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
Bushing Bore [Min]
0.5 in
Martin No.
40SH20H
Screw Size
1/4-20 UNC
No. of Strands Across
1
Type
B
Chain No.
40
Construction Internal
Solid
Hardened Teeth
With Hardened Teeth
Material External Use
Steel
Bushing Bore Size [Min]
0.5 in
Pitch Diameter
3.196 in
Bushing Series
SH
Outside Dia.
3.457 in
Chain Sprocket Pitch
0.5 in
Material
Steel
Bore Type
Bushed
Material Internal Use
Carbon Steel
Overall Length
13/16 in
Hub Dia.
2.688 in
Hub Projection
0.53 in
Single Strand Tooth Thickness
0.284 in
No. of Teeth
20
Sprocket Style
B
Chain Sprocket Number
40
Outside Dia. [Min]
3.4570 in
Hub Length
0.53 in
Overall Length Less Threads
N/A
Length Through Bore
0.812 in
Bore Size [Max]
1.688 in
Pitch Dia.
3.196 in
Chain Pitch
0.500 in
Bore Size [Min]
0.5 in
No. of Teeth Rows Strands
1
O.D.
3.457 in
Caliper Diameter
2.8842 in
Bushing Bore Size [Max]
1.688 in
Tooth Width
0.284 in
Inch/Metric
Inch
Bushing Type
QD
Hub O.D.
2.75 in
Width Across Teeth
0.284 in
Bushing Bore [Max]
1 5/8 in
Weight
0.74 LB
EAN or UPC
697950041636
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