I have a specific job in mind, but possibly this is a general question...

I need to determine the location of a number of holes in a (transmission) mounting face so I can make up some adapters/spacers for mounting it to a different engine.
There might be some pattern/s to the holes, but its definitely not obvious so I'm starting by assuming there isn't one.

For a one-off part the easiest way is probably to just locate them in the new part using transfer punches etc, but I'm likely to need more than one and would rather spend the time up front to get accurate locations and draw it up properly.

To give some context:
- Number of holes: roughly 5-15
- Size of holes/fasteners: 6-12mm
- locations to be within say +/- 0.20mm
- Combination of through, blind, threaded and plain holes
- Part size: would fit inside 400x400 envelope
- Parts are easily handled manually and placed on a surface plate or machine table for measurement if required.

Best idea I've come up with so far is using a mill with DRO and some form of hole locator - but interested in how you experienced blokes would approach the task?

Steve


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