Welcome to

The Slide Rule Trading Company specializes in slide rule replacement parts.  We also buy and sell new and used slide rules and almost everything that is of interest to slide rule collectors.

If you are interested in Hemmi slide rules, be sure to visit the Hemmi Slide Rule Catalogue Raisonne.  Our Catalogue Raisonne is the most complete listing of Hemmi slide rules ever assembled.

Prices are up to date but availability changes from week to week.
 

Repair Parts The Slide Rule Trading Co. has the most extensive selection of slide rule repair parts available on the Internet. Click to see Hemmi and Post Parts Keuffel and Esser Parts Relay / Ricoh Parts
Slide Rules Click here to see our selection of new and used slide rules for sale.	How to Order For ordering and shipping information, click here.
Cases and Boxes Looking for a case for that old slide rule?  We have a few new and lots of used cases (and even a few original shelf boxes) for sale.  Click here.	Miscellaneous Information Nothing for sale--just information like How to Manage a Slide Rule Collection and How to Repair a Slide Rule plus links to Web sites we have found useful or interesting.   Click here.
Books, Literature, Ephemera  Slide rule instructions, reference books, literature, advertising. Click here.	Hemmi Catalogue Raisonne The most comprehensive listing of Hemmi slide rules available anywhere.  Click here.