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
No. of Teeth Rows Strands
1
Type
B
Bushing Bore [Max]
2 1/2 in
Chain Sprocket Pitch
1.25 in
Bushing Series
2517
O.D.
8.642 in
Single Strand Tooth Thickness
0.692 in
Construction Internal
Welded
Bore Type
Bushed
Sprocket Style
B
Outside Dia. [Min]
8.6420 in
Inch/Metric
Inch
Material
Steel
Hardened Teeth
With Hardened Teeth
Pitch Dia.
7.991 in
Hub Dia.
4 1/2 in
No. of Strands Across
1
Martin No.
100BTB20H
Chain No.
100
Bushing Bore Size [Max]
3.063 in
Bore Size [Max]
3.063 in
Chain Sprocket Number
100
Material External Use
Steel
Hub Length
1.06 in
Overall Length
1 3/4 in
Bushing Bore [Min]
1/2 in
Material Internal Use
Carbon Steel
Hub Projection
1.06 in
Length Through Bore
1.75 in
Width Across Teeth
1.75 in
Chain Pitch
1.250 in
Hub O.D.
4.5 in
Overall Length Less Threads
N/A
No. of Teeth
20
Tooth Width
0.692 in
Outside Dia.
8.642 in
Bushing Type
Taper Lock
Caliper Diameter
7.2406 in
Pitch Diameter
7.991 in
Weight
9.73 LB
EAN or UPC
697950043760
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