Call (888)-671-2883
 on most items
Text message to Live Chat! (201) 898 - 2676

28B20 Metric Roller Chain Sprocket

BRAND: Martin Sprocket | MODEL: 28B20 | CONDITION: NEW | SKU: 260641
28B20 Metric Roller Chain Sprocket

Image for Illustration purposes only,
Actual product may vary
Typically In Stock: confirm availability
Returnable: see conditions
Shipping from?: see locations Typically ships in 1 day
Weight: 37.12 lbs UOM: EA

Additional Description

Technical Specifications

Pitch 44.450 mm
Number Of Teeth 20
Outside Dia 311.767 mm
Material Steel
Pitch Diameter 284.145 mm


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 29.439 mm
Chain Number 28B-1 Hub Configuration B
Chain Pitch 44.450 mm Hub Outside Diameter 159.995 mm
Number of Chain Rows 1 Length thru Bore 64.008 mm
Number of Teeth 20 Construction Detail Welded
Outside Diameter 311.767 mm Bore Type Stock Bore
Pitch Diameter 284.145 mm Min Bore Size 40.000 mm
Single Strand Tooth Thickness 29.439 mm Max Bore Size 108.000 mm
Storage Dimension Length 12.274 in. Weight 40.43 lbs.
Storage Dimension Width 12.274 in. Individually Packaged No
Storage Dimension Height 2.520 in.