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Ball Turning Attachment

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silverhawk

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#1
I think the boring head ball turning attachments are novel, but I worry that they are changing the direction of stress where the tools cut into the work in relation to the headstock. So, I started building my own ball turning attachment out of 5"x12"x5/8" plate steel. I marked it and drilled the corners, then cross drilled the pivot point, and drill-cut the inside edge.



Then I spend too much time at the bandsaw cutting it out :











I subsequently used a grinder to clean it up. I still have yet to open up the pivot holes, install bushings, and broach the swing arm to hold the small tool holder in place. I think it will do, though.
 

Rooster

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#2
Greetings, looks like you got a good start on it, what size lathe is it for.
 

Rooster

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#4
Thanks, been thinking of making something similar for my Atlas 618.
 

brino

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#5
That's a great start, thanks for sharing.
I am "watching" for the next instalment.

-brino
 

Silverbullet

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#6
YUPP getter done , looks like it should , the plus of those is turning an arc in the shaft to build a handle grip. Handy tool to add to your lathe.
 

Hawkeye

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#7
I like your approach to saving metal. I made a similar type for my lathe, but welded the arms together. The visegrips are a temporary handle.
PA080092a.jpg

To improve stiffness for smaller radius turning, I added a second set of pivots, and later, a post to replace the 'C', mostly for concave pockets. And, of course, you have to use the tool to make the handle for it.
PA080095a.jpg
 
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