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