Table 10. Cutting Speeds and Feeds for Milling Aluminum Alloys
End Milling
Face Milling
Slit Milling
Indexable Insert Uncoated Carbide
Indexable Insert Uncoated Carbide
Indexable Insert Uncoated Carbide
Polycrystalline Diamond
HSS
HSS
Material Condi tion *
f = feed (0.001 in/tooth), s = speed (ft/min) Metric Units: f 3 25.4 = mm/rev, s 3 0.3048 = m/min
Material
Opt.
Avg. Opt.
Avg. Opt.
Avg. Opt.
Avg. Opt.
Avg. Opt.
Avg.
All wrought aluminum alloys, 6061-T651, 5000, 6000, 7000 series All aluminum sand and permanent mold casting alloys
CD ST and A f s CD ST and A
15 165
8 850
15 620
8 2020
39 755
20 1720
8 3750
4 8430
16 1600
8 4680
39 840
20 2390
Aluminum Die-Casting Alloys
f s f s f s f s f s
15 30 15 30
8 100
15 620 15 485 15 355 15 485
8 2020 8 1905 8 1385 8 1905
39 755 39 555 39 220 39 405 39 555
20 1720 20 1380
16 160 16 145
8 375 8 355
39 840 39 690 39 500 39 690
20 2390 20 2320 20 1680 20 2320
Alloys 308.0 and 319.0 Alloys 360.0 and 380.0 Alloys 390.0 and 392.0
— — — —
8 90
8 3105
4 7845
20 370 20 665
Alloy 413
8 2320 8 3105
4 4755 4 7845
ST and A AC
All other aluminum die-casting alloys
{
15 30
8 90
20 1380
16 145
8 335
Abbreviations designate: A, annealed; AC, as cast; CD, cold drawn; and ST and A, solution treated and aged, respectively. End Milling: Table data for end milling are based on a 3-tooth, 20-degree helix angle tool with a diameter of 1.0 inch, an axial depth of cut of 0.2 inch, and a radial depth of cut of 1 inch (full slot). Use Table 15b to adjust speeds for other feeds and axial depths of cut, and Table 15c to adjust speeds if the radial depth of cut is less than the tool diameter. Speeds are valid for all tool diameters. Face Milling: Table data for face milling are based on a 10-tooth, 8-inch diameter face mill, operating with a 15-degree lead angle, 3 ∕ 64 -inch nose radius, axial depth of cut = 0.1 inch, and radial depth (width) of cut = 6 inches (i.e., width of cut to cutter diameter ratio = 3 ∕ 4 ). These speeds are valid if the cutter axis is above or close to the center line of the workpiece (eccentricity is small). Under these conditions, use Table 15d to adjust speeds for other feeds and axial and radial depths of cut. For larger eccentricity (i.e., when the cutter axis to workpiece center line offset is one half the cutter diameter or more), use the end and side milling adjustment factors (Table 15b and Table 15c) instead of the face milling factors. Slit and Slot Milling: Table data for slit milling are based on an 8-tooth, 10-degree helix angle tool with a cutter width of 0.4 inch, diameter D of 4.0 inch, and a depth of cut of 0.6 inch. Speeds are valid for all tool diameters and widths. See the examples in the text for adjustments to the given speeds for other feeds and depths of cut. Tool life for all tabulated values is approximately 45 minutes; use Table 15e to adjust tool life from 15 to 180 minutes. The combined feed/speed data in this table are based on tool grades (identified in Table 16) as follows: uncoated carbide = 15; diamond = 9.
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