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