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