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Thread: Ball And Radius Turning Attachment

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  1. #1
    Supporting Member rossbotics's Avatar
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    rossbotics's Tools

    Ball And Radius Turning Attachment

    I have seen different versions of radius turning tools all over the net, I have pretty much all tools to do just about anything possible, The one thing I didn't have was one of these, I probably want use it very much but never the less I made one to fit my Clausing 14" X 48 Lathe.
    I have made allot of knobs and things of that nature from time to time whenever there was a call for it, and I would always make a knurled straight knob, So I wanted to be able to make a lot of variations of handles and ball knobs.
    Click image for larger version. 

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    The main body was made from O-1 Tool Steel, The tool bit holder was made from 5/8" 303 stainless steel and so was the turning handle and radius adjusting screw.
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    There is an aluminum knurled knob on top of the radius adjustment screw, and the pivoting handle has an aluminum ball on the end of it which I made with this tool.
    Click image for larger version. 

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    The main body has 45 degree male and female dovetail slides with 6-32 screws on the side for take up which works effortless, the radius adjusting screw is 3/8"-24 for a fine adjustment,
    Click image for larger version. 

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    The lever collar was made from 2" bar stock, 4140 Heat treated, I used my BXA boring bar holder from my quick change tool post for the pivoting shaft to turn in, which was made from 3/4" 4140 Heat treated bar stock.

    I didn't do any drawings or anything just rough sketches on paper here in the shop, but with a little imagination and maybe some trial and error you can make one just as good or better.

    Happy Machining

    Doug

  2. The Following 3 Users Say Thank You to rossbotics For This Useful Post:

    Catfish (Aug 12, 2014), kbalch (Aug 11, 2014), Paul Jones (Aug 13, 2014)

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