Hilti DD 250-CA Manual De Instrucciones Original página 23

5.3 Fitting the hand wheel on the drill stand
The hand wheel may be fitted on the left-hand or on the right-hand side of the carriage.
In the case of the DD­HD 30 drill stand, the hand wheel may be fitted on the carriage on two different
axes. The upper axis directly affects the carriage drive and the lower axis affects the carriage drive
with a gear reduction of 1:3.
1. Pull the black ring back to fit the hand wheel.
2. Fit the hand wheel onto the axle.
5.4 Securing the drill stand with an anchor
Hilti metal expansion anchors M16 (5/8") are usually suitable for fastening diamond core drilling
equipment to uncracked concrete. Under certain conditions, however, it may be necessary to use an
alternative fastening method.
Contact Hilti Technical Service if you have questions about secure fastening.
WARNING
Risk of injury due to use of wrong anchors! The machine can break loose and cause damage.
▶ Use anchors suitable for the material on which you are working and observe the anchor manufacturer's
instructions.
1. Fit the anchor that is suitable for the corresponding base material. Select the distance according to the
base plate used.
▶ Ideal distance from the hole center for DD-HD 30: 330 mm (13 in)
2. Screw the clamping spindle (accessory) into the anchor.
3. Place the drill stand over the spindle and align it. When using the DD-HD 30 drill stand, use the hole
center indicator to help you align the drill stand. When a spacer is used, the drill stand cannot be aligned
using the hole center indicator.
4. Screw the clamping nut on to the spindle but do not tighten it.
5. Level the base plate by turning the leveling screws. Use the leveling indicators for this purpose. Take
care to ensure that the leveling screws make firm contact with the underlying surface.
6. Tighten the leveling screws evenly until the drill stand is securely fastened.
7. Check that the drill stand is secure.
5.5 Securing the drill stand by vacuum
DANGER
Risk of injury if the diamond core drilling machine falls !
▶ 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 if pressure is not checked !
▶ Before and during drilling, check that the pressure gage pointer remains in the green zone.
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).
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.
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