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