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