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Designation
Sprocket
Version 1
2x
Version 2
pre-drilled
DIN ISO standard
606
Body material
steel
Body surface finish
bright
D1=Pitch circle diameter
253,33
N=No. of teeth
25
B1
18,2
B2
54,6
C
3,5
D
268,4
D2
140
D3 max.
30
Division inches
1_1/4X3/4
Division mm
31,75X19,56
ISO No.
20B-2
ISO No.
20B-2
L
80
R
32

Description

Material
Steel C45.
Version
Bright, not hardened.
Note
Sprockets with hub one side for DIN ISO 606 roller chains.
The sprockets have a centre bore or are pre-drilled (this can vary due to production methods). For this reason, the dimension D3 max. given in the table is the maximum diameter of the bore that the sprockets are supplied with. This pilot hole/centre bore can be customised with a reamed hole, reamed hole with keyway or a tapped hole by the customer. Alternatively, bushes can be fitted by the customer to reduce the diameter.
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