Ring-shaped neodymium magnet NR series
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 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 |
Physical Properties
| Series Name | Temperature coefficient (Br) | Density | Curie Temperature | Vickers Hardness | Operating temperature * |
|---|---|---|---|---|---|
| %/°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 |
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](http://content.misumi-ec.com/image/upload/t_msmwm_wyg/v1/p/jp/product/wysiwyg/221005686965/221005686965_002_20230801115855.jpg)
Magnetization Direction: Y-direction
![Ring-type neodymium magnet [1 to 3 pieces] product features detail 02_Magnetization in radial direction image](http://content.misumi-ec.com/image/upload/t_msmwm_wyg/v1/p/jp/product/wysiwyg/221005686965/221005686965_003_20230801115855.jpg)
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.