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Vendor & GroupBuy items for sale VW TDI/Diesel related items for sale by vendors and Groupbuys. The only commercial posts to these forums are that of Vendors with TDI related equipment. To start a post, you must be a Registered Vendor. You may periodically post a note about products you may have for sale/services so long you indicate clearly you are from the company selling these products/services. The right to discontinue this practice & remove excessive posts remains with the operators of TDIClub. Please note there is also a webpage of TDI Vendors" Group-buys are permited if sponsored by a registered vendor.

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Old March 30th, 2016, 19:13   #16
Fix_Until_Broke
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In my experience, Machining cost is about a wash:

NPT = Pre-drill to minor thread diameter then tap - Tapping has to be done carefully as it's a tapered tap. Can't go too deep or too shallow or the mating fitting won't work
SAE = Pre-drill (less than thread minor diameter) then form tool then tap. All are high speed operations

You can get SAE form tools that will drill the rough hole, pre-drill all in one, but they're generally expensive compared to the additional machine time. He's not likely constrained by the machining time anyway.

The NPT tapping/inspection process is also much more controlled/involved than a straight thread port so that end of it typically cancels out any machining time advantage.

All of this may be irrelevant depending on how evguy1 has his process setup.

Fittings/adapters are a negligible cost difference - Can't seem to find the quotes now but they're within a few pennies on a fitting that is less than $2.00 regardless if you're going NPT to JIC, NPT to ORS, SAE to ORS, SAE to JIC, etc
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Old July 24th, 2019, 22:14   #17
tims944
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PM sent to you ev guy
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Old July 25th, 2019, 06:34   #18
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This is an old thread. I did change to ORB threads in these plates back in early 2017 along with a few other minor changes.


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Old July 27th, 2019, 06:33   #19
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Pm sent to you ev guy, I know this thread is old.


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