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