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