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