What is this mic used for?

This topic has 10 replies, 5 voices, and was last updated 4 August 2020 at 20:35 by Charles R.

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4 August 2020 at 12:20 #19900
Charles R
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@charlesr45326
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4 August 2020 at 12:20 #489136
Charles R
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@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.
4 August 2020 at 12:46 #489142
Nicholas Farr
Participant
@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.
4 August 2020 at 13:22 #489151
Clive Brown 1
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@clivebrown1
Agree with Nick. The standard M&W depth mic. had a rather more shapely block.
4 August 2020 at 14:00 #489165
Mike Poole
Participant
@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
4 August 2020 at 14:01 #489166
Clive Foster
Participant
@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
4 August 2020 at 20:26 #489213
Charles R
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@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.
4 August 2020 at 20:30 #489214
Charles R
Participant
@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.
4 August 2020 at 20:31 #489215
Charles R
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@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.
4 August 2020 at 20:33 #489216
Charles R
Participant
@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.
4 August 2020 at 20:35 #489217
Charles R
Participant
@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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