Lathe Teflon

Turning Teflon: Hanging on by 1/2 inch of
oversize mtl on Length and taking small cuts
to ensure the part does not come out. Teflon
Matl was especially cast for this Job.

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[jackshop]

The teflon was similar to cast, so not perfectly round, both the Inside and outside

diameter must be concentric, thus cut at the same time before removing the tube,

because gear teeth will be put on the outside diameter afterward, so concentricity

is a must. Anyway i got paid for the job that is what matters to me, so the part is good.

[jackshop]

Very interesting, I usually freeze rubber in dry ice to make it cold and harder.

The teflon cut good only thing is, it was cast and i only had 1/2 inch to hold it

in the jaws of the lathe, biggest fear was if it come out of the jaws.

Jack

[jackshop]

Yes, the teflon was cast material and cost $800 dollars a piece, that's why we do it slow and we cannot afford to scrap one of them, Holding it on less tahn 1/2" into the jaws and sticking out 14-15" is long.

It was slow but we got paid for 2 good parts, thats all that counts.

[Mitsugejl]

Is the raw material a cast pipe (dont know the exact english phrase, im from denmark)? Thinking of why the hole isnt alligned with the outer diameter :) I've turned something just like this, some sort of cast pipe, but it was made of PET and also, just like this, wasnt alligned properly :)

[jackshop]

yes it was cast pipe, thats why it cost $800

per piece and i could not afford to lose this part, if it came out of the chuck.

Jack from Eindhoven Holland.

[O1toolsteel]

neat, what is it for?

[jackshop]

It's a gear that rotates, don't know what it

does, I just know there gear teeth on the ends 360 degrees around.

Teflon was $800 dollars.

Not a money maker.

I can send a solid model of it for anyone

that leaves me an e-mail.

[azzy314159]

Could you not have put a roller support (or two) behind the tool. That would make it more secure. Also one can jury rig couple of long bolts to pull the job tight?

[GeneralG1810]

I love machining Teflon, problem is if you stand too close when your finished you look like a cum shot :(

[Serrie1976]

Hey Jack, Sorry to say, but you don't cast Teflon. It starts as powder, in a mold, heat it up, put lots of pressure on it. Wait. Heat up again, following a pattern. Do not heat above 427 degrees C. En als je wilt voorkomen dat je materiaal er af komt... Plak het met loctite 770 primer en secondelijm op een stuk PVC. Voorbeeldje staat op mijn kanaal. Ik heb een poosje in de kunststoffen business gewerkt.

[BuickDoc]

Years ago, I saw a machinist, who had worked on the Manhattan Project, machining Teflon. He cooled the Teflon with liquid N2 to make it harder, so it would cut like a hard plastic. I don't know if it was the same formulation of Teflon that is available today. It was very soft and slick prior to the liquid N2.

[caulk04]

@ryobiguy Whaddya know...I've changed jobs and we use teflon quite a bit. Most of it 1" or smaller dia...some milling on square bar stock as well. It is pretty nice to work with, I don't mind it.

[PimpXXXGuitarist]

@william7040 yup... I have a few years of machining teflon and HSS is always the way to go...