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