Series make your own tools : I show how to remove your crank arms without the special tool. Without causing any damage. Using nothing but a piece of pipe, a bushing (or socket) and a bolt. I also show you how to create a bearing cup wrench. This will work for extremely seized crank arms where the actual tool will destroy the crank arms and probably itself. In the video i use the following: Gas line or fence post PIPE: 5"1/4 inches long, outside Diameter (OD) 1"5/8 inches with wall thickness of 1/8" inches (3mm) BUSHING (or socket) 1" inch long with outside diameter (OD) of 3/4" inch and inside diameter of 1/2" inch with wall thickness of 1/8" inch The BOLT used is a low grade 1" 1/2 inch long with 3/8" inch wide threads.
my other crank removal videos: other video's showing this [ Ссылка ] and [ Ссылка ] and [ Ссылка ]
Correction : for the right crank arm (drive side) turn the bearing cup clockwise due to it being reverse threaded.
Also, i mention you dont need a tool to remove the left side (non drive side) bearing cup, however if it is stuck you can use a wrench over the flats of the cup in most cases. If there are no flats then use a flat screw driver to hammer the cup to unscrew. If you are dealing with an aluminum frame the bearing cups may be ridiculously tight as shown in the video of the supercycle bearing cups which had to be hammered for about an hour before they started to slowly unscrew. make sure to use a very large and solid flat screw driver for this and be persistent as its possible the cups will never really turn easily as was my experience with this supercycles bearing cups. Before you re-assemble the cups into the frame, grease the threads of the cups and inside the threads of the frame this will provide a moisture seal and prevent seizing and cold welding. For full transparency the left crank arm (prowheel brand) polished aluminum (not shown in the video) of the supercycle shown was hammered off with just a hammer on the inside of the left crank arm. If done carefully and with a limited amount of force then absolutely no damage will occur except cosmetic damage to the inside of the left crank arm. This will give you better access to remove the non drive side bearing cup IF it is severely seized. In the case of the SR suntour cranks shown i did not want to risk damaging them by hammering on them plus the degree of cold-welding was much more severe then the supercycle which instead had seized bearing cups.

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