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