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MP 25x8x5 / 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 030196

GTIN/EAN: 5906301812135

5.00

Diameter

25 mm [±0,1 mm]

internal diameter Ø

8 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

16.52 g

Magnetization Direction

↑ axial

Load capacity

7.16 kg / 70.21 N

Magnetic Induction

230.20 mT / 2302 Gs

Coating

[NiCuNi] Nickel

see parameters »

5.90 ZŁ with VAT / pcs + price for transport

4.80 ZŁ net + 23% VAT / pcs

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Technical details - MP 25x8x5 / N38 - ring magnet

Specification / characteristics - MP 25x8x5 / N38 - ring magnet

properties

properties	values
Cat. no.	030196
GTIN/EAN	5906301812135
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	8 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	16.52 g
Magnetization Direction	↑ axial
Load capacity ~ ?	7.16 kg / 70.21 N
Magnetic Induction ~ ?	230.20 mT / 2302 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 25x8x5 / 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

Engineering analysis of the assembly - technical parameters

These values are the direct effect of a mathematical calculation. Results are based on algorithms for the class Nd₂Fe₁₄B. Operational performance might slightly differ from theoretical values. Use these calculations as a preliminary roadmap during assembly planning.

Table 1: Static pull force (pull vs gap) - characteristics
MP 25x8x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5777 Gs 577.7 mT	7.16 kg / 15.79 LBS 7160.0 g / 70.2 N	strong
1 mm	5310 Gs 531.0 mT	6.05 kg / 13.33 LBS 6048.6 g / 59.3 N	strong
2 mm	4846 Gs 484.6 mT	5.04 kg / 11.10 LBS 5036.9 g / 49.4 N	strong
3 mm	4397 Gs 439.7 mT	4.15 kg / 9.15 LBS 4148.2 g / 40.7 N	strong
5 mm	3576 Gs 357.6 mT	2.74 kg / 6.05 LBS 2743.2 g / 26.9 N	strong
10 mm	2073 Gs 207.3 mT	0.92 kg / 2.03 LBS 921.6 g / 9.0 N	safe
15 mm	1231 Gs 123.1 mT	0.33 kg / 0.72 LBS 325.2 g / 3.2 N	safe
20 mm	773 Gs 77.3 mT	0.13 kg / 0.28 LBS 128.0 g / 1.3 N	safe
30 mm	356 Gs 35.6 mT	0.03 kg / 0.06 LBS 27.2 g / 0.3 N	safe
50 mm	115 Gs 11.5 mT	0.00 kg / 0.01 LBS 2.8 g / 0.0 N	safe

Magnetic force weakens sharply with every mm of spacing. Note that even the smallest gap (e.g., contamination, varnish, veneer) noticeably weakens the grip. Magnetic products operate optimally at the point of direct contact; gap nullifies the force. See how flashily the pull force fall, when the product does not touch tightly to the steel surface. When planning the mounting, eliminate redundant distances.

Table 2: Sliding capacity (wall)
MP 25x8x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.43 kg / 3.16 LBS 1432.0 g / 14.0 N
1 mm	Stal (~0.2)	1.21 kg / 2.67 LBS 1210.0 g / 11.9 N
2 mm	Stal (~0.2)	1.01 kg / 2.22 LBS 1008.0 g / 9.9 N
3 mm	Stal (~0.2)	0.83 kg / 1.83 LBS 830.0 g / 8.1 N
5 mm	Stal (~0.2)	0.55 kg / 1.21 LBS 548.0 g / 5.4 N
10 mm	Stal (~0.2)	0.18 kg / 0.41 LBS 184.0 g / 1.8 N
15 mm	Stal (~0.2)	0.07 kg / 0.15 LBS 66.0 g / 0.6 N
20 mm	Stal (~0.2)	0.03 kg / 0.06 LBS 26.0 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

This section indicates the theoretical holding capacity sufficient to initiate the downward movement of the magnet vertically on a upright metal surface (assuming standard friction). This value is relative to the distance between the magnet and the metal.

Table 3: Wall mounting (shearing) - vertical pull
MP 25x8x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.15 kg / 4.74 LBS 2148.0 g / 21.1 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.43 kg / 3.16 LBS 1432.0 g / 14.0 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.72 kg / 1.58 LBS 716.0 g / 7.0 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.58 kg / 7.89 LBS 3580.0 g / 35.1 N

When mounting a element on a upright wall (e.g., a board), it will maintain only about 20%-30% of its nominal power. Gravitational force as well as a weak degree of grip mean that magnets slide down easier than they pop off the substrate. Designing a vertical fastening? Remember that the shear force is noticeably lower than the perpendicular breakaway force. On a smooth steel, the magnet will give way down under a much lighter cargo. Using a rubber layer can significantly raise the stability.

Table 4: Steel thickness (substrate influence) - power losses
MP 25x8x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.72 kg / 1.58 LBS 716.0 g / 7.0 N
1 mm	25%	1.79 kg / 3.95 LBS 1790.0 g / 17.6 N
2 mm	50%	3.58 kg / 7.89 LBS 3580.0 g / 35.1 N
3 mm	75%	5.37 kg / 11.84 LBS 5370.0 g / 52.7 N
5 mm	100%	7.16 kg / 15.79 LBS 7160.0 g / 70.2 N
10 mm	100%	7.16 kg / 15.79 LBS 7160.0 g / 70.2 N
11 mm	100%	7.16 kg / 15.79 LBS 7160.0 g / 70.2 N
12 mm	100%	7.16 kg / 15.79 LBS 7160.0 g / 70.2 N

A thin sheet is unable to focus the full magnetic flux, which weakens actual performance of the holder. If you mount a strong magnet to a weak sheet, the flux will penetrate right through and the pull force will drop sharply. To utilize the maximum of this neodymium's power, you need a suitably thick element of steel. The saturation effect means that on delicate walls (e.g., thin profiles), the holder works worse. We suggest choosing the steel thickness from these parameters.

Table 5: Thermal resistance (material behavior) - thermal limit
MP 25x8x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	7.16 kg / 15.79 LBS 7160.0 g / 70.2 N	OK
40 °C	-2.2%	7.00 kg / 15.44 LBS 7002.5 g / 68.7 N	OK
60 °C	-4.4%	6.84 kg / 15.09 LBS 6845.0 g / 67.1 N	OK
80 °C	-6.6%	6.69 kg / 14.74 LBS 6687.4 g / 65.6 N
100 °C	-28.8%	5.10 kg / 11.24 LBS 5097.9 g / 50.0 N

Standard neodymium magnets lose power above the temperature limit. Protect against heat – heat can permanently damage this magnet. As the temperature rises, the magnet's capacity momentarily lowers. Do not use this product in hot environments higher than its safe range. Too high temperature will result in irreversible degradation of magnetism.

*Engineering note: Thermal stability depends not only on the material grade, but also on the magnet's shape. Flat magnets (low permeance coefficient) risk losing magnetic properties at lower temperatures than long magnets. Warning indicator in the table signals a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (repulsion) - forces in the system
MP 25x8x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding 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 strong neodymiums attract each other from a wider radius than a magnet and sheet combination. The connection of two magnets produces a massive flux and a wider radius of operation. Designing a solid fastener? Utilize two neodymiums instead of one magnet and a striker plate. Be careful that when connecting a pair of magnets, the impact force is huge. The levitation is a bit weaker than the attraction, but still impressive.
*Field value in repulsion mode reaches ~0 Gs at the midpoint between the magnets (resulting from vector opposition).
Note: Calculations refer to shear force of a pair of same magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Safety (HSE) (electronics) - warnings
MP 25x8x5 / 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
Timepiece	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

Powerful magnet radiation poses a serious hazard to electronic devices as well as medical implants. These neodymiums produce a field that disrupts operation of sensitive medical devices. Remember: the unseen radiation acts through matter and plastic. Increased vigilance must be taken by people with cochlear implants and drug dispensers. The risk also applies to: automatic timepieces, car keys, membranes, and screens. Do not place the magnet near cards, HDD media, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - collision effects
MP 25x8x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	22.62 km/h (6.28 m/s)	0.33 J
30 mm	36.45 km/h (10.13 m/s)	0.85 J
50 mm	46.96 km/h (13.04 m/s)	1.41 J
100 mm	66.40 km/h (18.44 m/s)	2.81 J

NdFeB products are very brittle – a violent impact against metal causes immediate chipping. Watch the impact speed – a neodymium left loose speeds with massive force. Kinetic force can cause material chips or dangerous crushing to skin. Be sure to control the product during installation so it doesn't slam with momentum against the steel surface. A collision at high speed ends with a crack of the neodymium. Use safety goggles when playing with powerful specimens.

Table 9: Anti-corrosion coating durability
MP 25x8x5 / 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. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Construction data (Flux)
MP 25x8x5 / 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. Key data for generator designers as well as sensors. The P_c coefficient determines the working geometry.

Table 11: Hydrostatics and buoyancy
MP 25x8x5 / N38

Environment	Effective steel pull	Effect
Air (land)	7.16 kg	Standard
Water (riverbed)	8.20 kg (+1.04 kg buoyancy gain)	+14.5%

Warning: 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. However, remember the water resistance when pulling the rope quickly.

1. Wall mount (shear)

*Caution: On a vertical surface, the magnet holds just a fraction of its nominal pull.

2. Plate thickness effect

*Thin metal sheet (e.g. 0.5mm PC case) severely reduces the holding force.

3. Temperature resistance

*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

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: 030196-2026

Magnet Unit Converter

Pulling force

Newtons (N)

Pounds (lbs)

Field Strength

Induction (Gs)

Just complete one field, and the converter fill in everything else instantly.

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The ring-shaped magnet MP 25x8x5 / N38 is created for mechanical fastening, 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 25x8x5 / N38. Neodymium magnets are sintered ceramics, which means they are very brittle and inelastic. One turn too many can destroy the magnet, so do it slowly. The flat screw head should evenly press the magnet. 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. This product is dedicated for inside building use. For outdoor applications, we recommend choosing rubberized holders or additional protection with varnish.

The inner hole diameter determines the maximum size of the mounting element. 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. 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.

This model is characterized by dimensions Ø25x5 mm and a weight of 16.52 g. The pulling force of this model is an impressive 7.16 kg, which translates to 70.21 N in newtons. The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 8 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). When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Strengths and weaknesses of neodymium magnets.

Benefits

Besides their remarkable pulling force, neodymium magnets offer the following advantages:

Their power remains stable, and after around ten years it decreases only by ~1% (according to research),
Neodymium magnets are extremely resistant to loss of magnetic properties caused by magnetic disturbances,
Thanks to the smooth finish, the coating of Ni-Cu-Ni, gold, or silver gives an professional appearance,
Magnets exhibit very high magnetic induction on the active area,
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 the ability of accurate forming and customization to specialized projects, neodymium magnets can be produced in a variety of geometric configurations, which increases their versatility,
Versatile presence in modern industrial fields – they find application in computer drives, brushless drives, medical devices, and multitasking production systems.
Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which enables their usage in small systems

Weaknesses

Drawbacks and weaknesses of neodymium magnets and proposals for their use:

They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only protects the magnet but also improves its resistance to damage
We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
We recommend casing - magnetic holder, due to difficulties in creating nuts inside the magnet and complicated shapes.
Health risk to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the context of child health protection. Additionally, tiny parts of these magnets can complicate diagnosis medical after entering the body.
High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which hinders application in large quantities

Pull force analysis

Detachment force of the magnet in optimal conditions – what it depends on?

The specified lifting capacity refers to the maximum value, measured under ideal test conditions, namely:

with the application of a sheet made of low-carbon steel, ensuring full magnetic saturation
possessing a massiveness of minimum 10 mm to ensure full flux closure
with a surface perfectly flat
with total lack of distance (no impurities)
under vertical force vector (90-degree angle)
at ambient temperature approx. 20 degrees Celsius

Practical lifting capacity: influencing factors

Effective lifting capacity impacted by working environment parameters, mainly (from most important):

Distance – existence of foreign body (paint, dirt, air) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
Direction of force – highest force is reached only during perpendicular pulling. The shear force of the magnet along the surface is usually several times smaller (approx. 1/5 of the lifting capacity).
Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of converting into lifting capacity.
Steel type – mild steel attracts best. Alloy admixtures lower magnetic permeability and lifting capacity.
Surface structure – the more even the plate, the larger the contact zone and higher the lifting capacity. Roughness acts like micro-gaps.
Thermal factor – high temperature weakens magnetic field. Too high temperature can permanently damage the magnet.

Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the holding force is lower. Moreover, even a small distance between the magnet and the plate lowers the holding force.

Safety rules for work with neodymium magnets

Power loss in heat

Do not overheat. NdFeB magnets are sensitive to heat. If you need operation above 80°C, look for HT versions (H, SH, UH).

Warning for heart patients

Patients with a pacemaker have to maintain an absolute distance from magnets. The magnetic field can interfere with the functioning of the implant.

Magnet fragility

Neodymium magnets are sintered ceramics, meaning they are fragile like glass. Impact of two magnets leads to them cracking into small pieces.

Avoid contact if allergic

Nickel alert: The nickel-copper-nickel coating consists of nickel. If skin irritation happens, cease working with magnets and wear gloves.

Mechanical processing

Drilling and cutting of neodymium magnets carries a risk of fire hazard. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Product not for children

Absolutely keep magnets out of reach of children. Choking hazard is high, and the effects of magnets clamping inside the body are tragic.

Keep away from computers

Intense magnetic fields can destroy records on payment cards, hard drives, and other magnetic media. Stay away of at least 10 cm.

Precision electronics

Navigation devices and mobile phones are extremely sensitive to magnetism. Direct contact with a strong magnet can decalibrate the sensors in your phone.

Bone fractures

Big blocks can crush fingers instantly. Do not place your hand betwixt two strong magnets.

Powerful field

Handle with care. Rare earth magnets attract from a distance and connect with massive power, often quicker than you can move away.

Security! Details about hazards in the article: Safety of working with magnets.

MP 25x8x5 / N38 - ring magnet

Technical details - MP 25x8x5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering analysis of the assembly - technical parameters

Table 1: Static pull force (pull vs gap) - characteristics MP 25x8x5 / N38

Table 2: Sliding capacity (wall) MP 25x8x5 / N38

Table 3: Wall mounting (shearing) - vertical pull MP 25x8x5 / N38

Table 4: Steel thickness (substrate influence) - power losses MP 25x8x5 / N38

Table 5: Thermal resistance (material behavior) - thermal limit MP 25x8x5 / N38

Table 6: Two magnets (repulsion) - forces in the system MP 25x8x5 / N38

Table 7: Safety (HSE) (electronics) - warnings MP 25x8x5 / N38

Table 8: Collisions (cracking risk) - collision effects MP 25x8x5 / N38

Table 9: Anti-corrosion coating durability MP 25x8x5 / N38

Table 10: Construction data (Flux) MP 25x8x5 / N38

Table 11: Hydrostatics and buoyancy MP 25x8x5 / N38

1. Wall mount (shear)

2. Plate thickness effect

3. Temperature resistance

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

Elemental analysis

Ecology and recycling (GPSR)

Pulling force

Field Strength

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Strengths and weaknesses of neodymium magnets.

Benefits

Weaknesses

Pull force analysis

Detachment force of the magnet in optimal conditions – what it depends on?

Practical lifting capacity: influencing factors

Safety rules for work with neodymium magnets

Power loss in heat

Warning for heart patients

Magnet fragility

Avoid contact if allergic

Mechanical processing

Product not for children

Keep away from computers

Precision electronics

Bone fractures

Powerful field

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs gap) - characteristics
MP 25x8x5 / N38

Table 2: Sliding capacity (wall)
MP 25x8x5 / N38

Table 3: Wall mounting (shearing) - vertical pull
MP 25x8x5 / N38

Table 4: Steel thickness (substrate influence) - power losses
MP 25x8x5 / N38

Table 5: Thermal resistance (material behavior) - thermal limit
MP 25x8x5 / N38

Table 6: Two magnets (repulsion) - forces in the system
MP 25x8x5 / N38

Table 7: Safety (HSE) (electronics) - warnings
MP 25x8x5 / N38

Table 8: Collisions (cracking risk) - collision effects
MP 25x8x5 / N38

Table 9: Anti-corrosion coating durability
MP 25x8x5 / N38

Table 10: Construction data (Flux)
MP 25x8x5 / N38

Table 11: Hydrostatics and buoyancy
MP 25x8x5 / N38