What is this mic used for?

[Charles RParticipant @charlesr45326]

[Charles RParticipant @charlesr45326]

Can anyone shed light on the purpose of this metric Moore and Wright tool?

Looks like a conventional depth mic but has the scale going in the opposite direction.

[Nicholas FarrParticipant @nicholasfarr14254]

Hi Charles R, could just be a micrometer head fitted to a custom made block which probably fitted to an instrument or machine for setting procedures. Does it have a number on the thimble?

Regards Nick.

[Clive Brown 1Participant @clivebrown1]

Agree with Nick. The standard M&W depth mic. had a rather more shapely block.

[Mike PooleParticipant @mikepoole82104]

The micrometer parts are available for use on custom jigs etc. They are handy to make into a special purpose mic should you ever develop the need for one.

Mike

[Clive FosterParticipant @clivefoster55965]

That style of micrometer head an bock is frequently found on the micrometer adjusted slides / carriers used with optical benches and tables. Usually two counterbored holes to fixt it.

Clive

[Charles RParticipant @charlesr45326]

Posted by Nicholas Farr on 04/08/2020 12:46:53:

Hi Charles R, could just be a micrometer head fitted to a custom made block which probably fitted to an instrument or machine for setting procedures. Does it have a number on the thimble?

Regards Nick.

Hi Nick…think you may well be correct and there's no M&W model number on the thimble.

[Charles RParticipant @charlesr45326]

Posted by Clive Brown 1 on 04/08/2020 13:22:50:

Agree with Nick. The standard M&W depth mic. had a rather more shapely block.

Hi Clive…I thought the same myself about the unshapely block, which incidentally measures (exactly) 1/2" in depth.

[Charles RParticipant @charlesr45326]

Posted by Mike Poole on 04/08/2020 14:00:38:

The micrometer parts are available for use on custom jigs etc. They are handy to make into a special purpose mic should you ever develop the need for one.

Mike

Hi Mike…didn't realise that and thanks for info.

[Charles RParticipant @charlesr45326]

Posted by Clive Foster on 04/08/2020 14:01:28:

That style of micrometer head an bock is frequently found on the micrometer adjusted slides / carriers used with optical benches and tables. Usually two counterbored holes to fixt it.

Clive

Think you may have hit the nail on the head Clive, as there are indeed 2 small counterbored holes in it.

[Charles RParticipant @charlesr45326]

Also, it's different in that it reads in the opposite direction to a normal depth mic, plus it's only graduated to 13mm.

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