Description
This Neodymium Disc Magnet with Countersunk Hole combines strength and precision for various applications. It features:
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Outer diameter: Ø20mm (0.79")
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Inner diameter (countersunk hole): Ø4.3mm (0.17")
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Height (thickness): 5mm (0.20")
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M4 thread for secure mounting with standard screws
Ideal for industrial, mechanical, and DIY uses, this magnet provides powerful magnetic force in a compact design, perfect for applications where reliable attachment and performance are needed. Its countersunk hole allows for easy integration into your projects with a flush finish. Contact us for bulk orders!
| name | Product Specifications | SI | C.G.S. |
|---|---|---|---|
| shape | |||
| diameter | D | 20mm | 2cm |
| omission | S | 8.6 mm | 0.86cm |
| Inner diameter | ID | 4.3 mm | 0.43cm |
| High | H | 5 mm | 0.5cm |
| screw | M | 4mm | 0.4 cm |
| Magnetization Direction | M | Axial direction | |
| surface treatment | NiCuNi | 12 μm | - |
| magnetic properties | |||
| surface magnetic flux density | B | 265.6 mT | 2656 Gauss |
| Suction power Adsorption power |
F | 4.97 kgf | 4974 gf |
| Operating point magnetic flux density |
Bd | 508.2 mT | 5082 Gauss |
| total flux | φo | 0.00015228 Wb | 15228 Mx |
| permeance coefficient | PC | 0.78pcs | - |
| Maximum operating temperature | Tw | 85 °C | 185 °F |
| Material property | |||
| Material symbol | neodymium | 35 | |
| Residual magnetic flux density | Br | 1170-1220mT | 11.7-12.2 kg |
| coercive force | Hcb | ≧868 kA/m | ≧10.9 kOe |
| Intrinsic coercive force | Hcj | ≧955 kA/m | ≧12 kOe |
| maximum energy product | BH | 263-287 kj/m3 | 33-36 MGOe |
| temperature coefficient | Br | -0.12 %/℃ | 31.78 %/°F |
| Hcj | -0.55 %/℃ | 31.01 %/°F | |
| Heatproof temperature | Tw | ≦80 ℃ | ≦176 °F |
| curie temperature | Tc | 310 ℃ | 590 °F |
| density | ρ | 7.5 kg/m3 | - |
| weight | Net | 0.0112 kg | 11.2g |
| remarks | |||
| REACH RoHS Directive | |||
Warning
This product is not a toy and is unsuitable for children. Designed for scientific and industrial use, it contains strong Neodymium magnets that can be harmful if swallowed. These magnets are brittle and may chip or break upon impact. Handle with care. Please review the Warnings page before ordering.
