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6.2
Drilling using the drill stand
WARNING
Water running out presents a risk of electric shock! The spray guard cannot be used when the machine
is mounted on the drill stand. The machine is therefore not protected against entry of water when mounted
on the drill stand.
▶ Never drill in an upwards direction with the machine mounted on the drill stand!
WARNING
Risk of accident! When drilling penetrations through walls or floors/ceilings, the core or fragments of
material may drop out and fall down on the other side.
▶ Take the necessary safety precautions on the other side of the wall or below the floor/ceiling before
drilling penetrations.
WARNING
Risk of injury Hazard presented by a falling diamond core drilling machine.
▶ When drilling horizontally, the drill stand must be secured additionally by a chain.
1. If you are using a wet/dry industrial vacuum cleaner, connect the suction system ( → page 37) and follow
steps 1 to 3 in the section on hand-guided drilling ( → page 38).
2. Plug the supply cord into the power outlet and switch on the ground fault circuit interrupter (PRCD) (see
section on connecting electric power and water → page 37).
3. Release the carriage locking mechanism.
4. Use the hand wheel to move the carriage down until the water collector is in contact with the working
surface.
5. Press the machine's control switch and hold it in this position. Set the water regulation lever to the
desired water flow rate and then release the control switch.
The water supply (water on/off) is controlled automatically by the machine's control switch. The
water flow rate can be preset by turning the water regulating lever before starting drilling or
regulated while drilling is in progress (minimum water flow rate when the regulating lever is in the
"closed" position is approx. 0.3 l/min).
6. Switch the machine on in sustained operating mode by pressing the control switch fully and then pressing
the switch lockbutton.
7. Turn the hand wheel until the diamond core bit is in contact with the working surface.
8. When beginning drilling, apply only light pressure until the core bit has centered itself and then increase
the pressure.
9. Increase the pressure against the working surface as soon as you feel that the core bit has centered itself
and is rotating smoothly.
10. Regulate the contact pressure while observing the drilling performance indicator.
Adjust the pressure applied so that the machine continues to run at full speed. Optimum drilling
performance will then be achieved (the drilling performance indicator lights green). Higher contact
pressure will not increase the drilling performance (the drilling performance indicator lights red).
Keep an eye on the water flow rate while drilling is in progress. Check the water flow rate indicator.
6.3
Drilling with a 600 mm core bit
1. Start the hole by predrilling with a 300 mm core bit.
WARNING
Risk of injury. Drilling with the 600 mm core bit without predrilling may cause loss of control of the machine
resulting in damage and injury.
▶ Always predrill (use a shorter core bit to start the hole). Before continuing drilling, ensure that the 600
mm core bit is inserted all the way to the base of the predrilled starting hole.
2. After changing the core bit, keep the machine switched off and guide the 600 mm core bit into the
predrilled hole, all the way to the base of the hole.
3. Continue drilling.
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