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MP 20x8/4x3 / 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 030187

GTIN/EAN: 5906301812043

5.00

Diameter

20 mm [±0,1 mm]

internal diameter Ø

8/4 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

6.79 g

Magnetization Direction

↑ axial

Load capacity

3.14 kg / 30.79 N

Magnetic Induction

178.11 mT / 1781 Gs

Coating

[NiCuNi] Nickel

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3.59 ZŁ with VAT / pcs + price for transport

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Product card - MP 20x8/4x3 / N38 - ring magnet

Specification / characteristics - MP 20x8/4x3 / N38 - ring magnet

properties

properties	values
Cat. no.	030187
GTIN/EAN	5906301812043
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	20 mm [±0,1 mm]
internal diameter Ø	8/4 mm [±0,1 mm]
Height	3 mm [±0,1 mm]
Weight	6.79 g
Magnetization Direction	↑ axial
Load capacity ~ ?	3.14 kg / 30.79 N
Magnetic Induction ~ ?	178.11 mT / 1781 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 20x8/4x3 / 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

The following values are the direct effect of a physical analysis. Results rely on models for the material Nd₂Fe₁₄B. Operational performance may differ. Treat these data as a reference point when designing systems.

Table 1: Static pull force (pull vs distance) - power drop
MP 20x8/4x3 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	1531 Gs 153.1 mT	3.14 kg / 6.92 lbs 3140.0 g / 30.8 N	warning
1 mm	1457 Gs 145.7 mT	2.84 kg / 6.27 lbs 2843.2 g / 27.9 N	warning
2 mm	1352 Gs 135.2 mT	2.45 kg / 5.39 lbs 2446.6 g / 24.0 N	warning
3 mm	1227 Gs 122.7 mT	2.02 kg / 4.44 lbs 2016.2 g / 19.8 N	warning
5 mm	963 Gs 96.3 mT	1.24 kg / 2.74 lbs 1241.9 g / 12.2 N	safe
10 mm	465 Gs 46.5 mT	0.29 kg / 0.64 lbs 289.3 g / 2.8 N	safe
15 mm	228 Gs 22.8 mT	0.07 kg / 0.15 lbs 69.7 g / 0.7 N	safe
20 mm	122 Gs 12.2 mT	0.02 kg / 0.04 lbs 20.0 g / 0.2 N	safe
30 mm	45 Gs 4.5 mT	0.00 kg / 0.01 lbs 2.7 g / 0.0 N	safe
50 mm	11 Gs 1.1 mT	0.00 kg / 0.00 lbs 0.2 g / 0.0 N	safe

Grip strength drops sharply per each millimeter of distance. Remember that every additional insulation layer (e.g., contamination, varnish, rust) noticeably reduces the pull force. Magnets work strongest at the point of direct contact; air break nullifies the force. Notice how rapidly the pull force plummet, when the product does not adhere flatly to the steel surface. When calculating the assembly, eliminate additional spacers.

Table 2: Sliding capacity (vertical surface)
MP 20x8/4x3 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.63 kg / 1.38 lbs 628.0 g / 6.2 N
1 mm	Stal (~0.2)	0.57 kg / 1.25 lbs 568.0 g / 5.6 N
2 mm	Stal (~0.2)	0.49 kg / 1.08 lbs 490.0 g / 4.8 N
3 mm	Stal (~0.2)	0.40 kg / 0.89 lbs 404.0 g / 4.0 N
5 mm	Stal (~0.2)	0.25 kg / 0.55 lbs 248.0 g / 2.4 N
10 mm	Stal (~0.2)	0.06 kg / 0.13 lbs 58.0 g / 0.6 N
15 mm	Stal (~0.2)	0.01 kg / 0.03 lbs 14.0 g / 0.1 N
20 mm	Stal (~0.2)	0.00 kg / 0.01 lbs 4.0 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

The table below indicates the approximate holding capacity needed to initiate the downward movement of the magnet downwards against a upright steel wall (assuming standard friction coefficient). This value is a function of the separation distance between the magnet and the surface.

Table 3: Vertical assembly (shearing) - vertical pull
MP 20x8/4x3 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.94 kg / 2.08 lbs 942.0 g / 9.2 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.63 kg / 1.38 lbs 628.0 g / 6.2 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.31 kg / 0.69 lbs 314.0 g / 3.1 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.57 kg / 3.46 lbs 1570.0 g / 15.4 N

When mounting a holder on a upright wall (e.g., a board), it will only hold only approx. 1/5 of its maximum pull force. Gravitational force as well as a weak degree of grip cause that magnets slide down faster than they pop off the substrate. Want to create a wall mount? Consider that the shear force is significantly lower than the maximum static pull force. On a slippery surface, the element will slip down under a significantly smaller weight. Utilizing a rubberized pad can effectively improve the result.

Table 4: Steel thickness (substrate influence) - power losses
MP 20x8/4x3 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.31 kg / 0.69 lbs 314.0 g / 3.1 N
1 mm	25%	0.79 kg / 1.73 lbs 785.0 g / 7.7 N
2 mm	50%	1.57 kg / 3.46 lbs 1570.0 g / 15.4 N
3 mm	75%	2.36 kg / 5.19 lbs 2355.0 g / 23.1 N
5 mm	100%	3.14 kg / 6.92 lbs 3140.0 g / 30.8 N
10 mm	100%	3.14 kg / 6.92 lbs 3140.0 g / 30.8 N
11 mm	100%	3.14 kg / 6.92 lbs 3140.0 g / 30.8 N
12 mm	100%	3.14 kg / 6.92 lbs 3140.0 g / 30.8 N

A too thin steel cannot focus the entire magnetic field, which weakens actual performance of the holder. If you attach a powerful product to a thin surface, the flux will penetrate right through and the attraction force will be weaker. To squeeze 100% of this neodymium's potential, you need a suitably thick backing of steel. The saturation effect causes that on delicate walls (e.g., car bodies), the magnet shows lower pull force. We advise picking the steel dimension based on the following data.

Table 5: Thermal resistance (stability) - resistance threshold
MP 20x8/4x3 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	3.14 kg / 6.92 lbs 3140.0 g / 30.8 N	OK
40 °C	-2.2%	3.07 kg / 6.77 lbs 3070.9 g / 30.1 N	OK
60 °C	-4.4%	3.00 kg / 6.62 lbs 3001.8 g / 29.4 N
80 °C	-6.6%	2.93 kg / 6.47 lbs 2932.8 g / 28.8 N
100 °C	-28.8%	2.24 kg / 4.93 lbs 2235.7 g / 21.9 N

Standard neodymium magnets irreversibly lose power past the thermal threshold. Avoid high temperatures – excessive heat can permanently demagnetize this product. With every degree above norm, the magnet's capacity briefly lowers. Refrain from using this product close to heaters exceeding its safe range. Too high temperature will cause irreversible degradation of magnetism.

*Engineering note: Heat tolerance is determined by both grade, but also on the magnet's shape. Low-profile magnets (low permeance coefficient) risk losing magnetic properties at lower temperatures compared to rod magnets. The danger warning in the table indicates permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - field range
MP 20x8/4x3 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Strength (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	3.71 kg / 8.17 lbs 2 815 Gs	0.56 kg / 1.23 lbs 556 g / 5.5 N	N/A
1 mm	3.55 kg / 7.83 lbs 2 998 Gs	0.53 kg / 1.17 lbs 533 g / 5.2 N	3.20 kg / 7.05 lbs ~0 Gs
2 mm	3.36 kg / 7.40 lbs 2 915 Gs	0.50 kg / 1.11 lbs 503 g / 4.9 N	3.02 kg / 6.66 lbs ~0 Gs
3 mm	3.13 kg / 6.90 lbs 2 815 Gs	0.47 kg / 1.04 lbs 470 g / 4.6 N	2.82 kg / 6.21 lbs ~0 Gs
5 mm	2.63 kg / 5.81 lbs 2 582 Gs	0.40 kg / 0.87 lbs 395 g / 3.9 N	2.37 kg / 5.23 lbs ~0 Gs
10 mm	1.47 kg / 3.23 lbs 1 926 Gs	0.22 kg / 0.48 lbs 220 g / 2.2 N	1.32 kg / 2.91 lbs ~0 Gs
20 mm	0.34 kg / 0.75 lbs 930 Gs	0.05 kg / 0.11 lbs 51 g / 0.5 N	0.31 kg / 0.68 lbs ~0 Gs
50 mm	0.01 kg / 0.02 lbs 143 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 / 0.01 lbs 90 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 59 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 41 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 30 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 22 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs

Two strong neodymiums attract each other from a significantly greater distance than a neodymium and metal combination. The setup of magnet-to-magnet creates a more powerful interaction and a larger range of operation. Want to build a solid fastener? Use a pair of magnets instead of a neodymium and a steel. Exercise caution that when bringing together two magnets, the collision energy is massive. The levitation is a bit weaker than the attraction, but still significant.
*The magnetic induction for N-N configuration is approximately ~0 Gs at the midpoint of the gap (due to field cancellation).
* Calculations show friction force of two same magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Protective zones (implants) - warnings
MP 20x8/4x3 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	7.0 cm
Hearing aid	10 Gs (1.0 mT)	5.5 cm
Timepiece	20 Gs (2.0 mT)	4.5 cm
Mobile device	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

A strong magnetic field poses a serious hazard to electronics and pacemakers. These neodymiums generate a field that disrupts operation of digital equipment. Notice: the unseen radiation passes through tissues and plastic. Exceptional care must be taken by people with cochlear implants and drug dispensers. Also at risk are: mechanical watches, remotes, speakers, and screens. Do not bring the product near payment cards, hard drives, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - collision effects
MP 20x8/4x3 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	22.90 km/h (6.36 m/s)	0.14 J
30 mm	37.58 km/h (10.44 m/s)	0.37 J
50 mm	48.50 km/h (13.47 m/s)	0.62 J
100 mm	68.58 km/h (19.05 m/s)	1.23 J

NdFeB products are delicate – a violent impact against metal can result in shattering. Watch the impact speed – a magnet released freely speeds with massive force. Striking energy can trigger coating fragments or painful pinches to skin. Be sure to control the product during bringing near metal so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h ends with a crack of the neodymium. Use safety goggles when handling with powerful specimens.

Table 9: Coating parameters (durability)
MP 20x8/4x3 / 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. Note the thickness of the protective layer.

Table 10: Electrical data (Flux)
MP 20x8/4x3 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	5 044 Mx	50.4 µWb
P_c Coefficient	0.20	Low (Flat)

Flux value emitted by the pole surface. Key data for generator designers as well as sensors. P_c value defines the working geometry.

Table 11: Submerged application
MP 20x8/4x3 / N38

Environment	Effective steel pull	Effect
Air (land)	3.14 kg	Standard
Water (riverbed)	3.60 kg (+0.46 kg buoyancy gain)	+14.5%

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

The magnetic field penetrates through water without any losses. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Vertical hold

*Warning: On a vertical surface, the magnet retains merely approx. 20-30% of its nominal pull.

2. Plate thickness effect

*Thin steel (e.g. computer case) drastically weakens the holding force.

3. Heat tolerance

*For standard magnets, the max working temp is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.20

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

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%

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: 030187-2026

Measurement Calculator

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Kilograms (kg)

Newtons (N)

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The ring-shaped magnet MP 20x8/4x3 / N38 is created for mechanical fastening, where glue might fail or be insufficient. Mounting is clean and reversible, unlike gluing. It is also often used in advertising for fixing signs and in workshops for organizing tools.

This is a crucial issue when working with model MP 20x8/4x3 / N38. Neodymium magnets are sintered ceramics, which means they are very brittle and inelastic. One turn too many can destroy the magnet, so do it slowly. The flat screw head should evenly press the magnet. Remember: cracking during assembly results from material properties, not a product defect.

Moisture can penetrate micro-cracks in the coating and cause oxidation of the magnet. 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 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.

This model is characterized by dimensions Ø20x3 mm and a weight of 6.79 g. The pulling force of this model is an impressive 3.14 kg, which translates to 30.79 N in newtons. The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 8/4 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.

Advantages and disadvantages of neodymium magnets.

Advantages

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

They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (according to literature),
Magnets very well defend themselves against loss of magnetization caused by external fields,
In other words, due to the glossy layer of gold, the element is aesthetically pleasing,
Neodymium magnets deliver maximum magnetic induction on a small surface, which allows for strong attraction,
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...
In view of the option of accurate forming and adaptation to specialized requirements, neodymium magnets can be created in a broad palette of shapes and sizes, which expands the range of possible applications,
Key role in advanced technology sectors – they are commonly used in data components, drive modules, advanced medical instruments, as well as complex engineering applications.
Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Weaknesses

Characteristics of disadvantages of neodymium magnets and proposals for their use:

They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only shields the magnet but also improves its resistance to damage
We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
Magnets exposed to a humid environment can rust. Therefore during using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
We recommend a housing - magnetic mechanism, due to difficulties in producing threads inside the magnet and complex forms.
Health risk resulting from small fragments of magnets are risky, when accidentally swallowed, which gains importance in the context of child safety. Furthermore, small elements of these magnets can complicate diagnosis medical when they are in the body.
Due to neodymium price, their price is higher than average,

Lifting parameters

Maximum holding power of the magnet – what contributes to it?

The force parameter is a theoretical maximum value performed under standard conditions:

with the contact of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
with a thickness no less than 10 mm
with a surface free of scratches
under conditions of no distance (surface-to-surface)
for force applied at a right angle (pull-off, not shear)
at temperature room level

Key elements affecting lifting force

Please note that the working load will differ influenced by elements below, in order of importance:

Clearance – existence of any layer (paint, dirt, gap) interrupts the magnetic circuit, which reduces capacity rapidly (even by 50% at 0.5 mm).
Loading method – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet exhibits significantly lower power (typically approx. 20-30% of maximum force).
Plate thickness – too thin sheet causes magnetic saturation, causing part of the power to be lost into the air.
Steel grade – the best choice is high-permeability steel. Cast iron may have worse magnetic properties.
Surface quality – the more even the surface, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
Operating temperature – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and at low temperatures gain strength (up to a certain limit).

Holding force was checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a small distance between the magnet and the plate decreases the holding force.

Safe handling of neodymium magnets

Implant safety

Life threat: Neodymium magnets can deactivate pacemakers and defibrillators. Stay away if you have electronic implants.

Keep away from electronics

Remember: rare earth magnets generate a field that interferes with precision electronics. Keep a safe distance from your mobile, tablet, and navigation systems.

Sensitization to coating

Studies show that nickel (the usual finish) is a strong allergen. For allergy sufferers, refrain from direct skin contact and opt for versions in plastic housing.

Dust explosion hazard

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

Immense force

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

Do not give to children

Strictly keep magnets out of reach of children. Ingestion danger is high, and the consequences of magnets clamping inside the body are fatal.

Protective goggles

Despite the nickel coating, the material is delicate and cannot withstand shocks. Do not hit, as the magnet may crumble into hazardous fragments.

Heat warning

Watch the temperature. Heating the magnet above 80 degrees Celsius will ruin its magnetic structure and strength.

Safe distance

Intense magnetic fields can erase data on credit cards, HDDs, and other magnetic media. Keep a distance of min. 10 cm.

Bodily injuries

Big blocks can break fingers in a fraction of a second. Do not place your hand between two strong magnets.

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

MP 20x8/4x3 / N38 - ring magnet

Product card - MP 20x8/4x3 / 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 (pull vs distance) - power drop MP 20x8/4x3 / N38

Table 2: Sliding capacity (vertical surface) MP 20x8/4x3 / N38

Table 3: Vertical assembly (shearing) - vertical pull MP 20x8/4x3 / N38

Table 4: Steel thickness (substrate influence) - power losses MP 20x8/4x3 / N38

Table 5: Thermal resistance (stability) - resistance threshold MP 20x8/4x3 / N38

Table 6: Magnet-Magnet interaction (attraction) - field range MP 20x8/4x3 / N38

Table 7: Protective zones (implants) - warnings MP 20x8/4x3 / N38

Table 8: Collisions (kinetic energy) - collision effects MP 20x8/4x3 / N38

Table 9: Coating parameters (durability) MP 20x8/4x3 / N38

Table 10: Electrical data (Flux) MP 20x8/4x3 / N38

Table 11: Submerged application MP 20x8/4x3 / N38

1. Vertical hold

2. Plate thickness effect

3. Heat tolerance

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

Chemical composition

Environmental data

Force (pull)

Magnetic Induction

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Advantages and disadvantages of neodymium magnets.

Advantages

Weaknesses

Lifting parameters

Maximum holding power of the magnet – what contributes to it?

Key elements affecting lifting force

Safe handling of neodymium magnets

Implant safety

Keep away from electronics

Sensitization to coating

Dust explosion hazard

Immense force

Do not give to children

Protective goggles

Heat warning

Safe distance

Bodily injuries

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs distance) - power drop
MP 20x8/4x3 / N38

Table 2: Sliding capacity (vertical surface)
MP 20x8/4x3 / N38

Table 3: Vertical assembly (shearing) - vertical pull
MP 20x8/4x3 / N38

Table 4: Steel thickness (substrate influence) - power losses
MP 20x8/4x3 / N38

Table 5: Thermal resistance (stability) - resistance threshold
MP 20x8/4x3 / N38

Table 6: Magnet-Magnet interaction (attraction) - field range
MP 20x8/4x3 / N38

Table 7: Protective zones (implants) - warnings
MP 20x8/4x3 / N38

Table 8: Collisions (kinetic energy) - collision effects
MP 20x8/4x3 / N38

Table 9: Coating parameters (durability)
MP 20x8/4x3 / N38

Table 10: Electrical data (Flux)
MP 20x8/4x3 / N38

Table 11: Submerged application
MP 20x8/4x3 / N38