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Transmission precision roller chain sprocket
3/4"×1/2"
Sprocket mm
12A-1-2-3
Festival distance
P
19.05
GB1244-85
Sub diameter that roll
d-∮
11.91
Radius that yuan are arc
r3
20
DIN 8188
Well up the width
C
2.4
The tooth is wide
B1
11.6
ISO/R 606
The tooth is wide
b1
11.3
The tooth is wide
B1
34.1
ANSI B 29.1
The tooth is wide
B2
56.9
Z
de
dp
Sprocketsimplex
SprocketDuplex
SprocketTriplex
dm
D1
A
dm
D2
A
dm
D3
A
8
58.1
49.78
31
12
30
9
64.0
55.70
37
12
30
10
70.0
61.64
42
12
30
42
16
45
11
76.0
67.61
46
16
35
47
16
50
12
81.9
73.60
52
16
35
53
16
50
53
20
70
13
87.9
79.59
58
16
35
59
16
50
14
94.0
85.61
64
16
35
65
20
50
65
20
70
15
100.0
91.63
70
16
35
71
20
50
71
20
70
16
106.0
97.65
75
16
35
77
20
50
77
20
70
17
112.0
103.67
80
16
35
83
20
50
83
20
70
18
118.0
109.71
80
16
35
89
20
50
89
20
70
19
124.1
115.75
80
16
35
95
20
50
95
20
70
20
130.1
121.78
80
16
35
100
20
50
100
20
70
21
136.2
127.82
90
20
40
100
20
50
100
20
70
22
142.2
122.86
90
20
40
100
20
50
23
148.2
139.90
90
20
40
110
20
50
24
154.3
145.94
90
20
40
110
20
50
25
160.3
152.00
90
20
40
120
20
50
120
25
70
26
166.4
158.04
95
20
40
120
20
50
27
172.4
194.09
95
20
40
120
20
50
28
178.5
170.13
95
20
40
120
20
50
29
184.5
176.19
95
20
40
120
20
50
30
190.6
182.25
95
20
40
120
20
50
120
25
70
31
196.6
188.31
95
20
40
120
20
50
32
202.7
194.35
95
20
40
120
20
50
33
208.8
200.40
95
20
40
120
20
50
34
214.8
206.46
95
20
40
120
20
50
35
220.9
212.52
95
20
40
120
20
50
36
266.9
218.58
100
20
40
120
20
50
37
233.0
224.64
100
20
40
120
20
50
38
239.0
230.69
100
25
40
120
25
50
39
245.1
236.75
100
25
40
120
25
50
40
251.1
242.81
100
25
40
120
25
50
42
265.2
254.93
100
25
40
45
283.3
273.10
100
25
40
48
301.5
291.27
100
25
40
50
313.6
303.39
110
25
40
54
337.9
327.64
110
25
40
57
356.1
345.81
110
25
40
60
374.2
363.99
110
25
40

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