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
No. of Teeth
19
Inch/Metric
Inch
Hub Projection
0.72 in
Chain Pitch
0.500 in
Bore Size [Max]
1.25 in
Construction Internal
Solid
Outside Dia.
3.296 in
Bore Type
Bushed
Chain No.
40
Hub Dia.
2.4688 in
Bushing Bore Size [Max]
1.25 in
O.D.
3.296 in
Material Internal Use
Carbon Steel
Bushing Type
Taper Lock
Bushing Series
1210
Material External Use
Steel
Bushing Bore [Min]
0.5 in
Tooth Width
0.284 in
Martin No.
40BTB19H
Hardened Teeth
With Hardened Teeth
Outside Dia. [Min]
3.296 in
Bushing Bore Size [Min]
0.5 in
Overall Length Less Threads
N/A
Material
Steel
Pitch Dia.
3.038 in
Single Strand Tooth Thickness
0.284 in
Bushing Bore [Max]
1.25 in
No. of Teeth Rows Strands
1
Chain Sprocket Number
40
Caliper Diameter
2.7154 in
Width Across Teeth
1 in
Length Through Bore
1 in
Type
B
No. of Strands Across
1
Bore Size [Min]
0.5 in
Pitch Diameter
3.0378 in
Sprocket Style
B
Hub Length
0.72 in
Hub O.D.
2.469 in
Chain Sprocket Pitch
0.5 in
Overall Length
1 in
Weight
0.75 LB
EAN or UPC
697950043043
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