Manual Bosch GWX 9-115 S (page 22 of 311) (All languages)

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22 | English

Speed preselection

(GWX 9-115 S / GWX 9-125 S)

You can preselect the required speed using the speed

preselection thumbwheel (5), even during operation. The in-

formation in the table below describes the recommended

values.

Material Application Application tool Thumbwheel position

Metal Removing paint Abrasive disc 2–3

Metal Brushing, removing rust Cup brush, abrasive disc 3

Metal, stone Grinding Grinding disc 4–6

Metal Rough grinding Grinding disc 6

Metal Cutting Cutting disc 6

The values specified for speed levels are guide values.

uThe rated speed of the accessory must be at least

equal to the maximum speed marked on the power

tool. Accessories running faster than their rated speed

can break and fly apart.

Working Advice

uPull the plug out of the socket before carrying out any

work on the power tool.

uExercise caution when cutting slots in structural walls;

see the "Information on structural design" section.

uClamp the workpiece if it is not secure under its own

weight.

uDo not load the power tool so heavily that it comes to a

stop.

uIf the power tool has been subjected to a heavy load,

continue to run it at no-load for several minutes to

cool down the accessory.

uDo not use the power tool with a cut-off stand.

uDo not touch grinding and cutting discs until they have

cooled down. The discs can become very hot while work-

ing.

Rough grinding

uNever use cutting discs for rough grinding.

The best rough grinding results are achieved with a set angle

of 30° to 40°. Move the power tool back and forth with mod-

erate pressure. This will ensure that the workpiece does not

become too hot or discolour and that grooves are not

formed.

Flap Disc

With the flap disc (accessory), curved surfaces and profiles

can be worked. Flap discs have a considerably higher ser-

vice life, lower noise levels and lower sanding temperatures

than conventional sanding sheets.

Cutting Metal

uAlways use the protective guard for cutting (9) when

cutting bonded abrasives.

When carrying out abrasive cutting, use a moderate feed

that is suited to the material being machined. Do not exert

pressure on the cutting disc and do not tilt or swing the

power tool.

Do not attempt to reduce the speed of a cutting disc coming

to a stop by applying pressure from the side.

The power tool must always

work in an up-grinding mo-

tion. Otherwise, there is a

risk that it will be pushed

uncontrolled out of the cut.

For best results when cut-

ting profiles and rectangular

tubing, start at the smallest

cross section.

Cutting stone

uProvide sufficient dust extraction when cutting stone.

uWear a dust mask.

uThe power tool may be used only for dry cutting/grind-

ing.

For best results when cutting stone, use a diamond cutting

disc.

When using the extraction guard for cutting with a guide

block (18), the vacuum cleaner must be approved for vacu-

uming stone dust. Suitable vacuum cleaners are available

from Bosch.

Switch on the power tool

and position it with the

front part of the guide block

on the workpiece. Move the

power tool with a moderate

feed motion that is suited to

the material being ma-

chined.

When cutting especially

hard materials such as con-

crete with a 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 dia-

mond cutting disc.

If this happens, stop cutting and allow the diamond cutting

disc to cool down by running the power tool for a short time

at maximum speed with no load.

Working noticeably slower and with circular sparking indic-

ate that the diamond cutting disc that has become dull. You

1 609 92A 6KC | (21.05.2021) Bosch Power Tools

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Bosch GWX 9-115 S Manual

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