Weka DK08 Instrucciones De Servicio página 17

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 10 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 (DK09/13/17), 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 DK09/13/17. It is to put into
the spindle and after a depth of bore hole of maximal 10 mm it is to be removed.
The DK08/09/12/13/16/17 can alternatively be fitted with a start drilling aid, which also includes a water
collecting ring.
Use by dry drilling absolutely a powerful dust exhauster which´s filter doesn´t obstruct.
Drilling dry is only possible if the masonry is absolutely dry - risk of obstruction.
Before working dry with the DK09/13/17 in order to avoid obstruction, take care that the inner side of the
spindle is absolutely dry.
For the rest proceed as explained in 5.3.
5.5 General directions for drilling
Adjust the quantity of water by using the ball valve to such an extent that the loose material gets
completely washed out of the drilled hole.
You do not wash out enough material if mud occurs around the drilled hole.
Use sufficient contact pressure. If it is too low the diamonds tend to polish. This means that the feed
speed becomes less until finally no material is cleared away any more.
In this case the segments are to "sharpen" again by means of a SiC-grindstone.
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