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