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MP 20x8/4x5 / 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 030333

GTIN/EAN: 5906301812272

5.00

Diameter

20 mm [±0,1 mm]

internal diameter Ø

8/4 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

11.31 g

Magnetization Direction

↑ axial

Load capacity

6.65 kg / 65.21 N

Magnetic Induction

277.16 mT / 2772 Gs

Coating

[NiCuNi] Nickel

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7.75 ZŁ with VAT / pcs + price for transport

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Technical - MP 20x8/4x5 / N38 - ring magnet

Specification / characteristics - MP 20x8/4x5 / N38 - ring magnet

properties

properties	values
Cat. no.	030333
GTIN/EAN	5906301812272
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	5 mm [±0,1 mm]
Weight	11.31 g
Magnetization Direction	↑ axial
Load capacity ~ ?	6.65 kg / 65.21 N
Magnetic Induction ~ ?	277.16 mT / 2772 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 20x8/4x5 / 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

Technical analysis of the assembly - technical parameters

These data constitute the result of a mathematical calculation. Values were calculated on algorithms for the class Nd₂Fe₁₄B. Real-world conditions may differ. Please consider these data as a preliminary roadmap during assembly planning.

Table 1: Static force (pull vs distance) - characteristics
MP 20x8/4x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2424 Gs 242.4 mT	6.65 kg / 14.66 LBS 6650.0 g / 65.2 N	strong
1 mm	2265 Gs 226.5 mT	5.81 kg / 12.80 LBS 5807.9 g / 57.0 N	strong
2 mm	2070 Gs 207.0 mT	4.85 kg / 10.69 LBS 4851.0 g / 47.6 N	strong
3 mm	1858 Gs 185.8 mT	3.91 kg / 8.61 LBS 3906.5 g / 38.3 N	strong
5 mm	1437 Gs 143.7 mT	2.34 kg / 5.16 LBS 2338.7 g / 22.9 N	strong
10 mm	691 Gs 69.1 mT	0.54 kg / 1.19 LBS 540.5 g / 5.3 N	weak grip
15 mm	343 Gs 34.3 mT	0.13 kg / 0.29 LBS 133.3 g / 1.3 N	weak grip
20 mm	186 Gs 18.6 mT	0.04 kg / 0.09 LBS 39.3 g / 0.4 N	weak grip
30 mm	70 Gs 7.0 mT	0.01 kg / 0.01 LBS 5.5 g / 0.1 N	weak grip
50 mm	18 Gs 1.8 mT	0.00 kg / 0.00 LBS 0.4 g / 0.0 N	weak grip

Magnetic force decreases significantly with every subsequent millimeter of distance. Keep in mind that even the smallest gap (e.g., contamination, varnish, veneer) noticeably weakens the grip. Magnetic products hold most effectively during direct contact; air break drastically cuts the force. Analyze how flashily the pull force plummet, when the magnet does not adhere tightly to the metal substrate. When planning the assembly, avoid unnecessary gaps.

Table 2: Slippage capacity (wall)
MP 20x8/4x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.33 kg / 2.93 LBS 1330.0 g / 13.0 N
1 mm	Stal (~0.2)	1.16 kg / 2.56 LBS 1162.0 g / 11.4 N
2 mm	Stal (~0.2)	0.97 kg / 2.14 LBS 970.0 g / 9.5 N
3 mm	Stal (~0.2)	0.78 kg / 1.72 LBS 782.0 g / 7.7 N
5 mm	Stal (~0.2)	0.47 kg / 1.03 LBS 468.0 g / 4.6 N
10 mm	Stal (~0.2)	0.11 kg / 0.24 LBS 108.0 g / 1.1 N
15 mm	Stal (~0.2)	0.03 kg / 0.06 LBS 26.0 g / 0.3 N
20 mm	Stal (~0.2)	0.01 kg / 0.02 LBS 8.0 g / 0.1 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 2.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N

The table below presents the approximate holding capacity needed to start the shifting of the magnet vertically on a upright steel plate (considering standard friction coefficient). This parameter is a function of the distance between the magnet and the surface.

Table 3: Vertical assembly (sliding) - vertical pull
MP 20x8/4x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.00 kg / 4.40 LBS 1995.0 g / 19.6 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.33 kg / 2.93 LBS 1330.0 g / 13.0 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.67 kg / 1.47 LBS 665.0 g / 6.5 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.33 kg / 7.33 LBS 3325.0 g / 32.6 N

When placing a element on a upright plane (e.g., a board), it you can count on barely about 20%-30% of its nominal power. Gravitational force as well as a low friction coefficient mean that products slip easier than they detach. Designing a vertical fastening? Consider that the sliding force is noticeably lower than the maximum static pull force. On a slippery surface, the element will slip down under a significantly smaller weight. Using a rubber layer can significantly improve the result.

Table 4: Steel thickness (saturation) - sheet metal selection
MP 20x8/4x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.67 kg / 1.47 LBS 665.0 g / 6.5 N
1 mm	25%	1.66 kg / 3.67 LBS 1662.5 g / 16.3 N
2 mm	50%	3.33 kg / 7.33 LBS 3325.0 g / 32.6 N
3 mm	75%	4.99 kg / 11.00 LBS 4987.5 g / 48.9 N
5 mm	100%	6.65 kg / 14.66 LBS 6650.0 g / 65.2 N
10 mm	100%	6.65 kg / 14.66 LBS 6650.0 g / 65.2 N
11 mm	100%	6.65 kg / 14.66 LBS 6650.0 g / 65.2 N
12 mm	100%	6.65 kg / 14.66 LBS 6650.0 g / 65.2 N

A too thin steel is unable to absorb the full magnetic flux, which weakens actual performance of the magnet. Should you install a neodymium to a thin surface, the field will penetrate right through and the pull force will drop sharply. To utilize 100% of this neodymium's potential, you require a sufficiently solid element of steel. The saturation phenomenon means that on thin elements (e.g., car bodies), the magnet works worse. We recommend selecting the steel cross-section according to the table below.

Table 5: Thermal resistance (material behavior) - thermal limit
MP 20x8/4x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	6.65 kg / 14.66 LBS 6650.0 g / 65.2 N	OK
40 °C	-2.2%	6.50 kg / 14.34 LBS 6503.7 g / 63.8 N	OK
60 °C	-4.4%	6.36 kg / 14.02 LBS 6357.4 g / 62.4 N
80 °C	-6.6%	6.21 kg / 13.69 LBS 6211.1 g / 60.9 N
100 °C	-28.8%	4.73 kg / 10.44 LBS 4734.8 g / 46.4 N

Standard neodymium magnets lose strength after exceeding the maximum temperature. Protect against heat – excessive heat can irreversibly destroy this product. With every degree above norm, the neodymium's force briefly lowers. Refrain from using this product in hot environments higher than its operating temperature limit. Exceeding the critical threshold will result in destruction of magnetism.

*Important note: Thermal stability is determined by both grade, but also on the magnet's shape. Flat magnets (low permeance coefficient) risk losing magnetic properties at lower temperatures than taller cylinders. The danger warning in the table signals a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MP 20x8/4x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	9.28 kg / 20.47 LBS 4 012 Gs	1.39 kg / 3.07 LBS 1393 g / 13.7 N	N/A
1 mm	8.73 kg / 19.25 LBS 4 701 Gs	1.31 kg / 2.89 LBS 1310 g / 12.8 N	7.86 kg / 17.33 LBS ~0 Gs
2 mm	8.11 kg / 17.88 LBS 4 530 Gs	1.22 kg / 2.68 LBS 1216 g / 11.9 N	7.30 kg / 16.09 LBS ~0 Gs
3 mm	7.45 kg / 16.42 LBS 4 342 Gs	1.12 kg / 2.46 LBS 1117 g / 11.0 N	6.70 kg / 14.78 LBS ~0 Gs
5 mm	6.10 kg / 13.45 LBS 3 930 Gs	0.92 kg / 2.02 LBS 915 g / 9.0 N	5.49 kg / 12.11 LBS ~0 Gs
10 mm	3.27 kg / 7.20 LBS 2 875 Gs	0.49 kg / 1.08 LBS 490 g / 4.8 N	2.94 kg / 6.48 LBS ~0 Gs
20 mm	0.75 kg / 1.66 LBS 1 382 Gs	0.11 kg / 0.25 LBS 113 g / 1.1 N	0.68 kg / 1.50 LBS ~0 Gs
50 mm	0.02 kg / 0.04 LBS 220 Gs	0.00 kg / 0.01 LBS 3 g / 0.0 N	0.02 kg / 0.04 LBS ~0 Gs
60 mm	0.01 kg / 0.02 LBS 139 Gs	0.00 kg / 0.00 LBS 1 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
70 mm	0.00 kg / 0.01 LBS 93 Gs	0.00 kg / 0.00 LBS 1 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
80 mm	0.00 kg / 0.00 LBS 65 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 47 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 35 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs

Two magnets 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 operation. Want to build a solid fastener? Utilize two neodymiums instead of a neodymium and a striker plate. Remember that when connecting a pair of magnets, the impact force is extreme. The levitation is a bit weaker than the attraction, but still large.
*Field value between like poles reaches ~0 Gs in the exact middle of the gap (due to field cancellation).
* Calculations show friction force of two identical neodymium magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Protective zones (implants) - precautionary measures
MP 20x8/4x5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	8.0 cm
Hearing aid	10 Gs (1.0 mT)	6.5 cm
Timepiece	20 Gs (2.0 mT)	5.0 cm
Phone / Smartphone	40 Gs (4.0 mT)	4.0 cm
Remote	50 Gs (5.0 mT)	3.5 cm
Payment card	400 Gs (40.0 mT)	1.5 cm
HDD hard drive	600 Gs (60.0 mT)	1.5 cm

Extremely neodym field is a serious hazard to IT equipment as well as medical implants. These magnets produce a field that prevents correct functioning of sensitive medical devices. Be aware: the unseen radiation penetrates the body and glass. Exceptional care must be taken by people with hearing aids and drug dispensers. Influence will be felt by: mechanical watches, car keys, speakers, and displays. Do not bring the product near payment cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - warning
MP 20x8/4x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	25.67 km/h (7.13 m/s)	0.29 J
30 mm	42.38 km/h (11.77 m/s)	0.78 J
50 mm	54.68 km/h (15.19 m/s)	1.30 J
100 mm	77.33 km/h (21.48 m/s)	2.61 J

Magnetic elements are delicate – a strong collision with metal risks their cracking. Pay attention to connection velocity – a neodymium left loose speeds with massive force. Striking energy can trigger coating fragments or dangerous crushing to skin. Hold the magnet firmly during mounting so it doesn't hit violently against the metal. A collision at high speed almost guarantees destruction of the neodymium. Wear safety glasses when working with large magnets.

Table 9: Anti-corrosion coating durability
MP 20x8/4x5 / 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)

Neodymium magnets are highly susceptible to corrosion without proper protection. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (P_c)
MP 20x8/4x5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	7 218 Mx	72.2 µWb
P_c Coefficient	0.31	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 20x8/4x5 / N38

Environment	Effective steel pull	Effect
Air (land)	6.65 kg	Standard
Water (riverbed)	7.61 kg (+0.96 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. Buoyancy helps in lifting finds.

1. Sliding resistance

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

2. Steel saturation

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

3. Heat tolerance

*For N38 material, 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) = 0.31

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

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: 030333-2026

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It is ideally suited for places where solid attachment of the magnet to the substrate is required without the risk of detachment. 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 6.65 kg works great as a door latch, speaker holder, or mounting element in devices.

This material behaves more like porcelain than steel, so it doesn't forgive mistakes during mounting. One turn too many can destroy the magnet, so do it slowly. It's a good idea to use a rubber spacer under the screw head, which will cushion the stresses. 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 does not ensure full waterproofing. In the place of the mounting hole, the coating is thinner and easily scratched when tightening the screw, which will become a corrosion focus. This product is dedicated for inside building use. For outdoor applications, we recommend choosing magnets in hermetic housing or additional protection with varnish.

A screw or bolt with a thread diameter smaller than 8/4 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 Ø20x5 mm and a weight of 11.31 g. The pulling force of this model is an impressive 6.65 kg, which translates to 65.21 N in newtons. The mounting hole diameter is precisely 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.

Strengths and weaknesses of Nd₂Fe₁₄B magnets.

Strengths

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

Their magnetic field remains stable, and after approximately ten years it decreases only by ~1% (theoretically),
They possess excellent resistance to magnetic field loss when exposed to external magnetic sources,
The use of an shiny coating of noble metals (nickel, gold, silver) causes the element to present itself better,
They are known for high magnetic induction at the operating surface, which improves attraction properties,
Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
Considering the option of precise forming and adaptation to specialized requirements, neodymium magnets can be created in a variety of geometric configurations, which expands the range of possible applications,
Universal use in modern technologies – they are commonly used in HDD drives, electric drive systems, medical equipment, as well as other advanced devices.
Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Cons

Disadvantages of NdFeB magnets:

To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
Due to limitations in realizing threads and complex forms in magnets, we propose using cover - magnetic mount.
Potential hazard to health – tiny shards of magnets are risky, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small components of these magnets can disrupt the diagnostic process medical in case of swallowing.
Due to complex production process, their price is higher than average,

Holding force characteristics

Maximum holding power of the magnet – what affects it?

The declared magnet strength represents the peak performance, obtained under optimal environment, meaning:

on a plate made of mild steel, effectively closing the magnetic flux
possessing a thickness of min. 10 mm to avoid saturation
with a plane cleaned and smooth
without any clearance between the magnet and steel
for force applied at a right angle (in the magnet axis)
in stable room temperature

Magnet lifting force in use – key factors

It is worth knowing that the application force may be lower subject to elements below, in order of importance:

Distance – existence of foreign body (paint, dirt, air) acts as an insulator, which reduces capacity rapidly (even by 50% at 0.5 mm).
Force direction – note that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
Chemical composition of the base – mild steel gives the best results. Alloy admixtures reduce magnetic permeability and lifting capacity.
Surface quality – the more even the surface, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
Thermal factor – hot environment reduces magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity was determined by applying a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, however under parallel forces the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate decreases the lifting capacity.

H&S for magnets

Skin irritation risks

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If an allergic reaction occurs, cease working with magnets and wear gloves.

Phone sensors

Navigation devices and smartphones are highly susceptible to magnetic fields. Close proximity with a strong magnet can decalibrate the internal compass in your phone.

Power loss in heat

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

Serious injuries

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

Do not underestimate power

Handle magnets with awareness. Their huge power can surprise even professionals. Plan your moves and do not underestimate their force.

Dust is flammable

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

Magnets are brittle

NdFeB magnets are sintered ceramics, meaning they are very brittle. Clashing of two magnets will cause them cracking into shards.

Life threat

For implant holders: Powerful magnets disrupt medical devices. Keep minimum 30 cm distance or request help to work with the magnets.

Magnetic media

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

No play value

These products are not intended for children. Accidental ingestion of multiple magnets can lead to them attracting across intestines, which constitutes a critical condition and necessitates urgent medical intervention.

Danger! Need more info? Check our post: Are neodymium magnets dangerous?

MP 20x8/4x5 / N38 - ring magnet

Technical - MP 20x8/4x5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical analysis of the assembly - technical parameters

Table 1: Static force (pull vs distance) - characteristics MP 20x8/4x5 / N38

Table 2: Slippage capacity (wall) MP 20x8/4x5 / N38

Table 3: Vertical assembly (sliding) - vertical pull MP 20x8/4x5 / N38

Table 4: Steel thickness (saturation) - sheet metal selection MP 20x8/4x5 / N38

Table 5: Thermal resistance (material behavior) - thermal limit MP 20x8/4x5 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field collision MP 20x8/4x5 / N38

Table 7: Protective zones (implants) - precautionary measures MP 20x8/4x5 / N38

Table 8: Dynamics (kinetic energy) - warning MP 20x8/4x5 / N38

Table 9: Anti-corrosion coating durability MP 20x8/4x5 / N38

Table 10: Electrical data (Pc) MP 20x8/4x5 / N38

Table 11: Hydrostatics and buoyancy MP 20x8/4x5 / N38

1. Sliding resistance

2. Steel saturation

3. Heat tolerance

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

Material specification

Sustainability

Pulling force

Magnetic Induction

Other products

SM 32x100 [2xM8] / N42 - magnetic separator

MW 10x1.5 / N38 - cylindrical magnet

MPL 15x2x30 / N38 - lamellar magnet

AM ucho [M12] - magnetic accessories

Strengths and weaknesses of Nd2Fe14B magnets.

Strengths

Cons

Holding force characteristics

Maximum holding power of the magnet – what affects it?

Magnet lifting force in use – key factors

H&S for magnets

Skin irritation risks

Phone sensors

Power loss in heat

Serious injuries

Do not underestimate power

Dust is flammable

Magnets are brittle

Life threat

Magnetic media

No play value

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs distance) - characteristics
MP 20x8/4x5 / N38

Table 2: Slippage capacity (wall)
MP 20x8/4x5 / N38

Table 3: Vertical assembly (sliding) - vertical pull
MP 20x8/4x5 / N38

Table 4: Steel thickness (saturation) - sheet metal selection
MP 20x8/4x5 / N38

Table 5: Thermal resistance (material behavior) - thermal limit
MP 20x8/4x5 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MP 20x8/4x5 / N38

Table 7: Protective zones (implants) - precautionary measures
MP 20x8/4x5 / N38

Table 8: Dynamics (kinetic energy) - warning
MP 20x8/4x5 / N38

Table 9: Anti-corrosion coating durability
MP 20x8/4x5 / N38

Table 10: Electrical data (P_c)
MP 20x8/4x5 / N38

Table 11: Hydrostatics and buoyancy
MP 20x8/4x5 / N38

Strengths and weaknesses of Nd₂Fe₁₄B magnets.