Inspect or Gauge for a 38.000"-8 ACME-2G Thread

[jzecha]

My company is Machining a 38.000"-8 ACME-2G thread per ASME/ANSI B1.5 and they are trying to figure out the best way to inspect it once complete.

What is the best way to check these threads with it being so large?

Can anyone give me some guidance on how to design/draw up a straight gauge for this as well?

 

[mfgenggear]

OP
How long is it?
Is it in concept or is it done.

Options if the company can machine it it very well should be able to inspect it.

I summieze a Lazer optical equipment.
If a facility has a CMM large enough
Ask a supplier can sell a micrometer large enough to measure 3 w ball check, use grease to retain the balls.

 

[DraftingMan]

jzecha,

You can also check with Gagemaker, looks like they can check it.​

JHD

 

[jzecha]

There is about 2" of thread on a 7' tall weldment.

This is a 38" Diameter disk in the middle of the weldment, so the full Gauge would be pretty big and expensive.

I know they make the following identifiers for smaller threads:
Threads per Inch
Thread Pitch
Thread Identifiers

What I would like is some guidance on how to design my own identifiers for this large thread.
Ive read the spec and can get dimensions, but that is a ton of data and I do not know the exact dimensions I should make the Identifiers or Gauges.

 

[Tmoose]

https://eicac.co.uk/acme-thread-calculator/

over wires

https://www.threadcheck.com/technical-documents/thread-measuring-wire-formulas.pdf