THE PROBLEM with the right axel shaft is NOT the size of the shaft himshelf
BUT THE GEAR WITH THE BALL BEARING WHO BROKE(CRACK) AT THE MOST FRAGIL LOCATION
JUST BETWEEN THE HOLE RECEIVING ONE OF THE 6 BALL AND THE SPLIND GROVE OF THE SPROKET
THE SHAFT HIMSHELF DID NOT BROKE,BUT SPIN INSIDE THE TRIPOIDE
IS THAT MORE CLEAR