Installing Bits - Bosch GCU18V-30 Operating/Safety Instructions Manual

Changing the Collet
The tool includes 1/8", 5/32", and 1/4" collets.
The 1/8" collet is used with 1/8" diameter bits,
the 5/32" collet is used with 5/32" diameter bits
and the 1/4" collet is used with 1/4" diameter
bits.
To change collets, press and hold the spindle
lock button (Figure 3, 8). If necessary, turn the
motor spindle (with collet nut) manually until it
is locked in place.
Next, unscrew the collet nut (12) with the pro-
vided wrench (13) by turning it in the direction
of rotation and then release the spindle lock
1
button.
Place the desired collet in the output shaft (14).
Each collet is double-ended and either end is ac-
ceptable to use.
Ensure that the collet (11) is fully inserted in the
output shaft and has a small amount of play. The
collet nut (12) must be easy to fit. If the collet
nut or collet is damaged, replace it immediately.
Next, hand tighten the collet nut (12) by turning
in the direction of rotation

Installing Bits

The bit flutes are sharp and
should be handled with cau-
tion. Contact with bit flutes could result in mi-
nor or moderate injury.
To prevent damage to tool, never use the spin-
dle lock as a braking device to stop the tool
from rotating.
Never tighten the collet with the collet nut if
there is not a bit installed. The collet may oth-
erwise become damaged.
The tool accepts spiral type bits, standard multi-
purpose bits, and standard drywall bits.
The bits are held by a collet system. Use either
the 1/8", 5/32", or 1/4" collet depending on the
size of the bit shank.
Press and hold the spindle lock button (Figure
4, 8). If necessary, turn the motor spindle (with
collet nut) manually until it is locked in place.
2610067307_GCU18V30_202203.indd 11
page heading Assembly
.
2
-11-
Fig. 3
Fig. 4
(1)
Next, Unscrew the collet nut (12) with the pro-
vided wrench (13) by turning it in the direction
of rotation and then release the spindle lock
1
button.
Remove the old bit (if there is one) and insert
the new bit (1). The bit shank must be inserted
at least 3/4" (approximately 20mm) into the col-
let.
Next, press and hold the spindle lock button (8)
and securely tighten the collet nut (12) with the
provided wrench (13) by turning it in the direc-
tion of rotation .
2
(14)
(11)
(8)
(12)
(13)
(8)
(12)
(9)
3/30/22 8:33 AM