Neodymium magnets – most powerful on the market

Want to buy really powerful magnets? Our range includes rich assortment of various shapes and sizes. Best choice for domestic applications, garage and industrial tasks. See products in stock.

discover price list and dimensions

Magnets for underwater searches

Discover your passion related to seabed exploration! Our double-handle grips (F200, F400) provide safety guarantee and huge lifting capacity. Solid, corrosion-resistant housing and reinforced ropes will perform in challenging water conditions.

choose your set

Magnetic mounting systems

Proven solutions for mounting without drilling. Threaded mounts (M8, M10, M12) provide instant organization of work on production halls. Perfect for installing lighting, detectors and ads.

check industrial applications

🚀 Express processing: orders by 14:00 shipped within 24h!

Dhit sp. z o.o.
Product available Ships today (order by 14:00)

MP 62x42x25 / N38 - ring magnet

ring magnet

Catalog no 030205

GTIN/EAN: 5906301812227

5.00

Diameter

62 mm [±0,1 mm]

internal diameter Ø

42 mm [±0,1 mm]

Height

25 mm [±0,1 mm]

Weight

306.31 g

Magnetization Direction

↑ axial

Load capacity

58.67 kg / 575.60 N

Magnetic Induction

389.14 mT / 3891 Gs

Coating

[NiCuNi] Nickel

165.00 with VAT / pcs + price for transport

134.15 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
134.15 ZŁ
165.00 ZŁ
price from 5 pcs
126.10 ZŁ
155.10 ZŁ
price from 20 pcs
118.05 ZŁ
145.20 ZŁ
Need advice?

Call us +48 888 99 98 98 if you prefer let us know via request form through our site.
Strength along with appearance of a magnet can be verified with our magnetic calculator.

Same-day processing for orders placed before 14:00.

Technical details - MP 62x42x25 / N38 - ring magnet

Specification / characteristics - MP 62x42x25 / N38 - ring magnet

properties
properties values
Cat. no. 030205
GTIN/EAN 5906301812227
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Diameter 62 mm [±0,1 mm]
internal diameter Ø 42 mm [±0,1 mm]
Height 25 mm [±0,1 mm]
Weight 306.31 g
Magnetization Direction ↑ axial
Load capacity ~ ? 58.67 kg / 575.60 N
Magnetic Induction ~ ? 389.14 mT / 3891 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 62x42x25 / N38 - ring magnet
properties values units
remenance Br [min. - max.] ? 12.2-12.6 kGs
remenance Br [min. - max.] ? 1220-1260 mT
coercivity bHc ? 10.8-11.5 kOe
coercivity bHc ? 860-915 kA/m
actual internal force iHc ≥ 12 kOe
actual internal force iHc ≥ 955 kA/m
energy density [min. - max.] ? 36-38 BH max MGOe
energy density [min. - max.] ? 287-303 BH max KJ/m
max. temperature ? ≤ 80 °C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
properties values units
Vickers hardness ≥550 Hv
Density ≥7.4 g/cm3
Curie Temperature TC 312 - 380 °C
Curie Temperature TF 593 - 716 °F
Specific resistance 150 μΩ⋅cm
Bending strength 250 MPa
Compressive strength 1000~1100 MPa
Thermal expansion parallel (∥) to orientation (M) (3-4) x 10-6 °C-1
Thermal expansion perpendicular (⊥) to orientation (M) -(1-3) x 10-6 °C-1
Young's modulus 1.7 x 104 kg/mm²

Engineering modeling of the assembly - data

The following information represent the direct effect of a physical simulation. Values were calculated on models for the class Nd2Fe14B. Real-world conditions may differ from theoretical values. Treat these calculations as a preliminary roadmap when designing systems.

Table 1: Static pull force (pull vs distance) - interaction chart
MP 62x42x25 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4472 Gs
447.2 mT
58.67 kg / 129.35 pounds
58670.0 g / 575.6 N
dangerous!
1 mm 4338 Gs
433.8 mT
55.21 kg / 121.72 pounds
55213.2 g / 541.6 N
dangerous!
2 mm 4201 Gs
420.1 mT
51.77 kg / 114.13 pounds
51768.5 g / 507.8 N
dangerous!
3 mm 4061 Gs
406.1 mT
48.39 kg / 106.69 pounds
48394.9 g / 474.8 N
dangerous!
5 mm 3781 Gs
378.1 mT
41.94 kg / 92.47 pounds
41942.4 g / 411.5 N
dangerous!
10 mm 3097 Gs
309.7 mT
28.15 kg / 62.06 pounds
28148.0 g / 276.1 N
dangerous!
15 mm 2485 Gs
248.5 mT
18.12 kg / 39.94 pounds
18118.5 g / 177.7 N
dangerous!
20 mm 1972 Gs
197.2 mT
11.41 kg / 25.16 pounds
11412.7 g / 112.0 N
dangerous!
30 mm 1239 Gs
123.9 mT
4.51 kg / 9.93 pounds
4505.2 g / 44.2 N
warning
50 mm 533 Gs
53.3 mT
0.83 kg / 1.84 pounds
832.4 g / 8.2 N
low risk

Table 2: Vertical hold (vertical surface)
MP 62x42x25 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 11.73 kg / 25.87 pounds
11734.0 g / 115.1 N
1 mm Stal (~0.2) 11.04 kg / 24.34 pounds
11042.0 g / 108.3 N
2 mm Stal (~0.2) 10.35 kg / 22.83 pounds
10354.0 g / 101.6 N
3 mm Stal (~0.2) 9.68 kg / 21.34 pounds
9678.0 g / 94.9 N
5 mm Stal (~0.2) 8.39 kg / 18.49 pounds
8388.0 g / 82.3 N
10 mm Stal (~0.2) 5.63 kg / 12.41 pounds
5630.0 g / 55.2 N
15 mm Stal (~0.2) 3.62 kg / 7.99 pounds
3624.0 g / 35.6 N
20 mm Stal (~0.2) 2.28 kg / 5.03 pounds
2282.0 g / 22.4 N
30 mm Stal (~0.2) 0.90 kg / 1.99 pounds
902.0 g / 8.8 N
50 mm Stal (~0.2) 0.17 kg / 0.37 pounds
166.0 g / 1.6 N

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MP 62x42x25 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
17.60 kg / 38.80 pounds
17601.0 g / 172.7 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
11.73 kg / 25.87 pounds
11734.0 g / 115.1 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
5.87 kg / 12.93 pounds
5867.0 g / 57.6 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
29.34 kg / 64.67 pounds
29335.0 g / 287.8 N

Table 4: Steel thickness (saturation) - sheet metal selection
MP 62x42x25 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
3%
1.96 kg / 4.31 pounds
1955.7 g / 19.2 N
1 mm
8%
4.89 kg / 10.78 pounds
4889.2 g / 48.0 N
2 mm
17%
9.78 kg / 21.56 pounds
9778.3 g / 95.9 N
3 mm
25%
14.67 kg / 32.34 pounds
14667.5 g / 143.9 N
5 mm
42%
24.45 kg / 53.89 pounds
24445.8 g / 239.8 N
10 mm
83%
48.89 kg / 107.79 pounds
48891.7 g / 479.6 N
11 mm
92%
53.78 kg / 118.57 pounds
53780.8 g / 527.6 N
12 mm
100%
58.67 kg / 129.35 pounds
58670.0 g / 575.6 N

Table 5: Thermal stability (material behavior) - resistance threshold
MP 62x42x25 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 58.67 kg / 129.35 pounds
58670.0 g / 575.6 N
OK
40 °C -2.2% 57.38 kg / 126.50 pounds
57379.3 g / 562.9 N
OK
60 °C -4.4% 56.09 kg / 123.65 pounds
56088.5 g / 550.2 N
OK
80 °C -6.6% 54.80 kg / 120.81 pounds
54797.8 g / 537.6 N
100 °C -28.8% 41.77 kg / 92.09 pounds
41773.0 g / 409.8 N

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MP 62x42x25 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 264.93 kg / 584.07 pounds
5 588 Gs
39.74 kg / 87.61 pounds
39740 g / 389.8 N
N/A
1 mm 257.19 kg / 567.00 pounds
8 812 Gs
38.58 kg / 85.05 pounds
38578 g / 378.4 N
231.47 kg / 510.30 pounds
~0 Gs
2 mm 249.32 kg / 549.66 pounds
8 676 Gs
37.40 kg / 82.45 pounds
37398 g / 366.9 N
224.39 kg / 494.69 pounds
~0 Gs
3 mm 241.51 kg / 532.44 pounds
8 539 Gs
36.23 kg / 79.87 pounds
36227 g / 355.4 N
217.36 kg / 479.19 pounds
~0 Gs
5 mm 226.10 kg / 498.47 pounds
8 262 Gs
33.92 kg / 74.77 pounds
33915 g / 332.7 N
203.49 kg / 448.62 pounds
~0 Gs
10 mm 189.40 kg / 417.55 pounds
7 562 Gs
28.41 kg / 62.63 pounds
28409 g / 278.7 N
170.46 kg / 375.79 pounds
~0 Gs
20 mm 127.11 kg / 280.22 pounds
6 195 Gs
19.07 kg / 42.03 pounds
19066 g / 187.0 N
114.40 kg / 252.20 pounds
~0 Gs
50 mm 32.28 kg / 71.17 pounds
3 122 Gs
4.84 kg / 10.68 pounds
4843 g / 47.5 N
29.06 kg / 64.06 pounds
~0 Gs
60 mm 20.34 kg / 44.85 pounds
2 478 Gs
3.05 kg / 6.73 pounds
3052 g / 29.9 N
18.31 kg / 40.36 pounds
~0 Gs
70 mm 12.99 kg / 28.63 pounds
1 980 Gs
1.95 kg / 4.29 pounds
1948 g / 19.1 N
11.69 kg / 25.77 pounds
~0 Gs
80 mm 8.43 kg / 18.59 pounds
1 595 Gs
1.26 kg / 2.79 pounds
1265 g / 12.4 N
7.59 kg / 16.73 pounds
~0 Gs
90 mm 5.58 kg / 12.29 pounds
1 298 Gs
0.84 kg / 1.84 pounds
836 g / 8.2 N
5.02 kg / 11.06 pounds
~0 Gs
100 mm 3.76 kg / 8.29 pounds
1 065 Gs
0.56 kg / 1.24 pounds
564 g / 5.5 N
3.38 kg / 7.46 pounds
~0 Gs

Table 7: Hazards (implants) - warnings
MP 62x42x25 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 32.5 cm
Hearing aid 10 Gs (1.0 mT) 25.5 cm
Mechanical watch 20 Gs (2.0 mT) 20.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 15.5 cm
Remote 50 Gs (5.0 mT) 14.0 cm
Payment card 400 Gs (40.0 mT) 6.0 cm
HDD hard drive 600 Gs (60.0 mT) 5.0 cm

Table 8: Dynamics (cracking risk) - collision effects
MP 62x42x25 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 17.65 km/h
(4.90 m/s)
3.68 J
30 mm 25.31 km/h
(7.03 m/s)
7.57 J
50 mm 31.49 km/h
(8.75 m/s)
11.72 J
100 mm 44.16 km/h
(12.27 m/s)
23.04 J

Table 9: Anti-corrosion coating durability
MP 62x42x25 / N38

Technical parameter Value / Description
Coating type [NiCuNi] Nickel
Layer structure Nickel - Copper - Nickel
Layer thickness 10-20 µm
Salt spray test (SST) ? 24 h
Recommended environment Indoors only (dry)

Table 10: Construction data (Flux)
MP 62x42x25 / N38

Parameter Value SI Unit / Description
Magnetic Flux 100 906 Mx 1009.1 µWb
Pc Coefficient 0.64 High (Stable)

Table 11: Submerged application
MP 62x42x25 / N38

Environment Effective steel pull Effect
Air (land) 58.67 kg Standard
Water (riverbed) 67.18 kg
(+8.51 kg buoyancy gain)
+14.5%
Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Shear force

*Warning: On a vertical wall, the magnet retains just a fraction of its nominal pull.

2. Steel thickness impact

*Thin steel (e.g. 0.5mm PC case) severely limits the holding force.

3. Power loss vs temp

*For N38 grade, the safety limit is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.64

The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. The solid red line represents the demagnetization curve (material potential), while the dashed blue line is the load line based on the magnet's geometry. The Pc (Permeance Coefficient), also known as the load line slope, is a dimensionless value that describes the relationship between the magnet's shape and its magnetic stability. The intersection of these two lines (the black dot) is the operating point — it determines the actual magnetic flux density generated by the magnet in this specific configuration. A higher Pc value means the magnet is more 'slender' (tall relative to its area), resulting in a higher operating point and better resistance to irreversible demagnetization caused by external fields or temperature. A value of 0.42 is relatively low (typical for flat magnets), meaning the operating point is closer to the 'knee' of the curve — caution is advised when operating at temperatures near the maximum limit to avoid strength loss.

Technical specification and ecology
Chemical composition
iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%
Environmental data
recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 030205-2026
Quick Unit Converter
Pulling force

Magnetic Induction

Other offers

It is ideally suited for places where solid attachment of the magnet to the substrate is required without the risk of detachment. Thanks to the hole (often for a screw), this model enables quick installation to wood, wall, plastic, or metal. This product with a force of 58.67 kg works great as a door latch, speaker holder, or mounting element in devices.
This material behaves more like porcelain than steel, so it doesn't forgive mistakes during mounting. When tightening the screw, you must maintain caution. We recommend tightening manually with a screwdriver, not an impact driver, because too much pressure will cause the ring to crack. The flat screw head should evenly press the magnet. Remember: cracking during assembly results from material properties, not a product defect.
These magnets are coated with standard Ni-Cu-Ni plating, which protects them in indoor conditions, but does not ensure full waterproofing. Damage to the protective layer during assembly is the most common cause of rusting. If you must use it outside, paint it with anti-corrosion paint after mounting.
A screw or bolt with a thread diameter smaller than 42 mm fits this model. If the magnet does not have a chamfer (cone), we recommend using a screw with a flat or cylindrical head, or possibly using a washer. Aesthetic mounting requires selecting the appropriate head size.
It is a magnetic ring with a diameter of 62 mm and thickness 25 mm. The key parameter here is the holding force amounting to approximately 58.67 kg (force ~575.60 N). The mounting hole diameter is precisely 42 mm.
The poles are located on the planes with holes, not on the sides of the ring. In the case of connecting two rings, make sure one is turned the right way. We do not offer paired sets with marked poles in this category, but they are easy to match manually.

Advantages as well as disadvantages of rare earth magnets.

Strengths

Besides their stability, neodymium magnets are valued for these benefits:
  • They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
  • They feature excellent resistance to weakening of magnetic properties when exposed to opposing magnetic fields,
  • The use of an aesthetic coating of noble metals (nickel, gold, silver) causes the element to present itself better,
  • Neodymium magnets create maximum magnetic induction on a contact point, which ensures high operational effectiveness,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Thanks to freedom in forming and the capacity to customize to unusual requirements,
  • Versatile presence in future technologies – they find application in hard drives, motor assemblies, advanced medical instruments, and industrial machines.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Weaknesses

Problematic aspects of neodymium magnets: weaknesses and usage proposals
  • They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also increases its resistance to damage
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • We recommend a housing - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complex shapes.
  • Potential hazard related to microscopic parts of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child health protection. Furthermore, small components of these devices can disrupt the diagnostic process medical after entering the body.
  • Due to complex production process, their price is relatively high,

Lifting parameters

Highest magnetic holding forcewhat it depends on?

Magnet power was determined for optimal configuration, taking into account:
  • with the contact of a yoke made of low-carbon steel, ensuring maximum field concentration
  • whose thickness is min. 10 mm
  • characterized by lack of roughness
  • without the slightest clearance between the magnet and steel
  • under perpendicular force vector (90-degree angle)
  • at temperature room level

Determinants of lifting force in real conditions

In real-world applications, the actual lifting capacity results from several key aspects, listed from crucial:
  • Distance – existence of foreign body (rust, tape, gap) interrupts the magnetic circuit, which lowers power steeply (even by 50% at 0.5 mm).
  • Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the maximum value.
  • Base massiveness – insufficiently thick sheet causes magnetic saturation, causing part of the flux to be wasted to the other side.
  • Material type – the best choice is pure iron steel. Stainless steels may attract less.
  • Surface structure – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Roughness creates an air distance.
  • Thermal environment – heating the magnet results in weakening of force. Check the thermal limit for a given model.

Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under perpendicular forces, in contrast under attempts to slide the magnet the load capacity is reduced by as much as 5 times. Additionally, even a slight gap between the magnet and the plate decreases the lifting capacity.

H&S for magnets
Beware of splinters

NdFeB magnets are sintered ceramics, which means they are prone to chipping. Impact of two magnets leads to them shattering into small pieces.

Respect the power

Before starting, read the rules. Uncontrolled attraction can break the magnet or injure your hand. Think ahead.

Mechanical processing

Fire hazard: Neodymium dust is highly flammable. Avoid machining magnets in home conditions as this risks ignition.

Product not for children

Adult use only. Tiny parts pose a choking risk, causing serious injuries. Store out of reach of kids and pets.

Phone sensors

An intense magnetic field interferes with the operation of magnetometers in phones and navigation systems. Maintain magnets close to a device to prevent breaking the sensors.

Heat sensitivity

Keep cool. Neodymium magnets are sensitive to temperature. If you need operation above 80°C, inquire about special high-temperature series (H, SH, UH).

Cards and drives

Avoid bringing magnets near a purse, computer, or screen. The magnetism can destroy these devices and erase data from cards.

Health Danger

People with a heart stimulator have to maintain an safe separation from magnets. The magnetic field can disrupt the functioning of the implant.

Hand protection

Protect your hands. Two powerful magnets will snap together instantly with a force of several hundred kilograms, destroying everything in their path. Be careful!

Sensitization to coating

It is widely known that the nickel plating (standard magnet coating) is a potent allergen. If your skin reacts to metals, refrain from direct skin contact or opt for versions in plastic housing.

Caution! More info about risks in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98