Overview of Neodymium Magnets

Neodymium iron boron (NdFeB) magnets possess high energies ranging from 8MGOe to 50+ MGOe. As the third generation of rare earth permanent magnets, NdFeB products are less expensive, mechanically stronger and less brittle than samarium cobalt (SmCo). Because NdFeB magnets are prone to oxidation, coating or plating the magnets is recommended. Neodymium magnets must be licensed for import into the United States and Canada whether they are bare magnets or part of an assembly. Unlicensed neodymium is readily available in the marketplace, so buyer beware. Neomax is currently pursuing litigation against a number of US companies. Is your supplier licensed?

Advantages

• Highest energy for size
• High Hc and Hci output
• Excellent performance in ambient temperature situations
• More cost effective than samarium cobalt

Disadvantages

• Working temperature is below 200C
• Prone to oxidation

Applications

NdFeB magnets are used in audio, magnetic couplings, power generators, reed switch applications, sensors, DC motors, automotive starters, servomotors, and a multitude of other applications.

AMI#	Grade	OD	ID	Height	Length	Width	Thickness
M-10132	35	.125		.125*
M-10050	35	.250		.500*
M-10051	38SH	.866		.394*
M-10100	35	.375		.500*
M-10101	35	.177*		.098
M-10102	35	.250		.750*
M-10103	35	.375		.750*
M-10105	35	.500		1.00*
M-10107	30SH	1.50		1.00*
M-10118	43	.250		.200*
M-30001	35				2.00	2.00	.25*
M-30004	35				.250	.250	.125*
M-30006	35				.875	.375	.125*
M-30116	35				.225	.125	.500*
M-30117	35				.225	.225	.500*
M-30121	45				1.00	1.00	.500*
M-70010	35	.400	.125	.125*
M-70017	35	.600	.125	.125*

*Indicates direction of orientation

NdFeB parts are usually offered with nickel plating. Other plating options are available upon request.

MQP® is a registered trademark of Magnequench, Inc.
Vakodym® is a registered trademark of Vacuumschmelze, Inc.