Husqvarna 3120XP Operator's Manual page 35

Filing equipment and filing angles
Use a Husqvarna file gauge to sharpen the saw chain. A
Husqvarna file gauge makes sure that you get the
correct filing angles. The part numbers are given in the
table below.
H64 7/32 in / 5.5 mm
1527 - 001 - 25.06.2020
If you are not sure how to identify the type of saw chain
on your product, refer to www.husqvarna.com for more
information.
0.030 in / 0.76
505 69 81-15 35°
mm
80°
35