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
Bushing Type
Taper Lock
Hub Recessed
1
Chain No.
40
Bushing Bore [Max]
1.25 in
Material Internal Use
Carbon Steel
Single Strand Tooth Thickness
0.284 in
Pitch Dia.
2.721 in
Overall Length
1 in
Material
Steel
Chain Sprocket Pitch
0.5 in
Length Through Bore
1 in
Hub Length
0.72 in
Construction Internal
Solid With Recess Groove
Chain Sprocket Number
40
Martin No.
40BTB17H
Bore Size [Max]
1.25 in
Overall Length Less Threads
N/A
Hub Dia.
2 3/8 in
Tooth Width
0.284 in
Inch/Metric
Inch
Chain Pitch
0.500 in
Hub O.D.
2.375 in
No. of Strands Across
1
Caliper Diameter
2.3975 in
No. of Teeth Rows Strands
1
Bushing Bore [Min]
0.5 in
Hub Projection
0.72 in
Bore Size [Min]
0.5 in
Hardened Teeth
With Hardened Teeth
Hub Recess Depth
0.09 in
Type
B
No. of Teeth
17
Hub OD @ Recess
2.2 in
Bushing Bore Size [Max]
1.25 in
Outside Dia. [Min]
2.975 in
Sprocket Style
B
O.D.
2.975 in
Material External Use
Steel
Outside Dia.
2.975 in
Bushing Bore Size [Min]
0.5 in
Pitch Diameter
2.7211 in
Width Across Teeth
1 in
Hub Recess Width
0.19 in
Bushing Series
1210
Bore Type
Bushed
Weight
0.54 LB
EAN or UPC
697950043029
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