A friend has asked if i can make an 8mm-10mm tapered threaded bar of 50 mm long
it needs to be normal 1.5mm pitch

god knows why, but i said yes, i would have a go

now i think, err were do i start !!!



[Edited on 5/10/11 by steve m]

so you want to make a 50mm long threaded bar , but do you want it 6mm, 8mm or 10mm thread ?

you seem to quote all 3 in your post ??

apologies if its just me being thick !

Ray

I actually want it tapered from 8- 10 mm

for some reason (fosters!) i put 6mm in the header !

Turn the taper then cut the thread.
Of course if you ain't got a lathe, you is knackered.
Then again you could pay Flak to do it. Sorted.

[Edited on 5/10/11 by Confused but excited.]

You'll need to mount it between centres with the tailstock offset. Drive the other end off a dog and cut the taper and follow it with a thread tool.

Thanks for the replies, but as i seem to have mislaid my lathe!!
I will conceed, and say i failed,

Im more intriged to know why he wants it?????

quote:

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Originally posted by steve m
Im more intriged to know why he wants it?????

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More of a challenge when he asks you to make the tapered nut to fit it - lol

When you ask him what its for don't forget to tell us too.

If it was really important I could do that for you. I have a CNC lathe. That said...what an effort. Taper threads are usually very short - why so long?