Table 15a. 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 100-185 100-150 150-200 120-180 180-220 220-300 125-175 175-225 225-275 275-325 175-225 225-275 275-325 325-375 150-200 200-250 120-180 180-225 225-300 110-160
Material
Free-machining plain carbon steels
.001 .001 .001 .001 .001 .001 .001 .001 .001 .001 .001 .001 .001 .001 .001 .001 .001 .001 .001 .001
.003 .003 .002 .003 .002 .002 .003 .002 .002 .002 .002 .002 .002 .002 .002 .002 .003 .002 .002 .003
.004 .003 .003 .003 .003 .002 .003 .003 .003 .002 .003 .003 .002 .002 .002 .002 .004 .003 .002 .004
.001 .001 .001 .001 .001 .001 .001 .001 .001 .001 .001 .001 .001 .001 .001 .001 .002 .001 .001 .002
.002 .002 .002 .002 .002 .001 .002 .002 .001 .001 .002 .001 .001 .001 .002 .002 .003 .002 .001 .003
.003 .003 .002 .003 .002 .002 .003 .003 .002 .002 .003 .002 .002 .002 .003 .002 .004 .003 .002 .004
.004 .004 .003 .004 .003 .003 .004 .003 .003 .002 .004 .003 .003 .002 .003 .003 .004 .003 .002 .004
.003-.008 .005 .004-.012 .002-.008 .003-.008 .004 .004-.012 .002-.008 .003-.008 .004 .003-.012 .002-.008 .003-.008 .004 .004-.012 .002-.008 .003-.008 .004 .003-.012 .002-.008 .002-.006 .003 .002-.008 .002-.006 .003-.008 .004 .004-.012 .002-.008 .003-.008 .004 .003-.012 .002-.008 .002-.006 .003 .003-.008 .002-.006 .002-.005 .003 .002-.008 .002-.005 .003-.008 .004 .003-.012 .002-.008 .002-.006 .003 .003-.010 .002-.006 .002-.005 .003 .002-.008 .002-.005 .002-.004 .002 .002-.008 .002-.005 .003-.008 .004 .003-.010 .002-.006 .002-.006 .003 .003-.008 .002-.005 .004-.012 .005 .005-.016 .002-.010 .003-.010 .004 .004-.012 .002-.008 .002-.006 .003 .002-.008 .002-.005 .003-.010 .005 .005-.016 .002-.010
Plain carbon steels, AISI 1006 to 1030; 1513 to 1522
{
AISI 1033 to 1095; 1524 to 1566
{
Alloy steels having less than 3% carbon. Typical examples: AISI 4012, 4023, 4027, 4118, 4320 4422, 4427, 4615, 4620, 4626, 4720, 4820, 5015, 5120, 6118, 8115, 8620 8627, 8720, 8820, 8822, 9310, 93B17 Alloy steels having 3% carbon or more. Typical examples: AISI 1330, 1340, 4032, 4037, 4130, 4140, 4150, 4340, 50B40, 50B60, 5130, 51B60, 6150, 81B45, 8630, 8640, 86B45, 8660, 8740, 94B30
Tool steel
Gray cast iron
Free malleable iron
Made with FlippingBook - Share PDF online