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
Outside Dia. [Min]
8.9240 in
Bushing Series
3020
Inch/Metric
Inch
Chain No.
120
Hub O.D.
5.25 in
Material Internal Use
Carbon Steel
Tooth Width
0.924 in
Chain Sprocket Pitch
1.5 in
Hub Dia.
5 1/4 in
Type
B
Hardened Teeth
With Hardened Teeth
Bore Type
Bushed
Bore Size [Max]
3 in
No. of Strands Across
1
Material
Steel
Caliper Diameter
7.2535 in
Bore Size [Min]
0.938 in
O.D.
8.924 in
Single Strand Tooth Thickness
0.924 in
Bushing Bore [Max]
3 in
Chain Pitch
1.500 in
Width Across Teeth
0.924 in
Hub Length
1.08 in
Pitch Dia.
8.163 in
Pitch Diameter
8.163 in
Overall Length
2 in
Material External Use
Steel
No. of Teeth
17
Martin No.
120BTB17H
No. of Teeth Rows Strands
1
Chain Sprocket Number
120
Sprocket Style
B
Bushing Type
Taper Lock
Overall Length Less Threads
N/A
Outside Dia.
8.924 in
Construction Internal
Welded
Length Through Bore
2 in
Bushing Bore [Min]
0.938 in
Hub Projection
1.08 in
Bushing Bore Size [Min]
0.938 in
Bushing Bore Size [Max]
3 in
Weight
11.82 LB
EAN or UPC
697950043869
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