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  • Milling Feed And Speeds

    I need help I need to know is there a standard for mill feed? please help I am a welder but trying to get into machining

  • #2
    Try here for some answers.
    http://web.mit.edu/2.670/www/Tutoria...scription.html
    There are also lots of yahoo groups on milling machines most of them are brand specfic but the info is the same...Bob
    Bob Wright

    Spool Gun conversion. How To Do It. Below.
    http://www.millerwelds.com/resources...php?albumid=48

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    • #3
      grab yourself a copy of the machinery handbook. pricey but really handy for this.


      you can buy / use some really nice cutters but it all comes down to how rigid/powerful the machine you are using is.

      dont buy 60 dollar endmills for practice

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      • #4
        there is no standard. All material require a different feed and speed rate.
        don't get the two confused.
        Cutting speed is how fast the tool is turning in relation to the work on a mill or how fast the work is turning in relation to the tool on a lathe
        Feed rate is how far you move the tool per revolution in thousandths of an inch.
        aluminum is 200 Surface feet per minute
        Steel = 90 SFPM
        Tool Steel i.e. 4130/4140 a2, d2, stainless steel = 50 SFPM

        basically you need to remember a 1" end mill in a mill or a 1" bar in a lathe spinning at 360 rpm is equal to 90 surface feet per minute give or take a bit for rounding off the math.
        Cut the speed in half if you run 2" or double the speed if you run 1/2"

        feed rate is something all together different but basically no more then .005" per rev on a lathe and .030" depth for the inexperienced
        or 6 inches per minute feed at .030" depth on a mill.
        Find a machinist and ask questions.
        Machine tools are very dangerous and I've seen parts thrown across the shop or 2" bar bent 90 degrees in the lathe
        BE CAREFUL!!!!
        Miller Syncrowave 200 W/Radiator 1A & water cooled torch
        Millermatic 252 on the wish list
        Bridgeport Mill W/ 2 axis CNC control
        South bend lathe 10LX40
        K.O. Lee surface grinder 6X18
        Over 20 years as a Machinist Toolmaker
        A TWO CAR garage full of tools and a fridge full of beer
        Auto shades are for rookies
        www.KLStottlemyer.com

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        • #5
          Bob, Thanks alot, very informative for some basic info.
          Will it weld? I loooove electricity!

          Miller 251/30A spool
          Syncro200
          Spectrum 625
          O/A
          Precix 5x10 CNC Router12"Z
          Standard modern lathe
          Cheap Chinese mill that does the trick... sort of...
          horizontal 7x12 bandsaw
          Roland XC540 PRO III
          54" laminator
          hammer and screwdriver (most used)
          little dog
          pooper scooper (2nd most used...)

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          • #6
            Go over to the "practical Machinist " forum.

            John1

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            • #7
              Someone mentioned the machinery handbook, It's good but also near $75 for a new copy. A better book that I had when I was in my Tech school was the Machinist's ready reference about $20 and has 90% of what a machinist needs to know one a daily basis. Feeds, speed, chip load, tap chart, trig tables, Like I said 90% of the day to day stuff is in there. But when I could finally afford a copy of the machinery hand book i got one. It's an indispensable book.
              Kerry
              Miller Syncrowave 200 W/Radiator 1A & water cooled torch
              Millermatic 252 on the wish list
              Bridgeport Mill W/ 2 axis CNC control
              South bend lathe 10LX40
              K.O. Lee surface grinder 6X18
              Over 20 years as a Machinist Toolmaker
              A TWO CAR garage full of tools and a fridge full of beer
              Auto shades are for rookies
              www.KLStottlemyer.com

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