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
Hub Dia.
4 3/16 in
Material External Use
Steel
Bore Size [Min]
0.5 in
Outside Dia. [Min]
5.4260 in
No. of Teeth
21
Chain Pitch
0.750 in
Chain Sprocket Pitch
0.75 in
Pitch Diameter
5.030 in
Chain No.
60-2
Hub Projection
0.41 in
Hub Length
0.41 in
No. of Teeth Rows Strands
2
Type
B
Martin No.
60BTB21H
Bushing Bore Size [Min]
0.5 in
Bushing Bore [Max]
2 1/2 in
Hardened Teeth
With Hardened Teeth
Material Internal Use
Carbon Steel
Material
Steel
Inch/Metric
Inch
Width Across Teeth
1.341 in
Sprocket Style
B
Bore Size [Max]
2.5 in
Chain Sprocket Number
60
O.D.
5.426 in
Bushing Bore Size [Max]
2.5 in
Tooth Width
0.444 in
No. of Strands Across
2
Hub O.D.
4.188 in
Pitch Dia.
5.032 in
Bushing Bore [Min]
0.5 in
Bore Type
Bushed
Construction Internal
Solid
Length Through Bore
1.75 in
Caliper Diameter
4.55 in
Single Strand Tooth Thickness
0.444 in
Outside Dia.
5.426 in
Overall Length
1 3/4 in
Overall Length Less Threads
N/A
Bushing Type
Taper Lock
Bushing Series
2517
Weight
3.76 LB
EAN or UPC
697950031996
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