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
Type
B
No. of Strands Across
1
No. of Teeth
12
Bore Type
Bushed
Chain Sprocket Number
80
O.D.
4.332 in
Hub OD @ Recess
2.7 in
Length Through Bore
1.5 in
Material External Use
Steel
Sprocket Style
B
Tooth Width
0.575 in
Bore Size [Max]
1.625 in
Bushing Bore [Min]
0.5 in
Inch/Metric
Inch
Hub Length
0.93 in
Hub Projection
0.93 in
Hub O.D.
3 in
Construction Internal
Solid With Recess Groove
Hardened Teeth
With Hardened Teeth
Bushing Bore Size [Min]
0.5 in
Chain Pitch
1.000 in
Overall Length
1 1/2 in
Hub Recess Width
0.28 in
Martin No.
80BTB12H
Outside Dia.
4.332 in
Hub Recess Depth
0.15 in
Chain No.
80
Bushing Series
1615
Bushing Bore Size [Max]
1.625 in
Overall Length Less Threads
N/A
Material
Steel
Pitch Diameter
3.864 in
Bushing Type
Taper Lock
Outside Dia. [Min]
4.3320 in
No. of Teeth Rows Strands
1
Bushing Bore [Max]
1 5/8 in
Width Across Teeth
1.5 in
Chain Sprocket Pitch
1 in
Caliper Diameter
3.2387 in
Pitch Dia.
3.864 in
Single Strand Tooth Thickness
0.575 in
Hub Recessed
1
Hub Dia.
3 in
Material Internal Use
Carbon Steel
Bore Size [Min]
0.5 in
Weight
1.88 LB
EAN or UPC
697950043517
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