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
Atomized Metals
Outside Dia.
4.738 in
Bushing Bore Size [Max]
2.188 in
Bushing Type
Taper Lock
Hub O.D.
3 in
Chain Sprocket Pitch
0.5 in
O.D.
4.738 in
Chain Sprocket Number
40
Single Strand Tooth Thickness
0.284 in
Bore Size [Max]
2.188 in
No. of Teeth Rows Strands
1
No. of Strands Across
1
Overall Length Less Threads
N/A
Hub Dia.
3 in
Hub Projection
0.72 in
Inch/Metric
Inch
Hardened Teeth
With Hardened Teeth
No. of Teeth
28
Type
B
Outside Dia. [Min]
4.738 in
Construction Internal
Solid
Material External Use
Steel
Bushing Bore [Min]
0.5 in
Tooth Width
0.284 in
Overall Length
1 in
Chain Pitch
0.500 in
Sprocket Style
B
Width Across Teeth
1 in
Pitch Diameter
4.4657 in
Material
Steel
Martin No.
40BTB28H
Length Through Bore
1 in
Bushing Bore [Max]
1.625 in
Hub Length
0.72 in
Caliper Diameter
4.1537 in
Bore Type
Bushed
Bushing Series
1610
Pitch Dia.
4.466 in
Chain No.
40
Weight
1.34 LB
EAN or UPC
697950043128
We're here for you
with Service Centers across the country - We have your back
Find a Service Center
