English Dictionary

tommy bar

noun

A short bar put through the hole in a socket spanner or box spanner to provide leverage.

I used a tommy bar to loosen the bolt.

意味（1）

A short bar put through the hole in a socket spanner or box spanner to provide leverage.

意味（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.