Very OT - Shrader Valve production
Turbo Mini Forums

Evening all,

I have a strange request! I am trying to produce a standard Shrader Valve for an engineering project i'm working on, but trying to locate the necessary taps/die for the job! I understand it is a special thread and from what I can find online, the internal thread is 0.209" x 36tpi UNS and the external is 0.302" x 32tpi UNS.

My request is, anyone know where I could source the taps/die, or even better, anyone have some they wouldn't mind selling on? I have ordered one of the 4 in 1 tools for restoring threads but I don't hold much hope for that to be honest..

Thanks!

Try Wiseman,

http://www.threadtools.com/

at work we use a few special unc thread taps and dies for electrical stuff and Wiseman have always seemed to cary them in stock, cheap too, fiver for a 3/8 UNEF (extra fine 32tpi) tap

Cheers Joe, i've just emailed them, fingers crossed they have something, i've stripped the rubber off one and if the worst comes to it, i'll try to cut a thread on that or something...

Ive got a few new scrader assy's if you need a couple more,

No worries but thanks for the offer all the same! I bought 4 off ebay earlier for the grand price of £1.44, which should be enough for various trials..I have a few months to work on it so there is no rush, plenty of paperwork to go with it :(

I had a few hundred of these made a couple of months back for a prototype TPMS system. I used a standard Schrader valve insert.




The internal thread was 0.209"x 36TPI
The cap thread was 0.305" x 32 TPI

Valve fits a treat but make sure they retap them after anodising.

1972 998 TURBO SLEEPER

Could you not just buy a steel or alloy bolt in valve and modify that to suit?

Not sure if you were talking to me Tom but it wasnt practical for the application

1972 998 TURBO SLEEPER

Sorry no, I was suggesting it to the OP.

Longy - It's just for a prototype part, it's not going to really be used or anything to I should be fine, I may make the part out of brass and leave it bare or something along them lines.

Tom - Thanks for the suggestion, I didn't actually know they made them, just found some on Camskill so may shop around and order a couple and see, but I will try the shrader first to see if I can cut it M6 and essentially make that one a bolt in, then just turn a sleeve etc for the application!