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MP 62x42x25 / N38 - ring magnet

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, mazowieckie, 05-850, PL
Telephone: +48 22 499 98 98
Price range: 1-6500 PLN

ring magnet

Catalog no 030205

GTIN/EAN: 5906301812227

5.00

Load capacity 58.67 kg / 575.60 N Magnetic Induction 389.14 mT / 3891 Gs

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
Coating: [NiCuNi] Nickel

How we measure these parameters — certificates and measurements

check specifications »

134.15 zł net / pcs

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Frequently asked questions

What is the hole in a ring magnet for?

For mounting on a screw or a shaft. The bore may be cylindrical or countersunk for a screw head. The hole removes magnet volume, so a ring holds less than a disc of the same outside diameter.

What is the polarisation?

Axial as standard — poles on the flat faces of the ring. Diametrical polarisation is made to order.

What sizes are available?

Outside diameter from 5 to 62 mm from stock. To order up to 200 mm outside diameter, 180 mm bore and 40 mm height, with a lead time of 25–35 days.

Guides from the knowledge base

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

PDF report Calculator

Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Technical data - 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
Remanence Br ?	12.2-12.6	kGs
Remanence Br ?	1220-1260	mT
Coercivity bHc ?	10.8-11.5	kOe
Coercivity bHc ?	860-915	kA/m
Intrinsic coercivity iHc	≥ 12	kOe
Intrinsic coercivity iHc	≥ 955	kA/m
Energy product BHmax ?	36-38	BH max MGOe
Energy product BHmax ?	287-303	BH max KJ/m
Maximum working temperature ?	≤ 80	°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	310	°C
Curie Temperature TF	590	°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 magnet - data

Presented values represent the outcome of a mathematical calculation. Values were calculated on algorithms for the class Nd₂Fe₁₄B. Operational parameters might slightly differ. Use these calculations as a preliminary roadmap during assembly planning.

Table 1: Static force (force 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	medium risk
50 mm	533 Gs 53.3 mT	0.83 kg / 1.84 pounds 832.4 g / 8.2 N	low risk

Grip strength weakens drastically with every mm of spacing. Keep in mind that every additional insulation layer (e.g., contamination, paint, veneer) strongly reduces the pull force. Magnets operate optimally at the point of direct contact; distance nullifies the force. Observe how quickly the load capacity plummet, when the magnet does not touch tightly to the steel surface. When planning the mounting, discard unnecessary gaps.

Table 2: Sliding capacity (wall)
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

This section shows the theoretical weight limit needed to cause the sliding of the magnet vertically along a vertical steel wall (considering typical friction coefficient). The holding force depends on the air gap between the magnet and the surface.

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

When placing a element on a vertical surface (e.g., a car body), it you can count on barely about 1/5 of its nominal power. Gravity as well as a low friction coefficient influence the fact that holders slip faster than they pop off the substrate. Want to create a hanger? Remember that the sliding force is significantly lower than the perpendicular breakaway force. On a slippery surface, the holder will slide down under a significantly smaller weight. Utilizing a rubberized pad can significantly improve the result.

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

A too thin steel is incapable of take in the entire magnetic field, which wastes potential of the magnet. If you install a neodymium to a thin surface, the flux will penetrate right through and the holding will be smaller. To utilize the maximum of this neodymium's potential, you need a suitably thick element of steel. The material oversaturation causes that on thin elements (e.g., car bodies), the holder shows lower pull force. We recommend selecting the steel dimension based on the following data.

Table 5: Thermal stability (stability) - thermal limit
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

Ordinary NdFeB products irreversibly lose parameters after exceeding the maximum temperature. Avoid high temperatures – high temperature can permanently destroy this magnet. With increasing heat, the magnet's force briefly lowers. Refrain from using this magnet close to heaters higher than its operating temperature limit. Too high temperature will cause permanent loss of magnetic properties.

*Important note: Thermal stability is determined by both grade, and the Permeance Coefficient Pc. Low-profile magnets (pancake types) are more susceptible to demagnetization under lower heat stress compared to rod magnets. Warning indicator in the table indicates permanent field degradation for this specific geometry.

Table 6: Two magnets (attraction) - field range
MP 62x42x25 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Force (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

Two magnetic products interact from a wider radius than a magnet and sheet setup. Such a system of two magnets produces a massive flux and a wider radius of action. Want to build a powerful holder? Utilize two neodymiums instead of a neodymium and a striker plate. Be careful that when bringing together two magnets, the collision energy is huge. The levitation is marginally weaker than the connection force, but still impressive.
*Flux density between like poles reaches ~0 Gs at the geometric center between the magnets (resulting from vector opposition).
Important: Figures refer to friction force of a pair of matching magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Safety (HSE) (electronics) - 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
Timepiece	20 Gs (2.0 mT)	20.0 cm
Mobile device	40 Gs (4.0 mT)	15.5 cm
Car key	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

Powerful magnet radiation poses a serious hazard to electronics and medical implants. These neodymiums generate a flux that disrupts operation of digital equipment. Be aware: the invisible magnetic field penetrates the body and glass. Exceptional care must be taken by people with cochlear implants and insulin pumps. The risk also applies to: mechanical watches, car keys, membranes, and screens. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - collision effects
MP 62x42x25 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	18.77 km/h (5.21 m/s)	4.16 J
30 mm	23.85 km/h (6.63 m/s)	6.72 J
50 mm	24.58 km/h (6.83 m/s)	7.14 J
100 mm	24.78 km/h (6.88 m/s)	7.26 J

Magnetic elements are delicate – a collision with steel risks their cracking. Watch the impact speed – a neodymium left loose becomes dangerous. Striking energy can trigger coating fragments or painful pinches to skin. Always hold the magnet during bringing near metal so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h ends with a crack of the neodymium. Wear safety glasses when playing with large magnets.

Table 9: Coating parameters (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)

The following table defines the conditions under which this product can be safely used. Note the thickness of the protective layer.

Table 10: Electrical data (P_c)
MP 62x42x25 / N38

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

Flux value emitted by the magnet pole. Essential parameter when building generators as well as sensors. The P_c coefficient defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
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%

Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.

Contrary to myths, water does not block the magnetic field. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Vertical hold

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

2. Steel saturation

*Thin steel (e.g. 0.5mm PC case) significantly weakens the holding force.

3. Power loss vs temp

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

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

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

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. 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 P_c (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 P_c 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

Elemental analysis

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%

Ecology and recycling (GPSR)

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

Measurement Calculator

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Kilograms (kg)

Force in lbs

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The ring-shaped magnet MP 62x42x25 / N38 is created for permanent mounting, where glue might fail or be insufficient. Mounting is clean and reversible, unlike gluing. This product with a force of 58.67 kg works great as a cabinet closure, speaker holder, or spacer element in devices.

This is a crucial issue when working with model MP 62x42x25 / N38. Neodymium magnets are sintered ceramics, which means they are hard but breakable and inelastic. One turn too many can destroy the magnet, so do it slowly. It's a good idea to use a rubber spacer under the screw head, which will cushion the stresses. Remember: cracking during assembly results from material properties, not a product defect.

Moisture can penetrate micro-cracks in the coating and cause oxidation of the magnet. In the place of the mounting hole, the coating is thinner and can be damaged when tightening the screw, which will become a corrosion focus. 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. For magnets with a straight hole, a conical head can act like a wedge and burst the magnet. Aesthetic mounting requires selecting the appropriate head size.

The presented product is a ring magnet with dimensions Ø62 mm (outer diameter) and height 25 mm. The key parameter here is the holding force amounting to approximately 58.67 kg (force ~575.60 N). The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 42 mm.

The poles are located on the planes with holes, not on the sides of the ring. If you want two such magnets screwed with cones facing each other (faces) to attract, you must connect them with opposite poles (N to S). We do not offer paired sets with marked poles in this category, but they are easy to match manually.

Strengths and weaknesses of Nd₂Fe₁₄B magnets.

Advantages

In addition to their long-term stability, neodymium magnets provide the following advantages:

They do not lose magnetism, even over approximately ten years – the reduction in strength is only ~1% (according to tests),
They show high resistance to demagnetization induced by external magnetic fields,
Thanks to the glossy finish, the plating of nickel, gold, or silver gives an professional appearance,
They are known for high magnetic induction at the operating surface, making them more effective,
Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
Thanks to freedom in shaping and the capacity to adapt to complex applications,
Wide application in advanced technology sectors – they serve a role in computer drives, drive modules, medical devices, also technologically advanced constructions.
Thanks to their power density, small magnets offer high operating force, in miniature format,

Limitations

Disadvantages of neodymium magnets:

To avoid cracks under impact, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
They oxidize in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
Limited ability of producing threads in the magnet and complicated shapes - preferred is cover - mounting mechanism.
Potential hazard resulting from small fragments of magnets pose a threat, if swallowed, which is particularly important in the context of child safety. It is also worth noting that small components of these devices can disrupt the diagnostic process medical in case of swallowing.
With mass production the cost of neodymium magnets is a challenge,

Pull force analysis

Maximum lifting capacity of the magnet – what affects it?

The force parameter is a result of laboratory testing performed under the following configuration:

with the application of a yoke made of low-carbon steel, guaranteeing maximum field concentration
whose transverse dimension reaches at least 10 mm
with an polished contact surface
with zero gap (without impurities)
under axial force direction (90-degree angle)
at temperature approx. 20 degrees Celsius

Key elements affecting lifting force

It is worth knowing that the magnet holding may be lower depending on elements below, in order of importance:

Distance (betwixt the magnet and the metal), because even a microscopic distance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to paint, corrosion or debris).
Loading method – catalog parameter refers to pulling vertically. When applying parallel force, the magnet exhibits much less (typically approx. 20-30% of nominal force).
Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet restricts the attraction force (the magnet "punches through" it).
Material composition – different alloys reacts the same. Alloy additives worsen the attraction effect.
Plate texture – smooth surfaces guarantee perfect abutment, which improves field saturation. Rough surfaces reduce efficiency.
Operating temperature – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and at low temperatures gain strength (up to a certain limit).

Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under shearing force the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate decreases the lifting capacity.

H&S for magnets

Safe distance

Do not bring magnets near a purse, laptop, or TV. The magnetism can permanently damage these devices and wipe information from cards.

Dust is flammable

Mechanical processing of NdFeB material poses a fire risk. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Pinching danger

Watch your fingers. Two powerful magnets will join immediately with a force of massive weight, crushing anything in their path. Be careful!

Avoid contact if allergic

Certain individuals have a contact allergy to nickel, which is the common plating for NdFeB magnets. Extended handling might lead to an allergic reaction. It is best to use protective gloves.

Heat warning

Standard neodymium magnets (N-type) lose magnetization when the temperature exceeds 80°C. Damage is permanent.

No play value

Strictly keep magnets away from children. Risk of swallowing is high, and the effects of magnets connecting inside the body are tragic.

GPS Danger

A powerful magnetic field interferes with the functioning of compasses in phones and GPS navigation. Do not bring magnets near a device to prevent breaking the sensors.

Respect the power

Use magnets consciously. Their powerful strength can shock even professionals. Be vigilant and do not underestimate their power.

Life threat

Life threat: Neodymium magnets can deactivate heart devices and defibrillators. Stay away if you have electronic implants.

Shattering risk

Protect your eyes. Magnets can fracture upon violent connection, ejecting sharp fragments into the air. Wear goggles.

Security! Looking for details? Check our post: Why are neodymium magnets dangerous?

MP 62x42x25 / N38 - ring magnet

Technical data - MP 62x42x25 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering modeling of the magnet - data

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

Table 2: Sliding capacity (wall) MP 62x42x25 / N38

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

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

Table 5: Thermal stability (stability) - thermal limit MP 62x42x25 / N38

Table 6: Two magnets (attraction) - field range MP 62x42x25 / N38

Table 7: Safety (HSE) (electronics) - warnings MP 62x42x25 / N38

Table 8: Collisions (kinetic energy) - collision effects MP 62x42x25 / N38

Table 9: Coating parameters (durability) MP 62x42x25 / N38

Table 10: Electrical data (Pc) MP 62x42x25 / N38

Table 11: Underwater work (magnet fishing) MP 62x42x25 / N38

1. Vertical hold

2. Steel saturation

3. Power loss vs temp

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

Elemental analysis

Ecology and recycling (GPSR)

Pulling force

Magnetic Induction

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Strengths and weaknesses of Nd2Fe14B magnets.

Advantages

Limitations

Pull force analysis

Maximum lifting capacity of the magnet – what affects it?

Key elements affecting lifting force

H&S for magnets

Safe distance

Dust is flammable

Pinching danger

Avoid contact if allergic

Heat warning

No play value

GPS Danger

Respect the power

Life threat

Shattering risk

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

Table 2: Sliding capacity (wall)
MP 62x42x25 / N38

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

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

Table 5: Thermal stability (stability) - thermal limit
MP 62x42x25 / N38

Table 6: Two magnets (attraction) - field range
MP 62x42x25 / N38

Table 7: Safety (HSE) (electronics) - warnings
MP 62x42x25 / N38

Table 8: Collisions (kinetic energy) - collision effects
MP 62x42x25 / N38

Table 9: Coating parameters (durability)
MP 62x42x25 / N38

Table 10: Electrical data (P_c)
MP 62x42x25 / N38

Table 11: Underwater work (magnet fishing)
MP 62x42x25 / N38

Strengths and weaknesses of Nd₂Fe₁₄B magnets.