"fred" wrote in message
...
On Saturday, August 27, 2016 at 3:29:09 PM UTC+1, Peter Parry wrote:
On Fri, 26 Aug 2016 04:05:56 -0700 (PDT), 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.

Use a measuring magnifier such as
https://www.emsdiasum.com/microscopy...measuring.aspx

i like the sound of that.

Will investigat further

Many thanks

Yup sure sounds good to me.

Spend £68 on a magnifier

As against gradually reducing a fillet of softwood using a plane and/or sandpaper
until it can be inserted into the slot and measuring the outside of the fillet
with the Mitutoyo* calipers.


michael adams

*It goes without saying of course that Mitutyo calipers are a top of the range item
with prices to match.

Its just a pity that the same can't be said for whatever can be found between the OP's
ears.