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BB30 bearings....retaining compound?

  • 15-04-2015 12:59pm
    #1
    Registered Users, Registered Users 2 Posts: 198 ✭✭


    About to overhaul the bike,

    have BB 30 bearings ready to replace old ones,

    some different opinions whether retaining compound is needed, seems to depend on precision of holes in bottom bracket during manufacturing,

    I like to have things to hand in case it's needed when doing a job

    Loctite 609 recommended on various sites for this job, but cannot source it easily..

    Can anyone on here that have replaced similar bearings recommend a retaining compound that is easier sourced,

    Was even thinking would a thread locking compound suffice....


Comments

  • Registered Users, Registered Users 2 Posts: 37 Mellon


    I've never used retaining compound. Take out the old bearings, clean it really well, new grease. The spacers and spring washer is more than enough to keep things in place once the crank is tightened.


  • Registered Users, Registered Users 2 Posts: 198 ✭✭torydiver


    Mellon wrote: »
    I've never used retaining compound. Take out the old bearings, clean it really well, new grease. The spacers and spring washer is more than enough to keep things in place once the crank is tightened.


    Thanks,
    Have new bearings,
    old ones feel rough and knotchy when turning the cranks slowly,
    grease ain't going to cure wear and tear
    just in case New bearings are on loose side when fitting,


  • Registered Users, Registered Users 2 Posts: 1,511 ✭✭✭dave2pvd


    Mellon wrote: »
    I've never used retaining compound. Take out the old bearings, clean it really well, new grease. The spacers and spring washer is more than enough to keep things in place once the crank is tightened.

    Right, and that's why your BB will creak after a few hundred miles.

    Specialized has some good info. It's worth following an assembly procedure if you don't want to be back into the BB again in 3 months.

    http://service.specialized.com/collateral/ownersguide/new/assets/pdf/IG0338_revC.pdf

    In my experience, when threadlocker is recommended, there's a very good reason for it. Just make sure you don't use one that completely locks things up. Also, be cautious with grease - unless called for, don't apply it to threads where you will be tightening to a torque spec. Typically, anti-seize/copper paste is needed in that application.

    Also, Amazon is your friend. If you look carefully, your old bearings have part numbers, like 6902-2RS. Go to Wheels Manufacturing: http://www.amazon.com/s/ref=bl_sr_sporting-goods?ie=UTF8&field-brandtextbin=Wheels+Manufacturing&node=3375251 You might not match the last letters, but look for the first 4 numbers and 'sealed' (not shielded) or 'sealed both sides'. Stay away from ceramic, it's most likely junk.


  • Registered Users, Registered Users 2 Posts: 198 ✭✭torydiver


    dave2pvd wrote: »
    Right, and that's why your BB will creak after a few hundred miles.

    Specialized has some good info. It's worth following an assembly procedure if you don't want to be back into the BB again in 3 months.

    http://service.specialized.com/collateral/ownersguide/new/assets/pdf/IG0338_revC.pdf

    In my experience, when threadlocker is recommended, there's a very good reason for it. Just make sure you don't use one that completely locks things up. Also, be cautious with grease - unless called for, don't apply it to threads where you will be tightening to a torque spec. Typically, anti-seize/copper paste is needed in that application.

    Also, Amazon is your friend. If you look carefully, your old bearings have part numbers, like 6902-2RS. Go to Wheels Manufacturing: http://www.amazon.com/s/ref=bl_sr_sporting-goods?ie=UTF8&field-brandtextbin=Wheels+Manufacturing&node=3375251 You might not match the last letters, but look for the first 4 numbers and 'sealed' (not shielded) or 'sealed both sides'. Stay away from ceramic, it's most likely junk.


    Thanks,
    have the bearings,
    just need to source retaining compound in case it's needed..


  • Registered Users, Registered Users 2 Posts: 37 Mellon


    dave2pvd wrote: »
    Right, and that's why your BB will creak after a few hundred miles.

    Jeez Dave the OP asked for opinions and experience….I haven’t used retaining compound on many of my bikes with plenty mileage on them and none creak…no need to be a sanctimonious pr*** to posters with differing opinions


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