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
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
Tooth Width
0.924 in
Bore Size [Min]
0.938 in
Sprocket Style
B
Material
Steel
Construction Internal
Welded
Length Through Bore
2 in
No. of Teeth
26
Overall Length
2 in
Bushing Bore Size [Max]
3 in
Inch/Metric
Inch
Bushing Type
Taper Lock
Hub Projection
1.08 in
Bore Type
Bushed
Bushing Series
3020
Pitch Diameter
12.4443 in
Material Internal Use
Carbon Steel
No. of Teeth Rows Strands
1
Material External Use
Steel
Outside Dia. [Min]
13.254 in
No. of Strands Across
1
Hub Dia.
5 1/4 in
O.D.
13.254 in
Pitch Dia.
12.444 in
Martin No.
120BTB26H
Bore Size [Max]
3 in
Hardened Teeth
With Hardened Teeth
Caliper Diameter
11.5693 in
Width Across Teeth
0.924 in
Chain Sprocket Number
120
Bushing Bore [Min]
0.938 in
Bushing Bore [Max]
3 in
Overall Length Less Threads
N/A
Chain Pitch
1.500 in
Hub Length
1.08 in
Chain Sprocket Pitch
1.5 in
Outside Dia.
13.254 in
Hub O.D.
5.25 in
Bushing Bore Size [Min]
0.938 in
Chain No.
120
Single Strand Tooth Thickness
0.924 in
Type
B
Weight
27.4 LB
EAN or UPC
697950043906
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