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.

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 Dietzgen, Pickett, Relay/Ricoh Parts
Slide Rules for Sale Click here to see our selection of new and used slide rules for sale.	How to Order For ordering and shipping information, click here.
Books, Literature, Ephemera  Slide rule instructions, reference books, literature, advertising.	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.
Reference Material Listings of every slide rule that Hemmi and Post ever made. Hemmi Slide Rule Catalogue Raisonne: Hemmi slide rules with model numbers back to 1912. Hemmi Catalog II: Hemmi slide rules which don't seem to have model numbers.  Frederick Post Slide Rule Cross Reference: Frederick Post Slide rules back to 1903.	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.