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morbious1
Posts: 21
Joined: Tue Jun 28, 2022 4:36 am
Model of CNC Machine: Shop Sabre

Threads

Post by morbious1 »

In Aspire, I am machining external threads (using the attached specs), on a wooden post that are precisely what I am trying to achieve except they are extremely sharp.

How can I adjust these settings to remove the sharpness without losing the fit?
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ohiolyons
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Posts: 1701
Joined: Wed May 27, 2009 7:16 pm
Model of CNC Machine: Laguna IQ
Location: Kettering, Ohio

Re: Threads

Post by ohiolyons »

Never cut threads before, but I have played with some of the tutorials a long time ago.

I think you are out of luck, it is my understanding that the shape of threads comes from the bit shape.
John Lyons
CNC in Kettering, Ohio

Jimcad
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Posts: 314
Joined: Sun Feb 20, 2022 12:59 pm
Model of CNC Machine: Alpha CNC 6090 with 4th Axis
Location: Dorset, England

Re: Threads

Post by Jimcad »

I'm an ex turner and used full form threading inserts like the one in the picture.
I remember that thread mill inserts are available and give the full form but never seen them in use.
If you go for them remember to ask for a high top rake angle as I expect that standard rake used for metal will not be sharp enough and will tear.
Let us know how you get on please.
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