Manual Bosch PWS 1900 (page 17 of 111) (English, German, Dutch, Danish, French, Italian, Portuguese, Swedish, Turkish, Spanish, Norwegian, Finnish)

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English - 7

Cutting Stone

■ The machine must be used only for dry

cutting/grinding.

It is best to use a dia-

mond cutting disc. As

a safety measure

against jamming, use

the cutting guide 24

with the special dust

extraction protection

guard.

Operate the machine with dust extraction only. In

addition, wear a dust mask.

The vacuum cleaner

must be approved for

the extraction of ma-

sonry dust.

Bosch provides suit-

able vacuum clean-

ers.

Switch on the ma-

chine and place the

front part of the cut-

ting guide on the

workpiece.

Slide the machine with moderate feed, adapted

to the material to be worked (Figure).

For cutting especially hard material, e. g., con-

crete with high pebble content, the diamond cut-

ting disc can overheat and become damaged as

a result. This is clearly indicated by circular

sparking, rotating with the diamond cutting disc.

In this case, interrupt the cutting process and al-

low the diamond cutting disc to cool by running

freely at no-load speed for a short time.

Noticeable decreasing work progress and circu-

lar sparking are indications of a diamond cutting

disc that has become dull. Briefly cutting into

abrasive material (e. g., lime-sand brick) can re-

sharpen the disc.

■ Before any work on the machine itself, pull

the mains plug.

The machine head

can be rotated with

respect to the ma-

chine housing in 90°

steps. In this man-

ner, the On/Off

switch can be

brought to an advan-

tageous handling

position for special

working situations,

e. g., for cutting work

with the cutting guide 24/cutting grinder stand 26

(accessory) or for left-handed persons.

Unscrew completely the four screws.

Rotate the machine head carefully and without

removing from the housing to the new position.

Screw in the screws again and tighten.

■ Before any work on the machine itself, pull

the mains plug.

☞

For safe and proper working, always keep

the machine and the ventilation slots clean.

In extreme working conditions, conductive

dust can accumulate in the interior of the

machine when working with metal. The

protective insulation of the machine can be

degraded. The use of a stationary extrac-

tion system is recommended in such cases

as well as frequently blowing out the venti-

lation slots and installing a residual current

device (RCD).

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 orders,

please always include the 10-digit order number

given on the nameplate of the machine.

Rotating the Machine Head

Maintenance and Cleaning

1 609 929 R44 - Buch Seite 7 Dienstag, 11. März 2008 2:06 14

17 • 1 609 929 R44 • 05.01

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Bosch PWS 1900 Manual

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