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