Echo CS-510 Instruction Manual page 23

Push file as shown
Hold the file tipped 10° upward
1/5
One fifth of file diameter remains
above cutter edge
Depth gauge tool
25
Keep this
angle
10°
Remove until
flat with tool
Round off
the edge
21
SETTING SAW CHAIN
For setting saw chain, round file (4 mm dia. 5/32
inch) and flat file are used.
To keep correct position and correct angle,
use the file holder (Sure Sharp).
- Round file (P-No. 897510-03931) and flat file
(P-No. 897511-00230) are optional.
- Inquire about the file holder, if desired.
Place the depth gauge tool firmly on guide
bar so that depth gauge protrudes.
Then file top of depth gauge with flat the file until
flat with top of the depth gauge tool.
- Be sure to round off the front edge of the
depth gauge.