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
Bushing Bore Size [Min]
0.938 in
Pitch Diameter
6.710 in
Overall Length Less Threads
N/A
Hardened Teeth
With Hardened Teeth
Bushing Series
3020
Material
Steel
O.D.
7.235 in
Material Internal Use
Carbon Steel
Chain No.
80-2
Single Strand Tooth Thickness
0.557 in
Bore Size [Min]
0.938 in
Hub Dia.
5 9/16 in
Outside Dia.
7.235 in
Bore Type
Bushed
No. of Strands Across
2
Bore Size [Max]
3 in
Material External Use
Steel
Hub Projection
0.3 in
Caliper Diameter
6.07 in
Bushing Type
Taper Lock
Overall Length
2 in
Chain Pitch
1.000 in
Chain Sprocket Number
80
Chain Sprocket Pitch
1 in
Type
B
Tooth Width
0.557 in
Bushing Bore Size [Max]
3 in
Length Through Bore
2 in
Bushing Bore [Min]
0.938 in
Sprocket Style
B
Pitch Dia.
6.71 in
Bushing Bore [Max]
3 in
Inch/Metric
Inch
No. of Teeth Rows Strands
2
Construction Internal
Solid
Martin No.
80BTB21H
Width Across Teeth
1.71 in
Outside Dia. [Min]
7.2350 in
No. of Teeth
21
Hub O.D.
5.563 in
Hub Length
0.3 in
Weight
8.92 LB
EAN or UPC
697950032474
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