illustration No. 1
SAFETY FIRST
All grinding wheels are breakable and the following
safety precautions should be observed:
1. Handle and store grinding wheels carefully.
2. Discard grinding wheels that are badly chipped.
3. Always mount a grinding wheel using blotters be-
tween the grinding wheel and the flanges.
4. Do not over-tighten the flange nut.
5. Do not run a grinding wheel faster than that specified
on the wheel blotters.
6. Do not stand in line with a grinding wheel the first
minute it is run.
7. Never jam a grinding wheel into the work piece.
8. Always wear eye protection when operating any
grinding machine.
GENERAL CHAIN TYPES
There are several general chain types that you must
recognize to sharpen properly.
The Oregon 80 chain is one that is used on saws that
have "built in" sharpeners. The cutters have a distinc-
tive shape (see illustration on page 6 ) and will not
be mistaken for either of the other types.
The most common types of chain are either the chipper
or the chisel.
CHIPPER CHAINS
The general shape of the chipper tooth is as shown in
this sketch and in Illustration 6. Note the radius on the
side of the cutter. Chippers are usually ground with a
90° hook angle as shown in Illustration 6.
CHISEL CHAINS
Chisel teeth have a general shape such as:
Page 2
RADIUS
CHIPPER CHAIN
FLAT
FLAT
CHISEL CHAINS
