Bosch GDB 2500 WE Professional - Manual (Page 16)

16 | English
1 609 929 W83 | (9.11.10) Bosch Power Tools
Assembly
f Before any work on the machine itself, pull
the mains plug.
Clamping the Machine in the S 500 A
Diamond-drill Stand
f The safety and operating instructions for
the drill stand being used are to be strictly
observed!
For mounting the power tool into the drill stand,
please read and observe the operating instruc-
tions of the drill stand.
Inserting/Replacing the Core Bit
f Before any work on the machine itself, for
longer work breaks, as well as when not us-
ing, secure the power tool against uninten-
tional motion by engaging the feed lock. For
this, read and observe the operating instruc-
tions of the drill stand.
Inserting a Core Bit
f
Examine the core bit before inserting it.
Use only core bits that are in perfect condi-
tion. Damaged or deformed core bits can
lead to dangerous situations.
Clean the core bit before inserting it. Apply a
light coat of grease to the core bit thread or
spray on a corrosion protection agent.
Either screw a G 1/2" core bit into drill spindle
9 or a 1 1/4" UNC core bit onto drill spindle 9.
f
Check the proper seating of the core bit. In-
correctly or unsecurely fastened core bits
can become loose during operation and may
pose a danger.
Inserting a sliding ring 8 (accessory) between
the drill spindle and the 1 1/4"-UNC core bit pro-
vide for easier loosening of the core bit after
use.
Removing a Core Bit
f
Wear protective gloves when replacing the
core bit. The core bit can become hot after
prolonged operation of the power tool.
Loosen core bit 7 with an open-end spanner
(1 1/4" UNC core bit: Spanner size, 41 mm;
G 1/2" core bit: Spanner size, 22 mm). When do-
ing this, counter-hold the bore spindle 9 by the
flats using a second open-end spanner (spanner
size, 36 mm).
Connecting the Water Cooling
When wet-drilling core bits are not sufficiently
cooled during drilling, the diamond segments
can become damaged or the core bit can be-
come jammed in the bore hole. Therefore, pro-
vide for a sufficient water supply during wet
drilling.
When boring out a given bore, the given bore
must be carefully plugged in order to enable suf-
ficient cooling of the core bit.
f
Connected hoses, shut-off valves or acces-
sories must not obstruct or hinder the drill-
ing process.
Shut the water cock 11. Connect water supply
to the water-outlet connector 3. The water sup-
ply is possible either via a mobile water-pres-
sure container (accessory) or via stationary wa-
ter connection.
In order to collect the water coming out of the
bore during wet-drilling, a water collection ring
and a multi-purpose vacuum cleaner are re-
quired (both accessories).
For assembly of the water collection ring, read
and observe its operating instructions.
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