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