D120B12

Double Strand Sprocket

Item #100806305

1.5 in Minimum Bore

2.75 in Maximum Bore

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Product Details

Maximum bores shown will accommodate standard keyseat and setscrew over keyseat. Slightly larger bores are possible with no keyseat, shallow keyseat, or setscrew at an angle to keyseat.

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’ split-taper bushings

Specifications

Length Through Bore	3.75 in
Bore Size [Min]	1.5 in
Hub Dia.	4 1/16 in
O.D.	6.498 in
Chain Sprocket Number	120
No. of Teeth	12
Hub Length Thru	2.856 in
Bushing Bore Size [Min]	1.5 in
Outside Dia. [Min]	6.498 in
Material Internal Use	Carbon Steel
Inch/Metric	Inch
Width Across Teeth	2.675 in
Outside Dia.	6.498 in
Bore Range [Min]	1.5 in
Bore Type	Finished Bore
Family Name	No. 120 - 1 1/2 in Pitch - Double - Type B & C
Martin No.	120B12
Hub O.D.	4.063 in
Finished Bore Size	1.5 in
Chain Pitch	1.500 in
Material External Use	Steel
Pitch Diameter	5.8 in
Chain Sprocket Pitch	1.5 in
Series	B
Bore Style	Minimum Bore
Pitch Diameter [Min]	5.8 in
Stock Bore Size	1.5 in
No. of Strands Across	2
Bore Range [Max]	2.75 in
Single Strand Tooth Thickness	0.894 in
Construction Internal	Solid
Chain No.	120
No. of Teeth Rows Strands	2
Bore Size [Max]	2.75 in
Pitch Dia.	5.796 in
Material	Steel
Sprocket Style	B
Bushing Bore Size [Max]	2.75 in
Hardened Teeth	Without Hardened Teeth
Caliper Diameter	4.921 in
Hub Projection	1.075 in
Bushing Bore [Min]	1.5 in
Weight	17.3 LB
EAN or UPC	697950025438