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