MW N#933P

[Vince Fletcher]

I Have This Lovely M&W 933p With the Flat Plates I presume For Measuring Paper Thickness Anyone Know if That's Correct.?

[jon_t]

No

[The Natural Philosopher]

more generally used for soft materials

[Fredxx]

"Micrometer 933P Probably used by an inspector to check the diameter of stock materials or components. The large anvils would tend to be required for soft materials such as plastic, fabric or round wire, and sheet materials such as paper, card, etc."

[The Natural Philosopher]

Or gear teeth

[Fredxx]

Please feel free to provide a reference for that purpose. I would be surprised if you do but also impressed.

The usual method of checking gears is with a purpose made micrometer like these:

These have anvil pins/balls of a known diameter.

[jon_t]

I thought the 900 series was an internal micrometer set.

[Fredxx]

I believe it is:

However this seems to confirm the veracity that the 933p is an external micrometer:

[Vince Fletcher]