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