Improvement for my oval turnings

[Ad de Crom]

Built in 2009 an oval turning device and turned since that time several objects, but had a slack in the constructed from wood and metal spindle.
Tried to make some reinforcements by placing steel rings for the roller bearings, this was a bit of an improvement, but not fully satisfying.
My wish was always a full metal spindle, and I stumbled unexpected against a metal spindle from an old machine in a junkyard and found more useful stuff. I got it for free, after a little talk.
This is what I got my hands on, complete with two roller bearings of 50mm.

Now the job to transform it into a useful spindle, see piccy's.

Had also to make a new housing for the spindle.
Assembled today everything, and did the first run without safety shield.
See the next pics, and video

Was a nice project for filling the gab while waiting for picking up my work on the staircase.
Tomorrow the first try out.
Cheers, and thanks for looking.
Ad

 

[Bodrighy]

That looks complicated Ad but having seen some of the things you produce on it it's a great idea.

Pete

 

[ro]

Wow, very impressive!

I've spent the last 5 minutes scratching my head trying to figure out how it works. Any chance you could explain the principles? Please?

 

[Ad de Crom]

Wow, very impressive!

I've spent the last 5 minutes scratching my head trying to figure out how it works. Any chance you could explain the principles? Please?

In fact, steal the idea by watching the video from David Springett.
http://www.youtube.com/watch?v=LX12OFJHQlg
On this video he explain, better than I can , how it works.
Well the principles are very simple, a round cam set on an excentricity of the center, two bearers mounted on a slider (with two parrallel rods) and forced to follow the cam while rotating. On the fixing blocks of the bearers is mounted the faceplate. This all creates a perfect oval shape.
Something else than the complicated constructions of Bollinger, Steiner, or Volmer.
At least something you can build by your own.
Thanks for your interest.
Ad

 

[Bodrighy]

Wow, very impressive!

I've spent the last 5 minutes scratching my head trying to figure out how it works. Any chance you could explain the principles? Please?

In fact, steal the idea by watching the video from David Springett.
http://www.youtube.com/watch?v=LX12OFJHQlg
On this video he explain, better than I can , how it works.
Well the principles are very simple, a round cam set on an excentricity of the center, two bearers mounted on a slider (with two parrallel rods) and forced to follow the cam while rotating. On the fixing blocks of the bearers is mounted the faceplate. This all creates a perfect oval shape.
Something else than the complicated constructions of Bollinger, Steiner, or Volmer.
At least something you can build by your own.
Thanks for your interest.
Ad

Everything is simple when you know how Ad. I must admit it smacks of technicality to me which is another way of saying magic as far as I'm concerned.

Pete

 

[jpt]

Thats the easy one for the daddy of oval turning this is the man http://www.volmer---ovaldrehen.de/englisch.htm

If you think the oval turning chuck looks familiar it is because Vicmark now sell it.

john

 

[Woodchips2]

Thats the easy one for the daddy of oval turning this is the man http://www.volmer---ovaldrehen.de/englisch.htm

If you think the oval turning chuck looks familiar it is because Vicmark now sell it.

john

There is a video of the Vicmarc chuck here http://www.vicmarc.com/default.asp?contentID=689

Regards Keith

 

[Ad de Crom]

Here some pictures of the first results after the improvement.

The steel spindle is the improvement, something I had expected.
Cheers, Ad