Thanks for the replies.

So I am in a nothing to lose situ, So I think shall strip mine into "scrap" parts and check.

Before I go there would someone answer following, Working outward from the Hex bar centre. Are the "square" bits fixed in any way..
Continuing outward how are the magnetic shoes attached. Are they simply held in place by the cover or are they fixed in place then the cover mounted around them.

What are the magnetic shoes made of.

Ultimately if I can fix the various bits in place do I really need the cover. I cant see why I should.

In the end it may be an exercise in futility, but I guess as stated nothing to lose.

Mike

 

I have decided to give the "strip and weld" idea a go. Lots of things that I dont know about this lump of electrics. Wont be just yet but I'll keep you all up to speed. Boring bit by boring bit. A point comes immediately to mind. I doubt my efforts will be 100% balanced. What guesses about imbalance on such a short moment. I would have thought negligable---however.

Mike

Hi Mike,
            I considered welding the components, but after researching magnet welding changed my mind, its worth a quick google.

Here's where I bought my new rotor: https://www.feked.com/alternator-rotor-magnet-genuine-lucas-rm20-rotor-lu-54202299.html

Best wishes...

 

Hi Bess. Thanks for that.

I agree that it will be "a challenge". I have been giving this more than its fair share of thought and shall experiment with a different idea first. If you wish to get rid of your old one I would be interested cos I dont wish to remove mine at the moment. I'm more interested in keping it all in one piece to get the registration done.

I am thinking more in the Silver Solder route. Yes I saw that one at FEKED.

Mike

Hi Mike,
            You are quite welcome to a rotor, they are nearly 1kg in weight. Do you want me to parcel it up and send it?

Best wishes...

 

Hi Bess.

Yes please. Let me know postage and I'll send it to you.

Question are they solid Zinc other than the obvious innards.

Mike

Hi Mike,
            They are zinc wrapped, you can take your pick.

Best wishes...

 

Hi Bess.

Thanks again. Either is good so I'll take the lighter one if thats OK by you. I'll PM my address

Mike

Hi Mike,
            Its in the post £3.49, can you put the money in an air ambulance charity box?

Regards...

 

Hi Bess.

Thanks again. Yes to the Air Ambulance. Easy for me a friend is a fund raiser for them

Mike

Another top class & helpful post, thanks.
I replaced the rotor on a T120 I was looking after for the absent owner some years ago & was perplexed to find that the new rotor he bought before going abroad was both too big & not round. Fortunately, I was able to skim it carefully on the lathe, as the general advice at the time was to try a new stator.
Could a new plate be used to fix the magnets to the hex without messing up the magnetism? & then all sealed with with cast Mazak or epoxy resin?
In my garage there's a jar of the previously laminated steel plates that used to be in the big electricery bit in a strip light that went on fire. They appear to be very precisely made and far too good to put in the recycling bin, in case they come in handy some time.

 

Hi Bess.

The rotor was delivered this morning. Thanks.

I've done a bit of mejurin and the loose centre boss does not run true at 90^ to the perifery but it's only 0015"at most, so I guess thats wear. Impossible to tell how many times it has "shuttled" to and fro.. Anyway thats just a comment.

My thoughts are this can be done more simply than welding so I have another idea I'll try first.

I'll keep you up to speed here.

Thanks agen

Mike

Hi Mike,
            Good to hear its arrived safely. The history of that rotor is that I bought an engine bottom end and the owner thought the main bearing/bush had issues. On strip down it was the rotor keyway which was oversized. On reflection I wondered if the rotor wear was the cause of the keyway distortion.

Hope you find use for the rotor and maybe come away with a fix.

Best wishes...

 

Hi Gents.

As promised I would keep you psides with my efforts to tighten an A65 alternator. My first intention was to strip it and weld. That was a serious over kill.

The progress has really been mush better than expected and really relatively simple.

Hoefully my pics should be self explanatory but I shall enlarge on it should it be necessary.

I would point out that at this stage i Have only taken out any shuttle movement. It should cure any rotational move ment if not I have a couple of thoughts on that.

Mike

 

Hope this is a better image

Mike