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TheRham
Posts: 58
Registered: ‎11-08-2007
Message 1 of 7 (283 Views)

PF vs. BSPP?

283 Views, 6 Replies
04-05-2012 12:08 PM

Trying to find what (if any) is the difference between PF1/8 (Japanese) threads and G1/8 (BSPP).  Anyone know a whole lot about Japanese threads?

 

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Mason-Paul
Posts: 370
Registered: ‎04-04-2012
Message 2 of 7 (260 Views)

Re: PF vs. BSPP?

04-05-2012 01:01 PM in reply to: TheRham

 probaly just like the BSPP, like evrything else, and gave it ther owne standard name

 

But you can try here http://www.gewinde-normen.de/en/whitworth-pipe-thread.html

 

 

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Valued Contributor
TheRham
Posts: 58
Registered: ‎11-08-2007
Message 3 of 7 (253 Views)

Re: PF vs. BSPP?

04-05-2012 01:06 PM in reply to: TheRham

From what I've been able to find, sounds like it's the same, save for a 30 deg seat.

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mcgyvr
Posts: 7,163
Registered: ‎12-01-2004
Message 4 of 7 (252 Views)

Re: PF vs. BSPP?

04-05-2012 01:06 PM in reply to: TheRham

BSPP/BSPF is equivalent to JIS PF

 

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TheRham
Posts: 58
Registered: ‎11-08-2007
Message 5 of 7 (248 Views)

Re: PF vs. BSPP?

04-05-2012 01:07 PM in reply to: mcgyvr

So, this all begs the question... why is the customer's gauge not matching our threads... something is fishy...

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mcgyvr
Posts: 7,163
Registered: ‎12-01-2004
Message 6 of 7 (243 Views)

Re: PF vs. BSPP?

04-05-2012 01:11 PM in reply to: TheRham

Did you gauge the threads prior to shipment to ensure they were machined properly?

Maybe one is using a tapered gauge?

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TheRham
Posts: 58
Registered: ‎11-08-2007
Message 7 of 7 (237 Views)

Re: PF vs. BSPP?

04-05-2012 01:18 PM in reply to: mcgyvr

Well, not me personally... not my place, really.  But I'm sure they did.  I'm thinking our customer doesn't have the thread (or gauge) they think they have... some kind of oddball JIS variant monster or something.  I REALLY am hoping they aren't using a tapered gauge... funny as it might be.

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