Ring-shaped neodymium magnet NR series

Brand :

NIROKU

Caution

The product images are representative only. Specifications may vary by part number, including shape and color.
Due to export restrictions on rare earths in China, orders will be suspended once current stock runs out. Please note that even for large quantity quotations, delivery times may remain undetermined.

Product Description

A rare-earth magnet with the highest magnetic energy among the existing magnets.
[Features]
· Ring type magnet
· Not much cracking or chipping and high mechanical strength
· Because of low temperature characteristics, the usage conditions for standard products are below 80°C.
· If it is a heat resistant type with improved coercivity, it can be used in high temperature ranges up to about 220°C.
· All products are surface-treated with nickel plating, etc., to be rust-resistant.
[Applications]
· Widely used for motors, iron powder removal, sensors, medical equipment, etc.
· Ideal for prototyping in small lots, etc.

Product Specification

Neodymium magnet ring-type product image 02

Neodymium magnets are shaped and sintered products whose main components are neodymium, iron and boron.
The exceptional magnetic energy is the highest among the existing magnets.

Magnetic Properties

Material Name	Residual magnetic flux density	Coercive Force	Coercive Force	Maximum energy product
	Br	bHc	iHc	(BH) max
	T	kA/m	kA/m	kJ/m³
N-35	1.17 to 1.25	≥ 859	≥ 955	263 to 295
N-40	1.25 to 1.32	≥ 859	≥ 955	302–334
N-42	1.28 to 1.35	≥ 859	≥ 955	318 to 350
N-35H	1.17 to 1.25	≥ 860	≥ 1353	263 to 295
N-30SH	1.08 to 1.17	≥ 796	≥ 1592	223 to 255
N-40SH	1.23–1.32	≥ 907	≥ 1592	287 to 334
N-30UH	1.08 to 1.17	≥ 796	≥ 1990	223 to 255

*The values in the above table are representative values and are not quality guaranteed values.

Physical Properties

Series Name	Temperature coefficient (Br)	Density	Curie Temperature	Vickers Hardness	Operating temperature *
Series Name	%/°C	g/cm³	℃	HV	℃
N series	-0.12	7.3 to 7.5	310	500-600	80
N-H series	-0.11	7.3 to 7.5	310	500-600	120
N-SH series	-0.1	7.3 to 7.5	310	500-600	150
N-UH series	-0.1	7.3 to 7.5	310	500-600	180

*The values in the above table are representative values and are not quality guaranteed values.

Usage Example

Allows for the creation of magnetic circuits using neodymium magnets.

Product Feature Details

Ring-type neodymium magnet [1 to 3 pieces] product features detail 01_Magnetization in thickness direction image

Magnetization Direction: Y-direction

Ring-type neodymium magnet [1 to 3 pieces] product features detail 02_Magnetization in radial direction image

Magnetization Direction: Radial (NR078 only)

Cautions and Prohibitions

There is a risk of injury, such as fingers getting pinched, if the magnet adheres to each other, tools, or iron pieces.
If the magnets are accidentally attracted, fix one magnet and move the other to the side. This method makes it relatively easy to remove.
At this time, if tools are used, the magnet may be cracked or chipped.
Magnets are generally fragile, and neodymium magnets tend to corrode from the damaged surface.
Also, there is a risk of injury from these fragments.
Keep magnets out of reach of children. If you accidentally swallow a magnet, contact your doctor immediately.
People with metal allergies may experience itching or redness if they come into contact with magnets.
If you experience any of these symptoms, do not touch the magnet.
If the magnet comes into direct contact with water, its components may leach out. Never drink this water.
Bringing a magnet close to a credit card, cash card, etc., may render it unusable.
Bringing magnets close to precision equipment such as PCs, smartphones, watches, etc., may cause malfunction.
Placing a magnet close to an electronic medical device such as a cardiac pacemaker may impair its normal operation.
Demagnetization may occur if the magnet is used outside the operating temperature range.
Applying a strong impact to the magnet or processing it may demagnetize it.
Excessive bending of rubber magnets with a thickness of 2 mm or more may cause cracks.