Mikel E Archdale , NC October 05, 2015 Appliance: Whirlpool 4 1/2 Qt. Stand Mixer Classic - Tilt K45SSAC-0 Whirlpool Mixer K45ssac-0: Nylon worn off of beater. How to replace Coated Flat Head Beater. Installe the new beater I ordered from Appliance parts pros.com and adjusted the screw to where the beater was not rubbing the bottom of the bowl and had sufficient clearance. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes