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
Bore Type
Bushed
Bushing Bore Size [Min]
0.938 in
Single Strand Tooth Thickness
0.924 in
Bore Size [Max]
3 in
Bushing Bore [Max]
3 in
Type
B
No. of Teeth Rows Strands
1
Material External Use
Steel
Chain Sprocket Pitch
1.5 in
Material
Steel
Construction Internal
Welded
Outside Dia.
12.294 in
Bushing Bore [Min]
0.938 in
Chain Sprocket Number
120
O.D.
12.294 in
Hub Dia.
5 1/4 in
Hub Projection
1.08 in
Length Through Bore
2 in
Pitch Dia.
11.492 in
Overall Length Less Threads
N/A
Hardened Teeth
With Hardened Teeth
Pitch Diameter
11.4919 in
Sprocket Style
B
Caliper Diameter
10.6169 in
Chain No.
120
No. of Strands Across
1
Width Across Teeth
0.924 in
Bushing Type
Taper Lock
Material Internal Use
Carbon Steel
Bore Size [Min]
0.938 in
Chain Pitch
1.500 in
Martin No.
120BTB24H
Hub O.D.
5.25 in
Tooth Width
0.924 in
Overall Length
2 in
Bushing Bore Size [Max]
3 in
Outside Dia. [Min]
12.294 in
Inch/Metric
Inch
No. of Teeth
24
Bushing Series
3020
Hub Length
1.08 in
Weight
22.35 LB
EAN or UPC
697950065731
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