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MW 12x50 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010020

GTIN: 5906301810193

5.00

Diameter Ø

12 mm [±0,1 mm]

Height

50 mm [±0,1 mm]

Weight

42.41 g

Magnetization Direction

↑ axial

Load capacity

2.62 kg / 25.73 N

Magnetic Induction

614.94 mT / 6149 Gs

Coating

[NiCuNi] Nickel

28.29 ZŁ with VAT / pcs + price for transport

23.00 ZŁ net + 23% VAT / pcs

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MW 12x50 / N38 - cylindrical magnet

Specification / characteristics MW 12x50 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010020
GTIN	5906301810193
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	50 mm [±0,1 mm]
Weight	42.41 g
Magnetization Direction	↑ axial
Load capacity ~ ?	2.62 kg / 25.73 N
Magnetic Induction ~ ?	614.94 mT / 6149 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 12x50 / N38 - cylindrical magnet

properties	values	units
remenance Br [Min. - Max.] ?	12.2-12.6	kGs
remenance Br [Min. - Max.] ?	1220-1260	T
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 106	°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 product - report

The following values are the outcome of a physical calculation. Values were calculated on algorithms for the class NdFeB. Real-world conditions may differ. Please consider these data as a reference point for designers.

Table 1: Static pull force (pull vs distance) - interaction chart
MW 12x50 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	6146 Gs 614.6 mT	2.62 kg / 2620.0 g 25.7 N	strong
1 mm	5138 Gs 513.8 mT	1.83 kg / 1831.5 g 18.0 N	safe
2 mm	4199 Gs 419.9 mT	1.22 kg / 1222.9 g 12.0 N	safe
3 mm	3388 Gs 338.8 mT	0.80 kg / 796.3 g 7.8 N	safe
5 mm	2194 Gs 219.4 mT	0.33 kg / 334.0 g 3.3 N	safe
10 mm	853 Gs 85.3 mT	0.05 kg / 50.4 g 0.5 N	safe
15 mm	417 Gs 41.7 mT	0.01 kg / 12.1 g 0.1 N	safe
20 mm	239 Gs 23.9 mT	0.00 kg / 4.0 g 0.0 N	safe
30 mm	103 Gs 10.3 mT	0.00 kg / 0.7 g 0.0 N	safe
50 mm	33 Gs 3.3 mT	0.00 kg / 0.1 g 0.0 N	safe

Magnetic force decreases significantly with every mm of gap. Keep in mind that even a very thin break (e.g., contamination, paint, rust) significantly reduces the pull force. Magnetic products operate most effectively at the point of direct contact; distance nullifies the power. See how flashily the parameters plummet, when the magnet does not touch directly to the metal substrate. When planning the assembly, avoid unnecessary gaps.

Table 2: Slippage Load (Vertical Surface)
MW 12x50 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	0.52 kg / 524.0 g 5.1 N
1 mm	Stal (~0.2)	0.37 kg / 366.0 g 3.6 N
2 mm	Stal (~0.2)	0.24 kg / 244.0 g 2.4 N
3 mm	Stal (~0.2)	0.16 kg / 160.0 g 1.6 N
5 mm	Stal (~0.2)	0.07 kg / 66.0 g 0.6 N
10 mm	Stal (~0.2)	0.01 kg / 10.0 g 0.1 N
15 mm	Stal (~0.2)	0.00 kg / 2.0 g 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N

This section indicates the estimated force required to start the slippage of the magnet down against a upright steel plate (considering typical friction). The holding force varies with the distance between the magnet and the surface.

Table 3: Wall mounting (shearing) - vertical pull
MW 12x50 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.79 kg / 786.0 g 7.7 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.52 kg / 524.0 g 5.1 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.26 kg / 262.0 g 2.6 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.31 kg / 1310.0 g 12.9 N

When placing a element on a vertical surface (e.g., a board), it will maintain only about 1/5 of its nominal power. Gravitational force and a weak degree of grip mean that magnets move down easier than they pull off. Want to create a wall mount? Note that the shear force is much weaker than the maximum static pull force. On a smooth steel, the element will give way down under a noticeably lighter weight. Application of an anti-slip layer can drastically increase the grip.

Table 4: Steel thickness (substrate influence) - power losses
MW 12x50 / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	10%	0.26 kg / 262.0 g 2.6 N
1 mm	25%	0.66 kg / 655.0 g 6.4 N
2 mm	50%	1.31 kg / 1310.0 g 12.9 N
5 mm	100%	2.62 kg / 2620.0 g 25.7 N
10 mm	100%	2.62 kg / 2620.0 g 25.7 N

A thin metal plate cannot conduct the full magnetic flux, which squanders power of the holder. Should you attach a powerful product to a weak sheet, the magnetism will pass right through and the pull force will drop sharply. To squeeze the maximum of this neodymium's potential, you need a suitably thick piece of steel. The saturation phenomenon causes that on sheet metal structures (e.g., car bodies), the product works worse. We suggest choosing the steel thickness from these parameters.

Table 5: Thermal stability (material behavior) - thermal limit
MW 12x50 / N38

Ambient temp. (°C)	Power loss	Remaining pull	Status
20 °C	0.0%	2.62 kg / 2620.0 g 25.7 N	OK
40 °C	-2.2%	2.56 kg / 2562.4 g 25.1 N	OK
60 °C	-4.4%	2.50 kg / 2504.7 g 24.6 N	OK
80 °C	-6.6%	2.45 kg / 2447.1 g 24.0 N
100 °C	-28.8%	1.87 kg / 1865.4 g 18.3 N

Standard neodymium magnets irreversibly lose strength above the temperature limit. Protect against heat – high temperature can irreversibly damage this magnet. With every degree above norm, the magnet's capacity briefly decreases. Refrain from using this magnet near heat sources exceeding its working range. Ignoring the limit will result in destruction of magnetic properties.

*Important note: Heat tolerance depends not only on the material grade, and the Permeance Coefficient Pc. Flat magnets (pancake types) are more susceptible to demagnetization sooner than long magnets. Warning indicator in the table signals permanent field degradation for this specific geometry.

Table 6: Two magnets (repulsion) - forces in the system
MW 12x50 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	2.63 kg / 2629 g 25.8 N 12 312 Gs	N/A
1 mm	1.83 kg / 1832 g 18.0 N 11 284 Gs	1.65 kg / 1648 g 16.2 N ~0 Gs
2 mm	1.22 kg / 1223 g 12.0 N 10 277 Gs	1.10 kg / 1101 g 10.8 N ~0 Gs
3 mm	0.80 kg / 796 g 7.8 N 9 309 Gs	0.72 kg / 717 g 7.0 N ~0 Gs
5 mm	0.33 kg / 334 g 3.3 N 7 551 Gs	0.30 kg / 301 g 2.9 N ~0 Gs
10 mm	0.05 kg / 50 g 0.5 N 4 389 Gs	0.05 kg / 45 g 0.4 N ~0 Gs
20 mm	0.00 kg / 4 g 0.0 N 1 706 Gs	0.00 kg / 0 g 0.0 N ~0 Gs
50 mm	0.00 kg / 0 g 0.0 N 303 Gs	0.00 kg / 0 g 0.0 N ~0 Gs

Two magnets interact from a much further distance than a magnet and steel combination. Such a system of magnet-to-magnet generates a stronger field and a further horizon of operation. Planning to create a solid fastener? Apply two magnets instead of one magnet and a steel. Remember that when attracting two neodymiums, the pinch force is massive. The levitation is marginally weaker than the connection force, but still significant.
*Flux density between like poles drops to ~0 Gs at the geometric center of the gap (caused by magnetic field nullification).

Table 7: Hazards (electronics) - precautionary measures
MW 12x50 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	11.0 cm
Hearing aid	10 Gs (1.0 mT)	8.5 cm
Mechanical watch	20 Gs (2.0 mT)	6.5 cm
Mobile device	40 Gs (4.0 mT)	5.0 cm
Remote	50 Gs (5.0 mT)	4.5 cm
Payment card	400 Gs (40.0 mT)	2.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.5 cm

Extremely neodym field poses a serious hazard to electronic devices and medical implants. These NdFeB products produce a field that destroys function of digital equipment. Notice: the unseen radiation penetrates the body and plastic. Special caution must be exercised by people with hearing aids and drug dispensers. Also at risk are: mechanical watches, car keys, membranes, and displays. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (cracking risk) - collision effects
MW 12x50 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	8.02 km/h (2.23 m/s)	0.11 J
30 mm	13.73 km/h (3.81 m/s)	0.31 J
50 mm	17.73 km/h (4.92 m/s)	0.51 J
100 mm	25.07 km/h (6.96 m/s)	1.03 J

Neodymium magnets 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. Be sure to control the product during mounting so it doesn't slam with momentum against the metal. A collision at high speed means shattering of the neodymium. Wear safety glasses when handling with large magnets.

Table 9: Surface protection spec
MW 12x50 / 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. Note the thickness of the protective layer.

Table 10: Electrical data (Flux)
MW 12x50 / N38

Parameter	Value	Jedn. SI / Opis
Strumień (Flux)	8 230 Mx	82.3 µWb
Współczynnik Pc	1.49	Wysoki (Stabilny)

Total magnetic flux emitted by the magnet pole. Key data for generator builders and Hall effect devices. Pc Factor defines the magnet operating point.

Table 11: Submerged application
MW 12x50 / N38

Environment	Effective steel pull	Effect
Air (land)	2.62 kg	Standard
Water (riverbed)	3.00 kg (+0.38 kg Buoyancy gain)	+14.5%

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

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

Measurement Calculator

Force (Pull)

Kilograms (kg)

Force (N)

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Magnetic Induction

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MPL 20x20x20 / N38 - lamellar magnet

33.21 ZŁ brutto / pcs

The offered product is an extremely powerful cylinder magnet, made from modern NdFeB material, which, at dimensions of Ø12x50 mm, guarantees the highest energy density. This specific item features high dimensional repeatability and professional build quality, making it an ideal solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 2.62 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring lightning-fast order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.

This model is ideal for building generators, advanced Hall effect sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the high power of 25.73 N with a weight of only 42.41 g, this cylindrical magnet is indispensable in electronics and wherever low weight is crucial.

Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 12.1 mm) using epoxy glues. To ensure long-term durability in automation, anaerobic resins are used, which are safe for nickel 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 (Ø12x50), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.

The presented product is a neodymium magnet with precisely defined parameters: diameter 12 mm and height 50 mm. The key parameter here is the holding force amounting to approximately 2.62 kg (force ~25.73 N), which, with such defined dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which secures it against oxidation, 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. 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 diametrically if your project requires it.

Advantages as well as disadvantages of neodymium magnets.

Besides their immense pulling force, neodymium magnets offer the following advantages:

They have stable power, and over nearly ten years their attraction force decreases symbolically – ~1% (in testing),
They retain their magnetic properties even under close interference source,
Thanks to the metallic finish, the plating of Ni-Cu-Ni, gold-plated, or silver-plated gives an clean appearance,
Neodymium magnets deliver maximum magnetic induction on a small area, which allows for strong attraction,
Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling operation at temperatures reaching 230°C and above...
Thanks to modularity in shaping and the ability to customize to unusual requirements,
Huge importance in high-tech industry – they are utilized in HDD drives, electric motors, diagnostic systems, and modern systems.
Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Problematic aspects of neodymium magnets: application proposals

To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
We recommend casing - magnetic mount, due to difficulties in realizing threads inside the magnet and complex forms.
Health risk related to microscopic parts of magnets pose a threat, in case of ingestion, which gains importance in the context of child health protection. It is also worth noting that tiny parts of these devices can disrupt the diagnostic process medical in case of swallowing.
High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities

Maximum holding power of the magnet – what it depends on?

The declared magnet strength refers to the maximum value, obtained under optimal environment, specifically:

on a plate made of structural steel, optimally conducting the magnetic flux
with a thickness minimum 10 mm
with an polished contact surface
with zero gap (without paint)
under perpendicular force vector (90-degree angle)
in temp. approx. 20°C

Magnet lifting force in use – key factors

During everyday use, the actual lifting capacity results from several key aspects, ranked from crucial:

Clearance – the presence of foreign body (rust, tape, gap) acts as an insulator, which reduces power rapidly (even by 50% at 0.5 mm).
Pull-off angle – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
Material type – the best choice is pure iron steel. Cast iron may generate lower lifting capacity.
Plate texture – ground elements guarantee perfect abutment, which improves field saturation. Uneven metal reduce efficiency.
Heat – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).

* Lifting capacity was determined using a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular pulling force, however under attempts to slide the magnet the load capacity is reduced by as much as fivefold. Additionally, even a slight gap {between} the magnet and the plate lowers the load capacity.

H&S for magnets

Adults only

Adult use only. Tiny parts pose a choking risk, causing severe trauma. Keep away from children and animals.

Crushing risk

Risk of injury: The attraction force is so great that it can result in blood blisters, crushing, and broken bones. Use thick gloves.

Safe operation

Handle with care. Rare earth magnets attract from a long distance and snap with huge force, often quicker than you can move away.

Impact on smartphones

Note: rare earth magnets produce a field that disrupts precision electronics. Maintain a safe distance from your phone, device, and navigation systems.

Medical implants

People with a heart stimulator must maintain an large gap from magnets. The magnetic field can stop the functioning of the life-saving device.

Power loss in heat

Avoid heat. Neodymium magnets are susceptible to heat. If you need operation above 80°C, look for HT versions (H, SH, UH).

Beware of splinters

Despite metallic appearance, the material is delicate and cannot withstand shocks. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Magnetic media

Equipment safety: Strong magnets can ruin payment cards and sensitive devices (heart implants, medical aids, timepieces).

Allergic reactions

Studies show that nickel (the usual finish) is a strong allergen. If you have an allergy, refrain from direct skin contact and choose versions in plastic housing.

Do not drill into magnets

Fire warning: Rare earth powder is explosive. Do not process magnets in home conditions as this risks ignition.

Security!

Details about risks in the article: Magnet Safety Guide.

MW 12x50 / N38 - cylindrical magnet

MW 12x50 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering simulation of the product - report

Force (Pull)

Magnetic Induction

Other offers

MW 8x1.5 / N38 - cylindrical magnet

SM 25x325 [2xM8] / N42 - magnetic separator

UI 45x13x6 [C321] / N38 - badge holder

MPL 20x20x20 / N38 - lamellar magnet

Advantages as well as disadvantages of neodymium magnets.

Maximum holding power of the magnet – what it depends on?

Magnet lifting force in use – key factors

H&S for magnets

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C