Stihl MS 180 C-BE Product Instruction Manual - Page 44

Maintaining and, Sharpening the Saw Chain - parts list

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English Maintaining and Sharpening the Saw Chain Sawing effortlessly with a properly sharpened saw chain A properly sharpened saw chain cuts through wood effortlessly even with very little pushing. Never use a dull or damaged saw chain - this leads to increased physical strain, increased vibration load, unsatisfactory cutting results and increased wear. N Clean the saw chain N Check the saw chain for cracks and damaged rivets N Replace damaged or worn chain components and adapt these parts to the remaining parts in terms of shape and level of wear - rework accordingly Carbide-tipped (Duro) saw chains are especially wear-resistant. For an optimal sharpening result, STIHL recommends STIHL servicing dealers. Compliance with the angles and dimensions listed below is absolutely necessary. An improperly sharpened saw chain - especially depth gauges that are too low - can lead to increased kickback tendency of the chain saw - risk of injury! Chain pitch a The chain pitch marking (a) is embossed in the area of the depth gauge of each cutter. Marking (a) 7 1 or 1/4 6, P or PM 2 or 325 3 or 3/8 4 or 404 Chain pitch Inches mm 1/4 P 6.35 1/4 6.35 3/8 P 9.32 0.325 8.25 3/8 9.32 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. 689BA027 KN 689BA021 KN Sharpening and side plate angles A B A Sharpening 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. B Side plate angle The correct side plate angle results automatically when the specified file holder and file diameter are used. Tooth shapes Angle (°) AB Micro = semi-chisel, e. g., 30 75 63 PMC3, 26 RMC3, 36 RMC Micro = full chisel, e. g., 30 60 63 PS3, 26 RSC, 36 RSC3 Ripping chain, e. g., 63 PMX, 36 RMX 10 75 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. 42 MS 170, MS 170 C, MS 180, MS 180 C

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MS 170, MS 170 C, MS 180, MS 180 C
English
42
Sawing effortlessly with a properly
sharpened saw chain
A properly sharpened saw chain cuts
through wood effortlessly even with very
little pushing.
Never use a dull or damaged saw chain
– this leads to increased physical strain,
increased vibration load, unsatisfactory
cutting results and increased wear.
N
Clean the saw chain
N
Check the saw chain for cracks and
damaged rivets
N
Replace damaged or worn chain
components and adapt these parts
to the remaining parts in terms of
shape and level of wear – rework
accordingly
Carbide-tipped (Duro) saw chains are
especially wear-resistant. For an optimal
sharpening result, STIHL recommends
STIHL servicing dealers.
Chain pitch
The chain pitch marking (
a
) is embossed
in the area of the depth gauge of each
cutter.
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.
Sharpening and side plate angles
A
Sharpening 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.
B
Side plate angle
The correct side plate angle results
automatically when the specified file
holder and file diameter are used.
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.
Maintaining and
Sharpening the Saw Chain
Compliance with the angles and
dimensions listed below is
absolutely necessary. An
improperly sharpened saw chain –
especially depth gauges that are
too low – can lead to increased
kickback tendency of the chain
saw –
risk of injury
!
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
689BA027 KN
a
Tooth shapes
Angle (°)
A
B
Micro = semi-chisel, e. g.,
63 PMC3, 26 RMC3,
36 RMC
30
75
Micro = full chisel, e. g.,
63 PS3, 26 RSC, 36 RSC3
30
60
Ripping chain, e. g.,
63 PMX, 36 RMX
10
75
A
B
689BA021 KN