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