Hi, can anyone help me? I dropped a small washer inside the Crompton
Parkinson 1ph motor on my Myford ML7. I've had a good look around, but I
think I should take the endplate off (opposite end to the pully) to check it
out. Is it as easy as it looks? just undo the endplate through bolts? is
there anything to watch out for, like brushes flying out??
Any help would be appreciated.
Why bother stripping it, unless the washer is precious in some way? The
Myford motor sits horizontally mounted so the washer will just in the end
well and do no harm. The only slight chance of it causing a problem would be
if the motor was vertically mounted and the washer was at the top end, but
even then I doubt much would happen as the rotor clearances are so fine.
Assuming the washer is ferrous, then you could use one of those tiny but
powerful neodymium magnets and some coat hanger wire to fish it out. Works a
treat when you've dropped a bolt into a crankcase ;-)
Depends where it fell. I would never be happy with lumps of loose metal
inside a motor, where vibration could have it thrown up to do damage,
cut through windings or short motor live to ground etc. It only takes
minutes to remove the end cover, so why take chances ?.
Silly question really :-)...
Yes, I think I would feel much better if I strip the motor, there is a small
chance the washer could have fallen out through one of the ventilation
slots, but to be 100% sure a strip would be best.
Would there be anything to look out for? or is really straight forward to
pull the end plate off? I dread something flying out at me which could be
difficult to get back in again.
Another thought has occured to me about the slots on the motor....would they
need a guard over them when using coolant near the chuck ?....a little bit
of perspex do ?....or would it????
Am not familiar with the Myford motors, but most either have studs from
end to end and nuts to hold the covers on, or bolts on the covers into
the centre casting.. Either way, it's usually not a problem to get
apart. At least one of the bearings may be located at both sides with a
plate screwed to the end cover, with the other end bearing spring
preloaded or just floating. If you look through the ventilation holes,
you should be able to see which end has the retained bearing, then undo
bolts and tap or gently prise off the end cover complete with rotor and
opposite end bearing, which is usually just a mild interference fit in
the end cover.
If the bearings don't have dust covers, it's also an opportunity to
inspect the windings and clean / repack the bearings with grease, which
may not have been done since the motor was made.
What's the saying - do the job right once, or do it twice :-)...
I had a problem with stuff getting through those slots many years ago.
My motor has large washer or ring on the end held by screws.
Took the bottom half of a 5 litre (or was it 4?) plastic bottle of square
Slipped over the motor and attached by clamping with the ring.
Air gets out - nothing gets in.
Been like that for many years now.
Many thanks to all who contributed to my little problem with the Myford
motor.....I eventually plucked up the courage to strip the motor in search
of the elusive washer. Strip down was hell of a lot easier than I
thought....no washer found....so I'm satisfied now that all is
well........however, I've tried to wire the motor via flexible
conduit....hole ialready in motor casing for the connector,
great....BUT...when I wired it I noticed that the conduit came out directly
opposite the starter capacitor........when fitting it to the lathe, the
capacitor is now in the way (at the top).....if turn slightly to get it in,
the conduit connector now gets in the way of the motor mounting
bracket...grrrr!.....plus the conduit comes almost upto the lathe bed
(BAD).......only way I can see of wiring it now is to use 4 core + earth
cable from the motor.....that would physically work, but I wanted all cables
to go into flexible conduit...plus the oil ways are in the wrong place (I
tried turning the motor end plate round but internal cables prevent
this).....hope this lot was of interest ...and I obviously have a lot to
Brilliant idea using an elbow, if it's cut a little short and 'cemented'
into place, I can still convert to flexible conduit straight after the elbow
Many thanks for that ! Cheers Peter.
Soon have the lathe up and running now (once I've levelled it and set it up