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  1. #1
    Join Date
    Mar 2015
    Posts
    20

    Milling 50 RC h13

    Hey fellas,

    working on milling some 1/2" wide slots in h13 approximately 1/2" deep. cutter is a TiALN coated 3/16 carbide. Right now speeds are 250sfm(ish) feed rates are around 7ipm. chip load is about .0005

    I say "about" because I didnt program it just glanced at the mastercam settings.

    So the tool has a bit of squealing to it, but it seems to be cutting fine. Just want to make it through these 4 slots without killing the cutter. current DOC is .188. should i just go ahead and cut it full depth? Using the mastercam peel path with a 6% stepover.

    Advice is appreciated. first time cutting something this hard.

  2. #2
    Join Date
    Mar 2015
    Posts
    20

    Re: Milling 50 RC h13

    looking around the net, and according to my FSwizard calculator i should be at 8000 rpm and 36ipm. thinking maybe i need to speed it up a little

  3. #3
    Join Date
    Jun 2015
    Posts
    32

    Re: Milling 50 RC h13

    yeah milling hard material isn't as bad as one would think. it's just a little more important that you get your speed/feed/doc correct the first time!

  4. #4
    Join Date
    Apr 2013
    Posts
    17

    Re: Milling 50 RC h13

    too fast and it breaks .... too slow and it can burn out but surely the cutter supplier / manufacture would have that information ? 50 RC isn't that hard, I mill 74 RC parts

  5. #5
    Join Date
    Mar 2015
    Posts
    20

    Re: Milling 50 RC h13

    So I guess that makes me curious as to where those starting points are. I use fswizard right now on my tablet and it seems to be accurate, i just wonder where they get the values from. How do you know to use 900sfm or 1100? .... lol to think a few years ago 300sfm was scary.

  6. #6
    Join Date
    Jun 2010
    Posts
    4252

    Re: Milling 50 RC h13

    i just wonder where they get the values from
    Broken cutters and the mfrs place.

    Cheers
    Roger

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