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D80R21H Double Roller Chain Sprocket bushed for MST (R1)

$193.65 Each


  • Typically ships in: 1 day
  • Weight: 9.4 lb
  • Free shipping on orders over $20
  • Contiguous U.S. States

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Additional Description

Martin Split taper sprocket is another style of bushed sprocket. The split taper bushing, when installed, offers a wide range of bore sizes.
Material Steel Hub Outside Diameter 5.500 in.
Chain Number 80 Hub Recessed For Chain Clearance No
Chain Pitch 1.000 in. Construction Detail Solid
Number of Chain Rows 2 Bore Type Bushed MST
Number of Teeth 21 Key Way Size .750 WIDE in.
Outside Diameter 7.235 in. Bushing Part Number R1
Pitch Diameter 6.710 in. Bushing Min Bore Size 1.125 in.
Single Strand Tooth Thickness 0.557 in. Bushing Max Bore Size 3.750 in.
Hardened Teeth Yes
Storage Dimension Length 7.235 in. Weight 9.42 lbs.
Storage Dimension Width 7.235 in. Individually Packaged No
Storage Dimension Height 2.000 in.


Number Of Teeth 21
Outside Dia 7.235"
Material Steel
Pitch 1.000 in.

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