"DoN. Nichols" wrote in message
...
On 2016-12-03, Jim Wilkins wrote:

[ ... ]

Yep. Universal mill (swivel table) and the geared index head
which you mentioned below and I snipped. I think that the term
"Universal mill" was not mentioned, but the rest was.

A modern vertical mill can cut a spiral (helix) without needing a
swiveling table by tilting the head sideways.

--jsw