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5 Morse is ALSO 1.750" at big end. Maybe it is 5 MT?
I have found measuring taper like this is always difficult to do accurately.
If the rough turned taper piece fits the bore, place it on a sine plate, move up the plate until the top surface of the taper is dead even end to end. Now see what is the spacing of the bar to get it level. Jarno is .600" per foot taper, multiply the result of the spacer blocks by 2.4, that should equal .600". If not the taper is not Jarno.
These assumes a 5 inch sine plate and Imperial gage blocks, if metric you know whart to do.
Johnoder,
It is an older gear head Hanya Lathe(a Japanese company that appears to be defunct)- not sure of the year but probably from the mid to late 1950's or early 60's judging from the two photos of other Hanya lathes I found online. The lathe spindle bore has a 41mm (1.61") through hole. I haven't been able to find any documentation on this lathe. It came out of a shop that appeared to use it for spinning and general fabrication of food preparation machinery and cooking implements.
G.
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