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Saw chain maintenance
Properly filed cutters are shown below.
A: Top plate angle K2L; 35°, 21BPX; 30°
B: Side plate angle K2L; 80°-90°, 21BPX; 85°
C: Top plate cutting angle 60°
D: Depth gauge K2L; 0.71 mm, 21BPX; 0.64 mm
E: Parallel
1. Left hand cutter
2. Tie strap
3. Right hand cutter
4. Depth gauge
5. Drive link
6. Rivet
Never operate a chain saw with a dull or damaged chain.
If the chain requires excessive pressure to cut or produces dust instead of wood chips then
inspect the cutters for damage.
When sharpening the chain the objective will be to maintain the same angles and profiles
throughout its life as when it was new.
Inspect the chain for damage or wear every time you refuel your chain saw.
WARNING
Switch off the engine before sharpening the chain.
Always wear gloves when working on chain.
CAUTION
The following faults will increase the risk of kickback considerably.
1) Top plate angle too large
2) Side plate angle too small
3) File diameter too small
4) Depth gauge too large
NOTE
These angles are referred to as Oregon 21BPX and Carlton K2L saw chains.
For other branded saw chain, follow it's chain manufacturer's instruction.
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