Thread dimensioning.

[hatchettpete]

Problem:-designed a 6mm o.d. shaft 25mm long. Used create thread tool to thread end 10mm of shaft. When I dimension the drawing from the design the non threaded saft diameter is now 5.88mm? Any idea what I have done incorrectly?

Thanks

[laughingcreek · Accepted solution]

the thread tool will change the diameter to match what it needs to be for what ever thread size you chose. (you can check this yourself by using a larger or smaller thread size).

you can split the face along the length of your extrude, and apply the thread to one of the faces, the change in diameter will stop at the face split.

[TheCADWhisperer]

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@hatchettpete wrote:

Any idea what I have done incorrectly?

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Nothing done incorrectly.

Attach your *.f3d file here if you can't figure out how to Split Face as suggested by @laughingcreek 

[hatchettpete]

Thanks to the chaps who replied. Splitting the face solved the problem. I am puzzled why this should be necessary as using the thread tool gives the option to specify a threaded distance. It seems the tool sets the whole rod diameter to the mean Thread Major diameter regardless of the desired thread length.