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Wiktionary

tommy bar

Archived revision by Quercus solaris (talk | contribs) as of 23:17, 23 April 2021.

English

 
T-handle wrench with integral tommy bar as the handle; socket and extension are attached

Noun

tommy bar (plural tommy bars)

  1. (engineering, machining) A cylindrical iron or steel bar used as a lever; thus:
    1. A short bar put through the hole in a socket spanner or box spanner to provide leverage.
    2. A bar used to loosen or tighten some types of chucks and tool holders on machine tools such as lathes or milling machines.
      A set of two tommy bars is the standard tooling for the spindle nose threads of some minilathes and minimills.

See also

  • (tool containing an integral tommy bar): T-handle
  • (tool involving an analogous male cylindrical portion): pin spanner
  • (hooked bars, differentiated from tommy bars): crowbar, jimmy

Translations

Further reading

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