Hello I want to ask that is it possible to have the number of teeth of sun gear and pinion will be same? As In my case the ratio is 4:1....outer ring is fixed and sun gear is the input. I want to use three planets. and if I take 14,16,17 for the sun gear then the condition of (Z1 +Z3)/number of planets should be integer. but if i take 15 for the sun gear then the number of teeth on planet is also 15 with 45 on ring..... I want to ask is it right to take 15 teeth for both sun and planet and 45 for ring to get the ratio of 4:1????