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

28BTB21H (3020) Taper Bushed Metric Roller Chain Sprocket

BRAND: Martin Sprocket | MODEL: 28BTB21H | CONDITION: NEW | SKU: 260622
28BTB21H (3020) Taper Bushed 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: 29.48 lbs UOM: EA

Additional Description

Technical Specifications

Pitch 44.450 mm
Number Of Teeth 21
Outside Dia 325.860 mm
Material Steel
Pitch Diameter 298.240 mm


A metric taper bushed sprocket is a sprocket where a tapered bushing is bolted into the taper bore that is machined in the sprocket. When installed this bushing is compressed onto the shaft providing a tight grip. Taper bushed sprockets have a tapered bushing bolted into a taper bore with hex head set screws instead of bolts.
Material Steel Width across Teeth/ Rows 29.440 mm
Chain Number 28B-1 Hub Configuration B
Chain Pitch 44.450 mm Hub Outside Diameter 133.000 mm
Number of Chain Rows 1 Construction Detail Welded
Number of Teeth 21 Bore Type Bushed TB
Outside Diameter 325.860 mm Bushing Part Number 3020
Pitch Diameter 298.240 mm Bushing Min Bore Size 23.810 mm
Single Strand Tooth Thickness 29.440 mm Bushing Max Bore Size 76.200 mm
Storage Dimension Length 12.809 in. Weight 29.48 lbs.
Storage Dimension Width 12.809 in. Individually Packaged No
Storage Dimension Height 2.000 in.