Hole size changes when adding thread

[Anonymous]

I have a male thread on a extruded part , It is modeled , full length, iso metric 48.0mm  designation is M48 by 5  , 6g, right hand .

I created a hole same size through what will be a cap for part .

I then select hole inner face and select thread command but threads show as much finer thread size than extruded part , if I try to set same size threads as the extruded part  the hole resizes to a much smaller size than extruded part , I have checked diameter of both parts and they are the same .

 I made screen cast but it is a useless addition to this in that it must pass the possible porn inspection which is quite possibly being held up by the porn inspector watching too much illegally uploaded porn .

I also pasted a screencast url but that also is being held up in the porn department annalyzation unit in the basement of "Porn Inc / Autodesk /

It is obvious this whole screencast forum is useless as time is of the essence in trying to find an answer to the problem in "Hand " which could be better described if the guys at porn inc could get there hands out of their pants and process my screencast so that i can include it in question , As it is i am still here waiting for approval for my pending non-porn screencast to complete so that i can attach it . I guess while i am waiting and waiting I'll just have to watch some good old fashioned porn myself ,,,,,,,

[JDMather]

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@Anonymous wrote:

...I created a hole same size .. .......

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What is the major diameter of your thread?

What is the minor diameter of your thread?

What is the tap-drill size for your thread?

If you make the hole to the major diameter of the thread - will there be any material to engage the male fastener, or will the male fastener penetrate into the hole without any screwing?

If time is of the essence - can you attach *.f3d file here?

Turn on your sound.

[Anonymous]

Hy JD , I'm somewhat new to fusion and thought that if i matched specs for flask threads ( Described as the extrusion in post , the extruded part is flask throat ) -that it should work , The flasks inner diameter of male thread is 178.152mm  outer dia or flask throat threads is 190.656mm

The cap inner wall diameter for needed thread is 181.486  ( Outer I want larger than 190.656 to accommodate any expansion of flask during heating , it will seal with help of o-ring ,,  I am making it larger so that cap threads on some what loose as flask will be heated and expand .

I just added screencast to post if that helps  Thank You.
Gary Brown

[JDMather]

So why are you attempting to use an M48?

I don't understand the logic?

[Anonymous]

I need to match the thread on flask . I posted screencast , Thread on flask shows as being that size so  i would assume I need matching size but am no expert in threads .

I already did another matching of threads using same method and it worked OK but this time on this one does not work.
If I am wrong in attempting to make at that size please let me know and how to go about correction 
 Thank You.
Gary Brown

[Anonymous]

Thanks , I'll have to try Monday and will let you know results . Your video does show bolt material inserted into hole , Mine is currently set to offset sketch but I will try that way first , if any problems i will then try as described .

[JDMather]

From your image I think you are attempting to use the wrong threadform on your parts.

Compare the threads of similar items that are already on the market and machine screw fastener type threads.

The shape of the threadform is generally much different.

[weshowe]

I have used the thread tool to make threads, and printed them on a 3D printer. 12 mm threads placed in a hole in a knob fit well onto a factory-made handle on my mill (for one example). Smaller thread sizes do not always print well, but that is a 3D printing process limitation.

The hole size changes when you place threads, at least it does when you have the threads modeled. Your old hole is replaced with one that is correct for the thread size specified. IDK if there is any way to create non-standard size threads, but the available sizes pretty much cover everything you are likely to run into, and some that I have never seen.

 - Wes

[JDMather]

I have more than 10 different 3D printers - I've been printing parts since 1999.

The threads on typical plastic and glass bottles do not match machine fastener thread profiles.