The JX HV5921MG is a high-performance, high-voltage digital servo engineered for pilots who need exceptional torque, precision, and durability. Delivering 20.32kg/cm of torque at 8.4V, this servo is ideal for large-scale aerobatic models, powerful RC cars, boats, and any application demanding reliable high-torque output.

Featuring hard-anodised metal gears, a CNC-machined aluminium middle case, dual ball bearings, and a smooth coreless motor, the HV5921MG is designed for robust performance and long-term reliability. Its 25T spline and JR-style lead ensure easy compatibility with modern radio systems.

Hand-selected and flight-tested by Probuild Aircraft Ltd for large-scale aerobatic aircraft, this servo is trusted by experienced pilots who require dependable high-voltage performance.

Key Features

• High-performance digital high-voltage coreless servo

• Strong torque: 20.32kg/cm @ 8.4V

• Hard-anodised metal gear train for maximum durability

• CNC aluminium middle hull for improved strength & cooling

• Dual ball bearings for smooth, precise operation

• Fast response: 0.123 sec/60° @ 8.4V

• Standard-size servo with JR-style lead and plug

• 25T spline output shaft for wide compatibility

• Tested by Probuild Aircraft Ltd for large-scale aerobatic use

Perfect For

• Large-scale aerobatic aircraft

• Sport, 3D, and composite models

• High-performance RC cars and trucks

• Fast, powerful RC boats

• Any project requiring strong torque with smooth digital precision

Product Summary

The JX HV5921MG is a powerful and reliable high-voltage digital servo equipped with metal gears, a coreless motor, and dual bearings. Engineered for high-load applications such as large-scale aircraft, it provides outstanding strength, fast reaction times, and robust long-term performance.

Specifications

• Dead Band: 1µs

• Working Frequency: 1520µs / 330Hz

• Motor Type: Coreless motor

• Speed (6.0V): 0.152 sec/60°

• Speed (8.4V): 0.123 sec/60°

• Stall Torque (6.0V): 17.25kg/cm (239.55 oz/in)

• Stall Torque (8.4V): 20.32kg/cm (281.89 oz/in)

• Dimensions: 40.5 × 20.5 × 36.5mm (1.59 × 0.80 × 1.43 in)

• Weight: 59.3g (2.09 oz)

• Connector Wire Length: JR 265mm (10.43 in)

• Bearings: 2× Ball Bearings

• Spline / Tooth Count: 25T

Why Buy From Probuild Aircraft

• ✅ Official UK JX Stockist

• ✅ 100% Genuine Products

• ✅ Trusted by Top International Pilots

• ✅ Fast, Reliable UK Shipping

• ✅ Trusted by Pilots Since 1993