SKU 91674 For technical questions, please call 1-800-444-3353. Page 11
Sharpening Drill Bits
A drill bit is properly sharpened when it has the following characteristics:
Note: See FIGURE 3.
A.
A sharp point in the center of the bit.
B
Two, equal sharp cutting edges.
C.
Two trailing edges, slightly more concave than the cutting edges.
Note: To determine exact angles of the edges, fit the bit into the Angle Divider
(32) to check specific conformities.
Refer to FIGURES 1 and 2 on page 10, and FIGURE 3 above.
Warning!! The bit will become extremely hot during the sharpening process.
Make sure you wear protective gloves, and have a suitable surface to set hot bits
on when you are finished with them.
1.
Place the Sharpener on a flat, sturdy surface. Plug in the unit.
2.
Collect a clean bit to be sharpened and match its size to one of the sharpening
holes on the top of the Sharpener.
3.
Put the bit into the appropriate hole and twist it until it locks into place. The top of the
wheel is concave so that the bit can be slightly angled toward the number on the
hole on the top of the Sharpener. See FIGURE 2.
Note: To sharpen shorter bits, turn the Adjusting Wheel (25) clockwise, to raise the
Grinding Wheel (20). Turning counterclockwise lowers the Grinding Wheel (20).
Warning!! The exposed Grinding Wheel (20) turns when sharpening bits. Make
sure your hands and fingers are clear of it.
4.
Turn the unit on while exerting slight downward hand pressure onto the bit. Turn the
unit off after five to ten seconds.
Warning! Do not let the bit overheat. If the tip of the bit begins to turn blue, then it is
overheating. If that happens, reduce the amount of pressure and sharpening time. If
necessary, cool the bit in water between sharpening. Make sure it is thoroughly dry
before putting it back in the shapener.
5.
Examine the bit with the following things in mind.
a. If one edge is longer that the other and the point is not centered, sharpen the
shorter side for a little more time. To prevent this from happening, sharpen both
sides the same amount of time using equal pressure.
FIGURE 3
Center Point
Cutting Edge
Trailing Edge
Rotation direction of bit
