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