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Calculating a Feed Rate
http://www.denford.com/Calculate%20Feeds.html



Approximate tooth loads for common materials when using a H.S.S. (high speed steel) cutter.

Material: Slot Cutter, End Mill Cutter, Ballnose Cutter, Facemill Cutter

Low Carbon Steel: 0.17 mm, 0.15 mm, 0.17 mm,    0.30 mm
Brass or Bronze: 0.20 mm, 0.17 mm, 0.20 mm, 0.35 mm
Aluminum/Alloys: 0.32 mm, 0.27 mm, 0.32 mm, 0.55 mm
Plastics: 0.22 mm, 0.17 mm, 0.22 mm, 0.36 mm

http://www.denford.com/Calculate%20Speeds.html