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CNC Turning on the Sherline Mill

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Uploaded by on Mar 12, 2007

When a CNC lathe is not available, use the mill!
I need to keep the couplings aligned with the 1/4" hole. Machining them on the mill, attached to a motor, makes sure they don't wobble in use.
Turning them on the lathe never worked out right.

http://www.microstepping.com/

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Howto & Style

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Uploader Comments (microsteppingcnc)

  • You should never use a drill chuck to hold end mills. Bad idea all around. If you want to do cnc turning on you mill put a lathe chuck on the spindle and and mount a lathe tool in the vice or make a tool holder. Now you have a cnc lathe. Set y to the tool bit is centered and use x to move the bit in/out and z to feed stock. You will get a much better surface finish that with what you are doing.

  • Yes, I've since gotten a collet. But never had a problem using the chuck.

    The shaft had to be perfectly concentric with the bore. So doing it any other way would not work. I had to drive it with a motor, and cut it while it was turning.

Top Comments

  • Well said! I was going to suggest the same thing. I used to use a bridgeport all the time to turn stuff all the time. Used the quill feed for auto travel. Lathe type finish also.

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  • Get a Grizzly 3" 4 Jaw wood chuck. buy a short length of 1" - 8tpi threaded rod, lathe it down, mount it with some roller/needle bearings, lovejoy connectors, and ur set!

  • Thanks for sharing. Mount a little chuck on that stepper and do some more 4th-axis work!

  • Not that u cant do this with an old manual machine, but cnc has really changed how we do things in the workshops! Dont know If u would get a lathe as my first machine tool anymore!?

  • Another way to use the mill as a lathe is to simply put your workpiece on the spinble and clamp a lathe tool on the table (elevated of course). I've machined parts this way many times.

  • what about sharp corners?too much chatter can happen at the end of part ,u need a center or better yet just buy a cheap toolroom lathe!

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