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
Bushing Bore [Min]
1/2 in
Material Internal Use
Carbon Steel
Pitch Diameter
8.387 in
Pitch Dia.
8.387 in
Type
B
Outside Dia.
9.043 in
Bushing Series
2517
Tooth Width
0.692 in
Overall Length Less Threads
N/A
Width Across Teeth
1.75 in
Chain Sprocket Pitch
1.25 in
Bushing Type
Taper Lock
Material External Use
Steel
Length Through Bore
1.75 in
Bore Size [Max]
3.063 in
Outside Dia. [Min]
9.0430 in
Single Strand Tooth Thickness
0.692 in
Caliper Diameter
7.6134 in
Bore Type
Bushed
Sprocket Style
B
No. of Teeth Rows Strands
1
Overall Length
1 3/4 in
Hardened Teeth
With Hardened Teeth
Construction Internal
Welded
Chain No.
100
Inch/Metric
Inch
Hub O.D.
4.5 in
Material
Steel
Bushing Bore Size [Max]
3.063 in
Chain Sprocket Number
100
No. of Teeth
21
No. of Strands Across
1
Hub Projection
1.06 in
Hub Dia.
4 1/2 in
Martin No.
100BTB21H
Hub Length
1.06 in
Bushing Bore [Max]
2 1/2 in
Chain Pitch
1.250 in
O.D.
9.043 in
Weight
10.69 LB
EAN or UPC
697950043777
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