Overload Protection - Makita DBM131 Betriebsanleitung

Main Instructions
The DBM131 is in connection with diamond core drill bits meant for drill in bricks, brickwork and lime-sand-
stone for dry cut and in concrete and stone for wet cut.
The plastic cap stays also during the dry cut on the spindle and is only to remove for replace the shaft
seals.
For drill about more than 40 mm and operating in the 1
necessary. The user is responsible for damages caused by inappropriate use.
Hand drilling in the first speed forbidden! Counter torque can lead to risk in case of careless use.
Auxiliary Handle
In hand held drilling operations, only use the machine with the auxiliary handle fixed. This handle must be
tighten on the collar, by turning the lever.
Putting into operation
First, check the correspondence between voltage and frequency against the data mentioned on the
identification plate. ± 5 % voltage difference is allowed.
The machine is supplied with a standard integrated PRCD-protection switch for use at a grounded socket.
Check before every use the proper function of the PRCD-protection switch (see special instruction!)
Attention! Don't use PRCD switch for switching on / off the machine!
Use only 3-wire extension cable with protecting conductor and sufficient cross-section (min. 2,5 mm²). A
cross-section which is to small could lead to excessive power loss and to overheating of motor and cable.
The drilling progress must correspond with the bit diameter and the drive power of the machine so that the
rated power will not be exceed.
Gear Shifting
According to the drill bit diameter you have to choose between the both possible speeds.
For drilling up to 70 mm we recommend the 2
motor) and for drilling over 70 mm you have to use the 1
(pointed side of the gear switch shows towards spindle).
If it is not possible in standstill to turn the gear switch in end position just turn the spindle a little bit.
Attention! Gear shifting only when the machine is stopped. Turn in clockwise direction!
On-Off Setting
The diamond drill machine is equipped with an electronic controller with locking device.
The more the switch is pressed, the higher is the speed. This allows very precise drilling when starting a
hole.
In normal working conditions, always work at maximum speed.
Attention! Do not lock the switch in case of hand held drilling.
Short-Time Operation – free-hand drilling
switching-on:
switching off:
Permanent Operation – drilling with drill stand
switching-on:
switching-off:

Overload Protection

In order to protect the operator, the motor and the drill bit, the machine is equipped with a mechanical,
electronic and thermal overload protection.
mechanical:
electronic:
nd
speed •• (pointed side of the gear switch shows towards
press the on/off switch
release the on/off switch
press the on/off switch and keeping it pressed, engage the lock button
press the on/off switch again and let it go off
If the drill bit is suddenly blocked in the hole, a clutch will slip
disengaging the bit from the motor.
Pay attention to the reaction torque.
For the warning of the user at overload of the machine in case of too
large crowd force there is installed a LED into the hand grip.
st
speed the use of the drill stand is absolute
st
speed •