1078
Spur Sprocket
Power Mate® System
Small 7 (SM7)
Standard 7 (SD7)
Crankshaft Diameter
Drive Teeth
Rim
OEM
Chainsaw Model
Pitch
PARTNER R16 R17 R18 R19 R20 R21 R22 R420
3/8"
7
68210C
0.551"
S50 S55 S65
PIONEER 970
.325"
8
11891C
0.500"
1072 1073 1074 2071 2073 Holiday II
P-12 P-20 P-21 P-25 P-26 P-28
3/8" (91)
6 8
28001
0.394" 0.500"
.325"
11891C
POULAN 180 205
3/8" (91)
6
28004
952048078
0.407"
210 221 225 230 235 255 260 285 295
3/8" (91)
6
106114F
952048124
0.394"
3/8" (91) 3/8" (91) 3/8" (91) 3/8" (91)
6 6 6 6 7 6 7 6 7 7 7 8 7
28004
952048078 952048124 952048078 952048115 952048124 530048083 952048115
0.407" 0.394" 0.407" 0.394" 0.394" 0.500" 0.394"
106114F 28004 41569X 106656X 106114F
.325"
41726XSF
11892C
3/8" (91)
.325"
11892C
3/8" (91)
41569X
.325" .325" .325"
106656X
41726XSF
11892C 11892C 11892C 11891C 11892C
305 325
530048083
0.500" 0.500"
29175X
330 335 336 375 395 415 475
.325"
530048083
0.500"
3/8"
7
68210C
952048062 48063 503431001 952048078 952048124 952048078 952048124
0.500"
3/8"
7
68210C
1800 1950 2000 2050 2055 2075 2100 2150 2155 2175 2250 2300
3/8" (91) 3/8" (91) 3/8" (91) 3/8" (91)
6 6 6 6
28004
0.407" 0.394" 0.407" 0.394"
106114F
28004
106114F
3/8" (91) 3/8" (91)
6 6
28004
952048078 952048124
0.407" 0.394"
106114F
3/8" (91)
6
28004
952048078
0.407"
2025
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