Product available Ships today (order by 14:00)

MW 12x4 / 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 010019

GTIN/EAN: 5906301810186

5.00

Diameter Ø

12 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

3.39 g

Magnetization Direction

↑ axial

Load capacity

3.45 kg / 33.81 N

Magnetic Induction

343.64 mT / 3436 Gs

Coating

[NiCuNi] Nickel

product parameters »

1.353 ZŁ with VAT / pcs + price for transport

1.100 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

1.100 ZŁ

1.353 ZŁ

price from 1120 pcs

0.990 ZŁ

1.218 ZŁ

price from 4480 pcs

0.968 ZŁ

1.191 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Not sure where to buy?

Give us a call +48 22 499 98 98 alternatively get in touch through request form our website.
Lifting power along with form of magnets can be estimated using our magnetic mass calculator.

Order by 14:00 and we’ll ship today!

Technical specification of the product - MW 12x4 / N38 - cylindrical magnet

Specification / characteristics - MW 12x4 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010019
GTIN/EAN	5906301810186
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	12 mm [±0,1 mm]
Height	4 mm [±0,1 mm]
Weight	3.39 g
Magnetization Direction	↑ axial
Load capacity ~ ?	3.45 kg / 33.81 N
Magnetic Induction ~ ?	343.64 mT / 3436 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 12x4 / 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 analysis of the assembly - report

Presented data represent the outcome of a engineering analysis. Values rely on models for the material Nd₂Fe₁₄B. Real-world conditions may deviate from the simulation results. Use these calculations as a reference point when designing systems.

Table 1: Static pull force (pull vs gap) - power drop
MW 12x4 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	3435 Gs 343.5 mT	3.45 kg / 7.61 pounds 3450.0 g / 33.8 N	medium risk
1 mm	2950 Gs 295.0 mT	2.54 kg / 5.61 pounds 2544.7 g / 25.0 N	medium risk
2 mm	2423 Gs 242.3 mT	1.72 kg / 3.79 pounds 1717.5 g / 16.8 N	low risk
3 mm	1935 Gs 193.5 mT	1.09 kg / 2.41 pounds 1094.6 g / 10.7 N	low risk
5 mm	1190 Gs 119.0 mT	0.41 kg / 0.91 pounds 413.8 g / 4.1 N	low risk
10 mm	382 Gs 38.2 mT	0.04 kg / 0.09 pounds 42.7 g / 0.4 N	low risk
15 mm	156 Gs 15.6 mT	0.01 kg / 0.02 pounds 7.1 g / 0.1 N	low risk
20 mm	76 Gs 7.6 mT	0.00 kg / 0.00 pounds 1.7 g / 0.0 N	low risk
30 mm	26 Gs 2.6 mT	0.00 kg / 0.00 pounds 0.2 g / 0.0 N	low risk
50 mm	6 Gs 0.6 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	low risk

Magnetic force decreases significantly with every mm of gap. Note that even a very thin break (e.g., contamination, paint, rust) significantly reduces the pull force. Magnets operate strongest in perfect adhesion; gap nullifies the force. Observe how flashily the parameters fall, when the product does not adhere flatly to the metal substrate. When designing the mounting, avoid unnecessary gaps.

Table 2: Shear hold (vertical surface)
MW 12x4 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.69 kg / 1.52 pounds 690.0 g / 6.8 N
1 mm	Stal (~0.2)	0.51 kg / 1.12 pounds 508.0 g / 5.0 N
2 mm	Stal (~0.2)	0.34 kg / 0.76 pounds 344.0 g / 3.4 N
3 mm	Stal (~0.2)	0.22 kg / 0.48 pounds 218.0 g / 2.1 N
5 mm	Stal (~0.2)	0.08 kg / 0.18 pounds 82.0 g / 0.8 N
10 mm	Stal (~0.2)	0.01 kg / 0.02 pounds 8.0 g / 0.1 N
15 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 2.0 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

This section shows the theoretical weight limit sufficient to cause the slippage of the magnet downwards on a vertical steel plate (assuming standard friction). This value depends on the separation distance between the magnet and the metal.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 12x4 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.04 kg / 2.28 pounds 1035.0 g / 10.2 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.69 kg / 1.52 pounds 690.0 g / 6.8 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.35 kg / 0.76 pounds 345.0 g / 3.4 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.73 kg / 3.80 pounds 1725.0 g / 16.9 N

When placing a magnet on a upright wall (e.g., a board), it will only hold only about 1/5 of its nominal power. Gravity as well as a low friction coefficient mean that products slip easier than they detach. Planning a hanger? Consider that the sliding force is significantly lower than the perpendicular breakaway force. On a painted metal, the holder will slide down under a significantly smaller cargo. Utilizing a rubberized pad can effectively improve the result.

Table 4: Material efficiency (substrate influence) - power losses
MW 12x4 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.35 kg / 0.76 pounds 345.0 g / 3.4 N
1 mm	25%	0.86 kg / 1.90 pounds 862.5 g / 8.5 N
2 mm	50%	1.73 kg / 3.80 pounds 1725.0 g / 16.9 N
3 mm	75%	2.59 kg / 5.70 pounds 2587.5 g / 25.4 N
5 mm	100%	3.45 kg / 7.61 pounds 3450.0 g / 33.8 N
10 mm	100%	3.45 kg / 7.61 pounds 3450.0 g / 33.8 N
11 mm	100%	3.45 kg / 7.61 pounds 3450.0 g / 33.8 N
12 mm	100%	3.45 kg / 7.61 pounds 3450.0 g / 33.8 N

A too thin steel is not enough to conduct the entire magnetic field, which squanders power of the magnet. If you install a neodymium to a too thin substrate, the magnetism will penetrate right through and the attraction force will be weaker. To achieve the maximum of this magnet's power, you need a suitably thick element of steel. The saturation effect means that on sheet metal structures (e.g., car bodies), the holder works worse. We recommend selecting the steel thickness according to the table below.

Table 5: Working in heat (stability) - power drop
MW 12x4 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	3.45 kg / 7.61 pounds 3450.0 g / 33.8 N	OK
40 °C	-2.2%	3.37 kg / 7.44 pounds 3374.1 g / 33.1 N	OK
60 °C	-4.4%	3.30 kg / 7.27 pounds 3298.2 g / 32.4 N
80 °C	-6.6%	3.22 kg / 7.10 pounds 3222.3 g / 31.6 N
100 °C	-28.8%	2.46 kg / 5.42 pounds 2456.4 g / 24.1 N

Classic neodymiums lose power after exceeding the maximum temperature. Avoid high temperatures – high temperature can permanently damage this product. With every degree above norm, the neodymium's capacity briefly drops. Refrain from using this product close to heaters exceeding its safe range. Exceeding the critical threshold will result in permanent loss of magnetism.

*Engineering note: Thermal stability depends not only on the material grade, and the Permeance Coefficient Pc. Low-profile magnets (pancake types) risk losing magnetic properties at lower temperatures than taller cylinders. The danger warning in the table points to permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 12x4 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	8.23 kg / 18.13 pounds 4 952 Gs	1.23 kg / 2.72 pounds 1234 g / 12.1 N	N/A
1 mm	7.16 kg / 15.79 pounds 6 410 Gs	1.07 kg / 2.37 pounds 1074 g / 10.5 N	6.45 kg / 14.21 pounds ~0 Gs
2 mm	6.07 kg / 13.38 pounds 5 900 Gs	0.91 kg / 2.01 pounds 910 g / 8.9 N	5.46 kg / 12.04 pounds ~0 Gs
3 mm	5.03 kg / 11.09 pounds 5 372 Gs	0.75 kg / 1.66 pounds 754 g / 7.4 N	4.53 kg / 9.98 pounds ~0 Gs
5 mm	3.29 kg / 7.25 pounds 4 342 Gs	0.49 kg / 1.09 pounds 493 g / 4.8 N	2.96 kg / 6.52 pounds ~0 Gs
10 mm	0.99 kg / 2.18 pounds 2 379 Gs	0.15 kg / 0.33 pounds 148 g / 1.5 N	0.89 kg / 1.96 pounds ~0 Gs
20 mm	0.10 kg / 0.22 pounds 764 Gs	0.02 kg / 0.03 pounds 15 g / 0.1 N	0.09 kg / 0.20 pounds ~0 Gs
50 mm	0.00 kg / 0.00 pounds 85 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 52 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 34 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 23 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 17 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 12 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs

Two strong neodymiums attract each other from a wider radius than a magnet and sheet setup. The connection of two magnets creates a more powerful interaction and a larger range of action. Planning to create a strong closure? Use a pair of magnets instead of one magnet and a striker plate. Remember that when connecting a pair of magnets, the impact force is huge. The repulsion force is marginally weaker than the connection force, but still impressive.
*The magnetic induction for N-N configuration drops to ~0 Gs in the exact middle of the gap (due to field cancellation).
* Estimates show friction force of dual identical neodymium magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (implants) - precautionary measures
MW 12x4 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	5.5 cm
Hearing aid	10 Gs (1.0 mT)	4.5 cm
Timepiece	20 Gs (2.0 mT)	3.5 cm
Phone / Smartphone	40 Gs (4.0 mT)	3.0 cm
Car key	50 Gs (5.0 mT)	2.5 cm
Payment card	400 Gs (40.0 mT)	1.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

A strong magnetic field is a large risk to electronics and medical implants. These NdFeB products generate a field that prevents correct functioning of sensitive medical devices. Notice: the invisible magnetic field passes through tissues and housings. Exceptional care must be exercised by people with hearing aids and drug dispensers. The risk also applies to: automatic timepieces, car keys, speakers, and screens. Do not bring the product near payment cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - collision effects
MW 12x4 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	32.42 km/h (9.01 m/s)	0.14 J
30 mm	55.73 km/h (15.48 m/s)	0.41 J
50 mm	71.94 km/h (19.98 m/s)	0.68 J
100 mm	101.74 km/h (28.26 m/s)	1.35 J

NdFeB products are delicate – a collision with steel can result in shattering. Control the attraction moment – a magnet released freely becomes dangerous. Striking energy can destroy the magnet or injury to fingers. Be sure to control the product during bringing near metal so it doesn't slam with momentum against the metal. A contact at a velocity of dozens of km/h almost guarantees destruction of the magnet. Use safety goggles when playing with large magnets.

Table 9: Surface protection spec
MW 12x4 / 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. Note the thickness of the protective layer.

Table 10: Electrical data (P_c)
MW 12x4 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	4 114 Mx	41.1 µWb
P_c Coefficient	0.44	Low (Flat)

Total magnetic flux emitted by the magnet pole. Key data in coil applications as well as sensors. The P_c coefficient defines the working geometry.

Table 11: Underwater work (magnet fishing)
MW 12x4 / N38

Environment	Effective steel pull	Effect
Air (land)	3.45 kg	Standard
Water (riverbed)	3.95 kg (+0.50 kg buoyancy gain)	+14.5%

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. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Sliding resistance

*Warning: On a vertical wall, the magnet retains just approx. 20-30% of its max power.

2. Steel thickness impact

*Thin steel (e.g. 0.5mm PC case) significantly limits the holding force.

3. Temperature resistance

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

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.44

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%

Ecology and recycling (GPSR)

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: 010019-2026

Quick Unit Converter

Force (pull)

Force in kg

Newtons (N)

lbs

Magnetic Induction

Tesla (T)

Simply populate any input, to let the tool compute the rest for you.

Other products

Product available Ships today (order by 14:00)

UMP 75x25 [M10x3] GW F200 GOLD / N42 - search holder

150.00 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

MW 4x4 / N38 - cylindrical magnet

0.406 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

NCM 30x13.5x5 / N38 - channel magnetic holder

9.40 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

SM 32x250 [2xM8] / N42 - magnetic separator

750.30 ZŁ brutto / pcs

This product is an exceptionally strong cylinder magnet, made from advanced NdFeB material, which, with dimensions of Ø12x4 mm, guarantees maximum efficiency. This specific item is characterized by an accuracy of ±0.1mm and professional build quality, making it an ideal solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 3.45 kg), this product is in stock from our European logistics center, ensuring rapid order fulfillment. Moreover, its Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.

It successfully proves itself in modeling, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the pull force of 33.81 N with a weight of only 3.39 g, this cylindrical magnet is indispensable in electronics and wherever every gram matters.

Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 12.1 mm) using two-component epoxy glues. To ensure long-term durability in industry, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.

Magnets N38 are suitable for the majority of applications in automation and machine building, where excessive miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø12x4), 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 Ø12x4 mm, which, at a weight of 3.39 g, makes it an element with impressive magnetic energy density. The value of 33.81 N means that the magnet is capable of holding a weight many times exceeding its own mass of 3.39 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 12 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.

Advantages as well as disadvantages of rare earth magnets.

Strengths

Besides their remarkable strength, neodymium magnets offer the following advantages:

They virtually do not lose power, because even after ten years the performance loss is only ~1% (in laboratory conditions),
They possess excellent resistance to magnetism drop due to opposing magnetic fields,
A magnet with a shiny nickel surface has an effective appearance,
Magnetic induction on the top side of the magnet turns out to be strong,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
Thanks to the possibility of precise shaping and customization to individualized solutions, neodymium magnets can be produced in a wide range of shapes and sizes, which increases their versatility,
Versatile presence in innovative solutions – they serve a role in hard drives, electric motors, advanced medical instruments, also other advanced devices.
Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages

Problematic aspects of neodymium magnets: tips and applications.

Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a special holder, which not only protects them against impacts but also raises their durability
When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
They rust in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
We recommend a housing - magnetic holder, due to difficulties in realizing nuts inside the magnet and complex forms.
Possible danger to health – tiny shards of magnets are risky, if swallowed, which gains importance in the context of child safety. Furthermore, small components of these products can disrupt the diagnostic process medical after entering the body.
High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities

Holding force characteristics

Maximum lifting force for a neodymium magnet – what contributes to it?

The declared magnet strength represents the limit force, measured under laboratory conditions, meaning:

using a sheet made of low-carbon steel, serving as a magnetic yoke
with a thickness minimum 10 mm
with an ground contact surface
under conditions of ideal adhesion (metal-to-metal)
during detachment in a direction vertical to the plane
at standard ambient temperature

Determinants of practical lifting force of a magnet

In practice, the real power depends on many variables, presented from crucial:

Air gap (betwixt the magnet and the metal), as even a tiny distance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to paint, rust or debris).
Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the nominal value.
Element thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
Material composition – not every steel reacts the same. High carbon content weaken the interaction with the magnet.
Surface quality – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Roughness creates an air distance.
Heat – neodymium magnets have a negative temperature coefficient. When it is hot they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under shearing force the holding force is lower. In addition, even a minimal clearance between the magnet’s surface and the plate lowers the holding force.

H&S for magnets

Handling rules

Exercise caution. Rare earth magnets attract from a long distance and connect with huge force, often quicker than you can react.

GPS Danger

Be aware: rare earth magnets produce a field that confuses sensitive sensors. Keep a separation from your phone, device, and GPS.

Magnetic media

Powerful magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Keep a distance of min. 10 cm.

Danger to pacemakers

Medical warning: Strong magnets can turn off pacemakers and defibrillators. Stay away if you have medical devices.

Swallowing risk

Neodymium magnets are not toys. Eating multiple magnets may result in them attracting across intestines, which poses a direct threat to life and requires urgent medical intervention.

Serious injuries

Large magnets can crush fingers in a fraction of a second. Do not put your hand betwixt two attracting surfaces.

Mechanical processing

Mechanical processing of NdFeB material carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Nickel allergy

Medical facts indicate that the nickel plating (standard magnet coating) is a common allergen. If your skin reacts to metals, refrain from touching magnets with bare hands and select coated magnets.

Magnets are brittle

Watch out for shards. Magnets can fracture upon violent connection, ejecting sharp fragments into the air. Wear goggles.

Thermal limits

Regular neodymium magnets (grade N) lose magnetization when the temperature goes above 80°C. This process is irreversible.

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

MW 12x4 / N38 - cylindrical magnet

Technical specification of the product - MW 12x4 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical analysis of the assembly - report

Table 1: Static pull force (pull vs gap) - power drop MW 12x4 / N38

Table 2: Shear hold (vertical surface) MW 12x4 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces MW 12x4 / N38

Table 4: Material efficiency (substrate influence) - power losses MW 12x4 / N38

Table 5: Working in heat (stability) - power drop MW 12x4 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system MW 12x4 / N38

Table 7: Safety (HSE) (implants) - precautionary measures MW 12x4 / N38

Table 8: Dynamics (kinetic energy) - collision effects MW 12x4 / N38

Table 9: Surface protection spec MW 12x4 / N38

Table 10: Electrical data (Pc) MW 12x4 / N38

Table 11: Underwater work (magnet fishing) MW 12x4 / N38

1. Sliding resistance

2. Steel thickness impact

3. Temperature resistance

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

Material specification

Ecology and recycling (GPSR)

Force (pull)

Magnetic Induction

Other products

UMP 75x25 [M10x3] GW F200 GOLD / N42 - search holder

MW 4x4 / N38 - cylindrical magnet

NCM 30x13.5x5 / N38 - channel magnetic holder

SM 32x250 [2xM8] / N42 - magnetic separator

Advantages as well as disadvantages of rare earth magnets.

Strengths

Disadvantages

Holding force characteristics

Maximum lifting force for a neodymium magnet – what contributes to it?

Determinants of practical lifting force of a magnet

H&S for magnets

Handling rules

GPS Danger

Magnetic media

Danger to pacemakers

Swallowing risk

Serious injuries

Mechanical processing

Nickel allergy

Magnets are brittle

Thermal limits

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs gap) - power drop
MW 12x4 / N38

Table 2: Shear hold (vertical surface)
MW 12x4 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 12x4 / N38

Table 4: Material efficiency (substrate influence) - power losses
MW 12x4 / N38

Table 5: Working in heat (stability) - power drop
MW 12x4 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 12x4 / N38

Table 7: Safety (HSE) (implants) - precautionary measures
MW 12x4 / N38

Table 8: Dynamics (kinetic energy) - collision effects
MW 12x4 / N38

Table 9: Surface protection spec
MW 12x4 / N38

Table 10: Electrical data (P_c)
MW 12x4 / N38

Table 11: Underwater work (magnet fishing)
MW 12x4 / N38