Makita UC120D Instruction Manual page 14

30˚
90˚
14
1. Filing cutters
001746
Use a round file 4 mm (5/32") in outer diameter to file the
cutters. Apply it to the cutter so that it will be angled 30°
to the guide bar and protrude 1/5 of the outer diameter
from the tip of the cutter. Hold the file level and push it
away from you while filing. Be careful not to touch the
cutters with the file when pulling it back toward you.
001747
2. Filing depth gauges
001748
Use a flat file to file the depth gauge. Hold the file level
when filing. Round off the front corner of the depth
gauge to maintain its original shape.
001749
After filing the saw chain, immerse it in oil and wash off filing
chips and sawdust from the saw chain.