Bonded Rare Earth Magnets

Technomag Inc. manufactures bonded rare-earth magnets in various sizes and specifications. We meet the highest quality standards set by MMPA (Magnetic Materials Producers Association).

Applications

Bonded rare earth magnets are used in a wide range of applications due to their high strength and design flexibility. Common uses include BLDC motor rotors, speedometers, magnetic buzzers, and magnet rollers in devices like printers and copiers. They are also found in consumer electronics, medical devices, industrial automation, and automotive systems, especially where compact and precise magnetic components are required.

Key Features

• Material Composition: Rare earth powder (NdFeB or SmCo) + polymer or resin binder.
• Manufacturing Methods: Injection molding, compression bonding, or extrusion.
• Magnetic Strength: Stronger than bonded ferrites, weaker than sintered rare earth magnets.
• Shapes & Complexity: Easily formed into complex, thin-walled, or custom shapes.
• Mechanical Properties: Tougher and more machinable than sintered magnets; resistant to cracking.
• Magnetic Orientation: Isotropic or anisotropic, depending on manufacturing process.

Composite Specification

Neodymium + Nylon 12- Isotropic

Bonded Neodymiun-Iron-Boron Properties
Properties	Unit	Test Method	Specification
Br	G	BH Curve Tracer	5200-7000
BHc	Oe	BH Curve Tracer	4000-6400
IHc	Oe	BH Curve Tracer	7000-13400
Bhmax	Mgoe	BH Curve Tracer	5.5-11.9
Specific Strength		ASTM D-792	4.9-5.5
Melt Flow Rate	G/10 min	ASTM-1238	50-125
Flexural Strength	Kgf/cm2	ASTM-790	800-980
Impact Strength IZOD	Kgf/cm/cm2	ASTM-256	8-14

Samanium Cobalt + PPS – Anisotropic

Bonded Samarium Cobalt (Sm2Col7) Properties
Properties	Unit	Test Method	Specification
Br	G	BH Curve Tracer	5200-6700
BHc	Oe	BH Curve Tracer	4960-6000
IHc	Oe	BH Curve Tracer	10900-11300
Bhmax	Mgoe	BH Curve Tracer	6.8-11.0
Specific Strength		ASTM D-792	5.0-5.9
Melt Flow Rate	G/10 min	ASTM-1238	30-50
Flexural Strength	Kgf/cm2	ASTM-790	665-875
Impact Strength IZOD	Kgf/cm/cm2	ASTM-256	8-12