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20B31 Metric Roller Chain Sprocket

$262.74 Each


  • Typically ships in: 1 day
  • Weight: 28.2 lb
  • Free shipping on orders over $20

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Additional Description

Metric B Style sprockets are flat sprockets with a hub extension welded on one side. These plain bore sprockets can easily be bored to a metric or standard size to fit your application. Keyways, set screws and hardened teeth are quick alterations that can be made.
Material Steel Width across Teeth/ Rows 18.593 mm
Chain Number 20B-1 Hub Configuration B
Chain Pitch 31.750 mm Hub Outside Diameter 127.000 mm
Number of Chain Rows 1 Length thru Bore 51.003 mm
Number of Teeth 31 Construction Detail Welded
Outside Diameter 334.471 mm Bore Type Stock Bore
Pitch Diameter 313.833 mm Min Bore Size 32.000 mm
Single Strand Tooth Thickness 18.593 mm Max Bore Size 86.000 mm
Storage Dimension Length 13.168 in. Weight 29.98 lbs.
Storage Dimension Width 13.168 in. Individually Packaged No
Storage Dimension Height 2.008 in.


Pitch 31.750 mm
Number Of Teeth 31
Outside Dia 334.471 mm
Material Steel
Pitch Diameter 313.833 mm

Return policy

Item must be unused.

Item must be in it's original package.

Restocking, shipping and handling fees may apply to any return with this manufacturer.

For more information please consult


Product's availability

State of California Proposition 65 Product Warning