Bosch GCM 12 GDL Professional Original Instructions Manual page 21

OBJ_BUCH-1464-001.book Page 21 Monday, May 9, 2011 3:47 PM
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.
Prevent dust accumulation at the workplace. Dusts can
easily ignite.
Integrated Dust Extraction (see figure c)
For basic dust collection, use the dust bag 1 provided.
Check and clean the dust bag each time after using.
When sawing aluminium, remove the dust bag to avoid
the risk of fire.
– Insert and turn dust bag 1 onto the extraction adapter 2 in
such a manner that the pin of the extraction adapter engag-
es in the recess of the dust bag.
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 the extraction
adapter 2 to a vacuum hose (Ø 35 mm).
– Insert the vacuum hose into the 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.
Cleaning the Extraction Adapter
To ensure optimum extraction, the extraction adapter 2 must
be cleaned regularly.
– Pull off extraction adapter 2 from sawdust ejector 41 with
a twisting motion.
– Remove workpiece fragments and chippings.
– Mount the extraction adapter onto the sawdust ejector
again with a twisting motion until it engages over the hold-
ing ring of the sawdust ejector.
Changing the Saw Blade (see figures d1
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.
– Unscrew locking screw 42 by hand until the linkage 43 can
hang freely.
Bosch Power Tools
– Loosen fastening screw 44 (approx. 2 turns) with the Al-
len key (4 mm)20.
Do not completely unscrew the screw.
– Loosen the fastening screw 45 (approx. 6 turns) with the
Allen key (4 mm) 20.
Do not completely unscrew the screw.
– Pull cover plate 46 off of fastening screw 45 toward the
front and bottom.
– Press locking lever 5 and swing back the retracting blade
guard 8.
Hold the retracting blade guard in this position.
– Hang linkage 43 over fastening screw 45 via a bolt hole.
This holds the retracting blade guard in the open position.
– Turn Allen screw 48 with the Allen key (6 mm) 20 and at
the same time press the spindle lock 47 until it engages.
– Hold the spindle lock 47 pressed and unscrew the Allen
screw 48 in clockwise direction (left-hand thread!).
– Remove the clamping flange 49.
– Remove the saw blade 40.
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
50.
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!
– Place on the clamping flange 49 and the screw 48.
Press the spindle lock 47 until it engages and tighten the
screw turning in anticlockwise direction.
– Release linkage 43 from fastening screw 45 and guide the
retracting blade guard down again.
– Slide cover plate 46 under fastening screw 45 again.
– Retighten the fastening screws 45 and 44 again.
– Slide linkage 43 onto its original position and retighten
locking screw 42 by hand again.
Operation
Before any work on the machine itself, pull the mains
d4)
–
plug.
Transport Safety (see figure A)
The transport safety-lock 31 enables easier handling of the
machine when transporting to various working locations.
Releasing the Machine (Working Position)
– Slightly push down glide arm 28 by handle 4 to release
transport safety-lock 31.
– Pull the transport safety-lock 31 completely outward.
– Slowly guide the glide arm upward.
Securing the Machine (Transport Position)
– Slide glide arm 28 completely to the rear and secure it in
this position (see "Securing the Glide Arm", page 22).
– Guide the glide arm downward until transport safety-lock
31 can be pushed completely inward.
For additional information on transport, see page 28.
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