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20BTB28H (3020) Taper Bushed Metric Roller Chain Sprocket

BRAND: Martin Sprocket | MODEL: 20BTB28H | CONDITION: NEW | SKU: 259927
20BTB28H (3020) Taper Bushed Metric Roller Chain Sprocket

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Weight: 27.00 lbs UOM: EA

Additional Description

Technical Specifications

Pitch 31.750 mm
Number Of Teeth 28
Outside Dia 304.210 mm
Material Steel
Pitch Diameter 283.570 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 18.590 mm
Chain Number 20B-1 Hub Configuration B
Chain Pitch 31.750 mm Hub Outside Diameter 133.000 mm
Number of Chain Rows 1 Construction Detail Welded
Number of Teeth 28 Bore Type Bushed TB
Outside Diameter 304.210 mm Bushing Part Number 3020
Pitch Diameter 283.570 mm Bushing Min Bore Size 23.810 mm
Single Strand Tooth Thickness 18.590 mm Bushing Max Bore Size 76.200 mm
Storage Dimension Length 11.914 in. Weight 19.44 lbs.
Storage Dimension Width 11.914 in. Individually Packaged No
Storage Dimension Height 2.000 in.