The pedal threads stripped out of the cranks on my sons bike. I guess both the pedal and crank threads were weak and now both are shot. Are there any uses for old ds crank arms? They're decent record alloy cranks and I hate to just toss em.

I've seen some older campy hubs where someone flattened one side of the flange and put an angled cut through the flanges on the other side to turn them into a business card holder that looked pretty cool. Not sure if there's an analogous thing you can do with a crankset. Maybe somehow turn them into bookends after removing the rings and polishing?

You can have a threaded insert installed and reuse them.

Is that a DIY or an lbs job?

diy for sure. If you can find the Kit.

i bought a drive-side campy gs crank arm for its rings, and now it's hanging on the kitchen wall. it looks great, and is a nice conversation piece.

it can also serve as a mace-like weapon, an eggbeater, or maybe a terribly performing spatula.

I'd take it to a shop.

If the average guy at the bike shop can properly do a Helicoil, I'd be surprised. Ask around if they have any experience.

Park Tool Co. ť ParkTool Blog ť Pedal Bushing Repair Kit Procedure

The issue isn't the difficulty of the job (it's pretty easy) but the expense of the tools required (specific oversize right and left hand taps). This can make the DIY approach unappealing for a one-off job.

+10!

Clock.

At the co-op we used busted NDS cranks as drawer pulls for the workshop drawers.

Wouldn't one of those make a heck of a weapon?

I could see slicing through a zombie horde with a crank arm attached to some razor sharp chainrings...

Handle for a chain whip.

Like mine?

[QUOTE=WNG;16872998]Like mine?

Ha ha. Something like that. Ok. Exactly like that.

Will for the win!

this is what happened to me today: stripped threads on a beautiful, shiny campy nr 3-hole fd cable anchor arm. it made me sad. i got another on ebay afterwards for $20. so it goes.

but here's a post-purchase dilemma: should i spend another $15 to fix the stripped derailleur using loctite form-a-thread? i just read about it. it sets up in minutes, and is supposed to be strong enough for this type application. what i really want to know is: can loctite form-a-thread be used multiple times after months of storage of unused product? for me, it would make sense if i could use it again and again.

and i wonder if it would be strong enough for crank threads.

LoctiteŽ Form-A- ThreadŽ Stripped Thread Repair - Henkel

says it allows for up to 128 ft/lbs of torque. but i have little frame of reference for this.

128 lbs-ft of torque is more than a car wheel nut should be be tightened to. Typically around 100 lbs-ft. Of course this is steel on steel not like many bike parts which are often steel on aluminium. should work fine base on this spec.