Naturally. I'm not disparaging that there might be limitations and/or exceptions. I was highlighting that as general practice, we've gotten pretty ok at pressing bearings.
I'm not a materials scientist, but I don't think the loads exerted on bearings used for high performance parts will compare to a human powered bicycle. I can grasp the limitations and in a sense, the flexibility of the material in comparison to say...an alloy shell, but I'm being quite general.
Most of the complaints regarding press fit creaking I've actually experienced were on aluminium frames rather than carbon, which surprises me as I'd have thought we have got pretty good at machining or casting to high tolerances.
I don't think it's the flexibility of the carbon BB shell that's an issue, more the difficulties in getting tight press-fit tolerances in something that's moulded rather than machined. For ali frames which can have the BB shell machined after welding there's no excuses.
Yeah I can see the issue with that for sure. Only as good as your carbon forming techniques are. it does explain certain manufacturers moulding frames around Alu BB shells.
It was always the Alu frames that creaked though. I rarely remember a carbon one doing so.
Naturally. I'm not disparaging that there might be limitations and/or exceptions. I was highlighting that as general practice, we've gotten pretty ok at pressing bearings.
I'm not a materials scientist, but I don't think the loads exerted on bearings used for high performance parts will compare to a human powered bicycle. I can grasp the limitations and in a sense, the flexibility of the material in comparison to say...an alloy shell, but I'm being quite general.
Most of the complaints regarding press fit creaking I've actually experienced were on aluminium frames rather than carbon, which surprises me as I'd have thought we have got pretty good at machining or casting to high tolerances.