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
Overall Length Less Threads
N/A
No. of Strands Across
1
Tooth Width
0.692 in
Material Internal Use
Carbon Steel
Bushing Bore [Max]
3 in
Hardened Teeth
With Hardened Teeth
Type
B
Chain Pitch
1.250 in
Hub Projection
1.31 in
Hub Dia.
5 1/4 in
Material External Use
Steel
Inch/Metric
Inch
Chain Sprocket Number
100
Chain No.
100
Bushing Bore Size [Max]
3.438 in
Length Through Bore
2 in
Caliper Diameter
10.4143 in
Sprocket Style
B
Bore Type
Bushed
Overall Length
2 in
Outside Dia. [Min]
11.8440 in
Pitch Diameter
11.164 in
Martin No.
100BTB28H
O.D.
11.844 in
Bore Size [Max]
3.438 in
Construction Internal
Welded
No. of Teeth
28
Width Across Teeth
2 in
Material
Steel
Chain Sprocket Pitch
1.25 in
Outside Dia.
11.844 in
Single Strand Tooth Thickness
0.692 in
Bushing Type
Taper Lock
Hub Length
1.31 in
No. of Teeth Rows Strands
1
Bushing Bore [Min]
7/8 in
Pitch Dia.
11.164 in
Bushing Series
3020
Hub O.D.
5.25 in
Weight
21.11 LB
EAN or UPC
697950065700
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