Autolycus wrote:

"R D S" wrote in message
...

In message , R D S
writes
"405 TD Estate" wrote in message
...

On 20 Dec, 15:49, "R D S" wrote:
I have a machine with an electric motor in it. We asked a bit too
much
of it
and during a job it laboured and ground to a halt.
Now when we start it up it spins slowly and grinds to a halt
after a few
seconds.
It can be turned manually with ease.

Has something likely burned out within?
Is a repair likely? If so am I looking at a rewinding company?

It is 5.summat amp, 0.6 hp, approx 5 kilo.

It is made by Bodine and spins at approx 20,000rpm.
So it's a "universal" motor, i.e. one with brushes and a commutator, or,
less likely, one fed from a variable frequency power supply.

What's the condition of the brushes and the commutator? Look for any
sign of one or more bars of the commutator having burn marks, or chunks
out of one edge, or being loose or missing. These are all bad news, and
point to an armature fault, but it could just be worn brushes.


Probably is worn brushes.

Burned out windings tend to just get very hot, and spin very slowly, if
at all.

Whereas poor brush contact means it runs..intermittently,and badly.