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MW 15x1 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010026

GTIN/EAN: 5906301810254

5.00

Diameter Ø

15 mm [±0,1 mm]

Height

1 mm [±0,1 mm]

Weight

1.33 g

Magnetization Direction

↑ axial

Load capacity

0.44 kg / 4.29 N

Magnetic Induction

81.93 mT / 819 Gs

Coating

[NiCuNi] Nickel

0.800 with VAT / pcs + price for transport

0.650 ZŁ net + 23% VAT / pcs

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Technical details - MW 15x1 / N38 - cylindrical magnet

Specification / characteristics - MW 15x1 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010026
GTIN/EAN 5906301810254
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 1 mm [±0,1 mm]
Weight 1.33 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.44 kg / 4.29 N
Magnetic Induction ~ ? 81.93 mT / 819 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 15x1 / 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 modeling of the magnet - data

These information are the outcome of a physical calculation. Values rely on algorithms for the class Nd2Fe14B. Operational parameters may differ. Treat these calculations as a supplementary guide during assembly planning.

Table 1: Static force (force vs distance) - interaction chart
MW 15x1 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 819 Gs
81.9 mT
0.44 kg / 0.97 lbs
440.0 g / 4.3 N
safe
1 mm 778 Gs
77.8 mT
0.40 kg / 0.88 lbs
397.0 g / 3.9 N
safe
2 mm 705 Gs
70.5 mT
0.33 kg / 0.72 lbs
326.0 g / 3.2 N
safe
3 mm 615 Gs
61.5 mT
0.25 kg / 0.55 lbs
248.0 g / 2.4 N
safe
5 mm 434 Gs
43.4 mT
0.12 kg / 0.27 lbs
123.5 g / 1.2 N
safe
10 mm 163 Gs
16.3 mT
0.02 kg / 0.04 lbs
17.3 g / 0.2 N
safe
15 mm 68 Gs
6.8 mT
0.00 kg / 0.01 lbs
3.1 g / 0.0 N
safe
20 mm 34 Gs
3.4 mT
0.00 kg / 0.00 lbs
0.7 g / 0.0 N
safe
30 mm 11 Gs
1.1 mT
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
safe
50 mm 3 Gs
0.3 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe

Table 2: Shear capacity (vertical surface)
MW 15x1 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.09 kg / 0.19 lbs
88.0 g / 0.9 N
1 mm Stal (~0.2) 0.08 kg / 0.18 lbs
80.0 g / 0.8 N
2 mm Stal (~0.2) 0.07 kg / 0.15 lbs
66.0 g / 0.6 N
3 mm Stal (~0.2) 0.05 kg / 0.11 lbs
50.0 g / 0.5 N
5 mm Stal (~0.2) 0.02 kg / 0.05 lbs
24.0 g / 0.2 N
10 mm Stal (~0.2) 0.00 kg / 0.01 lbs
4.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 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: Vertical assembly (sliding) - behavior on slippery surfaces
MW 15x1 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.13 kg / 0.29 lbs
132.0 g / 1.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.09 kg / 0.19 lbs
88.0 g / 0.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.04 kg / 0.10 lbs
44.0 g / 0.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.22 kg / 0.49 lbs
220.0 g / 2.2 N

Table 4: Material efficiency (saturation) - power losses
MW 15x1 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.04 kg / 0.10 lbs
44.0 g / 0.4 N
1 mm
25%
0.11 kg / 0.24 lbs
110.0 g / 1.1 N
2 mm
50%
0.22 kg / 0.49 lbs
220.0 g / 2.2 N
3 mm
75%
0.33 kg / 0.73 lbs
330.0 g / 3.2 N
5 mm
100%
0.44 kg / 0.97 lbs
440.0 g / 4.3 N
10 mm
100%
0.44 kg / 0.97 lbs
440.0 g / 4.3 N
11 mm
100%
0.44 kg / 0.97 lbs
440.0 g / 4.3 N
12 mm
100%
0.44 kg / 0.97 lbs
440.0 g / 4.3 N

Table 5: Working in heat (material behavior) - thermal limit
MW 15x1 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.44 kg / 0.97 lbs
440.0 g / 4.3 N
OK
40 °C -2.2% 0.43 kg / 0.95 lbs
430.3 g / 4.2 N
OK
60 °C -4.4% 0.42 kg / 0.93 lbs
420.6 g / 4.1 N
80 °C -6.6% 0.41 kg / 0.91 lbs
411.0 g / 4.0 N
100 °C -28.8% 0.31 kg / 0.69 lbs
313.3 g / 3.1 N

Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 15x1 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 0.73 kg / 1.61 lbs
1 597 Gs
0.11 kg / 0.24 lbs
110 g / 1.1 N
N/A
1 mm 0.70 kg / 1.55 lbs
1 607 Gs
0.11 kg / 0.23 lbs
106 g / 1.0 N
0.63 kg / 1.40 lbs
~0 Gs
2 mm 0.66 kg / 1.45 lbs
1 556 Gs
0.10 kg / 0.22 lbs
99 g / 1.0 N
0.59 kg / 1.31 lbs
~0 Gs
3 mm 0.60 kg / 1.33 lbs
1 489 Gs
0.09 kg / 0.20 lbs
91 g / 0.9 N
0.54 kg / 1.20 lbs
~0 Gs
5 mm 0.48 kg / 1.05 lbs
1 323 Gs
0.07 kg / 0.16 lbs
71 g / 0.7 N
0.43 kg / 0.95 lbs
~0 Gs
10 mm 0.21 kg / 0.45 lbs
868 Gs
0.03 kg / 0.07 lbs
31 g / 0.3 N
0.18 kg / 0.41 lbs
~0 Gs
20 mm 0.03 kg / 0.06 lbs
325 Gs
0.00 kg / 0.01 lbs
4 g / 0.0 N
0.03 kg / 0.06 lbs
~0 Gs
50 mm 0.00 kg / 0.00 lbs
37 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
23 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
15 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
10 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
7 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
5 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Safety (HSE) (implants) - precautionary measures
MW 15x1 / N38

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

Table 8: Impact energy (cracking risk) - warning
MW 15x1 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 18.79 km/h
(5.22 m/s)
0.02 J
30 mm 31.78 km/h
(8.83 m/s)
0.05 J
50 mm 41.02 km/h
(11.39 m/s)
0.09 J
100 mm 58.01 km/h
(16.11 m/s)
0.17 J

Table 9: Coating parameters (durability)
MW 15x1 / 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)

Table 10: Electrical data (Flux)
MW 15x1 / N38

Parameter Value SI Unit / Description
Magnetic Flux 2 025 Mx 20.3 µWb
Pc Coefficient 0.11 Low (Flat)

Table 11: Underwater work (magnet fishing)
MW 15x1 / N38

Environment Effective steel pull Effect
Air (land) 0.44 kg Standard
Water (riverbed) 0.50 kg
(+0.06 kg buoyancy gain)
+14.5%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Vertical hold

*Warning: On a vertical wall, the magnet retains merely ~20% of its max power.

2. Steel saturation

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

3. Thermal stability

*For standard magnets, the max working temp is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.11

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 and environmental data
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: 010026-2026
Magnet Unit Converter
Pulling force

Field Strength

See also products

The offered product is an incredibly powerful cylindrical magnet, made from durable NdFeB material, which, with dimensions of Ø15x1 mm, guarantees the highest energy density. This specific item boasts high dimensional repeatability and professional build quality, making it a perfect solution for the most demanding engineers and designers. As a magnetic rod with significant force (approx. 0.44 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating secures it against corrosion in typical 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 field concentration on a small surface counts. Thanks to the high power of 4.29 N with a weight of only 1.33 g, this cylindrical magnet is indispensable in electronics and wherever low weight is crucial.
Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure long-term durability in industry, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering an optimal price-to-power ratio and operational stability. If you need the strongest magnets in the same volume (Ø15x1), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 15 mm and height 1 mm. The value of 4.29 N means that the magnet is capable of holding a weight many times exceeding its own mass of 1.33 g. The product has a [NiCuNi] coating, which protects the surface against oxidation, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 1 mm), which means that the N and S poles are located on the flat, circular surfaces. 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.

Pros and cons of rare earth magnets.

Pros

Besides their durability, neodymium magnets are valued for these benefits:
  • Their strength remains stable, and after around ten years it drops only by ~1% (according to research),
  • Neodymium magnets are characterized by extremely resistant to loss of magnetic properties caused by external magnetic fields,
  • Thanks to the smooth finish, the coating of Ni-Cu-Ni, gold, or silver-plated gives an clean appearance,
  • Magnetic induction on the working layer of the magnet turns out to be very high,
  • 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 versatility in shaping and the ability to modify to specific needs,
  • Universal use in innovative solutions – they serve a role in data components, electric motors, medical devices, and modern systems.
  • Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Limitations

Cons of neodymium magnets and ways of using them
  • At strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (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
  • They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • Limited ability of making nuts in the magnet and complicated forms - preferred is casing - magnetic holder.
  • Health risk to health – tiny shards of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child health protection. Additionally, small components of these devices can complicate diagnosis medical after entering the body.
  • With budget limitations the cost of neodymium magnets is a challenge,

Holding force characteristics

Optimal lifting capacity of a neodymium magnetwhat contributes to it?

The declared magnet strength represents the maximum value, measured under ideal test conditions, meaning:
  • using a base made of mild steel, acting as a ideal flux conductor
  • with a cross-section minimum 10 mm
  • characterized by even structure
  • under conditions of no distance (surface-to-surface)
  • for force acting at a right angle (pull-off, not shear)
  • at temperature room level

Practical aspects of lifting capacity – factors

Real force is affected by specific conditions, including (from most important):
  • Distance – existence of foreign body (paint, dirt, gap) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Force direction – declared lifting capacity refers to detachment vertically. When slipping, the magnet exhibits significantly lower power (typically approx. 20-30% of maximum force).
  • Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
  • Material type – the best choice is high-permeability steel. Hardened steels may generate lower lifting capacity.
  • Base smoothness – the smoother and more polished the plate, the better the adhesion and stronger the hold. Unevenness creates an air distance.
  • Thermal factor – high temperature reduces magnetic field. Exceeding the limit temperature can permanently damage the magnet.

Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the load capacity is reduced by as much as 75%. Moreover, even a slight gap between the magnet and the plate decreases the lifting capacity.

Warnings
Do not drill into magnets

Dust produced during grinding of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.

Nickel allergy

It is widely known that nickel (standard magnet coating) is a strong allergen. If your skin reacts to metals, refrain from direct skin contact or opt for versions in plastic housing.

Bone fractures

Danger of trauma: The pulling power is so great that it can cause blood blisters, crushing, and even bone fractures. Protective gloves are recommended.

Precision electronics

Remember: rare earth magnets generate a field that confuses precision electronics. Maintain a separation from your mobile, tablet, and navigation systems.

Do not give to children

NdFeB magnets are not toys. Accidental ingestion of multiple magnets can lead to them connecting inside the digestive tract, which poses a critical condition and necessitates urgent medical intervention.

Handling guide

Before use, read the rules. Sudden snapping can break the magnet or hurt your hand. Think ahead.

Risk of cracking

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

Heat warning

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

Medical interference

Warning for patients: Strong magnetic fields affect medical devices. Maintain at least 30 cm distance or request help to handle the magnets.

Magnetic media

Data protection: Strong magnets can ruin payment cards and delicate electronics (pacemakers, hearing aids, mechanical watches).

Caution! Details about hazards in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98