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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

check parameters »

1.218 ZŁ with VAT / pcs + price for transport

0.990 ZŁ net + 23% VAT / pcs

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Product card - 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

Technical analysis of the product - technical parameters

The following values constitute the direct effect of a physical analysis. Values were calculated on algorithms for the class Nd2Fe14B. Operational parameters might slightly differ. Use these data as a reference point during assembly planning.

Table 1: Static force (force vs gap) - characteristics
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
 safe
1 mm 1483 Gs
148.3 mT
 1.30 kg / 2.87 lbs
1303.0 g / 12.8 N
 safe
2 mm 1320 Gs
132.0 mT
 1.03 kg / 2.28 lbs
1032.2 g / 10.1 N
 safe
3 mm 1137 Gs
113.7 mT
 0.77 kg / 1.69 lbs
765.0 g / 7.5 N
 safe
5 mm 791 Gs
79.1 mT
 0.37 kg / 0.82 lbs
370.8 g / 3.6 N
 safe
10 mm 298 Gs
29.8 mT
 0.05 kg / 0.12 lbs
52.5 g / 0.5 N
 safe
15 mm 127 Gs
12.7 mT
 0.01 kg / 0.02 lbs
9.6 g / 0.1 N
 safe
20 mm 63 Gs
6.3 mT
 0.00 kg / 0.01 lbs
2.4 g / 0.0 N
 safe
30 mm 22 Gs
2.2 mT
 0.00 kg / 0.00 lbs
0.3 g / 0.0 N
 safe
50 mm 5 Gs
0.5 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 safe
Pulling power weakens significantly with every mm of spacing. Remember that even the smallest gap (e.g., contamination, paint, dust) significantly weakens the grip. Magnets operate most effectively during direct contact; distance kills the force. Notice how quickly the pull force drop, when the magnet does not touch directly to the metal substrate. When planning the assembly, discard redundant distances.

Table 2: Shear hold (wall)
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
This section defines the estimated force required to start the sliding of the magnet down against a vertical steel wall (considering typical friction coefficient). This parameter is a function of the distance between the magnet and the surface.

Table 3: Vertical assembly (shearing) - 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 element on a upright plane (e.g., a board), it will only hold just approx. 1/5 of nominal attraction strength. Gravity as well as a low friction coefficient cause that products slip easier than they detach. Planning a hanger? Consider that the sliding force is much weaker than the maximum static pull force. On a smooth steel, the magnet will give way down under a much lighter weight. Utilizing a rubberized layer can significantly increase the grip.

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 full magnetic flux, which wastes potential of the holder. If you mount a strong magnet to a too thin substrate, the field will pass right through and the attraction force will be weaker. To squeeze 100% of this magnet's power, you require a sufficiently solid element of steel. The saturation phenomenon means that on sheet metal structures (e.g., car bodies), the product holds weaker. We recommend selecting the steel thickness from these parameters.

Table 5: Thermal stability (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
Standard neodymium magnets change their properties parameters past the thermal threshold. Watch out for overheating – excessive heat can irreversibly destroy this product. With increasing heat, the neodymium's power temporarily lowers. Refrain from using this product close to ovens higher than its operating temperature limit. Too high temperature will cause destruction of magnetism.
*Important note: Heat tolerance depends not only on the material grade, as well as the dimension ratios. Thin magnets (low Pc) are more susceptible to demagnetization at lower temperatures than long magnets. Red status in the table points to permanent field degradation for this specific geometry.

Table 6: Two magnets (repulsion) - 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 much further distance than a neodymium and metal setup. Such a system of two magnets creates a more powerful interaction and a larger range of performance. Want to build a strong closure? Utilize two neodymiums instead of one magnet and a striker plate. Exercise caution that when connecting a pair of magnets, the impact force is extreme. The levitation is slightly lower than the attraction, but still significant.
*Flux density for N-N configuration is approximately ~0 Gs at the midpoint of the gap (resulting from vector opposition).
Note: Results apply to friction force of dual matching magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (implants) - 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
Mechanical watch 20 Gs (2.0 mT) 3.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.5 cm
Remote 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 poses a serious hazard to electronics as well as pacemakers. These NdFeB products produce a flux that destroys function of digital equipment. Notice: the unseen radiation acts through matter and housings. Exceptional care must be taken by people with hearing aids and drug dispensers. Also at risk are: automatic timepieces, remotes, membranes, and screens. Do not bring the product near payment cards, hard drives, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - collision effects
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
Magnetic elements are very brittle – a violent impact against metal causes immediate chipping. Control the attraction moment – a neodymium left loose turns into a projectile. Impact energy can destroy the magnet or dangerous crushing to fingers. Hold the magnet firmly during mounting so it doesn't slam with momentum against the metal. A collision at high speed almost guarantees destruction of the magnet. Wear safety glasses when working with large magnets.

Table 9: Coating parameters (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. Improper coating selection is the most common cause of magnet failure over time.

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)
Total magnetic flux passing through the magnet pole. Essential parameter in coil applications as well as sensors. The Pc coefficient defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
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%
Warning: 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. Buoyancy helps in lifting finds.
1. Wall mount (shear)

*Caution: On a vertical surface, the magnet holds merely ~20% of its max power.

2. Steel thickness impact

*Thin steel (e.g. 0.5mm PC case) severely weakens the holding force.

3. Temperature resistance

*For standard magnets, the critical limit 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.

Engineering data and GPSR
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: 010028-2026
Measurement Calculator
Pulling force
Field Strength
Input data in one of the inputs, and the rest change automatically.

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The offered product is an exceptionally strong rod magnet, made from advanced NdFeB material, which, with dimensions of Ø15x2 mm, guarantees optimal power. The MW 15x2 / N38 component features a tolerance of ±0.1mm and professional build quality, making it a perfect solution for professional engineers and designers. As a magnetic rod with significant force (approx. 1.51 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is perfect for building electric motors, advanced Hall effect sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the high power 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 very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 15.1 mm) using epoxy glues. To ensure stability in automation, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering a great economic balance and operational stability. If you need the strongest magnets in the same volume (Ø15x2), 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 Ø15x2 mm, which, at a weight of 2.65 g, makes it an element with high magnetic energy density. The key parameter here is the holding force amounting to approximately 1.51 kg (force ~14.84 N), which, with such defined dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface 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 15 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.

Strengths and weaknesses of rare earth magnets.

Strengths

Besides their exceptional field intensity, neodymium magnets offer the following advantages:
  • Their power is maintained, and after approximately ten years it decreases only by ~1% (according to research),
  • They possess excellent resistance to magnetic field loss as a result of opposing magnetic fields,
  • Thanks to the shiny finish, the surface of nickel, gold-plated, or silver gives an visually attractive appearance,
  • Magnets have huge magnetic induction on the active area,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Thanks to versatility in shaping and the ability to customize to client solutions,
  • Huge importance in high-tech industry – they find application in magnetic memories, electric motors, medical equipment, and other advanced devices.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Cons

Disadvantages of NdFeB magnets:
  • At strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • NdFeB magnets demagnetize 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 very resistant to heat
  • They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Limited ability of producing nuts in the magnet and complex shapes - recommended is casing - magnet mounting.
  • Possible danger to health – tiny shards of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Additionally, small elements of these devices are able to complicate diagnosis medical in case of swallowing.
  • Due to neodymium price, their price exceeds standard values,

Holding force characteristics

Breakaway strength of the magnet in ideal conditions – what contributes to it?

Information about lifting capacity is the result of a measurement for the most favorable conditions, including:
  • using a base made of high-permeability steel, serving as a magnetic yoke
  • with a cross-section of at least 10 mm
  • characterized by lack of roughness
  • under conditions of gap-free contact (surface-to-surface)
  • during detachment in a direction perpendicular to the plane
  • at conditions approx. 20°C

Determinants of lifting force in real conditions

Please note that the application force will differ influenced by elements below, starting with the most relevant:
  • Space between magnet and steel – every millimeter of separation (caused e.g. by varnish or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Plate thickness – too thin plate causes magnetic saturation, causing part of the power to be escaped into the air.
  • Plate material – mild steel gives the best results. Alloy admixtures reduce magnetic permeability and holding force.
  • Plate texture – ground elements guarantee perfect abutment, which increases field saturation. Uneven metal weaken the grip.
  • Heat – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and in frost gain strength (up to a certain limit).

Lifting capacity testing was performed on a smooth plate of optimal thickness, under perpendicular forces, whereas under attempts to slide the magnet the load capacity is reduced by as much as fivefold. Additionally, even a minimal clearance between the magnet and the plate lowers the holding force.

Safe handling of NdFeB magnets
Product not for children

Strictly store magnets out of reach of children. Risk of swallowing is high, and the consequences of magnets clamping inside the body are very dangerous.

Bodily injuries

Big blocks can smash fingers instantly. Under no circumstances place your hand betwixt two attracting surfaces.

Keep away from computers

Intense magnetic fields can erase data on payment cards, hard drives, and other magnetic media. Keep a distance of min. 10 cm.

GPS and phone interference

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

Danger to pacemakers

Health Alert: Neodymium magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.

Do not overheat magnets

Do not overheat. NdFeB magnets are sensitive to temperature. If you need resistance above 80°C, look for special high-temperature series (H, SH, UH).

Avoid contact if allergic

A percentage of the population suffer from a hypersensitivity to nickel, which is the typical protective layer for NdFeB magnets. Prolonged contact may cause skin redness. It is best to wear safety gloves.

Handling guide

Use magnets with awareness. Their powerful strength can shock even experienced users. Stay alert and respect their force.

Eye protection

Neodymium magnets are sintered ceramics, which means they are prone to chipping. Clashing of two magnets leads to them cracking into small pieces.

Flammability

Dust created during cutting of magnets is combustible. Avoid drilling into magnets unless you are an expert.

Attention! Looking for details? Check our post: Are neodymium magnets dangerous?