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D20C57 C-Hub Double Roller Chain Sprocket MET

$1,704.92 Each


  • Typically ships in: 1 day
  • Weight: 141.3 lb
  • Free shipping on orders over $20
  • Contiguous U.S. States

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Additional Description

Martin metric double strand solid construction sprockets have proper spacing between chain rows. The sprockets are manufactured from high carbon steel. Martin does not stack “A” plates on multiples, but instead Martin machines teeth after the chain rows are already in place. These plain bore sprockets can easily be bored to a metric or standard size to fit your application. Keyways, set screws and harden teeth are quick alterations that can be made.
Material Steel Width across Teeth/ Rows 54.635 mm
Chain Number 20B-2 Hub Configuration C
Chain Pitch 31.750 mm Hub Outside Diameter 190.983 mm
Number of Chain Rows 2 Length thru Bore 127.000 mm
Number of Teeth 57 Construction Detail Welded
Outside Diameter 596.991 mm Bore Type Stock Bore
Pitch Diameter 576.353 mm Min Bore Size 40.000 mm
Single Strand Tooth Thickness 18.186 mm Max Bore Size 134.000 mm
Storage Dimension Length 23.504 in. Weight 157.72 lbs.
Storage Dimension Width 23.504 in. Individually Packaged No
Storage Dimension Height 5.000 in.


Number Of Teeth 57
Outside Dia 596.991 mm
Material Steel
Pitch Diameter 576.353 mm
Pitch 31.750 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