Dear Home Depot Customer,
We are sorry to hear that you had trouble with your blade. The good news is that we stand behind our products and we are here to help! The arbor is meant to be popped in or out depending on the arbor size of the saw. We would like to discuss the situation you have encountered and assist you with a solution. Please feel free to give us a call at our RIDGID customer support number at (877) 224-2969 so that we can help.