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
Hub Length
0.66 in
Pitch Dia.
3.995 in
Martin No.
50BTB20H
Bushing Type
Taper Lock
Outside Dia. [Min]
4.3210 in
Chain Sprocket Pitch
0.625 in
Type
B
Bore Size [Max]
2.063 in
Construction Internal
Solid
Material
Steel
Length Through Bore
1 in
Bore Type
Bushed
Overall Length Less Threads
N/A
Inch/Metric
Inch
O.D.
4.321 in
Hub Projection
0.66 in
Chain Pitch
0.625 in
Outside Dia.
4.321 in
Single Strand Tooth Thickness
0.343 in
Chain No.
50
Tooth Width
0.343 in
Pitch Diameter
3.995 in
Hub O.D.
3.25 in
Width Across Teeth
1 in
Bushing Bore [Min]
1/2 in
Bushing Bore [Max]
1 5/8 in
Overall Length
1 5/8 in
No. of Strands Across
1
Material External Use
Steel
Hub Dia.
3 1/4 in
Caliper Diameter
3.5953 in
Material Internal Use
Atomized Metals
No. of Teeth
20
Bushing Series
1610
Chain Sprocket Number
50
Sprocket Style
B
Hardened Teeth
With Hardened Teeth
No. of Teeth Rows Strands
1
Bushing Bore Size [Max]
2.063 in
Weight
1.34 LB
EAN or UPC
697950043227
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