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It would all depend on the diameter of the part you're working on. The appropriate RPM would be calculated based on a desired surface speed and the diameter of the part. 300 is way to slow for anything most people would use a pivot file on (however I use my pivot file for lots of things that most people would not).Thank you all for explaining everything for me, the other question I have is if using a lathe what is the best speed to use I assume about 300rpm.
I can't access that document, but I can't imagine a pivot file being involved in burnishing, unless the author is discussing preparation of the pivot before actually burnishing it.According to David LaBounty's phenomenal treatise on burnishing (http://www.nawcc-index.net/Articles/LaBounty-Burnishing.pdf), start slow and light and end fast and hard.