Grease on press fit BB?

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Husum
Posts: 59
Joined: Fri Feb 17, 2012 9:03 am
Location: Denmark

by Husum

I'm about to put ceramic bearings on my road bike, but I can't seem to get a simple and clear answer on whether to put grease, carbon grease, loctite or absolutely nothing, but wipe the frame and bearings of with isopropyl/alcohol before installation?

Could someone clarify?

Edit: carbonfiber frame with aluminium cups

by Weenie


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stormur
Posts: 1173
Joined: Tue Aug 12, 2014 3:50 pm
Location: FIN

by stormur

As a rule carbon-metal needs retainer ( I use Loctite 648 "green" ) , know shops using threadlockers with big success… . If bb shell is bit to much out of specs than grease works. For carbon fiber any "calcium based" grease is OK, I use red Canada Petro for marine use :) .

In mounting on loctite preperation is a key : acetone, then wipe AGAIN with clean cloth, now : activator, 5 min wait , retainer on both surfaces- press and leave for a while ( look at retainer specs ) .

From my experience BB which cause less troubles with assembly and creaking later on are Rotor brackets. NEVER had any issue with them .
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mr4fox
Posts: 276
Joined: Sat May 15, 2010 2:01 pm

by mr4fox

Im no expert but I just used carbon assembly paste when I pressed in my BB cups. No creaking or probpems after about 10000km but I think my cups are actually plastic (HSC ceramic BB).

audiophilitis
Posts: 479
Joined: Sun Jul 29, 2012 12:49 am

by audiophilitis

stormur wrote:As a rule carbon-metal needs retainer ( I use Loctite 648 "green" ) , know shops using threadlockers with big success… . If bb shell is bit to much out of specs than grease works. For carbon fiber any "calcium based" grease is OK, I use red Canada Petro for marine use :) .

In mounting on loctite preperation is a key : acetone, then wipe AGAIN with clean cloth, now : activator, 5 min wait , retainer on both surfaces- press and leave for a while ( look at retainer specs ) .

From my experience BB which cause less troubles with assembly and creaking later on are Rotor brackets. NEVER had any issue with them .



+1 on the use of Loctite retaining compound

Frankie13
Posts: 439
Joined: Thu Jan 27, 2011 9:52 pm
Location: USA

by Frankie13

I just installed ceramic 386Evo cubs from FSA and used primer and loctite and the bb is silent as it can be.

Ravnsnaes
Posts: 103
Joined: Thu Dec 22, 2005 2:48 pm
Location: Denmark

by Ravnsnaes

This may sound daft, but glue for tubular tires actually works fine for both metal and plastic BB pressfit cups. It kept things nice and quiet on my last Tarmac SW SL4 and BH G6 frames.

rbrtwyn
Posts: 252
Joined: Thu Dec 09, 2004 1:57 pm

by rbrtwyn

I've actually used tubular glue too. I used it on a BB90 setup. Works perfect as the glue will hold things tight but easy to remove and cleanup.

Husum
Posts: 59
Joined: Fri Feb 17, 2012 9:03 am
Location: Denmark

by Husum

Opted for a small bit of grease due to not having any of the correct Loctite laying around.

Here's the result:


http://www.youtube.com/watch?v=BsOeubnRsJw


http://www.youtube.com/watch?v=AkZiaRKZrRg

by Weenie


Visit starbike.com Online Retailer for HighEnd cycling components
Great Prices ✓    Broad Selection ✓    Worldwide Delivery ✓

www.starbike.com



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