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