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
Bushing Bore [Max]
2 1/2 in
Pitch Dia.
7.215 in
No. of Strands Across
1
Construction Internal
Solid
Bushing Series
2517
Bushing Bore [Min]
1/2 in
Hardened Teeth
With Hardened Teeth
Length Through Bore
1.75 in
Width Across Teeth
1.75 in
No. of Teeth Rows Strands
1
Outside Dia. [Min]
7.9570 in
Sprocket Style
B
No. of Teeth
15
Hub Projection
0.83 in
Bushing Type
Taper Lock
Material
Steel
Bore Type
Bushed
Chain Pitch
1.500 in
Hub Length
0.83 in
Overall Length Less Threads
N/A
Martin No.
120BTB15H
Hub O.D.
4.25 in
Chain Sprocket Number
120
Overall Length
1 3/4 in
Chain No.
120
Bushing Bore Size [Max]
3.25 in
Material Internal Use
Carbon Steel
Material External Use
Steel
O.D.
7.957 in
Pitch Diameter
7.215 in
Outside Dia.
7.957 in
Single Strand Tooth Thickness
0.924 in
Caliper Diameter
6.3001 in
Tooth Width
0.924 in
Inch/Metric
Inch
Bore Size [Max]
3.25 in
Chain Sprocket Pitch
1.5 in
Hub Dia.
4 1/4 in
Type
B
Weight
9.02 LB
EAN or UPC
697950043845
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