OPERATING
BETTCHER
AIRSHIRZ
®
INSTRUCTIONS
INDUSTRIES, INC. Rev. September 24, 2016
Page 47
9.3.2
Grinding the Blades (Continued)
After both blades have been ground, close the blades
while holding them spread apart sideways
so that the cutting edges do not touch
. Now press the blades together while opening them
slowly. This will cause the grinding burr to be rolled back onto the edge where it can be buffed
off.
FIGURE #37
Buff the blade edges at the same angle, and in the same way as they were ground, except for the
direction of the blade against the wheel. (See Figure #37 above). After buffing both blades a few
times, take the blade set and close the blades normally by hand. This will trim off any residual
burr and create a matching shape on the cutting edges.
9.3.3
Checking Blade Sharpness
A sharp blade set will be able to cut cleanly through a sheet of 8 mil (.2mm) thick latex without
fold over (sold as "Dental Dam" from dental supply outlets or available from Bettcher Industries
#108218). Check this cut when blades are closing slowly and then again, with blades closing fast.
WARNING
NEVER HOLD LATEX SHEETS IN YOUR HAND WHILE MAKING CUTS
.
ALWAYS WEAR CUT RESISTANT GLOVES WHEN HANDLING
THE AIRSHIRZ
®.
Rotation
BUFFING
WHEEL
Burr rolled
back
