Hilti DD 350 Mode D'emploi Original page 19

1. Set the anchor for the base plate 330 mm (13 inch) from the hole center.
Note
If you work with a spacer, increase the distance accordingly.
2. Screw the clamping spindle into the anchor.
3. Slip the drill stand over the spindle and align it.
4. Screw the clamping nut on to the spindle but do not tighten it.
5. Use the leveling screws to level the base plate.
6. Use a suitable open-end wrench to tighten the clamping nut on the clamping spindle.
7. Check that the drill stand is secure.
5.1.4 Securing the drill stand by vacuum
DANGER
Risk of injury Hazard presented by a falling diamond core drilling machine.
▶ Fastening the drill stand to the ceiling only by means of the vacuum securing method is not
permissible. A heavy structural support or a threaded spindle, for example, can serve as an
additional means of fastening.
WARNING
Risk of injury Pressure check
▶ Before beginning drilling and during operation, it must be ensured that the pressure gage indicator
remains within the green area.
Note
In order to use the drill stand with anchor base plate, establish a secure, flat-on-flat connection between
vacuum base plate and anchor base plate. Screw the anchor base plate securely to the vacuum base
plate. Make sure that the core bit selected for use will not damage the vacuum base plate.
If you are going to drill horizontally, use additional means of securing the diamond core drilling machine
(e. g. chain secured to anchor).
Read the operating instructions for the vacuum pump.
Note
Before positioning the drill stand, check that you have sufficient space for assembly and operation.
1. Turn all the leveling screws until they project approx. 5 mm underneath the vacuum base plate.
2. Connect the vacuum connector on the vacuum base plate to the vacuum pump.
3. Set the drill stand on the vacuum base plate.
4. Use the screw supplied, complete with its washer, to secure the drill stand to the vacuum base plate.
5. Locate the center point of the hole to be drilled.
6. Draw a line approximately 800 mm in the direction in which the core drilling system is to stand.
7. At a distance of 165 mm (6 1/2 inches) from the center point of the hole to be drilled, make a mark on the
800 mm long line.
8. Switch on the vacuum pump and press and hold down the vacuum release valve.
9. Position the drill stand on the work surface.
10. Release the vacuum release valve.
11. Use the leveling screws to level the vacuum base plate.
◁ The needle of the pressure gauge is in the green area.
Note
Do not level the anchor base plate on the vacuum plate.
12. Secure the drill stand for drilling horizontally.
13. Check that the drill stand is secure.
Printed: 18.10.2017 | Doc-Nr: PUB / 5236054 / 000 / 02
7
English 9