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