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