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 Pitch
0.625 in
Hub O.D.
3.563 in
Bore Type
Bushed
No. of Teeth
25
Material
Steel
Pitch Dia.
4.987 in
Single Strand Tooth Thickness
0.343 in
Material External Use
Steel
Width Across Teeth
1.25 in
Hub Dia.
3 9/16 in
Hub Projection
0.91 in
Bushing Bore [Min]
1/2 in
Inch/Metric
Inch
Bushing Series
2012
Type
B
Martin No.
50BTB25H
Overall Length Less Threads
N/A
Outside Dia.
5.322 in
Bushing Type
Taper Lock
Caliper Diameter
4.5769 in
Construction Internal
Solid
Outside Dia. [Min]
5.3220 in
O.D.
5.322 in
Overall Length
2 in
Bushing Bore [Max]
2 in
Bushing Bore Size [Max]
2.063 in
Hub Length
0.91 in
Bore Size [Max]
2.063 in
Tooth Width
0.343 in
Chain Sprocket Number
50
No. of Strands Across
1
Chain Sprocket Pitch
0.625 in
Pitch Diameter
4.987 in
Sprocket Style
B
Length Through Bore
1.25 in
Chain No.
50
Material Internal Use
Atomized Metals
Hardened Teeth
With Hardened Teeth
No. of Teeth Rows Strands
1
Weight
1.34 LB
EAN or UPC
697950043272
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