Ryobi BGH616 English Manual - Page 14
Sharpening Twist Drill Bits, Sharpening Lawn Mower Blades, Caution, Sharpening Chisels
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Operation 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. V-GROOVE BIT SHARPENING Fig. 9 SCREWDRIVER LAWN MOWER BLADE VISE Fig. 10 CHISEL SHARPENING Fig. 11 14