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