The Kpower HBL835 is a brushless digital servo for desktop robot arms, RC car models and positioning mechanisms. Its aluminum-alloy case and metal gears combine with a compact 40 × 20 × 38 mm footprint and 66 g weight. Torque is specified at 13.8 kg·cm at 6.0 V and 15.6 kg·cm at 7.4 V, with corresponding speeds of 0.12 and 0.10 s/60°.
Features
Brushless digital servo with an aluminum-alloy case.
High-precision metal gears and two ball bearings (2BB).
Potentiometer position sensing.
25T output spline with a 5.9 mm diameter.
120° travel range, with customization stated for the travel angle.
HBL835 version; classified as a high-torque model.
Specifications
Voltage-Specific Performance
Parameter
At 6.0 V
At 7.4 V
Torque
13.8 kg·cm
15.6 kg·cm
Speed
0.12 s/60°
0.10 s/60°
Mechanical and Electrical Specifications
Parameter
Value
Brand / model
Kpower HBL835
Servo type
Brushless digital servo
Nominal torque, voltage unspecified
15 kg·cm
Rated torque
3.5 kg; lever-arm unit unspecified
No-load speed, voltage unspecified
0.10 s/60°
Weight
66 g
Dimensions
40 × 20 × 38 mm
Travel angle range
120°; customizable
Operating voltage
4.8–8.4 V
Horn gear spline
25T, Ø5.9 mm
Gear material
Metal
Motor
Brushless
Listed protocols
PWM, TTL and RS-485; interface implementation for the offered configuration is unspecified
No-load current
4100 mA
Position sensor
Potentiometer
Case material
Aluminum alloy
Ball bearings
2BB
Working frequency
50–333 Hz
Operating temperature
−10 to 50 °C
Ingress protection rating
IP42
Applications
Desktop robot arms and STEAM education: build compact positioning mechanisms using the 120° travel range and 40 × 20 × 38 mm body.
1/5-scale RC car models: actuate control linkages using the metal gear train and voltage-specific torque and speed ratings.
Industrial valves and automation: drive limited-angle positioning mechanisms with potentiometer feedback and a 25T output spline.
Smart bidets: position mechanical elements using the compact brushless servo assembly.
UAV projects: actuate positioning mechanisms where the 66 g weight and specified operating range suit the design.
Underwater robot projects: use the compact servo in appropriately protected actuator assemblies. The servo is rated IP42, not for direct immersion.
Medical equipment and endoscope development: use the compact body and limited-angle motion for mechanical positioning tasks within an engineered device design.
The HBL835 is labelled as a brushless digital servo.The HBL series is described as using a high-torque brushless motor. The HBL series is described as using high-precision metal gears.Custom servo development graphic with housing, shaft, gear and connector examples
Specifications and Performance
The comparison table lists dimensions of 40 × 20 × 38 mm for HBL830, HBL833, HBL835, HBL836 and HBL838. The comparison table lists a weight of 66 g for HBL830, HBL833, HBL835, HBL836 and HBL838.HBL835 torque is specified as 13.8 kg.cm at 6.0 V. HBL835 torque is specified as 15.6 kg.cm at 7.4 V.General servo selection panel covering rotation, speed, voltage and dead band beside assorted motors
Additional Product Details
Five labelled servo horn shapes: flat, cross, round, star and single armODM development workflow from needs assessment and product design to tooling and mass production
Setup and Use
Servo pulse-width diagram relating five input pulse widths to output shaft anglesCLS88WP torque, speed and current chart at 7.4 V with operating-duty guidanceExploded servo anatomy with labelled components and a general servo-selection checklist
Interfaces and Connections
Three-wire servo connector diagram with brown ground, red power and orange signal leads
Application Examples
Kpower application grid covering robotics, automation, RC models, drones and other industries