On 26/08/16 12:05, fred wrote:
I want to measure the width of a groove which is only about 3.5mm wide and 1-3 mm deep.
Ordinary Mitutoyo calipers with pointed tips are not much good for this application due to the shallow nature of the groove.

Any suggestions ?

use the groove as a female mould for something that won't stick to it,
and measure what you pull out?

Or use feeler gauge plus a bit of something to decide how wide it is and
measure what you pull out again.



--
Religion is regarded by the common people as true, by the wise as
foolish, and by the rulers as useful.

(Seneca the Younger, 65 AD)