MIC-6 Cast Aluminum Speeds and Feeds (Milling, Drilling, Turning)

    Carbide end mills in MIC-6 Cast Aluminum: 400–950 SFM. Also called MIC6, cast tool plate. Chart row used: “Aluminum Cast” (Cast aluminum plate).

    Starting point: carbide end mills

    RPM and IPM use the low end of the published range (400 SFM and the lowest chip load for each diameter range). RPM = SFM × 12 ÷ (π × D); IPM = RPM × flutes × chip load.

    MIC-6 Cast Aluminum — inch end mills
    DiameterChip load (in/tooth)RPMIPM · 2 fluteIPM · 3 flute
    1/8".000612,22314.722.0
    1/4".00086,1129.814.7
    3/8".00154,07412.218.3
    1/2".00253,05615.322.9
    3/4".00352,03714.321.4
    1".00501,52815.322.9
    MIC-6 Cast Aluminum — metric end mills (inch chip-load range the size falls in)
    DiameterChip load (in/tooth)RPMIPM · 2 fluteIPM · 3 flute
    3 mm.000612,93615.523.3
    6 mm.00086,46810.315.5
    10 mm.00253,88119.429.1
    12 mm.00253,23416.224.3
    16 mm.00352,42617.025.5
    20 mm.00501,94019.429.1
    Full published chip-load ranges
    • 1/32-1/8": .0006–.0015"
    • 1/8-1/4": .0008–.0018"
    • 1/4-3/8": .0015–.0040"
    • 3/8-1/2": .0025–.0045"
    • 1/2-3/4": .0035–.0080"
    • 3/4-1": .0050–.0100"

    Calculator — prefilled for MIC-6 Cast Aluminum

    Material library

    Tool & coating guidance

    Grade, edge geometry and coating determine usable cutting data. Sharp polished edges can suit nonferrous work; substrate and geometry still govern. No coating speed multiplier is inferred.

    Tool & cut parameters

    Manual values

    Target parameters

    Spindle RPM

    3,056

    Feed Rate (IPM)

    30.6

    Max chip hex

    0.0023"

    Chip thinning & cutter body
    %
    Radial factor ×1.09Angle factor ×1.00Programmed fz 0.0025 inMax chip hex 0.0023 in

    Fixed-angle peripheral estimate: hex = fz × radial factor × sin(KAPR). No radial correction at ≥50% engagement. Not a centered face-milling or ball-nose model. Sandvik geometry reference

    Spindle utilization25%
    Insert styles, guidelines & formulas

    RPM = (SFM × 12) / (π × D) | Feed = RPM × programmed fz × effective zc

    Square (SEMT/SNMG)
    General purpose, 90° lead angle
    Round (RPMW/RCKT)
    Ramping, 3D contouring, high feed
    Triangular (TPMX)
    Light cuts, finishing
    Octagonal (ONMU)
    Face milling; HFM suitability is body-specific

    Milling Guidelines

    • Start at 70% of max SFM, increase gradually
    • Chip load too low → rubbing & heat buildup
    • Use climb milling when machine rigidity allows
    • Radial engagement >50% → reduce feed per tooth
    • Round inserts: best for ramp-in and 3D surfaces
    Open in the full calculator workspace

    Drilling and turning

    The source chart covers carbide end mills only, so we don't list drilling or turning numbers for MIC-6 Cast Aluminum. Enter your drill or insert maker's cutting data in the drilling calculator or turning calculator.

    Machinist tips

    Chip thinning
    At light radial engagement (under half the cutter diameter) the real chip is thinner than the feed per tooth. Raise the feed to keep the chip at the chart value, or the tool rubs and wears.
    Climb vs conventional
    On a rigid CNC, climb mill so each tooth starts thick and exits thin. Use conventional milling on machines with backlash or on hard scale skins.
    Coolant and chip evacuation
    Flood coolant or a strong air blast keeps chips from welding to the flutes. Use 2 or 3 flutes for room to clear chips.

    Common questions

    What SFM should I use for MIC-6 Cast Aluminum?
    Lakeshore Carbide – General Purpose End Mill Speeds & Feeds lists 400–950 SFM for carbide end mills in the "Aluminum Cast" row. Start at the low end and adjust for your machine.
    What chip load for a 1/2" end mill in MIC-6 Cast Aluminum?
    The published range for 3/8–1/2" carbide end mills is .0025–.0045" per tooth. At 400 SFM a 3-flute 1/2" end mill runs about 3056 RPM and 22.9 IPM.
    Are these values for HSS tools, drilling or turning?
    No. The source chart covers carbide end mills only. Use your drill or insert maker's data for drilling and turning.
    6061 Aluminum speeds and feeds7075 Aluminum speeds and feeds2024 Aluminum speeds and feeds

    Sources

    Starting values only. Adjust for rigidity, tool manufacturer data and machine.

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