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
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
No. of Teeth
19
Bore Size [Max]
3 in
Inch/Metric
Inch
Bushing Type
Taper Lock
Outside Dia. [Min]
9.889 in
Bushing Bore [Min]
0.938 in
Chain No.
120
Single Strand Tooth Thickness
0.924 in
Bore Type
Bushed
O.D.
9.889 in
Width Across Teeth
0.924 in
Sprocket Style
B
Pitch Diameter
9.1133 in
Hub Projection
1.08 in
Outside Dia.
9.889 in
Tooth Width
0.924 in
Material External Use
Steel
Bushing Series
3020
Caliper Diameter
8.2072 in
Chain Pitch
1.500 in
Overall Length Less Threads
N/A
Construction Internal
Welded
Chain Sprocket Number
120
Chain Sprocket Pitch
1.5 in
No. of Strands Across
1
Hardened Teeth
With Hardened Teeth
Hub O.D.
5.25 in
Bushing Bore Size [Min]
0.938 in
Pitch Dia.
9.113 in
Hub Length
1.08 in
No. of Teeth Rows Strands
1
Overall Length
2 in
Material Internal Use
Carbon Steel
Type
B
Hub Dia.
5 1/4 in
Material
Steel
Martin No.
120BTB19H
Bushing Bore Size [Max]
3 in
Bushing Bore [Max]
3 in
Bore Size [Min]
0.938 in
Length Through Bore
2 in
Weight
15.0 LB
EAN or UPC
697950043883
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