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 Pitch
1.500 in
Bushing Bore Size [Max]
3.313 in
Bore Size [Max]
3.313 in
Outside Dia.
10.852 in
Bushing Bore [Max]
3 1/2 in
Chain No.
120
Length Through Bore
1.625 in
Hardened Teeth
With Hardened Teeth
Hub O.D.
6.25 in
Sprocket Style
B
Material
Steel
Bore Type
Bushed
O.D.
10.852 in
No. of Teeth
21
Hub Length
0.7 in
Bushing Type
QD
Bore Size [Min]
0.875 in
No. of Strands Across
1
Martin No.
120E21H
Screw Size
1/2-13 NC
Inch/Metric
Inch
Chain Sprocket Pitch
1.5 in
Hub Dia.
6 1/4 in
Pitch Dia.
10.064 in
Pitch Diameter
10.064 in
Tooth Width
0.924 in
Overall Length
1 5/8 in
Single Strand Tooth Thickness
0.924 in
Bushing Series
E
Chain Sprocket Number
120
Caliper Diameter
9.1612 in
Material External Use
Steel
Overall Length Less Threads
N/A
Material Internal Use
Carbon Steel
Outside Dia. [Min]
10.8520 in
Hub Projection
0.7 in
Bushing Bore Size [Min]
0.875 in
Width Across Teeth
0.924 in
Construction Internal
Solid
Type
B
Bushing Bore [Min]
0.875 in
No. of Teeth Rows Strands
1
Weight
19.68 LB
EAN or UPC
697950042572
We're here for you
with Service Centers across the country - We have your back
Find a Service Center
