On 9/3/09, David Nereson <da88ve at gmail.com> wrote: > ----- Original Message ----- > From: "Jack Reisland" <reislandj001 at hawaii.rr.com> >> 1/8" tapered pipe thread is based on the plumbing industry >> standard that has no reference to the actual dimension of the >> pipe. For example, an 1/8" pipe is actually 13/32" outside >> diameter. I have no idea why they use these standards. Pipe size goes by on the _inside_ diameter of the pipe. I imagine that it is easier to estimate capacity that way and therefore quite logical. Tubing size goes by the _outside_ diameter. Usually thin walled enough not to make much difference. The pipe threads are tapered so that they tighten as they are >> screwed together. I fear I need a metal lathe to turn a >> matched tapered thread. >> >> Best Regards, Jack Reisland > Why not a standard pipe die? > --David Nereson, RPT I have both a bottom tap and a die for those threads, since not all threads are cut equal... -- Conrad Hoffsommer, RPT - Keyboard Technician Luther College, 700 College Dr., Decorah, Iowa 52101-1045 1-(563)-387-1204 // Fax 1-(563)-387-1076
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