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’ QD bushings
Stocked Heat Treat
Sprocket Style
B
Bushing Bore [Min]
0.5 in
Bushing Bore [Max]
2 in
No. of Strands Across
1
Bushing Bore Size [Max]
2 in
Outside Dia. [Min]
4.3210 in
Tooth Width
0.343 in
Screw Size
1/4-20 UNC
O.D.
4.321 in
No. of Teeth
20
Overall Length
3/4 in
Material Internal Use
Carbon Steel
Material External Use
Steel
Chain No.
50
Hub Dia.
3 1/4 in
Bushing Series
SDS
Hub O.D.
3.25 in
Outside Dia.
4.321 in
Hub Projection
0.41 in
Width Across Teeth
0.343 in
Hardened Teeth
With Hardened Teeth
Hub Length
0.41 in
Bushing Bore Size [Min]
0.5 in
Material
Steel
Single Strand Tooth Thickness
0.343 in
Overall Length Less Threads
N/A
Inch/Metric
Inch
Chain Pitch
0.625 in
Pitch Dia.
3.995 in
Bore Size [Min]
0.5 in
Bushing Type
QD
Type
B
Martin No.
50SDS20H
Caliper Diameter
3.5953 in
No. of Teeth Rows Strands
1
Construction Internal
Solid
Bore Size [Max]
2 in
Pitch Diameter
3.995 in
Bore Type
Bushed
Chain Sprocket Pitch
0.625 in
Length Through Bore
0.75 in
Chain Sprocket Number
50
Weight
1.27 LB
EAN or UPC
697950041810
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