How to Threadmill NPT Threads | WW244

[@EdgePrecision]

You would really need to get a pipe thread plug gauge. They have a flat ground on the gauge that is the hand tight depth. This would be the industry standard of measuring the diameter/depth.

[@MrLiamCooley]

I agreee, for any tapered thread really. You need something that can judge the distance, normally two flats, when hand tight your in between.

[@Juxtaposed1Nmotion]

when E.P. shows up in other Machining CNC channels you know youre either gonna learn something or see something either in the video or in the comment! Antcipating the final OP(s?) on the Nitronix btw! @Edge Precision

[@matthewgowan7546]

I'd love to figure out how to define the diameter of a tapered multi-tooth threadmill. It always seems that when I use the nominal diameter on the threadmill box for programming, I need a ridiculous radius wear offset like -0.5mm to get me between the go, and the no-go on the step limit gauge. It doesn't help that I cut 1/4", and 3/8" with the same threadmill, although when I get it dialed in (both programmed to mid tolerance), they both end up mid tolerance.

[@454Casull]

@@matthewgowan7546 late response but you can just check against a flat surface when it starts to remove dykem, no?

[@bittech1]

That is so unbelievably convenient it hurts, thanks for the upload! Making a pressure gauge manifold fairly soon which has npt threads, this should prove really handy.

[@Te4mUp]

The spreadsheet for NPT taps on your website is different from your video. Under the "CAD Model Dimensions" section instead of a "Hole Depth" my excel sheet shows a "Taper Angle (degrees)". Can we get an updated spreadsheet to match this video?

[@imfbrad]

WHY DOES THE NEW VERSION (9) NOT HAVE THE HOLE DEPTH?????

[@sbeprecisionproducts6729]

Do you need to bore the taper if using a full thread form threadmill?

[@Espressoforge]

Thread milled threads for me come out way way better. I ended up with a multi-flute 1/8 NPT thread mill which has been amazing to use. Pretty quick and doesn't have the problems that an NPT tap into stainless steel seems to occasionally have. I also have to worry way way less about wear of my tap for a production part. NPT thread gauge is a must! Or at least, a sample of fittings, but I ended up with a gauge as it's a lot faster to check production parts.

[@carrigan308]

They leave a little bit of a burr at the entrance of the thread that taps don't seem to, and sometimes you have to run them twice because threadmills are really sensitive to tool pressure, but other than that they are better than a tap in every way.

[@Aletaire]

Yall are doing great work. Thanks for providing these calculators, I love excel/sheets.

[@ciscohernandez4384]

Good job with the video. Just a quick tip, Fusion just released NPT holes. The work you did to model in the tapper is now included in the hole feature of fusion. Just create a hole like you normally would and toggle the NPT thread setting, next to the standard thread setting. It may save you some design time. Thanks for the info once again.

[@alexpinson7759]

Thanks for the heads up! When we made the spreadsheet this wasn't available but it does eliminate the need for the majority of calculations/CAD modeling

[@ciscohernandez4384]

@@alexpinson7759 Not a problem. You guys put out a ton of useful content I learn from. Glad I could return $.02 of the favor

[@Thefreakyfreek]

jes but for some reson it rely undercuts the tread and wont do radius compesationon itnc 530

[@mrmikemanify]

Using a piecewise function on your excel graph would offer a very accurate way of determining tip length.

[@bamboostedgarage9955]

I do see havrey tool sells a specified single form metric thread mill, the question is it possible to threadmill metric threads with a standard size single form thread mill I.E. 1/4 20-56tpi to thread a 6x1.0.

[@CNCVMCTECHNOLOGY]

hello sir, how to calculate x and y first position from centre X0,Y0, in 1/2'' -14 NPT EXTERNAL THREAD , please answer

[@173roberto]

Fusion already added NPT holes to the Hole tool. Have you give it a try?

[@ActiveAtom]

Nice to learn and see some threadmill work neat to watch being cut, and about the calculating app, Lance & Patrick.

[@paulpelletier9422]

.5863 to .5676 = side length of .00935 across .6006 depth gives an angle of .8919 deg. instead of 1.7899, why? been trying to figure out what i should turn id tapers to but can't seem to figure out what numbers to go off of

[@samc5898]

A little above my head, as I don't have a cnc machine lol, but still super interesting. I learn a lot from these.

[@EverScrolls]

What machine are you using to do these projects in? The model number?

[@jon3615]

SensibleGaming tormach 770. But that doesn't really matter, my little taig can do this. I think even a cheap Chinese engraver could do this.

[@brianpackard]

If you are going to the length of the calculations here might as well just extrude the hole with a taper angle.

[@dailybradshaw2]

or not even worry with the tapered hole. it is unnecessary

[@raider1628]

were did you get top hole diameter??

[@dailybradshaw2]

Your top hole diameter is figured by taking your bottom hole and the taper angle.

[@amphib0410]

Can someone explain why the milled hole doesn't have the same 1.78 degree per side taper as NPT threads?

[@paulrizzo7571]

when i program this it work but generates 1800 + lines of code for one operation on one hole. Is this correct? It just seems like a lot of code to me. i.e. it just makes these tiny incremental to create a helical pass. fyi this is an old HAAS. using HAAS pre-ngc in fusion G1 G41 X0.0489 Y-0.018 D25 G3 X0.0669 Y0. Z-0.4094 I0. J0.018 G1 X0.0667 Y0.0062 Z-0.4086 X0.0659 Y0.0123 Z-0.4078 X0.0645 Y0.0184 Z-0.407

[@confedswede]

Love the optical comparator benchmarking, but I own a Harveytools threadmill and that didn't make it into your list. The Harveytools website says their threadmills are ground to a point, so should I just put zero for the flat? Thanks for making life so much easier for all of us!

[@alexpinson7759]

Really just comes down to your fit preference. One or two thou doesn't make a HUGE difference, but you have to remember it's one or two thou on both sides of the hole. If inputting a crest length of 0 gives you a looser thread than you'd like, a larger crest dimension will tighten the fit

[@confedswede]

@@alexpinson7759 Thanks Alex, that clears it up!

[@bcbloc02]

Pipe threads suck, never use them, O-rings for the win!! Nothing wrong with doing what the customer wants though. :-)

[@everettdumas2839]

Could you or anyone share the g-code for the tapered thread operation please? I' struggling with solidworks and BOBCAD. They won't cut the taper. Should I remove the "I" and or "J" values from the code? It's a changing radius from one side of the part to the other. Thanks for any input!

[@dailybradshaw2]

Bobcad is going to struggle with this. There's no need for the taper. All you need is the minor hole. The seal comes from the major threads you create with your threadmill. The tapered hole can cause more seal issues. Some may disagree, but I've found that if it isn't exactly perfect, outside of using Aluminum, it can cause more issues with seal by conflicting with the minor threads. You get your form and seal from the threadmill and it is exact. Hope this helps!

[@Freedom_Synthetics]

Could you design a foward and reverse gear box that would go to a motorcycle engine? Thinking about building a mini sand rail with a cbr 1000 engine, but a foward and reverse gearbox is either $1000+ or nonexistent. Thanks

[@davidjobe9876]

I need the excel calculators file in Metric dimensions please ;)

[@lwilton]

Create a set of cells off to the side or bottom of the sheet in the same arrangement, and in each multiply the original cell by 25.4. Done. You will probably have to order your thread mills and stock from France. :-)

[@swikocki]

Just use the allied maxcut online software. Enter thread details, select a cutter , it then generates the program. Job done - nice and easy.

[@molitovv]

Can you take info from machinery’s handbook and publish it on your website?

[@BaldurNorddahl]

Where did the authors of machinery's handbook get the information from? They did not invent it...

[@molitovv]

Baldur Norddahl you could say that about a lot of books, doesn’t mean they aren’t copy-write protected. It’s a genuine question not a criticism.

[@molitovv]

Baldur Norddahl you could say that about a lot of books, doesn’t mean they aren’t copy-write protected. It’s a genuine question not a criticism.

[@BaldurNorddahl]

@@molitovv The book is of course copyrighthed, but not the information within it. Copyright means that you can not publish an exact copy of the book or pages within. They did not do that. They just used the information to create a derived work (the spreedsheet). That is fully allowed by copyright law. If it was not, the book would not exist either, because the book is also just repeating information that was previously published by others.

[@molitovv]

Baldur Norddahl that is a good explanation, my gut feeling was that the Machinery’s handbook people went to the effort of collating the information. In exchange for your money you get that well collated information. What they have done by putting the information up on the website is taken that information from machinery’s handbook because it is such a useful resource and the easiest place to source this information and used it to provide the same information to others free of charge. It feels like exactly the kind of thing that copyright law should protect against?

[@f250superduty76]

How do you get the top hole diameter. thank you

[@dailybradshaw2]

it is figured from the minor hole and the taper angle of 1.78333

[@OMY-FARM]

How about threadmilling an external NPT?

[@alexpinson7759]

Exact same process, except the loft creates a post instead of a hole. There's an included sheet on the spreadsheet for external just like there is for internal and inputs are all the same

[@CNCVMCTECHNOLOGY]

hello sir, how to calculate x and y first position from centre X0,Y0, in 1/2'' -14 NPT EXTERNAL THREAD , please answe

[@vladanovakovic87]

Very nice video guys, love it 👍 Hope to see some metric thread mill calculator.. Cheers🍻

[@MegaAE12]

I need to convert this Metric for my usage :)

[@EZ_shop]

Good job Alex.

[@prasad123yadav]

What is wrong with nycnc. For drilling a small drill also you use cam????

[@prodesign8189]

You must be a friggin mind reader!! I was looking at fusion360 yesterday and wondering about doing an NPT...decided it wasn't possible. Ordered a die for $14 instead.

[@MiAnalyzer]

Great idea, but too bad users have to pay for the widgets

[@SunTzuLao]

This no longer works, don't waste your time. Hole taper came through fine but fusion ignores it when thread milling with the single point thread mill. 👎

[@dailybradshaw2]

hole taper in npt pipe thread fittings is unnecessary

[@SunTzuLao]

@@dailybradshaw2 unnecessary, but helpful when you're dealing with harsh material no? I needn't have bothered for what I was doing in retrospect, but I remember tapping by hand 1/2" npt into 304, that was nooooo fun lol

[@MrDaniell1234]

Someone needs to watch the whats new videos.

[@Tvorec57]

Красота

[@paulpelletier9422]

.5863 to .5676 = side length of .00935 across .6006 depth gives an angle of .8919 deg. instead of 1.7899, why? been trying to figure out what i should turn id tapers to but can't seem to figure out what numbers to go off of