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
Hub O.D.
3 in
Inch/Metric
Inch
Construction Internal
Solid
Hub Projection
0.72 in
Bore Size [Max]
2.188 in
Overall Length
1 in
Martin No.
40BTB30H
Chain Pitch
0.500 in
Overall Length Less Threads
N/A
Caliper Diameter
4.4714 in
No. of Teeth Rows Strands
1
Bushing Bore [Min]
0.5 in
Bushing Series
1610
Bushing Bore [Max]
1.625 in
Chain No.
40
Outside Dia.
5.057 in
Hub Length
0.72 in
Pitch Diameter
4.7834 in
Type
B
O.D.
5.057 in
No. of Teeth
30
Hub Dia.
3 in
Single Strand Tooth Thickness
0.284 in
Material Internal Use
Atomized Metals
Length Through Bore
1 in
Tooth Width
0.284 in
Width Across Teeth
1 in
Material
Steel
Chain Sprocket Number
40
Sprocket Style
B
No. of Strands Across
1
Hardened Teeth
With Hardened Teeth
Bore Type
Bushed
Pitch Dia.
4.783 in
Bushing Bore Size [Max]
2.188 in
Chain Sprocket Pitch
0.5 in
Material External Use
Steel
Outside Dia. [Min]
5.057 in
Bushing Type
Taper Lock
Weight
1.34 LB
EAN or UPC
697950043135
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