help with crank
 

when i try to pull it off the spindle with the crank puller the thing my crankpuller screws into is either miss threaded or stripped any ideas ..

is it an older/lower quality crank? if so, i'd say the best idea is to get them mother****ers off however you can and replace the crank and bb. this is of course if you have money, otherwise i guess you could tighten the crank arm back on and keep using it until you can save up. anyone with a better suggestion, please interject.

the threads might be filled with sand or grit, try cleaning them out. worth a shot. Also, what kind of cranks are they? some older cranks need special threaded pullers (old french cranks for instance.)

crank
 

it is a 74 bianchi if that makes aidfferent i tryed cleaning it and everything

well then, sounds like its stripped. I don't know what to tell you.

dremel it off, you will **** up the BB though

sounds like you stripped the dust cap threads.. if the bb is cup a loose ball type just take that off with the crank attached and call it a day..

Hacksaw.

I think I remember Sheldon Brown addressing this. He said to just ride it around the block, close to home, until it fell off. Just make sure you can walk home.

sounds like it's either cross threaded, or a few threads have a burr, or have stripped out: little spring shaped shavings will come out as you unscrew it if it's stripped out.

you can tighten it back up until you can remove it but be careful not to overtighten it

once removed, you can chase the threads if it's not stripped out, but once cross threaded they usually strip out when you either chase it, or re-tap it.

it is possible to bore out a BB, install a sleeve, and re-cut the threads, or bore & tap it for a custom heli-coil (STI) but this is major surgery and usually $$$$$.

Well you could get a hacksaw and cut the arms off the axle especially if the crank needs to be replaced(just dont cut too deep and cut the axle).

If there are good bike shops around you (esp. one specializing in old/utilitarian bikes) you should be able to have them chisel off the crank. I forget what the tool is officially called, but it's basically a wedge with a slot for the spindle to go through. You place the tool between the BB shell and crank and give it a few whacks with a hammer, and it will come off.

If not and it's not a rusted mess, I would oil the crap out of it and ride around your block until it loosens up and comes off on its own. Don't try to do anything dumb like whaling on it with a hammer through the frame and denting your seat tube...