It'll work fine with the thermoplastic 3D printing material.
I have inserted nuts before to get a stronger thread, just used a
soldering iron to heat them up.
With something large and thin like a knob, I would recommend to have
cold water nearby so you can set the plastic as soon as the insert is
in place. Otherwise the stored heat will transfer from the metal into
the plastic and possibly deform it on the outside.
I don't see why you couldn't make it a slip fit and epoxy it in.
On Thu, Mar 10, 2016 at 12:11 AM, Nathan Johnson email@example.com
[TekScopes] <TekScopes@yahoogroups.com> wrote:
That would almost surely work with a cast/molded part... The million $ question