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