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  1. N

    What speeds and feeds for grooving on a lathe?

    Hey guys. I'm having trouble with getting a nice finish on 440c. The part dia. is 1”, length is 12” and I’m grooving to .800. I am using step jaws and holding onto about .300 and I have a tailstock at the other end. Any suggestions on feeds and speeds?
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    Newbie Machinist Seeking Advice

    I agree you should reach out to guy and see if the position is still available. That being said, I think that experience is overrated. It shouldn’t matter if the you have 2 or 4 years of experience. What really matters is whether or not you can do the job and do it well.
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    Cloudy finish on 4140

    Thanks.
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    Cloudy finish on 4140

    Thanks
  5. N

    Cloudy finish on 4140

    Okay, thanks.
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    Cloudy finish on 4140

    No, I bumped it up to 4000. I’ll try the slower feed and see if that helps.
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    Cloudy finish on 4140

    Total.
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    Over Voltage Alarm

    Thanks
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    Over Voltage Alarm

    Okay, appreciate it.
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    Over Voltage Alarm

    Hi guys, Any idea what is causing this alarm? I’m running a HAAS lathe.
  11. N

    Cloudy finish on 4140

    I’m using a coated cermet insert, taking a .030 DOC and running the finish at 1,000 SFM. Today, I bumped it up to 1,200 SFM but I’m still getting the same finish.
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    Cloudy finish on 4140

    Okay, I’ll try that. Thanks
  13. N

    Cloudy finish on 4140

    Yes, I’m using coolant.
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    Cloudy finish on 4140

    Okay, I'll try that.
  15. N

    Cloudy finish on 4140

    I’ll give this a try. Thanks.
  16. N

    Cloudy finish on 4140

    It’s .015
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    Cloudy finish on 4140

    Hey fellas, Any recommendations on FEED, SFM, DOC for 4140 steel? The finish diameter is 1 inch. I’m using a 35 degree insert w/ .015 TNR and running 1000 SFM, 3000 RPM, .030 DOC, and F.005 for the finishing OP. I’ve tried a lower DOC of .010 but got the same finish. These are recommended...
  18. N

    Determine clamping force

    Thanks
  19. N

    Determine clamping force

    "Oh, great idea Einstein!
  20. N

    Program chamfer using part off tool

    Appreciate it.
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