Feed rate for a mill is calculated using this formula:
fm = ft * nt * N
What is the feed rate for four flute, 5/16" cutter, cutting tool steel softer than 35 HRC running at 3000 rpm? (Answer should be to the nearest ipm)
Material Code | Depth of Cut Axial Radial Axial | Vc Cutting Speed AITIN | Chip Load Per Tooth
Side Milling | Slotting | ap ae ap | SFM | 1/8 3/16 1/4 5/16
P2 Medium and high carbon steels >0.3% C | 1.5xD 0.5XD 1xD | 520-650 | 0.0009 0.0015 0.0021 0.0023
P3 Alloy steels and Tool steels <330HB, <35HRC | 1.5xD 0.5XD 1xD | 520-590 | 0.0008 0.0011 0.0017 0.0020
P4 Alloy steels and Tool steels 340-450HB, 36-48HRC | 1.5xD 0.5XD 1xD | 460-520 | 0.0007 0.0010 0.0015 0.0016
24
16
32