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What is Tap Clearance?

alexcalexc Member Posts: 7 ✭
in Drawings
Hello,

I'm using the Hole tool to produce a Tapped 3/8-24 UNF thread though I'm unclear what is meant by "Tap Clearance" which seems to be defaulting to 3? The item we'll be threading into this hole has 0.75" of thread, so we'd like 1" of thread ideally. How does Tap Clearance affect this?

Thanks

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    NeilCookeNeilCooke Moderator, Onshape Employees Posts: 5,391
    Tap clearance determines the hole depth, so you are specifying the important dimension, thread engagement (tap depth) and a clearance (hole depth past the thread depth) by TPI
    Senior Director, Technical Services, EMEAI
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    alexcalexc Member Posts: 7 ✭
    Ah perfect I see. So with a Tapped Depth of 1" and a Tap Clearance of 3, OnShape calculates the hole depth as 1.125" (with 0.125" being the height of 3 of the threads). Thank you
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