[modeleng] Re: coarse threads

Alan,

Try and find a lathe that will cut 27 tpi.  You will have to look at a lot 
of them before you will see one with that number of threads and yet it is a 
very common one.  Where???  On 1/8" pipe fittings, that's where.

Unka Jesse the Tennessee Redneck Machinist


 I am gradually restoring an old lathe I bought a couple of years ago, and
 although lack of time has limited the amount done so far, the other day I
 did clean one part, to find a brass plate detailing changewheels for thread
 cutting.
 The threads listed are: 1,2,3,4,5,6,7,8,9,10.11,12,14,16,18,19,20.28 tpi.
 Some are the usual ones I would have expected, but the others are unusual.
 I was wondering / hoping that the threads might have given a clue to the
 purpose as it appears to have been built for a specific use, although thus
 far it has been impossible to identify the maker thus far.

 Alan Stepney


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