Another, another ball turner

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Divided he ad:
Nice! that way works a treat :thumbup:

Is the column going to be mounted on the diagonal as opposed to the picture of the mock up posted at the end of the last post?

Not long now till we see some ball turning swarf :ddb:

Ralph.

Stot:
Hi Ralph,

It will be exactly as in the picture. If i mount it on the diagonal the smallest radius I could turn is ~21mm without the side of the column interfering.

I mounted the tip on the diagonal to try and give the tool tips as much support as possible rather than have a huge overhang off the side of a square edge. Ill probably make another couple up to try out other mounting options, but as you say this setup should get the swarf flying. :headbang:

The threaded holes in the turret are the bit I'm not really looking forward to. :scratch: Ill figure something out. :coffee:

Cheers
Stot

No1_sonuk:

--- Quote from: Stot on May 23, 2010, 04:19:44 PM ---I may make another one later down the line but for now this should work.
--- End quote ---
This is one of the advantages of the turret design - If you need a different tool holder, it's easy to switch.
The one I made is the double-ended style like yours, but I may make a circular holder at some point (I think it was on of Ralph's post I saw one in).

madjackghengis:
Hi Stot, I like what you did with your angle plate, setting it up to take the top slide. You can make it act like a vise in a lot of ways by using a piece of stock that fits in the bottom of the slot, with drilled and tapped holes to hold things down with a strap. I've dug up a couple of inserts like what you've got, and may be changing my way of thinking on ball turning, seeing what is up on the forum. What you've got looks solid and workman like, and ought to give good service. How about a video of the ball turner in action? :poke: :thumbup: mad jack

Stot:
Well its been a few days since I touched the ball turner but I got my round-tuit in the post this morning soooo..

I bought a vise specifically to go on my cross slide and happened to have a piece of bar stock the right size for the slot in my cross slide so I drilled and tapped it, mounted the vise and tried it out and... too much flex :( :bang: I took some gouges out of the side on my first attempt at making a flat for the handle to be drilled into as you can see in one of the pics below. :doh:

Anyway I have a standard milling/drilling vise so I tried that out and blow me down it fitted nicely. :thumbup: So I started milling a flat onto the side over the cocked up bit to take the handle.

I drilled a hole for the M12 thread I was going to be putting on the handle and tapped it. You can see where the other vise flexed and the mill end took a chunk out of the side. Not the end of the world. Also from this cut you can see the vise wasnt quite square so I shimmed up the vise to straighten it out as you can see at the top of the next pics.

So then I decided to mill a flat completely along one side for the grub screws rather than trying to make 3 single flats. Drilled centers at center line and 25mm either side, then tapped to M10 to take grub screws.

And that was pretty much it. :D Other than thread the handle bar to M12.

So I screwed in the handle, chucked up a piece of scrap alluminium and gave it a go.

I roughed through most of the layers and slowed down when i got close to radius.

The last pic is after the final cut and hasnt been polished yet and it came up lovely. :) :clap: :beer:

Cheers
Stot

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