On 05/08/2020 13:25, Bert Coules wrote:
I'm replacing the motor in an elderly micro lathe with a 24VDC one from
an electric scooter.Â* The power route will be mains switched-mode PSU
switch speed controller motor.

What switch is appropriate here?Â* Is it sufficient to insert a basic
switch into the positive output from the PSU and take the negative
output straight to the speed controller?

You want one rated for the appropriate worst case DC current if it is to
last. That is unlikely to be a problem with most mains rated switches.

DC arc currents tend to be persistent if they occur. AC usually quench.

You may well want the sort of switch you can hit as an emergency stop.

--
Regards,
Martin Brown