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MW 70x20 / N38 - cylindrical 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

cylindrical magnet

Catalog no 010095

GTIN/EAN: 5906301810940

5.00

Diameter Ø

70 mm [±0,1 mm]

Height

20 mm [±0,1 mm]

Weight

577.27 g

Magnetization Direction

↑ axial

Load capacity

99.83 kg / 979.31 N

Magnetic Induction

307.57 mT / 3076 Gs

Coating

[NiCuNi] Nickel

see properties »

239.85 ZŁ with VAT / pcs + price for transport

195.00 ZŁ net + 23% VAT / pcs

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Physical properties - MW 70x20 / N38 - cylindrical magnet

Specification / characteristics - MW 70x20 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010095
GTIN/EAN	5906301810940
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 Ø	70 mm [±0,1 mm]
Height	20 mm [±0,1 mm]
Weight	577.27 g
Magnetization Direction	↑ axial
Load capacity ~ ?	99.83 kg / 979.31 N
Magnetic Induction ~ ?	307.57 mT / 3076 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 70x20 / N38 - cylindrical magnet

properties	values	units
remenance Br [min. - max.] ?	12.2-12.6	kGs
remenance Br [min. - max.] ?	1220-1260	mT
coercivity bHc ?	10.8-11.5	kOe
coercivity bHc ?	860-915	kA/m
actual internal force iHc	≥ 12	kOe
actual internal force iHc	≥ 955	kA/m
energy density [min. - max.] ?	36-38	BH max MGOe
energy density [min. - max.] ?	287-303	BH max KJ/m
max. temperature ?	≤ 80	°C

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

properties	values	units
Vickers hardness	≥550	Hv
Density	≥7.4	g/cm³
Curie Temperature TC	312 - 380	°C
Curie Temperature TF	593 - 716	°F
Specific resistance	150	μΩ⋅cm
Bending strength	250	MPa
Compressive strength	1000~1100	MPa
Thermal expansion parallel (∥) to orientation (M)	(3-4) x 10^-6	°C^-1
Thermal expansion perpendicular (⊥) to orientation (M)	-(1-3) x 10^-6	°C^-1
Young's modulus	1.7 x 10⁴	kg/mm²

Physical simulation of the magnet - data

Presented information constitute the outcome of a physical calculation. Results rely on algorithms for the material Nd₂Fe₁₄B. Real-world conditions may deviate from the simulation results. Please consider these calculations as a preliminary roadmap for designers.

Table 1: Static force (pull vs distance) - characteristics
MW 70x20 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	3075 Gs 307.5 mT	99.83 kg / 220.09 LBS 99830.0 g / 979.3 N	crushing
1 mm	3013 Gs 301.3 mT	95.80 kg / 211.21 LBS 95804.4 g / 939.8 N	crushing
2 mm	2946 Gs 294.6 mT	91.59 kg / 201.92 LBS 91587.7 g / 898.5 N	crushing
3 mm	2875 Gs 287.5 mT	87.27 kg / 192.39 LBS 87266.0 g / 856.1 N	crushing
5 mm	2727 Gs 272.7 mT	78.48 kg / 173.02 LBS 78482.2 g / 769.9 N	crushing
10 mm	2332 Gs 233.2 mT	57.38 kg / 126.50 LBS 57380.6 g / 562.9 N	crushing
15 mm	1942 Gs 194.2 mT	39.80 kg / 87.73 LBS 39795.7 g / 390.4 N	crushing
20 mm	1590 Gs 159.0 mT	26.68 kg / 58.82 LBS 26680.3 g / 261.7 N	crushing
30 mm	1044 Gs 104.4 mT	11.51 kg / 25.38 LBS 11511.2 g / 112.9 N	crushing
50 mm	466 Gs 46.6 mT	2.29 kg / 5.06 LBS 2294.1 g / 22.5 N	strong

Grip strength weakens significantly with every subsequent millimeter of distance. Note that every additional insulation layer (e.g., dirt, varnish, dust) significantly weakens the grip. Magnetic products hold most effectively in perfect adhesion; gap drastically cuts the power. Observe how flashily the load capacity drop, when the magnet does not adhere flatly to the steel surface. When designing the mounting, avoid redundant distances.

Table 2: Shear force (wall)
MW 70x20 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	19.97 kg / 44.02 LBS 19966.0 g / 195.9 N
1 mm	Stal (~0.2)	19.16 kg / 42.24 LBS 19160.0 g / 188.0 N
2 mm	Stal (~0.2)	18.32 kg / 40.38 LBS 18318.0 g / 179.7 N
3 mm	Stal (~0.2)	17.45 kg / 38.48 LBS 17454.0 g / 171.2 N
5 mm	Stal (~0.2)	15.70 kg / 34.60 LBS 15696.0 g / 154.0 N
10 mm	Stal (~0.2)	11.48 kg / 25.30 LBS 11476.0 g / 112.6 N
15 mm	Stal (~0.2)	7.96 kg / 17.55 LBS 7960.0 g / 78.1 N
20 mm	Stal (~0.2)	5.34 kg / 11.76 LBS 5336.0 g / 52.3 N
30 mm	Stal (~0.2)	2.30 kg / 5.08 LBS 2302.0 g / 22.6 N
50 mm	Stal (~0.2)	0.46 kg / 1.01 LBS 458.0 g / 4.5 N

The following data defines the theoretical shear load required to start the downward movement of the magnet vertically on a vertical metal surface (considering standard friction). The holding force is a function of the gap size between the magnet and the surface.

Table 3: Vertical assembly (sliding) - vertical pull
MW 70x20 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	29.95 kg / 66.03 LBS 29949.0 g / 293.8 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	19.97 kg / 44.02 LBS 19966.0 g / 195.9 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	9.98 kg / 22.01 LBS 9983.0 g / 97.9 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	49.92 kg / 110.04 LBS 49915.0 g / 489.7 N

When mounting a element on a upright wall (e.g., a board), it will maintain only approx. 1/5 of nominal attraction strength. Gravitational force and a low friction coefficient influence the fact that magnets slip faster than they pop off the substrate. Want to create a vertical fastening? Consider that the shear force is noticeably lower than the maximum static pull force. On a slippery surface, the element will give way down under a significantly smaller weight. Using a rubber pad can effectively increase the grip.

Table 4: Material efficiency (saturation) - power losses
MW 70x20 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	3%	3.33 kg / 7.34 LBS 3327.7 g / 32.6 N
1 mm	8%	8.32 kg / 18.34 LBS 8319.2 g / 81.6 N
2 mm	17%	16.64 kg / 36.68 LBS 16638.3 g / 163.2 N
3 mm	25%	24.96 kg / 55.02 LBS 24957.5 g / 244.8 N
5 mm	42%	41.60 kg / 91.70 LBS 41595.8 g / 408.1 N
10 mm	83%	83.19 kg / 183.41 LBS 83191.7 g / 816.1 N
11 mm	92%	91.51 kg / 201.75 LBS 91510.8 g / 897.7 N
12 mm	100%	99.83 kg / 220.09 LBS 99830.0 g / 979.3 N

A too thin steel is incapable of absorb the full magnetic flux, which squanders power of the magnet. Should you install a neodymium to a weak sheet, the flux will pass right through and the holding will be smaller. To utilize the maximum of this magnet's potential, you need a suitably thick piece of steel. The material oversaturation causes that on sheet metal structures (e.g., car bodies), the product works worse. We suggest choosing the steel thickness according to the table below.

Table 5: Thermal resistance (material behavior) - power drop
MW 70x20 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	99.83 kg / 220.09 LBS 99830.0 g / 979.3 N	OK
40 °C	-2.2%	97.63 kg / 215.25 LBS 97633.7 g / 957.8 N	OK
60 °C	-4.4%	95.44 kg / 210.40 LBS 95437.5 g / 936.2 N
80 °C	-6.6%	93.24 kg / 205.56 LBS 93241.2 g / 914.7 N
100 °C	-28.8%	71.08 kg / 156.70 LBS 71079.0 g / 697.3 N

Standard neodymium magnets irreversibly lose parameters after exceeding the maximum temperature. Watch out for overheating – excessive heat can irreversibly damage this magnet. With increasing heat, the neodymium's power momentarily lowers. Avoid using this magnet near heat sources exceeding its working range. Too high temperature will lead to irreversible degradation of magnetism.

*Important note: Temperature resistance depends not only on the material grade, as well as the dimension ratios. Flat magnets (low Pc) may lose charge permanently sooner than taller cylinders. The danger warning in the table points to a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - field range
MW 70x20 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	224.41 kg / 494.73 LBS 4 665 Gs	33.66 kg / 74.21 LBS 33661 g / 330.2 N	N/A
1 mm	219.98 kg / 484.97 LBS 6 090 Gs	33.00 kg / 72.74 LBS 32997 g / 323.7 N	197.98 kg / 436.47 LBS ~0 Gs
2 mm	215.36 kg / 474.78 LBS 6 026 Gs	32.30 kg / 71.22 LBS 32304 g / 316.9 N	193.82 kg / 427.31 LBS ~0 Gs
3 mm	210.66 kg / 464.41 LBS 5 959 Gs	31.60 kg / 69.66 LBS 31598 g / 310.0 N	189.59 kg / 417.97 LBS ~0 Gs
5 mm	201.05 kg / 443.23 LBS 5 822 Gs	30.16 kg / 66.48 LBS 30157 g / 295.8 N	180.94 kg / 398.91 LBS ~0 Gs
10 mm	176.42 kg / 388.94 LBS 5 454 Gs	26.46 kg / 58.34 LBS 26463 g / 259.6 N	158.78 kg / 350.05 LBS ~0 Gs
20 mm	128.99 kg / 284.36 LBS 4 663 Gs	19.35 kg / 42.65 LBS 19348 g / 189.8 N	116.09 kg / 255.93 LBS ~0 Gs
50 mm	39.50 kg / 87.08 LBS 2 581 Gs	5.93 kg / 13.06 LBS 5925 g / 58.1 N	35.55 kg / 78.38 LBS ~0 Gs
60 mm	25.88 kg / 57.05 LBS 2 089 Gs	3.88 kg / 8.56 LBS 3881 g / 38.1 N	23.29 kg / 51.34 LBS ~0 Gs
70 mm	17.01 kg / 37.49 LBS 1 693 Gs	2.55 kg / 5.62 LBS 2551 g / 25.0 N	15.31 kg / 33.74 LBS ~0 Gs
80 mm	11.28 kg / 24.86 LBS 1 379 Gs	1.69 kg / 3.73 LBS 1692 g / 16.6 N	10.15 kg / 22.38 LBS ~0 Gs
90 mm	7.57 kg / 16.69 LBS 1 130 Gs	1.14 kg / 2.50 LBS 1136 g / 11.1 N	6.81 kg / 15.02 LBS ~0 Gs
100 mm	5.16 kg / 11.37 LBS 932 Gs	0.77 kg / 1.71 LBS 774 g / 7.6 N	4.64 kg / 10.23 LBS ~0 Gs

Two strong neodymiums attract each other from a wider radius than a magnet and sheet setup. The setup of magnet-to-magnet produces a massive flux and a further horizon of action. Designing a strong closure? Apply two magnets instead of one magnet and a steel. Exercise caution that when bringing together two magnets, the pinch force is extreme. The levitation is marginally weaker than the attraction, but still impressive.
*Flux density for N-N configuration reaches ~0 Gs in the exact middle of the gap (caused by magnetic field nullification).
Important: Estimates refer to shear force of dual identical magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (implants) - warnings
MW 70x20 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	30.5 cm
Hearing aid	10 Gs (1.0 mT)	24.0 cm
Mechanical watch	20 Gs (2.0 mT)	18.5 cm
Mobile device	40 Gs (4.0 mT)	14.5 cm
Car key	50 Gs (5.0 mT)	13.5 cm
Payment card	400 Gs (40.0 mT)	5.5 cm
HDD hard drive	600 Gs (60.0 mT)	4.5 cm

A strong magnetic field poses a serious hazard to IT equipment as well as medical implants. These magnets generate a field that prevents correct functioning of digital equipment. Be aware: the unseen radiation penetrates the body and housings. Increased vigilance must be taken by people with cochlear implants and drug dispensers. The risk also applies to: mechanical watches, remotes, speakers, and displays. Do not bring the product near payment cards, hard drives, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - warning
MW 70x20 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	17.39 km/h (4.83 m/s)	6.73 J
30 mm	24.57 km/h (6.83 m/s)	13.45 J
50 mm	30.08 km/h (8.36 m/s)	20.15 J
100 mm	41.97 km/h (11.66 m/s)	39.23 J

Neodymium magnets are delicate – a collision with steel causes immediate chipping. Control the attraction moment – a neodymium left loose speeds with massive force. Kinetic force can trigger coating fragments or dangerous crushing to fingers. Be sure to control the product during installation so it doesn't slam with momentum against the steel surface. A collision at high speed almost guarantees destruction of the neodymium. Wear safety glasses when working with large magnets.

Table 9: Surface protection spec
MW 70x20 / 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. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction data (Flux)
MW 70x20 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	128 363 Mx	1283.6 µWb
P_c Coefficient	0.39	Low (Flat)

Flux value passing through the magnet pole. Essential parameter in coil applications as well as sensors. The P_c coefficient defines the working geometry.

Table 11: Underwater work (magnet fishing)
MW 70x20 / N38

Environment	Effective steel pull	Effect
Air (land)	99.83 kg	Standard
Water (riverbed)	114.31 kg (+14.48 kg buoyancy gain)	+14.5%

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

In water, the magnet feels stronger thanks to Archimedes' principle. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Wall mount (shear)

*Caution: On a vertical surface, the magnet holds only a fraction of its perpendicular strength.

2. Steel saturation

*Thin metal sheet (e.g. computer case) drastically reduces the holding force.

3. Thermal stability

*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) = 0.39

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.

Technical specification and ecology

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%

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: 010095-2026

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The presented product is a very strong rod magnet, composed of advanced NdFeB material, which, with dimensions of Ø70x20 mm, guarantees maximum efficiency. The MW 70x20 / N38 component is characterized by a tolerance of ±0.1mm and professional build quality, making it a perfect solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 99.83 kg), this product is available off-the-shelf from our European logistics center, ensuring lightning-fast order fulfillment. Furthermore, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.

It finds application in modeling, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power of 979.31 N with a weight of only 577.27 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.

Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 70.1 mm) using two-component epoxy glues. To ensure long-term durability in industry, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.

Magnets NdFeB grade N38 are suitable for the majority of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø70x20), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.

This model is characterized by dimensions Ø70x20 mm, which, at a weight of 577.27 g, makes it an element with high magnetic energy density. The key parameter here is the holding force amounting to approximately 99.83 kg (force ~979.31 N), which, with such defined dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.

Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 70 mm. Such an arrangement is most desirable when connecting magnets in stacks (e.g., in filters) or when mounting in sockets at the bottom of a hole. On request, we can also produce versions magnetized diametrically if your project requires it.

Strengths and weaknesses of neodymium magnets.

Advantages

Besides their high retention, neodymium magnets are valued for these benefits:

They have constant strength, and over around ten years their performance decreases symbolically – ~1% (according to theory),
They possess excellent resistance to weakening of magnetic properties when exposed to external magnetic sources,
Thanks to the reflective finish, the surface of Ni-Cu-Ni, gold, or silver gives an modern appearance,
Magnetic induction on the surface of the magnet is maximum,
Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
Thanks to freedom in forming and the ability to adapt to complex applications,
Fundamental importance in modern industrial fields – they are utilized in HDD drives, electric motors, advanced medical instruments, also industrial machines.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages

Disadvantages of neodymium magnets:

They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
Neodymium magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
We recommend cover - magnetic mount, due to difficulties in realizing threads inside the magnet and complex shapes.
Health risk related to microscopic parts of magnets pose a threat, in case of ingestion, which becomes key in the context of child safety. Furthermore, tiny parts of these magnets are able to be problematic in diagnostics medical after entering the body.
With large orders the cost of neodymium magnets is a challenge,

Lifting parameters

Detachment force of the magnet in optimal conditions – what contributes to it?

Breakaway force is the result of a measurement for optimal configuration, taking into account:

on a base made of structural steel, optimally conducting the magnetic flux
possessing a thickness of minimum 10 mm to ensure full flux closure
with an ground touching surface
under conditions of ideal adhesion (metal-to-metal)
under perpendicular force vector (90-degree angle)
at conditions approx. 20°C

Practical lifting capacity: influencing factors

Effective lifting capacity impacted by working environment parameters, such as (from priority):

Distance (betwixt the magnet and the metal), as even a very small clearance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to varnish, corrosion or debris).
Load vector – highest force is reached only during pulling at a 90° angle. The force required to slide of the magnet along the plate is typically several times lower (approx. 1/5 of the lifting capacity).
Steel thickness – insufficiently thick plate does not close the flux, causing part of the power to be lost into the air.
Material type – the best choice is high-permeability steel. Hardened steels may have worse magnetic properties.
Base smoothness – the more even the plate, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
Heat – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and in frost gain strength (up to a certain limit).

Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the load capacity is reduced by as much as 75%. In addition, even a small distance between the magnet’s surface and the plate reduces the holding force.

H&S for magnets

Nickel allergy

A percentage of the population have a contact allergy to nickel, which is the standard coating for NdFeB magnets. Frequent touching may cause an allergic reaction. We recommend wear safety gloves.

Permanent damage

Monitor thermal conditions. Exposing the magnet to high heat will destroy its properties and strength.

Do not give to children

Product intended for adults. Small elements can be swallowed, causing intestinal necrosis. Keep out of reach of kids and pets.

Conscious usage

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

Phone sensors

Be aware: neodymium magnets produce a field that confuses precision electronics. Keep a separation from your phone, device, and navigation systems.

Dust is flammable

Machining of neodymium magnets carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Safe distance

Device Safety: Strong magnets can ruin data carriers and delicate electronics (heart implants, medical aids, mechanical watches).

Material brittleness

Despite metallic appearance, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.

Physical harm

Large magnets can crush fingers in a fraction of a second. Under no circumstances put your hand between two attracting surfaces.

Warning for heart patients

Individuals with a pacemaker should maintain an large gap from magnets. The magnetism can interfere with the operation of the life-saving device.

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

MW 70x20 / N38 - cylindrical magnet

Physical properties - MW 70x20 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical simulation of the magnet - data

Table 1: Static force (pull vs distance) - characteristics MW 70x20 / N38

Table 2: Shear force (wall) MW 70x20 / N38

Table 3: Vertical assembly (sliding) - vertical pull MW 70x20 / N38

Table 4: Material efficiency (saturation) - power losses MW 70x20 / N38

Table 5: Thermal resistance (material behavior) - power drop MW 70x20 / N38

Table 6: Two magnets (attraction) - field range MW 70x20 / N38

Table 7: Safety (HSE) (implants) - warnings MW 70x20 / N38

Table 8: Collisions (kinetic energy) - warning MW 70x20 / N38

Table 9: Surface protection spec MW 70x20 / N38

Table 10: Construction data (Flux) MW 70x20 / N38

Table 11: Underwater work (magnet fishing) MW 70x20 / N38

1. Wall mount (shear)

2. Steel saturation

3. Thermal stability

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

Chemical composition

Sustainability

Magnet pull force

Magnetic Field

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Strengths and weaknesses of neodymium magnets.

Advantages

Disadvantages

Lifting parameters

Detachment force of the magnet in optimal conditions – what contributes to it?

Practical lifting capacity: influencing factors

H&S for magnets

Nickel allergy

Permanent damage

Do not give to children

Conscious usage

Phone sensors

Dust is flammable

Safe distance

Material brittleness

Physical harm

Warning for heart patients

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs distance) - characteristics
MW 70x20 / N38

Table 2: Shear force (wall)
MW 70x20 / N38

Table 3: Vertical assembly (sliding) - vertical pull
MW 70x20 / N38

Table 4: Material efficiency (saturation) - power losses
MW 70x20 / N38

Table 5: Thermal resistance (material behavior) - power drop
MW 70x20 / N38

Table 6: Two magnets (attraction) - field range
MW 70x20 / N38

Table 7: Safety (HSE) (implants) - warnings
MW 70x20 / N38

Table 8: Collisions (kinetic energy) - warning
MW 70x20 / N38

Table 9: Surface protection spec
MW 70x20 / N38

Table 10: Construction data (Flux)
MW 70x20 / N38

Table 11: Underwater work (magnet fishing)
MW 70x20 / N38