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
Material External Use
Steel
Hardened Teeth
With Hardened Teeth
Material Internal Use
Carbon Steel
Outside Dia.
8.15 in
Overall Length Less Threads
N/A
Hub O.D.
5.25 in
Pitch Diameter
7 5/16 in
Inch/Metric
Inch
O.D.
8.15 in
Tooth Width
0.924 in
Bore Type
Bushed
Material
Steel
Chain Sprocket Number
140
Sprocket Style
B
Martin No.
140BTB13H
Hub Projection
1.08 in
Chain No.
140
Width Across Teeth
0.924 in
Hub Dia.
5 1/4 in
Outside Dia. [Min]
8.1500 in
Chain Sprocket Pitch
1.75 in
Bore Size [Min]
0.938 in
Caliper Diameter
6.2592 in
Bore Size [Max]
3 in
Type
B
Length Through Bore
2 in
Overall Length
2 in
Single Strand Tooth Thickness
0.924 in
Bushing Bore Size [Max]
3 in
Bushing Bore Size [Min]
0.938 in
Pitch Dia.
7.313 in
Bushing Bore [Min]
0.938 in
Bushing Bore [Max]
3 in
Bushing Series
3020
Bushing Type
Taper Lock
Hub Length
1.08 in
No. of Teeth Rows Strands
1
No. of Teeth
13
Chain Pitch
1.750 in
Construction Internal
Welded
No. of Strands Across
1
Weight
9.1 LB
EAN or UPC
697950043920
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