Makita DCS3410TH Instruction Manual page 20

All cutters must be sharpened to the same angle, 30°. Different
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 round fi le. If the proper fi le is used in the right manner, the
correct front rake will be obtained automatically.
Files and how to work with them
Use a special round fi le for chains (dia. 4 mm) for sharpening
the chain. Normal round fi les are not appropriate for this work.
See „Accessories" for the order number.
The fi le should cut only when pushed forwards (arrow). Lift the
fi le when leading it backwards.
First sharpen the shortest cutter. The length of this cutter is then
the standerd for all other cutters of the chain.
New saw teeth must be fi led to the exact same shape as the
used teeth, including on their running surfaces.
File depending on chain type (90° or 10° to the guide bar).
The fi le holder makes fi le guidance easier. It is marked for the
correct 30° sharpening angle (keep the marks parallel with the
chain when fi ling, see illustration) and limits the cut depth to
the correct 4/5 of the fi le diameter. See „Accessories" for the
order number.
After having sharpened the chain, the height of the depth limiter
must be checked by means of a chain gauge. See „Accessories"
for the order number.
Correct even the smallest excess height with a special fl at
fi le (12). See „Accessories" for the order number.
Round off the front of the depth limiter (13).
20
Chain typ
092
30°
12
C
Chain typ
466
D
4/5
E
13
F