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
Hub Projection
0.3 in
Overall Length Less Threads
N/A
Caliper Diameter
7.34 in
Outside Dia.
8.516 in
Material External Use
Steel
Bore Type
Bushed
Inch/Metric
Inch
Sprocket Style
B
Chain Pitch
1.000 in
Pitch Dia.
7.979 in
Width Across Teeth
1.71 in
No. of Strands Across
2
Bushing Bore Size [Max]
3 in
Hardened Teeth
With Hardened Teeth
Bore Size [Min]
0.938 in
Bushing Bore [Max]
3 in
O.D.
8.516 in
Bushing Bore Size [Min]
0.938 in
Hub O.D.
6.875 in
Length Through Bore
2 in
Outside Dia. [Min]
8.5160 in
Chain No.
80-2
Single Strand Tooth Thickness
0.557 in
No. of Teeth
25
No. of Teeth Rows Strands
2
Bushing Type
Taper Lock
Bore Size [Max]
3 in
Tooth Width
0.557 in
Material Internal Use
Carbon Steel
Hub Dia.
6 7/8 in
Type
B
Overall Length
3 in
Bushing Bore [Min]
0.938 in
Martin No.
80BTB25H
Bushing Series
3020
Material
Steel
Chain Sprocket Pitch
1 in
Pitch Diameter
7.980 in
Chain Sprocket Number
80
Construction Internal
Solid
Hub Length
0.3 in
Weight
16.54 LB
EAN or UPC
697950032481
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