Photo courtesy Delcam. Video shows trochoidal milling in 52 Rc D-2 steel using a six-flute end mill. Video courtesy Niagara Cutter
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This is an approach to rough milling in which straight lines are replaced by “curlicue” circular moves of constant radius. Potential benefits include:
- Faster metal removal. Making the constant circular curve the only direction change allows a high feed rate to be consistently maintained.
- Longer tool life. The cutting edge is in contact with the material through only about 5% of the cutter’s revolution vs. up to 50% for more conventional cutting. Cooling of the tool is improved.