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D40B21H Double Roller Chain Sprocket

BRAND: Martin Sprocket | MODEL: D40B21H | CONDITION: NEW | SKU: 256540
D40B21H Double Roller Chain Sprocket

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Actual product may vary
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Weight: 2.94 lbs UOM: EA

Additional Description

Technical Specifications

Number Of Teeth 21
Outside Dia 3.617"
Material Steel
Pitch 0.500 in.


Martin 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 Hub Configuration B
Chain Number 40 Hub Outside Diameter 2.750 in.
Chain Pitch 0.500 in. Length thru Bore 1.625 in.
Number of Chain Rows 2 Hub Recessed For Chain Clearance No
Number of Teeth 21 Construction Detail Solid
Outside Diameter 3.617 in. Bore Type Stock Bore
Pitch Diameter 3.355 in. Min Bore Size 0.625 in.
Single Strand Tooth Thickness 0.275 in. Max Bore Size 1.875 in.
Hardened Teeth Yes
Storage Dimension Length 3.617 in. Weight 2.96 lbs.
Storage Dimension Width 3.617 in. Individually Packaged No
Storage Dimension Height 1.625 in.