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Transmission precision roller chain sprocket

GB1244-85
SprocketParameter of tooth department mm
type
P
d-∮
B1
C
r3
H
DIN8187
08B
12.70
7.95
7.20
1.6
13.5
10
ISO/R 606
10B
15.875
10.16
8.70
2
17
12
ANSI B 29.1
12B
19.05
11.91
11.6
2.4
20
15
1/2"×5/16 08A
Z
External diameter de
Internal diameter dp
Internal diameter D1
dm
8
39.3
33.18
8
20
9
43.2
37.13
8
24
10
47.2
41.10
8
28
11
51.2
45.07
8
32
12
55.2
49.07
8
25
13
59.2
53.06
10
40
14
63.2
57.07
10
44
15
67.2
61.09
10
48
16
71.2
65.10
10
52
17
75.2
69.11
10
56
18
79.2
73.14
10
60
19
83.3
77.16
10
62
20
87.3
81.19
10
66
21
91.3
85.22
12
72
22
89.24
12
74
23
95.4
93.27
12
78
24
99.4
97.29
12
82
25
103.4
101.33
12
86
26
107.4
105.36
16
90
27
111.5
109.40
16
94
28
115.5
113.42
16
98
29
119.5
117.46
16
102
30
123.6
121.50
16
106
31
127.6
125.54
16
110
32
131.6
129.56
16
114
33
135.7
133.60
16
118
34
139.7
137.64
16
122
35
143.8
141.68
16
126
36
147.8
145.72
16
130
37
151.8
149.76
16
134
38
155.9
153.80
16
138
39
163.9
157.83
16
142
40
168.0
161.87
16
146
50
208.9
202.26
20
188
57
237.2
230.64
20
217
60
249.2
242.66
20
229
76
313.9
307.33
25
293
80
330.1
323.48
25
310
95
390.7
384.11
25
370
114
467.5
460.90
25
430
5/8"×3/8" 　10A
Z
External diameter de
Internal diameterdp
Internal diameter D1
dm
8
48.4
41.48
10
24
9
53.3
46.42
10
29
10
58.3
51.37
10
34
11
63.2
56.34
10
39
12
68.2
61.34
10
44
13
73.2
66.32
10
49
14
78.2
71.34
12
54
15
83.2
76.36
12
59
16
88.3
81.37
12
64
17
93.3
86.39
12
69
18
98.3
91.42
12
74
19
103.3
96.45
12
79
20
108.4
101.49
12
84
21
113.4
106.52
16
89
22
118.4
111.55
16
94
23
123.5
116.58
16
99
24
128.5
121.62
16
100
25
133.6
126.66
16
105
26
138.6
131.70
16
110
27
143.6
136.75
16
115
28
148.7
141.78
16
120
29
153.7
146.83
16
125
30
158.8
151.87
16
130
31
163.8
156.92
16
136
32
168.9
161.95
16
140
33
173.9
167.00
16
145
34
178.9
172.05
16
150
35
184.0
177.10
16
155
36
189.0
182.15
20
160
37
194.1
187.20
20
165
38
19.1
192.24
20
170
39
204.2
197.29
20
175
40
209.2
202.34
20
180
50
261.2
252.82
20
220
57
296.6
288.18
25
255
60
311.7
303.32
25
270
76
392.5
384.16
25
350
80
412.7
404.35
25
370
95
488.5
480.14
25
440
114
584.5
576.13
25
540
3/4"×1/2"　10A
Z
External diameter de
Internal diameterdp
Internal diameter D1
dm
8
58.1
49.78
10
28
9
64.0
55.70
10
33
10
70.0
61.64
10
39
11
76.0
67.61
12
45
12
81.9
73.60
12
50
13
87.9
79.59
12
56
14
94.0
85.61
16
62
15
100.0
91.63
16
68
16
106.0
97.65
16
74
17
112.0
103.67
16
80
18
118.0
109.71
16
85
19
124.1
115.75
16
90
20
130.1
121.78
16
96
21
136.2
127.82
16
102
22
142.2
133.86
16
108
23
148.2
139.90
16
114
24
154.3
145.94
16
120
25
160.3
152.00
16
125
26
166.4
158.04
16
130
27
172.4
164.09
16
136
28
178.5
170.13
16
142
29
184.5
176.19
16
148
30
190.6
182.25
16
154
31
196.6
188.31
20
160
32
202.7
194.35
20
166
33
208.8
200.40
20
172
34
214.8
206.46
20
178
35
220.9
212.52
20
184
36
226.9
218.58
20
190
37
233.0
224.64
20
195
38
239.0
230.69
20
200
39
245.1
236.75
20
205
40
251.1
242.81
20
210
50
313.6
303.39
25
270
57
356.1
345.81
25
310
60
374.2
363.99
25
330
76
471.2
460.99
25
430
80
495.5
485.22
25
440
95
586.4
576.17
25
540
114
701.6
691.36
25
650

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