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
Material External Use
Steel
Hub Length
0.7 in
Martin No.
120E20H
Type
B
Tooth Width
0.924 in
Screw Size
1/2-13 NC
Hub Projection
0.7 in
Hub Dia.
6 1/4 in
Caliper Diameter
8.7137 in
Bore Size [Min]
0.875 in
O.D.
10.371 in
Single Strand Tooth Thickness
0.924 in
Bushing Bore Size [Min]
0.875 in
No. of Strands Across
1
Bushing Bore Size [Max]
3.313 in
Overall Length
1 5/8 in
Bushing Bore [Max]
3 1/2 in
Bushing Type
QD
Length Through Bore
1.625 in
Sprocket Style
B
Hardened Teeth
With Hardened Teeth
Bore Size [Max]
3.313 in
Pitch Diameter
9.589 in
Outside Dia. [Min]
10.3710 in
Outside Dia.
10.371 in
Chain Sprocket Pitch
1.5 in
No. of Teeth Rows Strands
1
Overall Length Less Threads
N/A
Construction Internal
Solid
Width Across Teeth
0.924 in
Chain Sprocket Number
120
Inch/Metric
Inch
Hub O.D.
6.25 in
Bushing Bore [Min]
0.875 in
Pitch Dia.
9.589 in
Material
Steel
Bore Type
Bushed
Material Internal Use
Carbon Steel
Chain No.
120
Chain Pitch
1.500 in
Bushing Series
E
No. of Teeth
20
Weight
18.08 LB
EAN or UPC
697950042565
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