Unknown thread standard (italian coffee machine)

It's "IBT" standard. (Italian Bastard Thread)

"Buerste" fired this volley in news:zSj7m.16491 $ snipped-for-privacy@nlpi069.nbdc.sbc.com:

Yeah... they used that standard on Fiats until the late 1990s.

Then they changed everyting over to Quasi-Metric Standard Hungarian Industrial Threads. (Quasi-metric S.H.I.T.)

LLoyd

I have a table originally compiled by Andy Pugh that covers about 520 standard threads in the following thread systems and did not get a hit. Good luck!!:

BA = British association. CEI = Cycle Engineers Institute. ADM = Admiralty. M = ISO Metric. Whit = Whitworth. UNF/UNC = Unified national Fine/Coarse. BSF = British Standard Fine. W.INS = Whitworth Instrument. W.Pipe = Whitworth Pipe Thread Brass = Brass thread. PROG = Progress Thread. BSP = British Standard Pipe Thread. WALTH = Waltham Thread PEND = Watch Pendant Thread. GAS = Gas (Brass Pipe) Thread THURY = Swiss Screw Thread. ASME = ASME Thread. HOLTZ= Holtzapfels Threads. LOEW = Loewenhertz Threads. SPARK = Spark Plug Threads. Elgin = Elgin watch screw threads (L = left hand thread) CROWN = Watch crown threads. BUTTON = Watch button threads COND = Steel conduit thread (DIN 40430)

Buerste wrote:

That means it might be a custom made thread? Thanks for your research Lloyd!! I also have already checked several websites with thread standards and couldn't find anything. But your table seems to include even more standards.

Julius

That means it might be a custom made thread? Thanks for your research Roy!! I also have already checked several websites with thread standards and couldn't find anything. But your table seems to include even more standards.

Julius

--Dollars to donuts some one guy was crankin' out these machines in a shop with a weird lathe and weird feed ratios.

======== While this may not be *THE* answer, it is "A" answer.

During the time period immediatly after WW2 many surplus INCH standard lathes were sent overseas as part of the post-war reconstruction effort.

In many cases the parts these produced were bastard metric/inch as you describe with inch threads but metric diameters/lengths/thread forms, with the inch thread selected as close as possible to the metric size.

Unka' George [George McDuffee]

------------------------------------------- He that will not apply new remedies, must expect new evils: for Time is the greatest innovator: and if Time, of course, alter things to the worse, and wisdom and counsel shall not alter them to the better, what shall be the end?

Francis Bacon (1561-1626), English philosopher, essayist, statesman. Essays, "Of Innovations" (1597-1625).

Yes. Consider BA - used by the Brits for years but actually metric!

Hand-chased by some guy on a treadle lathe? You don't NEED dies or taps to cut threads, they do help to make interchangeable parts, though. If it's got that hand-made, one-off look, it might have been done that way.

Stan

BSPP is fairly common in espresso machines. I imagine you've already checked that? (Sorry, I don't have my Machinery's Handbook at hand)