Help with a flat thread

[shawn]

Does any one know a G code for a flat thread. Im not sure how to lead in without leaving a groove all the way around the o.d. Our customer is requesting this the only problem is it doesnt run through the entire part. It starts at 1.023 in from the end. They are calling out 7 x .75 pitch. The print looks like it has a straight lead in and lead out of 1.15 witch is called out as a ref. The part is 8 inches long and a diameter of 5.66. They want the thread .330 wide x .242 deep.Any help would be appreciated. Thanks

[mxtras]

Is this really a thread?

It sounds like it could be a lube channel for a bushing perhaps. If you can't start the tool, then how are you EVER going to start a nut or a mating part?

Somethings fishy.

Scott

[shawn]

Yeah its definitly not for a nut because at no point does it reach the end of the part. The part is made of G10 so not sure if it would be a lube channel either. Not really sure, we just got a RFQ and not sure how to do it.

[mxtras]

Clarify with your customer. Just because it is on a print does not mean it's do-able, right? Is this print from a reputable engineer/company?

It never hurts to challenge the designer - he had something in mind when it was designed, but sometimes they do not hesitate to think of how to make the darn thing.

If he gives you crap, then 'no quote' the guy. This can get their attention.

Scott

[miljnor]

I get prints like this all the time! Scott is right these "engineers" don't usually think, "How can this be made?” So I would quiz them, chances are if the don't know the how or why then it will get rejected in the QC process because the QC has a how or why or better yet a mysterious way of checking the part with an even more mysterious check fixture..

[lerman]

Is this intended to be made on a lathe or a milling machine?

Ken

[shawn]

We were originally thinking lathe but im pretty sure I could pull this off on our HAAS VF2 using the 4th axis. I have never had to comp using the fourth axis though. This could get very tricky.

[mxtras]

Is this a onsey-twosey or a production run? Just curious.

Scott

[shawn]

They are requesting only 4 parts. For me its more of a challenge just to learn something new.