Big holes in my bottom (bracket)

[svacher]

Hi all,

Is there any "standard" way of filling the hole left in the bottom bracket after removal of the wheel stays and down tube?
I've tried filling with welding but I'm either not a good enough welder or this just won't work.

Any help will be greatly appreciated.

Thanks,

Steve

[jimFPU]

Practice, practice, practice. You will get better with welding them closed.

[jimFPU]

Oh, yes, when you do protect the threads (if you have them).

[fultondp]

I usually weld in a washer, then fill the washer hole, at least for the bigger holes. It just makes for a smaller hole to fill. And as Phil says, protect your threads!

Darren

[svacher]

Thanks very much guys :-)
It's the first time I've welded so as you say Jim, i will be doing plenty of practising.

Steve

[fultondp]

Originally Posted by fultondp

And as Phil says, protect your threads!

Darren

Sorry, I meant Jim. Don't know how I got Phil...

[jimFPU]

Maybe you thought I was a Dr...LOL!

[jimFPU]

Maybe you thought I was a Dr...LOL!

[John Lewis]

Another way is to take a piece of tubing that slides over the BB. If a near fit it can be slit to fit. Slide it on, weld round the ends and weld the slit if you made one. I usually do this with brazing but electric should work as well. Another trick I've used is to find a bit of rod to fit the hole. Better if it is a bit oversize and you can grind a slight taper. Grind the inner end to a hollow curve. You don't really need to do that. Cut off a slice a bit thicker than you need. Plug the hole, weld it in and grind down.

John Lewis

[jimFPU]

Originally Posted by fultondp

Sorry, I meant Jim. Don't know how I got Phil...

Funny thing is I have this above my name on my name tag at work (and it still confuses people...LOL!): Goode, Phil, PhD.

[Richie Rich]

svacher...Like many others, I tack a washer in the hole and then fill it closed with weld and grind smooth. Works great.

===========

Originally Posted by jimFPU

: Goode, Phil, PhD.

HAH...!! Very clever, Jim. I wonder how many people see that and don't get the joke.

---Richie---
.

[jimFPU]

Originally Posted by Richie Rich

HAH...!! Very clever, Jim. I wonder how many people see that and don't get the joke.

---Richie---
.

More than you would think. Engineers are the worst. They always ask where his seat is, or one guy commented once: 'I didn't know you had a PhD.'

[svacher]

Thanks for all of the feedback help guys, while doing some further research i found Sparkys thread on the "the perfect bb" i remembered one of my donor bike had rear suspension and to my great joy it too had the "perfect bb"

I managed easily to fill the tiny holes in this bb and it's now fitted to the frame ;-)

Steve