Grade N52 Neodymium Magnets
Superior strength – Grade N52 magnets with high (BH)max and deep magnetic field.
Application fit – Ideal for strong holding, motors; weaker grades suit low strength.
Magnetic coupling – N52 provides maximum torque transfer for magnetic couplings.
Industry use – Applied in crawlers, medical devices, implants, surgical tools.
Looking for maximum holding power in a compact size? Our Grade N52 neodymium magnets deliver industry-leading energy product with verified pull-force tables, optional Ni/Epoxy/Zn coatings, and custom magnetization directions. We stock popular sizes (disc, block, ring) and ship IATA-compliant worldwide with fast sampling and flexible MOQs. (Related: What is an N52 neodymium magnet)
Grade N52 Neodymium Magnet Specifications & Pull Force Table
| Parameter | Specification / Description |
|---|---|
| Material Composition | Neodymium (Nd), Iron (Fe), Boron (B) — NdFeB |
| Grade | N52 (highest commercial grade) |
| Remanence (Br) | 1.42 – 1.48 Tesla (14,200 – 14,800 Gauss) |
| Coercivity (HcB) | ≥ 11,000 Oersted (Oe) |
| Intrinsic Coercivity (HcJ) | ≥ 20,000 Oe |
| Maximum Energy Product (BHmax) | 48 – 52 MGOe |
| Operating Temperature | Up to 80°C (176°F) — optional high-temp coating available |
| Density | 7.4 – 7.6 g/cm³ |
| Plating Options | Nickel–Copper–Nickel (standard), Zinc, Epoxy, or Gold |
| Shape Availability | Disc, Block, Ring, Cylinder, Sphere, Custom |
| Magnetization Direction | Axially or Diametrically magnetized |
| Tolerance | ±0.05 mm (standard) |
| Safety Note | Extremely strong — handle with care to avoid injury or damage |
⚙️ N52 Magnet Pull Force Reference Table
| Size (mm) | Approx. Pull Force (kg) | Common Uses |
|---|---|---|
| 10 × 2 | 1.6 kg | DIY, craft projects, sensors |
| 10 × 5 | 3.2 kg | Electronic fixtures, small mounts |
| 20 × 10 | 10.5 kg | Tools, magnetic holders |
| 25 × 10 | 15.2 kg | Speakers, magnetic locks |
| 40 × 20 | 35.0 kg | Motors, lifting equipment |
| 50 × 25 | 50.0 kg | Industrial machinery, magnetic clamps |
Coatings (Ni, Epoxy, Zn) & Corrosion Resistance
Neodymium magnets, including Grade N52, are made from a sintered NdFeB alloy that is naturally brittle and prone to oxidation. Without surface protection, the magnet can rust or lose performance when exposed to moisture, humidity, or salt spray.
To prevent corrosion and extend service life, N52 magnets are always coated or plated with a protective layer.
Comparison of N52 Magnet Coatings
| Coating Type | Corrosion Resistance | Appearance | Wear Resistance | Typical Thickness | Relative Cost | Recommended Application |
|---|---|---|---|---|---|---|
| NiCuNi (Nickel) | ★★★☆ (Medium–High) | Bright silver metallic | Medium | 10–20 μm | ★★☆ | General indoor use, motors, sensors |
| Epoxy (Black/Grey) | ★★★★ (High) | Black or grey matte | Medium–High | 15–30 μm | ★★★ | Outdoor use, humid or salt-spray environments |
| Zn (Zinc) | ★★☆ (Medium) | Dull silver | Medium | 5–10 μm | ★☆ | Dry environments, cost-sensitive projects |
Specification of N52 Neodymium Magnets
| Parameter | Value/Range | Notes |
|---|---|---|
| Grade | N52 (NdFeB) | Highest standard room-temp strength |
| Shapes | Disc / Block / Ring / Cylinder / Bar | Custom shapes available |
| Size Range | Discs: Ø5×1 mm – Ø50×30 mm; Blocks: 5×5×3 mm – 100×50×20 mm | Larger/custom per drawing |
| Dimensional Tolerance | ±0.05–±0.10 mm (by size/process) | Match with mating part tolerances |
| Magnetization | Axial / Diametral / Multi-pole (custom) | Axial default; confirm pole pitch for multi-pole |
| Surface Flux (at face) | Typically 3,500–6,000+ Gauss (size/shape dependent) | Provide test records on request |
| Pull Force (to low-carbon steel) | Varies by size (provide pull-force table) | Strongly affected by steel thickness, gap, finish |
| Coatings | NiCuNi / Epoxy / Zn / others | See coating comparison below |
| Working Temperature (recommended) | ≤ 80°C (standard N52) | Higher temps require high-temp grades (H/SH/…) |
| Curie Temperature | ~310–380°C | Irreversible demagnetization beyond limits |
| Polarity Marking | N/S marks / laser marking | Aids assembly & QC |
| RoHS/REACH | Compliance available | Include with shipment |
| Packaging | Spacers + anti-shock + magnetic shielding | Air/express compliant |
| Transport Compliance (IATA) | Shielding per 0.00525-gauss line requirement | Magnetic screening & documents available |
| MOQ | Typically 200–1,000 pcs | Sample runs supported |
| Lead Time | Stock 3–7 days; custom 7–20 days | Depends on spec/coating/qty |
| Pricing | Size/coating/qty dependent (tier pricing) | Instant quotes with specs |
| QC Items | Dimension / finish / coating thickness / magnetization / pull-force sampling | AQL or full inspection options |
Size of N52 Neodymium Magnets
| Spec (Example) | Shape | Magnetization | Coating | Working Temp | Typical Use | Notes |
|---|---|---|---|---|---|---|
| Ø10×2 mm | Disc | Axial | Ni / Epoxy | ≤80°C | Light holding, sensor triggers | High-runner |
| 50×25×10 mm | Block | Axial | Ni / Epoxy | ≤80°C | Jigs/fixtures, latches | Pinch hazard |
| Ø20×10 mm | Disc | Axial | Ni / Zn | ≤80°C | Heavy holding, magnetic filters | Add anti-corrosion care |
| Ø40×20 mm | Disc | Axial | Epoxy | ≤80°C | Magnetic coupling, crawlers | Use thick steel backer |
| Ø50×30 mm | Disc | Axial | Ni | ≤80°C | Very high pull | Use handle/release tool |
Coating Comparison of N52 Neodymium Magnets
| Coating | Corrosion Resistance | Appearance | Wear Resistance | Typical Thickness | Cost | Best For |
|---|---|---|---|---|---|---|
| NiCuNi (Nickel) | Medium | Bright metallic | Medium | 10–20 μm | Base | General use, clean look |
| Epoxy | High | Black/grey | Med–High | 15–30 μm | Slightly higher | Humid/salt-spray/outdoor |
| Zn (Zinc) | Low–Med | Silvery | Medium | 5–10 μm | Slightly lower | Cost-sensitive indoor use |
| Phosphate / Others | Depends | Grey/black | Medium | 5–15 μm | Custom | Pre-bonding/overmolding prep |
Great Choice For Many Applications.
They have a high (BH)max value, which means they have an extremely strong magnetic field strength. This makes them ideal for use in devices where you need to hold something in place with a strong adhesive force. Because of their high magnetic field strength, N52 magnets are also great for preventing wear and tear on motors and other moving parts.
But just because they have a high (BH)max value doesn’t mean that they’re the best option for every application. If you’re trying to make something don’t need high magnetic strength, you might want to choose another magnet grade—like N35 or even N45—because those grades have lower magnetic strength than N52 does.
N52 Neodymium Magnets Are Widely Used In Many Industries
Magnetic Coupling
The magnetic couplings are permanent-magnetic couplings transmitting the torque without contact through magnetic forces between two magnetic rotors(with magnets on there). Therefore, the magnetic strength of the coupling magnet becomes the key. And N52 is the best chocie.
Magnetic Crawlers
A magnetic crawler is a device designed to move across the surface of a material using the force of magnetism. It consists of a motor, a big neodymium magnet (in most cases, that is N52), and a flexible belt that moves over the surface of the material.
Medical Equipment
The Grade N52 neodymium magnet is a medical-grade magnet that can be used in a variety of applications. These include use in surgical instruments, medical implants, and other types of devices that require strong magnetic forces. Most micro neodymium magnets in minimally invasive surgery are N52.
Refer: wiki
Related: N42 Vs N45 Vs N52 Magnet
N52 magnets are significantly stronger than N42 and N35.
Compared to N35, N52 can produce about 50% more magnetic energy, and around 15–20% more than N42. This higher grade means stronger pull force and higher flux density in the same size magnet.
N52 magnets typically operate safely up to about 80°C (176°F). Beyond this temperature, their magnetic strength begins to drop noticeably.
Choose by environment: Ni (NiCuNi) for general indoor/decorative use, Epoxy for humid/marine/outdoor environments, Zn for cost-sensitive, dry applications.
Yes — you can ship N52 magnets by air, but only if the packaged shipment meets IATA/air-carrier magnetic-field limits and labeling/packaging rules.
