Exocet BB

keoclassic

Can anybody link me to the correct bb 30 for a planet x Exocet 2 bike that i am currently building.I have purchased a bb 30 crank but i picked up the wrong bb.Now im confused as to which one will do the job.

Thanks guys.

lennymc

afaik bb30 is a standard, so any bb30 bearing and crank should fit. If it doesn't fit then I would guess that it's not a bb30, but instead some other pressfit bearing. What did PX say? what bearing did you buy? what crank did you buy?

http://www.bb30standard.com/

keoclassic

cheers lennymc, just waiting on a reply from them at the moment, i actually picked up a sram press fit bb 30, the bearings of which are encased in a plastic molding but the casing is too large and wont fit.I see that a standard bb30 assembly kit has circlips that seem to fit into a ring inside the shell area to hold the bearings in place ? The crank I bought was a vision trimax tt chainset bb30.

Anyone any ideas?

lennymc

have you a link to the BB?

any bb30 bearings I have seen have been simply a bearing, with the circlips that sit inside the bb shell, and some plastic washers.

keoclassic

I cant post links, but just got this from planet x

"Thank you for your enquiry, currently we really only have the TRiPEAK BB30 & PF30 Bearing Kit available. Please note that BB30 and PF30 are different and you will require a BB30 for a Planet X Exocet II."

I think that the bb you are referring to here lennymc is the correct one that i need to get.

Are they hard to install do you know?

keoclassic

Google sram pf 30 in images and you will see the one i Bought.

lennymc

the pf30 won't do for bb30.

take a look at http://www.bikeradar.com/gear/article/workshop-how-to-service-bb30-press-fit-bottom-brackets-29544/ for installation instructions. If you dont have the tools maybe bring it to a local engineering shop with a press. You can buy tools, and if you are going to change the bb yourself in future then I would advise you get them.

keoclassic

Thanks lennymc, very helpful.

I intend to put it in my self, but i intend to make a jig to tighten both bearings in simultaneously using 2 machined Al cups and a length of m12 threaded bar which will go through the center of the cups with a nut on either end for tightening into place. Was quoted 60E to get it put in by bike shop!! Have always changed my own gxp when it gets knackered but this may be a little more difficult.

Thanks again for the info.

Seweryn

keoclassic wrote: »

Thanks lennymc, very helpful.

I intend to put it in my self, but i intend to make a jig to tighten both bearings in simultaneously using 2 machined Al cups and a length of m12 threaded bar which will go through the center of the cups with a nut on either end for tightening into place. Was quoted 60E to get it put in by bike shop!! Have always changed my own gxp when it gets knackered but this may be a little more difficult.

Thanks again for the info.

Hi,

I have made my own tool for the BB30 bearings installation, as I have been going through them quite a lot until recently, when I put higher quality bearings, which I would very highly recommend (the BB30 bearings sold as FSA or Sram are of very bad quality).
Anyway, if you are anywhere near my location you are welcome to borrow the tool or I can help you with the works. You will also need a medium strength retaining compound to fix the bearings into position, something that the Bikeradar manual does not say about.

lennymc

which bb30 are you using now seweryn? I have had fsa and sram and wasn't impressed.

Seweryn

lennymc wrote: »

which bb30 are you using now seweryn? I have had fsa and sram and wasn't impressed.

The Sram or FSA bearings do not last at all and are waste of time and money, especially in our climate (happened to me a number of times that they had to be replaced after only a month or so). They are the lowest quality bearings you can get.

At the moment I use bearings made by FAG, 61806-2RSR-HLC (they are very good), but the best I found are the NTN bearings with their LLU type seals. In these bearings it is all about how well they are sealed against water ingress.

In fact I actually replaced one of the FAG bearings last Saturday, as it was gone after about 12k km. Installed my old, used NTN bearing back in place, which is still in good condition after being hammered through approximately the same mileage (over 10k km anyway).

keoclassic

Thanks seweryn.

Could you post a pic of what the tool looks like?

Also another question, When you are pressing the bearings into place and have applied your compound ( presumably around the outer casing to the inside?), how do you know when to stop pressing? Is there notable resistance on the tightening tool/press?

Seweryn

keoclassic wrote: »

Thanks seweryn.

Could you post a pic of what the tool looks like?

Sure, here it is. It basically is a threaded bar with nuts and washers plus the installation rings and the knockout tool to get the bearings out of the shell.

keoclassic wrote: »

Also another question, When you are pressing the bearings into place and have applied your compound (presumably around the outer casing to the inside?), how do you know when to stop pressing? Is there notable resistance on the tightening tool/press?

I install each bearing individually rather than both of them together, as they may slip out of the alignment easily (take extra care there, as the bearings must sit in perfectly aligned).
Inside the BB sleeve are bearing stop circular clips in the grooves that the bearings stop against, so when you install each bearing, you will feel the resistance when pressing in.
The retaining compound is an oil like fluid that you apply a thin layer into the sleeve before the installation where the bearings sit in.