DarkSpeedWorks wrote:
Since it is a manufactured item that started as at least two different pieces, and since steel and AL alloy have different melting points, I imagine that it is, at least in theory, in some way "removable". But, l think that the real question is, is it removable without damage to the AL alloy crank section? I very much doubt it.
Any reason that you want to remove it ? Maybe there is another far easier solution to your issue ?
My suspicion is the same. I haven't found a replacement spindle sold separately either, so it may be impossible to source anyway.
Taugen wrote:
DISCLAIMER: I offer this only as information, and DO NOT know for sure if my theory is correct...
My guess is that it is threaded into the steel collar ring that sits at the insertion point. I suspect that steel collar ring is heat pressed in, and it is likely splined to bite into the aluminum spider body. I bet this is the case so that the steel spindle mates to a steel ring in order to handle the load and not rip out of the aluminum. If the spindle was simply pressed in and not threaded, I bet it would just twist out or may pull out when under heavy load.
So, the question now becomes is it reverse threaded into the steel collar ring, just like how one pedal is reverse threaded?
If it were me, I would gently hit the insertion point area with a propane torch for a minute, and then try unscrewing the spindle in each direction until you feel it release one way.
The insertion point has a rubber gasket or ring so the torch might do some damage there. I hope someone braver than I has tried this and could chime in!
BobAjobb wrote:
Why do you want to ?
I'd be nervous that it will be loose afterwards - whilst I don't know the design details, sometimes fits into Aluminium is designed so the Al yields (not just an elestic fit).
Good point. If the aluminum was deformed over a steel collar, then it won't come out without damage.
