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