Product available Ships tomorrow

MP 30x7/3x3 / N38 - ring magnet

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

ring magnet

Catalog no 030250

GTIN/EAN: 5906301812265

5.00

Diameter

30 mm [±0,1 mm]

internal diameter Ø

7/3 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

15.75 g

Magnetization Direction

↑ axial

Load capacity

3.64 kg / 35.69 N

Magnetic Induction

121.58 mT / 1216 Gs

Coating

[NiCuNi] Nickel

technical parameters »

6.84 ZŁ with VAT / pcs + price for transport

5.56 ZŁ net + 23% VAT / pcs

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Technical - MP 30x7/3x3 / N38 - ring magnet

Specification / characteristics - MP 30x7/3x3 / N38 - ring magnet

properties

properties	values
Cat. no.	030250
GTIN/EAN	5906301812265
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	30 mm [±0,1 mm]
internal diameter Ø	7/3 mm [±0,1 mm]
Height	3 mm [±0,1 mm]
Weight	15.75 g
Magnetization Direction	↑ axial
Load capacity ~ ?	3.64 kg / 35.69 N
Magnetic Induction ~ ?	121.58 mT / 1216 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 30x7/3x3 / 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 - technical parameters

Presented data represent the outcome of a mathematical analysis. Results were calculated on algorithms for the material Nd₂Fe₁₄B. Operational performance might slightly differ from theoretical values. Treat these data as a supplementary guide when designing systems.

Table 1: Static pull force (pull vs gap) - power drop
MP 30x7/3x3 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	1039 Gs 103.9 mT	3.64 kg / 8.02 pounds 3640.0 g / 35.7 N	warning
1 mm	1015 Gs 101.5 mT	3.48 kg / 7.67 pounds 3477.6 g / 34.1 N	warning
2 mm	980 Gs 98.0 mT	3.24 kg / 7.14 pounds 3240.7 g / 31.8 N	warning
3 mm	936 Gs 93.6 mT	2.95 kg / 6.51 pounds 2951.6 g / 29.0 N	warning
5 mm	827 Gs 82.7 mT	2.31 kg / 5.08 pounds 2305.8 g / 22.6 N	warning
10 mm	539 Gs 53.9 mT	0.98 kg / 2.16 pounds 981.0 g / 9.6 N	low risk
15 mm	329 Gs 32.9 mT	0.37 kg / 0.80 pounds 365.1 g / 3.6 N	low risk
20 mm	202 Gs 20.2 mT	0.14 kg / 0.30 pounds 137.9 g / 1.4 N	low risk
30 mm	85 Gs 8.5 mT	0.02 kg / 0.05 pounds 24.6 g / 0.2 N	low risk
50 mm	23 Gs 2.3 mT	0.00 kg / 0.00 pounds 1.8 g / 0.0 N	low risk

Grip strength weakens significantly with every mm of spacing. Remember that even the smallest gap (e.g., contamination, paint, dust) strongly diminishes the holding power. Magnetic products hold optimally at the point of direct contact; gap kills the force. Notice how rapidly the load capacity drop, when the product does not touch flatly to the metal substrate. When calculating the mounting, discard additional spacers.

Table 2: Vertical hold (wall)
MP 30x7/3x3 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.73 kg / 1.60 pounds 728.0 g / 7.1 N
1 mm	Stal (~0.2)	0.70 kg / 1.53 pounds 696.0 g / 6.8 N
2 mm	Stal (~0.2)	0.65 kg / 1.43 pounds 648.0 g / 6.4 N
3 mm	Stal (~0.2)	0.59 kg / 1.30 pounds 590.0 g / 5.8 N
5 mm	Stal (~0.2)	0.46 kg / 1.02 pounds 462.0 g / 4.5 N
10 mm	Stal (~0.2)	0.20 kg / 0.43 pounds 196.0 g / 1.9 N
15 mm	Stal (~0.2)	0.07 kg / 0.16 pounds 74.0 g / 0.7 N
20 mm	Stal (~0.2)	0.03 kg / 0.06 pounds 28.0 g / 0.3 N
30 mm	Stal (~0.2)	0.00 kg / 0.01 pounds 4.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

The table below calculates the approximate shear load necessary to start the downward movement of the magnet vertically on a upright steel plate (considering standard friction coefficient). The holding force is relative to the gap size between the magnet and the surface.

Table 3: Vertical assembly (shearing) - vertical pull
MP 30x7/3x3 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.09 kg / 2.41 pounds 1092.0 g / 10.7 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.73 kg / 1.60 pounds 728.0 g / 7.1 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.36 kg / 0.80 pounds 364.0 g / 3.6 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.82 kg / 4.01 pounds 1820.0 g / 17.9 N

When hanging a element on a vertical surface (e.g., a board), it will maintain just about 20%-30% of its nominal power. Gravity as well as a low friction coefficient cause that products slip easier than they detach. Want to create a hanger? Consider that the shear force is much weaker than the maximum static pull force. On a painted metal, the holder will slip down under a much lighter cargo. Utilizing a rubberized layer can drastically improve the result.

Table 4: Steel thickness (substrate influence) - power losses
MP 30x7/3x3 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.36 kg / 0.80 pounds 364.0 g / 3.6 N
1 mm	25%	0.91 kg / 2.01 pounds 910.0 g / 8.9 N
2 mm	50%	1.82 kg / 4.01 pounds 1820.0 g / 17.9 N
3 mm	75%	2.73 kg / 6.02 pounds 2730.0 g / 26.8 N
5 mm	100%	3.64 kg / 8.02 pounds 3640.0 g / 35.7 N
10 mm	100%	3.64 kg / 8.02 pounds 3640.0 g / 35.7 N
11 mm	100%	3.64 kg / 8.02 pounds 3640.0 g / 35.7 N
12 mm	100%	3.64 kg / 8.02 pounds 3640.0 g / 35.7 N

A too thin steel is incapable of conduct the full magnetic flux, which weakens actual performance of the holder. If you mount a strong magnet to a thin surface, the flux will penetrate right through and the pull force will drop sharply. To squeeze 100% of this magnet's power, you need a suitably thick element of metal. The material oversaturation causes that on thin elements (e.g., appliance housings), the holder shows lower pull force. We recommend selecting the steel cross-section according to the table below.

Table 5: Thermal stability (stability) - thermal limit
MP 30x7/3x3 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	3.64 kg / 8.02 pounds 3640.0 g / 35.7 N	OK
40 °C	-2.2%	3.56 kg / 7.85 pounds 3559.9 g / 34.9 N	OK
60 °C	-4.4%	3.48 kg / 7.67 pounds 3479.8 g / 34.1 N
80 °C	-6.6%	3.40 kg / 7.50 pounds 3399.8 g / 33.4 N
100 °C	-28.8%	2.59 kg / 5.71 pounds 2591.7 g / 25.4 N

Ordinary NdFeB products change their properties strength above the temperature limit. Avoid high temperatures – heat can permanently damage this product. With every degree above norm, the neodymium's power briefly decreases. Avoid using this magnet in hot environments exceeding its operating temperature limit. Ignoring the limit will lead to irreversible degradation of magnetism.

*Technical advisory: Temperature resistance depends not only on the material grade, but also on the magnet's shape. Thin magnets (low permeance coefficient) risk losing magnetic properties at lower temperatures than long magnets. The danger warning in the table signals a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - field range
MP 30x7/3x3 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	3.96 kg / 8.73 pounds 1 995 Gs	0.59 kg / 1.31 pounds 594 g / 5.8 N	N/A
1 mm	3.88 kg / 8.56 pounds 2 058 Gs	0.58 kg / 1.28 pounds 582 g / 5.7 N	3.49 kg / 7.70 pounds ~0 Gs
2 mm	3.78 kg / 8.34 pounds 2 031 Gs	0.57 kg / 1.25 pounds 567 g / 5.6 N	3.40 kg / 7.50 pounds ~0 Gs
3 mm	3.66 kg / 8.07 pounds 1 998 Gs	0.55 kg / 1.21 pounds 549 g / 5.4 N	3.30 kg / 7.26 pounds ~0 Gs
5 mm	3.37 kg / 7.43 pounds 1 918 Gs	0.51 kg / 1.12 pounds 506 g / 5.0 N	3.04 kg / 6.69 pounds ~0 Gs
10 mm	2.51 kg / 5.53 pounds 1 654 Gs	0.38 kg / 0.83 pounds 376 g / 3.7 N	2.26 kg / 4.97 pounds ~0 Gs
20 mm	1.07 kg / 2.35 pounds 1 079 Gs	0.16 kg / 0.35 pounds 160 g / 1.6 N	0.96 kg / 2.12 pounds ~0 Gs
50 mm	0.06 kg / 0.13 pounds 258 Gs	0.01 kg / 0.02 pounds 9 g / 0.1 N	0.05 kg / 0.12 pounds ~0 Gs
60 mm	0.03 kg / 0.06 pounds 171 Gs	0.00 kg / 0.01 pounds 4 g / 0.0 N	0.02 kg / 0.05 pounds ~0 Gs
70 mm	0.01 kg / 0.03 pounds 118 Gs	0.00 kg / 0.00 pounds 2 g / 0.0 N	0.01 kg / 0.03 pounds ~0 Gs
80 mm	0.01 kg / 0.01 pounds 84 Gs	0.00 kg / 0.00 pounds 1 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
90 mm	0.00 kg / 0.01 pounds 62 Gs	0.00 kg / 0.00 pounds 1 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
100 mm	0.00 kg / 0.00 pounds 47 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs

Two strong neodymiums attract each other from a wider radius than a neodymium and metal setup. Such a system of magnet-to-magnet creates a more powerful interaction and a further horizon of performance. Designing a powerful holder? Apply two magnets instead of a neodymium and a striker plate. Exercise caution that when connecting a pair of magnets, the pinch force is massive. The levitation is slightly lower than the attraction, but still large.
*Field value for N-N configuration is approximately ~0 Gs at the midpoint between the magnets (resulting from vector opposition).
Attention: Estimates show sliding force of two matching neodymium magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Hazards (electronics) - warnings
MP 30x7/3x3 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	9.0 cm
Hearing aid	10 Gs (1.0 mT)	7.0 cm
Mechanical watch	20 Gs (2.0 mT)	5.5 cm
Phone / Smartphone	40 Gs (4.0 mT)	4.5 cm
Remote	50 Gs (5.0 mT)	4.0 cm
Payment card	400 Gs (40.0 mT)	1.5 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

Powerful magnet radiation is a serious hazard to IT equipment and medical implants. These magnets produce a flux that disrupts operation of digital equipment. Remember: the unseen radiation acts through matter and glass. Exceptional care must be exercised by people with cochlear implants and drug dispensers. The risk also applies to: mechanical watches, car keys, speakers, and screens. Do not place the magnet near cards, HDD media, or sensitive navigation tools.

Table 8: Dynamics (kinetic energy) - warning
MP 30x7/3x3 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	17.73 km/h (4.92 m/s)	0.19 J
30 mm	26.67 km/h (7.41 m/s)	0.43 J
50 mm	34.29 km/h (9.53 m/s)	0.71 J
100 mm	48.48 km/h (13.47 m/s)	1.43 J

NdFeB products are prone to chipping – a collision with steel risks their cracking. Pay attention to connection velocity – a magnet released freely becomes dangerous. Striking energy can destroy the magnet or injury to skin. Hold the magnet firmly during mounting so it doesn't hit violently against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Use safety goggles when handling with powerful specimens.

Table 9: Coating parameters (durability)
MP 30x7/3x3 / 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: Electrical data (P_c)
MP 30x7/3x3 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	8 395 Mx	84.0 µWb
P_c Coefficient	0.13	Low (Flat)

Flux value emitted by the magnet pole. Essential parameter in coil applications and motors. P_c value defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MP 30x7/3x3 / N38

Environment	Effective steel pull	Effect
Air (land)	3.64 kg	Standard
Water (riverbed)	4.17 kg (+0.53 kg buoyancy gain)	+14.5%

Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

Contrary to myths, water does not block the magnetic field. However, remember the water resistance when pulling the rope quickly.

1. Sliding resistance

*Note: On a vertical wall, the magnet holds only ~20% of its max power.

2. Efficiency vs thickness

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

3. Power loss vs temp

*For standard magnets, the safety limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.13

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%

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: 030250-2026

Measurement Calculator

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Force (N)

Pounds (lbs)

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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. It is also often used in advertising for fixing signs and in workshops for organizing tools.

This material behaves more like porcelain than steel, so it doesn't forgive mistakes during mounting. When tightening the screw, you must maintain caution. 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 easily scratched when tightening the screw, which will become a corrosion focus. If you must use it outside, paint it with anti-corrosion paint after mounting.

A screw or bolt with a thread diameter smaller than 7/3 mm fits this model. 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. Aesthetic mounting requires selecting the appropriate head size.

This model is characterized by dimensions Ø30x3 mm and a weight of 15.75 g. The pulling force of this model is an impressive 3.64 kg, which translates to 35.69 N in newtons. The mounting hole diameter is precisely 7/3 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. 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.

Strengths

In addition to their pulling strength, neodymium magnets provide the following advantages:

They have constant strength, and over more than 10 years their performance decreases symbolically – ~1% (in testing),
They retain their magnetic properties even under strong external field,
By using a lustrous layer of gold, the element presents an modern look,
The surface of neodymium magnets generates a unique magnetic field – this is a distinguishing feature,
Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
Thanks to flexibility in shaping and the ability to adapt to specific needs,
Universal use in future technologies – they serve a role in HDD drives, drive modules, precision medical tools, and multitasking production systems.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Disadvantages of NdFeB magnets:

Brittleness is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a steel housing, which not only secures them against impacts but also raises their durability
When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength 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
Magnets exposed to a humid environment can rust. Therefore during using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
We suggest cover - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complicated shapes.
Health risk resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child safety. It is also worth noting that small elements of these magnets are able to disrupt the diagnostic process medical in case of swallowing.
With large orders the cost of neodymium magnets is a challenge,

Lifting parameters

Maximum lifting capacity of the magnet – what it depends on?

Magnet power was defined for the most favorable conditions, taking into account:

on a plate made of mild steel, optimally conducting the magnetic field
possessing a thickness of minimum 10 mm to avoid saturation
with a plane perfectly flat
without any air gap between the magnet and steel
during detachment in a direction perpendicular to the plane
at conditions approx. 20°C

Lifting capacity in practice – influencing factors

Real force is affected by specific conditions, including (from most important):

Space between surfaces – every millimeter of distance (caused e.g. by veneer or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
Loading method – catalog parameter refers to detachment vertically. When attempting to slide, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet restricts the attraction force (the magnet "punches through" it).
Chemical composition of the base – low-carbon steel attracts best. Alloy admixtures reduce magnetic permeability and holding force.
Plate texture – smooth surfaces ensure maximum contact, which improves field saturation. Uneven metal reduce efficiency.
Temperature influence – hot environment reduces pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was assessed with the use of a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, however under shearing force the lifting capacity is smaller. In addition, even a slight gap between the magnet and the plate decreases the load capacity.

H&S for magnets

Avoid contact if allergic

Medical facts indicate that the nickel plating (standard magnet coating) is a strong allergen. If your skin reacts to metals, prevent direct skin contact or opt for coated magnets.

Maximum temperature

Do not overheat. NdFeB magnets are susceptible to temperature. If you need resistance above 80°C, ask us about special high-temperature series (H, SH, UH).

Life threat

Individuals with a heart stimulator must maintain an safe separation from magnets. The magnetism can disrupt the functioning of the implant.

Precision electronics

GPS units and mobile phones are highly sensitive to magnetism. Direct contact with a strong magnet can ruin the internal compass in your phone.

Keep away from computers

Data protection: Strong magnets can damage data carriers and delicate electronics (heart implants, hearing aids, mechanical watches).

No play value

Adult use only. Small elements pose a choking risk, causing serious injuries. Store out of reach of kids and pets.

Shattering risk

Beware of splinters. Magnets can explode upon violent connection, launching sharp fragments into the air. Wear goggles.

Finger safety

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

Powerful field

Handle magnets consciously. Their powerful strength can shock even professionals. Stay alert and do not underestimate their power.

Do not drill into magnets

Fire warning: Rare earth powder is explosive. Do not process magnets without safety gear as this may cause fire.

Safety First! Details about risks in the article: Magnet Safety Guide.

MP 30x7/3x3 / N38 - ring magnet

Technical - MP 30x7/3x3 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical simulation of the magnet - technical parameters

Table 1: Static pull force (pull vs gap) - power drop MP 30x7/3x3 / N38

Table 2: Vertical hold (wall) MP 30x7/3x3 / N38

Table 3: Vertical assembly (shearing) - vertical pull MP 30x7/3x3 / N38

Table 4: Steel thickness (substrate influence) - power losses MP 30x7/3x3 / N38

Table 5: Thermal stability (stability) - thermal limit MP 30x7/3x3 / N38

Table 6: Two magnets (attraction) - field range MP 30x7/3x3 / N38

Table 7: Hazards (electronics) - warnings MP 30x7/3x3 / N38

Table 8: Dynamics (kinetic energy) - warning MP 30x7/3x3 / N38

Table 9: Coating parameters (durability) MP 30x7/3x3 / N38

Table 10: Electrical data (Pc) MP 30x7/3x3 / N38

Table 11: Hydrostatics and buoyancy MP 30x7/3x3 / N38

1. Sliding resistance

2. Efficiency vs thickness

3. Power loss vs temp

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

Elemental analysis

Environmental data

Force (pull)

Magnetic Field

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MPL 50x25x12 / N38 - lamellar magnet

Advantages as well as disadvantages of Nd2Fe14B magnets.

Strengths

Cons

Lifting parameters

Maximum lifting capacity of the magnet – what it depends on?

Lifting capacity in practice – influencing factors

H&S for magnets

Avoid contact if allergic

Maximum temperature

Life threat

Precision electronics

Keep away from computers

No play value

Shattering risk

Finger safety

Powerful field

Do not drill into magnets

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs gap) - power drop
MP 30x7/3x3 / N38

Table 2: Vertical hold (wall)
MP 30x7/3x3 / N38

Table 3: Vertical assembly (shearing) - vertical pull
MP 30x7/3x3 / N38

Table 4: Steel thickness (substrate influence) - power losses
MP 30x7/3x3 / N38

Table 5: Thermal stability (stability) - thermal limit
MP 30x7/3x3 / N38

Table 6: Two magnets (attraction) - field range
MP 30x7/3x3 / N38

Table 7: Hazards (electronics) - warnings
MP 30x7/3x3 / N38

Table 8: Dynamics (kinetic energy) - warning
MP 30x7/3x3 / N38

Table 9: Coating parameters (durability)
MP 30x7/3x3 / N38

Table 10: Electrical data (P_c)
MP 30x7/3x3 / N38

Table 11: Hydrostatics and buoyancy
MP 30x7/3x3 / N38

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.