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MW 4x4 / 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 010076

GTIN/EAN: 5906301810759

5.00

Diameter Ø

4 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

0.38 g

Magnetization Direction

↑ axial

Load capacity

0.51 kg / 4.96 N

Magnetic Induction

552.79 mT / 5528 Gs

Coating

[NiCuNi] Nickel

product parameters »

0.406 ZŁ with VAT / pcs + price for transport

0.330 ZŁ net + 23% VAT / pcs

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Technical details - MW 4x4 / N38 - cylindrical magnet

Specification / characteristics - MW 4x4 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010076
GTIN/EAN	5906301810759
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	4 mm [±0,1 mm]
Height	4 mm [±0,1 mm]
Weight	0.38 g
Magnetization Direction	↑ axial
Load capacity ~ ?	0.51 kg / 4.96 N
Magnetic Induction ~ ?	552.79 mT / 5528 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 4x4 / 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

Engineering simulation of the magnet - technical parameters

Presented values represent the direct effect of a mathematical simulation. Values were calculated on algorithms for the material Nd₂Fe₁₄B. Operational conditions may differ. Use these data as a reference point for designers.

Table 1: Static force (pull vs distance) - power drop
MW 4x4 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5517 Gs 551.7 mT	0.51 kg / 1.12 pounds 510.0 g / 5.0 N	low risk
1 mm	2984 Gs 298.4 mT	0.15 kg / 0.33 pounds 149.2 g / 1.5 N	low risk
2 mm	1498 Gs 149.8 mT	0.04 kg / 0.08 pounds 37.6 g / 0.4 N	low risk
3 mm	803 Gs 80.3 mT	0.01 kg / 0.02 pounds 10.8 g / 0.1 N	low risk
5 mm	296 Gs 29.6 mT	0.00 kg / 0.00 pounds 1.5 g / 0.0 N	low risk
10 mm	58 Gs 5.8 mT	0.00 kg / 0.00 pounds 0.1 g / 0.0 N	low risk
15 mm	20 Gs 2.0 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	low risk
20 mm	9 Gs 0.9 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	low risk
30 mm	3 Gs 0.3 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	low risk
50 mm	1 Gs 0.1 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	low risk

Pulling power decreases sharply per each millimeter of distance. Note that every additional insulation layer (e.g., contamination, varnish, dust) noticeably diminishes the holding power. Magnets hold most effectively at the point of direct contact; air break weakens the power. Analyze how quickly the parameters plummet, when the product does not adhere flatly to the steel surface. When planning the mounting, discard redundant distances.

Table 2: Sliding hold (wall)
MW 4x4 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.10 kg / 0.22 pounds 102.0 g / 1.0 N
1 mm	Stal (~0.2)	0.03 kg / 0.07 pounds 30.0 g / 0.3 N
2 mm	Stal (~0.2)	0.01 kg / 0.02 pounds 8.0 g / 0.1 N
3 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 2.0 g / 0.0 N
5 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
10 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
15 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

The following data presents the approximate holding capacity needed to initiate the shifting of the magnet downwards against a upright metal surface (considering typical friction coefficient). The holding force is relative to the gap size between the magnet and the metal.

Table 3: Vertical assembly (sliding) - vertical pull
MW 4x4 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.15 kg / 0.34 pounds 153.0 g / 1.5 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.10 kg / 0.22 pounds 102.0 g / 1.0 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.05 kg / 0.11 pounds 51.0 g / 0.5 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	0.26 kg / 0.56 pounds 255.0 g / 2.5 N

When placing a magnet on a vertical plane (e.g., a car body), it will maintain only about 1/5 of its nominal power. Gravity and a low friction coefficient cause that magnets slide down easier than they pop off the substrate. Designing a wall mount? Consider that the shear force is much weaker than the maximum static pull force. On a painted metal, the element will slide down under a much lighter weight. Application of an anti-slip pad can drastically increase the grip.

Table 4: Steel thickness (saturation) - sheet metal selection
MW 4x4 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.05 kg / 0.11 pounds 51.0 g / 0.5 N
1 mm	25%	0.13 kg / 0.28 pounds 127.5 g / 1.3 N
2 mm	50%	0.26 kg / 0.56 pounds 255.0 g / 2.5 N
3 mm	75%	0.38 kg / 0.84 pounds 382.5 g / 3.8 N
5 mm	100%	0.51 kg / 1.12 pounds 510.0 g / 5.0 N
10 mm	100%	0.51 kg / 1.12 pounds 510.0 g / 5.0 N
11 mm	100%	0.51 kg / 1.12 pounds 510.0 g / 5.0 N
12 mm	100%	0.51 kg / 1.12 pounds 510.0 g / 5.0 N

A thin metal plate cannot focus the full magnetic flux, which squanders power of the holder. Should you mount a strong magnet to a weak sheet, the flux will penetrate right through and the attraction force will be weaker. To squeeze full efficiency of this neodymium's potential, you need a suitably thick element of metal. The material oversaturation means that on thin elements (e.g., appliance housings), the holder holds weaker. We recommend selecting the steel dimension according to the table below.

Table 5: Thermal stability (material behavior) - power drop
MW 4x4 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	0.51 kg / 1.12 pounds 510.0 g / 5.0 N	OK
40 °C	-2.2%	0.50 kg / 1.10 pounds 498.8 g / 4.9 N	OK
60 °C	-4.4%	0.49 kg / 1.07 pounds 487.6 g / 4.8 N	OK
80 °C	-6.6%	0.48 kg / 1.05 pounds 476.3 g / 4.7 N
100 °C	-28.8%	0.36 kg / 0.80 pounds 363.1 g / 3.6 N

Standard neodymium magnets change their properties parameters after exceeding the maximum temperature. Protect against heat – heat can permanently demagnetize this magnet. With every degree above norm, the neodymium's force temporarily lowers. Do not use this magnet near heat sources exceeding its safe range. Too high temperature will lead to permanent loss of magnetism.

*Technical advisory: Temperature resistance is determined by both grade, but also on the magnet's shape. Thin magnets (low Pc) may lose charge permanently under lower heat stress than taller cylinders. Warning indicator in the table indicates a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 4x4 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	2.36 kg / 5.20 pounds 5 984 Gs	0.35 kg / 0.78 pounds 354 g / 3.5 N	N/A
1 mm	1.34 kg / 2.96 pounds 8 324 Gs	0.20 kg / 0.44 pounds 201 g / 2.0 N	1.21 kg / 2.66 pounds ~0 Gs
2 mm	0.69 kg / 1.52 pounds 5 968 Gs	0.10 kg / 0.23 pounds 103 g / 1.0 N	0.62 kg / 1.37 pounds ~0 Gs
3 mm	0.34 kg / 0.76 pounds 4 213 Gs	0.05 kg / 0.11 pounds 52 g / 0.5 N	0.31 kg / 0.68 pounds ~0 Gs
5 mm	0.09 kg / 0.20 pounds 2 169 Gs	0.01 kg / 0.03 pounds 14 g / 0.1 N	0.08 kg / 0.18 pounds ~0 Gs
10 mm	0.01 kg / 0.01 pounds 592 Gs	0.00 kg / 0.00 pounds 1 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
20 mm	0.00 kg / 0.00 pounds 116 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
50 mm	0.00 kg / 0.00 pounds 10 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
60 mm	0.00 kg / 0.00 pounds 6 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
70 mm	0.00 kg / 0.00 pounds 4 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
80 mm	0.00 kg / 0.00 pounds 3 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
90 mm	0.00 kg / 0.00 pounds 2 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
100 mm	0.00 kg / 0.00 pounds 1 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs

Two strong neodymiums interact from a wider radius than a neodymium and metal combination. The setup of magnet-to-magnet creates a more powerful interaction and a wider radius of performance. Designing a powerful holder? Utilize two neodymiums instead of one magnet and a striker plate. Be careful that when bringing together two magnets, the pinch force is huge. The repulsion force is a bit weaker than the connection force, but still large.
*Field value for N-N configuration drops to ~0 Gs in the exact middle between the magnets (resulting from vector opposition).
* Results refer to sliding force of dual same neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (implants) - precautionary measures
MW 4x4 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	3.0 cm
Hearing aid	10 Gs (1.0 mT)	2.0 cm
Mechanical watch	20 Gs (2.0 mT)	2.0 cm
Mobile device	40 Gs (4.0 mT)	1.5 cm
Car key	50 Gs (5.0 mT)	1.5 cm
Payment card	400 Gs (40.0 mT)	0.5 cm
HDD hard drive	600 Gs (60.0 mT)	0.5 cm

Powerful magnet radiation is a real danger to IT equipment as well as pacemakers. These magnets produce a field that disrupts operation of sensitive medical devices. Be aware: the invisible magnetic field passes through tissues and glass. Special caution must be taken by people with hearing aids and drug dispensers. Also at risk are: mechanical watches, car keys, membranes, and displays. Do not place the magnet near cards, hard drives, or precise measuring instruments.

Table 8: Impact energy (kinetic energy) - collision effects
MW 4x4 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	36.95 km/h (10.26 m/s)	0.02 J
30 mm	63.99 km/h (17.78 m/s)	0.06 J
50 mm	82.62 km/h (22.95 m/s)	0.10 J
100 mm	116.84 km/h (32.45 m/s)	0.20 J

Magnetic elements are very brittle – a violent impact against metal risks their cracking. Pay attention to connection velocity – a neodymium left loose turns into a projectile. Impact energy can trigger coating fragments or dangerous crushing to skin. Be sure to control the product during installation so it doesn't hit with great force against the steel surface. A collision at high speed means shattering of the neodymium. Wear safety glasses when playing with powerful specimens.

Table 9: Corrosion resistance
MW 4x4 / 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. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Electrical data (P_c)
MW 4x4 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	717 Mx	7.2 µWb
P_c Coefficient	0.89	High (Stable)

Total magnetic flux emitted by the pole surface. Essential parameter for generator designers and motors. The P_c coefficient determines the working geometry.

Table 11: Physics of underwater searching
MW 4x4 / N38

Environment	Effective steel pull	Effect
Air (land)	0.51 kg	Standard
Water (riverbed)	0.58 kg (+0.07 kg buoyancy gain)	+14.5%

Corrosion warning: 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. Buoyancy helps in lifting finds.

1. Sliding resistance

*Warning: On a vertical wall, the magnet holds only ~20% of its perpendicular strength.

2. Steel thickness impact

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

3. Heat tolerance

*For standard magnets, the safety limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.89

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

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: 010076-2026

Magnet Unit Converter

Force (pull)

Kilograms (kg)

Pounds (lbs)

Magnetic Induction

Induction (Gs)

Tesla (T)

Input your value in just one field to see the conversion for the other fields right away.

MP 30x6x10 / N38 - ring magnet

16.00 ZŁ brutto / pcs

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MW 10x4 / N38 - cylindrical magnet

1.021 ZŁ brutto / pcs

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UMT 12x20 green / N38 - board holder

1.894 ZŁ brutto / pcs

Product available Ships tomorrow

SM 32x500 [2xM8] / N42 - magnetic separator

1488.30 ZŁ brutto / pcs

This product is an incredibly powerful cylinder magnet, composed of advanced NdFeB material, which, at dimensions of Ø4x4 mm, guarantees maximum efficiency. The MW 4x4 / N38 model boasts a tolerance of ±0.1mm and industrial build quality, making it an ideal solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 0.51 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Furthermore, its Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.

It finds application in DIY projects, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 4.96 N with a weight of only 0.38 g, this rod is indispensable in miniature devices and wherever low weight is crucial.

Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 4.1 mm) using epoxy glues. To ensure stability in industry, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.

Magnets NdFeB grade N38 are strong enough for the majority of applications in modeling and machine building, where excessive miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø4x4), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.

The presented product is a neodymium magnet with precisely defined parameters: diameter 4 mm and height 4 mm. The value of 4.96 N means that the magnet is capable of holding a weight many times exceeding its own mass of 0.38 g. The product has a [NiCuNi] coating, which protects the surface 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 4 mm. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized through the diameter if your project requires it.

Strengths and weaknesses of rare earth magnets.

Pros

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

They retain attractive force for around 10 years – the drop is just ~1% (in theory),
Magnets perfectly protect themselves against loss of magnetization caused by external fields,
The use of an elegant coating of noble metals (nickel, gold, silver) causes the element to have aesthetics,
Neodymium magnets deliver maximum magnetic induction on a small surface, which allows for strong attraction,
Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
Considering the option of free shaping and customization to individualized requirements, NdFeB magnets can be manufactured in a wide range of geometric configurations, which increases their versatility,
Wide application in future technologies – they are used in computer drives, brushless drives, diagnostic systems, as well as modern systems.
Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Limitations

Disadvantages of NdFeB magnets:

At very strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
NdFeB magnets demagnetize 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 immune to moisture, when using outdoors
Due to limitations in realizing nuts and complicated forms in magnets, we recommend using a housing - magnetic mount.
Potential hazard related to microscopic parts of magnets pose a threat, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these devices are able to complicate diagnosis medical in case of swallowing.
Due to neodymium price, their price is relatively high,

Lifting parameters

Highest magnetic holding force – what contributes to it?

The lifting capacity listed is a theoretical maximum value conducted under standard conditions:

using a sheet made of low-carbon steel, functioning as a ideal flux conductor
whose thickness equals approx. 10 mm
characterized by smoothness
with direct contact (without coatings)
under axial application of breakaway force (90-degree angle)
at temperature room level

Magnet lifting force in use – key factors

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

Distance – existence of any layer (rust, dirt, air) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
Direction of force – maximum parameter is reached only during perpendicular pulling. The resistance to sliding of the magnet along the surface is usually many times lower (approx. 1/5 of the lifting capacity).
Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
Steel type – mild steel gives the best results. Alloy steels decrease magnetic properties and lifting capacity.
Surface structure – the more even the surface, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
Temperature – heating the magnet causes a temporary drop of force. Check the thermal limit for a given model.

Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under perpendicular forces, in contrast under attempts to slide the magnet the holding force is lower. Moreover, even a slight gap between the magnet’s surface and the plate lowers the holding force.

Precautions when working with neodymium magnets

Warning for allergy sufferers

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If redness appears, cease handling magnets and wear gloves.

Protect data

Data protection: Neodymium magnets can ruin payment cards and sensitive devices (heart implants, hearing aids, mechanical watches).

Magnets are brittle

Despite metallic appearance, neodymium is brittle and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Serious injuries

Pinching hazard: The attraction force is so great that it can result in blood blisters, pinching, and broken bones. Protective gloves are recommended.

Compass and GPS

An intense magnetic field negatively affects the operation of magnetometers in smartphones and GPS navigation. Maintain magnets near a smartphone to avoid damaging the sensors.

Life threat

For implant holders: Strong magnetic fields affect medical devices. Maintain at least 30 cm distance or request help to work with the magnets.

Heat warning

Watch the temperature. Exposing the magnet to high heat will permanently weaken its magnetic structure and strength.

Danger to the youngest

Strictly keep magnets out of reach of children. Choking hazard is high, and the effects of magnets connecting inside the body are very dangerous.

Combustion hazard

Drilling and cutting of neodymium magnets poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Do not underestimate power

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

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

MW 4x4 / N38 - cylindrical magnet

Technical details - MW 4x4 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering simulation of the magnet - technical parameters

Table 1: Static force (pull vs distance) - power drop MW 4x4 / N38

Table 2: Sliding hold (wall) MW 4x4 / N38

Table 3: Vertical assembly (sliding) - vertical pull MW 4x4 / N38

Table 4: Steel thickness (saturation) - sheet metal selection MW 4x4 / N38

Table 5: Thermal stability (material behavior) - power drop MW 4x4 / N38

Table 6: Magnet-Magnet interaction (attraction) - field range MW 4x4 / N38

Table 7: Safety (HSE) (implants) - precautionary measures MW 4x4 / N38

Table 8: Impact energy (kinetic energy) - collision effects MW 4x4 / N38

Table 9: Corrosion resistance MW 4x4 / N38

Table 10: Electrical data (Pc) MW 4x4 / N38

Table 11: Physics of underwater searching MW 4x4 / N38

1. Sliding resistance

2. Steel thickness impact

3. Heat tolerance

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

Material specification

Environmental data

Force (pull)

Magnetic Induction

See also deals

MP 30x6x10 / N38 - ring magnet

MW 10x4 / N38 - cylindrical magnet

UMT 12x20 green / N38 - board holder

SM 32x500 [2xM8] / N42 - magnetic separator

Strengths and weaknesses of rare earth magnets.

Pros

Limitations

Lifting parameters

Highest magnetic holding force – what contributes to it?

Magnet lifting force in use – key factors

Precautions when working with neodymium magnets

Warning for allergy sufferers

Protect data

Magnets are brittle

Serious injuries

Compass and GPS

Life threat

Heat warning

Danger to the youngest

Combustion hazard

Do not underestimate power

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs distance) - power drop
MW 4x4 / N38

Table 2: Sliding hold (wall)
MW 4x4 / N38

Table 3: Vertical assembly (sliding) - vertical pull
MW 4x4 / N38

Table 4: Steel thickness (saturation) - sheet metal selection
MW 4x4 / N38

Table 5: Thermal stability (material behavior) - power drop
MW 4x4 / N38

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 4x4 / N38

Table 7: Safety (HSE) (implants) - precautionary measures
MW 4x4 / N38

Table 8: Impact energy (kinetic energy) - collision effects
MW 4x4 / N38

Table 9: Corrosion resistance
MW 4x4 / N38

Table 10: Electrical data (P_c)
MW 4x4 / N38

Table 11: Physics of underwater searching
MW 4x4 / N38