Dust/Chip Extraction; Operation - Bosch GCM 80 SJ Professional Original Instructions Manual

 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.
Flexible Mounting (not recommended!)
(see figures B1–B2)
In exceptional cases, when it is not possible to mount the ma-
chine onto a level and stable work surface, it can be set up us-
ing the tilt protector.
 Without the metal bar of the tilt protector 33 and the
tilt protector 25, the power tool will not be stable and
can tip over especially when sawing maximum mitre
angles.
– Screw the tilt protector 25 in or out until the machine is po-
sitioned level on the working surface.

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.
 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.
External Dust Extraction
For dust extraction, a vacuum hose (size Ø 35 mm) can also
be connected to the dust ejector 11.
– Connect the vacuum hose with the sawdust ejector 11.
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)
 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.
Bosch Power Tools
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.
– Turn hex socket screw 35 with the hex key (5 mm) 34 and
at the same time press the spindle lock 27 until it engages.
– Hold the spindle lock 27 pressed and unscrew the hex
socket screw 35 in clockwise direction (left-hand thread!).
– Remove the clamping flange 36.
– Press locking switch 15 and swing back the retracting
blade guard 17 to the stop.
– Hold the retracting blade guard in this position and remove
the saw blade 38.
– Slowly guide the retracting blade guard downward again.
Mounting the Saw Blade
If required, clean all parts to be mounted prior to assembly.
– Press locking switch 15, swing back the retracting blade
guard 17 to the stop and hold it in this position.
– Place the new saw blade onto the interior clamping flange
37.
 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!
– Slowly guide the retracting blade guard downward again.
– Place on the clamping flange 36 and the screw 35.
Press the spindle lock 27 until it engages and tighten the
screw turning in anticlockwise direction.
Mounting the oil damper (see figure D)
When sawing combination cuts the supplied oil damper must
be mounted at a certain angle combination (horizontal mitre
angle > 40° and at the same vertical mitre angles > 25°)39.
– Bring the machine into the transport position.
– Screw in the oil damper 39 with the 2 fixing screws 40 into
the provided screw holes on the tool arm and the housing,
using a cross-head screwdriver.

Operation

 Before any work on the machine itself, pull the mains
plug.
Transport Safety (see figure E)
The transport safety-lock 28 enables easier handling of the
machine when transporting to various working locations.
Releasing the Machine (Working Position)
– Push the tool arm by the handle 14 down a little in order to
relieve the transport safety-lock 28.
– Pull the transport safety-lock 28 completely outward.
– Guide the tool arm slowly upward.
English | 23
1 609 92A 0HN | (16.6.14)