Dust/Chip Extraction - Bosch GTM 12 JL Professional Originalbetriebsanleitung

Dust/Chip Extraction

Dust 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 dust can cause allergic
reactions and/or lead to respiratory infections of the user or
bystanders.
Certain dust, such as oak or beech dust, is considered carci-
nogenic, especially in connection with wood-treatment addi-
tives (chromate, wood preservative). Materials containing as-
bestos 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. Dust 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 figure c)
For basic dust collection, use the dust bag 8 provided.
 Check and clean the dust bag each time after using.
 When sawing aluminium, remove the dust bag to avoid
the risk of fire.
During sawing, the dust bag must never come into contact
with the movable machine parts.
– Press the clip of the dust bag 8 together and slide the dust
bag over the saw dust ejector 9. The clip must engage into
the groove of the saw dust ejector.
– Always empty the dust bag in good time.
External Dust Extraction
For dust extraction, a vacuum hose (size Ø 36 mm) can also
be connected to the chip ejector 9.
– Connect the vacuum hose with the chip ejector 9.
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.
Mounting Individual Components
 Before any work on the machine itself, pull the mains
plug.
Attaching the Laser Warning Label (see figure d)
The power tool is supplied with a warning label in German lan-
guage (marked with the number 40 in the representation of
the power tool on the graphics page).
– Before operating for the first time, stick the provided warn-
ing label in your national langauge over the text of the Ger-
man warning label.
Bosch Power Tools
Removing or mounting the lower saw blade cover
(see figure e)
During operation as a table saw, the lower saw blade cover 66
must cover the bottom part of the saw blade.
Before using as a chop and mitre saw:
– Remove the lower saw blade cover 66 and slide it into the
groove on the right-hand side of the parallel guide 61.
 Do not throw away the lower saw blade cover! If the low-
er saw blade cover is not used, it is not possible to operate
the combination saw as a table saw!
Before using as a table saw:
– Insert the lower saw blade cover 66 into the saw table 22.
During operation as a table saw, the lower saw blade cover 66
must cover the bottom part of the saw blade.
Changing the Saw Blade (see figures f1–f4)
 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.
Never use dado sets.
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. This prevents
overheating of the saw teeth during sawing.
When changing the saw blade, pay attention that the cutting
width is not smaller and the blade body thickness is not larger
than the thickness of the riving knife.
Removing the Saw Blade
– Bring the power tool into the chop and mitre saw working
position. (see "Working Position", page 42)
– Unscrew the locking screw 10 with the supplied slotted
screwdriver 5.
– Pull the lever 11 toward the right. At the same time, push
the lever upward and rotate the retracting balde guard 20
toward the rear to the stop.
This locks the retracting blade guard in the open position.
– Turn the hex socket screw 12 with the hex key 5 provided
while at the same time pressing the spindle lock 13 until it
engages.
– Hold the spindle lock 13 pressed and unscrew the hex
socket screw 12 in clockwise direction (left-hand thread!).
– Remove the clamping flange 14.
– Remove the saw blade 7.
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
15.
 Take care during the mounting that the cutting direc-
tion of the teeth (direction of the arrow on the saw
English | 41
1 609 92A 1T0 | (28.10.15)