Choose a stable identifier
A short tool number can point to a detailed record without crowding the tool surface. Keep information that changes frequently, such as a next-service date, in a controlled record or replaceable field where appropriate. Decide whether the identifier belongs to the tool body, a replaceable insert or the complete fixture assembly.
Protect the working surfaces
Show the proposed location relative to contact faces, cutting edges, locating features and moving parts. The responsible engineer or tool owner should define where marking is permitted. A permanent mark should not be placed wherever an operator finds free space. For a multi-piece fixture, decide which pieces need individual identities to prevent mismatched replacements.
Make the record usable
After marking, connect the identifier to the correct setup sheet or maintenance record. Test the process with the people who retrieve and use the tool. If two departments use different naming systems, agree on a single reference or a documented mapping. For replacement tooling, define whether the old identifier is retired or retained under an approved rule.