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