Shorten an NPT tap?

[Eddyde]

Agreed if you have a tapered reamer by means use it, but I'd never buy one

Yeah provably not worth buying one it unless you have a lot of holes to tap or have to meet specifications. I was lucky and got a set of them along with an auction lot I bought years ago.

 

[keeena]

I did end up grinding 3 threads off of my tap and all is well - it let me limit the bore depth to 1/2" deep while still getting to a proper major thread diameter. I also figured out the same thing that RJ suggested: keep 2 taps on hand: one modified and one OEM length.

I haven't tried them yet, but I did order an interrupted thread tap to give that a try. It has nothing to do with solving my problem, but I hear they tap easier.

 

[Firstram]

Interrupted taps are like magic!

 

[Weldingrod1]

What you are looking for is a "short projection tap". McMaster has them. It's what you need for tapping the branch of a tee.

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[Firstram]

What you are looking for is a "short projection tap". McMaster has them. It's what you need for tapping the branch of a tee.

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Awesome!!

 

[keeena]

What you are looking for is a "short projection tap". McMaster has them. It's what you need for tapping the branch of a tee.

Thanks so much; had no idea such thing existed.