Thomas P Hitchcock , SD October 03, 2014 Appliance: Model KITCHENAID APPLIANCE. Beveled hub gear and thumb screw were broken After locating needed parts from Appliance Parts Pros large parts inventory, I was able to disassemble, install and reassemble our Kitchen Aid appliance in less than 30 minutes. Our Kitchen Aid Appliance is once again working like new!! 4 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes