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MP 25x5x5 / N38 - ring magnet

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, Poland, 05-850, PL
Telephone: +48 22 499 98 98
Price range: PLN 1-6500
Rating: 5

ring magnet

Catalog no 030193

GTIN/EAN: 5906301812104

5.00

Diameter

25 mm [±0,1 mm]

internal diameter Ø

5 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

17.67 g

Magnetization Direction

↑ axial

Load capacity

7.66 kg / 75.12 N

Magnetic Induction

230.20 mT / 2302 Gs

Coating

[NiCuNi] Nickel

technical details »

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Physical properties - MP 25x5x5 / N38 - ring magnet

Specification / characteristics - MP 25x5x5 / N38 - ring magnet

properties

properties	values
Cat. no.	030193
GTIN/EAN	5906301812104
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	25 mm [±0,1 mm]
internal diameter Ø	5 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	17.67 g
Magnetization Direction	↑ axial
Load capacity ~ ?	7.66 kg / 75.12 N
Magnetic Induction ~ ?	230.20 mT / 2302 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 25x5x5 / 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

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

Technical modeling of the product - technical parameters

The following information are the direct effect of a mathematical simulation. Values rely on models for the material Nd₂Fe₁₄B. Real-world parameters might slightly deviate from the simulation results. Please consider these data as a preliminary roadmap when designing systems.

Table 1: Static force (force vs distance) - power drop
MP 25x5x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5777 Gs 577.7 mT	7.66 kg / 16.89 lbs 7660.0 g / 75.1 N	warning
1 mm	5310 Gs 531.0 mT	6.47 kg / 14.27 lbs 6471.0 g / 63.5 N	warning
2 mm	4846 Gs 484.6 mT	5.39 kg / 11.88 lbs 5388.6 g / 52.9 N	warning
3 mm	4397 Gs 439.7 mT	4.44 kg / 9.78 lbs 4437.9 g / 43.5 N	warning
5 mm	3576 Gs 357.6 mT	2.93 kg / 6.47 lbs 2934.8 g / 28.8 N	warning
10 mm	2073 Gs 207.3 mT	0.99 kg / 2.17 lbs 985.9 g / 9.7 N	safe
15 mm	1231 Gs 123.1 mT	0.35 kg / 0.77 lbs 347.9 g / 3.4 N	safe
20 mm	773 Gs 77.3 mT	0.14 kg / 0.30 lbs 137.0 g / 1.3 N	safe
30 mm	356 Gs 35.6 mT	0.03 kg / 0.06 lbs 29.0 g / 0.3 N	safe
50 mm	115 Gs 11.5 mT	0.00 kg / 0.01 lbs 3.0 g / 0.0 N	safe

Pulling power drops significantly with every mm of distance. Remember that even a very thin break (e.g., contamination, paint, veneer) noticeably weakens the grip. Magnetic products operate most effectively in perfect adhesion; air break weakens the force. Notice how quickly the pull force plummet, when the magnet does not adhere tightly to the metal substrate. When calculating the mounting, discard additional spacers.

Table 2: Vertical capacity (wall)
MP 25x5x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.53 kg / 3.38 lbs 1532.0 g / 15.0 N
1 mm	Stal (~0.2)	1.29 kg / 2.85 lbs 1294.0 g / 12.7 N
2 mm	Stal (~0.2)	1.08 kg / 2.38 lbs 1078.0 g / 10.6 N
3 mm	Stal (~0.2)	0.89 kg / 1.96 lbs 888.0 g / 8.7 N
5 mm	Stal (~0.2)	0.59 kg / 1.29 lbs 586.0 g / 5.7 N
10 mm	Stal (~0.2)	0.20 kg / 0.44 lbs 198.0 g / 1.9 N
15 mm	Stal (~0.2)	0.07 kg / 0.15 lbs 70.0 g / 0.7 N
20 mm	Stal (~0.2)	0.03 kg / 0.06 lbs 28.0 g / 0.3 N
30 mm	Stal (~0.2)	0.01 kg / 0.01 lbs 6.0 g / 0.1 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 N

The following data defines the approximate weight limit sufficient to cause the downward movement of the magnet vertically against a vertical metal surface (assuming typical friction coefficient). This parameter depends on the gap size between the magnet and the metal.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MP 25x5x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.30 kg / 5.07 lbs 2298.0 g / 22.5 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.53 kg / 3.38 lbs 1532.0 g / 15.0 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.77 kg / 1.69 lbs 766.0 g / 7.5 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.83 kg / 8.44 lbs 3830.0 g / 37.6 N

When placing a element on a upright surface (e.g., a fridge), it will maintain just about 20%-30% of nominal attraction strength. Gravitational force and a low friction coefficient cause that products slide down easier than they pop off the substrate. Want to create a wall mount? Consider that the sliding force is much weaker than the perpendicular breakaway force. On a painted metal, the magnet will slip down under a much lighter weight. Using a rubber pad can drastically increase the grip.

Table 4: Steel thickness (saturation) - sheet metal selection
MP 25x5x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.77 kg / 1.69 lbs 766.0 g / 7.5 N
1 mm	25%	1.92 kg / 4.22 lbs 1915.0 g / 18.8 N
2 mm	50%	3.83 kg / 8.44 lbs 3830.0 g / 37.6 N
3 mm	75%	5.75 kg / 12.67 lbs 5745.0 g / 56.4 N
5 mm	100%	7.66 kg / 16.89 lbs 7660.0 g / 75.1 N
10 mm	100%	7.66 kg / 16.89 lbs 7660.0 g / 75.1 N
11 mm	100%	7.66 kg / 16.89 lbs 7660.0 g / 75.1 N
12 mm	100%	7.66 kg / 16.89 lbs 7660.0 g / 75.1 N

A thin metal plate is unable to absorb the entire magnetic field, which squanders power of the magnet. Should you install a neodymium to a thin surface, the magnetism will penetrate right through and the pull force will drop sharply. To utilize 100% of this magnet's potential, you need a suitably thick element of metal. The saturation effect means that on sheet metal structures (e.g., thin profiles), the magnet shows lower pull force. We advise picking the steel dimension according to the table below.

Table 5: Thermal stability (material behavior) - thermal limit
MP 25x5x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	7.66 kg / 16.89 lbs 7660.0 g / 75.1 N	OK
40 °C	-2.2%	7.49 kg / 16.52 lbs 7491.5 g / 73.5 N	OK
60 °C	-4.4%	7.32 kg / 16.14 lbs 7323.0 g / 71.8 N	OK
80 °C	-6.6%	7.15 kg / 15.77 lbs 7154.4 g / 70.2 N
100 °C	-28.8%	5.45 kg / 12.02 lbs 5453.9 g / 53.5 N

Classic neodymiums change their properties power after exceeding the maximum temperature. Protect against heat – high temperature can irreversibly demagnetize this magnet. As the temperature rises, the neodymium's force temporarily decreases. Do not use this magnet close to heaters higher than its working range. Exceeding the critical threshold will cause irreversible degradation of magnetism.

*Important note: Temperature resistance depends not only on the material grade, as well as the dimension ratios. Flat magnets (pancake types) risk losing magnetic properties sooner than taller cylinders. Warning indicator in the table indicates permanent field degradation for this particular item.

Table 6: Two magnets (attraction) - field range
MP 25x5x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	82.42 kg / 181.72 lbs 6 082 Gs	12.36 kg / 27.26 lbs 12364 g / 121.3 N	N/A
1 mm	75.95 kg / 167.44 lbs 11 091 Gs	11.39 kg / 25.12 lbs 11392 g / 111.8 N	68.35 kg / 150.69 lbs ~0 Gs
2 mm	69.63 kg / 153.51 lbs 10 620 Gs	10.44 kg / 23.03 lbs 10445 g / 102.5 N	62.67 kg / 138.16 lbs ~0 Gs
3 mm	63.64 kg / 140.29 lbs 10 153 Gs	9.55 kg / 21.04 lbs 9545 g / 93.6 N	57.27 kg / 126.26 lbs ~0 Gs
5 mm	52.69 kg / 116.16 lbs 9 238 Gs	7.90 kg / 17.42 lbs 7903 g / 77.5 N	47.42 kg / 104.54 lbs ~0 Gs
10 mm	31.58 kg / 69.62 lbs 7 152 Gs	4.74 kg / 10.44 lbs 4737 g / 46.5 N	28.42 kg / 62.66 lbs ~0 Gs
20 mm	10.61 kg / 23.39 lbs 4 145 Gs	1.59 kg / 3.51 lbs 1591 g / 15.6 N	9.55 kg / 21.05 lbs ~0 Gs
50 mm	0.65 kg / 1.43 lbs 1 024 Gs	0.10 kg / 0.21 lbs 97 g / 1.0 N	0.58 kg / 1.28 lbs ~0 Gs
60 mm	0.31 kg / 0.69 lbs 712 Gs	0.05 kg / 0.10 lbs 47 g / 0.5 N	0.28 kg / 0.62 lbs ~0 Gs
70 mm	0.16 kg / 0.36 lbs 514 Gs	0.02 kg / 0.05 lbs 24 g / 0.2 N	0.15 kg / 0.32 lbs ~0 Gs
80 mm	0.09 kg / 0.20 lbs 383 Gs	0.01 kg / 0.03 lbs 14 g / 0.1 N	0.08 kg / 0.18 lbs ~0 Gs
90 mm	0.05 kg / 0.12 lbs 293 Gs	0.01 kg / 0.02 lbs 8 g / 0.1 N	0.05 kg / 0.11 lbs ~0 Gs
100 mm	0.03 kg / 0.07 lbs 230 Gs	0.00 kg / 0.01 lbs 5 g / 0.0 N	0.03 kg / 0.06 lbs ~0 Gs

Two magnetic products attract each other from a much further distance than a magnet and steel setup. Such a system of magnet-to-magnet creates a more powerful interaction and a wider radius of performance. Planning to create a powerful holder? Apply two magnets instead of one magnet and a striker plate. Be careful that when attracting two neodymiums, the impact force is massive. The repulsion force is a bit weaker than the connection force, but still significant.
*Field value between like poles is approximately ~0 Gs in the exact middle of the gap (resulting from vector opposition).
Note: Estimates show shear force of dual matching magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Safety (HSE) (electronics) - warnings
MP 25x5x5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	17.0 cm
Hearing aid	10 Gs (1.0 mT)	13.5 cm
Mechanical watch	20 Gs (2.0 mT)	10.5 cm
Phone / Smartphone	40 Gs (4.0 mT)	8.0 cm
Car key	50 Gs (5.0 mT)	7.5 cm
Payment card	400 Gs (40.0 mT)	3.0 cm
HDD hard drive	600 Gs (60.0 mT)	2.5 cm

Extremely neodym field is a real danger to IT equipment and pacemakers. These neodymiums produce a flux that destroys function of digital equipment. Remember: the unseen radiation penetrates the body and housings. Increased vigilance must be taken by people with cochlear implants and drug dispensers. Also at risk are: automatic timepieces, car keys, membranes, and screens. Avoid contact with magnetic cards, hard drives, or sensitive navigation tools.

Table 8: Impact energy (cracking risk) - warning
MP 25x5x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	22.62 km/h (6.28 m/s)	0.35 J
30 mm	36.46 km/h (10.13 m/s)	0.91 J
50 mm	46.96 km/h (13.05 m/s)	1.50 J
100 mm	66.40 km/h (18.45 m/s)	3.01 J

Magnetic elements are prone to chipping – a strong collision with metal can result in shattering. Pay attention to connection velocity – a magnet released freely turns into a projectile. Kinetic force can trigger coating fragments or painful pinches to fingers. Always hold the magnet during bringing near metal so it doesn't hit with great force against the steel surface. A collision at high speed means shattering of the magnet. Wear safety glasses when working with large magnets.

Table 9: Surface protection spec
MP 25x5x5 / 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)

For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Electrical data (Flux)
MP 25x5x5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	24 536 Mx	245.4 µWb
P_c Coefficient	1.03	High (Stable)

Total magnetic flux emitted by the pole surface. Essential parameter when building generators and motors. P_c value determines the working geometry.

Table 11: Underwater work (magnet fishing)
MP 25x5x5 / N38

Environment	Effective steel pull	Effect
Air (land)	7.66 kg	Standard
Water (riverbed)	8.77 kg (+1.11 kg buoyancy gain)	+14.5%

Rust risk: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.

Contrary to myths, water does not block the magnetic field. Buoyancy helps in lifting finds.

1. Sliding resistance

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

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) drastically 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 P_c (Permeance Coefficient) = 1.03

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 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.

Engineering data and GPSR

Material specification

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: 030193-2026

Magnet Unit Converter

Magnet pull force

Newtons (N)

Force in lbs

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Induction (Gs)

Insert a value into any field, to see the rest will convert automatically.

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The ring-shaped magnet MP 25x5x5 / N38 is created for permanent mounting, where glue might fail or be insufficient. Mounting is clean and reversible, unlike gluing. It is also often used in advertising for fixing signs and in workshops for organizing tools.

This is a crucial issue when working with model MP 25x5x5 / N38. Neodymium magnets are sintered ceramics, which means they are very brittle and inelastic. When tightening the screw, you must maintain great sensitivity. We recommend tightening manually with a screwdriver, not an impact driver, because excessive force 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 is not sufficient for rain. 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. This product is dedicated for inside building use. For outdoor applications, we recommend choosing magnets in hermetic housing or additional protection with varnish.

The inner hole diameter determines the maximum size of the mounting element. For magnets with a straight hole, a conical head can act like a wedge and burst the magnet. Always check that the screw head is not larger than the outer diameter of the magnet (25 mm), so it doesn't protrude beyond the outline.

The presented product is a ring magnet with dimensions Ø25 mm (outer diameter) and height 5 mm. The key parameter here is the holding force amounting to approximately 7.66 kg (force ~75.12 N). The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 5 mm.

These magnets are magnetized axially (through the thickness), which means one flat side is the N pole and the other is S. 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 Nd₂Fe₁₄B magnets.

Benefits

Besides their tremendous field intensity, neodymium magnets offer the following advantages:

They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (in laboratory conditions),
They feature excellent resistance to weakening of magnetic properties as a result of opposing magnetic fields,
In other words, due to the aesthetic surface of silver, the element becomes visually attractive,
Magnetic induction on the working part of the magnet turns out to be impressive,
Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
Considering the potential of precise molding and customization to individualized solutions, neodymium magnets can be created in a variety of geometric configurations, which makes them more universal,
Huge importance in electronics industry – they are utilized in computer drives, electromotive mechanisms, precision medical tools, and technologically advanced constructions.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Cons of neodymium magnets and ways of using them

Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a steel housing, which not only protects them against impacts but also raises their durability
When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
They oxidize in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
Limited possibility of creating threads in the magnet and complicated shapes - preferred is casing - mounting mechanism.
Possible danger resulting from small fragments of magnets pose a threat, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that small elements of these products can disrupt the diagnostic process medical after entering the body.
High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities

Pull force analysis

Optimal lifting capacity of a neodymium magnet – what it depends on?

Magnet power was determined for ideal contact conditions, taking into account:

on a plate made of mild steel, perfectly concentrating the magnetic field
possessing a thickness of minimum 10 mm to avoid saturation
characterized by lack of roughness
with direct contact (no coatings)
during pulling in a direction vertical to the mounting surface
at ambient temperature approx. 20 degrees Celsius

Magnet lifting force in use – key factors

In real-world applications, the real power is determined by many variables, ranked from the most important:

Clearance – existence of foreign body (rust, dirt, air) acts as an insulator, which reduces power steeply (even by 50% at 0.5 mm).
Direction of force – maximum parameter is reached only during pulling at a 90° angle. The force required to slide of the magnet along the surface is usually many times smaller (approx. 1/5 of the lifting capacity).
Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
Steel type – low-carbon steel attracts best. Alloy steels decrease magnetic permeability and lifting capacity.
Surface condition – ground elements guarantee perfect abutment, which improves force. Uneven metal weaken the grip.
Operating temperature – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and in frost they can be stronger (up to a certain limit).

Lifting capacity was determined by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular detachment force, however under parallel forces the load capacity is reduced by as much as 75%. Additionally, even a minimal clearance between the magnet and the plate decreases the load capacity.

H&S for magnets

GPS Danger

GPS units and smartphones are highly sensitive to magnetism. Direct contact with a powerful NdFeB magnet can ruin the internal compass in your phone.

Safe distance

Powerful magnetic fields can corrupt files on payment cards, hard drives, and other magnetic media. Keep a distance of min. 10 cm.

Power loss in heat

Standard neodymium magnets (N-type) lose power when the temperature goes above 80°C. The loss of strength is permanent.

Medical interference

Patients with a pacemaker must keep an absolute distance from magnets. The magnetism can interfere with the functioning of the implant.

Crushing risk

Watch your fingers. Two powerful magnets will join immediately with a force of several hundred kilograms, crushing anything in their path. Exercise extreme caution!

Swallowing risk

NdFeB magnets are not intended for children. Accidental ingestion of a few magnets may result in them attracting across intestines, which constitutes a direct threat to life and requires urgent medical intervention.

Do not drill into magnets

Mechanical processing of NdFeB material poses a fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Nickel coating and allergies

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction appears, immediately stop working with magnets and wear gloves.

Fragile material

Despite metallic appearance, neodymium is delicate and not impact-resistant. Do not hit, as the magnet may shatter into hazardous fragments.

Do not underestimate power

Use magnets with awareness. Their powerful strength can shock even experienced users. Plan your moves and respect their force.

Important! Learn more about hazards in the article: Magnet Safety Guide.

MP 25x5x5 / N38 - ring magnet

Physical properties - MP 25x5x5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical modeling of the product - technical parameters

Table 1: Static force (force vs distance) - power drop MP 25x5x5 / N38

Table 2: Vertical capacity (wall) MP 25x5x5 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces MP 25x5x5 / N38

Table 4: Steel thickness (saturation) - sheet metal selection MP 25x5x5 / N38

Table 5: Thermal stability (material behavior) - thermal limit MP 25x5x5 / N38

Table 6: Two magnets (attraction) - field range MP 25x5x5 / N38

Table 7: Safety (HSE) (electronics) - warnings MP 25x5x5 / N38

Table 8: Impact energy (cracking risk) - warning MP 25x5x5 / N38

Table 9: Surface protection spec MP 25x5x5 / N38

Table 10: Electrical data (Flux) MP 25x5x5 / N38

Table 11: Underwater work (magnet fishing) MP 25x5x5 / N38

1. Sliding resistance

2. Plate thickness effect

3. Power loss vs temp

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

Material specification

Environmental data

Magnet pull force

Field Strength

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Advantages as well as disadvantages of Nd2Fe14B magnets.

Benefits

Cons

Pull force analysis

Optimal lifting capacity of a neodymium magnet – what it depends on?

Magnet lifting force in use – key factors

H&S for magnets

GPS Danger

Safe distance

Power loss in heat

Medical interference

Crushing risk

Swallowing risk

Do not drill into magnets

Nickel coating and allergies

Fragile material

Do not underestimate power

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs distance) - power drop
MP 25x5x5 / N38

Table 2: Vertical capacity (wall)
MP 25x5x5 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MP 25x5x5 / N38

Table 4: Steel thickness (saturation) - sheet metal selection
MP 25x5x5 / N38

Table 5: Thermal stability (material behavior) - thermal limit
MP 25x5x5 / N38

Table 6: Two magnets (attraction) - field range
MP 25x5x5 / N38

Table 7: Safety (HSE) (electronics) - warnings
MP 25x5x5 / N38

Table 8: Impact energy (cracking risk) - warning
MP 25x5x5 / N38

Table 9: Surface protection spec
MP 25x5x5 / N38

Table 10: Electrical data (Flux)
MP 25x5x5 / N38

Table 11: Underwater work (magnet fishing)
MP 25x5x5 / N38

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.