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
Bushing Bore Size [Max]
2 in
No. of Strands Across
2
Bushing Bore [Max]
2 in
Tooth Width
0.332 in
Hub Length
0.21 in
Pitch Dia.
4.987 in
Hub O.D.
4.281 in
Bore Type
Bushed
Type
B
Chain Pitch
0.625 in
Bore Size [Max]
2 in
Sprocket Style
B
Material Internal Use
Carbon Steel
Chain No.
50-2
Bushing Type
Taper Lock
Bore Size [Min]
0.5 in
Caliper Diameter
4.58 in
Length Through Bore
1.25 in
Outside Dia.
5.322 in
Pitch Diameter
4.990 in
Inch/Metric
Inch
Hardened Teeth
With Hardened Teeth
O.D.
5.322 in
Construction Internal
Solid
Bushing Series
2012
Single Strand Tooth Thickness
0.332 in
Martin No.
50BTB25H
No. of Teeth Rows Strands
2
Overall Length
1 1/4 in
Chain Sprocket Pitch
0.625 in
Width Across Teeth
1.045 in
Hub Projection
0.21 in
Overall Length Less Threads
N/A
No. of Teeth
25
Chain Sprocket Number
50
Outside Dia. [Min]
5.3220 in
Material External Use
Steel
Material
Steel
Bushing Bore Size [Min]
0.5 in
Hub Dia.
4.2813 in
Bushing Bore [Min]
0.5 in
Weight
3.81 LB
EAN or UPC
697950031491
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