A sphere forming and polishing machine

L. Folks, R. Street, G. Warburton, R. C. Woodward

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


A simple system for the production of spheres for magnetic measurement is described. The sphere grinder and polisher produces highly accurate spheres by grinding a rough sphere between three rotating grinding heads using a variety of grinding and polishing media. The system can produce highly accurate spheres with variations of less than 5 mu m from the mean diameter of 5 µm from almost any material, including hard anisotropic materials such as die-upset NdFeB (MQIII). The domain pattern at the pole and equator of a polished sphere of NdFeB is then revealed by Kerr microscopy.

Original languageEnglish (US)
Pages (from-to)779-781
Number of pages3
JournalMeasurement Science and Technology
Issue number7
StatePublished - Jul 1994
Externally publishedYes

ASJC Scopus subject areas

  • Instrumentation
  • Engineering (miscellaneous)
  • Applied Mathematics


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