Dimensional (Mechanical) Calibration is the process of verifying and adjusting the accuracy of instruments that measure physical dimensions such as length, thickness, diameter, flatness, and angles. It ensures that measuring tools and equipment used in manufacturing or quality control deliver precise and traceable measurements in accordance with national or international standards.

📏 Instruments Typically Calibrated:

• Vernier calipers

• Micrometers

• Dial gauges

• Height gauges

• Bore gauges

• Steel rules

• Gauge blocks (slip gauges)

• Angle plates and protractors

• Thread gauges and plug gauges

✅ Purpose of Dimensional Calibration:

• Maintain measurement accuracy

• Comply with ISO standards (e.g., ISO 9001, ISO/IEC 17025)

• Reduce errors in manufacturing and inspection

• Provide traceability to national standards (NABL/NIST)

• Ensure consistency and reliability in product quality