Stripped crank thread - what to do?

[phantasmagoriana]

Shiny new SPD pedals arrived this morning - being keen to fit them to my Galaxy, and having already tried removing the old pedals with the cranks still on the bike (Plusgas & pedal spanner - no joy), I decided to remove the cranks first and work on the pedals off the bike.

However - I somehow managed to overlook the crank bolt (not sure how - I've taken the cranks off this bike and others before and never done this!), and happily tightened up the crank puller with it in place...result, stripped threads in the LH crank.    

Now, I realise I'm going to need a new crank, but how on earth can I get the old one off without being able to use the threaded tool?  

 

[Smokin Joe]

Make a cut through the crank with a hacksaw and you will be able to pull it off.

 

[jimboalee]

Yup, cut it off.

 

[fixedfixer]

stripped threads in the LH crank.

You had remebered that the left hand pedal was a left hand thread? Sounds like you might have been tightening that side before you resorted to removing (or not) the crank.

 

[RecordAceFromNew]

There are a few ways less drastic than cutting it off. See this.

 

[Smokin Joe]

If the crank's buggered anyway sawing wouldn't count as being drastic.

 

[fossyant]

Did this recently to my MTB - thread striped after many years of abuse...... drill and hack saw through.

SJS to the rescue with a correct left hand crank though, for a 90's Deore LX Crankset..

 

[phantasmagoriana]

Thanks for the suggestions - looks like it's hacksaw time! At risk of sounding (even more) stupid, where should I be cutting to make sure I get it out?




  

 

[phantasmagoriana]

SJS to the rescue with a correct left hand crank though, for a 90's Deore LX Crankset..

Thanks, I shall try there as this is a 90s Deore LX crankset too! 

 

[Sittingduck]

There are a few ways less drastic than cutting it off. See this.

Thx for this link - going to try the boiling water method on my drive side crank, I think!

 

[rusty bearing]

If you use a small angle grinder with an Inox blade ( @1.5mm thick for cutting stainless steel) the crank generally loosens because of the heat generated. Sounds brutal but works a treat