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MP 40x22x10 / 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 030344

GTIN/EAN: 5906301812296

5.00

Diameter

40 mm [±0,1 mm]

internal diameter Ø

22 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

65.74 g

Magnetization Direction

↑ axial

Load capacity

19.34 kg / 189.71 N

Magnetic Induction

277.22 mT / 2772 Gs

Coating

[NiCuNi] Nickel

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40.59 ZŁ with VAT / pcs + price for transport

33.00 ZŁ net + 23% VAT / pcs

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Technical of the product - MP 40x22x10 / N38 - ring magnet

Specification / characteristics - MP 40x22x10 / N38 - ring magnet

properties

properties	values
Cat. no.	030344
GTIN/EAN	5906301812296
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	22 mm [±0,1 mm]
Height	10 mm [±0,1 mm]
Weight	65.74 g
Magnetization Direction	↑ axial
Load capacity ~ ?	19.34 kg / 189.71 N
Magnetic Induction ~ ?	277.22 mT / 2772 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 40x22x10 / 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 simulation of the assembly - data

These information are the direct effect of a mathematical calculation. Values rely on models for the material Nd₂Fe₁₄B. Actual performance may deviate from the simulation results. Use these data as a preliminary roadmap when designing systems.

Table 1: Static pull force (force vs gap) - interaction chart
MP 40x22x10 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5269 Gs 526.9 mT	19.34 kg / 42.64 lbs 19340.0 g / 189.7 N	dangerous!
1 mm	5005 Gs 500.5 mT	17.46 kg / 38.48 lbs 17455.9 g / 171.2 N	dangerous!
2 mm	4739 Gs 473.9 mT	15.65 kg / 34.50 lbs 15647.5 g / 153.5 N	dangerous!
3 mm	4475 Gs 447.5 mT	13.95 kg / 30.75 lbs 13950.0 g / 136.8 N	dangerous!
5 mm	3960 Gs 396.0 mT	10.93 kg / 24.09 lbs 10927.7 g / 107.2 N	dangerous!
10 mm	2832 Gs 283.2 mT	5.59 kg / 12.32 lbs 5589.2 g / 54.8 N	medium risk
15 mm	1990 Gs 199.0 mT	2.76 kg / 6.09 lbs 2760.5 g / 27.1 N	medium risk
20 mm	1407 Gs 140.7 mT	1.38 kg / 3.04 lbs 1379.2 g / 13.5 N	weak grip
30 mm	745 Gs 74.5 mT	0.39 kg / 0.85 lbs 386.2 g / 3.8 N	weak grip
50 mm	268 Gs 26.8 mT	0.05 kg / 0.11 lbs 50.1 g / 0.5 N	weak grip

Pulling power weakens drastically with every mm of gap. Note that every additional insulation layer (e.g., dirt, varnish, dust) noticeably diminishes the holding power. Magnets operate most effectively in perfect adhesion; distance kills the power. Analyze how quickly the pull force drop, when the magnet does not adhere directly to the metal substrate. When calculating the assembly, discard redundant distances.

Table 2: Sliding load (wall)
MP 40x22x10 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	3.87 kg / 8.53 lbs 3868.0 g / 37.9 N
1 mm	Stal (~0.2)	3.49 kg / 7.70 lbs 3492.0 g / 34.3 N
2 mm	Stal (~0.2)	3.13 kg / 6.90 lbs 3130.0 g / 30.7 N
3 mm	Stal (~0.2)	2.79 kg / 6.15 lbs 2790.0 g / 27.4 N
5 mm	Stal (~0.2)	2.19 kg / 4.82 lbs 2186.0 g / 21.4 N
10 mm	Stal (~0.2)	1.12 kg / 2.46 lbs 1118.0 g / 11.0 N
15 mm	Stal (~0.2)	0.55 kg / 1.22 lbs 552.0 g / 5.4 N
20 mm	Stal (~0.2)	0.28 kg / 0.61 lbs 276.0 g / 2.7 N
30 mm	Stal (~0.2)	0.08 kg / 0.17 lbs 78.0 g / 0.8 N
50 mm	Stal (~0.2)	0.01 kg / 0.02 lbs 10.0 g / 0.1 N

The table below shows the approximate force necessary to start the downward movement of the magnet downwards against a vertical steel wall (considering typical friction). This parameter is relative to the separation distance between the magnet and the metal.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MP 40x22x10 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	5.80 kg / 12.79 lbs 5802.0 g / 56.9 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	3.87 kg / 8.53 lbs 3868.0 g / 37.9 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	1.93 kg / 4.26 lbs 1934.0 g / 19.0 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	9.67 kg / 21.32 lbs 9670.0 g / 94.9 N

When placing a holder on a upright wall (e.g., a board), it you can count on just about 1/5 of its maximum pull force. Gravitational force and a weak degree of grip influence the fact that products move down faster than they pop off the substrate. Designing a hanger? Note that the sliding force is significantly lower than the maximum static pull force. On a painted metal, the magnet will slide down under a noticeably lighter cargo. Utilizing a rubberized coating can effectively improve the result.

Table 4: Material efficiency (saturation) - power losses
MP 40x22x10 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	5%	0.97 kg / 2.13 lbs 967.0 g / 9.5 N
1 mm	13%	2.42 kg / 5.33 lbs 2417.5 g / 23.7 N
2 mm	25%	4.84 kg / 10.66 lbs 4835.0 g / 47.4 N
3 mm	38%	7.25 kg / 15.99 lbs 7252.5 g / 71.1 N
5 mm	63%	12.09 kg / 26.65 lbs 12087.5 g / 118.6 N
10 mm	100%	19.34 kg / 42.64 lbs 19340.0 g / 189.7 N
11 mm	100%	19.34 kg / 42.64 lbs 19340.0 g / 189.7 N
12 mm	100%	19.34 kg / 42.64 lbs 19340.0 g / 189.7 N

A thin sheet is incapable of focus the entire magnetic field, which squanders power of the holder. If you attach a powerful product to a too thin substrate, the field will penetrate right through and the holding will be smaller. To squeeze full efficiency of this magnet's power, you require a sufficiently solid backing of metal. The material oversaturation means that on delicate walls (e.g., car bodies), the product shows lower pull force. We advise picking the steel dimension from these parameters.

Table 5: Working in heat (material behavior) - thermal limit
MP 40x22x10 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	19.34 kg / 42.64 lbs 19340.0 g / 189.7 N	OK
40 °C	-2.2%	18.91 kg / 41.70 lbs 18914.5 g / 185.6 N	OK
60 °C	-4.4%	18.49 kg / 40.76 lbs 18489.0 g / 181.4 N	OK
80 °C	-6.6%	18.06 kg / 39.82 lbs 18063.6 g / 177.2 N
100 °C	-28.8%	13.77 kg / 30.36 lbs 13770.1 g / 135.1 N

Classic neodymiums irreversibly lose strength after exceeding the maximum temperature. Protect against heat – excessive heat can irreversibly destroy this product. With increasing heat, the neodymium's power temporarily lowers. Refrain from using this product close to heaters exceeding its safe range. Exceeding the critical threshold will cause destruction of magnetic properties.

*Important note: Temperature resistance depends not only on the material grade, as well as the dimension ratios. Low-profile magnets (pancake types) risk losing magnetic properties sooner compared to rod magnets. The danger warning in the table signals permanent field degradation for this particular item.

Table 6: Two magnets (repulsion) - field collision
MP 40x22x10 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	171.37 kg / 377.80 lbs 5 920 Gs	25.71 kg / 56.67 lbs 25705 g / 252.2 N	N/A
1 mm	163.01 kg / 359.38 lbs 10 277 Gs	24.45 kg / 53.91 lbs 24452 g / 239.9 N	146.71 kg / 323.44 lbs ~0 Gs
2 mm	154.67 kg / 341.00 lbs 10 011 Gs	23.20 kg / 51.15 lbs 23201 g / 227.6 N	139.21 kg / 306.90 lbs ~0 Gs
3 mm	146.55 kg / 323.08 lbs 9 744 Gs	21.98 kg / 48.46 lbs 21982 g / 215.6 N	131.89 kg / 290.77 lbs ~0 Gs
5 mm	131.00 kg / 288.81 lbs 9 213 Gs	19.65 kg / 43.32 lbs 19650 g / 192.8 N	117.90 kg / 259.92 lbs ~0 Gs
10 mm	96.83 kg / 213.47 lbs 7 921 Gs	14.52 kg / 32.02 lbs 14524 g / 142.5 N	87.15 kg / 192.12 lbs ~0 Gs
20 mm	49.53 kg / 109.18 lbs 5 665 Gs	7.43 kg / 16.38 lbs 7429 g / 72.9 N	44.57 kg / 98.27 lbs ~0 Gs
50 mm	6.33 kg / 13.95 lbs 2 025 Gs	0.95 kg / 2.09 lbs 949 g / 9.3 N	5.69 kg / 12.55 lbs ~0 Gs
60 mm	3.42 kg / 7.55 lbs 1 489 Gs	0.51 kg / 1.13 lbs 513 g / 5.0 N	3.08 kg / 6.79 lbs ~0 Gs
70 mm	1.94 kg / 4.27 lbs 1 120 Gs	0.29 kg / 0.64 lbs 290 g / 2.8 N	1.74 kg / 3.84 lbs ~0 Gs
80 mm	1.14 kg / 2.52 lbs 860 Gs	0.17 kg / 0.38 lbs 171 g / 1.7 N	1.03 kg / 2.27 lbs ~0 Gs
90 mm	0.70 kg / 1.54 lbs 673 Gs	0.10 kg / 0.23 lbs 105 g / 1.0 N	0.63 kg / 1.39 lbs ~0 Gs
100 mm	0.44 kg / 0.98 lbs 536 Gs	0.07 kg / 0.15 lbs 67 g / 0.7 N	0.40 kg / 0.88 lbs ~0 Gs

Two strong neodymiums attract each other from a wider radius than a magnet and steel combination. The connection of two magnets produces a massive flux and a wider radius of performance. Planning to create a strong closure? Use a pair of magnets instead of one magnet and a striker plate. Be careful that when connecting a pair of magnets, the impact force is massive. The repulsion force is marginally weaker than the connection force, but still large.
*The magnetic induction between like poles reaches ~0 Gs in the exact middle between the magnets (caused by magnetic field nullification).
Attention: Results refer to shear force of a pair of same neodymium magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Protective zones (electronics) - precautionary measures
MP 40x22x10 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	24.0 cm
Hearing aid	10 Gs (1.0 mT)	18.5 cm
Mechanical watch	20 Gs (2.0 mT)	14.5 cm
Mobile device	40 Gs (4.0 mT)	11.0 cm
Car key	50 Gs (5.0 mT)	10.5 cm
Payment card	400 Gs (40.0 mT)	4.5 cm
HDD hard drive	600 Gs (60.0 mT)	3.5 cm

A strong magnetic field is a large risk to electronic devices and medical implants. These magnets generate a flux that prevents correct functioning of sensitive medical devices. Remember: the unseen radiation penetrates the body and glass. Special caution must be exercised by people with hearing aids and drug dispensers. Influence will be felt by: automatic timepieces, remotes, speakers, and displays. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (cracking risk) - warning
MP 40x22x10 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	20.18 km/h (5.61 m/s)	1.03 J
30 mm	30.33 km/h (8.43 m/s)	2.33 J
50 mm	38.74 km/h (10.76 m/s)	3.81 J
100 mm	54.70 km/h (15.20 m/s)	7.59 J

NdFeB products are delicate – a strong collision with metal can result in shattering. Pay attention to connection velocity – a magnet released freely speeds with massive force. Striking energy can cause material chips or dangerous crushing to skin. Hold the magnet firmly during bringing near metal so it doesn't slam with momentum against the steel surface. A collision at high speed ends with a crack of the neodymium. Wear safety glasses when working with large magnets.

Table 9: Anti-corrosion coating durability
MP 40x22x10 / 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 following table defines the conditions under which this product can be safely used. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Electrical data (P_c)
MP 40x22x10 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	54 070 Mx	540.7 µWb
P_c Coefficient	0.81	High (Stable)

Flux value emitted by the pole surface. Key data when building generators as well as sensors. P_c value defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MP 40x22x10 / N38

Environment	Effective steel pull	Effect
Air (land)	19.34 kg	Standard
Water (riverbed)	22.14 kg (+2.80 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!

Water displaces steel, making heavy objects slightly lighter. However, remember the water resistance when pulling the rope quickly.

1. Shear force

*Note: On a vertical wall, the magnet retains merely a fraction of its max power.

2. Efficiency vs thickness

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

3. Power loss vs temp

*For N38 grade, the critical limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.81

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

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%

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: 030344-2026

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The ring magnet with a hole MP 40x22x10 / N38 is created for permanent mounting, where glue might fail or be insufficient. Thanks to the hole (often for a screw), this model enables quick installation to wood, wall, plastic, or metal. This product with a force of 19.34 kg works great as a door latch, speaker holder, or spacer element in devices.

This is a crucial issue when working with model MP 40x22x10 / N38. Neodymium magnets are sintered ceramics, which means they are hard but breakable and inelastic. 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. It's a good idea to use a flexible washer under the screw head, which will cushion the stresses. 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 rubberized holders 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 40 mm and thickness 10 mm. The key parameter here is the holding force amounting to approximately 19.34 kg (force ~189.71 N). The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 22 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 as well as weaknesses of Nd₂Fe₁₄B magnets.

Advantages

Apart from their superior power, neodymium magnets have these key benefits:

They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
Magnets very well defend themselves against demagnetization caused by ambient magnetic noise,
The use of an shiny finish of noble metals (nickel, gold, silver) causes the element to present itself better,
The surface of neodymium magnets generates a powerful magnetic field – this is a key feature,
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 the option of flexible shaping and customization to individualized needs, neodymium magnets can be created in a broad palette of geometric configurations, which expands the range of possible applications,
Fundamental importance in innovative solutions – they are utilized in mass storage devices, electric motors, medical devices, as well as modern systems.
Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Weaknesses

Disadvantages of neodymium magnets:

To avoid cracks under impact, we suggest using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
Limited ability of making nuts in the magnet and complex shapes - recommended is a housing - magnetic holder.
Possible danger related to microscopic parts of magnets pose a threat, if swallowed, which is particularly important in the aspect of protecting the youngest. Furthermore, tiny parts of these products are able to be problematic in diagnostics medical when they are in the body.
Due to complex production process, their price is relatively high,

Holding force characteristics

Maximum magnetic pulling force – what contributes to it?

The load parameter shown concerns the maximum value, recorded under optimal environment, specifically:

with the use of a yoke made of special test steel, guaranteeing maximum field concentration
possessing a massiveness of minimum 10 mm to ensure full flux closure
with a plane cleaned and smooth
without the slightest clearance between the magnet and steel
under vertical application of breakaway force (90-degree angle)
in neutral thermal conditions

Practical lifting capacity: influencing factors

Effective lifting capacity impacted by specific conditions, such as (from most important):

Air gap (between the magnet and the metal), since even a very small distance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the maximum value.
Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of generating force.
Plate material – low-carbon steel attracts best. Alloy admixtures lower magnetic permeability and lifting capacity.
Plate texture – ground elements guarantee perfect abutment, which increases force. Rough surfaces weaken the grip.
Operating temperature – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under perpendicular forces, however under attempts to slide the magnet the holding force is lower. In addition, even a minimal clearance between the magnet and the plate decreases the load capacity.

Safety rules for work with neodymium magnets

Serious injuries

Watch your fingers. Two powerful magnets will join immediately with a force of several hundred kilograms, destroying anything in their path. Be careful!

Power loss in heat

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

Medical interference

Individuals with a heart stimulator have to keep an absolute distance from magnets. The magnetic field can interfere with the operation of the life-saving device.

Adults only

NdFeB magnets are not intended for children. Accidental ingestion of a few magnets can lead to them attracting across intestines, which poses a severe health hazard and requires urgent medical intervention.

Material brittleness

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

Nickel allergy

It is widely known that nickel (the usual finish) is a strong allergen. If you have an allergy, refrain from touching magnets with bare hands or select versions in plastic housing.

Fire warning

Fire hazard: Rare earth powder is highly flammable. Avoid machining magnets in home conditions as this risks ignition.

Caution required

Before use, read the rules. Sudden snapping can break the magnet or injure your hand. Be predictive.

Keep away from computers

Avoid bringing magnets close to a purse, laptop, or TV. The magnetic field can destroy these devices and erase data from cards.

Compass and GPS

An intense magnetic field negatively affects the functioning of compasses in smartphones and navigation systems. Maintain magnets close to a smartphone to prevent damaging the sensors.

Danger! Learn more about risks in the article: Magnet Safety Guide.

MP 40x22x10 / N38 - ring magnet

Technical of the product - MP 40x22x10 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering simulation of the assembly - data

Table 1: Static pull force (force vs gap) - interaction chart MP 40x22x10 / N38

Table 2: Sliding load (wall) MP 40x22x10 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces MP 40x22x10 / N38

Table 4: Material efficiency (saturation) - power losses MP 40x22x10 / N38

Table 5: Working in heat (material behavior) - thermal limit MP 40x22x10 / N38

Table 6: Two magnets (repulsion) - field collision MP 40x22x10 / N38

Table 7: Protective zones (electronics) - precautionary measures MP 40x22x10 / N38

Table 8: Dynamics (cracking risk) - warning MP 40x22x10 / N38

Table 9: Anti-corrosion coating durability MP 40x22x10 / N38

Table 10: Electrical data (Pc) MP 40x22x10 / N38

Table 11: Underwater work (magnet fishing) MP 40x22x10 / N38

1. Shear force

2. Efficiency vs thickness

3. Power loss vs temp

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

Material specification

Sustainability

Magnet pull force

Magnetic Field

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Strengths as well as weaknesses of Nd2Fe14B magnets.

Advantages

Weaknesses

Holding force characteristics

Maximum magnetic pulling force – what contributes to it?

Practical lifting capacity: influencing factors

Safety rules for work with neodymium magnets

Serious injuries

Power loss in heat

Medical interference

Adults only

Material brittleness

Nickel allergy

Fire warning

Caution required

Keep away from computers

Compass and GPS

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs gap) - interaction chart
MP 40x22x10 / N38

Table 2: Sliding load (wall)
MP 40x22x10 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MP 40x22x10 / N38

Table 4: Material efficiency (saturation) - power losses
MP 40x22x10 / N38

Table 5: Working in heat (material behavior) - thermal limit
MP 40x22x10 / N38

Table 6: Two magnets (repulsion) - field collision
MP 40x22x10 / N38

Table 7: Protective zones (electronics) - precautionary measures
MP 40x22x10 / N38

Table 8: Dynamics (cracking risk) - warning
MP 40x22x10 / N38

Table 9: Anti-corrosion coating durability
MP 40x22x10 / N38

Table 10: Electrical data (P_c)
MP 40x22x10 / N38

Table 11: Underwater work (magnet fishing)
MP 40x22x10 / N38

Strengths as well as weaknesses of Nd₂Fe₁₄B magnets.