Bosch GBM 32-4 Operations Instructions download pdf (Page 17)

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Bosch Power Tools 1 609 929 M58 | (13.9.07)

Operation

Starting Operation

f 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.

Gear Selection, Mechanical

f Actuate the gear selector 3 only when the

machine is at a standstill.

Four speed ranges can be preselected with the

gear selector 3. Press the gear selector 3 down,

slide it to the requested setting according to the

gearing diagram and allow it to engage at the re-

spective end position.

1st gear:

Low speed range; for working

with large drilling diameter.

2nd gear:

Average speed range.

3rd gear:

Average speed range.

4th gear:

High speed range; for working

with small drilling diameter.

If the gear selector 3 cannot be slid to the stop,

lightly rotate the drive spindle via the drill bit.

Switching On and Off

To start the machine, press the On/Off switch 7

and keep it depressed.

To lock the pressed On/Off switch 7, press the

lock-on button 6.

To switch off the machine, release the On/Off

switch 7 or when it is locked with the lock-on but-

ton 6, briefly press the On/Off switch 7 and then

release it.

Working Advice

Use drilling lubricant or cutting oil for cooling

and lubrication, and to avoid overheating or jam-

ming of the drill bit.

When drilling diameters

>10 mm, drill a pilot

hole with a small drilling diameter. This allows

you to reduce the feed pressure and the power

tool is strained less.

For drilling in metal, use only perfectly sharp-

ened HSS drill bits (HSS=high-speed steel). The

appropriate quality is guaranteed by the Bosch

accessories program.

The machine vice, which is available as an acces-

sory, enables secure clamping of workpieces.

This prevents the workpiece from turning and

any accidents this would cause.

Maintenance and Service

Maintenance and Cleaning

f Before any work on the machine itself, pull

the mains plug.

f For safe and proper working, always keep

the machine and ventilation slots clean.

If the machine should fail despite the care taken

in manufacturing and testing procedures, repair

should be carried out by an after-sales service

centre for Bosch power tools.

In all correspondence and spare parts order,

please always include the 10-digit article number

given on the type plate of the machine.

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