Factory clearance original V1 powerful BLS-51B no packaging, hardware or servo arm. Smoother.Precision.More Reliable & More Efficiency Helical Gears for supreme strength and precision. ★Soft Start Protection
★Over Voltage Protection
★Low Voltage Protection
★Locked Rotor Protection
★Temperature Protection APPLICATION / SUITABLE | Ideal for 3D Airplane, Jet & 1/5、1/8th Monster / Crawler / Off-road Car & Helicopter. | ELECTRICAL SPECIFICATION (FUNCTION OF THE PERFORMANCE) | Torque At 6.0V | 46.2 kg-cm / 641.7 oz-in | | Torque At 7.4V | 55.7 kg-cm / 773.6 oz-in | | Torque At 8.4V | 62.9 kg-cm / 873.6 oz-in | | Speed At 6.0V | 0.12 sec / 60° | | Speed At 7.4V | 0.10 sec / 60° | | Speed At 8.4V | 0.09 sec / 60° | PROTECTION MECHANISM | Soft Start Protection | Soft start to neutral position. | | Over Voltage Protection | Over 9.0V drive the protection mode and 8.4V return to normal mode. | | Low Voltage Protection | Lower than 4.0V, drive the protection mode and 4.5V return to normal mode. | | Locked Rotor Protection | Stall in 5 sec, output torque goes down. | | Temperature Protection | Overheat 85 degree C, drive the protection mode and down 75 degree C return to normal mode. | POWER SUPPLY | Operating Voltage Range | 4.5V ~ 8.5V ( 4 ~ 6 Cell Ni-MH or 2S Li-Poly / 2S Li-Fe) | CONTROL SPECIFICATION | Control System | Digital Controller / AD 12-Bits ( 4096 Steps ) Frequency:Up to 333Hz / Neutral:1500us or 1520us | | Dead Band Width | 0.001ms ( 1us ) | MECHANICAL SPECIFICATIONS | Ball Bearing | Dual, Steel | | Gear | All Steel Alloy Metal Helical Gears | | Outside Case | Full One-Piece Aluminum CNC Casing | | Motor | High Efficiency Japan Brushless Motor | | Horn / Gear Spline | 25 Teeth ( Same as F-Type ) | PHYSICAL SPECIFICATIONS | Dimension (mm) | 40.5 x 21 x 38.5 mm / 1.59 x 0.83 x 1.52 in | | Weight (gram) | 84.0 ± 1 grams / 2.96 oz | | Product Picture / Dimension Sketch | .png) | Includes Servo and Servo Arm |