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MP 15x7/3.5x5 / 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 030390

GTIN/EAN: 5906301812302

5.00

Diameter

15 mm [±0,1 mm]

internal diameter Ø

7/3.5 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

6.27 g

Magnetization Direction

↑ axial

Load capacity

5.09 kg / 49.95 N

Magnetic Induction

343.70 mT / 3437 Gs

Coating

[NiCuNi] Nickel

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3.44 ZŁ with VAT / pcs + price for transport

2.80 ZŁ net + 23% VAT / pcs

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Detailed specification - MP 15x7/3.5x5 / N38 - ring magnet

Specification / characteristics - MP 15x7/3.5x5 / N38 - ring magnet

properties

properties	values
Cat. no.	030390
GTIN/EAN	5906301812302
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	15 mm [±0,1 mm]
internal diameter Ø	7/3.5 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	6.27 g
Magnetization Direction	↑ axial
Load capacity ~ ?	5.09 kg / 49.95 N
Magnetic Induction ~ ?	343.70 mT / 3437 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 15x7/3.5x5 / 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 magnet - data

The following information are the direct effect of a mathematical calculation. Results are based on algorithms for the material Nd₂Fe₁₄B. Real-world parameters might slightly differ. Treat these data as a preliminary roadmap when designing systems.

Table 1: Static pull force (force vs distance) - interaction chart
MP 15x7/3.5x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	3054 Gs 305.4 mT	5.09 kg / 11.22 LBS 5090.0 g / 49.9 N	warning
1 mm	2736 Gs 273.6 mT	4.09 kg / 9.01 LBS 4085.7 g / 40.1 N	warning
2 mm	2372 Gs 237.2 mT	3.07 kg / 6.77 LBS 3069.9 g / 30.1 N	warning
3 mm	2007 Gs 200.7 mT	2.20 kg / 4.84 LBS 2197.4 g / 21.6 N	warning
5 mm	1377 Gs 137.7 mT	1.03 kg / 2.28 LBS 1034.5 g / 10.1 N	low risk
10 mm	526 Gs 52.6 mT	0.15 kg / 0.33 LBS 151.3 g / 1.5 N	low risk
15 mm	232 Gs 23.2 mT	0.03 kg / 0.06 LBS 29.3 g / 0.3 N	low risk
20 mm	118 Gs 11.8 mT	0.01 kg / 0.02 LBS 7.6 g / 0.1 N	low risk
30 mm	42 Gs 4.2 mT	0.00 kg / 0.00 LBS 0.9 g / 0.0 N	low risk
50 mm	10 Gs 1.0 mT	0.00 kg / 0.00 LBS 0.1 g / 0.0 N	low risk

Grip strength weakens significantly per each millimeter of spacing. Note that even the smallest gap (e.g., contamination, varnish, dust) noticeably reduces the pull force. Magnetic products operate most effectively in perfect adhesion; distance drastically cuts the power. Observe how quickly the parameters drop, when the magnet does not touch flatly to the steel surface. When planning the assembly, avoid redundant distances.

Table 2: Shear capacity (wall)
MP 15x7/3.5x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.02 kg / 2.24 LBS 1018.0 g / 10.0 N
1 mm	Stal (~0.2)	0.82 kg / 1.80 LBS 818.0 g / 8.0 N
2 mm	Stal (~0.2)	0.61 kg / 1.35 LBS 614.0 g / 6.0 N
3 mm	Stal (~0.2)	0.44 kg / 0.97 LBS 440.0 g / 4.3 N
5 mm	Stal (~0.2)	0.21 kg / 0.45 LBS 206.0 g / 2.0 N
10 mm	Stal (~0.2)	0.03 kg / 0.07 LBS 30.0 g / 0.3 N
15 mm	Stal (~0.2)	0.01 kg / 0.01 LBS 6.0 g / 0.1 N
20 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 2.0 g / 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N

This section defines the approximate holding capacity sufficient to initiate the slippage of the magnet downwards against a upright steel wall (considering typical friction coefficient). The holding force varies with the gap size between the magnet and the surface.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MP 15x7/3.5x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.53 kg / 3.37 LBS 1527.0 g / 15.0 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.02 kg / 2.24 LBS 1018.0 g / 10.0 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.51 kg / 1.12 LBS 509.0 g / 5.0 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	2.55 kg / 5.61 LBS 2545.0 g / 25.0 N

When mounting a element on a upright plane (e.g., a car body), it you can count on only about 1/5 of its maximum pull force. Gravitational force as well as a low friction coefficient mean that holders slip faster than they detach. Want to create a hanger? Note that the sliding force is much weaker than the maximum static pull force. On a slippery surface, the holder will give way down under a much lighter cargo. Application of an anti-slip coating can significantly improve the result.

Table 4: Material efficiency (substrate influence) - power losses
MP 15x7/3.5x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.51 kg / 1.12 LBS 509.0 g / 5.0 N
1 mm	25%	1.27 kg / 2.81 LBS 1272.5 g / 12.5 N
2 mm	50%	2.55 kg / 5.61 LBS 2545.0 g / 25.0 N
3 mm	75%	3.82 kg / 8.42 LBS 3817.5 g / 37.4 N
5 mm	100%	5.09 kg / 11.22 LBS 5090.0 g / 49.9 N
10 mm	100%	5.09 kg / 11.22 LBS 5090.0 g / 49.9 N
11 mm	100%	5.09 kg / 11.22 LBS 5090.0 g / 49.9 N
12 mm	100%	5.09 kg / 11.22 LBS 5090.0 g / 49.9 N

A too thin steel cannot absorb the entire magnetic field, which weakens actual performance of the magnet. If you attach a powerful product to a weak sheet, the magnetism will penetrate right through and the holding will be smaller. To squeeze full efficiency of this neodymium's potential, you need a suitably thick backing of steel. The saturation phenomenon means that on thin elements (e.g., car bodies), the holder holds weaker. We advise picking the steel dimension according to the table below.

Table 5: Thermal resistance (material behavior) - power drop
MP 15x7/3.5x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	5.09 kg / 11.22 LBS 5090.0 g / 49.9 N	OK
40 °C	-2.2%	4.98 kg / 10.97 LBS 4978.0 g / 48.8 N	OK
60 °C	-4.4%	4.87 kg / 10.73 LBS 4866.0 g / 47.7 N
80 °C	-6.6%	4.75 kg / 10.48 LBS 4754.1 g / 46.6 N
100 °C	-28.8%	3.62 kg / 7.99 LBS 3624.1 g / 35.6 N

Ordinary NdFeB products lose power past the thermal threshold. Protect against heat – heat can irreversibly destroy this product. With every degree above norm, the magnet's force temporarily drops. Do not use this magnet close to heaters exceeding its working range. Exceeding the critical threshold will cause irreversible degradation of magnetic properties.

*Engineering note: Temperature resistance depends not only on the material grade, but also on the magnet's shape. Thin magnets (pancake types) risk losing magnetic properties at lower temperatures than taller cylinders. Red status in the table points to a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MP 15x7/3.5x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	8.17 kg / 18.00 LBS 4 643 Gs	1.22 kg / 2.70 LBS 1225 g / 12.0 N	N/A
1 mm	7.39 kg / 16.29 LBS 5 810 Gs	1.11 kg / 2.44 LBS 1108 g / 10.9 N	6.65 kg / 14.66 LBS ~0 Gs
2 mm	6.55 kg / 14.45 LBS 5 472 Gs	0.98 kg / 2.17 LBS 983 g / 9.6 N	5.90 kg / 13.01 LBS ~0 Gs
3 mm	5.72 kg / 12.62 LBS 5 113 Gs	0.86 kg / 1.89 LBS 858 g / 8.4 N	5.15 kg / 11.35 LBS ~0 Gs
5 mm	4.19 kg / 9.23 LBS 4 374 Gs	0.63 kg / 1.38 LBS 628 g / 6.2 N	3.77 kg / 8.31 LBS ~0 Gs
10 mm	1.66 kg / 3.66 LBS 2 753 Gs	0.25 kg / 0.55 LBS 249 g / 2.4 N	1.49 kg / 3.29 LBS ~0 Gs
20 mm	0.24 kg / 0.54 LBS 1 053 Gs	0.04 kg / 0.08 LBS 36 g / 0.4 N	0.22 kg / 0.48 LBS ~0 Gs
50 mm	0.00 kg / 0.01 LBS 134 Gs	0.00 kg / 0.00 LBS 1 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
60 mm	0.00 kg / 0.00 LBS 83 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
70 mm	0.00 kg / 0.00 LBS 55 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
80 mm	0.00 kg / 0.00 LBS 38 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
90 mm	0.00 kg / 0.00 LBS 27 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
100 mm	0.00 kg / 0.00 LBS 20 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs

Two strong neodymiums interact from a wider radius than a magnet and steel setup. The setup of two magnets produces a massive flux and a further horizon of performance. Designing a powerful holder? Utilize two neodymiums instead of one magnet and a steel. Exercise caution that when connecting a pair of magnets, the pinch force is huge. The levitation is marginally weaker than the attraction, but still impressive.
*Field value for N-N configuration reaches ~0 Gs at the midpoint of the gap (caused by magnetic field nullification).
Attention: Figures demonstrate shear force of a pair of same magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Protective zones (electronics) - precautionary measures
MP 15x7/3.5x5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	6.5 cm
Hearing aid	10 Gs (1.0 mT)	5.5 cm
Timepiece	20 Gs (2.0 mT)	4.0 cm
Phone / Smartphone	40 Gs (4.0 mT)	3.5 cm
Remote	50 Gs (5.0 mT)	3.0 cm
Payment card	400 Gs (40.0 mT)	1.5 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

Extremely neodym field poses a real danger to electronic devices and medical implants. These NdFeB products generate a flux that destroys function of sensitive medical devices. Be aware: the unseen radiation passes through tissues and housings. Increased vigilance must be taken by people with hearing aids and drug dispensers. Influence will be felt by: automatic timepieces, remotes, membranes, and screens. Do not bring the product near payment cards, hard drives, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - collision effects
MP 15x7/3.5x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	29.26 km/h (8.13 m/s)	0.21 J
30 mm	49.78 km/h (13.83 m/s)	0.60 J
50 mm	64.25 km/h (17.85 m/s)	1.00 J
100 mm	90.87 km/h (25.24 m/s)	2.00 J

NdFeB products are very brittle – a violent impact against metal risks their cracking. Watch the impact speed – a magnet released freely speeds with massive force. Kinetic force can cause material chips or dangerous crushing to skin. Hold the magnet firmly during bringing near metal so it doesn't hit violently against the metal. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Use safety goggles when working with large magnets.

Table 9: Corrosion resistance
MP 15x7/3.5x5 / 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)

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 (P_c)
MP 15x7/3.5x5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	4 791 Mx	47.9 µWb
P_c Coefficient	0.39	Low (Flat)

Total magnetic flux emitted by the magnet pole. Essential parameter in coil applications and motors. The P_c coefficient defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MP 15x7/3.5x5 / N38

Environment	Effective steel pull	Effect
Air (land)	5.09 kg	Standard
Water (riverbed)	5.83 kg (+0.74 kg buoyancy gain)	+14.5%

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

In water, the magnet feels stronger thanks to Archimedes' principle. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Wall mount (shear)

*Caution: On a vertical wall, the magnet holds just approx. 20-30% of its nominal pull.

2. Plate thickness effect

*Thin metal sheet (e.g. 0.5mm PC case) significantly weakens 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) = 0.39

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.

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%

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: 030390-2026

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The ring magnet with a hole MP 15x7/3.5x5 / 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 5.09 kg works great as a door latch, speaker holder, or mounting element in devices.

This is a crucial issue when working with model MP 15x7/3.5x5 / 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.

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 indoor 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. Aesthetic mounting requires selecting the appropriate head size.

It is a magnetic ring with a diameter of 15 mm and thickness 5 mm. The pulling force of this model is an impressive 5.09 kg, which translates to 49.95 N in newtons. The mounting hole diameter is precisely 7/3.5 mm.

The poles are located on the planes with holes, not on the sides of the ring. In the case of connecting two rings, make sure one is turned the right way. When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Pros as well as cons of rare earth magnets.

Strengths

Besides their exceptional strength, neodymium magnets offer the following advantages:

They retain full power for nearly ten years – the loss is just ~1% (according to analyses),
Neodymium magnets prove to be remarkably resistant to loss of magnetic properties caused by external interference,
In other words, due to the aesthetic surface of nickel, the element looks attractive,
Magnetic induction on the top side of the magnet remains maximum,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
Thanks to versatility in shaping and the ability to modify to unusual requirements,
Fundamental importance in future technologies – they find application in mass storage devices, brushless drives, diagnostic systems, and industrial machines.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Disadvantages of neodymium magnets:

They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also improves its resistance to damage
When exposed to high temperature, neodymium magnets suffer a drop in power. 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
When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
Limited possibility of producing nuts in the magnet and complicated shapes - preferred is casing - magnet mounting.
Potential hazard resulting from small fragments of magnets pose a threat, if swallowed, which becomes key in the aspect of protecting the youngest. Additionally, tiny parts of these devices are able to be problematic in diagnostics medical when they are in the body.
Due to neodymium price, their price is higher than average,

Lifting parameters

Magnetic strength at its maximum – what contributes to it?

The specified lifting capacity concerns the maximum value, obtained under optimal environment, specifically:

on a base made of mild steel, perfectly concentrating the magnetic field
possessing a thickness of minimum 10 mm to ensure full flux closure
with an ideally smooth contact surface
with total lack of distance (no coatings)
under vertical force vector (90-degree angle)
in stable room temperature

Magnet lifting force in use – key factors

Please note that the working load may be lower depending on the following factors, starting with the most relevant:

Distance – existence of foreign body (paint, dirt, air) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
Loading method – declared lifting capacity refers to pulling vertically. When slipping, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of generating force.
Chemical composition of the base – mild steel gives the best results. Alloy admixtures decrease magnetic properties and lifting capacity.
Smoothness – full contact is obtained only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
Heat – NdFeB sinters have a sensitivity to temperature. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).

Lifting capacity was assessed with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular detachment force, in contrast under parallel forces the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet and the plate decreases the holding force.

Safety rules for work with NdFeB magnets

Heat warning

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

Respect the power

Use magnets consciously. Their immense force can shock even professionals. Stay alert and respect their power.

Keep away from computers

Do not bring magnets near a purse, laptop, or TV. The magnetic field can irreversibly ruin these devices and wipe information from cards.

Protective goggles

Watch out for shards. Magnets can explode upon uncontrolled impact, launching shards into the air. We recommend safety glasses.

Swallowing risk

Strictly keep magnets out of reach of children. Ingestion danger is high, and the effects of magnets connecting inside the body are very dangerous.

Warning for heart patients

Individuals with a heart stimulator should maintain an large gap from magnets. The magnetic field can disrupt the operation of the life-saving device.

Physical harm

Mind your fingers. Two large magnets will snap together immediately with a force of massive weight, destroying anything in their path. Exercise extreme caution!

Fire warning

Powder created during grinding of magnets is self-igniting. Do not drill into magnets unless you are an expert.

Warning for allergy sufferers

Certain individuals suffer from a hypersensitivity to Ni, which is the standard coating for neodymium magnets. Extended handling might lead to dermatitis. We suggest wear safety gloves.

Keep away from electronics

Note: rare earth magnets generate a field that interferes with precision electronics. Keep a safe distance from your mobile, device, and GPS.

Warning! Want to know more? Read our article: Why are neodymium magnets dangerous?

MP 15x7/3.5x5 / N38 - ring magnet

Detailed specification - MP 15x7/3.5x5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical simulation of the magnet - data

Table 1: Static pull force (force vs distance) - interaction chart MP 15x7/3.5x5 / N38

Table 2: Shear capacity (wall) MP 15x7/3.5x5 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces MP 15x7/3.5x5 / N38

Table 4: Material efficiency (substrate influence) - power losses MP 15x7/3.5x5 / N38

Table 5: Thermal resistance (material behavior) - power drop MP 15x7/3.5x5 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system MP 15x7/3.5x5 / N38

Table 7: Protective zones (electronics) - precautionary measures MP 15x7/3.5x5 / N38

Table 8: Collisions (cracking risk) - collision effects MP 15x7/3.5x5 / N38

Table 9: Corrosion resistance MP 15x7/3.5x5 / N38

Table 10: Construction data (Pc) MP 15x7/3.5x5 / N38

Table 11: Hydrostatics and buoyancy MP 15x7/3.5x5 / N38

1. Wall mount (shear)

2. Plate thickness effect

3. Power loss vs temp

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

Material specification

Ecology and recycling (GPSR)

Force (pull)

Magnetic Induction

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MPL 5x5x1.2 / N38 - lamellar magnet

Pros as well as cons of rare earth magnets.

Strengths

Cons

Lifting parameters

Magnetic strength at its maximum – what contributes to it?

Magnet lifting force in use – key factors

Safety rules for work with NdFeB magnets

Heat warning

Respect the power

Keep away from computers

Protective goggles

Swallowing risk

Warning for heart patients

Physical harm

Fire warning

Warning for allergy sufferers

Keep away from electronics

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs distance) - interaction chart
MP 15x7/3.5x5 / N38

Table 2: Shear capacity (wall)
MP 15x7/3.5x5 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MP 15x7/3.5x5 / N38

Table 4: Material efficiency (substrate influence) - power losses
MP 15x7/3.5x5 / N38

Table 5: Thermal resistance (material behavior) - power drop
MP 15x7/3.5x5 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MP 15x7/3.5x5 / N38

Table 7: Protective zones (electronics) - precautionary measures
MP 15x7/3.5x5 / N38

Table 8: Collisions (cracking risk) - collision effects
MP 15x7/3.5x5 / N38

Table 9: Corrosion resistance
MP 15x7/3.5x5 / N38

Table 10: Construction data (P_c)
MP 15x7/3.5x5 / N38

Table 11: Hydrostatics and buoyancy
MP 15x7/3.5x5 / N38