Operating Modes; Starting Operation; Working Advice - Bosch GDC 125 Professional Notice Originale

OBJ_BUCH-1810-003.book Page 17 Tuesday, June 4, 2013 1:05 PM
– Place the diamond cutting disc 19 onto the mounting
flange 18. The direction arrow on the diamond cutting disc
19 and the direction-of-rotation arrow on the blade guard
6 must correspond.
– Mount the clamping flange 20 and screw in the clamping
bolt 21.
– Press and hold the spindle lock 13.
– Tighten the clamping bolt 21 (tightening torque 3 –5 Nm)
with the Allen key 22.
Removal of the Diamond Cutting Disc
– Press and hold the spindle lock 13.
– Remove the clamping bolt 21 with the Allen key 22.
– Remove the clamping flange 20 and diamond cutting disc
19 from the drive spindle 17.
Mounting the Hose Kit (see figure B–C)
 For wet cutting, use only water as the cooling liquid.
Only fasten the hose kit to the power tool using the screw and
the spring washer intended for this purpose.
Screw the hose connection 24 onto the water tap or to the
outlet of a water container. In order to reach the correct water
pressure, the water container must be positioned at least
80 cm above the working surface of the power tool.
Mount connection hose 23 onto hose fitting 5. Check the tight
seating by pulling on the connection hose.
Regulate the outflowing water quantity via water tap 25 be-
fore putting the power tool into operation.
The maximum permissible water pressure is 0.12 MPa.
Operation

Operating Modes

 Before any work on the machine itself, pull the mains
plug.
Pre-selecting the Cutting Depth (see figure D)
 The cutting depth may only be pre-selected when the
machine is switched off.
Adapt the cutting depth to the thickness of the workpiece. For
optimum results, the diamond cutting disc must protrude ap-
prox. 2 mm out of the material.
Loosen wing bolt 4. For a smaller cutting depth, pull the ma-
chine from the base plate 8; for a larger cutting depth, push
the machine toward the base plate 8. Adjust the desired cut-
ting depth at the cutting-depth scale 3. Tighten wing bolt 4
again.
Adjusting the Cutting Angle (see figure E)
Loosen wing bolt 8. Tilt the machine sidewards until the de-
sired cutting angle is set on the scale 10. Tighten wing bolt 8
again.
Note: For bevel cuts, the cutting depth is smaller than the set-
ting indicated on the cutting-depth scale 3.
0 cutting mark° (see figure F)
The 0° cutting mark (7) indicates the position of the diamond
cutting disc for straight cuts.
Bosch Power Tools

Starting Operation

 Observe correct mains voltage! The voltage of the pow-
er source must agree with the voltage specified on the
nameplate of the machine. Power tools marked with
230 V can also be operated with 220 V.
Residual Current Device (RCD)
Check the function of the residual current device (RCD) each
time before starting the operation of the tool!
– Switch the power tool off.
– Insert the mains plug and press the RESET button on the
residual current device (RCD) 14 until the indicator 15
lights up red.
– Press the TEST button on the residual current device
(RCD) 14 until the indicator 15 disappears. If the indicator
15 does not disappear, then the residual current device
(RCD) is faulty and must be repaired.Under no circum-
stances work with the power tool!
– Once the indicator 15 goes off, press the RESET button
again.
– Switch on the machine.
Switching On and Off
To start the machine, press the On/Off switch 2 and keep it
pressed.
To lock the pressed On/Off switch 2, press the lock-on button
1.
To switch off the machine, release the On/Off switch 2 or
when it is locked with the lock-on button 1, briefly press the
On/Off switch 2 and then release it.
 Check the diamond cutting discs before use. The dia-
mond cutting disc(s) must be mounted properly and be
able to rotate freely. Carry out a test run for at least one
minute without any load. Do not use diamond cutting
discs that are damaged, out-of-balance, or vibrate.
Damaged diamond cutting discs can rupture and lead to in-
juries.
 The protective rubber sleeve of On/Off switch 2 may
not be damaged. The rubber sleeve protects the On/Off
switch 2 against penetrating water and dust.
To save energy, only switch the power tool on when using it.

Working Advice

 Do not strain the machine so heavily that it comes to a
standstill.
 After heavily straining the power tool, continue to run
it at no-load for several minutes to cool down the acces-
sory.
 For cutting-depths greater than 20 mm in hard materi-
als, e.g., concrete, apply several worksteps so that the
motor is not overloaded.
 Clamp the workpiece if it does not remain stationary
due to its own weight.
 Diamond cutting discs become very hot during opera-
tion; do not touch them until they have cooled down.
Protect the cutting disc against impact, shock and grease. Do
not subject the cutting disc to lateral pressure.
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1 609 92A 0CV | (4.6.13)