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
Bore Type
Bushed
Material Internal Use
Carbon Steel
Overall Length
1 3/4 in
Outside Dia.
5.185 in
Hub Dia.
3.9531 in
Chain No.
60-2
Hardened Teeth
With Hardened Teeth
Sprocket Style
B
Pitch Diameter
4.790 in
Bushing Bore Size [Max]
2.5 in
Hub O.D.
3.953 in
No. of Strands Across
2
Pitch Dia.
4.794 in
No. of Teeth Rows Strands
2
Construction Internal
Solid
Bushing Type
Taper Lock
No. of Teeth
20
Bushing Bore [Max]
2 1/2 in
Tooth Width
0.444 in
Type
B
Material
Steel
Caliper Diameter
4.33 in
Bore Size [Min]
0.5 in
Bushing Series
2517
Bore Size [Max]
2.5 in
O.D.
5.185 in
Chain Sprocket Pitch
0.75 in
Outside Dia. [Min]
5.1850 in
Overall Length Less Threads
N/A
Hub Projection
0.41 in
Material External Use
Steel
Bushing Bore Size [Min]
0.5 in
Length Through Bore
1.75 in
Width Across Teeth
1.341 in
Chain Pitch
0.750 in
Hub Length
0.41 in
Inch/Metric
Inch
Single Strand Tooth Thickness
0.444 in
Bushing Bore [Min]
0.5 in
Chain Sprocket Number
60
Martin No.
60BTB20H
Weight
3.12 LB
EAN or UPC
697950031989
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