English
Chain pitch |
| Sharpening and side plate angles |
| File holder |
a |
689BA027 KN |
The chain pitch marking (a) is embossed in the area of the depth gauge of each cutter.
Marking (a) | Chain pitch | |
| Inches | mm |
7 | 1/4 P | 6.35 |
1 or 1/4 | 1/4 | 6.35 |
6, P or PM | 3/8 P | 9.32 |
2 or 325 | 0.325 | 8.25 |
3 or 3/8 | 3/8 | 9.32 |
4 or 404 | 0.404 | 10.26 |
The diameter of file to be used depends on the chain pitch – see table "Sharpening tools".
The angles of the cutter must be maintained during resharpening.
A
B | KN |
689BA021 | |
|
ASharpening angle
STIHL saw chains are sharpened with a 30° sharpening angle. Ripping chains, which are sharpened with a 10° sharpening angle, are exceptions. Ripping chains have an X in the designation.
BSide plate angle
The correct side plate angle results automatically when the specified file holder and file diameter are used.
Tooth shapes | Angle (°) | |
| A | B |
Micro = | 30 | 75 |
e. g., 63 PM3, 26 RM3, |
|
|
36 RM |
|
|
Super = full chisel tooth, | 30 | 60 |
e. g., 63 PS3, 26 RS, |
|
|
36 RS3 |
|
|
Ripping chain, e. g., | 10 | 75 |
63 PMX, 36 RMX |
|
|
The angles must be identical for all cutters in the saw chain. Varying angles: Rough, uneven running of the saw chain, increased wear – even to the point of saw chain breakage.
689BA025 KN
NUse a file holder
Always use a file holder (special accessory, see table "Sharpening tools") when sharpening saw chains by hand. File holders have markings for the sharpening angle.
Use only special saw chain files! Other files are unsuitable in terms of shape and type of cutting.
To check the angles
001BA203 KN |
STIHL filing gauge (special accessory, see table "Sharpening tools") – a universal tool for checking sharpening and side plate angles, depth gauge setting, and tooth length, as well as cleaning grooves and oil inlet holes.
46 | MS 660 |
