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
Construction Internal
Solid
Bore Size [Min]
0.875 in
Bushing Type
QD
No. of Teeth Rows Strands
1
Overall Length
1 5/8 in
Caliper Diameter
13.4752 in
Bushing Bore Size [Max]
3.313 in
Martin No.
120E30H
Hub Length
0.7 in
Single Strand Tooth Thickness
0.924 in
Chain No.
120
Bushing Series
E
Material Internal Use
Carbon Steel
Hub O.D.
6.25 in
Bore Type
Bushed
No. of Strands Across
1
Material
Steel
Tooth Width
0.924 in
Outside Dia.
15.172 in
Chain Sprocket Number
120
O.D.
15.172 in
Type
B
Inch/Metric
Inch
Length Through Bore
1.625 in
Material External Use
Steel
Bushing Bore [Max]
3 1/2 in
Hardened Teeth
With Hardened Teeth
Pitch Diameter
14.350 in
Bushing Bore [Min]
0.875 in
Chain Pitch
1.500 in
Chain Sprocket Pitch
1.5 in
Overall Length Less Threads
N/A
Sprocket Style
B
Width Across Teeth
0.924 in
Bushing Bore Size [Min]
0.875 in
No. of Teeth
30
Screw Size
1/2-13 NC
Hub Dia.
6 1/4 in
Outside Dia. [Min]
15.1720 in
Hub Projection
0.7 in
Pitch Dia.
14.35 in
Bore Size [Max]
3.313 in
Weight
40.74 LB
EAN or UPC
697950042640
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