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