Magnet Assemblies

Custom Integrated Magnetic Solutions for Industrial Applications

Magnet assemblies are high-value-added integrated magnetic components that combine permanent magnet materials with auxiliary structural components such as metal hardware, plastic parts, and non-magnetic alloys. Compared with individual magnets, magnet assemblies provide greater flexibility in magnetic performance, mechanical integration, and installation.

TOPMAG provides an integrated range of services covering magnetic circuit design, material selection, precision machining, magnetization, assembly, and performance testing. We develop customized magnet assembly solutions for a wide range of industrial applications, supporting customers throughout the entire process from prototype development to mass production.

Product Categories

Browse by product type to quickly find the magnet assembly suited to your application. Our magnet assemblies cover a wide range of industrial applications and functional requirements and can be customized according to customer drawings, specifications, and application requirements.

Classification by Integrated Magnetic Material Type:

Technical Specifications

Customizable according to customer design requirements, typical parameters of mainstream assemblies are as follows.

Grades & Specifications of Magnet Assemblies

Parameter	NdFeB Assemblies	SmCo Assemblies	Alnico Assemblies	Ferrite Assemblies	Custom Note
Integrated Magnetic Material	N35-N52, SH/H/EH/UH	SmCo5, Sm2Co17	Alnico 5, Alnico 8	Y30-Y40	Customizable
Assembly Dimensional Tolerance	Manufactured according to drawing requirements				Customizable
Magnetic Field Positioning Accuracy	Specified according to drawing requirements				Customizable
Working Temperature Range	-40°C ~ 200°C	-40°C ~ 550°C	-40°C ~ 600°C	-40°C ~ 150°C	Optimizable
Mechanical Strength	Tensile ≥ 200 MPa, Compressive ≥ 800 MPa, Shear ≥ 80 MPa				Varies with material
Surface Treatment	Ni-Cu-Ni plating, Zn plating, epoxy coating	Passivation, optional epoxy coating	Passivation	No coating (standard)	Customizable
Magnetization Direction	Axial, radial, multi-pole, custom direction				According to structure
Environmental Adaptability	IP65 (standard), IP67/IP68 (custom)				Customizable
Vibration Resistance	Meets IEC 60068-2-6 (10-2000 Hz, 20 g)				Standard compliance
Service Life	≥ 100,000 hrs (normal); ≥ 50,000 hrs (harsh)				Depends on working conditions

Key Customization Options: Larger size customization (length ≤ 500mm, width ≤ 300mm), special waterproof/dustproof grades, and high-precision magnetic field calibration are available upon request.

Testing Standard: All assemblies undergo 100% performance testing before shipment, including magnetic field mapping, dimensional inspection, and environmental aging tests.

Engineering & Customization Capabilities

Magnet assembly performance depends not only on the magnetic material, but also on magnetic circuit design, mechanical structure, assembly precision, and operating conditions. TOPMAG provides integrated customization services covering material selection, magnetic circuit design, precision machining, assembly, and performance testing to achieve an effective balance between magnetic performance and structural requirements.

Fully Customized Design

According to customer drawings, samples or application requirements, the Chinese headquarters R&D team provides one-stop customized services including structural design, material selection, magnetization scheme and assembly process, adapting to the unique installation space, magnetic performance and working environment of different customers, and maximizing the matching degree with terminal equipment

Multi-Material Integration

Integrate different types of permanent magnetic materials (NdFeB for high magnetic performance, SmCo for high temperature resistance, Alnico for ultra-high temperature, Ferrite for cost-effectiveness) and auxiliary materials (stainless steel, copper, engineering plastics, titanium alloy, etc.), and optimize the combination scheme according to application scenarios to balance performance, cost and service life

High-Precision Assembly

TOPMAG uses CNC precision machining and controlled assembly processes to maintain the accuracy of critical components and assembly structures. Dimensional tolerances and magnetic field positioning accuracy can be defined according to individual component drawings and application requirements.

Integrated Performance Testing

The Chinese headquarters testing center conducts comprehensive performance testing on finished assemblies, including magnetic field distribution mapping, mechanical strength test, environmental adaptability test and service life simulation test, and issues a complete test report to ensure that each batch of products meets the technical standards

High Reliability & Stability

After assembly, the whole set of components undergoes aging test, temperature cycle test (-40°C~200°C), vibration test and corrosion resistance test, with failure rate lower than 0.1% in 10,000 hours of operation, adapting to harsh working environments such as high temperature, high humidity and strong vibration

One-Stop Service

TOPMAG provides integrated services covering technical consultation, magnetic circuit design, solution development, prototype production, small-batch manufacturing, and mass production, helping reduce communication and integration costs throughout the procurement and product development process.

Widely Applications

Relying on the advantages of customized design, multi-material integration and high-precision assembly, TOPMAG’s Magnet Assemblies are widely used in new energy, industrial automation, aerospace, medical equipment and other fields, providing core magnetic solutions for high-end manufacturing.

• New Energy Vehicles & Transportation——Core components such as drive motor rotor/stator magnetic assemblies, EPS (Electric Power Steering) system magnetic assemblies, battery cooling system magnetic components, adapting to the high vibration, high temperature and long-life requirements of new energy vehicles

• Industrial Automation & Robotics——Servo motor magnetic assemblies, linear motor magnetic assemblies, robotic arm joint magnetic components, magnetic positioning assemblies for automated production lines, ensuring high precision and high response speed of equipment

• Aerospace & Defense——Aircraft engine magnetic assemblies, satellite attitude control magnetic components, missile guidance system magnetic assemblies, with high temperature resistance, anti-radiation and high reliability characteristics

• Medical Equipment——Magnetic assemblies for MRI (Magnetic Resonance Imaging) equipment, medical pump magnetic components, diagnostic instrument sensor magnetic assemblies, with high magnetic field uniformity and low noise characteristics

• Consumer Electronics & Home Appliances——Magnetic assemblies for wireless charging modules, air conditioner compressor motors, refrigerator fan motors, cost-effective and stable performance

• Industrial Equipment & Machinery——Magnetic separators, magnetic pumps, magnetic couplings, magnetic brakes and other magnetic assemblies, adapting to harsh industrial environments such as high pressure, corrosion and dust

• Renewable Energy——Wind turbine generator magnetic assemblies, hydroelectric generator magnetic components, solar tracker magnetic assemblies, with high efficiency and long service life

Manufacturing & Quality Assurance

In line with TOPMAG’s global high-end magnetic product quality standards, guided by the Chinese headquarters, we implement a full-process strict quality control system for Magnet Assemblies (integrated high-value products), covering raw material procurement, component processing, assembly, testing and after-sales, to ensure that each assembly meets international industrial standards and customer customized requirements.

Process Step	Detailed Description
1. Raw Material & Auxiliary Component Control	The Chinese headquarters strictly selects qualified magnetic material suppliers and auxiliary component suppliers (metal/plastic), conducts incoming inspection on each batch of raw materials (magnetic performance, material composition) and auxiliary components (dimensional accuracy, mechanical strength), and only accepts products that pass the test.
2. Precision Processing & Assembly Control	Adhere to ISO 9001 and IATF 16949 quality management system standards, the Chinese headquarters uses CNC machining centers and automated assembly lines, and senior technicians monitor key assembly processes (bonding, clamping, magnetization) in real time to avoid assembly errors and ensure consistent product performance.
3. Comprehensive Finished Product Testing	Each batch of Magnet Assemblies is sent to the Chinese national-level magnetic testing center for full-item testing, including magnetic field distribution test, dimensional accuracy test, environmental adaptability test (high/low temperature, vibration, corrosion), mechanical strength test and service life simulation test. A detailed third-party inspection report is attached to each shipment.
4. Customized R&D & Technical Support	The Chinese headquarters has a professional R&D team integrating magnetic material research and structural design, which can optimize the assembly scheme according to customer application pain points, provide prototype trial-manufacture and performance verification, and ensure that the customized assembly fully meets the terminal application requirements.
5. Global After-Sales Service	Provide 24/7 technical support and after-sales service, the Chinese headquarters technical team can respond to customer quality feedback within 12 hours, provide on-site maintenance guidance for key customers, and replace unqualified products free of charge within the warranty period (1-3 years customizable).

Sample Center

We provide free Magnet Assemblies samples (only freight is charged) to help you verify product performance before mass purchase. Sample application process:

Process Step	Typical Timeline & Description
1. Submit Sample Request	Submit drawings or samples along with material, dimensions, magnetization, surface treatment, and application requirements.
2. Engineering Review	1–2 working days — Review requirements and confirm the assembly structure and technical specifications.
3. Sample Quotation	1–2 working days — Provide a quotation based on materials, machining, tooling, and assembly requirements.
4. Sample Production	5–15 working days — Produce samples according to the approved specifications; timing varies with assembly complexity and tooling requirements.
5. Testing & Feedback	After sample completion — Conduct application and performance testing with technical support from TOPMAG.
6. Mass Production	Lead time confirmed per project — Start mass production after sample approval and final specification confirmation.

Looking for a reliable Magnet Assemblies supplier? Contact TOPMAG now! We provide customized solutions based on your specific application requirements, including design, material selection, integration and performance optimization. Professional technical team, 24-hour online consultation, global logistics support.

Welcome to submit your product drawings or technical requirements and discuss your Magnet Assembly project with the TOPMAG technical team.

Note: Custom samples for special shapes/specifications may require a small mold fee, which will be refunded when placing a mass order (meeting the minimum order quantity).