Stationary Or Flexible Mounting; Changing The Saw Blade (See Figures B1-B4); Preparing For Operation - Bosch GCD 12 JL Professional Manual Original

OBJ_BUCH-1938-003.book Page 21 Friday, December 16, 2016 9:57 AM

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 figure A)
– Fasten the power tool with suitable screw fasteners to the
working surface. The mounting holes 23 serve for this pur-
pose.
Flexible Mounting (not recommended!)
If, in exceptional circumstances, it is not possible to securely
mount the power tool on a work surface, you can improvise by
placing the feet of the saw-table 25 on an appropriate base
(e.g. work bench, flat ground, etc.), without screwing down
the power tool.
Changing the Saw Blade (see figures B1–B4)
 Before any work on the machine itself, pull the mains
plug.
 Actuate the spindle lock 3 only when the tool spindle is
stopped. Otherwise, the machine can become damaged.
 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. This prevents
overheating of the saw teeth during sawing.
Removing the Saw Blade
– Bring the power tool into the working position. (see "Re-
leasing the Machine (Working Position)", page 21)
– Loosen the fastening screw 26 (approx. 2 turns) with the
Phillips screwdriver 12.
Do not completely unscrew the screw.
– Loosen the fastening screw 27 (approx. 6 turns) with the
Phillips screwdriver 12.
Do not completely unscrew the screw.
– Push the locking lever 1 and swing the retracting blade
guard 4 upwards to the stop.
– Then pull back the retracting guard blade 4 and the cover
plate 21 from the fastening screw 27 until the retracting
guard blade is held by the guide bolt 28 in the bracket 22.
– Turn the hex socket screw 29 with the hex key 12 provided
while at the same time pressing the spindle lock 3 until it
engages.
– Keep the spindle lock 3 pressed and unscrew the Allen
screw 29 in anticlockwise direction.
– Remove the clamping flange 30.
– Remove the saw blade 31.
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
32.
Bosch Power Tools
 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!
– Put on the clamping flange 30 and the screw 29.
Press the spindle lock 3 until it engages and tighten the
screw, turning in a clockwise direction.
– Loosen the spindle lock 3 again. If necessary, pull the knob
by hand all the way up.
– Push the locking lever 1 and slide the retracting blade
guard 4 and the cover plate 21 back under the fastening
screw 27.
– Slowly guide the retracting guard blade 4 downwards until
the saw blade is completely covered again.
– Retighten the fastening screws 27 and 26.
Operation
 Before any work on the machine itself, pull the mains
plug.
Transport Safety (see figure C)
The transport safety-lock 14 enables easier handling of the
machine when transporting to various working locations.
Releasing the Machine (Working Position)
– Push the tool arm by the handle 16 down a little in order to
relieve the transport safety-lock 14.
– Pull the transport safety-lock 14 completely outward.
– Guide the tool arm slowly upward.
Note: When working, pay attention that the transport safety-
lock is not pushed inwards. Otherwise, the tool arm cannot be
lowered to the requested depth.
Securing the Machine (Transport Position)
– Guide the tool arm downward until the transport safety-
lock 14 can be pushed completely inward.
For additional information on transport, see page 23.

Preparing for Operation

Extending the Saw Table (see figure D)
Long workpieces must be underlaid or supported at their free
end.
The saw-table can be extended leftward using the saw-table
extension 11.
– Fold the clamping lever 10 downwards.
– Pull out the saw-table extension 11 to the desired length.
– To lock the saw-table extension, pull the clamping lever 10
back up.
Adjusting the Cutting Angle (see figure E)
The mitre angle can be set in a range from 0° to 45°.
Frequently used mitre angles are identified on the angle stop
6 with appropriate markings. The 0° and 45° position are set
at the respective end stop.
– Loosen the tension handle 13 of the angle stop 6.
– Turn the angle stop 6 until the angle display 33 indicates
the desired miter angle on the scale 34.
– Retighten the tension handle 13.
English | 21
1 609 92A 340 | (16.12.16)