Gallery, Projects and General > How do I??

Adapting a Bedair Ball cutter to a 7x14 Seig

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Gerhard Olivier:
Chuck I looked at the plan in the link above and have an idea as to making it a bit easier to make and it might just open another line of thinking.

If you make a base that has a round centre on it with a groove right around it.  And the rotating part to fit snug over it and have 4 grub screw holes at 90 deg for dog point grub-screws to provide the tracking.The tool would fit in the toolpost like older style lathe tools and you would move the tool in to cut a smaller radius and out to cut bigger. You could even make 2 or 3 possible toolpost positions to keep the tool overhang down as much as poss.

Brass dog point grub screws would give nice free rotation???????

Added COC - just something to think about. NO milling needed at al.




Gerhard

Bernd:

--- Quote from: John Rudd on November 25, 2009, 04:39:06 PM ---You must be a wizard or summat....You go from a piece of flat steel with a horizontal line scribed onto it,to a fully blown ball turner in one pic.........Wow...teach me... :) :)  :doh:


--- End quote ---

Very simple John. You forget to take pictures of what your doing because you are so into your project.  :lol:

Seriously, I did forget to take pics of that part. I used a bandsaw for the removal of the waste stock and the mill to finish it up.

Bernd

Chuck in E. TN:
Well, I'm working on it. First attempt will be in aluminum. I have faced both ends of the round stock, cleaned up the outside and center drilled it and scribed the center line. Now working on the 1/2" square stock to bolt to it to mount on the tool post. Trying to figure out how to get the scribed line centered.
After a diversion looking for my scribe, that I put in the tool drawer yesterday with the matching center punch, so I could find it... The scribe and punch are both finished black, the lighting over the toolbox is poor, and the scribe chose to hide in a corner in the shadows! Found it on the 4th search of the drawer.
I will drill 3 holes in the 1/2" stock first and then bolt it to the round stock with the center bolt, and use transfer punch to mark the other 2.
Working up a big appetite for Thanksgiving Dinner at the Daughters, her indoors says I cam play for another couple of hours!

Chuck

Chuck in E. TN:
Well, I succeeded in milling the slot for the tool holder. I used 75Plus's suggestion of screwing the round to a piece of square stock that would fit my tool post. Thanks, Joe. I had to shim the square stock to get it back on center.
The mill was a double end 4 flute that I inherited from my Dad. It had masking tape on the cutters, but it was so old, I couldn't get it off.
The round protested greatly when I hit the center hole and when the cutter came out the front side. I ran the work into the cutter from the operators side. I went .400 deep with the slot in fewer passes than I expected!
Now to figure out how to drill the holes for the clamp screws. Any suggestions?  Center drill on round stock? I could put the end mill in my drill press and spot 3 flat spots. Never done that before.

Chuck

Forgot the pic's:
 How do you add pic's?

Her indoors say's I got to get ready for dinner. Later.
Link to pic's: http://s571.photobucket.com/albums/ss157/chucketn/Machining/Ball_Cutter/

Chuck in E. TN:
Well, I have almost completed the Peterson/Bedair Ball cutter, with deviations... Still need to make the tool holder, and grind a bit.
It's not pretty! But, I hope,  it's functional. It's sitting on my heater, waiting for the locktite to dry. Had a heck of a time getting the center pivot screw set to where the body would turn, but not wobble.  I achieved some basic milling on the lath, with one minor foopaw. The cross slide leadscrew nut came loose from the vibration of the milling and the cross slide jumped, causing the mill to zip out of the counter boar for the tool holding screw and marked up body. Most of what I did was an experiment, and not much to tolerance.
I need to go through the lathe and adjust all the gibs again.
Then on to prepare a piece of brass for the first ball! Then again, I have more aluminum bar than brass, so aluminum it will be.
Thanks again for the guidance of the group, and all the suggestions on how to accomplish this job. I'll post pic's if the ball cutter actually works.

Chuck

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