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
Hardened teeth sprockets afford longer chain and sprocket life
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
Outside Dia. [Min]
3.4570 in
Bore Size [Max]
1.625 in
No. of Strands Across
2
Sprocket Style
B
Chain Pitch
0.500 in
Material Internal Use
Carbon Steel
Single Strand Tooth Thickness
0.275 in
Width Across Teeth
0.841 in
Hub O.D.
2.625 in
Chain Sprocket Pitch
0.5 in
Material
Steel
Tooth Width
0.275 in
Bushing Bore [Max]
1 5/8 in
Martin No.
40BTB20H
Type
B
Length Through Bore
1 in
No. of Teeth Rows Strands
2
Pitch Diameter
3.200 in
Bore Size [Min]
0.5 in
Bushing Bore [Min]
0.5 in
Bushing Series
1610
Pitch Dia.
3.196 in
Bushing Bore Size [Min]
0.5 in
Overall Length Less Threads
N/A
Caliper Diameter
2.88 in
Bore Type
Bushed
Bushing Bore Size [Max]
1.625 in
Material External Use
Steel
Construction Internal
Solid
Hub Length
0.16 in
No. of Teeth
20
O.D.
3.457 in
Hardened Teeth
With Hardened Teeth
Inch/Metric
Inch
Hub Projection
0.16 in
Bushing Type
Taper Lock
Outside Dia.
3.457 in
Overall Length
1 in
Chain No.
40-2
Chain Sprocket Number
40
Hub Dia.
2 5/8 in
Weight
0.77 LB
EAN or UPC
697950030944
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