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Thread: What is Sfm ?

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  1. 02-27-2011, 08:37 PM #1
    gorby
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    What is Sfm ?

    I have to rough turn S7 on CNC lathe ,What sfm should I Use ? Thank You.
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  2. 02-27-2011, 09:42 PM #2
    TheBigJW
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    Depends on the cutting tool but a coated carbide insert should start around 500 sfm. Surface feet per minute. .008-.012 ipr (inches per revolution) feed rate roughing. Tweak from there.

    John
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  3. 02-28-2011, 12:23 AM #3
    gorby
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    Thank You The Big JW,Yes I will use coated carbide inserts depth of cut.100 per side,does this sounds right.
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  4. 02-28-2011, 02:21 AM #4
    TheBigJW
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    Quote Originally Posted by gorby View Post
    Thank You The Big JW,Yes I will use coated carbide inserts depth of cut.100 per side,does this sounds right.
    Sounds perfect for about 10 horsepower machine and good chucking on a substantial diameter with less than 1.5 times diameter overhang.

    John
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