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
Hub O.D.
5.25 in
No. of Strands Across
1
Overall Length
2 in
Pitch Dia.
14.35 in
Length Through Bore
2 in
Sprocket Style
B
Bushing Bore [Min]
0.938 in
Bushing Series
3020
Pitch Diameter
14.350 in
Hub Projection
1.08 in
Martin No.
120BTB30H
Outside Dia. [Min]
15.1720 in
Type
B
Material
Steel
Hub Dia.
5 1/4 in
Caliper Diameter
13.4752 in
Chain Sprocket Pitch
1.5 in
Construction Internal
Welded
Hub Length
1.08 in
Tooth Width
0.924 in
Chain Sprocket Number
120
Width Across Teeth
0.924 in
Bushing Bore Size [Max]
3 in
Bushing Type
Taper Lock
Inch/Metric
Inch
Single Strand Tooth Thickness
0.924 in
Bushing Bore [Max]
3 in
No. of Teeth Rows Strands
1
Chain Pitch
1.500 in
Overall Length Less Threads
N/A
Chain No.
120
O.D.
15.172 in
Bore Size [Max]
3 in
Bushing Bore Size [Min]
0.938 in
Outside Dia.
15.172 in
Bore Size [Min]
0.938 in
Material Internal Use
Carbon Steel
Material External Use
Steel
No. of Teeth
30
Hardened Teeth
With Hardened Teeth
Bore Type
Bushed
Weight
31.62 LB
EAN or UPC
697950065748
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