Balls again _ continuing problems

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- Graham Nichols
  
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posted
20 years ago

Sun, Jul 27, 2003 7:58 AM

Thanks to everyone who responded to my recent questions on how to best make acceptably round spheres (40mm diameter). I was able to start constructing a device for the lathe from a description from Fred Holder and straight away I was able to strart experimenting using the pieces of tube as a tool. However no matter how I tried to sharpen the end of the pipe I could not get an edge that would cut. I tried "internal grinding" "flat grinding" and "external grinding" as well as every angle in between. I tried to email for more detail to several of the people how responded to my initial posting but so far I haven't herd back from them. If anyone reading this can give me a further clue - maybe a sketch ? - in how ths tube is made to cut I would be very grateful. regards G

- B
- Bob Pritchard
  
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posted
20 years ago

Sun, Jul 27, 2003 10:37 AM

I responded to you 2 times. Maybe you didn't get them. Check your e-mail for a picture of a sphere scraper I made. Bob, Naugatuck Ct.

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- Leo Lichtman
  
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posted
20 years ago

Sun, Jul 27, 2003 4:22 PM

Graham Nichols wrote: (clip) However no matter how I tried to sharpen the end of the pipe I could not get an edge that would cut. (clip) ^^^^^^^^^^ I have had success (and I know others as well) using a hole saw, with the teeth ground off, and sharened. This is made of hard steel. A pipe is fairly soft, and will not hold an edge, even if you do get it sharp.