Weka DK08 Betriebsanleitung Seite 17

The DK17 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.
5.2 Drilling - directed by a drill rig
Since the drill stand is not included in the delivery, we merely want to point out some important things you
should note when using the machine.
Please observe the special instructions for the drill rig.
Kinds for fixing the rig
Fixing the stand using dowels, by vacuum and by a brace.
The mainly applied method to fix the stand is given by using dowels. It is preferable to use metal dowels.
The diameter must be at least 16 mm.
When fixing the stand by vacuum, take care that the vacuum is sufficient high.
Make sure the seals are not worn out.
Please take care that the rig is really fixed solid and stable, if by the aid of the adjusting screws at the
base plate of the rig the vacuum seal is released.
5.3 Drilling - hand held
Open the ball valve and start the machine.
Hold the core drill as rigidly as possible.
Touch the surface you want to work on with the core bit in a slight angle (of about 30 to the axe) or use
the start drilling aid (special accessories).
After the bit has worked its way into the object for about 1/8-1/4 of the circle's circumference, turn the
core drill up into a right-angled position, using sufficient initial pressure.
Formula: drilling diameter in mm x 4 = contact power in N.
Use especially for bigger core bits a drilling-start aid which helps to keep track for the first few
millimeters. This can simply be a wooden plate with a recess in it in the shape of a triangle in which the
core bit can be guided.
DK11 with water collecting ring: Adjust the position of the gas pressure spring for the water collecting
ring in the way that it juts out at least 2 cm over the segment edge. Adapt the hose nipple to a water
suction. Then put the tool into a right-angle position to the surface that you are working on and use
sufficient initial pressure to surmount the spring power of the gas pressure spring.
Take special care that the core bit is directed in a straight way in the drilled hole so it does not block.
ATTENTION: Please do consider that the machine has a very high torque, especially in the
first gear. Therefore, drill manually only extremely concentrated, especially when working
in the first gear and with diameters of more than 60 mm. In case of a sudden blocking of
the core bit the machine, despite the safety clutch, might get out of control and hurt you
considerably. Avoid working positions at face level.
5.4 Dry drilling
In case of dry drilling fix the exhaust hose on the tail end (DK09/17), resp. into the dust exhauster
(DK116/118) and start the dust exhauster.
For applying to drill exactly a bore piercer art.-no. AS13 is disposable for the DK09/17. It is to put into the
spindle and after a depth of bore hole of maximal 10 mm it is to be removed.
The DK08/09/16/17 can alternatively be fitted with a start drilling aid, which also includes a water
collecting ring.
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