Crank extractor too small?

Trying to get the cranks off an old raleigh gritstone MTB, the problem is the cavity in the crank that you thread the extractor into is wider than my extractor! Does anyone have the correct tool for this that they would lend me?

I've tried hitting/prying the crank off with a claw hammer, ended up breaking the hammer shaft! maybe try a crowbar?

Cheers,

Andy

Heat up the crank with a blowtorch or similar and should bang right off. Works fine as long as the crank isnt too expensive.

cranks are shit (hence hitting with a hammer!)... but i don't have a blowtorch.

;)

ride them off.

okay, i think its the right size, just that the axle is a threaded one, onto which a nut secures the crank, rather than a bolt that goes inside the axle. does anyone have one of those types of extractors?

riding it off and hammering it off aren't options, the cranks are really seized on!

The extractor you speak of is maybe a socket.

haha, no. it would need threading on the outside to interface with the crank. i used one of those ^^^ to remove the nut, but the crank won't just slide off, its properly seized on.

okay, i think its the right size, just that the axle is a threaded one, onto which a nut secures the crank, rather than a bolt that goes inside the axle. does anyone have one of those types of extractors?

riding it off and hammering it off aren't options, the cranks are really seized on!

okay, I have one that I think fits them, will check innabit, dunno when I'm about though.
Have you tried riding them off?

srsly, are you trolling me? YES! THEY ARE SEIZED ON!

...but yeah, if you do have the right extractor and i can borrow it, i'd appreciate it.

^ can you post a pic up (either yours or same from Google images), will see if I've got correct tool from that, am confused by the written descriptions.

one of these goes on the end of the axle (instead of a crank bolt):

and here are the cranks and axle ends

2 Attachments

I would have thought that using a blowtorch would make the crank expand (thus making the hole smaller) and make the spindle expand which would make the two even harder to separate.
I would try freezing it so that the hole gets bigger and the spindle smaller.

Don't try to hammer it if you do though as the metal will be more brittle.

You probably need one of these

and not one of these

sigh that is what i already have. although i have never seen the one below before...

i've got one of those, pic to follow

aking are you at velodrome later? i'll bring with me if so.

I have used one to remove the same type of set up you have.
Perhaps different types can have the inner screw moved into the recess further than others! and still remain engaged in the inner threads.

I'm guessing you can't take the crank/spindle off of the frame so putting the crank in the freezer may be a bit difficult (unless you has a MASSIVE freezer) so try a freeze spray or, if you're feeling reckless, a carbon dioxide fire extinuisher.

Ok, it's same design as what you've got but it's 21.5mm diameter.

If want to give it a shot gimme a shout.

sorted now. thanks for help and ideas though guys. although i do need a 36mm spanner if anyone has one.

got one of them, not round until Weds tho if you can wait?

yeah? that would be handy. can't do anything til wednesday anyway. you in chorlton andy?

yup, gimme a shout weds