• The letter “N” stands for Neodymium, indicating the magnet is an NdFeB (neodymium-iron-boron) type.
• The number following N (such as N35, N42, N52) represents the maximum energy product (BH)max. A higher number means a stronger magnet, capable of producing a greater magnetic field for its size.
• For example, N42 means the magnet has a maximum energy product of 42MGOe; N52 is 52MGOe, making it stronger than N42 or N35.

Practical Implications

• Higher N-value = stronger magnet.
• The most common grades in use are N42 for general applications (good balance of cost and strength) and N52 for maximum strength in compact spaces.
• We sell magnets in the range of N35, N40,N42, N45, N50 and N52

Example Table

In summary, the N value of neodymium magnets tells you how much magnetic energy the material can hold permanently, with higher values meaning stronger magnets.

The post What Does the N Value Mean? appeared first on A-Rating Magnets.

Wild as it may seem a magnet can be too strong for an application, such as door stays or product holders.

A magnet that is too strong may cause a more forceful close than necessary. It can also make opening more difficult.

If you are holding up an item in a cabinet or on a wall, you want just enough power to securely hold the item but not so much that it is difficult to remove, or worse, it is so strong that it attracts other metal objects in the vicinity.

The post How Strong Does a Magnet Have to Be appeared first on A-Rating Magnets.

Thick magnets such as cylinder magnets given their weight are not as effective in providing pull force as block magnets. Their thickness does not increase pull force in comparison to the thinner block and even disc magnets. The surface contact area is the critical factor in the utility of magnetism. The more surface area the more magnetic effect.

The post Block Magnets Maximize Pull Force appeared first on A-Rating Magnets.

Measuring the strength of small neodymium magnets can be done using various methods, and the most common approach involves using a gaussmeter or a magnetometer. Here’s a step-by-step guide to measuring the strength of small neodymium magnets:

Materials Needed:

1. Small neodymium magnet
2. Gaussmeter or magnetometer (preferably a digital model)
3. Non-magnetic surface (e.g., wooden table)
4. Tape measure or ruler (for some methods)

Steps:

1. Prepare the Environment: Find a location away from other magnets, electronic devices, and metal objects that could interfere with the measurements. Place the non-magnetic surface on a flat table or bench.
2. Zero the Gaussmeter (if applicable): Some digital gaussmeters may require zeroing or calibration before use. Follow the instructions provided by the manufacturer to perform this step.
3. Position the Magnet: Place the small neodymium magnet on the non-magnetic surface with the side you want to measure facing upward. Ensure it lies flat and is not tilted.
4. Position the Gaussmeter: Hold the gaussmeter close to the surface of the magnet, but avoid direct contact to prevent interference.
5. Read the Measurement: The gaussmeter will display the magnetic field strength in gauss (G) or tesla (T) units. The reading represents the magnetic flux density at the surface of the magnet.
6. Take Multiple Measurements: For more accurate results, take multiple measurements at different points on the magnet’s surface and calculate an average value.

Alternative Methods (Not as Accurate):

1. Lifting Force Test: You can estimate the strength of a small neodymium magnet by measuring the force required to lift a known weight. Attach the magnet to a non-magnetic surface, and then hang a small weight from it. Measure the weight that causes the magnet to detach from the surface.
2. Deflection Test: This method involves suspending a small neodymium magnet near a ruler and measuring the deflection or bending of the ruler caused by the magnetic force. This method is less accurate and should be used for rough estimations only.

Remember that measuring magnetic strength accurately can be challenging, especially for small magnets, and professional equipment like gaussmeters provides the most precise results. Additionally, neodymium magnets are strong, and care should be taken to avoid pinching or trapping fingers between magnets during measurement.

If you need precise magnetic strength measurements or have specific applications in mind, it’s advisable to consult with experts or testing laboratories with the appropriate equipment to get accurate and reliable data.



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The post How To Measure the Strength of Neodymium Magnets appeared first on A-Rating Magnets.

The shelf life of small neodymium magnets is virtually indefinite under normal storage conditions. Neodymium magnets are known for their exceptional stability and long-term durability, which makes them suitable for various applications, even when stored for extended periods.

If stored properly, neodymium magnets will retain their magnetic properties for many years. Here are some guidelines for storing small neodymium magnets:

1. Dry Environment: Store the magnets in a dry environment to prevent moisture from causing corrosion over time.
2. Room Temperature: Neodymium magnets are stable at typical room temperatures. Avoid exposing them to extreme heat or cold for extended periods, as this may affect their performance.
3. Avoid Mechanical Stress: Handle the magnets carefully to avoid chipping or breaking, as any physical damage can impact their magnetic properties.
4. Keep Away from Other Magnets: Neodymium magnets are strong and may attract or repel other magnets nearby. Store them separately to prevent unintended interactions that could cause damage.
5. Avoid Impact: Dropping or subjecting the magnets to impact can cause fractures, which may reduce their magnetic strength.

As long as the above precautions are observed, small neodymium magnets should remain fully functional for many years. It’s important to note that the strength of neodymium magnets is not influenced by time alone; they will retain their magnetic force unless subjected to adverse conditions or physical damage.

If you need to store neodymium magnets for an extended period before using them, consider keeping them in a sealed container or box to protect them from dust and moisture. Additionally, always keep them out of reach of children or pets, as swallowing small magnets can be hazardous.

If stored and handled following these guidelines, small neodymium magnets should retain their full magnetic strength for many years and possibly even decades. As a result, they are highly reliable for a wide range of applications, including industrial, commercial, and hobbyist uses.

The post How Long Do Neodymium Magnets Last appeared first on A-Rating Magnets.