BL57 57mm Diameter Brushless DC Motor- Suzhou Retek Electric Technology Co., Ltd.

The 57mm (NEMA 23 Equivalent) Industrial BLDC Platform

The 57mm diameter BLDC motor platform is a versatile industrial standard, roughly corresponding to the NEMA 23 frame size.

These motors are characterized by a balanced design, offering adequate torque and speed for general-purpose automation. They typically operate in the 24VDC to 48VDC range, delivering continuous power from 100W to 400W. The 57mm frame allows for effective integration of internal components, including Hall sensors or low-profile encoders, while maintaining a good surface area for passive heat dissipation. The slot/pole combination is optimized to minimize acoustic noise, making them suitable for office and lab automation environments.

Introduction

Detailed Parameters and Performance Data

RETEK: Standardized BLDC Solutions for Automation

Suzhou Retek Electric Technology Co., Ltd. provides the BL57 series as a core component for medium-load automation. This series is designed for straightforward drop-in replacement in systems currently utilizing NEMA 23 stepper or older brushed motors, offering immediate efficiency and dynamic response improvements. Our 57mm motors undergo stringent dimensional tolerance checks, guaranteeing repeatable fit and alignment in precision mechanisms. The focus of the BL57 line is delivering reliable performance with a long operational lifespan.

Applications

Advanced Technology Highlights

Typical Applications for BL57 (57mm) BLDC Motors

3D Printing and Additive Manufacturing: High-speed Z-axis and extrusion drives requiring faster acceleration than steppers. Challenge: Minimizing resonance within the machine structure.
Laboratory Automation: Positioning and dispensing equipment, requiring quiet operation and precise speed control.
Textile Machinery: Actuation for tensioners, feeders, and small cutting heads.
Small Conveyor Systems: Drives for lighter duty material handling and packaging lines.

Technical Specifications

Industrial & Commercial Usage

Technical Parameters (BL57 Series)

Parameter	Range / Typical Value	Unit
Outer Diameter	57	mm
Nominal Voltage Range	24 to 48	VDC
Rated Continuous Power	100 to 400	W
Torque Constant (KT)	0.08 to 0.2	Nm/A
No-Load Speed	3,000 to 8,000	RPM
Feedback Options	Hall Sensors, Incremental Encoder	Type

Additional Information

Supplementary Details & Notes

Integrated Production and Customization Workflow

The BL57 production line incorporates semi-automated winding and magnetization processes to ensure consistency across batches. We offer detailed reports on the electrical characteristics (Back EMF constant) for every large batch shipment.

Custom Shaft Features: Integrating flats, keyways, and precise output bores to match specific gearbox or coupling requirements.
Feedback Integration: Factory-installed incremental or absolute encoders, pre-aligned and tested for commutation accuracy.
Connector Tailoring: Offering M8 or M12 industrial connectors as alternatives to standard lead wires for robust field wiring.
Winding Optimization: Tailoring the windings to achieve higher torque (low KV) or higher speed (high KV) within the 24V or 48V envelope.

Service & Support

Technical Advantages and Core Design Features

NEMA 23 Compatibility: Standardized mounting dimensions simplify mechanical integration and conversion from legacy stepper motor systems.
Optimized Acoustic Performance: Careful selection of winding topology and component fit minimizes self-generated noise, suitable for noise-sensitive environments.
High Dynamic Response: Moderate rotor inertia allows for quick acceleration and deceleration, improving machine throughput compared to brushed alternatives.
Cost-Efficiency at Scale: Utilizing a highly standardized frame size allows for cost-optimized manufacturing and scalability.
Robust Bearings: Long-life, pre-lubricated ball bearings suitable for continuous high-speed industrial operation.

Frequently Asked Questions

Common Inquiries Regarding BL57 Motors

Q: Can the BL57 series operate in a closed-loop position control mode?
A: Yes. By integrating an incremental encoder, the BL57 motor can be seamlessly used with a servo drive to provide precise position and velocity control for demanding motion profiles.

Q: What is the benefit of using BLDC over a NEMA 23 Stepper in this size?
A: BLDC motors offer significantly higher speed capability and operate more efficiently, particularly at high speeds. They avoid the step loss issues and high heat generation associated with steppers when micro-stepping is used.

Q: How should I determine the optimal voltage (24VDC or 48VDC) for my application?
A: If the application requires higher speed or if current limitation is a concern, 48VDC is generally preferred as it draws half the current for the same power output. 24VDC is used when battery safety or existing power supply infrastructure is limited to that voltage.

Resources

Advanced Material Selection Guide

Housing: Cast aluminum alloy with precision-machined end caps to ensure thermal conductivity and alignment. Finish is typically black anodization for improved scratch resistance.

Shaft Material: Hardened 45# carbon steel is standard, providing a balance of strength and machinability. Stainless steel options are available for food or medical equipment.

Magnet Grade: Standard N42 or N45 NdFeB magnets are used, balancing cost and performance for general automation tasks.

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 BL57 57mm Diameter Brushless DC Motor Manufacturers and Wholesale BL57 57mm Diameter Brushless DC 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!

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Suzhou Retek Electric Technology Co., Ltd.

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