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For more information about PERFORMANCE TOOLS: Click Here to go to PERFORMANCE TOOLS' web site.

On the milling machines we have here at LBCC, the feed is independent of the spindle speed.  This is a good arrangement and it permits faster feeds for larger, slowly rotating cutters.

Surface Feet per Minute (SFM). Tool Diameter (Inches). Revolutions Per Minute (RPM). Resulting surface feet per minute: