MetalMonkey
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I got a new 0.55kw single phase motor to replace the 3 phase one from my Viceroy polisher but it’s massive and probably won’t fit.
Is there a Morden motor that doesn’t have a massive fan on the back? The new one’s an IM B3 and it’s a good 80mm longer than the old one of the same power.
You will find not only do they stick out, but they have a different bolt hole on the foot, they are the old imperial B56 frame motor.
They are still available but they are usually a special order and not cheap.
If the old 3 phase motor is serviceable, I think your best bet would be a cheap VFD, it will cost less and you will also gain the variable speed.