Removing a crank with a destroyed thread

[Andy in Germany]

I've finally found a frame that I can restore to make a 28" wheel touring bike, and we're having trouble removing the old components. In particular the chainwheel screw thread , were we would normally insert the removal tool, is completely gone.

The frame is from VSF Fahrradmanufaktur and is a rare early butted example, made from Chromoly, so it's worth fighting for.

How would others on the does anyone have a recommendation how to remove the chainwheel? I can get the outer two gears off from the outside, but the inner is inaccessible. I'm open to all suggestions, up to and including using a disc cutter to cut through the crank itself.

 

[ivegotabike]

google showed me this video, could it help?


View: https://www.youtube.com/watch?v=jrpIoXxVyTs

 

[fossyant]

Angry grinder or even a Dremmel

 

[Punkawallah]

Angry grinder or even a Dremmel

If you have a replacement for the square taper spindle, and don’t need the crankset, a grinder cut across the offending part of the crank will do the trick. Otherwise, R J is your man.
Good luck!

 

[ivegotabike]

google showed me this video, could it help?


View: https://www.youtube.com/watch?v=jrpIoXxVyTs

Amazon has quite a selection of "three leg bearing pullers" or "three jaw gear extractors" etc.

This listing has various sizes that start at £7.55. I have no idea if any of them is suitable, but they look a bit like the one in the video

https://www.amazon.co.uk/dp/B01AGKYL30

 

[MontyVeda]

I'm open to all suggestions, up to and including using a disc cutter to cut through the crank itself.

If the bike is ridable then just ride it and the crank will drop off. They're bolted on for a reason. Leave a loose(ish) bolt in if you don't want it to drop off completely.

 

[Gunk]

I would try a bearing puller, I’ve removed one with a stripped thread using one