4mm-8.5mm Hollow cup decelerator reductorHollow cup gear rc plane diy parts model plane diy

4mm hollow cup motor reduction unit (ultra light 0.2 grams) 1: motor, 4*12mm hollow cup or 4*14 hollow cup 2: gear set journal 0.8mm 3: weight 0.2g (including motor 0.9g) 4: voltage 1-4v 5: gear ratio 48:8 6: 0.7mm hole in the middle, wear 0.8mm carbon fiber rod fixed 7: with 80mm pulp tension of about 6 grams       6mm hollow cup motor deceleration group 1: motor 6*14mm hollow cup 2: gear set journal 1mm 3: weight 0.6g (including motor 2.3g) 4: motor speed 50000 5: voltage 1-4v 6: with 4 inch pulp, pull about 18 grams 7: gear ratio 48:8 8: 0.95mm hole in the middle, used as a 1mm carbon fiber rod fixed     7mm hollow cup motor deceleration group 1: motor 7*16mm hollow cup 2: gear set journal 1mm 3: weight 1.2g (excluding motor) 4: ultra high speed motor speed 58000 rpm 5: voltage 1-4v 6: with 5030 slurry tension of about 30g 7: gear ratio 48:9 8: the middle has 1.2mm, round hole has 1.8mm square hole, used for fixing