In message , The Natural Philosopher
writes
On 25/03/17 10:44, Tim Lamb wrote:
Bosch drive motor failure on spin function. Failed to reach full speed
and then tripped out the house RCD.

Google seems to imply this is terminal for the motor. On examination the
carbon brushes have worn to the point where the copper inserts have
marked the commutator.

Set of brushes are cheap enough but replacing the motor at 175-200ukp
seems poor economics.

Any experience?

bought a recon motor some year s back for around 75 exchange when mine
did this.

wasn't brushes. Was a short from a winding to earth on the armature.

75 sounds better:-)

These brushes are badly worn. I wonder if the copper in contact with the
com. leads to excessive arcing.

I've given the com a clean up with emery cloth and raked out the
segments. Thorough blow through with compressed air and I'll see what
new brushes achieve.


--
Tim Lamb