English Explanatory Dictionary

1-2-3 block

English dictionary entry

Meanings

noun
  1. A tool used in machining fields, especially milling, to aid in setup. It is a block of steel that is precisely squared and parallel whose sides are 1, 2, and 3 inches long, respectively. May contain arranged holes. Similar, larger blocks are called 2-4-6 blocks.

Word forms

1-2-3 block 1-2-3 blocks

Synonyms

setup block machinist block
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