bottom bracket CUPS

[Deleted member 89567]

Hello,
Does anyone have a tip to disassemble these two metal cups ? By hitting them?
Thanks
Julien

 

[B607]

I use a 1" dia. brass rod about 8" long. Tap them out from the inside. Sometimes it takes a pretty good whack to get them out.

 

[Freqman1]

I use a 1" dia. brass rod about 8" long. Tap them out from the inside. Sometimes it takes a pretty good whack to get them out.

...and same thing with headset. V/r Shawn

 

[gkeep]

I've found a piece of broom handle works well, soft and the diameter spreads the force along a large area of the cups.

 

[Rivnut]

With the punch, work your way around the circumference. You cannot just hit it in one place.

 

[Archie Sturmer]

I use an old 5/8” steel straight seat post.

 

[Deleted member 89567]

@B607 @Freqman1 @gkeep @Rivnut @Archie Sturmer Thanks to you, it's done

 

[GTs58]

@B607 @Freqman1 @gkeep @Rivnut @Archie Sturmer Thanks to you, it's done
View attachment 1503385

Those cups sure made a mess of your hammer's handle. In a pinch I've used a short piece of scrap 1 x 2.

 

[Rivnut]

When using a piece of wood for a drift, a lot of force is lost in the soft composition of the wood. Something solid works much better. Even an old large straight tipped screwdriver will work well. A heavy, dense drift, and a large hammer make quick work of these cups. I have a solid 1/2” piece of round steel (fits inside a pipe to make an extension handle for a breaker bar) and a 4# short handled sledge hammer. Takes about 3 hits spaced around the circumference to pop one out. Keep one eye where you’re hammering and the other on the other side of the room to spot where the cup winds up; it will go flying.

 

[J-wagon]

Even an old large straight tipped screwdriver will work well.

Yes, my typical method.

it's done

Mission accomplished. Just curious what type of work are you doing on BB and cups?