Short pitch Transmission precision roller chains (B series):
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20B
General Dimensions
(Unit):mm
ISO Chain
NO.
ANSI Chain
NO.
Pitch
Bush Diameter
max
Width Between Inner Plates
min
Pin Diameter
max
Plate Thickness
max
Inner
Plate Depth
max
Outer
Plate Depth max
P
Dr
W
D
T1
T2
H
h
20B
20B
31.75
19.05
19.56
10.19
3.70
4.60
26.42
26.42
Dimensions of strands
Chain
NO.
Pin Length
Transverse Pitch
Average
Tensile Strength
Tensile
Strength
min
Weigtht
Per
Meter
L
max
Lc
max
L1
max
L2
max
L3
max
C
KN
KN
Kg/m
20B-1
43.20
44.67
21.60
23.07
48.57
36.45
108.60
95.00
3.99
20B-2
79.70
81.07
39.85
41.22
86.57
208.40
170.00
7.93
20B-3
116.10
117.40
58.05
59.35
123.15
285.30
250.00
11.82
