Now I've seen a photo there's an easy answer to this without takeing them fully apart, those are RS2 front hubs fitted to S2 or CQ (doesn't matter) rear bearing carriers.
RS2 rear hubs look quite different due the handbrake set up, so there's one question answered.
So something has been adapted to make them fit, two options... A. Machine out the bearing carrier to accept front wheel bearings. Or B. Machine down the hub's spindle to fit stock S2 rear wheel bearings. I don't see any other sane ways of doing it.
The second option is the more likely as hubs fit in a lathe quickly, easily and safely. It wouldn't be that much bother at all even for an operator with basic skills to get right. Where as the hub would really have to be CNC machined out on a mill, quite doable but much more expensive and complicated than option A.
It is possible to machine the bearing carriers on a lathe but theres very little for the jaws to bite on making it extreamly hard to set the runout with a a dial gauge and get a decent grip making the possiblity of balls it up much, much higher. Would also have to be done very slowly unlike quickly turning down a hubs spindle which would take about 1/2 an hour each, including set up time using a decent cutting tool as they're very hard.
The bearing carrier is much softer being cast iron but I wouldn't want to be stood near it spinning fast, anything faster than 100rpm would be asking for death should it come loose, so very slow cutting speed and as I've mentioned very difficult to set up unlike something that's round.
So you just need to measure the inside diameter of the inner bearing race to see which way it's been done. I think unless I've missed something obvious, am happy to proven wrong but thats the way I'd look at and I use both machines.
RS2 rear hubs look quite different due the handbrake set up, so there's one question answered.
So something has been adapted to make them fit, two options... A. Machine out the bearing carrier to accept front wheel bearings. Or B. Machine down the hub's spindle to fit stock S2 rear wheel bearings. I don't see any other sane ways of doing it.
The second option is the more likely as hubs fit in a lathe quickly, easily and safely. It wouldn't be that much bother at all even for an operator with basic skills to get right. Where as the hub would really have to be CNC machined out on a mill, quite doable but much more expensive and complicated than option A.
It is possible to machine the bearing carriers on a lathe but theres very little for the jaws to bite on making it extreamly hard to set the runout with a a dial gauge and get a decent grip making the possiblity of balls it up much, much higher. Would also have to be done very slowly unlike quickly turning down a hubs spindle which would take about 1/2 an hour each, including set up time using a decent cutting tool as they're very hard.
The bearing carrier is much softer being cast iron but I wouldn't want to be stood near it spinning fast, anything faster than 100rpm would be asking for death should it come loose, so very slow cutting speed and as I've mentioned very difficult to set up unlike something that's round.
So you just need to measure the inside diameter of the inner bearing race to see which way it's been done. I think unless I've missed something obvious, am happy to proven wrong but thats the way I'd look at and I use both machines.
Anyhoo peeps good news is the new bearings fit so the mystery is solved RS2 front bearings coupe rear
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