Since some folks like @vince, @Julien, and @Kai seem to be using this calculator, I figured that it’s about time that it got updated. This thread covers the rational and discusses some of the upgrades. The Excel SFPF Workbook is in this file:2020-06-11 SFPF Workbook.zip (157.2 KB) and here’s what the three worksheets for the three spindle types look like for the Kennametal endmill speeds and feeds shown. Please let me know if there are any problems with it or questions about it.
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