ITEM NAME:Classic brushless sensorless 2838 4500KV 3.5Y à ¸ 3.17 mm RC 1/16 14 HIMOTO Z4F3 Classic brushless sensorless 2838 4500KV 3.5Y à ¸ 3.17 mm RC 1/16 14 HIMOTO Z4F3 High efficiency and perfect power transformation are the main features of the new CLASSIC Brushless Sensorless 1/12 1/16 1/18 motors characterized by a wide range of speed regulation, are compact and powerful, built with the best materials available in A newer version is designed to deliver quality and performance, reducing the heating problems to zero to fit the model's motorization to any type of circuit. There is a large selection of Rocket motors with gradual differences, they are equipped with a precious aluminum case T6 The rotor is assembled with double high precision bearing, the shaft is ï ¼Å¸3.17mm diameter. The engine case is closed with fixing screws for any operation. Product:3.5Y Max voltage: 12V MaxRPM:50000 Length of extend shaft:15mm Watts:600W Max amps:50A Length:38mm Shaft(mm):3.17mm Rotor Poles:4 Resistance:0.0455 Diameters:28mm Weight:95g Kv(RPM/Volt):4500KV 4Pole 12 Slot Hi-torque Motor Design CNC Machined 6061 T6 Billet Aluminum Heatsink Can High Purity Copper Windings Maximizes Efficiency High RPM ABEC5 Oversized Bearings Stator - Super Thin (0.2mm) Laminations Removable/Replaceable Rotor Precision Engineered for Maximum Energy Conversion Package Contents: 1 x brushless sensorless Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..High efficiency and perfect power transformation are the main features of the new CLASSIC Brushless Sensorless 1/12 1/16 1/18 motors. Shaft(mm):3.17mm. Length of extend shaft:15mm. Stator - Super Thin (0.2mm) Laminations.