Helicoil crank arm pedal insert?

[thebarber]

Has anyone successfully done this?
It's for a kid I know just to get him away. I mentioned it to a mate but we both discounted it as probably too week then I found some kits so must be a valid repair.

 

[JMD]

Has anyone successfully done this?
It's for a kid I know just to get him away. I mentioned it to a mate but we both discounted it as probably too week then I found some kits so must be a valid repair.

It's a valid repair, if done correctly will be as good if not better than original.
But should really get a machine shop or pro to do the job, drilling the hole & cutting the new thread for the insert needs to be done correctly (straight). Get it slightly wrong you've got a wobble pedal.

Probably easier & cheaper to buy a new arm

 

[Tim Jewitt]

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[thebarber]

Cheers, ill pass this on

 

[Gary]

Kids bike cranksets are cheap as. It's finding a suitable replacement that's the hard part.
Try sjscycles.

 

[thebarber]

The kids 15 so a proper mtb (Whyte I think). I've looked online but don't have the bike at hand to see whats on it.

 

[Andrie]

Helicoil and timeserts are proper thread repair. We use it for a lot of racing applications even as critical as engine building, including head bolts which require a lot of torque. I would not hesitate to use it for thread repair. That being said a proper repair is necessary and that depends on the operator. A competent mechanic should be able to do it with hand tools.

 

[Happydog]

I agree with Andrie, I have used them many times on motorcycles down the years.

Had a Suzuki Bandit once we're the previous owner striped two of the four spark plug threads and I repaired them with a helicoil. Bike is still going with no problems even after replacing the spark plugs a few times.

There are plenty of good tutorial videos on YouTube and they normally come in a kit with the correct drill bit, tap and a few of the coils. So you could always have a practice on an old piece of metal or an old crank arm.