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
Chain Sprocket Number
120
Bushing Type
QD
Outside Dia.
6.986 in
Construction Internal
Solid
Martin No.
120SF13H
Single Strand Tooth Thickness
0.924 in
Tooth Width
0.924 in
Type
B
Material Internal Use
Carbon Steel
Overall Length Less Threads
N/A
Chain Sprocket Pitch
1.5 in
Outside Dia. [Min]
6.9860 in
Bushing Bore [Min]
0.5 in
Bushing Bore Size [Max]
2.938 in
No. of Strands Across
1
Hub Dia.
4 3/4 in
Chain Pitch
1.500 in
Screw Size
1/4-20 NC
Inch/Metric
Inch
O.D.
6.986 in
Material
Steel
Hub Projection
0.33 in
Hardened Teeth
With Hardened Teeth
Pitch Dia.
6.268 in
Chain No.
120
Bushing Bore Size [Min]
0.5 in
No. of Teeth Rows Strands
1
Bushing Series
SF
Bore Size [Min]
0.5 in
Bushing Bore [Max]
2 15/16 in
Width Across Teeth
0.924 in
Length Through Bore
1.25 in
Pitch Diameter
6.268 in
Material External Use
Steel
No. of Teeth
13
Sprocket Style
B
Hub O.D.
4.75 in
Bore Size [Max]
2.938 in
Caliper Diameter
5.3472 in
Overall Length
1 1/4 in
Hub Length
0.33 in
Bore Type
Bushed
Weight
6.06 LB
EAN or UPC
697950042497
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