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