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6. Selecting the driver bit
Screw heads or bits will be damaged should an
inappropriate bit for the screw diameter be employed
to drive in the screws.
7. Selecting the function mode
You can switch functions to the 3 modes of "strike
only, "rotation + strike", and "rotation only" by
turning the change lever while pressing the push
button. Set the
mark position of the change lever
to that of the mode to be used.
CAUTION:
Before operating the change lever, check and make
sure that the motor has stopped.
A failure can occur if it is operated while the motor is
running.
If the change lever does not move up to the mark
position of each mode, carry out switching while
turning the grip end to left and right. Also, it can
become difficult to change the mode at low
temperature, and therefore perform warming-up.
To operate the change lever, press the push button,
and release the lock of the change lever. Also, check
and make sure after operation that the push button
has returned and that the change lever has been
locked.
Switch the change lever without mistake. If it is used
at a position halfway, there is a fear that the service
life of the switching mechanism may be shortened.
Note that it is impossible to switch from "rotation
only" to "strike only" or from "strike only" to "rotation
only". Switch over via "rotation + strike". (DH30PC)
HOW TO USE
CAUTION:
To prevent accidents, make sure to turn the switch off
and disconnect the plug from the receptacle when the
drill pits and other various parts are installed or removed.
The power switch should also be turned off during a
work break and after work.
1. Switch operation
The rotation speed of the drill bit can be controlled
steplessly by varying the amount that the trigger
switch is pulled. Speed is low when the trigger
switch is pulled slightly and increases as the switch
is pulled more.
2. Rotation + striking
This hammer drill can be set to rotation and striking
mode by pressing the push button and turning the
change lever to the
(1) Mount the drill bit.
(2) Pull the trigger switch after applying the drill bit tip to
the drilling position. (Fig. 5)
(3) Pushing the hammer drill forcibly is not necessary at
all. Pushing slightly so that drill dust comes out
gradually is sufficient.
CAUTION:
When the drill bit touches construction iron bar, the
bit will stop immediately and the rotary hammer will
react to revolve. Therefore grip the side handle and
handle tightly as shown in Fig. 5.
3. Rotation only
This hammer drill can be set to rotation only mode
by pussing the push button and turning the change
lever to the
mark. (Fig. 6)
mark. (Fig. 4)
To drill wood or metal material using the drill chuck
and chuck adapter (optional accessories), proceed as
follows.
Installing drill chuck and chuck adapter: (Fig. 7)
(1) Mount the drill chuck to the chuck adapter.
(2) The part of the SDS-plus shank is the same as the
drill bit. Therefore, refer to the item of "Mounting the
drill bit" for attaching it.
CAUTIONS:
Application of force more than necessary will not
only expedite the work, but will deteriorate the tip
edge of the drill bit and reduce the service life of the
rotary hammer in addition.
Drill bits may snap off while disengaging the rotary
hammer from the jammed hole. For disengaging, it
is important to use a pushing motion or turn the drill
bit counterclockwise.
Do not attempt to drill anchor holes or holes in
concrete with the machine set in the rotation only
function.
Do not attempt to use the rotary hammer in the
rotation and striking function with the drill chuck and
chuck adapter attached. This would seriously shorten
the service life of every component of the machine.
4. When driving machine screws (Fig. 8)
First, insert the bit into the socket in the end of chuck
adapter (D).
Next, mount chuck adapter (D) on the main unit
using procedures described in 4 (1), (2), (3), put the
tip of the bit in the slots in the head of the screw,
grasp the main unit and tighten the screw.
CAUTIONS:
Exercise care not to excessively prolong driving time,
otherwise, the screws may be damaged by excessive
force.
Apply the rotary hammer perpendicularly to the screw
head when driving the screw; otherwise, the screw
head or bit will be damaged, or driving force will not
be fully transferred to the screw.
Do not attempt to use the rotary hammer in the
rotation and striking function with the chuck adapter
and bit attached.
5. When driving wood screws (Fig. 8)
(1) Selecting a suitable driver bit
Employ cross-recessed screws, if possible, since the
driver bit easily slips off the heads of slotted-head
screws.
(2) Driving in wood screws
Prior to driving in wood screws, make pilot holes
suitable for them in the wooden board. Apply the bit
to the screw head grooves and gently drive the screws
into the holes.
After rotating the rotary hammer at low speed for a
while until the wood screw is partly driven into the
wood, squeeze the trigger more strongly to obtain
the optimum driving force.
CAUTION:
Exercise care in preparing a pilot hole suitable for the
wood screw taking the hardness of the wood into
consideration. Should the hole be excessively small
or shallow, requiring much power to drive the screw
into it, the thread of the wood screw may sometimes
be damaged.
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