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