Magnet Advice: Choose the Right Material
At SAV-Webshop, we provide not only the most powerful magnets but also the best technical advice. The choice of material depends on factors such as temperature, environment, and required strength.
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Neodymium (NdFeB)
Neodymium magnets are the most powerful permanent magnets commercially available today. They are made from an alloy of Neodymium, Iron, and Boron.
- Advantages: Unmatched pull force at a very small size.
- Disadvantages: Corrosive without coating (nickel or zinc). Standard types lose strength above 80°C.
The Power of Neodymium: N35, N42, N52
When buying neodymium magnets, you often see codes like N35, N42, or N52. These numbers indicate the grade of the material. The higher the number, the stronger the magnet per volume.
| Grade | Strength (MGOe) | Application |
|---|---|---|
| N35 | 33 - 36 | Standard use, most economical. |
| N42 / N45 | 40 - 46 | Optimal balance between force and price. |
| N52 | 50 - 53 | Maximum power for industrial precision. |
Ferrite (Ceramic Magnets)
The most widely used magnets in the world. Ferrite magnets are non-conductive, ceramic materials made of iron oxide and barium or strontium carbonate.
- Advantages: Low cost, rust-proof, and heat resistant up to 250°C.
Factors Affecting Holding Force
The holding force in our webshop is measured under ideal conditions. In practice, three factors play a role: 1. Air gap, 2. Material thickness, 3. Shear force.