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
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
Sprocket Style
B
Hub Projection
1.08 in
Chain Pitch
1.750 in
Chain Sprocket Pitch
1.75 in
Martin No.
140BTB18H
Length Through Bore
2 in
Bushing Bore Size [Min]
0.938 in
Hub Length
1.08 in
Material External Use
Steel
Hub O.D.
5.25 in
Hardened Teeth
With Hardened Teeth
Hub Dia.
5 1/4 in
Chain No.
140
Single Strand Tooth Thickness
0.924 in
Material
Steel
Construction Internal
Welded
No. of Strands Across
1
No. of Teeth
18
Bushing Series
3020
Tooth Width
0.924 in
No. of Teeth Rows Strands
1
Outside Dia. [Min]
10.975 in
Pitch Dia.
10.078 in
Chain Sprocket Number
140
Inch/Metric
Inch
Bore Size [Max]
3 in
Width Across Teeth
0.924 in
Outside Dia.
10.975 in
Bushing Type
Taper Lock
Overall Length Less Threads
N/A
Bore Size [Min]
0.938 in
Bushing Bore [Min]
0.938 in
Bushing Bore Size [Max]
3 in
Type
B
Caliper Diameter
9.0778 in
Pitch Diameter
10.0778 in
Overall Length
2 in
Bushing Bore [Max]
3 in
Material Internal Use
Carbon Steel
O.D.
10.975 in
Bore Type
Bushed
Weight
18.58 LB
EAN or UPC
697950043975
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