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Remove material only from the outside surface and work from the heavy end of the blade
toward the tip.
KNIVES
Remove metal from both faces of most knives, working from the heavy end of the blade
toward the tip.
SCREWDRIVERS
The end of a properly sharpened screwdriver will be a perfect rectangle, absolutely flat
and perpendicular to the center line of the shank. The two sides and two faces will taper
outward from the edge of the shoulder or shank. They should be flat with intersecting
faces perpendicular. Hold each face of the screwdriver against the wheel to true it up, and
then ease the end straight into the stone to grind it true.
TWIST DRILL BITS
Drill bits are best sharpened on a sharpening jig, available at most hardware stores, but
can be “dressed up” on your bench grinder. Begin on one side of the point at the existing
angle, and then twist the bit while maintaining a constant angle with 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 tool rest has a V-groove
that is correctly angled for most drill bits.
LAWN MOWER BLADES
Lawn mower blades are usually sharpened on only one side and dressed up slightly on
