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’ Taper bushings
Stocked Heat Treat
Bushing Series
3020
Bushing Bore Size [Max]
3 in
No. of Teeth
18
Hardened Teeth
With Hardened Teeth
Width Across Teeth
0.924 in
Bushing Type
Taper Lock
Overall Length
2 in
Bore Type
Bushed
Caliper Diameter
7.7632 in
Bushing Bore [Min]
0.938 in
Inch/Metric
Inch
Pitch Dia.
8.638 in
Length Through Bore
2 in
Bushing Bore [Max]
3 in
Hub O.D.
5.25 in
Construction Internal
Welded
Martin No.
120BTB18H
Type
B
Bore Size [Min]
0.938 in
Sprocket Style
B
Tooth Width
0.924 in
Chain No.
120
No. of Strands Across
1
Single Strand Tooth Thickness
0.924 in
Outside Dia.
9.407 in
Chain Sprocket Pitch
1.5 in
Chain Sprocket Number
120
Bushing Bore Size [Min]
0.938 in
No. of Teeth Rows Strands
1
Pitch Diameter
8.638 in
Hub Projection
1.08 in
Chain Pitch
1.500 in
Material Internal Use
Carbon Steel
Material
Steel
Bore Size [Max]
3 in
Outside Dia. [Min]
9.4070 in
Hub Length
1.08 in
Hub Dia.
5 1/4 in
Material External Use
Steel
Overall Length Less Threads
N/A
O.D.
9.407 in
Weight
13.36 LB
EAN or UPC
697950043876
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