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)
N52 Neodymium Magnets for sale
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
powerful N52 Neodymium Magnets
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
powerful N52 Neodymium Magnets for sale
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.
Grade N52 Neodymium Magnets4
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.
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