Here is a useful guide to what spindle (RPM) and feed (mm/min) rates to use on the most popular materials.
It includes both Denford milling machines and routers as well as tips on what to do if you have problems.
NB It is intended as a guide only, you will have to make adjustments for your own particular setup - we will not accept responsibilty for any damage which may occur as a result of using this guide !
https://www.denfordata.com/pdfs/SpindleS ... Insert.pdf (700Kb)