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