Table 15a. Recommended Feed in Inches per Tooth ( f t ) for Milling with High-Speed Steel Cutters Table 15a. (Continued) Recommended Feed in Inches per Tooth ( f t ) for Milling with High-Speed Steel Cutters
End Mills
Depth of Cut, .250 inch (6.35 mm)
Depth of Cut, .050 inch (1.27 mm)
Plain or Slab Mills
Face Mills and Shell End Mills
Slotting and Side Mills
Cutter Diameter, inch (mm)
Cutter Diameter, inch (mm)
Form Relieved Cutters
1 ∕ 2 inch (12.7 mm)
3 ∕ 4 inch (25.4 mm)
1 inch and up (19.05 mm)
1 ∕ 4 inch (6.35 mm) 1 inch and up (25.4 mm) f t = feed per tooth, inch; Metric Units: f t 3 25.4 = mm 1 ∕ 2 inch (12.7 mm) 3 ∕ 4 inch (19.05 mm)
Brinell Hardness Number 160-200 200-240 240-300 100-180 180-240 240-300
Material
.001 .001 .001 .001 .001 .001
.003 .002 .002 .003 .002 .002 .003 .004 .003 .004 .004 .004 .004 .003 .004 .002 .002 .002 .002 .002 .002 .003
.004 .003 .002 .003 .003 .002 .004 .005 .004 .005 .005 .005 .005 .004 .005 .003 .003 .003 .002 .002 .002 .004
.001 .001 .001 .001 .001 .005 .001 .002 .001 .002 .002 .002 .002 .001 .003 .001 .001 .001 .001 .001
.002 .002 .001 .002 .002 .002 .003 .003 .003 .003 .004 .003 .003 .002 .004 .002 .002 .002 .002 .002 .001 .002
.003 .003 .002 .003 .003 .002 .004 .005 .004 .005 .005 .004 .004 .003 .005 .003 .003 .002 .003 .002 .002 .003
.004 .003 .002 .004 .003 .002 .006 .006 .005 .006 .006 .005 .005 .004 .007 .003 .003 .002 .003 .003 .002 .004
.003-.010 .004 .004-.012 .002-.018 .003-.007 .004 .003-.010 .002-.006 .002-.006 .003 .002-.008 .002-.005 .003-.008 .004 .003-.012 .002-.008 .003-.008 .004 .003-.010 .002-.006 .002-.006 .003 .003-.008 .002-.005 .003-.010 .005 .004-.015 .002-.012 .003-.015 .004 .004-.020 .002-.010 .003-.015 .004 .003-.012 .002-.008 .003-.015 .004 .004-.015 .002-.010 .005-.016 .006 .005-.020 .004-.012 .004-.012 .005 .005-.020 .004-.012 .004-.014 .005 .005-.020 .004-.012 .003-.012 .004 .005-.020 .004-.012 .005-.016 .006 .008-.020 .005-.012 .002-.006 .004 .004-.008 .002-.007 .003-.007 .004 .005-.008 .002-.007 .003-.006 .003 .004-.006 .002-.007 .003-.006 .004 .004-.010 .002-.007 .003-.006 .004 .003-.008 .002-.007 .002-.005 .003 .002-.006 .002-.005 .002-.006 .004 .002-.008 .002-.006
Pearlitic-Martensitic malleable iron
Cast steel
Zinc alloys (die castings)
… .002
100-150 150-250 80-100
.002 .002 .002
Copper alloys (brasses & bronzes)
Free cutting brasses & bronzes Cast aluminum alloys—as cast Cast aluminum alloys—hardened
… .003 … .003 … .003 … .002 … .003
Wrought aluminum alloys— cold drawn Wrought aluminum alloys—hardened
Magnesium alloys Ferritic stainless steel
135-185 135-185 185-275 135-185 185-225
.001 .001 .001 .001 .001
Austenitic stainless steel
Martensitic stainless steel
225-300 .0005
.0005
Monel
100-160
.001
.001
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