Name: Sizes and tolerances on a drawing
Uploaded: 2026-11-03T08:00:00+08:00
Duration: 48 s
Description: Sizes and tolerances on a drawing: a 48-second captioned video from the KELIBRON 3D measuring lab, with every step written out and a link to try it in the lab.

Sizes and tolerances on a drawing

Sizes and tolerances on a drawing: a 48-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 Sizes and tolerances on a drawing
0:05 Under the reading: the drawing size. Nominal size + each deviation = each limit.
0:12 Upper limit 20.00, lower limit 19.95. This shaft is above 20.00: reject.
0:18 A shaft written ±: one deviation up, one down. Limits 31.95 to 32.05: pass.
0:25 A bore: lower deviation zero, upper positive. Limits 28.00 to 28.05: pass.
0:32 The drawing sets each sign: a shaft can have positive deviations, a hole negative.
0:38 No tolerance written? Use the general tolerance on the drawing, e.g. ISO 2768-m.

In the course

Measurement basics · Sizes and tolerances on a drawing — Read a size and its tolerance from a drawing.

Read the guide

Measurement basicsSizes and tolerances on a drawingA size on a drawing is a nominal size with its limit deviations, written above and below or as ±; each limit is the nominal size plus a deviation.