John K Jacksonville , FL May 06, 2023 Appliance: KitchenAid 5 Qt. Stand Mixer Professional Heavy Duty Bowl Lift KG25H0XER5 Kitchenaid Mixer Kg25h0xer5: Kitchenaid mixer gears stripped. How to replace Worm Gear Thrust Bearing. Replaced all internal gearing, which had stripped after about 12 years of use. Requires a special c-clip removal tool, but they are not expensive, and a square-drive screwdriver. Be sure to 100% remove all old grease. Do-It-Yourself Rating: Repair Time Estimate: 2+ hours