Using Measurement Tools
Lesson 3 of 12 in Quality Control & Inspection · 25 minutes
Learn how to read and use calipers, micrometers, and gauges correctly.
What you'll learn
- Learn how to read calipers and micrometers
- Understand measurement units (mm and inches)
- Record measurements accurately
From the lesson
Accurate measurements are essential in manufacturing. Even a small error can make a part unusable. Quality inspectors and operators use measurement tools every day to check that parts meet specifications.
The most common measurement tool in manufacturing is the caliper. A digital caliper shows the measurement on a screen. It can measure the outside of a part, the inside of a hole, and the depth of a groove. Before using a caliper, always zero it first. Close the jaws completely and press the zero button. This ensures your reading starts at zero.
A micrometer is more accurate than a caliper. It measures to the nearest 0.001 millimetre. That is ten times finer than a caliper. A micrometer is…