Measuring Tolerances

How many micrometres have been made in the UK since 1904 .

As an apprentice a long time ago we were full time at college and were encountering a micrometer for the first time.The material we were supplied with was over size and the drawings were not changed. One of my group (not me) got hold of a micrometer and with all of his force screed the micrometer to get the right dimension reading. 1 broken micrometer. We all have to start somewhere and its not so easy to find help to get started these days.

474,321.

What do you plan to do with that info now?

Thr ting wit de speing is a mis wid de ke dord ,mate.

Dunno!

But why 1904? I'm not convinced that any of the ordinary 'micrometers' made in the UK before M&W started production in the mid-1920s qualify as precision instruments . Accurate micrometers as we have them today were developed in the USA about 1890 and the UK was late in the field. I believe Moore and Wright were subsidised by the government to make precision micrometers, and they got the technology by buying out a Swiss company.

Dave

Take the number of metres made and multiply by 1 million.

I's sure I read somewhere that before Moore & Wright got good at making micrometers they were called Moore and Wrong. In any case, before micrometers they were certainly more wrong than Wright.

(now taking cover)

We don't want any Moore of that.

Genuine Moore and Wrong:

Of course, but it is legitimate to ask the OP for clarification where their terminology is ambiguous.

Otherwise the only genuine reply is silence, and what good would that do?

Asking for clarification is fine, but some posts were getting near mocking the OP.

Neil

My first micrometer, bought in a second hand shop in Dunedin in 1963 for 2 shillings and six pence/Half a Crown. It has no ratchet, no thimble lock, it's a bit better than calipers and a 6" rule, but this was what was advertised in ME at that time and before, and was probably what was used by many modelers.

Ian S C

There is never a daft question, just daft answers!

You need to take the ruler off the job before applying the job to the bench grinder.

Hello Hopper, not guilty. Either Moore or Wrong did it.

FWIW... for some info on tolerances, have a look at ...

http://osp.mans.edu.eg/s-hazem/Mtdr/MTD04-2b.html

George.

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Edited By mechman48 on 04/11/2017 12:31:26

There are Moore like that, yer not Wrong:-

Older and more worn than yours, and perhaps not quite as bad, but the issue's clear to see.

Would never have noticed if your pic hadn't prompted me. I don't usually use the butt of the rule if I can avoid it.

.

From the photos; it looks like M&W have quite good precision on the angular setting of the guillotine ... it's producing consistently bad product. It would be interesting to compare those two angles.

MivhaelG.

I think we all know that it wasn't M&W that made them, just supposedly inspected them to their standards.