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Ball turning attachment for ml7

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von dutch27/01/2021 14:11:44
25 forum posts

Once I've finished my antique rustic look lathe stand I want to turn some nice retro brass handles for the cupboards and drawers,can anybody recommend a decent starter tool?,the crosslide mounted ones look more rigid than the long side overhang ones? Thanks again.

Jeff Dayman27/01/2021 14:48:37
2073 forum posts
45 photos

if you already have a boring head, that can be used as a robust and adjustable ball turner if a block is made to hold it and allow pivoting. A lever handle can be added to turn it across the work.

Chris Evans 627/01/2021 16:23:43
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1870 forum posts

I made one loosely based on a design by the late Steve Bedair. I believe details are still available online. Downside of the design is you really need a collet chuck as a three jaw gets in the way. Simple to make and very robust, mine is used every few weeks putting large radius on bolt heads for my motorcycle work.

Steviegtr27/01/2021 16:25:26
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1912 forum posts
253 photos

Look up Steve Jordan on youtube , he made one for his ML7. No good pointing you at the one i made because i do not think it would fit a ML7 crosslide.

Steve.

finished.jpg

Edited By Steviegtr on 27/01/2021 16:40:04

herbert punter27/01/2021 16:47:16
126 forum posts
2 photos

Warco sell a ball turner device for the ML7

Bert

Chris Evans 627/01/2021 17:34:32
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1870 forum posts

When I made mine I put a dovetail feature in the sliding part. The square edged designs look a bit vulnerable to snatching out if you get a bit ambitious.

von dutch27/01/2021 17:39:53
25 forum posts

Thanks for the replys,interesting information

Howard Lewis27/01/2021 17:49:27
4448 forum posts
8 photos

Had one for a ML7 (Impulse buy at a show ) Didn't use it much, and when left some money bought a Repton. Which a nice looking bit of kit that performs well.

So the other one sits on a shelf!

Howard

Chris Crew28/01/2021 23:07:20
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34 forum posts

I made the Radford spherical turning attachment which was subsequently improved by George Thomas. I believe similar designs are now produced by our Asian cousins but I suspect any purchase of one of these devices would be money down the drain. The reason being that if the device does not rotate on an axis very precisely at the lathe centre height all it will produce is egg-shaped monstrosities. Clearly, the only way to get the axis at the precise height is to bore the body of the device in the lathe on which it is to be used.

My device produces spheres that are perfectly satisfactory as ball handles etc. where cosmetic appearance is all that really matters. However, I have recently made the Radford worm-wheel hobbing attachment, the design of which called for universal joints rotating around a sphere rather than a 'spider'. Although the balls I produced looked perfectly spherical to the naked eye, I found that they were not as accurate as expected when rotated in the U/J casings and had to be mounted on a spigot and eased with a file in the lathe to effect a fit without any binding or rubbing.

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