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
Bushing Bore [Min]
0.5 in
Outside Dia.
4.321 in
Pitch Diameter
4 in
Type
B
Bore Size [Max]
2 in
Overall Length
1 1/4 in
Hub O.D.
3.25 in
No. of Strands Across
2
Chain Sprocket Number
50
Bushing Bore Size [Max]
2 in
Overall Length Less Threads
N/A
Inch/Metric
Inch
No. of Teeth Rows Strands
2
No. of Teeth
20
Chain Sprocket Pitch
0.625 in
Bushing Bore Size [Min]
0.5 in
Bushing Type
Taper Lock
Material External Use
Steel
Chain Pitch
0.625 in
Bore Type
Bushed
Tooth Width
0.332 in
Material Internal Use
Carbon Steel
Sprocket Style
B
Martin No.
50BTB20H
O.D.
4.321 in
Construction Internal
Solid
Single Strand Tooth Thickness
0.332 in
Hardened Teeth
With Hardened Teeth
Bushing Series
2012
Chain No.
50-2
Material
Steel
Hub Dia.
3 1/4 in
Width Across Teeth
1.045 in
Caliper Diameter
3.6 in
Bushing Bore [Max]
2 in
Hub Projection
0.21 in
Pitch Dia.
3.995 in
Bore Size [Min]
0.5 in
Outside Dia. [Min]
4.3210 in
Length Through Bore
1.25 in
Hub Length
0.21 in
Weight
1.54 LB
EAN or UPC
697950031477
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