Page 748 - MiSUMi 2025

Sprockets Nominal No.20B / Chains Nominal No.20B / Joint Links

QSprocket
M Material A Attachments
S45C Equivalent Set Screw
8 (Teeth Tip: Induction hardening) (Only Shaft Bore Specs. N) 8
Sprockets & Chains / Gears & Rack Gears QShaft Bore Machining Size Table Link Pitch 31.75 b2 18.5 L Shaft Bore Specs. S (New JIS Keyway+Tap) Gears & Rack Gears Sprockets & Chains /

N
Shaft Bore Specs.
(Through Hole)
Shaft Bore Dia. Keyway Set Screw
M
D
b2×t2
2-M
25·30
6
8×3.3
8
35
10×3.3
40
8
Sprockets & Chains 45·50 12×3.3 10 DO DP t2 H 120° Chains Sprockets &
14×3.8
P.08-005 Do not use in combination with 20A series chain! 6DH7 L 6DH8 6DH7 P.08-005
E Process issue: There is no guarantee
that the tooth tip of multiple products is
Gears & Rack Gears E Distance between tooth top and keyway centerline: ±0.5mm H Rack Gears Gears &
consistent with each other
*For keyway size, refer to GB/T 1095
6Shaft Bore Dia. (D)
Part Number
5
P.08-017 1Type 2Nominal 3Hub 4Number Specifications Specifications N Specifications (H7) Dp DO H L P.08-017
S
Hole
of Teeth
Type
Other New Products (T) (H8) 25 30 102.74 117 70 40 Products Other New
Model
10
11
77
127
112.68
25
30
132.65 147.5
98
13
35
30
P.08-039 12 20 30 35 40 122.68 137 88 45 P.08-039
14 35 40 45 50 142.68 157.6 108
C-SPB 20 B 15 S 40 45 50 152.72 167.7 118
N
16 40 45 50 162.75 177.7
17 45 50 172.78 187.8
18 25 45 50 182.85 197.8 120 50
19 45 50 192.91 207.9
20 45 50 202.98 217.9
Ordering Part Number (1Type · 2Nominal Model · 3Hub Type · 4Number of Teeth) - 5Hole Specifications - 6Shaft Bore Dia.
Example C-SPB20B12 - S - 20
QChain
M Material
Steel
Link Pitch 31.75
31.75 31.75
26 QSprocket and Chain Selection
This series can be used in combination with our 20B series sprocket.
(The figure shows 4 links) Do not use in combination with American standard type or Japanese
standard type 20A series sprocket, which may cause the chain
sprocket mechanism to fail to function properly!
23.8 Please choose Joint Links nominal No.20B.
min (19.56) 20.2 44 Part Number 2Number of Links Allowable
Maximum
3.6 1Type Configurable Type Fixed Type Tension kN)
φ 19.05 φ 10.19 Joint Link*
(Cotter Pin Type) 4~9998 48 links
(Circumference
* The snap type and cotter pin type Joint Links are shipped C-CHE20B (2-link increments) Length 1524mm) 18.2
randomly. Please be careful
*Joint Links are provided and needed to be installed by yourself. Part Number (1Type) - 2Number of Links
* Joint Links can also be purchased separately! Search “joint link” on Ordering
the official website. Example C-CHE20B - 48
08-015 Sprockets & Chains 08-016