Unit 2 Speeds Feeds and Tapping
Since the cutting speed for mild steel is 90 the RPM for a 3/8 high speed two flute end mill is. RPM = CS x 4 / D = 90 x 4 / 3/8 = 360 /.375 = 960 RPM To calculate the feed rate we will select .002 inches per tooth. IPM = F x N x
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