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