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MW 12x4 / N52 - cylindrical magnet

cylindrical magnet

Catalog no 010500

GTIN/EAN: 5906301814962

5.00

Diameter Ø

12 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

3.39 g

Magnetization Direction

↑ axial

Load capacity

4.68 kg / 45.89 N

Magnetic Induction

400.45 mT / 4005 Gs

Coating

[NiCuNi] Nickel

2.18 with VAT / pcs + price for transport

1.770 ZŁ net + 23% VAT / pcs

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Product card - MW 12x4 / N52 - cylindrical magnet

Specification / characteristics - MW 12x4 / N52 - cylindrical magnet

properties
properties values
Cat. no. 010500
GTIN/EAN 5906301814962
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 ~ ? 4.68 kg / 45.89 N
Magnetic Induction ~ ? 400.45 mT / 4005 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N52

Specification / characteristics MW 12x4 / N52 - cylindrical magnet
properties values units
remenance Br [min. - max.] ? 14.2-14.7 kGs
remenance Br [min. - max.] ? 1420-1470 mT
coercivity bHc ? 10.8-12.5 kOe
coercivity bHc ? 860-995 kA/m
actual internal force iHc ≥ 12 kOe
actual internal force iHc ≥ 955 kA/m
energy density [min. - max.] ? 48-53 BH max MGOe
energy density [min. - max.] ? 380-422 BH max KJ/m
max. temperature ? ≤ 80 °C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°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

Technical modeling of the assembly - report

These information are the result of a physical calculation. Results are based on models for the material Nd2Fe14B. Actual conditions may differ from theoretical values. Please consider these calculations as a reference point for designers.

Table 1: Static force (pull vs distance) - interaction chart
MW 12x4 / N52

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4003 Gs
400.3 mT
4.68 kg / 10.32 LBS
4680.0 g / 45.9 N
strong
1 mm 3438 Gs
343.8 mT
3.45 kg / 7.61 LBS
3451.9 g / 33.9 N
strong
2 mm 2824 Gs
282.4 mT
2.33 kg / 5.14 LBS
2329.8 g / 22.9 N
strong
3 mm 2255 Gs
225.5 mT
1.48 kg / 3.27 LBS
1484.8 g / 14.6 N
safe
5 mm 1386 Gs
138.6 mT
0.56 kg / 1.24 LBS
561.3 g / 5.5 N
safe
10 mm 445 Gs
44.5 mT
0.06 kg / 0.13 LBS
58.0 g / 0.6 N
safe
15 mm 181 Gs
18.1 mT
0.01 kg / 0.02 LBS
9.6 g / 0.1 N
safe
20 mm 89 Gs
8.9 mT
0.00 kg / 0.01 LBS
2.3 g / 0.0 N
safe
30 mm 30 Gs
3.0 mT
0.00 kg / 0.00 LBS
0.3 g / 0.0 N
safe
50 mm 7 Gs
0.7 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe

Table 2: Slippage capacity (vertical surface)
MW 12x4 / N52

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.94 kg / 2.06 LBS
936.0 g / 9.2 N
1 mm Stal (~0.2) 0.69 kg / 1.52 LBS
690.0 g / 6.8 N
2 mm Stal (~0.2) 0.47 kg / 1.03 LBS
466.0 g / 4.6 N
3 mm Stal (~0.2) 0.30 kg / 0.65 LBS
296.0 g / 2.9 N
5 mm Stal (~0.2) 0.11 kg / 0.25 LBS
112.0 g / 1.1 N
10 mm Stal (~0.2) 0.01 kg / 0.03 LBS
12.0 g / 0.1 N
15 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 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

Table 3: Wall mounting (shearing) - vertical pull
MW 12x4 / N52

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
1.40 kg / 3.10 LBS
1404.0 g / 13.8 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.94 kg / 2.06 LBS
936.0 g / 9.2 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.47 kg / 1.03 LBS
468.0 g / 4.6 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
2.34 kg / 5.16 LBS
2340.0 g / 23.0 N

Table 4: Steel thickness (substrate influence) - power losses
MW 12x4 / N52

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.47 kg / 1.03 LBS
468.0 g / 4.6 N
1 mm
25%
1.17 kg / 2.58 LBS
1170.0 g / 11.5 N
2 mm
50%
2.34 kg / 5.16 LBS
2340.0 g / 23.0 N
3 mm
75%
3.51 kg / 7.74 LBS
3510.0 g / 34.4 N
5 mm
100%
4.68 kg / 10.32 LBS
4680.0 g / 45.9 N
10 mm
100%
4.68 kg / 10.32 LBS
4680.0 g / 45.9 N
11 mm
100%
4.68 kg / 10.32 LBS
4680.0 g / 45.9 N
12 mm
100%
4.68 kg / 10.32 LBS
4680.0 g / 45.9 N

Table 5: Thermal stability (material behavior) - resistance threshold
MW 12x4 / N52

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 4.68 kg / 10.32 LBS
4680.0 g / 45.9 N
OK
40 °C -2.2% 4.58 kg / 10.09 LBS
4577.0 g / 44.9 N
OK
60 °C -4.4% 4.47 kg / 9.86 LBS
4474.1 g / 43.9 N
80 °C -6.6% 4.37 kg / 9.64 LBS
4371.1 g / 42.9 N
100 °C -28.8% 3.33 kg / 7.35 LBS
3332.2 g / 32.7 N

Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 12x4 / N52

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 11.17 kg / 24.63 LBS
5 771 Gs
1.68 kg / 3.69 LBS
1676 g / 16.4 N
N/A
1 mm 9.73 kg / 21.44 LBS
7 470 Gs
1.46 kg / 3.22 LBS
1459 g / 14.3 N
8.75 kg / 19.30 LBS
~0 Gs
2 mm 8.24 kg / 18.16 LBS
6 875 Gs
1.24 kg / 2.72 LBS
1236 g / 12.1 N
7.42 kg / 16.35 LBS
~0 Gs
3 mm 6.83 kg / 15.06 LBS
6 260 Gs
1.02 kg / 2.26 LBS
1024 g / 10.1 N
6.15 kg / 13.55 LBS
~0 Gs
5 mm 4.46 kg / 9.84 LBS
5 060 Gs
0.67 kg / 1.48 LBS
670 g / 6.6 N
4.02 kg / 8.86 LBS
~0 Gs
10 mm 1.34 kg / 2.95 LBS
2 772 Gs
0.20 kg / 0.44 LBS
201 g / 2.0 N
1.21 kg / 2.66 LBS
~0 Gs
20 mm 0.14 kg / 0.30 LBS
891 Gs
0.02 kg / 0.05 LBS
21 g / 0.2 N
0.12 kg / 0.27 LBS
~0 Gs
50 mm 0.00 kg / 0.00 LBS
99 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
61 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
40 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
27 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
20 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
15 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs

Table 7: Protective zones (implants) - precautionary measures
MW 12x4 / N52

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 6.0 cm
Hearing aid 10 Gs (1.0 mT) 4.5 cm
Mechanical watch 20 Gs (2.0 mT) 3.5 cm
Mobile device 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) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Dynamics (cracking risk) - collision effects
MW 12x4 / N52

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 37.76 km/h
(10.49 m/s)
0.19 J
30 mm 64.91 km/h
(18.03 m/s)
0.55 J
50 mm 83.79 km/h
(23.27 m/s)
0.92 J
100 mm 118.50 km/h
(32.92 m/s)
1.84 J

Table 9: Corrosion resistance
MW 12x4 / N52

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)

Table 10: Electrical data (Flux)
MW 12x4 / N52

Parameter Value SI Unit / Description
Magnetic Flux 4 794 Mx 47.9 µWb
Pc Coefficient 0.44 Low (Flat)

Table 11: Underwater work (magnet fishing)
MW 12x4 / N52

Environment Effective steel pull Effect
Air (land) 4.68 kg Standard
Water (riverbed) 5.36 kg
(+0.68 kg buoyancy gain)
+14.5%
Corrosion warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Vertical hold

*Warning: On a vertical surface, the magnet holds only a fraction of its nominal pull.

2. Plate thickness effect

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

3. Power loss vs temp

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

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

chart generated for the permeance coefficient Pc (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 Pc (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 Pc 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.

Engineering data and GPSR
Chemical composition
iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%
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: 010500-2026
Magnet Unit Converter
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The presented product is an exceptionally strong rod magnet, made from durable NdFeB material, which, at dimensions of Ø12x4 mm, guarantees the highest energy density. The MW 12x4 / N52 model is characterized by 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. 4.68 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It successfully proves itself in DIY projects, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power of 45.89 N with a weight of only 3.39 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a tolerance of ±0.1mm, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 12.1 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 N38 are suitable for the majority of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø12x4), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 12 mm and height 4 mm. The value of 45.89 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 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.

Pros and cons of Nd2Fe14B magnets.

Strengths

Apart from their superior magnetic energy, neodymium magnets have these key benefits:
  • They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
  • Magnets perfectly defend themselves against loss of magnetization caused by external fields,
  • Thanks to the elegant finish, the surface of nickel, gold, or silver-plated gives an clean appearance,
  • Magnets are distinguished by huge magnetic induction on the surface,
  • 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...
  • Possibility of exact creating as well as adjusting to defined applications,
  • Versatile presence in innovative solutions – they are commonly used in data components, electric drive systems, medical devices, also industrial machines.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages

Disadvantages of NdFeB magnets:
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a strong case, which not only secures them against impacts but also increases their durability
  • We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • They rust in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • We suggest a housing - magnetic holder, due to difficulties in creating nuts inside the magnet and complex forms.
  • Potential hazard related to microscopic parts of magnets are risky, in case of ingestion, which becomes key in the context of child safety. Additionally, small elements of these products are able to complicate diagnosis medical in case of swallowing.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Lifting parameters

Optimal lifting capacity of a neodymium magnetwhat affects it?

Information about lifting capacity is the result of a measurement for the most favorable conditions, assuming:
  • using a plate made of low-carbon steel, functioning as a ideal flux conductor
  • with a cross-section of at least 10 mm
  • characterized by smoothness
  • with zero gap (no impurities)
  • for force applied at a right angle (in the magnet axis)
  • at conditions approx. 20°C

Determinants of lifting force in real conditions

Bear in mind that the working load may be lower influenced by elements below, starting with the most relevant:
  • Distance – existence of foreign body (rust, tape, air) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
  • Metal type – not every steel attracts identically. High carbon content weaken the attraction effect.
  • Surface finish – ideal contact is obtained only on polished steel. Rough texture create air cushions, weakening the magnet.
  • Thermal factor – hot environment reduces pulling force. Too high temperature can permanently damage the magnet.

Holding force was checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under parallel forces the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate lowers the holding force.

Warnings
Maximum temperature

Do not overheat. Neodymium magnets are sensitive to heat. If you require operation above 80°C, look for special high-temperature series (H, SH, UH).

Choking Hazard

Always keep magnets out of reach of children. Choking hazard is significant, and the effects of magnets clamping inside the body are fatal.

Bodily injuries

Mind your fingers. Two powerful magnets will snap together instantly with a force of massive weight, crushing everything in their path. Exercise extreme caution!

Implant safety

Warning for patients: Powerful magnets affect medical devices. Keep at least 30 cm distance or ask another person to handle the magnets.

Nickel allergy

Certain individuals experience a hypersensitivity to Ni, which is the common plating for neodymium magnets. Extended handling can result in a rash. It is best to wear protective gloves.

Do not drill into magnets

Drilling and cutting of NdFeB material poses a fire hazard. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Immense force

Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.

Magnetic media

Do not bring magnets close to a wallet, laptop, or TV. The magnetism can permanently damage these devices and erase data from cards.

Material brittleness

Neodymium magnets are ceramic materials, which means they are fragile like glass. Clashing of two magnets will cause them shattering into shards.

Precision electronics

Remember: neodymium magnets produce a field that confuses sensitive sensors. Keep a safe distance from your phone, tablet, and GPS.

Attention! Looking for details? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98