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Forum seems to have eaten my previous attempt to post this.
Hope PF46 bottom bracket with the 24mm axle / the two halves that thread together.
Properly installed in frame with the proper Hope tool. No obvious issues with alignment (XT cranks slide straight in).
Non-drive side bearing is running a bit rough (with no load on it) when installed in the frame and clicking under load.
When not in the frame the NDS bearing is smoother than a greased weasel with a smoking jacket and a taste for jazz.
Anyone got any bright ideas?
I have not installed the bearing by swinging on spanners, just gently snugged in like I'd do with a hub. The centre sleeve bit that holds the cups together is pretty tight.
The only (somewhat improbable) ideas I came up with were (1) fractionally oversized bearing and (2) slightly out of shape bearing seat in the cup.
Pretty common if the BB shell ID is too small.
I would measure the BB shell ID and ream if required. You can also measure the BB cup OD, ID and bearing OD and see where the issue is if you can do so accurately.
Park do a 45.94mm reamer for PF30 frames
Thanks.
It occurred to me it could be a rogue bearing but i guess even a smidge too much anodising on the inside of the shell would do the same.
I've emailed Hope to ask them if they have any suggestions also.
Because the Hope bearings sit at least partly outside the frame I think they could potentially have a different bearing OD / BB cup ID to the ones you press straight into the frame. I don't have a micrometer / high accuracy vernier but it gives me an opportunity for a new tool!
GF had a click from her Yeti SB5 that I have been chasing for weeks. Latest thing I tried (working through a long process of elimination) was replacing the DS bearing on her Hope PF46 and click stopped... old bearing felt fine so unsure if that was cause but not caring.
Clicking is rarely (pretty much never) bearings themselves, albeith replacing/reinstalling often resolves it.
Roughness here much be caused by the bearing cup being deformed slightly when inserted into the BB shell Shirley?
@cynic-al are you suggesting the cup itself has been a bit distorted on the way in?
In which case I wonder if I've given the screw in sleeve a bit too much welly.
If that's the case I suppose I'll have to get the blasted thing out.