Intended Use; Operation - Sharpening A Twist Drill - Westfalia 83 58 98 Instruction Manual

Intended Use

The twist drill sharpener is intended to sharpen steel drill bits according to DIN
338, DIN 340, DIN 345, DIN 1869 and DIN 1897 (MODEL Type N). Carbide
twist drills must not be sharpened with this unit
Operation – Sharpening a Twist Drill
1. Fully lower the grinding stone. Turn the rotary switch (4) counter clockwise
up to the end in direction DOWN.
2. Insert the twist drill into the suitable drill guide (1). The exact sizes (Ø) of
each drill are shown on the cover (6) in centimetres and inches. Turn the
twist drill clockwise until you notice that the drill is engaged.
3. For switching on the unit, press the ON/OFF switch (5) in direction I. Turn
the rotary switch (4) in direction UP, until you hear a grinding noise.
Hints: With the rotary switch you can adjust the position of the grinding
stone. The further you turn the rotary switch in direction UP, the greater
the pressure will be. Do not turn the rotary switch too far up, as the grind-
ing stone will strike the housing.
4. Slightly pull the twist drill up and turn it through 180° (horizontally) and
insert it again unit it touches the grinding stone. Repeat the process until
both cutting edges of the twist drill are sharp.
5. Switch off the unit by pressing the ON/OFF switch (5) in direction 0.
Hints:
Badly damaged twist drills should first be
coarsely sharpened on a sharpening block.
Both cutting edges (b) must have the same
angle to the drill axis (a) and have the same
length so that the drill runs concentrically.
Control the grinding operation so that the
angle between the main and the transverse
cutting edges for a standard twist drill is
118°.
After operating the motor for maximum 3
minutes, allow the unit to cool down for 7
minutes.
Operation
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