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