I have a really nice and very expensive crank arm that due to a shops negligence, stripped the removal threads on. Long story short, the shop isn't covering their goof up. They removed it, but in the process stripped the treading.

I'm wanting to put it back on a bike but wondering what are some options to remove it in the future without damaging the cranks.

All that comes to mind is to use a gear puller and see if that works.

A gear puller is one option, but some cranks don't have clearance for the puller's arms to get behind the crank. Jacobs chuck remover wedges can also work. Slip a pair behind the crank, between the crank and the bottom bracket, tap them together and they can force the arm off just like removing the chuck from a drill press. Or, you can remove the retaining bolt and ride around for a while until the crank loosens on its own. This can happen surprisingly quickly. Best to just circle the block until this happens so you don't have too long a walk back to your home/shop.

Oh, and find a new bike shop for future work. But you knew that, I'm sure.

Yeah, LBS lost me for good. But thats all past. I'm a bit weary of riding it without the bolt as I hear that can round out your cranks.

I'm not expecting to remove them often, and to be safe am going to put in a whole new BB to make sure I get some life out of them before they would need servicing again.

You only ride it until the crank comes loose, then walk it home, hence the advice not to get too far away.

I'm guessing that finding a heli-coil for 22x1 (or 23 or 23.35, depending upon crank) mm will be hard. Is the arm too expensive to replace? As usual, the inimitable Mr. Sheldon Brown has some useful comments, here.

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...there's an oversized tapping tool that you then use as the removal tool, but nobody seems to sell it any more, and it was kinda pricey anyway. There really are not too many options for this. If you're using it, make certain to install a new, longer life, high quality BB unit of the proper length and you'll get a lot of miles out of it before you need to figure out how to get it off again.

I've removed a lot of them for people, and it's always a PIA. So generally, even if it's a very nice crank I just save the chainrings/bolts and toss the arms. Not worth the effort you go through to get it off again.

There's a few really good answers here:
Link

Try this. Unscrew the spindle bolt until the head protrudes above the surface of the crankarm slightly. If you can find a bolt that is slightly longer so that you can screw it all the way in and still have the bolt head protrude past the crankarm this would be better. Now holding the bike up by the crankarm with the bike parallel to the floor hit the head of the bolt with a soft head hammer or mallet. Don't get too carried away with the hammering, you don't want to ruin the bolt or the spindle threads. Also right before attempting this pour some boiling water over the crank. Of course it's much easier if you have someone to hold the crankarm while you do the hammering but can be done solo if you're strong enough.

Still available. UBS shows the Stein crank extractor system in stock. I've had one for a dozen years and used it a few times.
https://www.unitedbicyclesupply.com/i...=Thread_Repair
Makes for a good permanent repair when used with the self extractor caps made for use with the system.
I also have a puller made for the oversized threads.

...Stein makes one ? I didn't know that. There was some small operation up in Portland somewhere that was making one for a while, but I think they went out of business.

Var made an identical one complete with the self extractor caps. Couldn't tell ya if they still do.
EDIT: Well, look at that. it appears they do still offer it.
https://www.vartools.com/en/repair-k...d-var-p402.php

If its a loose ball BB, and the stripped threads are on the drive side, you can depending on the spindle length, remove the drive side balls with a small magnet. Then pull the spindle and arm with the fixed cup. Then you can mount the arm in a press and push out the spindle.