Has My BB30 Failed

[Peteaud]

Gung ho fat choy

 

[Peteaud]

You get standard bb30 and pf30 though .

BB30 is a standard, PF30 is a standard, they are not the same. They use the same bearings, 6806. a frame with a PF30 has a 46mm bore for the cup. BB30 has a 42mm bore for a direct fitment.

 

[Apollonius]

Sooo.......If you can get the things apart (never easy with a press fit) would I be right in thinking you can upgrade the bearing with better ones as they are just a standard 30mm id bearing? Such bearings vary in quality.
I ride my Bianchi in all weathers and would expect to have to do some work on a very hard-worked bearing structure.

 

[Peteaud]

Sooo.......If you can get the things apart (never easy with a press fit) would I be right in thinking you can upgrade the bearing with better ones as they are just a standard 30mm id bearing? Such bearings vary in quality.
I ride my Bianchi in all weathers and would expect to have to do some work on a very hard-worked bearing structure.

You can buy cheap tools for doing it.

IMHO, buy a decent quality bearing, double check them for grease and take care pressing them in to get them in true.

If you google 6806 bearings, these are the ones used in BB30 & PF30. the 2RS means double seals.

i.e

http://www.wychbearings.co.uk/6806-2rs-max_enduro_bearing.html

 

[Drago]

Moving the bearing further outward in terms of radius makes room for a bigger and stiffer, yet potentially thinner walled an lighter spindle.

The downside is that it moves the bearings more towards outboard as well into the line of fire from crud, and the bearings themselves a smaller.

I would contend that the design limits imposed by the standard dimensions make for a short bearing life, and the standard is already renowned form this, even with high-quality bearings. It's also a little pointless, as a fat heiffer like me will flex the frame - and visibly so at that - before something like an Octalink spindle will flex

They're an answer to a question no one had asked.

 

[Apollonius]

Excellent information. I am very grateful to you.

 

[derrick]

We have just had a bike replaced under warranty, because of a bb30, the shop could not get it to stop creaking tried all the so called fixes, But fingers crossed this one will be alright, Looking on other Forums a lot of people are excepting this ongoing problem with the bb30, instead of getting onto the dealers and complaining about it, there are different quality bearing out there a mate fitted a ceramic one a few months back so far so good.

 

[andsaw]

Just got back from my ride and have left side r550 pedal and right with r540, 2 thirds in and total silence then it started again but no where as loud, so i will stick the other 540 pedal on and im going to strip the BB and have good look and give some lube on the shaft and check the bearings, if i still get no joy i will update and decide from then on.

 

[User6179]

BB30 is a standard, PF30 is a standard, they are not the same. They use the same bearings, 6806. a frame with a PF30 has a 46mm bore for the cup. BB30 has a 42mm bore for a direct fitment.

That's what I was saying that they are two different standards , point being the original bb30 problem was not with the actual bearings themselves but because the frames had to be spot on to take them , PF30 uses a nylon cup the same as shimano press-fit and should not suffer the same problems as the original bb30.

 

[Smokin Joe]

The downside is that it moves the bearings more towards outboard as well into the line of fire from crud,

How are they more in the line of fire from crud than a standard square taper unit? The only place any dirt can get in is past the axle seals, and they are exposed to the elements in the same manner on all types of system. In fact you could argue that having them further apart make them less vulnerable to the narrow line of fire off the front tyre.

 

[Peteaud]

That's what I was saying that they are two different standards , point being the original bb30 problem was not with the actual bearings themselves but because the frames had to be spot on to take them , PF30 uses a nylon cup the same as shimano press-fit and should not suffer the same problems as the original bb30.

Ok, we are on the same wavelength

I agree, the PF30 system imho is better as it will both provide a better fit due to machining tolerances and also provide better insulation for sound transfere, i.e deadening.

 

[User6179]

Ok, we are on the same wavelength

I agree, the PF30 system imho is better as it will both provide a better fit due to machining tolerances and also provide better insulation for sound transfere, i.e deadening.

Yes