Schoolboy error - crossed thread

REKIBorter · Sep 16, 2008

OK it was getting dark and the mrs was nagging me about finishing up and coming in for the night, did a stupid thing, managed to cross thread the rh pedal thread into the crank. What is the cheapest option?

Take it to the LBS and pay through the nose to get it rethreaded?

Buy a tap and dye set for about £15 and have a go myself? Anyone know what size I will need?

Buy new cranks? The old ones are nothing special, square tapered BB Deore 2004

shovelon · Sep 16, 2008

Size thread is 9/16" x 20 pitch. If you buy a tap, chase it from the backside.

If the threads are junk, an automotive machine shop can install a helicoil. Better than buying a new crankset.

The killer is the left side crank as it is left hand threaded.

stevek · Sep 16, 2008

You've got the pedal out yeah?

You may be able to save it. Screw the pedal in from the other side and it might just chase the threads out. Then try it again from the correct side.

Worth a go.

REKIBorter · Sep 16, 2008

Tried that already, does not reach through to the bad bit on the other side

stevek · Sep 16, 2008

Take to LBS and let them use a proper tap and maybe save it.

Or:

Cheap mans tap:

Get a bolt the right size and hacksaw a slot down it, use it as a tap. No guarantees...

The Ken · Sep 17, 2008

spotted this in forsale section - any help?

http://www.retrobike.co.uk/forum/viewtopic.php?t=38244

retrojon · Sep 17, 2008

Have you got an old pedal with a longer thread? Or a scrap pedal and grind off the shoulder, then run that through.

Schoolboy error - crossed thread

REKIBorter

shovelon

Senior Retro Guru

stevek

REKIBorter

stevek

The Ken

retrojon

Retro Guru

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