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