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MP 40x10.4/5.5x5 / 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 030249

GTIN/EAN: 5906301812258

5.00

Diameter

40 mm [±0,1 mm]

internal diameter Ø

10.4/5.5 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

46.23 g

Magnetization Direction

↑ axial

Load capacity

9.47 kg / 92.86 N

Magnetic Induction

150.36 mT / 1504 Gs

Coating

[NiCuNi] Nickel

see technical specifications »

27.00 ZŁ with VAT / pcs + price for transport

21.95 ZŁ net + 23% VAT / pcs

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Detailed specification - MP 40x10.4/5.5x5 / N38 - ring magnet

Specification / characteristics - MP 40x10.4/5.5x5 / N38 - ring magnet

properties

properties	values
Cat. no.	030249
GTIN/EAN	5906301812258
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	40 mm [±0,1 mm]
internal diameter Ø	10.4/5.5 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	46.23 g
Magnetization Direction	↑ axial
Load capacity ~ ?	9.47 kg / 92.86 N
Magnetic Induction ~ ?	150.36 mT / 1504 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 40x10.4/5.5x5 / 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

Physical simulation of the product - report

The following data represent the outcome of a mathematical analysis. Results rely on algorithms for the class Nd₂Fe₁₄B. Operational performance might slightly differ. Please consider these data as a reference point during assembly planning.

Table 1: Static force (force vs distance) - power drop
MP 40x10.4/5.5x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	1289 Gs 128.9 mT	9.47 kg / 20.88 LBS 9470.0 g / 92.9 N	warning
1 mm	1265 Gs 126.5 mT	9.12 kg / 20.11 LBS 9120.9 g / 89.5 N	warning
2 mm	1232 Gs 123.2 mT	8.66 kg / 19.10 LBS 8662.7 g / 85.0 N	warning
3 mm	1193 Gs 119.3 mT	8.12 kg / 17.90 LBS 8121.3 g / 79.7 N	warning
5 mm	1099 Gs 109.9 mT	6.89 kg / 15.18 LBS 6887.8 g / 67.6 N	warning
10 mm	825 Gs 82.5 mT	3.88 kg / 8.56 LBS 3882.0 g / 38.1 N	warning
15 mm	580 Gs 58.0 mT	1.92 kg / 4.22 LBS 1915.5 g / 18.8 N	low risk
20 mm	399 Gs 39.9 mT	0.91 kg / 2.00 LBS 908.3 g / 8.9 N	low risk
30 mm	195 Gs 19.5 mT	0.22 kg / 0.48 LBS 217.6 g / 2.1 N	low risk
50 mm	61 Gs 6.1 mT	0.02 kg / 0.05 LBS 21.0 g / 0.2 N	low risk

Pulling power drops sharply with every subsequent millimeter of spacing. Keep in mind that even a very thin break (e.g., contamination, varnish, dust) significantly weakens the grip. Magnetic products operate optimally in perfect adhesion; air break weakens the power. Notice how flashily the parameters drop, when the magnet does not touch flatly to the metal substrate. When planning the arrangement, eliminate additional spacers.

Table 2: Vertical hold (wall)
MP 40x10.4/5.5x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.89 kg / 4.18 LBS 1894.0 g / 18.6 N
1 mm	Stal (~0.2)	1.82 kg / 4.02 LBS 1824.0 g / 17.9 N
2 mm	Stal (~0.2)	1.73 kg / 3.82 LBS 1732.0 g / 17.0 N
3 mm	Stal (~0.2)	1.62 kg / 3.58 LBS 1624.0 g / 15.9 N
5 mm	Stal (~0.2)	1.38 kg / 3.04 LBS 1378.0 g / 13.5 N
10 mm	Stal (~0.2)	0.78 kg / 1.71 LBS 776.0 g / 7.6 N
15 mm	Stal (~0.2)	0.38 kg / 0.85 LBS 384.0 g / 3.8 N
20 mm	Stal (~0.2)	0.18 kg / 0.40 LBS 182.0 g / 1.8 N
30 mm	Stal (~0.2)	0.04 kg / 0.10 LBS 44.0 g / 0.4 N
50 mm	Stal (~0.2)	0.00 kg / 0.01 LBS 4.0 g / 0.0 N

The table below shows the theoretical shear load necessary to start the slippage of the magnet vertically on a vertical steel wall (assuming standard friction coefficient). The holding force depends on the separation distance between the magnet and the surface.

Table 3: Vertical assembly (shearing) - vertical pull
MP 40x10.4/5.5x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.84 kg / 6.26 LBS 2841.0 g / 27.9 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.89 kg / 4.18 LBS 1894.0 g / 18.6 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.95 kg / 2.09 LBS 947.0 g / 9.3 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	4.74 kg / 10.44 LBS 4735.0 g / 46.5 N

When hanging a holder on a upright plane (e.g., a car body), it will maintain only about 1/5 of its maximum pull force. Gravity and a weak degree of grip cause that holders slide down easier than they pop off the substrate. Planning a vertical fastening? Remember that the sliding force is significantly lower than the perpendicular breakaway force. On a smooth steel, the holder will slide down under a much lighter weight. Application of an anti-slip coating can drastically increase the grip.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MP 40x10.4/5.5x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.95 kg / 2.09 LBS 947.0 g / 9.3 N
1 mm	25%	2.37 kg / 5.22 LBS 2367.5 g / 23.2 N
2 mm	50%	4.74 kg / 10.44 LBS 4735.0 g / 46.5 N
3 mm	75%	7.10 kg / 15.66 LBS 7102.5 g / 69.7 N
5 mm	100%	9.47 kg / 20.88 LBS 9470.0 g / 92.9 N
10 mm	100%	9.47 kg / 20.88 LBS 9470.0 g / 92.9 N
11 mm	100%	9.47 kg / 20.88 LBS 9470.0 g / 92.9 N
12 mm	100%	9.47 kg / 20.88 LBS 9470.0 g / 92.9 N

A thin metal plate cannot conduct the entire magnetic field, which squanders power of the holder. If you install a neodymium to a too thin substrate, the field will penetrate right through and the pull force will drop sharply. To squeeze the maximum of this neodymium's power, you need a suitably thick piece of metal. The material oversaturation causes that on thin elements (e.g., appliance housings), the magnet shows lower pull force. We suggest choosing the steel cross-section based on the following data.

Table 5: Working in heat (material behavior) - resistance threshold
MP 40x10.4/5.5x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	9.47 kg / 20.88 LBS 9470.0 g / 92.9 N	OK
40 °C	-2.2%	9.26 kg / 20.42 LBS 9261.7 g / 90.9 N	OK
60 °C	-4.4%	9.05 kg / 19.96 LBS 9053.3 g / 88.8 N
80 °C	-6.6%	8.84 kg / 19.50 LBS 8845.0 g / 86.8 N
100 °C	-28.8%	6.74 kg / 14.86 LBS 6742.6 g / 66.1 N

Classic neodymiums irreversibly lose strength past the thermal threshold. Protect against heat – heat can permanently destroy this product. With increasing heat, the magnet's power momentarily drops. Refrain from using this product in hot environments higher than its safe range. Exceeding the critical threshold will result in destruction of magnetism.

*Engineering note: Thermal stability depends not only on the material grade, as well as the dimension ratios. Thin magnets (pancake types) are more susceptible to demagnetization sooner than taller cylinders. The danger warning in the table points to permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MP 40x10.4/5.5x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	10.73 kg / 23.65 LBS 2 424 Gs	1.61 kg / 3.55 LBS 1609 g / 15.8 N	N/A
1 mm	10.55 kg / 23.25 LBS 2 555 Gs	1.58 kg / 3.49 LBS 1582 g / 15.5 N	9.49 kg / 20.93 LBS ~0 Gs
2 mm	10.33 kg / 22.78 LBS 2 529 Gs	1.55 kg / 3.42 LBS 1550 g / 15.2 N	9.30 kg / 20.50 LBS ~0 Gs
3 mm	10.09 kg / 22.23 LBS 2 499 Gs	1.51 kg / 3.34 LBS 1513 g / 14.8 N	9.08 kg / 20.01 LBS ~0 Gs
5 mm	9.52 kg / 20.98 LBS 2 427 Gs	1.43 kg / 3.15 LBS 1427 g / 14.0 N	8.56 kg / 18.88 LBS ~0 Gs
10 mm	7.80 kg / 17.20 LBS 2 198 Gs	1.17 kg / 2.58 LBS 1170 g / 11.5 N	7.02 kg / 15.48 LBS ~0 Gs
20 mm	4.40 kg / 9.69 LBS 1 650 Gs	0.66 kg / 1.45 LBS 660 g / 6.5 N	3.96 kg / 8.72 LBS ~0 Gs
50 mm	0.49 kg / 1.09 LBS 553 Gs	0.07 kg / 0.16 LBS 74 g / 0.7 N	0.44 kg / 0.98 LBS ~0 Gs
60 mm	0.25 kg / 0.54 LBS 391 Gs	0.04 kg / 0.08 LBS 37 g / 0.4 N	0.22 kg / 0.49 LBS ~0 Gs
70 mm	0.13 kg / 0.28 LBS 282 Gs	0.02 kg / 0.04 LBS 19 g / 0.2 N	0.12 kg / 0.26 LBS ~0 Gs
80 mm	0.07 kg / 0.15 LBS 209 Gs	0.01 kg / 0.02 LBS 11 g / 0.1 N	0.06 kg / 0.14 LBS ~0 Gs
90 mm	0.04 kg / 0.09 LBS 158 Gs	0.01 kg / 0.01 LBS 6 g / 0.1 N	0.04 kg / 0.08 LBS ~0 Gs
100 mm	0.02 kg / 0.05 LBS 121 Gs	0.00 kg / 0.01 LBS 4 g / 0.0 N	0.02 kg / 0.05 LBS ~0 Gs

Two magnetic products interact from a significantly greater distance than a neodymium and metal combination. The setup of magnet-to-magnet creates a more powerful interaction and a wider radius of action. Want to build a strong closure? Utilize two neodymiums instead of a neodymium and a steel. Be careful that when connecting a pair of magnets, the collision energy is extreme. The levitation is a bit weaker than the attraction, but still large.
*Field value in repulsion mode is approximately ~0 Gs at the midpoint of the gap (resulting from vector opposition).
Important: Estimates show sliding force of dual same neodymium magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Protective zones (implants) - precautionary measures
MP 40x10.4/5.5x5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	12.5 cm
Hearing aid	10 Gs (1.0 mT)	10.0 cm
Timepiece	20 Gs (2.0 mT)	8.0 cm
Phone / Smartphone	40 Gs (4.0 mT)	6.0 cm
Remote	50 Gs (5.0 mT)	5.5 cm
Payment card	400 Gs (40.0 mT)	2.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.5 cm

Extremely neodym field is a real danger to IT equipment as well as medical implants. These magnets produce a flux that disrupts operation of sensitive medical devices. Notice: the unseen radiation acts through matter and housings. Increased vigilance must be taken by people with hearing aids and drug dispensers. The risk also applies to: automatic timepieces, remotes, membranes, and displays. Avoid contact with magnetic cards, hard drives, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - collision effects
MP 40x10.4/5.5x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	17.75 km/h (4.93 m/s)	0.56 J
30 mm	25.36 km/h (7.04 m/s)	1.15 J
50 mm	32.32 km/h (8.98 m/s)	1.86 J
100 mm	45.65 km/h (12.68 m/s)	3.72 J

Neodymium magnets are prone to chipping – a strong collision with metal risks their cracking. Control the attraction moment – a neodymium left loose becomes dangerous. Kinetic force can cause material chips or painful pinches to skin. Always hold the magnet during mounting so it doesn't hit violently against the steel surface. A collision at high speed almost guarantees destruction of the neodymium. Wear safety glasses when working with powerful specimens.

Table 9: Anti-corrosion coating durability
MP 40x10.4/5.5x5 / 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 SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Electrical data (P_c)
MP 40x10.4/5.5x5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	17 767 Mx	177.7 µWb
P_c Coefficient	0.17	Low (Flat)

Total magnetic flux emitted by the magnet pole. Key data for generator designers as well as sensors. P_c value defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MP 40x10.4/5.5x5 / N38

Environment	Effective steel pull	Effect
Air (land)	9.47 kg	Standard
Water (riverbed)	10.84 kg (+1.37 kg buoyancy gain)	+14.5%

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

In water, the magnet feels stronger thanks to Archimedes' principle. However, remember the water resistance when pulling the rope quickly.

1. Vertical hold

*Caution: On a vertical surface, the magnet holds just approx. 20-30% of its max power.

2. Steel saturation

*Thin metal sheet (e.g. computer case) significantly limits the holding force.

3. Power loss vs temp

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

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.17

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

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%

Sustainability

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: 030249-2026

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It is ideally suited for places where solid attachment of the magnet to the substrate is required without the risk of detachment. Mounting is clean and reversible, unlike gluing. This product with a force of 9.47 kg works great as a door latch, speaker holder, or mounting element in devices.

This is a crucial issue when working with model MP 40x10.4/5.5x5 / N38. Neodymium magnets are sintered ceramics, which means they are hard but breakable and inelastic. When tightening the screw, you must maintain great sensitivity. 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.

Moisture can penetrate micro-cracks in the coating and cause oxidation of the magnet. Damage to the protective layer during assembly is the most common cause of rusting. This product is dedicated for indoor use. For outdoor applications, we recommend choosing rubberized holders or additional protection with varnish.

A screw or bolt with a thread diameter smaller than 10.4/5.5 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.

It is a magnetic ring with a diameter of 40 mm and thickness 5 mm. The key parameter here is the lifting capacity amounting to approximately 9.47 kg (force ~92.86 N). The mounting hole diameter is precisely 10.4/5.5 mm.

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

Pros and cons of rare earth magnets.

Benefits

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:

They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (based on calculations),
Magnets effectively defend themselves against loss of magnetization caused by foreign field sources,
Thanks to the smooth finish, the layer of Ni-Cu-Ni, gold, or silver gives an visually attractive appearance,
They show high magnetic induction at the operating surface, which affects their effectiveness,
Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
Possibility of accurate machining and optimizing to specific applications,
Universal use in future technologies – they find application in magnetic memories, electric drive systems, medical devices, also complex engineering applications.
Thanks to their power density, small magnets offer high operating force, in miniature format,

Weaknesses

Disadvantages of neodymium magnets:

At strong impacts they can crack, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
Due to limitations in creating nuts and complex forms in magnets, we propose using cover - magnetic mechanism.
Health risk resulting from small fragments of magnets are risky, when accidentally swallowed, which gains importance in the context of child safety. Furthermore, tiny parts of these magnets are able to complicate diagnosis medical in case of swallowing.
High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities

Holding force characteristics

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

The force parameter is a result of laboratory testing executed under standard conditions:

using a base made of mild steel, serving as a ideal flux conductor
whose thickness reaches at least 10 mm
with a surface cleaned and smooth
with direct contact (no paint)
under axial force direction (90-degree angle)
in temp. approx. 20°C

Impact of factors on magnetic holding capacity in practice

It is worth knowing that the application force will differ influenced by elements below, in order of importance:

Gap between surfaces – even a fraction of a millimeter of distance (caused e.g. by veneer or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
Force direction – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet exhibits much less (typically approx. 20-30% of nominal force).
Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
Steel grade – the best choice is pure iron steel. Stainless steels may generate lower lifting capacity.
Surface finish – ideal contact is obtained only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
Temperature influence – high temperature weakens magnetic field. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was performed on a smooth plate of suitable thickness, under a perpendicular pulling force, however under attempts to slide the magnet the lifting capacity is smaller. In addition, even a small distance between the magnet’s surface and the plate decreases the lifting capacity.

Precautions when working with NdFeB magnets

Shattering risk

Protect your eyes. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.

Electronic hazard

Avoid bringing magnets close to a purse, computer, or TV. The magnetic field can destroy these devices and wipe information from cards.

Do not give to children

Product intended for adults. Tiny parts can be swallowed, leading to serious injuries. Store out of reach of kids and pets.

Caution required

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

Demagnetization risk

Avoid heat. NdFeB magnets are susceptible to temperature. If you require operation above 80°C, inquire about special high-temperature series (H, SH, UH).

Medical implants

For implant holders: Powerful magnets disrupt electronics. Keep minimum 30 cm distance or request help to handle the magnets.

Warning for allergy sufferers

It is widely known that nickel (the usual finish) is a common allergen. If your skin reacts to metals, prevent direct skin contact and choose coated magnets.

Dust explosion hazard

Fire hazard: Rare earth powder is explosive. Do not process magnets without safety gear as this risks ignition.

Finger safety

Danger of trauma: The attraction force is so immense that it can result in hematomas, crushing, and broken bones. Use thick gloves.

Impact on smartphones

Be aware: neodymium magnets produce a field that confuses sensitive sensors. Maintain a separation from your phone, tablet, and GPS.

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

MP 40x10.4/5.5x5 / N38 - ring magnet

Detailed specification - MP 40x10.4/5.5x5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical simulation of the product - report

Table 1: Static force (force vs distance) - power drop MP 40x10.4/5.5x5 / N38

Table 2: Vertical hold (wall) MP 40x10.4/5.5x5 / N38

Table 3: Vertical assembly (shearing) - vertical pull MP 40x10.4/5.5x5 / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection MP 40x10.4/5.5x5 / N38

Table 5: Working in heat (material behavior) - resistance threshold MP 40x10.4/5.5x5 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system MP 40x10.4/5.5x5 / N38

Table 7: Protective zones (implants) - precautionary measures MP 40x10.4/5.5x5 / N38

Table 8: Dynamics (cracking risk) - collision effects MP 40x10.4/5.5x5 / N38

Table 9: Anti-corrosion coating durability MP 40x10.4/5.5x5 / N38

Table 10: Electrical data (Pc) MP 40x10.4/5.5x5 / N38

Table 11: Hydrostatics and buoyancy MP 40x10.4/5.5x5 / N38

1. Vertical hold

2. Steel saturation

3. Power loss vs temp

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

Chemical composition

Sustainability

Magnet pull force

Field Strength

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Pros and cons of rare earth magnets.

Benefits

Weaknesses

Holding force characteristics

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

Impact of factors on magnetic holding capacity in practice

Precautions when working with NdFeB magnets

Shattering risk

Electronic hazard

Do not give to children

Caution required

Demagnetization risk

Medical implants

Warning for allergy sufferers

Dust explosion hazard

Finger safety

Impact on smartphones

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs distance) - power drop
MP 40x10.4/5.5x5 / N38

Table 2: Vertical hold (wall)
MP 40x10.4/5.5x5 / N38

Table 3: Vertical assembly (shearing) - vertical pull
MP 40x10.4/5.5x5 / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection
MP 40x10.4/5.5x5 / N38

Table 5: Working in heat (material behavior) - resistance threshold
MP 40x10.4/5.5x5 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MP 40x10.4/5.5x5 / N38

Table 7: Protective zones (implants) - precautionary measures
MP 40x10.4/5.5x5 / N38

Table 8: Dynamics (cracking risk) - collision effects
MP 40x10.4/5.5x5 / N38

Table 9: Anti-corrosion coating durability
MP 40x10.4/5.5x5 / N38

Table 10: Electrical data (P_c)
MP 40x10.4/5.5x5 / N38

Table 11: Hydrostatics and buoyancy
MP 40x10.4/5.5x5 / N38