MO1L magneto bearing removalUp to Electrical
MO1L magneto bearing removalPosted by George Phillips at February 20. 2017
Re: MO1L magneto bearing removalPosted by jim_hill at February 20. 2017
George, I made up an extractor using the slide hammer principle, are you familiar with that? If so ,the business end comprised a thick walled tube that fitted over the inner race with 4 radially drilled holes , tapped probably 5mm into which I used 5 mm cap screws with the ends filed to a profile to fit into the bearing track, divise a method ofixing a piece of all thread probably 8 mm to the other end of the tube using the slide hammer method ( piece of solid steel with a 8 mm clearance hole ) gently urge the inner race up the mag shaft and " bingo" job done, you will need access to a lathe to make the device, where in UK are you ? Regards. Jim hill.
Re: MO1L magneto bearing removalPosted by jim_hill at February 21. 2017
That's well explained, Jim, but I don't have a lathe. It would also require a set of taps. Do you have a view on heating the bearing and the possible problem of heat transfer to the armature? GeorgeGeorge I wouldn't go down the warming up route if I were you, I did see an alternative option somwhere that involves a vice and some copper rod about .125 diameter. Make a U shape with the copper rod ,it should be sized ti fit in the bearing track, then grip it quite tightly in a vice with reasonable grip on the inside of the jaws,gently tap the drive end shaft with a soft drift between shaft end and hammer, you see where I'm going with this. You will need a third hand ( assistant) to hold onto the armature as if it suddenly gives the chances are it fall on the floor "butter side down" speaking in metaphors.good luck, Jim.
Re: MO1L magneto bearing removalPosted by nicholas_clark at February 21. 2017
Re: MO1L magneto bearing removalPosted by anna jeannette Dixon at February 22. 2017
Hello George I always say where there is a will there is away by using your brains just stop have a cuppa tea and contemplate look that the problem and think about ways around it or the alternatives has the case maybe good luck your doing great yours anna j
Re: MO1L magneto bearing removalPosted by George Phillips at February 22. 2017
I do several hundred mags a year & of course have special pullers bade to remove the inner & outer races.
Jims method can also work well if the race isnt too tight.
The tool you are getting from ebay also works well, but the three perimeter screws can marr the bearing surface, so as long as your replacing the race no worries.
Here are the tools I use:
feel free to contact me directly if you need any further assistance