[dovbush66]

Got a saint press fit bb and wondering what's the best way to install them into an alloy frame to be creak free and stay tight.

Looked around youtube and people seem to be doing it different ways. Either pressing in with grease, carbon paste, dry or a medium strength bearing retainer. Shimano's tech docs seem to point to going in dry.

from what i understand they're basically like an american bmx bb but plastic so the bearing can float inside?

 

[englertracing]

dry or medium strength loctite.

 

[johnbryanpeters]

Got a saint press fit bb and wondering what's the best way to install them into an alloy frame to be creak free and stay tight.

Looked around youtube and people seem to be doing it different ways. Either pressing in with grease, carbon paste, dry or a medium strength bearing retainer. Shimano's tech docs seem to point to going in dry.

from what i understand they're basically like an american bmx bb but plastic so the bearing can float inside?

Part number?

 

[dovbush66]

Part number?

SM-BB71-41C

Looks like it's the same as all the other BBs but with a wider spacer cup

 

[johnbryanpeters]

SM-BB71-41C

Looks like it's the same as all the other BBs but with a wider spacer cup

So Shimano's instructions seem not to recommend anything, and I'd be inclined to believe that they'd like the frame squeaky clean.

https://si.shimano.com/pdfs/dm/DM-FC0001-00-ENG.pdf

 

[Westy]

Used slick honey on the current steel frame with Shimano BB, has been creak free. Have used bearing retainer on a more problematic carbon frame. As even alloy can oxidize I would recommend some kind of grease.

 

[dovbush66]

So Shimano's instructions seem not to recommend anything, and I'd be inclined to believe that they'd like the frame squeaky clean.

https://si.shimano.com/pdfs/dm/DM-FC0001-00-ENG.pdf

checked the tl-bb12 instructions too and also says use nothing. I'll chance it that way so!

 

[Jm_]

As even alloy can oxidize I would recommend some kind of grease.

Thisthisthisthisthis


These days I use an anti-seize grease.

 

[englertracing]

checked the tl-bb12 instructions too and also says use nothing. I'll chance it that way so!

I can tell you, pivot use(d) loctite on the bb and headset cups on carbon frames

 

[johnbryanpeters]

I can tell you, pivot use(d) loctite on the bb and headset cups on carbon frames

Apples and oranges. This is an aluminum frame.

 

[Sandwich]

I always use a little grease. Have installed two plastic-cased BBs so far, one shimano and one FSA and they are both creak free with a little mobil 1 hub grease on there.

 

[Bikael Molton]

I used grease on my aluminum frame, and haven't had a bb creak in 2,500 mi.

 

[MikeD]

Do you guys use heat when installing bearings?

I never thought about it till I was working with motorcycles, but typically now I freeze bearings/cups/races/whatever and heat whatever's being pressed into. Obvs I've never had a crabon bike, mind you.

 

[MikeD]

also -1 for lack of excessive lube jokes. Parse that any way you like.

One hint of dry entendre, but that's all?

 

[Bikael Molton]

I’ve never needed to, but I know it’s a technique.

I feel like manufacturing tolerances are better than they used to be on stuff like this.

Do you guys use heat when installing bearings?

I never thought about it till I was working with motorcycles, but typically now I freeze bearings/cups/races/whatever and heat whatever's being pressed into. Obvs I've never had a crabon bike, mind you.

 

[Jm_]

Do you guys use heat when installing bearings?

I never thought about it till I was working with motorcycles, but typically now I freeze bearings/cups/races/whatever and heat whatever's being pressed into. Obvs I've never had a crabon bike, mind you.

I do that

 

[jonKranked]

Do you guys use heat when installing bearings?

I never thought about it till I was working with motorcycles, but typically now I freeze bearings/cups/races/whatever and heat whatever's being pressed into. Obvs I've never had a crabon bike, mind you.

no, but i have the appropriate bearing presses (headset, BB, hadley) to avoid that manner of nonsense. i have tossed bearings & races in the freezer in the past, but i find that's not necessary on modern stuff, specifically because of things like integrated headsets, etc [edit] and as rpet mentioned, tolerances are better now. plus things like integrated headsets are machined and rely less on reaming than the old style headtubes (ie tubing)

 

[jonKranked]

Apples and oranges. This is an aluminum frame.

i can't remember where exactly i read it (it was the website for something like wheels mnfg or praxis works or something like that) and their recommendation was Loctite RTV silicone for both aluminum and carbon frames. i used it on my 2013 scott spark and the BB has been creak free ***knocks on wood*** note: this is also with 30mm spindle cranks

 

[Lemke]

I use Loctite 641 for press fit bottom brackets... not the typical blue (242), or heaven forbid the red stuff (271). 641 is designed specifically for cylindrical fitted parts (bearings, etc.) that require frequent or not so-frequent disassembly and reassembly.