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What I would do is make them to fit the gage, then comp it in 4x the plating thickness. That way after plate, they fit the gage just dandy.
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Need to produce an 3/8-18 NPT external threaded item that will be Zinc Plated .0003 / .0004 " How do I hold my threads ? Do I cut them to accept 2 or 3 turns deep on a standard L1 gage. These will be cut on a Doosan Puma 240MS.
Thanks all.
What I would do is make them to fit the gage, then comp it in 4x the plating thickness. That way after plate, they fit the gage just dandy.
Safe way would be to make some test parts and see how the plate affects them , also depends on how picky your customer is, you usually have +/- 1 turn tol., so at .0003/.0004 plate thickness I doubt it will affect the L1 gage by more than 1/2 turn, but you can determine that on the machine by adjusting the wear offset, cut the part where the gage goes flush then enter another -.0008 X offset and see where the gage goes and make all the parts to that size.
And cross your fingers that your plater holds the thickness to what you need.
I have had a few bad experiences with platers putting on .0005" one time and then one h*ll of a lot more the next time.
An open mind is a virtue...so long as all the common sense has not leaked out.
Hi,
you can use the attached table:
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