Arc NdFeB Magnets

Arc NdFeB magnets are arc-shaped permanent magnetic materials specially for the motor industry. With precisely designed curved structure, multiple pieces can be assembled to form an annular magnetic field. They are widely adopted in various motors, generators, magnetic pumps, automotive motors and power components of intelligent equipment. Arc magnets perfectly matched to equipment structures can effectively optimize magnetic circuit design, cut energy consumption, and improve motor efficiency as well as stable power output.

Magnet Grades: Please refer to our full magnet grade performance datasheet.

Magnetization Direction: Customizable based on customers’ motor structure, magnetic circuit design and assembly requirements.

1. Material Composition

Arc NdFeB magnets are mainly composed of neodymium metal, pure iron and ferroboron, with the standard chemical formula Nd₂Fe₁₄B. Various metal elements are precisely blended according to different performance grades, then melted and refined via multiple precise metallurgical processes. The finished magnets feature stable magnetic performance and outstanding batch consistency.

2. Product Classification

NdFeB permanent magnets fall into two major types: sintered NdFeB and bonded NdFeB. All our arc magnets are produced with sintered NdFeB technology. Sintered NdFeB delivers far stronger magnetic performance than bonded alternatives, featuring powerful magnetic force, excellent demagnetization resistance and superior temperature tolerance. Widely recognized as the high-performance "King of Permanent Magnets", it is the top permanent magnet choice for the motor industry.

3. Manufacturing Process

Arc NdFeB magnets are manufactured through a full-set precision industrial workflow: Raw Material Batching → Melting → Powder Production → Oriented Compaction → High-Temperature Sintering → Precision Shaping → Magnetized Finished Products. Post-processing services including wire cutting, precision arc grinding, slicing, chamfering, drilling and electroplating are available per customer drawings. These processes ensure accurate arc curvature, tight dimensional tolerances and high fitting degree to fully satisfy all motor assembly standards.

4. Surface Anti-Corrosion Coatings

We provide comprehensive anti-corrosion coating solutions for diverse working environments such as motors, water pumps and outdoor equipment. Standard coating options include blue-white zinc plating, color zinc plating, nickel plating, Ni-Cu-Ni composite coating and baking paint. For harsh working conditions, customized premium finishes are available: epoxy coating, electrophoretic coating, phosphating, gold plating, silver plating and chrome plating. These coatings effectively protect magnets against oxidation and rust, making them suitable for humid, liquid, high-temperature and other complex operating environments.

5. Application Fields

They are widely used in permanent magnet motors, generators, automotive motors, magnetic pumps, fluid conveying equipment, industrial sensors, automated power equipment, new energy motors and other industries.