Preparation For Core Drilling; Fitting The Hand Wheel - Hilti DD 350-CA Manual De Instrucciones

4.2.5 Requirements to be met by users
a) Improve the blood circulation in your fingers by
relaxing your hands and exercising your fingers
during breaks between working.

5 Preparation for core drilling

WARNING
While setting up the equipment, the core drilling machine
must be disconnected from the electric supply.
DANGER
Check that the drill stand is securely fastened to the work
surface.
CAUTION
The machine and the diamond core bit are heavy.
There is a risk of pinching parts of the body.
Wear a hard hat, protective gloves and safety boots.
NOTE
When carrying the drilling machine, use the carrying
handle and the grip protrusion provided.
5.1 Setting up the drill stand 5
These steps are necessary only if the parts of the drill
stand have been folded together.
1. Loosen the bolt at the top end of the brace and at
the pivoting joint at the bottom end of the rail.
2. Bring the rail into the vertical position.
3. Tighten the bolt at the top end of the brace and at
the pivoting joint at the bottom end of the rail.
4. CAUTION The protective end cap with built-in
end stop must be fitted at the top end of the
guide rail.
If the protective end cap with built-in end stop is not
already fitted, fit it now.

5.2 Fitting the hand wheel

The hand wheel can be fitted on the left-hand side or the
right-hand side of the carriage on two different shafts.
On both sides of the carriage, the upper shaft provides
a direct drive while the lower shaft drives the carriage
through reduction gearing.
1. Fit the hand wheel onto one of the two shafts on the
left-hand or right-hand side of the carriage.
2. Secure the hand wheel with the screw.
5.3 Fastening the drill stand with an anchor 6
WARNING
Use an anchor suitable for the material on which you
are working and observe the anchor manufacturer's
instructions.
NOTE
Hilti M16 metal expansion anchors are usually suitable for
fastening diamond core drilling equipment to uncracked
concrete. Under certain conditions it may be necessary
to use an alternative fastening method. Please contact
b) Stay alert. Pay attention to what you are doing.
Approach the work with common sense. Do not
use the machine if you are not concentrating.
Hilti Technical Service if you have any questions about
secure fastening.
1. If you are working without a spacer, the anchor for
the base plate should be set, as far as possible, at
a distance of 330 mm (13 ") from the center of the
hole to be drilled.
NOTE The optimum distance is 330 mm (13 "). If a
spacer is used, this distance increases.
2. Screw the anchor spindle into the anchor.
3. Place the drill stand over the anchor spindle and then
use the hole center indicator to position it correctly.
NOTE If a spacer is fitted, the hole center indicator
cannot be used to position the drill stand.
4. Screw the clamping nut onto the anchor spindle,
leaving it loose enough to allow movement of the
base plate.
5. Level the base plate by turning the 3 leveling screws.
Use the 2 leveling indicators on the carriage as an
aid. Take care to ensure that the leveling screws
make firm contact with the underlying surface.
6. Use a 27 mm AF open-end wrench to tighten the
clamping nut on the anchor spindle.
NOTE Do not use a hammer or other heavy object
when tightening the nut as this can damage the base
plate. The brace can be released and folded out of
the way to allow better access. Before operating the
machine, however, the brace must be refitted and
securely attached to the rail.
7. Make sure that the drill stand is fastened securely.
5.4 Fastening the drill stand with the vacuum base
plate 7
DANGER
A coated, laminated, rough or uneven surface may signif-
icantly reduce the effectiveness of the vacuum system.
Check whether the surface is suitable for use of the
vacuum method to fasten the drill stand.
CAUTION
Suitable for use only with core bits ≤ 300 mm (12") in
diameter and without use of a spacer.
DANGER
Overhead drilling with the machine secured by the
vacuum base plate is not permissible.
NOTE
A vacuum valve, which can be used to release the vac-
uum, is fitted to the hand grip on the vacuum base plate.
Check the condition of the seal on the vacuum base plate
at regular intervals and replace it if it is worn or damaged.
en
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