Bosch HD18-2 Operating/Safety Instructions Manual page 8

2610048705.qxp_HD18-2 10/5/17 10:24 AM Page 8
before making any assembly, adjustments
or changing accessories. Such preventive
safety measures reduce the risk of starting the
tool accidentally.
INSERTING BIT
For small bits, open jaws enough to insert the
bit up to the flutes. For large bits, insert the bit
as far as it will go. Center the bit as you close
the jaws by hand. This positions the bit
properly, giving maximum contact between the
chuck jaws and the bit shank.
To tighten chuck, insert key into each of the
three key holes in succession and tighten
AUXILIARY HANDLE
The tool must be supported with the auxiliary
handle, which can be swiveled and locked into
12 positions 360˚ around the collar mount.
To reposition and/or swivel the handle, rotate
wing knob counterclockwise and push handle
forward until it disengages from locking teeth in
the collar mount, move handle to the desired
position and push handle inward until it
engages into desired position, then securely
tighten wing knob (Fig. 3).
DEPTH GAUGE
Your drilling depth can be pre-set and/or
repeated by using the depth gauge.
Setting depth: After the auxiliary handle is
installed, make sure the accessory has been
fully inserted into the chuck before setting the
depth gauge (Fig. 3).
To adjust depth, push down on the depth
gauge release lever, slide the depth gauge to
VARIABLE SPEED CONTROLLED
TRIGGER SWITCH
Your tool is equipped with a variable speed trigger
switch. The tool can be turned "ON" or "OFF" by
squeezing or releasing the trigger. The speed can
Assembly
Disconnect the plug
from the power source
Operating Instructions
clockwise firmly. The chuck can be released by
using one hole only (Fig. 2).
Counter
C
FIG. 2
Clockwise
desired depth and release pressure on lever to
lock the depth gauge in place (Fig. 3).
COLLAR MOUNT
LOCKING
TEETH
X
FIG. 3
AUXILIARY
HANDLE
be adjusted from the minimum to maximum
nameplate RPM by the pressure you apply to the
trigger. Apply more pressure to increase the
speed and release pressure to decrease speed
(Fig. 1).
-8-
Clockwise
DEPTH
GAUGE
RELEASE
LEVER
WING
KNOB