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
Overall Length Less Threads
N/A
Overall Length
2 in
No. of Teeth
20
Material Internal Use
Carbon Steel
Hub O.D.
5.25 in
Bushing Bore Size [Max]
3 in
Width Across Teeth
0.924 in
Caliper Diameter
8.7137 in
Bore Size [Max]
3 in
Pitch Dia.
9.589 in
Inch/Metric
Inch
Bushing Type
Taper Lock
Type
B
Tooth Width
0.924 in
Outside Dia. [Min]
10.3710 in
Hub Projection
1.08 in
O.D.
10.371 in
Chain Sprocket Number
120
Bushing Series
3020
Outside Dia.
10.371 in
Chain Pitch
1.500 in
Material External Use
Steel
Bushing Bore Size [Min]
0.938 in
Chain No.
120
No. of Strands Across
1
Hub Dia.
5 1/4 in
Martin No.
120BTB20H
Sprocket Style
B
Bore Size [Min]
0.938 in
Hardened Teeth
With Hardened Teeth
No. of Teeth Rows Strands
1
Single Strand Tooth Thickness
0.924 in
Hub Length
1.08 in
Construction Internal
Welded
Pitch Diameter
9.589 in
Material
Steel
Bushing Bore [Min]
0.938 in
Bushing Bore [Max]
3 in
Length Through Bore
2 in
Chain Sprocket Pitch
1.5 in
Bore Type
Bushed
Weight
16.7 LB
EAN or UPC
697950065724
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