Bearing Cups

[cave12man]

Is it possible that bearing cups are not removable? I tried getting the cups out last night and they wouldn't budge. It may be because they are rusted in and need a little more muscle, but wanted to check before I go banging on them. Thanks!

 

[xHOBOPHOBIAx]

might do a star pattern in banging them out. hit one side, then the opposite, then one of the other sides... and so on.

 

[cave12man]

cool thanks, I'll give that a shot tonight

 

[deorman]

Hopefully you're drifting them on the inside, not banging on the actual race area. :| I've run across a few that take a good whack with the BIG hammer. :wink: To avoid frustration and paint damage when putting them back, stick 'em in the freezer for 10-15 minutes first. :shock: No, I'm not kidding.

 

[xHOBOPHOBIAx]

Hopefully you're drifting them on the inside, not banging on the actual race area. :| I've run across a few that take a good whack with the BIG hammer. :wink: To avoid frustration and paint damage when putting them back, stick 'em in the freezer for 10-15 minutes first. :shock: No, I'm not kidding.

that makes sense. shrink it just enough to not be too hard.

 

[deorman]

Also works on crank bearings on those leaky old ankle breakers the Brits used to sell. :lol: (back when they could still out run Hondas) :mrgreen:

 

[cave12man]

For now I'm trying to get them out any way possible. They aren't really needed anymore since I have a new BB coming. The bearings were all rusted out so I figured I'd just replace the whole bit.

I've seen some postings say that for the headset in this type of bike it's a good idea to keep the headset cups because they are a weird size? I do need a new headset since I bent the locknut when taking it off. Anyone know if this is true? I'm also not sure which size to get. Hoe do you measure the headset?

 

[xHOBOPHOBIAx]

i don't know if it's true, but i have found that it is just less of a hassle to reuse the ones that came out of the frame if at all possible because the head tube is already that shape.

 

[cave12man]

And then I would use the new parts with the old cups?

 

[xHOBOPHOBIAx]

as long as the bearings fit in the old cups yes.

 

[cave12man]

great i'll be keeping my fingers crossed then!

 

[Pinche]

You could also heat up the bottom bracket tube or spray some penetrating lube. But I've never had a cup I couldn't remove without just hammer/mallet and a steel punch. The punches last a little longer then using a screwdriver. lol. Plus the brass punches won't damage your cups. Like these

 

[xHOBOPHOBIAx]

I have a cheep pair of Stanley punches that i use, they are at walmart, cheep, and long

 

[bicycleguy]

I've worked on a few Euro road bikes that use a 1 piece crank but the BB cups thread into the frame like BB cups for a 3 piece crank but bigger.