Name: Two common mistakes and how to fix them
Uploaded: 2026-11-03T08:00:00+08:00
Duration: 58 s
Description: Two common mistakes and how to fix them: a 58-second captioned video from the KELIBRON 3D measuring lab, with every step written out and a link to try it in the lab.

Two common mistakes and how to fix them

Two common mistakes and how to fix them: a 58-second reenactment recorded in the KELIBRON 3D lab, with English captions. The steps below are the captions in order, and you can do the same measurement yourself in the lab.

What happens in the video

0:00 Two common mistakes and how to fix them
0:05 Measure the bush OD: deep and square.
0:10 Close gently - this reading can be trusted.
0:16 Skew the caliper along the axis: the reading is no longer trustworthy.
0:21 From the side: the jaws span a diagonal, so the measurement is invalid.
0:26 Square it again and re-measure: the reading is back.
0:33 Inside jaws across the diameter: this reading can be trusted.
0:41 Off the centre: the jaws span a chord, so the reading runs small and invalid.
0:46 Back on the diameter: rock gently across and take the maximum.

In the course

Caliper fundamentals · Avoiding common mistakes — Recognise the mistakes that make a reading wrong, and correct them.

Read the guide

Measuring methodsCaliper measurement errors and how to avoid themWrong caliper readings often come from the setup rather than the instrument: an unchecked zero, a tilted caliper, dirt, too much force, parallax or measuring far from the beam.