Multi-Function Sharpener – MFS2
E&OE
© 2017 Unimac
7
Sharpening Drills
The tool is suitable for sharpening high speed steel (HSS) and hardened steel drill bits to a nominal
118° included angle that is ideal for "normal" drilling into wood, plastic, aluminium, steel etc. It is
NOT designed for sharpening carbide-tipped masonry bit, wood bores, counter-boring and counter-sinking
tools etc. • The tool is suitable for drill diameters of 3mm (7/64") to 10mm (3/8"). • If the drill is broken,
roughly shape the drill to a point using a bench grinder before using the sharpener. • For drill bits that are
damaged or severely blunted, it may take several uses of the sharpener to rectify.
1. Insert the drill sharpening module into the tool.
2. Lift the drill bit holder (
A
) from the sharpening module and loosen the clamping screw (
B
) so the drill bit
can be inserted.
3. Insert the drill bit (
C
) into the holder and tighten the clamping screw just enough to hold the bit but still
allow it to be easily moved.
4. Insert the bit holder into the drill setter (
D
). Ensure that the slots on the sides of the bit holder engage
with the "rails" in the drill setter.
5. Hold the "V" block (
E
) against the bit holder, then push forward lightly on the drill bit and slowly rotate it.
When the drill bit flutes are on the left and right sides and the bit is as far into the "V" block as it will go,
the angle of drill rotation is correct.
6. Release the "V" block, then move the drill forward (do not rotate it) until the end of the drill bit reaches
the top of the "ramp" of the metal drill stop (
F
). This sets the correct distance for the drill bit to protrude
from the holder.
7. Tighten the drill holder clamping screw. Be sure not to allow the drill
to move or rotate, then remove the drill holder from the drill setter.
8. Switch the tool ON, then gently insert the bit holder into the drill
guide (
G
). Ensure that the slots on the sides of the bit holder
engage with the "rails" in the drill guide. The protruding end of the
drill should be resting on the metal bar at the end of the drill guide
and just touch the grinding wheel.
9. Smoothly move the grinding table (
H
) back and forth until there is no
longer any grinding noise or sparks.
10.
Carefully lift the bit holder out of the drill
guide, then turn it over, insert it into the drill guide
and sharpen the other side of the drill bit.
When finished, the point where the drill flutes
meet should be centred and the cutting edges should be straight (no chips etc) and
equal in length.
H
A
B
C
D
E
F
G
