Sharpening Twist Drill Bits

OPERATION

See Figure 9.

Drill bits are best sharpened on a sharpening jig (available at most hardware stores). Begin on one side of the point at the existing angle, then twist the bit while maintaining contact with the grinding surface. Sharpen only the tip.

This technique requires considerable practice, so take your time and make a few “dry runs” first with the grinder off. Be sure to maintain the original cutting edge angle as this is important to the efficiency of your bits. One work rest has a V-groove angled to fit most drill bits.

SHARPENING LAWN MOWER BLADES

See Figure 10.

Lawn mower blades are usually sharpened on only one
edge and dressed up slightly on the other. Perform this
sharpening process on both cutting ends of the blade.	V-GROOVE
After sharpening, be sure to balance the blade by removing	V-GROOVE
After sharpening, be sure to balance the blade by removing
additional material.	BIT SHARPENING	Fig. 9
	BIT SHARPENING	Fig. 9
CAUTION:	SCREWDRIVER
An unbalanced lawn mower blade may cause excessive	LAWN MOWER BLADE
vibration which will damage the lawn mower.	LAWN MOWER BLADE
vibration which will damage the lawn mower.

SHARPENING CHISELS AND SCREWDRIVER

BLADES

See Figure 11.

When sharpening chisels and screwdrivers, work rest should support the chisel at the correct angle against the wheel.

VISE

Fig. 10

CHISEL SHARPENING

Fig. 11

OPERATION