Ignoramus11290 wrote:
No, nothing happened, I just want to know a little more.

What happens if I make a wrong instruction and, say, crash a spindle
into a vise. What would happen in reality? It is somewhere in the
range between "nothing special" and "explode in a giant fireball". So,
in reality, what happens if I crash a running spindle into a vise or
something of that sort. Would the mill be ruined permanently?

The overload clutch on the Bridgeport Series I power feed is supposed to
be set at 200 Lbs.
I took that as a guide, and designed my Z axis to be fairly weak so it
would stall around there.
I have plunged into a vise jaw once. Since it was hardened, it just
left a polished ring on the jaw, and did bad things to the cutting edges
of the end mill.

The X and Y axes are quite a bit stronger. I have broken off a 3/8" end
mill while jogging around and the spindle wasn't running.
3/8 and 1/2" cutters will probably fail without doing serious damage to
the spindle bearings. If you have a really solid crash with a larger
tool in the spindle, it could damage the spindle bearings, the QC socket
or maybe bend the spindle.

The Bridgeport is pretty tough, so a minor crash with modest tooling
will just break the cutter.
You may have flying debris in that case.

Jon