13 years ago
I have a Clark CMD1225 mill/drill which is, I believe, a ZX25 clone
Taiwan. Their current version is the CMD1225C which, I'm told, is made
I'd always assumed that the screw threads were UNC but, when I tried
new 1/2" UNC nuts to the column clamp bolts, they didn't fit. The
measure 12 TPI, i.e. 1/2" Whit pitch (UNC is 13 TPI); so do the 1/2"
cap screws which bolt the column to the base.
Is it common for Taiwanese/Chinese m/c tool manufacturers to use
Whilst on the subject of Whit and UNC (for diameters where the thread
are the same) I've read lots of dire warnings about mixing male and
different thread forms. I'm quite sure that I've occasionally mixed
not noticed any resultant problem but they haven't been precision
torqued to the eyeballs.
Has anyone had known problems when mixing thread forms?