OFWW wrote in
:

On Wed, 30 May 2018 19:58:16 -0000 (UTC), Doug Miller
wrote:


3) Even if you can manage to somehow adapt the clamp headstock to the EMT, I very
much doubt that the tailstock will grip it tightly enough for clamping, because the tailstocks
are sized for pipe and EMT is noticeably smaller: actual outside diameters are 1/2" EMT,
0.706"; 1/2" pipe, 0.840; 3/4" EMT, 0.922; 3/4" pipe, 1.050 -- and 1" EMT (1.163") is 10%
larger than 3/4" pipe.


Last I checked the OD of 3/4 pipe was smaller than EMT.

It's the other way around -- I even listed the diameters above. The actual outside diameter
of steel pipe is greater than the actual outside diameter of EMT of the same nominal size, in
all cases.