Master-force 241-0420 - Operation: Bit Removal and Drilling Guide; Removing Drill Bits Safely; Drilling Process Guidance

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to close the chuck jaws. Do not use a wrench to tighten or loosen the chuck
jaws.
4. Tighten the chuck jaws securely on the bit.
REMOVING BITS (Fig. 12)
1. Lock the trigger switch by
placing the direction of rotation
selector in the OFF (center)
position.
2. Open the chuck jaws.
NOTE: Rotate the chuck body in
the direction of the arrow marked
OPEN to close the chuck jaws.
Do not use a wrench to tighten or
loosen the chuck jaws.
3. Remove the drill bit.
WARNING! Make sure to insert the drill bit straight into the chuck jaws. Do
not insert the drill bit into the chuck jaws at an angle then tighten, as shown in
figure 12.b This could cause the drill bit to be ejected from the drill, resulting in
possibly serious personal injury or damage to the chuck.
DRILLING (Fig. 13)
1. Check the direction-of-rotation
selector for the correct setting
(forward or reverse).
2. Secure the material to be drilled
in a vise or with clamps to keep
it from turning as the drill bit
rotates.
3. Hold the drill firmly and place the
bit at the point to be drilled.
4. Depress the trigger switch to start the drill.
5. Move the drill bit into the workpiece, applying only enough pressure
to keep the bit cutting. Do not force the drill or apply side pressure to
elongate a hole. Let the tool do the work.
8. When drilling hard, smooth surfaces, use a center punch to mark the
desired location of the hole. This will prevent the drill bit from slipping off-
center as the hole is started.
WRONG!
WRONG!
Fig. 12b
Fig. 13