Large sizes in mechanical engineering mean dimensions in excess of 500 mm.
Besides various measurement procedures like those that apply large internal or external
micrometers with two-point contact, tape rules (wrapping round the outside diameter),
V-bases, rotating measuring disks (rolling-contact) and optical systems (triangulation
with theodolites), resort is often to make use of simple testing means like fixed gauges
(inside calliper gauges), gauge blocks combinations or telescopic adjustable gauges.
