Free reference · drawing language
Blueprint Basics
Decode common print callouts before they become scrap.
Diameter
What it means
The dimension applies across a circular feature. ⌀.250 means a quarter-inch diameter.
Always follow the complete drawing: notes, revision block, datum scheme, and general tolerances can change the interpretation.
Next machining layer
Saved setups, program debugging, and guided workflow checks are beta-gated.