Kpower HBL835 Brushless Digital Servo, 15.6 kg·cm at 7.4 V, for Robot Arms and RC Cars

Kpower

$151.00 USD

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Version HBL835

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Overview

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.