"Dave Plowman (News)" writes:

A tip that might help some. Put the tap in your pillar drill. Work square
in its vice. Turn the chuck by hand while applying downwards pressure via
the handle.

Cutting compound is always helpful, too. At a previous place of work it
was Trefolex (green snot).

--
Alan J. Wylie https://www.wylie.me.uk/

Dance like no-one's watching. / Encrypt like everyone is.
Security is inversely proportional to convenience