• Black and gold Kpower HBL045 servo with a four-arm black horn attached, shown at an angle with mounting tabs visible.
  • Upright Kpower HBL045 servo showing the exposed splined output shaft, yellow model label, and slotted mounting tabs.
  • Angled view of the black and gold servo with its exposed metal output spline, broad gold side panel, and mounting tabs.
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Kpower HBL045 HV Brushless Digital Servo, 5.8 kg·cm at 7.4 V, for RC Aircraft and Helicopters

Kpower HBL045 HV Brushless Digital Servo, 5.8 kg·cm at 7.4 V, for RC Aircraft and Helicopters

Kpower

$109.00 USD
$109.00 USD
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Overview

The Kpower HBL045 is an HV digital servo with a brushless motor and metal gears for RC aircraft, helicopters, UAVs, robotics and industrial automation. Its 40 × 20 × 39.4 mm body weighs 65 g. Torque is specified at 4.5 kg·cm at 6 V and 5.8 kg·cm at 7.4 V, providing voltage-specific figures for selecting a servo for control-linkage and positioning tasks.

Features

  • Brushless motor with digital servo control.
  • Metal gear train and potentiometer position sensing.
  • Splined output shaft with a 25T, Ø5.82 mm horn interface.
  • Mounting flanges with four mounting holes.
  • Plastic and aluminum-alloy case with two ball bearings.
  • 120° travel range, with customization indicated.

Specifications

Voltage-Specific Torque and Speed

Parameter At 6 V At 7.4 V
Torque 4.5 kg·cm 5.8 kg·cm
Speed 0.06 sec/60 0.05 sec/60

The speed notation is sec/60; an angular unit is not specified.

Construction and Operating Parameters

Parameter Value
Brand / model Kpower HBL045
Servo type HV digital servo
Stall torque, listed unit 5.8 kg; voltage and lever-arm unit unspecified
Rated torque, listed unit 1.5 kg; voltage and lever-arm unit unspecified
No-load speed, without stated test conditions 0.03 s; voltage and angular interval unspecified
Weight 65 g
Dimensions 40 × 20 × 39.4 mm
Travel angle range 120°; customizable
Operating voltage 4.8–8.4 V
Horn gear spline 25T, Ø5.82 mm
Gear material Metal
Motor Brushless
Listed protocols PWM / TTL / RS-485
No-load current 3500 mA
Position sensor Potentiometer
Case material Plastic + aluminum alloy
Ball bearings 2BB
Working frequency 50–333 Hz
Operating temperature −10 to 50 °C
IP rating IP42

Applications

  • RC aircraft and 600H, 700H and 800H RC helicopters: actuate control linkages using a brushless, metal-geared servo with voltage-specific torque and speed figures.
  • UAVs: drive movable control mechanisms where the 65 g mass and 40 × 20 × 39.4 mm body suit the installation.
  • Robotics: position linkages or small mechanisms using potentiometer feedback and a splined output shaft.
  • Industrial automation: actuate positioning mechanisms using the four-hole mounting flanges and metal gear train.

Product Videos

Documents

Visual Details

Product Video

Application Examples

Kpower HBL045 HV digital servo with UAV, RC aircraft, robotics and automation panels
The Kpower HBL045 is labeled as an HV digital servo with a brushless motor. The HBL045 has a splined output shaft and mounting flanges with four mounting holes.
Kpower brand-level application grid for robotics, automation, RC models and other industries
Kpower application grid covering robotics, automation, RC models, drones and other industries

Features and Design

HBL-series brushless motor and exploded metal gear assembly
The HBL series uses a brushless motor described as high torque. The HBL series uses metal gears described as high precision.
Custom servo development examples covering housings, gearing, connectors and protocols
Custom servo development graphic with housing, gearing, connector and protocol examples
Exploded servo anatomy beside a generic component-selection checklist
Exploded servo component diagram beside a generic servo-selection checklist

Specifications and Performance

HBL045 voltage-specific torque and speed specifications with dimensions and gear detail
The HBL045 is an HV brushless servo. The HBL045 torque is 4.5 kg.cm at 6 V.
General servo selection reference for angles, speeds, voltages and dead bands
General servo selection reference for rotation angles, speeds, voltages and dead bands

Additional Product Details

Flat, cross, round, star and single-arm servo horn shapes
Flat, cross, round, star and single-arm servo horn shapes
ODM development workflow from requirements and design through sampling and production
ODM development workflow from requirements and product design through sampling and mass production

Setup and Use

Generic servo pulse-width diagram mapping 0.5–2.5 ms pulses to −90° through 90°
Servo pulse-width diagram mapping 0.5–2.5 ms pulses to shaft angles from −90° to 90°
CLS88WP speed and current versus torque chart at 7.4 V
CLS88WP speed and current versus torque chart at 7.4V with operating-mode guidance

Interfaces and Connections

Generic three-wire servo pinout with brown ground, red supply and orange signal
Three-wire servo connector pinout with brown ground, red Vcc and orange signal

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