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