HB55KG 55KG Brushless Waterproof Digital Servo for Heavy Duty
55kg·cm waterproof IP67 brushless digital servo, metal gear, aluminum housing, 6.0-8.4V, 3BB. Ideal for 1/8 1/10 RC crawlers, cars, robots and boats.
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Description
The HB55KG 55KG Brushless Waterproof Digital Servo for Heavy Duty delivers 55kg·cm, running on 6.0-8.4V.
It is built with a Metal Gear train, Aluminum Housing case, 3BB, ip67 construction, 75g weight, 40x20x37mm body, JR JST 300mm connector as standard.
A brushless motor removes the brushes entirely, which means less internal wear and more consistent torque over a long service life.
This is a high-voltage servo: it reaches full rated torque on 2S LiPo or a 7.4–8.4V BEC, and it will still run on 6.0V with reduced torque. Check the BEC rating of your ESC before you connect it.
Operating angle is available in 180°/270°/360° Optional, so the same body can be ordered for standard control-surface work or for winch and robot-joint applications that need more than 180°.
This is large-scale territory: 1:5 vehicles, industrial robot joints and UAV applications that need strong holding torque and a fast transit time.
Ordering for a build or a distribution line? Tell us the torque, voltage range and connector you need and we will quote it. See also the full Yadovex range and our guides on choosing 6S long-range motors and 7-inch vs 9-inch propulsion.
Key specifications
| Torque | 55kg·cm |
| Voltage Range | 6.0-8.4V |
| Operating Angle | 180°/270°/360° Optional |
| Motor Type | Brushless Motor |
| Gear Material | Metal Gear |
| Case Material | Aluminum Housing |
| Bearing | 3BB |
| Waterproof Rating | IP67 |
| Weight | 75g |
| Dimensions | 40x20x37mm |
| Connector | JR JST 300mm |
The BL55KG brushless digital servo delivers 55kg·cm of torque with a waterproof IP67 high-speed design, engineered for 1/8 and 1/10 scale crawler trucks, RC cars, robots and boats. It features stainless steel gears, a full CNC aluminum housing and triple ball bearings (3BB) for smooth, stable operation even under long high-frequency use.
Magnetically programmed with an ultra-low 1usec dead band, it supports control angles of 180°/270°/360° and provides precise, linear control.
Specifications
- Model: BL55KG
- Ball Bearing: 3BB
- Driver Type: MOS Drive
- Motor Type: Brushless motor
- Potentiometer Type: Direct Drive
- Amplifier Type: Digital Control
- Dead Band Width: 1 usec
- Gear Material: Metal Gear
- Housing Material: Aluminum Housing
- Operation Voltage Range: 6.0-8.4V
- Operation Temperature Range: -20°C ~ +60°C
- Control Angle: 180°/270°/360° Optional
- Direction: Re-clockwise / Pulse Travel 500→2500 usec
- Control System: PWM Control (center point 1500 usec)
- Cycle Life: More than one million times without load
- Operation Travel: 60°±1
- Limit Angle: 180°±1 / 270°±1 selectable
- Dimensions: 40 x 20 x 37 mm
- Weight: 75g (without servo horn)
- Connector Wire Length: 300mm, JR JST plug
- Connector Wire Gauge: 22AWG
This product is intended for lawful use only (aerial photography, agriculture, industrial inspection, education, and recreational FPV / RC applications). Please check and comply with all applicable local, national, and international laws and regulations in your country/region before purchase and use, including drone, aviation, export, and import regulations.
By purchasing, you confirm the product will be used for legal purposes only. Yadovex reserves the right to decline orders that we believe may be used for prohibited purposes. For our full policy, see our Disclaimer and Compliance & Export Control Policy.
Related models and guides
Same series: HB25KG 25KG Brushless Wate | HB35KG 35KG Brushless Wate | HB45KG 45KG Brushless Wate
Browse: Brushless Waterproof Servos | all RC servos
Related ranges: brushless waterproof servos | robot arm and bionic hand servos | micro servos
Read: Brushless vs Brushed Motors for Drones
Frequently asked questions
What torque does the 55kg servo deliver?
It is rated at 55kg-cm. This is large-scale territory: 1:5 vehicles, industrial robot joints and UAV applications.
What voltage does this servo need?
It runs 6.0-8.4V. Check that your BEC or receiver pack can supply the stall current before you install it.
Is this servo waterproof?
Yes, it is rated IP67, which makes it suitable for cars, boats and outdoor robots.
Do you supply these servos in bulk?
Yes. We supply samples for validation and then repeat bulk orders with custom wiring, connectors and OEM packaging.
Related products in this range
D5545GS 45KG Coreless Waterproof Digital Servo for RC Models | DC5515 15KG Waterproof Digital Servo for RC Cars & Boats | DC5525 25KG Waterproof Digital Servo for RC Cars & Boats
Additional information
| Torque | 55kg·cm |
|---|---|
| Voltage Range | 6.0-8.4V |
| Operating Angle | 180°/270°/360° Optional |
| Motor Type | Brushless Motor |
| Gear Material | Metal Gear |
| Case Material | Aluminum Housing |
| Bearing | 3BB |
| Waterproof Rating | IP67 |
| Weight | 75g |
| Dimensions | 40x20x37mm |
| Connector | JR JST 300mm |
Quick Comparison
| HB55KG 55KG Brushless Waterproof Digital Servo for Heavy Duty remove | MG35KG 35KG 180° High Torque Full Steel Gear Digital Servo for RC Car remove | DC5525 25KG Waterproof Digital Servo for RC Cars & Boats remove | MG90S 14g Micro Servo for Robot Arm & RC Models remove | HB8070GS 70KG High Voltage Brushless Waterproof Digital Servo remove | MG25KG 25KG 180° High Torque Metal Copper Gear Digital Servo for Robot Arm remove | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Name | HB55KG 55KG Brushless Waterproof Digital Servo for Heavy Duty remove | MG35KG 35KG 180° High Torque Full Steel Gear Digital Servo for RC Car remove | DC5525 25KG Waterproof Digital Servo for RC Cars & Boats remove | MG90S 14g Micro Servo for Robot Arm & RC Models remove | HB8070GS 70KG High Voltage Brushless Waterproof Digital Servo remove | MG25KG 25KG 180° High Torque Metal Copper Gear Digital Servo for Robot Arm remove | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| SKU | BL55KG-55KG | MG35KG-35KG | DC5525-25KG | MG90S-14g | HB8070GS-70KG | MG25KG-25KG | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Description | 55kg·cm waterproof IP67 brushless digital servo, metal gear, aluminum housing, 6.0-8.4V, 3BB. Ideal for 1/8 1/10 RC crawlers, cars, robots and boats. | 25kg·cm waterproof digital servo, metal gear, aluminum case, 4.8-8.4V, 0.08s/60° @8.4V. Ideal for 1/8 RC cars, crawlers, aircraft, boats and robot arms. | 70kg·cm high voltage brushless digital servo, metal gear, aluminum case, 10-15V, waterproof magnetic design. Ideal for RC cars and UAVs. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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