In article ,
Jules Richardson wrote:
All electric motors have easily changed bearings? Think you need to get
out more. Besides, when a bearing fails, damage may not be restricted
to the bearing itself.

Tripe! Bearings on large auto electric motors can be quicke replace
units.

Well, the bearing at the shaft end will require at least sliding the
motor out of the way, if not hauling it out of the vehicle entirely. Not
quite as much faff as hauling an IC engine out to change a clutch plate
(say), but I don't think it's at the trivial end of the scale, either.

Plus if a bearing fails in a major way, other damage may well be caused.
The more dribble dribbles, the more it becomes obvious he has no practical
experience of anything he dribbles about.

You missed the fact that bearing failure is most unusual on a modern
engine?

It isn't. Also they loosen off and become noisy and create vibration.

I think outright failure's pretty rare (barring issues with oil
starvation); a vehicle will typically end up scrapped for other reasons
before then.

Quite. But, of course, few electric cars will cover the mileage heavily
used IC engines ones do. They simply ain't suitable for long distance use
and probably never will be. Most will give up on them after the first long
journey and use the train in future.



Agree about the noise though, although they seem to last
well enough even after they've hit that point (unlike poxy wheel hub
bearings, bah!)

These all in one units so common these days do seem to have a short life.
I've had several cars with the old adjustable taper bearings that got
scrapped without them ever being replaced.

--
*If I throw a stick, will you leave?

Dave Plowman London SW
To e-mail, change noise into sound.