Auxiliary Handle; Changing The Tool; Starting Operation - Bosch GBM 23-2 PROFESSIONAL Instrucciones De Servicio

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OBJ_BUCH-1 609 929 H17-001.book Seite 4 Mittwoch, 29. September 2004 9:40 09
Assembly

Auxiliary Handle

Operate your machine only with the auxiliary
handle 2.
Screw the auxiliary handle 2 into the thread 8 on the
gear head.

Changing the Tool

Before any work on the machine itself, pull the
mains plug.
Drilling tools with a MK2 morse taper can be inserted
directly into the tool holder 4. For drill bits with MK1
morse taper, use the reducing sleeve 10.
Pay attention that the morse cone and the morse taper
are free of grease.
The use of drilling tools with cylindrical shank is possi-
ble with the key chuck 12. For this, place the tapered
arbor 11 into the tool holder 4 and firmly screw on the
key chuck 12.
Do not exert any force when inserting the morse
taper or the tapered arbor. This can damage the tool
holder and the inserted tool.
Before removing the inserted tool, unscrew the auxiliary
handle 2.
Place the drift 9 into the opening 3 in such a manner
that the rounded-off side faces to the pressure plate 1.
If the drift 9 cannot be inserted through the drive spin-
dle, turn the tool insert a little.
Press the drift 9 toward the pressure plate 1 and
release the tool insert from out of the tool holder.
Operation

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.
Switching On and Off
To start the machine, press the On/Off switch 6 and
keep it depressed.
Lock the pushed On/Off switch 6
by pushing the lock-on button 5
upward.
1 609 929 H17 • 29.9.04
To switch off the machine, release the On/Off switch
6 or when it is locked with the lock-on button 5, briefly
press the On/Off switch 6 and then release it.
Adjusting the Speed (GBM 23-2 E)
The machine runs with variable speed, depending on
the pressure applied on the On/Off switch 6.
Light pressure on the On/Off switch 6 results in a low
rotational speed. Further pressure on the switch results
in an increase in speed.
Gear Selection, Mechanical
Actuate the gear selector 7 only when the machine is at
a standstill.
Two speed ranges can be preselected with the gear
selector 7.
1st gear:
Low speed range; for working with large
drilling diameter.
2nd gear:
Higher speed range; for working with
small drilling diameter.
If the gear selector 7 cannot be fully engaged, lightly
rotate the drive spindle with the drill bit by twisting the
drill chuck.
Operating Instructions
Tips
For drilling in metal, use only perfectly sharpened HSS
drill bits (HSS=high-speed steel). The appropriate
quality is guaranteed by the Bosch accessories pro-
gram.
The machine vice, which is available as an accessory,
enables secure clamping of workpieces. This prevents
the workpiece from turning and any accidents this
would cause.
English–4

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