PROFECO 77415 Instruction Manual page 24

3. Drilling in metal
Use a steel drill for drilling into metal. Always ensure sufficient cooling with
suitable non-flammable coolants. Protect or secure the workpiece with a
suitable holder. The workpiece must lie flat on the workbench. Mark the
positions of the holes to be drilled with a centre punch. Do not exert excessive
pressure on the workpiece with the machine. Let the drill run at its normal
operating speed.
Important! When starting to drill, select a lower speed to prevent the drill from
slipping away from the desired position in the hole. If the drill hole is deep, the
drill may become stuck in the hole. In this case, a high torque may damage the
drill bit. If the drill becomes stuck, hold the machine firmly and release the
on/off trigger immediately. Switch to counter clockwise rotation and use a low
speed to make it easier to remove the jammed drill bit.
4. Drilling in plastic
When drilling into plastic, use a steel drill bit and follow the same instructions
as for drilling into wood.
5. Using the drill as a screwdriver
Before using the machine, check that the screwdriver bit is correctly inserted.
Do not over-tighten screws, otherwise the screw head may be damaged or the
thread stripped. Use screwdriver bits that are not too worn.
6. Insertion of the screw
Set the direction of rotation of the drill in a clockwise direction. Insert the
screwdriver bit into the slot in the head of the screw. Hold the screwdriver bit
perpendicular to the head of the screw, otherwise the screw or the screw head
may be damaged. Press the screwdriver bit against the screw with constant
pressure while driving the screw.
7. Unscrewing the screw
Set the direction of rotation of the drill to counter clockwise. Insert the
screwdriver bit into the slot in the head of the screw. Hold the screwdriver bit
perpendicular to the screw head, otherwise the screw or the screw head may
be damaged. Press the screwdriver bit against the screw with constant
pressure while you are removing the screw.
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