Weka DK12 Notice D'utilisation page 16

4.2 Water supply
Connect the machine with the water supply by using a GARDENA coupling to the Quick Connect Nipple.
ATTENTION: maximum water pressure 3 bar.
Use only clean water because the sealing wears more quickly with dirty water.
If water comes out of the indicator hole the rotary shaft seals are to be replaced immediately.
It is preferable to have this done in an authorized specialist´s workshop only.
4.3 Installation in the drill stand
In the drill stand, the machines are fastened by clamping the gearbox (Ø 60 mm). Put the machine into
a solidly designed drill stand that is equipped with a clamping ring that exactly fits the machine. Divided
clamping devices which do not tighten exactly in the middle of the gear's neck are unsuitable and
damage it.
Be careful that the machine's axis is absolutely parallel to the stand column. We recommend our drill rig
KS13.
4.4 Motor switch (1e) and overload protection
After having switched on the motor starts softly. If the machine is being overloaded, the motor electronic
switches over to the pulsating operation for showing the operator the overload. If the force is then not
reduced, the motor switches off after a few seconds. After switching the machine off and on again, the
motor start again softly.
The motor electronic can temporarily be used on 260 Volt (resp. 140 Volt on 110 Volt machines). Higher
voltages however can cause irreparable damages. Please note that when operating the machine via a
generator, this does not generate higher voltage peaks.
4.5 Gear changing
The DK12/13/14/16/17/18 is equipped with a 3-speed gear unit. The DK08/09 has a 2-speed gear.
Please do never change gears forcibly but only when the machine is just coming or has already come to
a stop.
4.6 Safety clutch
The integrated safety clutch protects the operator, the machine and the tools against high mechanical
overstrain.
Please notice that the safety clutch is activated after only 2-3 seconds because otherwise the
wear and the development of heat increases greatly.
5. O P E R A T I N G I N S T R U C T I O N S
5.1 Diamond core bits
The tool fixture is prepared for standard drill bits with G ½", 1 1/4" UNC or the new M33/3 thread.
Additional description 03 (e.g. DK 1203) - combined spindle with female thread G ½" + male thread 1
1/4" UNC. So it is possible to fix tools with G ½" as well as 1 1/4" UNC thread.
Additional description 08 (e.g. DK 1108) - external thread M33/3.
The DK13/17 is provided with a 1 1/4" UNC spindle. By using the additional adapter (2) it is possible to
fix tools with G ½" female thread.
Only use appropriate diamond tools of high quality.
Especially when drilling manually use core bits that cut easily and have a low specific initial pressure.
Take care that the segments jut out sufficiently against the tube.
It is useful to apply some water resistant grease to the thread of your tool so it can be taken off again
more easily.
Take care that the radial run out at the diamond segments of the core bits is not more than
1 mm, on the DK 11 not more than 0,5mm.
Changing tools on the DK 1108: The DK 1108 is provided with a special spindle arrest, which makes
the changing of the tools easier. The drill bit on this new thread is normally not so tight, that tolls are
required for loosening. Press the locking knob, for arresting the spindle and loosen the drill bit.
Never press the locking knob on a running machine!
Only use suitable wrenches for changing the core bit. Thereby hold the drilling spindle with another
wrench.
Never use a hammer or something similar to open the core bit. If necessary elongate the
wrench.
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