Planetary Geared Brushless Dc Motor BL42 42mm BLDC Geared Motor- Suzhou Retek Electric Technology Co., Ltd.

BL42 Planetary Geared Motor: Power Density and Precision Reduction

The BL42 Planetary Geared Brushless DC Motor integrates a high-efficiency 42mm BLDC motor with a co-axial, high-efficiency planetary gearbox.

This combination is engineered to deliver high torque and precise speed control in a compact, reliable package. Planetary gearheads are favored for their high torque transmission capacity and low backlash relative to their size, making them ideal for precision positioning and high-duty-cycle applications. The BLDC motor provides the efficiency and longevity benefits (no brushes to wear out), while the gearhead steps the speed down and multiplies the torque output significantly, making it suitable for loads that require force rather than speed.

Introduction

Detailed Parameters and Performance Data

RETEK: Integrated Drive Solutions for Advanced Robotics

Suzhou Retek Electric Technology Co., Ltd. specializes in creating optimized geared motor packages. For the BL42, we focus on precisely matching the motor's output speed and torque characteristics to the gearbox's rating, ensuring maximum system lifespan and efficiency. The integrated Hall sensor feedback from the BLDC motor is used for accurate commutation and speed control, delivering a high-performance, maintenance-free drive unit.

Applications

Advanced Technology Highlights

Precision Geared Applications for BL42 BLDC Motors

Small Robotic Joints: Actuators for light industrial or collaborative robot joints requiring high torque and zero maintenance. Challenge: Minimizing backlash for high positional accuracy.
Medical Actuators: Motors for patient handling equipment, surgical tables, and linear drives requiring high force and reliability.
CNC Tool Changers: Drives requiring high torque to lock and unlock tool holders.
High-Precision Feed Mechanisms: Actuators for industrial automation feed systems and indexing tables.

Technical Specifications

Industrial & Commercial Usage

Technical Parameters (BL42 Geared Motor)

Parameter	Range / Typical Value	Unit
Motor Diameter	42	mm
Gearbox Type	Planetary	Type
Max Continuous Torque	Up to 10	Nm (at gearbox output)
Reduction Ratio Options	3:1 to 100:1	Ratio
Backlash (Standard)	<3∘	Arc-Minutes

Additional Information

Supplementary Details & Notes

Service & Support

Technical Advantages and Core Design Features

High Power Density: Planetary gearheads concentrate high torque in a small, co-axial package, maximizing the force output per unit volume.
Long, Maintenance-Free Life: The BLDC motor eliminates brush wear, and the gearbox is permanently lubricated, resulting in minimal servicing requirements.
Low Noise Operation: Precision-cut planetary gears and the quiet running of the BLDC motor ensure minimal acoustic noise.
High System Efficiency: The combined efficiency of the BLDC motor and the planetary gear stages (typically ∼90% per stage) is significantly higher than worm gear alternatives.
Feedback Integration: Hall sensor feedback is standard for motor commutation, and external encoders can be added for high-precision positioning.

Frequently Asked Questions

Common Inquiries Regarding BL42 Geared Motors

Q: Why is backlash important in a geared motor?
A: Backlash is the mechanical slop or free play at the gearhead output. For precision positioning, low backlash is critical as it directly affects the system's positional accuracy and repeatability, especially when the load reverses direction. Planetary gearheads are designed to minimize this.

Q: What is the maximum safe load for the gearbox?
A: Gearboxes have both a rated continuous torque (based on thermal and wear limits) and a peak intermittent torque (based on material strength). The application load should stay below the continuous rating for long life, or briefly peak below the intermittent rating.

Q: Can I use a single motor for two different reduction ratios?
A: Yes. The BL42 motor can be coupled to different gearbox ratios (e.g., 10:1 vs. 50:1) to meet diverse output speed/torque needs across a single product line, simplifying spare parts inventory.

Resources

Advanced Material Selection Guide

Gears: High-strength, case-hardened steel gears (or precision-machined plastics for low-torque, low-noise versions) are used in the planetary stages to ensure maximum wear resistance.

Output Bearings: Heavy-duty, large-span output bearings are used to handle the high radial and axial forces often imposed by the final drive mechanism (e.g., belt tension, rack-and-pinion).

About Suzhou Retek Electric Technology Co., Ltd.

Unlike other motor suppliers, Retek engineering system prevents the selling of our motors and components by catalogue as every model is customized for our customers. The customers are assured that every component they receive from Retek is designed with their exact specifications in mind. Our total solutions are a combination of our innovation and a close working partnership with our customers and suppliers.

As China Planetary Geared Brushless Dc Motor BL42 42mm BLDC Geared Motor Manufacturers and Wholesale Planetary Geared Brushless Dc Motor BL42 42mm BLDC Geared Motor OEM/ODM Suppliers, Retek business consists of three platforms: Motors, Die-Casting and CNC manufacturing and wire harness. Retek products are widely supplied for residential fans, vents, boats, airplanes, medical facilities, laboratory facilities, trucks and other automotive machines.

Welcome to send us an RFQ, it is believed you will get the best cost-effective products and services here!

Customized Solutions

Quality Assurance

Global Export

Suzhou Retek Electric Technology Co., Ltd.

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BL42 Planetary Geared Motor: Power Density and Precision Reduction

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