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
Length Through Bore
1.25 in
Hardened Teeth
With Hardened Teeth
Pitch Diameter
5.032 in
Overall Length Less Threads
N/A
Material Internal Use
Atomized Metals
Hub Projection
0.81 in
Hub O.D.
3.563 in
No. of Teeth
21
Sprocket Style
B
Type
B
Outside Dia.
5.426 in
Hub Dia.
3 9/16 in
Outside Dia. [Min]
5.4260 in
Bore Type
Bushed
Bore Size [Max]
2.75 in
Bushing Bore [Max]
2 in
Tooth Width
0.444 in
Material External Use
Steel
Width Across Teeth
1.25 in
Inch/Metric
Inch
Caliper Diameter
4.549 in
Construction Internal
Solid
Material
Steel
No. of Teeth Rows Strands
1
Overall Length
1 1/4 in
No. of Strands Across
1
Pitch Dia.
5.032 in
Martin No.
60BTB21H
Chain No.
60
Chain Sprocket Pitch
0.75 in
Chain Pitch
0.750 in
Bushing Series
2012
Bushing Type
Taper Lock
Bushing Bore Size [Max]
2.75 in
Hub Length
0.81 in
Chain Sprocket Number
60
O.D.
5.426 in
Single Strand Tooth Thickness
0.444 in
Bushing Bore [Min]
1/2 in
Weight
1.34 LB
EAN or UPC
697950043418
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