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
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
Material
Steel
Martin No.
140E20H
No. of Teeth Rows Strands
1
Construction Internal
Welded
Overall Length
1.625 in
Hub Projection
3/4 in
Bore Size [Max]
3.313 in
Chain Pitch
1.750 in
Hub Dia.
6 1/4 in
Inch/Metric
Inch
Bore Type
Bushed
Hub Length
3/4 in
Length Through Bore
1.625 in
Pitch Dia.
11.187 in
Material External Use
Steel
No. of Strands Across
1
Single Strand Tooth Thickness
0.924 in
Chain No.
140
O.D.
12.099 in
Bore Size [Min]
0.875 in
Bushing Bore [Max]
3.5 in
Material Internal Use
Carbon Steel
Hardened Teeth
With Hardened Teeth
Outside Dia.
12.099 in
Caliper Diameter
10.1868 in
Tooth Width
0.924 in
Overall Length Less Threads
N/A
Bushing Bore Size [Max]
3.313 in
Type
B
Bushing Type
QD
Screw Size
1/2-13 NC
Outside Dia. [Min]
12.099 in
Bushing Bore [Min]
0.875 in
Pitch Diameter
11.1868 in
Chain Sprocket Number
140
Chain Sprocket Pitch
1.75 in
Hub O.D.
6.25 in
Sprocket Style
B
Bushing Series
E
Width Across Teeth
0.924 in
Bushing Bore Size [Min]
0.875 in
No. of Teeth
20
Weight
24.42 LB
EAN or UPC
697950042749
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