BB and stripped threads question

If the crank is held on with a nut and you have an old pre cartridge bottom bracket then remove the drive side crank and the drive side BB cup. The axle will now be loose in the frame. Loosen the nut on the non drive side axle a couple of turns, put a socket (usually 14mm) on it and with the frame suitably supported hammer the socket to push the axle through the crank. Pouring hot water on helps here too.

nice one sound good, will defo give it a shot.