Product available Ships tomorrow

MW 8x4 / 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 010104

GTIN/EAN: 5906301811039

5.00

Diameter Ø

8 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

1.51 g

Magnetization Direction

↑ axial

Load capacity

2.04 kg / 20.00 N

Magnetic Induction

437.78 mT / 4378 Gs

Coating

[NiCuNi] Nickel

technical details »

0.701 ZŁ with VAT / pcs + price for transport

0.570 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

0.570 ZŁ

0.701 ZŁ

price from 875 pcs

0.513 ZŁ

0.631 ZŁ

price from 1750 pcs

0.502 ZŁ

0.617 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Not sure what to buy?

Call us now +48 888 99 98 98 if you prefer drop us a message by means of inquiry form through our site.
Strength along with structure of neodymium magnets can be checked on our our magnetic calculator.

Order by 14:00 and we’ll ship today!

Product card - MW 8x4 / N38 - cylindrical magnet

Specification / characteristics - MW 8x4 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010104
GTIN/EAN	5906301811039
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	8 mm [±0,1 mm]
Height	4 mm [±0,1 mm]
Weight	1.51 g
Magnetization Direction	↑ axial
Load capacity ~ ?	2.04 kg / 20.00 N
Magnetic Induction ~ ?	437.78 mT / 4378 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 8x4 / 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 modeling of the assembly - data

Presented information represent the result of a engineering calculation. Values were calculated on models for the class Nd₂Fe₁₄B. Actual parameters may deviate from the simulation results. Use these calculations as a preliminary roadmap during assembly planning.

Table 1: Static force (pull vs distance) - power drop
MW 8x4 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	4374 Gs 437.4 mT	2.04 kg / 4.50 LBS 2040.0 g / 20.0 N	strong
1 mm	3338 Gs 333.8 mT	1.19 kg / 2.62 LBS 1187.8 g / 11.7 N	low risk
2 mm	2386 Gs 238.6 mT	0.61 kg / 1.34 LBS 607.0 g / 6.0 N	low risk
3 mm	1663 Gs 166.3 mT	0.29 kg / 0.65 LBS 294.9 g / 2.9 N	low risk
5 mm	824 Gs 82.4 mT	0.07 kg / 0.16 LBS 72.4 g / 0.7 N	low risk
10 mm	205 Gs 20.5 mT	0.00 kg / 0.01 LBS 4.5 g / 0.0 N	low risk
15 mm	76 Gs 7.6 mT	0.00 kg / 0.00 LBS 0.6 g / 0.0 N	low risk
20 mm	36 Gs 3.6 mT	0.00 kg / 0.00 LBS 0.1 g / 0.0 N	low risk
30 mm	12 Gs 1.2 mT	0.00 kg / 0.00 LBS 0.0 g / 0.0 N	low risk
50 mm	3 Gs 0.3 mT	0.00 kg / 0.00 LBS 0.0 g / 0.0 N	low risk

Grip strength weakens drastically with every mm of distance. Keep in mind that even the smallest gap (e.g., dirt, varnish, veneer) significantly weakens the grip. Neodymiums operate strongest at the point of direct contact; distance drastically cuts the force. Notice how quickly the parameters plummet, when the product does not adhere tightly to the metal substrate. When designing the mounting, eliminate unnecessary gaps.

Table 2: Slippage hold (vertical surface)
MW 8x4 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.41 kg / 0.90 LBS 408.0 g / 4.0 N
1 mm	Stal (~0.2)	0.24 kg / 0.52 LBS 238.0 g / 2.3 N
2 mm	Stal (~0.2)	0.12 kg / 0.27 LBS 122.0 g / 1.2 N
3 mm	Stal (~0.2)	0.06 kg / 0.13 LBS 58.0 g / 0.6 N
5 mm	Stal (~0.2)	0.01 kg / 0.03 LBS 14.0 g / 0.1 N
10 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N
15 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 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 calculates the approximate force sufficient to start the downward movement of the magnet downwards on a upright metal surface (considering typical friction). This parameter varies with the air gap between the magnet and the surface.

Table 3: Wall mounting (sliding) - vertical pull
MW 8x4 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.61 kg / 1.35 LBS 612.0 g / 6.0 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.41 kg / 0.90 LBS 408.0 g / 4.0 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.20 kg / 0.45 LBS 204.0 g / 2.0 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.02 kg / 2.25 LBS 1020.0 g / 10.0 N

When placing a holder on a upright surface (e.g., a board), it will maintain barely about 1/5 of nominal attraction strength. Gravity and a low friction coefficient influence the fact that magnets slide down faster than they pull off. Planning a hanger? Note that the shear force is noticeably lower than the maximum static pull force. On a slippery surface, the element will slip down under a much lighter weight. Using a rubber coating can significantly raise the stability.

Table 4: Material efficiency (substrate influence) - power losses
MW 8x4 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.20 kg / 0.45 LBS 204.0 g / 2.0 N
1 mm	25%	0.51 kg / 1.12 LBS 510.0 g / 5.0 N
2 mm	50%	1.02 kg / 2.25 LBS 1020.0 g / 10.0 N
3 mm	75%	1.53 kg / 3.37 LBS 1530.0 g / 15.0 N
5 mm	100%	2.04 kg / 4.50 LBS 2040.0 g / 20.0 N
10 mm	100%	2.04 kg / 4.50 LBS 2040.0 g / 20.0 N
11 mm	100%	2.04 kg / 4.50 LBS 2040.0 g / 20.0 N
12 mm	100%	2.04 kg / 4.50 LBS 2040.0 g / 20.0 N

A too thin steel is incapable of take in the full magnetic flux, which squanders power of the holder. Should you mount a strong magnet to a too thin substrate, the field will pass right through and the attraction force will be weaker. To squeeze the maximum of this neodymium's power, you require a sufficiently solid piece of metal. The saturation phenomenon causes that on thin elements (e.g., car bodies), the magnet holds weaker. We advise picking the steel thickness from these parameters.

Table 5: Working in heat (material behavior) - resistance threshold
MW 8x4 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	2.04 kg / 4.50 LBS 2040.0 g / 20.0 N	OK
40 °C	-2.2%	2.00 kg / 4.40 LBS 1995.1 g / 19.6 N	OK
60 °C	-4.4%	1.95 kg / 4.30 LBS 1950.2 g / 19.1 N
80 °C	-6.6%	1.91 kg / 4.20 LBS 1905.4 g / 18.7 N
100 °C	-28.8%	1.45 kg / 3.20 LBS 1452.5 g / 14.2 N

Classic neodymiums lose power above the temperature limit. Protect against heat – excessive heat can permanently damage this magnet. As the temperature rises, the neodymium's force briefly decreases. Refrain from using this magnet close to ovens higher than its operating temperature limit. Ignoring the limit will lead to destruction of magnetic properties.

*Engineering note: Thermal stability is determined by both grade, as well as the dimension ratios. Thin magnets (low permeance coefficient) are more susceptible to demagnetization at lower temperatures than taller cylinders. The danger warning in the table points to permanent field degradation for this specific geometry.

Table 6: Two magnets (repulsion) - forces in the system
MW 8x4 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Strength (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	5.93 kg / 13.07 LBS 5 531 Gs	0.89 kg / 1.96 LBS 889 g / 8.7 N	N/A
1 mm	4.63 kg / 10.21 LBS 7 730 Gs	0.69 kg / 1.53 LBS 694 g / 6.8 N	4.17 kg / 9.18 LBS ~0 Gs
2 mm	3.45 kg / 7.61 LBS 6 675 Gs	0.52 kg / 1.14 LBS 518 g / 5.1 N	3.11 kg / 6.85 LBS ~0 Gs
3 mm	2.49 kg / 5.50 LBS 5 674 Gs	0.37 kg / 0.82 LBS 374 g / 3.7 N	2.25 kg / 4.95 LBS ~0 Gs
5 mm	1.23 kg / 2.72 LBS 3 989 Gs	0.18 kg / 0.41 LBS 185 g / 1.8 N	1.11 kg / 2.45 LBS ~0 Gs
10 mm	0.21 kg / 0.46 LBS 1 648 Gs	0.03 kg / 0.07 LBS 32 g / 0.3 N	0.19 kg / 0.42 LBS ~0 Gs
20 mm	0.01 kg / 0.03 LBS 410 Gs	0.00 kg / 0.00 LBS 2 g / 0.0 N	0.01 kg / 0.03 LBS ~0 Gs
50 mm	0.00 kg / 0.00 LBS 39 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
60 mm	0.00 kg / 0.00 LBS 24 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 15 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 11 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 8 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 6 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 much further distance than a magnet and steel combination. The connection of two magnets creates a more powerful interaction and a larger range of operation. Designing a strong closure? Apply two magnets instead of a neodymium and a striker plate. Be careful that when bringing together two magnets, the impact force is extreme. The levitation is slightly lower than the connection force, but still significant.
*Flux density for N-N configuration reaches ~0 Gs in the exact middle of the gap (due to field cancellation).
* Figures refer to sliding force of a pair of matching neodymium magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Safety (HSE) (implants) - warnings
MW 8x4 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	4.5 cm
Hearing aid	10 Gs (1.0 mT)	3.5 cm
Timepiece	20 Gs (2.0 mT)	2.5 cm
Phone / Smartphone	40 Gs (4.0 mT)	2.0 cm
Car key	50 Gs (5.0 mT)	2.0 cm
Payment card	400 Gs (40.0 mT)	1.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

Powerful magnet radiation is a serious hazard to electronic devices as well as pacemakers. These neodymiums generate a field that destroys function of digital equipment. Remember: the invisible magnetic field penetrates the body and housings. Special caution must be exercised by people with hearing aids and insulin pumps. Influence will be felt by: mechanical watches, car keys, speakers, and displays. Do not place the magnet near cards, hard drives, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - warning
MW 8x4 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	37.12 km/h (10.31 m/s)	0.08 J
30 mm	64.21 km/h (17.83 m/s)	0.24 J
50 mm	82.89 km/h (23.02 m/s)	0.40 J
100 mm	117.22 km/h (32.56 m/s)	0.80 J

NdFeB products are delicate – a collision with steel causes immediate chipping. Control the attraction moment – a neodymium left loose speeds with massive force. Striking energy can trigger coating fragments or injury to skin. Hold the magnet firmly during mounting so it doesn't slam with momentum against the steel surface. A collision at high speed ends with a crack of the magnet. Wear safety glasses when handling with powerful specimens.

Table 9: Corrosion resistance
MW 8x4 / N38

Technical parameter	Value / Description
Coating type	[NiCuNi] Nickel
Layer structure	Nickel - Copper - Nickel
Layer thickness	10-20 µm
Salt spray test (SST) ?	24 h
Recommended environment	Indoors only (dry)

For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Electrical data (P_c)
MW 8x4 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	2 233 Mx	22.3 µWb
P_c Coefficient	0.59	Low (Flat)

Flux value emitted by the magnet pole. Essential parameter in coil applications and motors. P_c value determines the working geometry.

Table 11: Underwater work (magnet fishing)
MW 8x4 / N38

Environment	Effective steel pull	Effect
Air (land)	2.04 kg	Standard
Water (riverbed)	2.34 kg (+0.30 kg buoyancy gain)	+14.5%

Rust risk: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.

Water displaces steel, making heavy objects slightly lighter. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Vertical hold

*Caution: On a vertical surface, the magnet retains only ~20% of its perpendicular strength.

2. Plate thickness effect

*Thin metal sheet (e.g. 0.5mm PC case) severely weakens the holding force.

3. Heat tolerance

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

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.59

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 and environmental data

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%

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: 010104-2026

Measurement Calculator

Magnet pull force

Kilograms (kg)

Force (N)

lbs

Magnetic Field

Induction (Gs)

Induction (T)

Type your figure in one of the inputs, and all other values will update on the fly.

See more proposals

Product available Ships tomorrow

SM 25x400 [2xM8] / N42 - magnetic separator

1131.60 ZŁ brutto / pcs

Product available Ships tomorrow

MW 12x1.5 / N38 - cylindrical magnet

0.431 ZŁ brutto / pcs

Product available Ships tomorrow

MPL 30x15x2 / N38 - lamellar magnet

3.89 ZŁ brutto / pcs

Product available Ships tomorrow

SMZR 32x150 / N52 - magnetic separator with handle

492.00 ZŁ brutto / pcs

The offered product is an exceptionally strong rod magnet, composed of advanced NdFeB material, which, at dimensions of Ø8x4 mm, guarantees optimal power. This specific item boasts high dimensional repeatability and professional build quality, making it a perfect solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 2.04 kg), this product is in stock from our warehouse in Poland, ensuring rapid order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.

It finds application in DIY projects, advanced automation, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power of 20.00 N with a weight of only 1.51 g, this rod is indispensable in miniature devices and wherever every gram matters.

Due to the delicate structure of the ceramic sinter, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure stability in industry, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.

Grade N38 is the most frequently chosen standard for industrial neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need even stronger magnets in the same volume (Ø8x4), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.

This model is characterized by dimensions Ø8x4 mm, which, at a weight of 1.51 g, makes it an element with impressive magnetic energy density. The value of 20.00 N means that the magnet is capable of holding a weight many times exceeding its own mass of 1.51 g. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.

This cylinder is magnetized axially (along the height of 4 mm), which means that the N and S poles are located on the flat, circular surfaces. 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 through the diameter if your project requires it.

Advantages and disadvantages of neodymium magnets.

Strengths

In addition to their long-term stability, neodymium magnets provide the following advantages:

They virtually do not lose power, because even after ten years the performance loss is only ~1% (according to literature),
Neodymium magnets prove to be exceptionally resistant to loss of magnetic properties caused by external magnetic fields,
By applying a smooth layer of gold, the element gains an proper look,
Neodymium magnets ensure maximum magnetic induction on a small surface, which allows for strong attraction,
Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
Possibility of custom creating as well as adapting to specific conditions,
Significant place in modern technologies – they serve a role in data components, electromotive mechanisms, medical equipment, as well as multitasking production systems.
Thanks to their power density, small magnets offer high operating force, in miniature format,

Weaknesses

Disadvantages of neodymium magnets:

At strong impacts they can crack, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
We suggest cover - magnetic mount, due to difficulties in realizing threads inside the magnet and complex shapes.
Possible danger resulting from small fragments of magnets can be dangerous, if swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, small elements of these products can be problematic in diagnostics medical when they are in the body.
Due to neodymium price, their price is relatively high,

Lifting parameters

Maximum magnetic pulling force – what it depends on?

The specified lifting capacity refers to the limit force, obtained under ideal test conditions, meaning:

using a base made of high-permeability steel, serving as a ideal flux conductor
whose thickness is min. 10 mm
with a plane free of scratches
without any air gap between the magnet and steel
for force acting at a right angle (in the magnet axis)
at conditions approx. 20°C

Impact of factors on magnetic holding capacity in practice

Please note that the magnet holding may be lower influenced by the following factors, in order of importance:

Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
Loading method – declared lifting capacity refers to detachment vertically. When slipping, the magnet holds much less (often approx. 20-30% of nominal force).
Plate thickness – too thin plate does not accept the full field, causing part of the flux to be lost to the other side.
Material composition – different alloys reacts the same. Alloy additives worsen the interaction with the magnet.
Smoothness – full contact is possible only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
Temperature – heating the magnet results in weakening of induction. Check the thermal limit for a given model.

Lifting capacity was measured with the use of a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, however under parallel forces the holding force is lower. In addition, even a minimal clearance between the magnet and the plate decreases the holding force.

Warnings

Mechanical processing

Mechanical processing of neodymium magnets carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Fragile material

Watch out for shards. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. Wear goggles.

Serious injuries

Danger of trauma: The pulling power is so great that it can cause hematomas, crushing, and broken bones. Protective gloves are recommended.

Heat warning

Regular neodymium magnets (grade N) lose power when the temperature exceeds 80°C. Damage is permanent.

Data carriers

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

Sensitization to coating

Some people have a contact allergy to Ni, which is the common plating for neodymium magnets. Prolonged contact may cause dermatitis. We suggest wear protective gloves.

Respect the power

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

Swallowing risk

Always store magnets out of reach of children. Risk of swallowing is significant, and the consequences of magnets connecting inside the body are fatal.

Compass and GPS

A powerful magnetic field disrupts the functioning of compasses in phones and navigation systems. Maintain magnets close to a smartphone to prevent damaging the sensors.

ICD Warning

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

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

MW 8x4 / N38 - cylindrical magnet

Product card - MW 8x4 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the assembly - data

Table 1: Static force (pull vs distance) - power drop MW 8x4 / N38

Table 2: Slippage hold (vertical surface) MW 8x4 / N38

Table 3: Wall mounting (sliding) - vertical pull MW 8x4 / N38

Table 4: Material efficiency (substrate influence) - power losses MW 8x4 / N38

Table 5: Working in heat (material behavior) - resistance threshold MW 8x4 / N38

Table 6: Two magnets (repulsion) - forces in the system MW 8x4 / N38

Table 7: Safety (HSE) (implants) - warnings MW 8x4 / N38

Table 8: Collisions (kinetic energy) - warning MW 8x4 / N38

Table 9: Corrosion resistance MW 8x4 / N38

Table 10: Electrical data (Pc) MW 8x4 / N38

Table 11: Underwater work (magnet fishing) MW 8x4 / N38

1. Vertical hold

2. Plate thickness effect

3. Heat tolerance

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

Material specification

Environmental data

Magnet pull force

Magnetic Field

See more proposals

SM 25x400 [2xM8] / N42 - magnetic separator

MW 12x1.5 / N38 - cylindrical magnet

MPL 30x15x2 / N38 - lamellar magnet

SMZR 32x150 / N52 - magnetic separator with handle

Advantages and disadvantages of neodymium magnets.

Strengths

Weaknesses

Lifting parameters

Maximum magnetic pulling force – what it depends on?

Impact of factors on magnetic holding capacity in practice

Warnings

Mechanical processing

Fragile material

Serious injuries

Heat warning

Data carriers

Sensitization to coating

Respect the power

Swallowing risk

Compass and GPS

ICD Warning

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs distance) - power drop
MW 8x4 / N38

Table 2: Slippage hold (vertical surface)
MW 8x4 / N38

Table 3: Wall mounting (sliding) - vertical pull
MW 8x4 / N38

Table 4: Material efficiency (substrate influence) - power losses
MW 8x4 / N38

Table 5: Working in heat (material behavior) - resistance threshold
MW 8x4 / N38

Table 6: Two magnets (repulsion) - forces in the system
MW 8x4 / N38

Table 7: Safety (HSE) (implants) - warnings
MW 8x4 / N38

Table 8: Collisions (kinetic energy) - warning
MW 8x4 / N38

Table 9: Corrosion resistance
MW 8x4 / N38

Table 10: Electrical data (P_c)
MW 8x4 / N38

Table 11: Underwater work (magnet fishing)
MW 8x4 / N38