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OPERATING
BETTCHER
AIRSHIRZ
®
INSTRUCTIONS
INDUSTRIES, INC. Rev. September 24, 2016
Page 45
9.3.2
Grinding the Blades (Continued)
Blades which have a small gap at the tip often may be restored by grinding back the length of both
blades up to the point of overlap (see Figure #34B). This procedure may be repeated until the
blade length no longer suits the application.
CAUTION
: Do not let the blade tips overheat during
grinding, or the strength of the metal will be destroyed. Dip the tips in a cup of water to cool them
between each grind.
If you are using a special blade set, follow the recommendations that came with them.
FIGURE #34A
FIGURE #34B
Use a bench grinder type sharpener that has both a grinding wheel and a buffing wheel.
After sharpening, the blade nut will usually need to be adjusted so that the blades engage
adequately over the full cutting length (see Section 9.3.4).
WARNING
WEAR SAFETY GLASSES AND CUT RESISTANT GLOVES
WHILE SHARPENING THE BLADES
.
Grind the edge of both blades at 25°.
NOTE:
Special blades sets may specify a different angle. It
is very important to always regrind the blades to their same angle, otherwise, blade life will be
reduced significantly.
Maximum Grind Depth
Grind Back Both Blades to
the Point of Overlap