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14
OPERATION
Fig. 10
SCREWDRIVER
VISE
LAWN MOWER BLADE
SHARPENING TWIST DRILL BITS
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.
After sharpening, be sure to balance the blade by removing
additional material.
CAUTION:
An unbalanced lawn mower blade may cause excessive
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.
CHISEL SHARPENING
Fig. 11
Fig. 9
V-GROOVE
BIT SHARPENING