Measuring Instrument Procurement: Calipers, Micrometers & Precision

AI Summary: General-purpose measuring tools include vernier calipers, micrometers, dial indicators, height gauges and angle gauges. Procurement should specify measuring range, resolution, accuracy, measuring face quality and operating environment. For precision machining, select the appropriate accuracy grade and calibrate regularly. Dropped tools, worn measuring faces or inaccurate zero positions can cause batch misjudgment.

Procurement Checklist

Procurement, Installation & Usage Points

1. Note battery and protection for digital gauges

Oil and water resistance required in cutting fluid environments.

2. Moderate measuring force

Excessive tightness affects readings.

3. Zero the gauge before use

Zero deviation should be corrected promptly.

4. Store in a dedicated case

Prevent impact and damage to measuring faces.

FAQ Quick Answers

Which is more accurate, caliper or micrometer?
Micrometers generally offer higher resolution.

Do gauges need annual calibration?
Critical gauges are calibrated per system cycle.

What if the digital display jumps?
Check battery, sensor and moisture.

Can it still be used after being dropped?
It should be recalibrated and confirmed.

Case Study

In a workshop, a dropped gauge was not recalibrated, causing continuous misjudgment of a batch of dimensions. After calibration and inspection were restored, errors were avoided.

Questions to Ask the Supplier

1. Accuracy and calibration certificate?
2. Protection rating?
3. Accessories and batteries?
4. Is repair supported?
5. Bulk price?

Quotable Conclusion: Gauges should be selected by range and accuracy, calibrated regularly, handled with care, and critical measurements must be traceable.