pipe tap

[Rick46]

Whats the input needed on the tool page when using a N.P.T tap for pipe threads versus a regular tap ?? Im using a 1/4-18 npt looking for the proper input on the parameters tab far as size and threads per inch..thanks,.,..

[Guest]

I define it just like a regular tap.

 

I set the dia of the tool at the size of the fininsh point on the tap. Threads are 18 TPI

 

If you want an accurate display to use in backplot you'll have ato create it as a custom tool.

[Dan Schnars]

I don't think its going to matter as far as the tap goes... as long as you've entered 18 in the threads part of the parameter page... It should pick that up when figuring feed rate... Just double check in the program... You could even change the diameter on the tap in the parameters page to whatever you want and save it to your library as a pipe tap... Does this help?

[Dan Schnars]

What jmparis said...

[Rick46]

size of the finish point ?? would you be refering to the very last threads on the tap.. Im getting about a .550 diameter at the largest point...thanks..

[Guest]

Nope, on an NPT thread gage there is generally a flat where the gage is supposed to go down to for it to be st the proper depth.

 

I measure at that point on the gage.

 

 

The size is not going to be a huge issue though, it'll tap no matter what size you tell it. It only matters slightly if you want your back plot to look reasonably close.

[Rick46]

so it dosent matter the diameter I put in but just the threads per inch...?? I have never tapped pipe threads in master cam before thought I would give it a try but wasnt sure how to set up my tool parameters for the NPT...

[robk]

Just to add a little info to make things a little easier for you. I use .437 Dia. drill for 1/4-18 NPT and go .710 deep with the tap to get the standard plug to sit flush. Just my notes from my operation library. HTH

[Guest]

quote:

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I use .437 Dia. drill for 1/4-18 NPT and go .710 deep with the tap to get the standard plug to sit flush.

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I've got .440 Ø, I don't dare set a depth, too many taps around here that have been ground back for shallower use.

 

[Rick46]

well I just want to go deep enough to get a few threads to start with and finish by hand.. Im just concerned about diameter settings is all.. I will probablly only go about .500 for depth and run the tap by hand down to my needed depth..So Im assuming and diameter will work and then just specify 18 as my threads per inch...

[JCLM]

I agree with John, let the operator adjust the depth. Then they can only blame themselves rather than the programmer(myself).

 

Jeromey

[Guest]

quote:

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Then they can only blame themselves rather than the programmer(myself)

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That is called,

 

plausible deniability

 

[crazy^millman]

If it were me I would Thread mill it and be done with it. I use to do a 440 fitting with a 1/4 turn tolerance and tapping would never do trick to my liking. Once I started threadmilling it life was so nice. I would keep the dpeth for the gauge within a couple thous no problem.

 

JM2C