>I am going to motorize my hand cranked extractor. What should the rpm >of the extractor be? I believe that I wrote an article about using a furnace fan motor (2 speed) to convert a 4 frame reversible to power some years ago here. It worked well enough to extract over 100 hives efficiently. Try a search and let me know if you can't find it. Allen --- You can search the BEE-L archives by sending email to [log in to unmask] saying SEARCH BEE-L topic Substitute a key word or two for the word 'topic' above Try it -- You'll Like it! ---