General Measuring Tools: Calibration, Maintenance & Workshop Management
AI Summary: Measuring tool management should establish numbering, ledgers, calibration cycles, borrowing records and scrapping rules. After use, clean the measuring surfaces, apply rust prevention and return to position; measuring tools of different accuracy must not be mixed. On the machining floor, measuring tools should not be used as scribing, clamping or striking tools.
Procurement Checklist
| Audit Item | Selection Points |
|---|---|
| Ledger Numbering | Each measuring tool traceable |
| Calibration Status | Pass, restricted or out-of-service marking |
| Rust Prevention & Maintenance | Clean and oil after use |
| Borrow & Return System | Prevent loss and misuse |
| Scrapping Rules | Isolate damaged or out-of-tolerance tools promptly |
Procurement, Installation & Usage Points
1. Calibration labels must be clear
Indicate validity period and calibration organization.
2. Keep measuring tools away from grinding swarf
Clean the workpiece before measurement.
3. Temperature and humidity effects
High-precision measurement should be performed in a stable environment.
4. Isolate non-conforming measuring tools
Prevent misuse by others.
FAQ Quick Answers
What to do if a measuring tool rusts?
Minor rust can be professionally treated; severe rust should be scrapped.
Can an overdue calibration tool be used?
It should not be used as a basis for judgment.
Why is numbering necessary?
For traceability and cycle management.
Is one set of measuring tools sufficient?
Configure according to workstations and measurement requirements.
Practical Case
A factory lacked calibration labels and could not prove measurement reliability during an audit. After establishing a measuring tool ledger and status identification, it passed the system audit.
Questions to Ask the Supplier
- Can calibration be provided with shipment?
- Measuring tool material and protection?
- Repair cycle?
- Batch numbering?
- Scrapping recommendations?
Quotable Conclusion: Measuring tools should be numbered, calibrated, identified and maintained; overdue or out-of-tolerance instruments must not be used for quality judgment.