Thread was cut to a toolbox bolt. Why is thread covered? Part file is attached.
The reason yours isn't working as expected is that you have taper turned on in your helix settings. Uncheck this & all should be as you expect.
For no reason ! it's screwed up !
this is supposed to be
By the way, the thread can't be cut all th way up to the shoulder - needs some cutting tool release
I wish to know the error specifically.
It seems like its the cut extrude is juuuuust coming short of the outer diameter. try raising your sketch slightly above the intersection point.
Cutting profile has a col-linear relation with outer surface of the bolt shaft.
Remove it, dimension the lower point of your profile to keep it's location & extend the upper part of the profile above the shaft of the screw by a small amount as mentioned by Babak Shei. How it is currently is creating ZTG & SW's doesn't know how to show it correctly.
I am unable to understand how this method is appropriate to cut a thread.
To cut this thread standard method is followed. I do not know why end result is incorrect?
Go out to the shop floor and take photograph of standard single point threading tool. Attach the image here.
What do you notice as difference between real world and imaginary digital tool?
Standard method means: Method used in SW to cut a thread.
There are ample information in YouTube, I have seen many. If can find an appropriate one please post that link.
A simple Google search turned (pun intended) up this thread (pun intended).
Single Point Threading - YouTube
Reference around 0:55 setting up the cutting tool.
Through the magic of the internet I have heard that a college degree can be obtained without ever doing anything real.
The previous instructions simply suggest making your digital tool geometry more like the real world tool geometry - extend it beyond the edge of the cylinder that you are cutting so that you do not end up with the zero thickness geometry graphics anomaly.
In this image I edited your cutting tool to look more like the cutting tool shown in the YouTube video link above.
Below is a screenshot showing the profile (in orange) of the "Standard" thread cut you suppressed on the SW toolbox part. As you can see it is clearly extended above the surface of the screw shaft.
Above thread is cut according to this video. It is possible in the video, but not coming to me.
Time around 4.45
There is error in YouTube video as well, just not as obvious.
Have you ever cut a thread in the real world on a lathe with a single point tool?
As noted earlier, you cannot cut a thread that close to a shoulder and in the YouTube video it actually cuts under the fillet which is physically impossible in the real world.
Use the real world experience as your guide, not YouTube fudge.
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