Can you identify this machinists tool

[snyder]

Saw this at a friend’s garage today. Can you identify it. I’ve never come across one before.

 

[RTM]

The massive micrometer thing in the back? It is a super precision gage, where each big lump on the shaft is a precise inch apart, then the top knob only adjusts 1” total, add the big lump count to your thousandths of an inch from the top, an a tall precise measurement.

Will see if I can find a part number. Digi check 258

DHG18-E258 DIGI-CHEK Model E258

These gages combine the accuracy of Starrett-Webber Gage Blocks with a precision micrometer head and digital readout. Both over and under heights can be checked directly from the gage blocks in a single setting. Because reference surfaces are provided on the top and bottom of each block...

www.starrett.com

https://www.thefabricator.com/thefabricator/product/testingmeasuring/starrett-digi-check-no-258-series-height-masters-measuring-tool-has-electronic-digital-readout

 

[mrb1]

Cadillac as in Cadillac Gage Company. Several other makers listed...

https://www.ebay.com/shop/cadillac-height-gage?_nkw=cadillac+height+gage


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[Dumber than lumber]

I am going to guess, so don’t laugh at me.
It is something that was very very expensive. And CNC has made it mostly obsolete.
Am I close? What does the label say (besides Starrett)?

 

[snyder]

Thanks all.. your awesome

 

[Firebrick43]

I am going to guess, so don’t laugh at me.
It is something that was very very expensive. And CNC has made it mostly obsolete.
Am I close? What does the label say (besides Starrett)?

Obsolete on the shop floor but not by CNC. The style of the gauges changed and instead of a surface gauge used in conjunction with the gauges they are direct reading now.


Around 1500 dollars for a 24"




About 8500 dollars if you have the air suspension to move it on the surface plate or 7500 without.

The type of height gauge shown by the OP is not usually on the shop floor anymore but is still sold and used by the metrology labs to check other gauges and standards against.



A 610mm (24") is 16,000 dollars

I personally have an old brown and sharp 12” height gauge that lives on my surface plate.