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