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Can we get the thread cutting (thread milling and turn threads) dimmentions to be changed. currently it asks for some wierd numbers. Can we instead just enter the major diameter, Minior diameter and thread pitch?
The tool suppliers give you the thread depth for your insert and not the minor diameter for outside thread. Also why would you want to give in the Major diameter if that is just your models diameter?
I actually think giving in diameters lead to more mistakes.
I do admit that it's weird that the thread milling asks for a diameter offset. And not a thread depth.
I have no comment in regards to the turning application, as that's not my field of expertise. However, the milling side I full support. Let me input the diameter and pitch, end of story. Don't make me do mental math or pull out a calculator to figure out the offset, or even the thread depth (that's just as weird, sorry)
Yes, there is a calculation you can do to determine the theoretical thread depth. However;
The machinist on the floor is likely going to be looking for hard values, ie diameter. Especially if it's threading to an undercut. The programming method should reflect that value while not relying solely on a calculation of thread depth.
I have a strong dislike/aversion to of "in theory" processes.
More importantly, I'm looking more so at internal thread milling. Yes I know the minor, I just drilled it out. Yes I know the major, it's the basic thread size. I would state that internal threadmilling most likely comprises the large majority of milling operations, whereas OD and ID would be evenly split amongst the turning operations
My experience with MasterCam and Esprit is what I can compare to. It was slick and easy to input
Of course, a decent solution would be with a toggle. Toggle on and you enter depth of thread. Toggle off and you enter major diamter for internal, minor diameter for external
Side note, and question for you Laurens; Is the Machinist Handbook an American standard of machining info, or does something like that go global?
I understand your point but I get the thread depth with the info of the tool. Where as I would need to look up the internal diameter of a outside thread for example. So for me it's the other way around in the feel what is easy to have on hand.
I've only heard of the Machinist Handbook here on the forum. So no it's not really something I've ever seen here. Apart for things being in the imperial system are pretty hard to read for us here. Most of us have no feel for the numbers so to speak.(Yes most of those books will be text but if any example will be hard to understand)
But having an option to toggle this idea on the milling side sounds good.
The Machinist Handbook was an example, I was more wondering if your side of the world had standardized resource info.
I totally get what you mean about the numbers meaning almost nothing to you. Many people I work with feel the same about Metric. I've been in both worlds so long it almost comes naturally to me
I'm curious what tooling supplier you use that includes the info needed. For a lot of what I do, it's general purpose tooling with a large range of thread size coverage, more so with internals of course, but also in the external threading side.
While I totally get what both of you are referring to and while I agree there maybe an adjustment to the parameters/definition for thread milling.
Initially when thread milling introduced and I needed to figure out what was needed for the "Pitch Diameter Offset" field , it wasn't that intuitive but what I have found in years of using the treadmill strategy is that it actually make a lot of sense given that you are dealing with root and crest diameters particularly with class threads. If you have thread depth and either OD / ID information it is pretty easy to derive the diametrical difference which is the "Pith Diameter Offset".
I know in SolidWorks depending on whether the hole or boss is modeled with threads removed or not play a key role on whether this parameter needs to be used at all and the strategy does not know the difference or what your intent is based on a cylindrical or conical face selected as drive geometry.
Personally I prefer threaded holes to be models threads removed and boss to opposite. So In these cases, what would you do??
This has the potential to appear as a feature, but slightly different from shown in this idea. It would likely have all of the thread sizes built-in, and further fine adjustment could be made in the operation. This would be used in thread milling as well.
