Anodiser recommendation around west london / home counties

[M-Power]

Re:

Thinking about this.

 

[ti_pin_man]

Ditto.

 

[unit3]

X3.......

 

[ti_pin_man]

Starter for ten, if only one side of the cranks was too worn why couldn't you weld the worn arm onto the Bb spindle, thread in one side and tighten with other and connect good side? Sure you couldn't swap out the bb but it would extend life.

Plan b, if both were worn then can you not use and say ti spindle to mount the crank arms. Fill in the gaps with alu weld then when set remove ti spindle leaving solid crank tapers that could be used? Is there a weld material this could be done with? Can you tell I'm not an expert. ;-)

 

[unit3]

Starter for ten, if only one side of the cranks was too worn why couldn't you weld the worn arm onto the Bb spindle, thread in one side and tighten with other and connect good side? Sure you couldn't swap out the bb but it would extend life.

Plan b, if both were worn then can you not use and say ti spindle to mount the crank arms. Fill in the gaps with alu weld then when set remove ti spindle leaving solid crank tapers that could be used? Is there a weld material this could be done with? Can you tell I'm not an expert. ;-)

Most if not all cranks are alloy, most (but not all) bottom bracket spindles are steel, you cant weld one to the other

The issue you would get with plan b is keeping them central while filling the gaps, it is theoretically possible I guess, but would take a bit of messing with.

I might have a go at this over the Xmas break, but im sure it has probably been tried before, and there is a reason it's not more readily done :?:

 

[unkleGsif]

Re:

I've tried the chemical metal bodge/fix before, and it just cracked and failed after a short while.... mind you, this was yeas ago and products have probably improved somewhat

G

 

[ti_pin_man]

I suspect even if improved the likes of weldtite still wont stand the pressures for long enough.

How about a plug? Could the inner sides be machined out, a metal plug hammered in and in some way attached to the crank arm. I guess this is similar to weldtite, it'd eventually go.

Or can the whole hole -)) be filled with liquid metal to bond with the alu then drilled out back to proper tapers?

Brain farts?

 

[Rampage]

Most of then are too thin to drill out and replace, at least ones worth doing it to are!

 

[ti_pin_man]

Rampage, not sure what you mean, if we 'filled' the spindle hole in the cranks with weld that bonds to the alu, then in effect re drill the spindle hole to the right size it would remove the worn gaps where the soft alu has worn, That's what I was thinking... brain farts.

 

[unit3]

Re:

I think the problem will be a square peg in a round hole situation.
There must be a way dammit!

If the likes of Joey Essex can get payed for being stupid, we can get payed for being clever!