Bosch GCM 12 JL Professional User Manual

Page 31

English | 31

Bosch Power Tools

1 619 929 L91 | (6.8.12)

Stationary or Flexible Mounting

To ensure safe handling, the machine must be mounted

on a level and stable surface (e. g., workbench) prior to

using.

Mounting to a Working Surface (see figures A1 – A2)
– Fasten the power tool with suitable screw fasteners to the

working surface. The mounting holes 8 serve for this pur-

pose.

or
– Clamp the power tool with commercially available screw

clamps by the feet to the working surface.

Mounting to a Bosch Saw Stand
With the height-adjustable legs, Bosch GTA saw stands pro-

vide firm support for the power tool on any surface. The work-

piece supports of the saw stand are used for underlaying long

workpieces.
f

Read all safety warnings and instructions included with

the worktable. Failure of observing safety warnings and

instructions can lead to electrical shock, fire and/or cause

serious injuries.

Assemble the worktable properly before mounting the

power tool. Perfect assembly is important in order to pre-

vent the risk of collapsing.

– Mount the power tool in transport position on the saw

stand.

Dust/Chip Extraction

Dusts from materials such as lead-containing coatings, some

wood types, minerals and metal can be harmful to one’s

health. Touching or breathing-in the dusts can cause allergic

reactions and/or lead to respiratory infections of the user or

bystanders.

Certain dusts, such as oak or beech dust, are considered as

carcinogenic, especially in connection with wood-treatment

additives (chromate, wood preservative). Materials contain-

ing asbestos may only be worked by specialists.
– Always use dust extraction.

– Provide for good ventilation of the working place.

– It is recommended to wear a P2 filter-class respirator.
Observe the relevant regulations in your country for the mate-

rials to be worked.
f

Prevent dust accumulation at the workplace. Dusts can

easily ignite.

The dust/chip extraction can be blocked by dust, chips or

workpiece fragments.
– Switch the machine off and pull the mains plug from the

socket outlet.

– Wait until the saw blade has come to a complete stop.

– Determine the cause of the blockage and correct it.
Integrated Dust Extraction (see figures B1–B2)
For basic dust collection, use the dust bag 1 provided.
f

Check and clean the dust bag each time after using.

When sawing aluminium, remove the dust bag to avoid

the risk of fire.

– Mount the dust bag 1 onto the sawdust ejector 45.

or when space conditions are limited:
– Firstly, mount extraction adapter 2 firmly onto sawdust

ejector 45 and then mount dust bag 1 firmly onto extrac-

tion adapter 2.

During sawing, the dust bag and the extraction adapter may

never come in contact with moving tool components.
Always empty the dust bag in good time.
External Dust Extraction
For dust extraction, you can also connect a vacuum hose to

sawdust ejector 45 or extraction adapter 2.
– Insert the vacuum hose firmly into sawdust ejector 45 or

extraction adapter 2.

The vacuum cleaner must be suitable for the material being

worked.
When vacuuming dry dust that is especially detrimental to

health or carcinogenic, use a special vacuum cleaner.

Changing the Saw Blade (see figures C1

–

C4)

Before any work on the machine itself, pull the mains

plug.

When mounting the saw blade, wear protective gloves.

Danger of injury when touching the saw blade.

Use only saw blades whose maximum permitted speed is

higher than the no-load speed of the power tool.
Use only saw blades that correspond with the characteristic

data given in these operation instructions and that are tested

and marked in accordance with EN 847-1.
Use only saw blades recommended by the tool manufacturer,

and suitable for sawing the materials to be cut.
Removing the Saw Blade
– Bring the power tool into the working position.

– Press lever 22 and tilt the retracting blade guard 5 up to

the stop.

Hold the retracting blade guard in this position.

– Loosen fastening screw 46 (approx. 4 turns) with the Al-

len key (4 mm) 17.

Do not completely unscrew the screw.

– Pull the retracting blade guard 5 and the cover plate 36

completely back until the retracting blade guard is held by

laser protection cap 35.

– Turn Allen screw 47 with the Allen key (6 mm) 17 and at

the same time press the spindle lock 21 until it engages.

– Hold the spindle lock 21 pressed and unscrew the Allen

screw 47 in clockwise direction (left-hand thread!).

– Remove the clamping flange 48.

– Remove the saw blade 37.
Mounting the Saw Blade
If required, clean all parts to be mounted prior to assembly.
– Place the new saw blade onto the interior clamping flange

49.

When mounting the saw blade, pay attention that the

cutting direction of the teeth (arrow direction on the

saw blade) corresponds with the direction of the arrow

on the blade guard!

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