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MW 15x2 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010028

GTIN/EAN: 5906301810278

5.00

Diameter Ø

15 mm [±0,1 mm]

Height

2 mm [±0,1 mm]

Weight

2.65 g

Magnetization Direction

↑ axial

Load capacity

1.51 kg / 14.84 N

Magnetic Induction

159.70 mT / 1597 Gs

Coating

[NiCuNi] Nickel

product specifications »

1.218 ZŁ with VAT / pcs + price for transport

0.990 ZŁ net + 23% VAT / pcs

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Technical - MW 15x2 / N38 - cylindrical magnet

Specification / characteristics - MW 15x2 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010028
GTIN/EAN 5906301810278
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 15 mm [±0,1 mm]
Height 2 mm [±0,1 mm]
Weight 2.65 g
Magnetization Direction ↑ axial
Load capacity ~ ? 1.51 kg / 14.84 N
Magnetic Induction ~ ? 159.70 mT / 1597 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 15x2 / 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

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 modeling of the product - data

Presented information are the result of a engineering calculation. Values were calculated on models for the class Nd2Fe14B. Operational conditions might slightly deviate from the simulation results. Use these calculations as a preliminary roadmap when designing systems.

Table 1: Static pull force (force vs gap) - power drop
MW 15x2 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1597 Gs
159.7 mT
 1.51 kg / 3.33 lbs
1510.0 g / 14.8 N
 weak grip
1 mm 1483 Gs
148.3 mT
 1.30 kg / 2.87 lbs
1303.0 g / 12.8 N
 weak grip
2 mm 1320 Gs
132.0 mT
 1.03 kg / 2.28 lbs
1032.2 g / 10.1 N
 weak grip
3 mm 1137 Gs
113.7 mT
 0.77 kg / 1.69 lbs
765.0 g / 7.5 N
 weak grip
5 mm 791 Gs
79.1 mT
 0.37 kg / 0.82 lbs
370.8 g / 3.6 N
 weak grip
10 mm 298 Gs
29.8 mT
 0.05 kg / 0.12 lbs
52.5 g / 0.5 N
 weak grip
15 mm 127 Gs
12.7 mT
 0.01 kg / 0.02 lbs
9.6 g / 0.1 N
 weak grip
20 mm 63 Gs
6.3 mT
 0.00 kg / 0.01 lbs
2.4 g / 0.0 N
 weak grip
30 mm 22 Gs
2.2 mT
 0.00 kg / 0.00 lbs
0.3 g / 0.0 N
 weak grip
50 mm 5 Gs
0.5 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 weak grip
Grip strength drops drastically with every subsequent millimeter of gap. Keep in mind that even a microscopic distance (e.g., dirt, varnish, dust) significantly weakens the grip. Neodymiums operate strongest in perfect adhesion; gap drastically cuts the force. See how flashily the pull force plummet, when the magnet does not adhere directly to the steel surface. When calculating the assembly, eliminate unnecessary gaps.

Table 2: Vertical force (vertical surface)
MW 15x2 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.30 kg / 0.67 lbs
302.0 g / 3.0 N
1 mm Stal (~0.2) 0.26 kg / 0.57 lbs
260.0 g / 2.6 N
2 mm Stal (~0.2) 0.21 kg / 0.45 lbs
206.0 g / 2.0 N
3 mm Stal (~0.2) 0.15 kg / 0.34 lbs
154.0 g / 1.5 N
5 mm Stal (~0.2) 0.07 kg / 0.16 lbs
74.0 g / 0.7 N
10 mm Stal (~0.2) 0.01 kg / 0.02 lbs
10.0 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
The following data defines the approximate shear load required to initiate the downward movement of the magnet downwards against a vertical metal surface (considering typical friction). This parameter is relative to the gap size between the magnet and the surface.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MW 15x2 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.45 kg / 1.00 lbs
453.0 g / 4.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.30 kg / 0.67 lbs
302.0 g / 3.0 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.15 kg / 0.33 lbs
151.0 g / 1.5 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.76 kg / 1.66 lbs
755.0 g / 7.4 N
When hanging a magnet on a upright wall (e.g., a car body), it will only hold barely about 20%-30% of its maximum pull force. Gravitational force and a low friction coefficient cause that holders slide down faster than they pop off the substrate. Want to create a hanger? Note that the shear force is much weaker than the perpendicular breakaway force. On a smooth steel, the magnet will slip down under a much lighter load. Application of an anti-slip pad can effectively raise the stability.

Table 4: Material efficiency (saturation) - sheet metal selection
MW 15x2 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.15 kg / 0.33 lbs
151.0 g / 1.5 N
1 mm
25%
 0.38 kg / 0.83 lbs
377.5 g / 3.7 N
2 mm
50%
 0.76 kg / 1.66 lbs
755.0 g / 7.4 N
3 mm
75%
 1.13 kg / 2.50 lbs
1132.5 g / 11.1 N
5 mm
100%
 1.51 kg / 3.33 lbs
1510.0 g / 14.8 N
10 mm
100%
 1.51 kg / 3.33 lbs
1510.0 g / 14.8 N
11 mm
100%
 1.51 kg / 3.33 lbs
1510.0 g / 14.8 N
12 mm
100%
 1.51 kg / 3.33 lbs
1510.0 g / 14.8 N
A too thin steel is unable to take in the entire magnetic field, which weakens actual performance of the holder. Should you install a neodymium to a weak sheet, the magnetism will pass right through and the attraction force will be weaker. To utilize 100% of this magnet's potential, you need a suitably thick backing of metal. The material oversaturation means that on thin elements (e.g., car bodies), the holder shows lower pull force. We recommend selecting the steel thickness according to the table below.

Table 5: Working in heat (stability) - resistance threshold
MW 15x2 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 1.51 kg / 3.33 lbs
1510.0 g / 14.8 N
 OK
40 °C -2.2% 1.48 kg / 3.26 lbs
1476.8 g / 14.5 N
 OK
60 °C -4.4% 1.44 kg / 3.18 lbs
1443.6 g / 14.2 N
80 °C -6.6% 1.41 kg / 3.11 lbs
1410.3 g / 13.8 N
100 °C -28.8% 1.08 kg / 2.37 lbs
1075.1 g / 10.5 N
Ordinary NdFeB products lose parameters past the thermal threshold. Watch out for overheating – high temperature can permanently destroy this product. With every degree above norm, the magnet's power briefly lowers. Do not use this magnet close to heaters exceeding its safe range. Too high temperature will result in destruction of magnetism.
*Important note: Heat tolerance is determined by both grade, and the Permeance Coefficient Pc. Thin magnets (pancake types) are more susceptible to demagnetization under lower heat stress than taller cylinders. The danger warning in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (attraction) - field collision
MW 15x2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 2.78 kg / 6.12 lbs
2 915 Gs
0.42 kg / 0.92 lbs
417 g / 4.1 N
 N/A
1 mm 2.61 kg / 5.76 lbs
3 096 Gs
0.39 kg / 0.86 lbs
392 g / 3.8 N
 2.35 kg / 5.18 lbs
~0 Gs
2 mm 2.40 kg / 5.28 lbs
2 966 Gs
0.36 kg / 0.79 lbs
360 g / 3.5 N
 2.16 kg / 4.76 lbs
~0 Gs
3 mm 2.15 kg / 4.75 lbs
2 812 Gs
0.32 kg / 0.71 lbs
323 g / 3.2 N
 1.94 kg / 4.27 lbs
~0 Gs
5 mm 1.65 kg / 3.63 lbs
2 459 Gs
0.25 kg / 0.54 lbs
247 g / 2.4 N
 1.48 kg / 3.27 lbs
~0 Gs
10 mm 0.68 kg / 1.50 lbs
1 582 Gs
0.10 kg / 0.23 lbs
102 g / 1.0 N
 0.61 kg / 1.35 lbs
~0 Gs
20 mm 0.10 kg / 0.21 lbs
595 Gs
0.01 kg / 0.03 lbs
14 g / 0.1 N
 0.09 kg / 0.19 lbs
~0 Gs
50 mm 0.00 kg / 0.00 lbs
71 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
43 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
28 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
19 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
14 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
10 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
Two magnetic products attract each other from a wider radius than a neodymium and metal setup. The connection of two magnets generates a stronger field and a larger range of performance. Planning to create a powerful holder? Use a pair of magnets instead of one magnet and a striker plate. Be careful that when connecting a pair of magnets, the impact force is massive. The levitation is a bit weaker than the attraction, but still significant.
*The magnetic induction for N-N configuration reaches ~0 Gs in the exact middle of the gap (caused by magnetic field nullification).
* Results demonstrate sliding force of dual matching neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (electronics) - warnings
MW 15x2 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 5.5 cm
Hearing aid 10 Gs (1.0 mT) 4.0 cm
Timepiece 20 Gs (2.0 mT) 3.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.5 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
Extremely neodym field poses a large risk to electronics and medical implants. These magnets generate a field that prevents correct functioning of sensitive medical devices. Be aware: the invisible magnetic field acts through matter and glass. Special caution must be exercised by people with cochlear implants and insulin pumps. Also at risk are: automatic timepieces, car keys, speakers, and displays. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (cracking risk) - warning
MW 15x2 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 24.59 km/h
(6.83 m/s)
 0.06 J
30 mm 41.70 km/h
(11.58 m/s)
 0.18 J
50 mm 53.83 km/h
(14.95 m/s)
 0.30 J
100 mm 76.13 km/h
(21.15 m/s)
 0.59 J
NdFeB products are prone to chipping – a strong collision with metal can result in shattering. Watch the impact speed – a neodymium left loose turns into a projectile. Striking energy can cause material chips or painful pinches to fingers. Be sure to control the product during mounting so it doesn't slam with momentum against the metal. A contact at a velocity of dozens of km/h means shattering of the neodymium. Wear safety glasses when handling with powerful specimens.

Table 9: Anti-corrosion coating durability
MW 15x2 / 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 SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Note the thickness of the protective layer.

Table 10: Construction data (Flux)
MW 15x2 / N38

Parameter Value SI Unit / Description
Magnetic Flux 3 541 Mx 35.4 µWb
Pc Coefficient 0.20 Low (Flat)
Flux value passing through the magnet pole. Essential parameter for generator designers and motors. The Pc coefficient determines the magnet's operating point.

Table 11: Submerged application
MW 15x2 / N38

Environment Effective steel pull Effect
Air (land) 1.51 kg Standard
Water (riverbed) 1.73 kg
(+0.22 kg buoyancy gain)
+14.5%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
The magnetic field penetrates through water without any losses. Buoyancy helps in lifting finds.
1. Sliding resistance

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

2. Steel saturation

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

3. Heat tolerance

*For N38 grade, the max working temp is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.20

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 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.

Technical specification and ecology
Elemental analysis
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%
Sustainability
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: 010028-2026
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The presented product is an extremely powerful rod magnet, produced from durable NdFeB material, which, with dimensions of Ø15x2 mm, guarantees maximum efficiency. The MW 15x2 / N38 component features high dimensional repeatability and professional build quality, making it a perfect solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 1.51 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Furthermore, its 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 modeling, advanced automation, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 14.84 N with a weight of only 2.65 g, this rod is indispensable in electronics and wherever low weight is crucial.
Since our magnets have a tolerance of ±0.1mm, the best method is to glue them into holes with a slightly larger diameter (e.g., 15.1 mm) using epoxy glues. To ensure stability in industry, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most popular standard for professional neodymium magnets, offering an optimal price-to-power ratio and operational stability. If you need even stronger magnets in the same volume (Ø15x2), 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 15 mm and height 2 mm. The value of 14.84 N means that the magnet is capable of holding a weight many times exceeding its own mass of 2.65 g. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 2 mm), which means that the N and S poles are located on the flat, circular surfaces. Such an arrangement is standard 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 as well as disadvantages of rare earth magnets.

Strengths

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (according to literature),
  • They are noted for resistance to demagnetization induced by external field influence,
  • By covering with a smooth layer of nickel, the element gains an nice look,
  • They are known for high magnetic induction at the operating surface, which increases their power,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Possibility of exact machining as well as optimizing to atypical applications,
  • Significant place in high-tech industry – they are commonly used in mass storage devices, electromotive mechanisms, medical equipment, and modern systems.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

What to avoid - cons of neodymium magnets: tips and applications.
  • To avoid cracks under impact, we recommend using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
  • Neodymium magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (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 advise using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
  • Limited possibility of making threads in the magnet and complicated forms - recommended is casing - mounting mechanism.
  • Possible danger to health – tiny shards of magnets are risky, in case of ingestion, which gains importance in the aspect of protecting the youngest. It is also worth noting that small components of these devices can be problematic in diagnostics 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

Holding force characteristics

Highest magnetic holding force – what it depends on?

The declared magnet strength represents the maximum value, obtained under ideal test conditions, namely:
  • using a base made of mild steel, functioning as a ideal flux conductor
  • possessing a massiveness of at least 10 mm to avoid saturation
  • with an polished contact surface
  • with zero gap (without paint)
  • during pulling in a direction perpendicular to the plane
  • at ambient temperature room level

Practical lifting capacity: influencing factors

Effective lifting capacity impacted by specific conditions, including (from most important):
  • Distance (betwixt the magnet and the plate), as even a microscopic distance (e.g. 0.5 mm) leads to a decrease in force by up to 50% (this also applies to paint, corrosion or dirt).
  • Force direction – catalog parameter refers to detachment vertically. When attempting to slide, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
  • Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
  • Chemical composition of the base – mild steel attracts best. Alloy steels decrease magnetic properties and lifting capacity.
  • Surface structure – the more even the surface, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
  • Temperature influence – high temperature weakens pulling force. Too high temperature can permanently demagnetize the magnet.

Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under shearing force the load capacity is reduced by as much as fivefold. Additionally, even a slight gap between the magnet and the plate decreases the load capacity.

Precautions when working with NdFeB magnets
Pinching danger

Mind your fingers. Two powerful magnets will join immediately with a force of massive weight, crushing anything in their path. Exercise extreme caution!

Magnetic interference

Note: rare earth magnets produce a field that interferes with precision electronics. Keep a safe distance from your phone, tablet, and GPS.

Skin irritation risks

A percentage of the population experience a hypersensitivity to nickel, which is the common plating for NdFeB magnets. Frequent touching might lead to a rash. We strongly advise wear safety gloves.

Handling guide

Before starting, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Think ahead.

Swallowing risk

Adult use only. Tiny parts pose a choking risk, leading to severe trauma. Keep out of reach of children and animals.

Combustion hazard

Combustion risk: Neodymium dust is highly flammable. Avoid machining magnets in home conditions as this may cause fire.

Threat to electronics

Do not bring magnets near a wallet, computer, or TV. The magnetism can permanently damage these devices and wipe information from cards.

Heat sensitivity

Standard neodymium magnets (N-type) lose power when the temperature goes above 80°C. Damage is permanent.

Beware of splinters

Beware of splinters. Magnets can fracture upon violent connection, ejecting shards into the air. We recommend safety glasses.

Warning for heart patients

Patients with a ICD should maintain an large gap from magnets. The magnetic field can interfere with the operation of the life-saving device.

Important! Want to know more? Read our article: Why are neodymium magnets dangerous?