Re: Plasic balls

On Tue, 13 Sep 2005 23:47:44 +0100, "Cliff Coggin"
<clifford@xxxxxxxxxxxxxxxxxxxxxxx> wrote:

>This thread got me wondering how steel bearing balls are made. I can't
>imagine how spheres are routinely ground by the million to fine tolerances
>on radius and surface finish.
>
>Cliff Coggin.
>

This explains all.
http://science.howstuffworks.com/question513.htm
--
Regards,

John Stevenson
Nottingham, England.

Visit the new Model Engineering adverts page at:-
http://www.homeworkshop.org.uk/
.

Relevant Pages

  • Re: Plasic balls
    ... imagine how spheres are routinely ground by the million to fine tolerances ... on radius and surface finish. ...
    (uk.rec.models.engineering)
  • Re: image generation in C++
    ... a set of layered spheres. ... the center of the grains, its radii and the colors of each layers. ... lowest point (center coordinates /plus/ radius). ... Draw all circles, starting with the largest. ...
    (comp.graphics.algorithms)
  • Re: Spark Gap Electrodes?
    ... spheres and toroidal shapes as the capacitive element. ... The larger the radius of curvature the greater the voltage before ...
    (sci.physics)
  • Re: Surface accuracy and curvature
    ... tolerances are because the statement that a radius of curvature can ... lens manufacturer to make a radius to X mm +/-160nm is as unreasonable ... tolerance on radius of curvature. ... manufacturing spherical surfaces to within a few hundred nanometers ...
    (sci.optics)
  • Re: A Possible Mechanism For Gravity Without Forces Acting at a Distance
    ... >the "real" radius over time that avoids this problem, ... comparing spheres all of the same density, ... things like surface gravity to be a constant. ...
    (sci.physics.relativity)