1209-004.book Page 21 Wednesday, March 2, 2011 2:00 PM

Starting Operation

Observe correct mains voltage! The voltage
of the power 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.
Preselecting the Speed
The required speed can be preselected with the
thumbwheel 10 (also while running).
15– 20 Low speed
20 – 25 Medium speed
25 – 30 High speed
After longer periods of working at low speed, al-
low the machine to cool down by running it for
approx. 3 minutes at maximum speed with no
load.
Switching On and Off
Before inserting the mains plug, check if
the On/Off switch 9 is switched off. Other-
wise, the power tool can accidentally start
and lead to injuries.
Adjust the depth-of-cut before switching on or
off; see Section "Adjusting the Depth-of-cut".
To start the power tool, push the On/Off switch
9 forwards.
To lock the On/Off switch 9, press the On/Off
switch 9 down at the front until it latches.
The light 8 is lit when the machine is switched
on, and allows for illumination of the working
range under unfavourable light conditions.
To switch off the power tool, release the On/Off
switch 9 or, if it is locked, briefly push down the
back of the On/Off switch 9 and then release it.
Constant Electronic Control
Constant electronic control holds the speed
constant at no-load and under load, and ensures
uniform working performance.
Soft Starting
The electronic soft starting feature limits the
torque upon switching on and increases the
working life of the motor.
Bosch Power Tools

Working Advice

Routing a Cut-out (see figures H–I)
Take care that the surface is free of any obstruc-
tions.
– Clamp the workpiece.
– While working, hold the power tool firmly by
the handle 12.
– Guide the switched-on power tool toward
the workpiece and plunge into the workpiece
with moderate pressure at an angle of ap-
prox. 30 – 45° with circular motion.
– Slightly move the power tool up and down
alongside the cutting line.
– Carry out the routing process applying uni-
form feed.
– Switch the power tool off. Do not place the
power tool down until the router bit has
come to a standstill.
Routing with the Core Bits (see figures J – L)
The core bit 19 is used for routing/drilling a hole
into a tile or e.g., a wall.
– Clamp the workpiece.
– While working, hold the power tool firmly by
the handle 12.
– Guide the switched-on power tool toward
the workpiece and plunge into the workpiece
with moderate pressure at an angle of ap-
prox. 30 – 45°.
– Slightly move the power tool with circular
motion at an angle of approx. 15°.
– Pay attention not to overheat the core bit 19.
When using core bits with diameters smaller
than 12 mm, provide for sufficient cooling,
e.g., 10 seconds drilling, 5 seconds cooling.
– Switch the machine off as soon as the work-
piece has been drilled through. Do not re-
move or pull out the power tool until after
the router bit has come to a complete stop.
– Work the cut-out blank out of the core bit 19
by applying a screwdriver via the lateral core-
bit openings.
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