Stihl HT 56 C Instruction Manual page 24

English
Mark (a)
7
1 or 1/4
6, P or PM
2 or 325
3 or 3/8
Select file diameter according to chain pitch –
see table "Sharpening Tools".
You must observe certain angles when resharp‐
ening the chain cutter.
24.3 Filing and side plate angles
A
B
A Filing angle
STIHL saw chains are sharpened to a filing angle
of 30°. Exceptions are ripping chains with a filing
angle of 10°. Ripping chains have an X in their
designations.
B Side plate angle
The correct side plate angle is obtained automat‐
ically if you use the prescribed file holder and file
diameter.
Cutter shapes
Micro = semi chisel cutter, e.g.
63 PM3, 26 RM3, 71 PM3
Super = chisel cutter, e.g. 63 PS3,
26 RS, 36 RS3
Ripping chain, e.g. 63 PMX,
36 RMX
The angles must be the same on all cutters. If
the angles are uneven: Chain will run roughly,
not in a straight line, wear quickly and finally
break.
24
Chain pitch
inch mm
1/4 P 6,35
1/4 6,35
3/8 P 9,32
0.325 8,25
3/8 9,32
Angle (°)
A B
30 75
30 60
10 75
24 Maintaining and Sharpening the Saw Chain
24.4 File holder
► Use a file holder
A file holder must be used for manual resharpen‐
ing (see table "Sharpening Tools"). The correct
filing angles are marked on the file holder.
Use only special saw chain sharpening files.
Other files have the wrong shape and cut.
24.5 For checking angles
Use a STlHL filing gauge (special accessory, see
table "Sharpening Tools"). This is a universal tool
for checking the filing and side plate angles,
depth gauge setting, cutter length and groove
depth. It also cleans the guide bar groove and oil
inlet holes.
24.6 File correctly
► Select sharpening tools according to chain
pitch.
► If you use an FG 2, HOS or USG sharpener:
Remove the chain from the bar and sharpen
according to the instructions supplied with the
tool.
► Clamp the bar in a vise if necessary.
► Sharpen the chain frequently, take away as lit‐
tle metal as possible – two or three strokes of
the file are usually enough.
0458-555-8321-C