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View Full Version : How To Avoid Burring w/ brass v-carve?



joelschuman
10-09-2006, 02:22 PM
I'm v-carving free-machining brass plate, line engraving, 90deg carbide v-bit, .015" total depth of cut. The consensus on feeds/speeds, found by searching here and elsewhere, is 20,000-25,000 RPM, .5 ips, .010" first pass with .005" final pass. I'm getting a considerable amount of burring along the edges. That suggests metal is melting, and means I need to reduce spindle speed or increase feed rate. I'd like to avoid the trial and error approach, since this can't be an uncommon task. Who's done this before? Has anyone got the 411 on this? I'd like to avoid a secondary polishing operation if possible - I have acres of this stuff to cut! Thanks.