Feature: 1. Multiple Accuracy Machining: The trolley motor has a high accuracy shaft, multiple accuracy machining, and has passed strict dynamic and static balance tests to ensure smooth operation and low noise. 2. High Strength Magnetic Tile: The trolley motor with high strength magnetic tile has long life, strong power and large torsion. 3. Fully Enclosed Structure: The trolley motor adopts a fully enclosed structure, which is small in size, which can effectively reduce weight and save space. 4. Pure Copper Material: Pure copper winding, pure copper coupling, low resistance, quiet and durable, low heat generation, low loss, and powerful operation balance. 5. Application: This is a car motor that can be used to make balance cars, DIY smart cars, and electric toys. Specification: Item Type: Encoder Motor Set Model: JGB37-520 Material: Brass, Copper, Magnetic Tile Purpose: Balance Car, DIY Smart Car Operating Voltage: DC 12V Shaft Diameter: Approx. 6mm / 0.2in (D Shaft) Shaft Length: Approx. 15.5mm / 0.6in CW CCW: Support Reduction Ratio(Change Ratio) 6.3 10 19 30 56 90 131 168 270 506 810 No Load Current(mA) ≤120 ≤120 ≤120 ≤120 ≤120 ≤120 ≤120 ≤120 ≤120 ≤120 ≤120 No Load Speed(rpm) 1590 1000 530 333 178 110 76 60 37 20 12 Rated Torsion(Kg.cm) 0.7 1 2.2 3.5 6.5 10 15 19 30 35 35 Rated Speed(rpm) 1200 770 407 250 140 85 58 46 28 15 9 Rated Current(A) ≤1 ≤1 ≤1 ≤1 ≤1 ≤1 ≤1 ≤1 ≤1 ≤1 ≤1 Maximum Torsion 1 1.6 3.1 5 9 15 24 31 Maximum Bearing 35KG Stall Current(A) 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 Blocking is not allowed L Length (Approx.) 19mm/0.7in 22mm/0.8in 24mm/0.9in 26.5mm/1in 29mm/1.1in . Package List: 1 x Motor 1 x Wheel 1 x Bracket1 x Connection Cable1 x Coupling1 x Hex Wrench7 x Screw2 x Hex Socket Screw