Chicago Electric 61778 Owner's Manual & Safety Instructions page 7

properly Sharpened Bits
Center point
Trailing Edge
Figure C: parts of the Bit
Item 61778
Cutting Edge
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Bit is properly sharpened when it has
the following characteristics.
1. A sharp point in the center of the bit.
2. Two sharp and equal cutting edges.
3. Two trailing edges that are slightly
lower than the cutting edges.
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