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