Hardened teeth on the smaller sprocket of a roller chain drive are recommended if the drive ratio is four to one or greater or if the smaller sprocket has 24 teeth or less and is running at a speed of over 600 rpm.
features
Hardened teeth sprockets afford longer chain and sprocket life
Tolerances meet or exceed ANSI standards
Manufactured of high carbon steel
Precise machining and processes ensure consistent finish and high quality
Chain rows are parallel and precisely spaced to increase longevity of sprocket and chain
Bores are concentric to pitch line, minimizing run out
Interchangeable with other manufacturers’ Taper bushings
Outside Dia.
6.914 in
O.D.
6.914 in
Pitch Dia.
6.393 in
No. of Teeth
20
Pitch Diameter
6.390 in
Hub O.D.
5.25 in
Bushing Bore Size [Min]
0.938 in
Bushing Type
Taper Lock
Hardened Teeth
With Hardened Teeth
Hub Projection
0.3 in
Width Across Teeth
1.71 in
Chain Pitch
1.000 in
Single Strand Tooth Thickness
0.557 in
Bushing Bore [Min]
0.938 in
Material
Steel
Bore Type
Bushed
Hub Length
0.3 in
Bore Size [Min]
0.938 in
Length Through Bore
2 in
No. of Strands Across
2
Construction Internal
Solid
Outside Dia. [Min]
6.9140 in
Tooth Width
0.557 in
Sprocket Style
B
No. of Teeth Rows Strands
2
Bore Size [Max]
3 in
Bushing Bore [Max]
3 in
Caliper Diameter
5.77 in
Type
B
Inch/Metric
Inch
Overall Length Less Threads
N/A
Bushing Series
3020
Material Internal Use
Carbon Steel
Material External Use
Steel
Bushing Bore Size [Max]
3 in
Chain Sprocket Pitch
1 in
Hub Dia.
5 1/4 in
Chain No.
80-2
Chain Sprocket Number
80
Martin No.
80BTB20H
Overall Length
2 in
Weight
7.08 LB
EAN or UPC
697950032467
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