Fixing the drill stand in place
Note: Fix the drill stand in place so that it is free of play. This prevents the core bit jamming and segments from being torn out.
Depending on the type and condition of the surface, fasten the drill stand at the planned bore hole using anchors or vacuum.
Mark the centre of the hole you want to drill on the surface. Mark the outer dimensions of the core bit you want to use, using the centre of the hole as the centre of the bit.
Fix the drill stand (with power tool inserted) in place using an anchor or vacuum so that the core bit lines up with the marked dimensions when attached.
Drill a separate attachment hole for fixing the drill stand in place with an anchor (accessories) in masonry or concrete.
Distance between anchor hole and centre of planned hole | |
|---|---|
optimum | 210 mm |
Possible | 200–300 mm |
The following dimensions apply for the anchor hole:
Diameter | Depth | |
|---|---|---|
Masonry | 20 mm | 85 mm |
Concrete | 16 mm | 50 mm |
Insert a concrete anchor with expansion wedge or a masonry anchor (30). Screw the quick-clamping spindle (31) into the anchor.
Attach the drill stand and a washer and screw these on using the wing nut (32). Tighten the wing nut according to the levelling using an open-ended spanner (width across flats 27 mm).
To fasten the drill stand by vacuum, you need a commercially available vacuum pump and a Bosch vacuum set (accessory).
The vacuum pump must meet the following minimum requirements:
Volume flow: | 6 m3/h |
Vacuum at least: | 80% (-800 mbar) |
The surface must be smooth and flat in order to fasten with vacuum. Use on plaster or brickwork is not permitted.
Once the vacuum connection has been established, gently attach the levelling screws (22) to the base material so that the drill stand is in a rigid position and the sealing ring relaxes slightly. Otherwise the drill stand will sit very softly on the sealing ring.
In order to connect the vacuum pump and Bosch vacuum set, please read and follow the respective operating instructions.
- The safety and operating instructions for the vacuum pump and vacuum set must be strictly observed.