U.S. Tsubaki Power Transmission, LLC
U.S. Tsubaki Holdings, Inc.
Corporate Headquarters
301 E. Marquardt Dr.
Wheeling, IL 60090 USA

Toll Free: 800.323.7790
Phone: 847.459.9500
Fax: 847.459.9515
Email: sales@ustsubaki.com
Website: www.ustsubaki.com
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No. 25, A plate, .375" plain bore

All dimensions are nominal values and for reference only
Unit of Measure

Sprocket Specifications

Stock Bore Diameter

 N/A 0.375 in

Style

 N/A A

No. Teeth

 N/A 21

Outside Diameter

 N/A 1.809 in

Pitch Diameter

 N/A 1.678 in

Caliper Diameter

 N/A 1.543 in

Weight

 N/A 0.040 lb

Tooth Nominal Width

 N/A 0.110 in

Hardened Teeth 

 N/A No

Chain Technical Data

Pitch

 N/A 0.250 in

Chain Size

 N/A 25

Inside Width 

 N/A 0.125 in

Roller Diameter 

 N/A 0.130 in

Specifications

UPC Code

 N/A 097039308115