... Dual Speed Scrubbers low noise and long life 1).Ratios of 10:1, 8:1,7:1,5:1. as requirement2).3 Planets to match your ... incorporate hunter tooth design for long life and quiet operation.5).The sun gear is heat treated and has the largest ... ).High efficiency,High reliability,Little vibration,Low noise FLOOR POLSIHG MACHINE GEARBOX RATIO 5:1