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IndustryArena Forum > MetalWorking Machines > Okuma > drilling very small diameter on stainles
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  1. #1
    Join Date
    Dec 2011
    Posts
    4

    drilling very small diameter on stainles

    im going to drill .070 dia holes on a line and about 3/8 deep on stainless steel . what speed ,dilling cycle , Q value and feed should i use

  2. #2
    Join Date
    May 2003
    Posts
    323
    Try osg drills
    One may do lots of holes
    Regular drills never worked good for me.

  3. #3
    Join Date
    Jul 2010
    Posts
    287
    Ideally, you'd use a solid carbide drill with through tool coolant if you can find something that small. Other than that you will be in that trial and err area. Basic shop math tells one that ((3.82x75)/.07)/2 should be your rpm theoretically using a has drill. With carbide, that should be anywhere from 2-10 times that value. Chip load for that should be in the .0005" range. Peck value should be small. Start in the .015" range. Check out Mitsubishi carbide drills. You'll find better advise drilling that size in the Swiss machine forum.
    Luck.

  4. #4
    Join Date
    Mar 2009
    Posts
    1982
    yep, I agree with tea hole. Mitsubishi with through coolant. You need a 5µm or even 1µm coolant filters. Hence, you need high pressure coolant option also. Maximum rpm's. Feedrate and other details you will find out in practice.

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