Manual Bosch PWS 720-115 (page 28 of 166) (English, German, Dutch, Danish, French, Italian, Portuguese, Swedish, Turkish, Spanish, Norwegian, Finnish)

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28 | English

1 609 929 R16 | (14.2.08) Bosch Power Tools

Rough Grinding

f Never use a cutting disc for roughing.

The best roughing results are achieved when

setting the machine at an angle of 30° to 40°.

Move the machine back and forth with moderate

pressure. In this manner, the workpiece will not

become too hot, does not discolour and no

grooves are formed.

Flap Disc

With the flap disc (accessory), curved surfaces

and profiles can be worked.

Flap discs have a considerably higher service

life, lower noise levels and lower sanding tem-

peratures than conventional sanding sheets.

Cutting Metal

f For cutting metal, always work with the pro-

tection guard for cutting 7.

When cutting, work with moderate feed, adapt-

ed to the material being cut. Do not exert pres-

sure onto the cutting disc, tilt or oscillate the

machine.

Do not reduce the speed of running down cut-

ting discs by applying sideward pressure.

The machine must

always work in an

up-grinding mo-

tion. Otherwise,

the danger exists

of it being pushed

uncontrolled out

of the cut.

When cutting profiles and square bar, it is best

to start at the smallest cross section.

Cutting Stone

f For cutting stone, always work with the cut-

ting guide with dust extraction protection

guard 16.

f The machine may be used only for dry cut-

ting/grinding.

For cutting stone, it is best to use a diamond

cutting disc. As a safety measure against jam-

ming, the cutting guide with dust extraction pro-

tection guard 16 must be used.

Operate the machine only with dust extraction

and additionally wear a dust protection mask.

The vacuum cleaner must be approved for the

extraction of masonry dust. Bosch provides suit-

able vacuum cleaners.

Switch on the ma-

chine and place

the front part of

the cutting guide

on the workpiece.

Slide the machine

with moderate

feed, adapted to

the material to be

worked.

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

crete with high pebble content, the diamond

cutting 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

the machine for a short time at maximum speed

with no load.

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 again.

Information on Structures

Slots in structural walls are subject to the

Standard DIN 1053 Part 1, or country-specific

regulations.

These regulations are to be observed under all

circumstances. Before beginning work, consult

the responsible structural engineer, architect or

the construction supervisor.

OBJ_BUCH-393-003.book Page 28 Thursday, February 14, 2008 3:56 PM

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Bosch PWS 720-115 Manual

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