This sounds a bit like the sort of technique we use for machining certain plastics, notably HDPE and certain nylons. REDUCED spindle speed (10,000 to 12,000 rpm or even slower), three or even four flute slow spiral cutters taking shallower cuts at feed speeds of between 10 and 20 metres/min. This gives a nice smooth finish and literally throws out "bullets" from the cutter
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from the Sunny Pennines, England's Backbone |