Just got done cleaning and greasing this metabo w 1080-125rt 5 inch 10a grinder. Took in total about 4 hours to clean . I completely cleaned out the gear box of the old grease and put new and cleaned everything else good. The grinder is the welding shops at my school at took it home and clean her up real good, i have included some pictures from what it looked like before and after have a good one thanks for stopping by