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
Chain Sprocket Number
80
Overall Length
1 3/4 in
O.D.
8.516 in
Chain Sprocket Pitch
1 in
Hub O.D.
4.25 in
No. of Teeth
25
Outside Dia. [Min]
8.5160 in
Pitch Diameter
7.979 in
Overall Length Less Threads
N/A
Inch/Metric
Inch
Hub Projection
1.19 in
Chain Pitch
1.000 in
Material
Steel
Material Internal Use
Carbon Steel
No. of Strands Across
1
Chain No.
80
Bushing Bore [Min]
1/2 in
Sprocket Style
B
Hub Dia.
4 1/4 in
Single Strand Tooth Thickness
0.575 in
Bushing Type
Taper Lock
Outside Dia.
8.516 in
Bore Size [Max]
2.875 in
Pitch Dia.
7.979 in
Hub Length
1.19 in
Material External Use
Steel
Length Through Bore
1.75 in
Hardened Teeth
With Hardened Teeth
Bore Type
Bushed
Bushing Series
2517
Bushing Bore Size [Max]
2.875 in
Type
B
Construction Internal
Welded
Width Across Teeth
1.75 in
Bushing Bore [Max]
2 1/2 in
Tooth Width
0.575 in
No. of Teeth Rows Strands
1
Caliper Diameter
7.338 in
Martin No.
80BTB25H
Weight
8.14 LB
EAN or UPC
697950043647
We're here for you
with Service Centers across the country - We have your back
Find a Service Center
