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
Single Strand Tooth Thickness
0.924 in
Bushing Series
2012
Hardened Teeth
With Hardened Teeth
Martin No.
120BTB12H
No. of Teeth Rows Strands
1
Bore Type
Bushed
Outside Dia. [Min]
6.498 in
Hub Length
0.33 in
Overall Length
1.25 in
Material
Steel
Bore Size [Max]
2.875 in
Hub O.D.
3.563 in
Bushing Bore [Min]
0.5 in
Length Through Bore
1.25 in
Tooth Width
0.924 in
Hub Dia.
3 9/16 in
Chain No.
120
Bushing Bore Size [Max]
2.875 in
Material Internal Use
Carbon Steel
Overall Length Less Threads
N/A
O.D.
6.498 in
Caliper Diameter
4.9206 in
Chain Sprocket Pitch
1.5 in
Pitch Dia.
5.796 in
Bushing Bore [Max]
2 in
Bushing Type
Taper Lock
Chain Pitch
1.500 in
Inch/Metric
Inch
No. of Teeth
12
No. of Strands Across
1
Chain Sprocket Number
120
Material External Use
Steel
Width Across Teeth
1.25 in
Construction Internal
Solid
Pitch Diameter
5.7956 in
Hub Projection
0.33 in
Type
B
Outside Dia.
6.498 in
Sprocket Style
B
Weight
6.98 LB
EAN or UPC
697950065717
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