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
No. of Strands Across
1
Type
B
Bore Type
Bushed
Bore Size [Min]
0.5 in
Chain No.
40
Overall Length Less Threads
N/A
Bushing Type
Taper Lock
Hub Recess Depth
0.08 in
No. of Teeth
20
Bushing Series
1610
Width Across Teeth
1 in
Hub OD @ Recess
2.63 in
Hub Recessed
1
Material
Steel
Bushing Bore Size [Max]
1.625 in
Bushing Bore [Min]
0.5 in
Bushing Bore [Max]
1.625 in
Hub Recess Width
0.19 in
Hardened Teeth
With Hardened Teeth
Outside Dia.
3.457 in
Bore Size [Max]
1.625 in
Hub Length
0.72 in
Single Strand Tooth Thickness
0.284 in
Pitch Dia.
3.196 in
Material Internal Use
Carbon Steel
Chain Pitch
0.500 in
No. of Teeth Rows Strands
1
Pitch Diameter
3.1962 in
Outside Dia. [Min]
3.457 in
O.D.
3.457 in
Chain Sprocket Pitch
0.5 in
Chain Sprocket Number
40
Martin No.
40BTB20H
Hub Projection
0.72 in
Hub O.D.
2.781 in
Material External Use
Steel
Overall Length
1 in
Length Through Bore
1 in
Inch/Metric
Inch
Bushing Bore Size [Min]
0.5 in
Tooth Width
0.284 in
Hub Dia.
2.7813 in
Sprocket Style
B
Construction Internal
Solid With Recess Groove
Caliper Diameter
2.8842 in
Weight
0.7 LB
EAN or UPC
697950043050
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