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| Ball or Radius cutter |
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| andyf:
--- Quote from: MadNick on December 28, 2011, 09:32:25 AM ---.... One thing about Mike's workshop solution - I cant see how you can cut convex curves with it. --- End quote --- Looking at the last photo in the mikesworkshop link, I think that if the turret was rotated clockwise by a bit more than 90 degrees to bring what (in the photo) is the LH corner of the insert into play, it would cut concave curves into the side of barstock. The insert holder might need to be modified to allow that corner to project a bit more, and an alternative position for the handle to screw into would be needed. Andy |
| MadNick:
Andy, I think you are right, it wouldnt take too much to adapt. Ill try and get more done tomorrow. Nick |
| Fergus OMore:
Nick, I've been trying to follow the 'story' so far. My question is 'Do you have either a dividing head or a rotary table?' Or 'Do you have a boring head?' If you have one and want to do balls or convex cuts, you don't need to go to all this. 'Fergus' |
| DaveH:
I have an answer: Sometimes, there is more fun to be had in making it than using it. There is also a sense of achievement in making it. One can learn a lot by just making something. And most important of all . He wants to Carry on Nick, and don't forget the pics :thumbup: :beer: DaveH |
| MadNick:
Thanks Dave, Ive been busy today, mainly cutting out the slot in the centre of the turret. Made a ballsup though and cut it a couple of mm too wide, should have paid more attention during maths at school. Its not a biggie though and think i can use it to my advantage by taking up the the clearance with a couple of gib strips which would, in fact, add to the design. As you have to work with what youve got I also thought of (i) remaking the toolpost from steel or (ii) making a toolpost from the ali I have left (this would mean having to make it from two parts). If I was going to do it the second way any does anyone have a suggestion for a good rigid design by bolting two pieces together in an L shape (I dont have the facility to weld ali). @Fergus, thanks for your comments. I do have a boring head and would be interested to learn how to use that to do this job. I did find a website last night where someone made a radius cutter to go on the boring bar but the pictures werent clear enough for me to see how to do it. Nick |
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