Bottom bracket removal

[funk2monk]

Cleaning up a few old frames and i have removed all salvageable parts except the righthand sjde threaded cup!
The other side is relatively easy and a conventional spanner fits, but this side is larger than my biggest 32mm but so thin i cant grip with a set of adjustables!
Thought about welding a couple of bolts on the face and then using them to wedge a bar in and turn but this will just ruin what is a usuable part.
Looking for suggestions or tricks of the trade please

 

[alicat]

Headset spanners come in 34mm and 36mm. They are thin.

 

[biggs682]

Big but and bolt and keep tightening the nut up and eventually it will come out with the cup .

 

[Yellow Saddle]

Cleaning up a few old frames and i have removed all salvageable parts except the righthand sjde threaded cup!
The other side is relatively easy and a conventional spanner fits, but this side is larger than my biggest 32mm but so thin i cant grip with a set of adjustables!
Thought about welding a couple of bolts on the face and then using them to wedge a bar in and turn but this will just ruin what is a usuable part.
Looking for suggestions or tricks of the trade please

The right tool for the job is always the best - a proper BB spanner will do.

I know you don't want to do this but to save you one imaginary step, just weld the bar straight onto the cup and skip the intermediate steps for first welding a couple of bolts.

 

[I like Skol]

Big but and bolt and keep tightening the nut up and eventually it will come out with the cup .

This^^^^
The big nut and bolt through the axle hole works everytime.

 

[GuyBoden]

BB removal. including; The big nut and bolt approach.
https://www.sheldonbrown.com/tooltips/bbcups.html

 

[midlife]

I've got something like this but the big nut trick is just as good if not better

 

[Yellow Saddle]

I've got something like this but the big nut trick is just as good if not better

View attachment 479568

I've never seen that. How does it work?

 

[midlife]

I've never seen that. How does it work?

Its in 3 bits.... the t-bar, interchangeable tool that fits over the fixed cup and the screw that goes through the t-bar From left to right in the above pic.

Assembled together with the tool over the fixed cup and screwed through the fixed cup it's basically a spanner

 

[Yellow Saddle]

Its in 3 bits.... the t-bar, interchangeable tool that fits over the fixed cup and the screw that goes through the t-bar From left to right in the above pic.

Assembled together with the tool over the fixed cup and screwed through the fixed cup it's basically a spanner

Thanks, but I can't visualise it. I'll look it up.

 

[biggs682]

Thanks, but I can't visualise it. I'll look it up.

Glad i am not the only one

 

[midlife]

T bar on the right placed over the fixed cup. Long bolt goes through the bottom bracket shell and fixed cup into the tool. Tightening the bolt clamps the t bar onto the fixed cup so cannot slip off the fixed cup. Then use t bar to remove. Cant find a pic of it being used lol

 

[biggs682]

View attachment 479699

T bar on the right placed over the fixed cup. Long bolt goes through the bottom bracket shell and fixed cup into the tool. Tightening the bolt clamps the t bar onto the fixed cup so cannot slip off the fixed cup. Then use t bar to remove. Cant find a pic of it being used lol

So similar to big nut and bolt then

 

[Yellow Saddle]

View attachment 479699

T bar on the right placed over the fixed cup. Long bolt goes through the bottom bracket shell and fixed cup into the tool. Tightening the bolt clamps the t bar onto the fixed cup so cannot slip off the fixed cup. Then use t bar to remove. Cant find a pic of it being used lol

Now I get it. Very elegant, actually.

 

[Yellow Saddle]

So similar to big nut and bolt then

No, nut and bolt rely on friction, this relies on mechanical engagement with tension as a slip preventor. Very nice.