KingMax BLS02S Brushless HV Waterproof Servo – 39kg High Torque Digital Servo
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KingMax BLS02S Brushless HV Waterproof Digital Servo
The KingMax BLS02S is a premium high-performance digital standard servo designed for demanding RC aircraft applications requiring exceptional torque, durability, and precise control. Featuring a powerful brushless motor, waterproof construction, full CNC aluminum case, and high-precision steel gears, the BLS02S delivers up to 39kg-cm (541.71 oz-in) of torque while maintaining fast response times and excellent centering.
The innovative patented gear chain design improves stability and durability under high loads, making this servo an excellent choice for giant-scale aircraft, aerobatic models, large warbirds, sport jets, and other demanding control surface applications.
Features
- High-performance digital standard servo
- Patented gear chain design for improved stability and durability
- High-precision Taiwan-made steel gears
- High-quality brushless motor
- Full CNC aluminum hull and structure
- Dual ball bearings (2BB)
- Waterproof construction
- Standard 25T spline
- Wide voltage operation from 5.0V to 8.4V
Servo Arm Compatibility
The BLS02S uses a standard 25-tooth output spline. We have verified compatibility with Futaba-style 25T servo arms and accessories, including most aftermarket aluminum, carbon fiber, and composite servo arms designed around the popular 25T standard.
Speed & Torque Performance
| Voltage | Speed | Torque |
|---|---|---|
| 5.0V | 0.16 sec/60° | 24kg-cm (333.36 oz-in) |
| 6.0V | 0.13 sec/60° | 29kg-cm (402.81 oz-in) |
| 7.4V | 0.10 sec/60° | 37kg-cm (513.93 oz-in) |
| 8.4V | 0.09 sec/60° | 39kg-cm (541.71 oz-in) |
Specifications
| Model | BLS02S |
| Servo Type | Digital Standard Servo |
| Gear Train | High-Precision Taiwan-Made Steel Gears |
| Motor | Brushless Motor |
| Case Construction | Full CNC Aluminum Hull and Structure |
| Patent | Patent Gear Chain Design (Patent No. ZL201822045200.5) |
| Bearings | Dual Ball Bearings (2BB) |
| Spline | Standard 25T |
| Dead Band | 2μs Default |
| Waterproof | Yes |
| Operating Voltage | DC 5.0V–8.4V |
| Rated Working Voltage | DC 7.4V |
| Working Frequency | 1520μs / 330Hz |
| Working Angle | ±63° @ 800μs–2200μs |
| Dimensions | 40 × 20 × 33.5mm (1.56 × 0.78 × 1.30 in) |
| Weight | 75g (2.64 oz) |
| Connector | JR Connector |
| Wire Length | 320mm (12.48 in) |
| Working Temperature | -10°C to +50°C (14°F to 122°F) |
| Storage Temperature | -20°C to +60°C (-4°F to 140°F) |
Recommended Applications
- 50cc–85cc gas-powered RC aircraft
- Large giant-scale sport aircraft
- IMAC and aerobatic aircraft
- Large warbirds
- Sport jets and turbine aircraft
- High-load elevator installations
- Large rudder applications
- Heavy-duty aileron installations
- Scale aircraft requiring high holding power and precision centering
Why Choose the BLS02S?
- Up to 541.71 oz-in (39kg-cm) of torque at 8.4V
- Brushless motor for long life and high efficiency
- Patented gear chain design for improved stability and durability
- High-precision steel gears for heavy-duty applications
- Waterproof construction for demanding field conditions
- Full CNC aluminum construction for strength and heat dissipation
- Compatible with verified Futaba-style 25T servo arms and accessories
- Excellent centering and holding power for precision flight control
Includes
- KingMax BLS02S Brushless HV Waterproof Digital Servo
- Manufacturer-supplied servo accessories
- SKU BLS02S