EPT 25     STANDARD  SPROCKETS

齒  數
NO
OF
TEETH
節  徑
PITCH
DIA
Dp
外  徑
OUTSIDE
DIA
Do
A    型
A TYPE
B    型
B TYPE
孔  徑
BORE:
d
概  略
重  量
APPROX
WT(kg)
材  質
MATERIAL
孔 徑
BORE:d
輪 殼
HUB  
概  略
重  量
APPROX
WT(kg)
材  質
MATERIAL
最  小
MIN
最  大
MAX
直  徑
Dh
長  度
L
9
18.57
21
6
0.005
 
6
7
13
15
0.014
*
10
20.55
23
6
0.007
6
9
14
16
0.018
*
11
22.54
25
6
0.008
6
10
18
16
0.023
*
12
24.53
28
6
0.010
6
12
20
16
0.030
*
13
26.53
30
6
0.011
6
14
22
16
0.048
*
14
28.54
32
6
0.013
6
14
25
16
0.051
 
15
30.54
34
6
0.015
6
14
26
16
0.053
16
32.55
36
6
0.018
8
19
28
16
0.077
17
34.56
38
6
0.020
8
19
30
16
0.079
18
36.57
40
6
0.022
8
19
34
16
0.081
19
38.58
42
6
0.025
8
19
34
16
0.084
20
40.59
44
6
0.028
8
19
34
18
0.087
21
42.61
46
6
0.031
8
22
35
18
0.119
22
44.62
48
8
0.033
8
22
35
18
0.121
23
46.63
50
8
0.036
8
22
35
18
0.124
24
48.65
52
8
0.039
8
22
35
18
0.127
25
50.66
54
8
0.043
8
25
35
18
0.165
26
52.68
56
8
0.046
8
30
35
18
0.208
27
54.70
58
8
0.050
8
30
35
18
0.212
28
56.71
60
8
0.054
8
30
35
18
0.216
29
58.73
62
8
0.058
8
35
35
18
0.324
30
60.75
64
10
0.062
8
35
40
20
0.328
31
62.77
66
10
0.066
10
35
40
20
0.328
32
64.78
68
10
0.070
10
40
40
20
0.396
33
66.80
70
10
0.075
10
40
40
20
0.401
34
68.82
72
10
0.079
10
40
40
20
0.405
35
70.84
74
10
0.084
10
40
40
20
0.410
35#(S35C)
36
72.86
76
10
0.089
10
40
40
20
0.415
 
37
74.88
78
10
0.095
10
40
40
20
0.421
38
76.90
80
10
0.100
10
40
40
20
0.426
39
78.91
82
10
0.105
10
40
40
20
0.431
40
80.93
84
10
0.111
10
40
40
20
0.437
41
82.95
87
10
0.116
10
40
50
22
0.442
42
84.97
89
10
0.122
10
40
50
22
0.448
43
86.99
91
10
0.128
10
40
50
22
0.454
44
89.01
93
10
0.134
10
40
50
22
0.460
45
91.03
95
10
0.140
10
40
50
22
0.466
46
93.05
97
10
0.147
10
40
50
22
0.473
47
95.07
99
10
0.153
10
40
50
22
0.479
48
97.09
101
10
0.160
10
40
50
22
0.486
50
101.13
105
10
0.174
10
40
50
22
0.500
54
109.21
113
10
0.202
10
40
50
22
0.528
60
121.33
125
10
0.251
10
40
50
22
0.651
65
131.43
135
10
0.294
12
40
50
22
0.72
70
141.54
145
10
6.342
12
40
50
22
0.77
75
151.64
155
12
0.392
12
40
50
22
0.82
 
80
161.74
165
12
0.446
12
40
50
22
0.88
 

注:

  1. B型材質為35#鋼,表面淬火。
  2. 注有*號的鏈輪的輪殼外徑上有溝槽,溝槽的直徑Dg,9齒為10.5mm,10齒為12.5mm,13齒為18.5mm。

NOTE:

  1. Material of B type though is 35# steel , but without that tream-ebt.
  2. Sprocket marked with an asterisk ( * )has a grove at the exrternal circumference of hub.
    Goove diameter ( Dg ) are:
    9T= 10.5mm ,10T = 12.5mm, 11T = 14.5mm ,12T = 16.5mm, 13T= 18.5mm.            

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