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
Stocked Heat Treat
Material
Steel
Pitch Dia.
4.794 in
Overall Length
1 1/4 in
Type
B
Overall Length Less Threads
N/A
Hub O.D.
3.563 in
Martin No.
60BTB20H
Single Strand Tooth Thickness
0.444 in
Chain Sprocket Pitch
0.75 in
Tooth Width
0.444 in
Pitch Diameter
4.794 in
Hardened Teeth
With Hardened Teeth
Chain Sprocket Number
60
Bushing Bore [Max]
2 in
Hub Projection
0.81 in
No. of Teeth Rows Strands
1
Bore Type
Bushed
No. of Strands Across
1
Inch/Metric
Inch
Construction Internal
Solid
Chain No.
60
Bushing Bore [Min]
1/2 in
Chain Pitch
0.750 in
Bushing Series
2012
Outside Dia.
5.185 in
Width Across Teeth
1.25 in
No. of Teeth
20
Material Internal Use
Atomized Metals
Bore Size [Max]
2.625 in
Bushing Type
Taper Lock
Bushing Bore Size [Max]
2.625 in
O.D.
5.185 in
Length Through Bore
1.25 in
Caliper Diameter
4.3253 in
Material External Use
Steel
Outside Dia. [Min]
5.1850 in
Sprocket Style
B
Hub Length
0.81 in
Hub Dia.
3 9/16 in
Weight
1.38 LB
EAN or UPC
697950043401
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