thread start position
thread start position
(OP)
This may be a ridiculous question, but if you have an M66x1 thread on 2 mating parts, is it possible to specify the start position of the threads on each and hence guarantee the orientation of the screwed together parts?
Please be gentle.
Please be gentle.





RE: thread start position
If you still want to do it, there are two ways..
If you were running production on this part, you would simply need to establish a constant setup. Common for all parts. (i.e. a hard stops to locate the part, automatic feed in from a set distance). Once you have it setup right, it should produce a constant result.
If this is a case of it being a one off part, I would cut the threads like normal. Then adjust it by grinding the contact surface between the 2 parts. This will of course alter the length of the part, but hopefully you have enough tolerance or the overall length doesn’t matter... If the length of the mated part does matter, I would make the thread 1st, see how the parts align at the required torque, and use that for a reference to fabricate the remainder of the part.
I have to admit I have never done this. I would personally not design something this way, because I don’t believe it would be accurate at all. But that doesn’t mean it hasn’t been done, and I could well be wrong about its accuracy.
Regards,
Ross Evans
www.lecmeasurement.com
RE: thread start position
RE: thread start position
RE: thread start position
Scott
RE: thread start position
Fill what's empty. Empty what's full. And scratch where it itches.
RE: thread start position
The torque at which you achieve the desired 'tightness' is subjective and will have to be controlled as stated above.
Good Luck
Quote: "Its not what you know, its who you know" - anybody trying to find a decent job
RE: thread start position
RE: thread start position