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
Caliper Diameter
2.5674 in
Type
B
Hub Recess Depth
0.09 in
Pitch Dia.
2.879 in
Construction Internal
Solid With Recess Groove
Overall Length
1 in
Length Through Bore
1 in
No. of Strands Across
1
Bushing Bore [Min]
0.5 in
Inch/Metric
Inch
Chain No.
40
Chain Pitch
0.500 in
Tooth Width
0.284 in
Hub Length
0.72 in
Hub Recessed
1
Hub O.D.
2.469 in
Bore Size [Min]
0.5 in
Bushing Series
1210
Width Across Teeth
1 in
Bushing Type
Taper Lock
Hub OD @ Recess
2.3 in
Outside Dia. [Min]
3.136 in
No. of Teeth Rows Strands
1
Material Internal Use
Carbon Steel
Hub Recess Width
0.19 in
Martin No.
40BTB18H
Hub Dia.
2.4688 in
Hardened Teeth
With Hardened Teeth
Bore Type
Bushed
Bushing Bore [Max]
1.25 in
Overall Length Less Threads
N/A
Pitch Diameter
2.8794 in
Material External Use
Steel
Chain Sprocket Pitch
0.5 in
Bushing Bore Size [Min]
0.5 in
Single Strand Tooth Thickness
0.284 in
Bushing Bore Size [Max]
1.25 in
Hub Projection
0.72 in
Outside Dia.
3.136 in
Material
Steel
Chain Sprocket Number
40
Bore Size [Max]
1.25 in
Sprocket Style
B
O.D.
3.136 in
No. of Teeth
18
Weight
0.65 LB
EAN or UPC
697950043036
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