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
Hardened teeth sprockets afford longer chain and sprocket life
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 Projection
0.69 in
Bushing Type
Taper Lock
Hardened Teeth
With Hardened Teeth
Hub Length
0.69 in
O.D.
6.271 in
Pitch Diameter
5.759 in
Material
Steel
Material External Use
Steel
No. of Teeth Rows Strands
1
No. of Strands Across
1
Outside Dia.
6.271 in
Bushing Bore Size [Max]
2.875 in
Chain Sprocket Pitch
1 in
Material Internal Use
Carbon Steel
Single Strand Tooth Thickness
0.575 in
Pitch Dia.
5.759 in
Outside Dia. [Min]
6.2710 in
Bushing Bore [Max]
2 in
Chain Pitch
1.000 in
Hub Dia.
3 9/16 in
Hub O.D.
3.563 in
Overall Length Less Threads
N/A
Width Across Teeth
1.25 in
Bushing Bore [Min]
1/2 in
Tooth Width
0.575 in
Bore Size [Max]
2.875 in
Construction Internal
Welded
Sprocket Style
B
Martin No.
80BTB18H
Bushing Series
2012
Chain Sprocket Number
80
Bore Type
Bushed
Overall Length
1 1/4 in
No. of Teeth
18
Chain No.
80
Caliper Diameter
5.1338 in
Type
B
Inch/Metric
Inch
Length Through Bore
1.25 in
Weight
3.87 LB
EAN or UPC
697950043579
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