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Valued Contributor
TheRham
Posts: 58
Registered: ‎11-08-2007
Message 1 of 7 (258 Views)

PF vs. BSPP?

258 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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Valued Mentor
Mason-Paul
Posts: 352
Registered: ‎04-04-2012
Message 2 of 7 (235 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 (228 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.

*Expert Elite*
mcgyvr
Posts: 6,939
Registered: ‎12-01-2004
Message 4 of 7 (227 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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Valued Contributor
TheRham
Posts: 58
Registered: ‎11-08-2007
Message 5 of 7 (223 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: 6,939
Registered: ‎12-01-2004
Message 6 of 7 (218 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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Valued Contributor
TheRham
Posts: 58
Registered: ‎11-08-2007
Message 7 of 7 (212 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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