Maintenance Sharpening The Saw Chain - Makita UC3030A Instruction Manual

MAINTENANCE
Sharpening the saw chain
When working on the saw chain you must always pull out
the power supply plug and wear protective gloves.
The chain needs sharpening when:
- the sawdust from sawing humid wood looks like wood
flour.
- the saw chain penetrates the wood only under great pres-
sure.
- the cutting edge is visibly damaged.
- the sawing device is pulled to the left or the right during the
sawing operation. This is caused by uneven sharpening of
the chain or by damage to one side of it.
Important: Sharpen frequently, but without removing
too much metal!
Generally, 2 -­3 s trokes o f t he fi le w ill b e e nough.
Have t he c hain r esharpened i n a s ervice c enter w hen y ou
have sharpened it yourself several times.
Proper sharpening:
CAUTION:
Use only chains and guide bars designed for this saw!
- All cutters must be of the same length (dimension a). Cutters
with d ifferent l engths r esult i n r ough r unning o f t he c hain a nd
can cause cracks in the chain.
-­ Minimum c utter l ength i s 3 m m ( 0.11"). D o n ot r esharpen t he
chain when the minimum cutter length has been reached;
at this point, the chain must be replaced.
-­ The d epth o f t he c ut i s d etermined b y t he d ifference i n h eight
between the depth limiter (round nose) and the cutting
edge.
- The best results are obtained with a depth-limiter depth of
0.64 m m ( .025").
CAUTION:
Excessive depth increases the
risk of kickback!
- All cutters must be sharpened to the same angle, 30°. Dif-
ferent angles result in a roughly, irregularly running chain,
increase wear and tear and cause chain beakage.
- The 85° front rake of the cutter results from the cut depth of
the r ound fi le. I f t he p roper fi le i s u sed i n t he r ight m anner,
the correct front rake will be obtained automatically.
20
0.64 mm 0.64 mm
(.025") (.025")
min.
3 mm (0.11")
A