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MW 18x1.5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010037

GTIN/EAN: 5906301810360

5.00

Diameter Ø

18 mm [±0,1 mm]

Height

1.5 mm [±0,1 mm]

Weight

2.86 g

Magnetization Direction

↑ axial

Load capacity

0.95 kg / 9.34 N

Magnetic Induction

101.91 mT / 1019 Gs

Coating

[NiCuNi] Nickel

1.353 with VAT / pcs + price for transport

1.100 ZŁ net + 23% VAT / pcs

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Technical details - MW 18x1.5 / N38 - cylindrical magnet

Specification / characteristics - MW 18x1.5 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010037
GTIN/EAN 5906301810360
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 18 mm [±0,1 mm]
Height 1.5 mm [±0,1 mm]
Weight 2.86 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.95 kg / 9.34 N
Magnetic Induction ~ ? 101.91 mT / 1019 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 18x1.5 / 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 simulation of the product - technical parameters

Presented information constitute the direct effect of a physical analysis. Results are based on algorithms for the class Nd2Fe14B. Operational performance may deviate from the simulation results. Treat these data as a preliminary roadmap when designing systems.

Table 1: Static pull force (pull vs gap) - interaction chart
MW 18x1.5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1019 Gs
101.9 mT
0.95 kg / 2.09 lbs
950.0 g / 9.3 N
low risk
1 mm 975 Gs
97.5 mT
0.87 kg / 1.92 lbs
869.2 g / 8.5 N
low risk
2 mm 902 Gs
90.2 mT
0.74 kg / 1.64 lbs
744.7 g / 7.3 N
low risk
3 mm 812 Gs
81.2 mT
0.60 kg / 1.33 lbs
603.4 g / 5.9 N
low risk
5 mm 619 Gs
61.9 mT
0.35 kg / 0.77 lbs
350.6 g / 3.4 N
low risk
10 mm 274 Gs
27.4 mT
0.07 kg / 0.15 lbs
68.7 g / 0.7 N
low risk
15 mm 126 Gs
12.6 mT
0.01 kg / 0.03 lbs
14.6 g / 0.1 N
low risk
20 mm 65 Gs
6.5 mT
0.00 kg / 0.01 lbs
3.9 g / 0.0 N
low risk
30 mm 23 Gs
2.3 mT
0.00 kg / 0.00 lbs
0.5 g / 0.0 N
low risk
50 mm 6 Gs
0.6 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
low risk

Table 2: Vertical capacity (wall)
MW 18x1.5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.19 kg / 0.42 lbs
190.0 g / 1.9 N
1 mm Stal (~0.2) 0.17 kg / 0.38 lbs
174.0 g / 1.7 N
2 mm Stal (~0.2) 0.15 kg / 0.33 lbs
148.0 g / 1.5 N
3 mm Stal (~0.2) 0.12 kg / 0.26 lbs
120.0 g / 1.2 N
5 mm Stal (~0.2) 0.07 kg / 0.15 lbs
70.0 g / 0.7 N
10 mm Stal (~0.2) 0.01 kg / 0.03 lbs
14.0 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) - behavior on slippery surfaces
MW 18x1.5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.29 kg / 0.63 lbs
285.0 g / 2.8 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.19 kg / 0.42 lbs
190.0 g / 1.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.10 kg / 0.21 lbs
95.0 g / 0.9 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.48 kg / 1.05 lbs
475.0 g / 4.7 N

Table 4: Material efficiency (saturation) - sheet metal selection
MW 18x1.5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.10 kg / 0.21 lbs
95.0 g / 0.9 N
1 mm
25%
0.24 kg / 0.52 lbs
237.5 g / 2.3 N
2 mm
50%
0.48 kg / 1.05 lbs
475.0 g / 4.7 N
3 mm
75%
0.71 kg / 1.57 lbs
712.5 g / 7.0 N
5 mm
100%
0.95 kg / 2.09 lbs
950.0 g / 9.3 N
10 mm
100%
0.95 kg / 2.09 lbs
950.0 g / 9.3 N
11 mm
100%
0.95 kg / 2.09 lbs
950.0 g / 9.3 N
12 mm
100%
0.95 kg / 2.09 lbs
950.0 g / 9.3 N

Table 5: Working in heat (material behavior) - resistance threshold
MW 18x1.5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.95 kg / 2.09 lbs
950.0 g / 9.3 N
OK
40 °C -2.2% 0.93 kg / 2.05 lbs
929.1 g / 9.1 N
OK
60 °C -4.4% 0.91 kg / 2.00 lbs
908.2 g / 8.9 N
80 °C -6.6% 0.89 kg / 1.96 lbs
887.3 g / 8.7 N
100 °C -28.8% 0.68 kg / 1.49 lbs
676.4 g / 6.6 N

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 18x1.5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 1.63 kg / 3.59 lbs
1 960 Gs
0.24 kg / 0.54 lbs
244 g / 2.4 N
N/A
1 mm 1.57 kg / 3.47 lbs
2 002 Gs
0.24 kg / 0.52 lbs
236 g / 2.3 N
1.41 kg / 3.12 lbs
~0 Gs
2 mm 1.49 kg / 3.29 lbs
1 949 Gs
0.22 kg / 0.49 lbs
224 g / 2.2 N
1.34 kg / 2.96 lbs
~0 Gs
3 mm 1.39 kg / 3.06 lbs
1 883 Gs
0.21 kg / 0.46 lbs
209 g / 2.0 N
1.25 kg / 2.76 lbs
~0 Gs
5 mm 1.16 kg / 2.55 lbs
1 717 Gs
0.17 kg / 0.38 lbs
174 g / 1.7 N
1.04 kg / 2.30 lbs
~0 Gs
10 mm 0.60 kg / 1.33 lbs
1 238 Gs
0.09 kg / 0.20 lbs
90 g / 0.9 N
0.54 kg / 1.19 lbs
~0 Gs
20 mm 0.12 kg / 0.26 lbs
548 Gs
0.02 kg / 0.04 lbs
18 g / 0.2 N
0.11 kg / 0.23 lbs
~0 Gs
50 mm 0.00 kg / 0.00 lbs
74 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
46 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
30 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
21 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
15 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
11 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Hazards (electronics) - warnings
MW 18x1.5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 5.5 cm
Hearing aid 10 Gs (1.0 mT) 4.5 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

Table 8: Dynamics (cracking risk) - collision effects
MW 18x1.5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 19.19 km/h
(5.33 m/s)
0.04 J
30 mm 31.85 km/h
(8.85 m/s)
0.11 J
50 mm 41.10 km/h
(11.42 m/s)
0.19 J
100 mm 58.12 km/h
(16.15 m/s)
0.37 J

Table 9: Coating parameters (durability)
MW 18x1.5 / 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 18x1.5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 3 519 Mx 35.2 µWb
Pc Coefficient 0.13 Low (Flat)

Table 11: Hydrostatics and buoyancy
MW 18x1.5 / N38

Environment Effective steel pull Effect
Air (land) 0.95 kg Standard
Water (riverbed) 1.09 kg
(+0.14 kg buoyancy gain)
+14.5%
Rust risk: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Shear force

*Warning: On a vertical surface, the magnet holds only approx. 20-30% of its max power.

2. Plate thickness effect

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

3. Power loss vs temp

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.13

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
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%
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: 010037-2026
Measurement Calculator
Force (pull)

Magnetic Field

Other products

This product is an incredibly powerful cylindrical magnet, produced from modern NdFeB material, which, at dimensions of Ø18x1.5 mm, guarantees maximum efficiency. This specific item boasts a tolerance of ±0.1mm and professional build quality, making it an excellent solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 0.95 kg), this product is in stock from our European logistics center, ensuring rapid order fulfillment. Furthermore, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
It successfully proves itself in modeling, advanced robotics, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 9.34 N with a weight of only 2.86 g, this rod is indispensable in electronics and wherever low weight is crucial.
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., 18.1 mm) using epoxy glues. To ensure long-term durability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most popular standard for professional neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø18x1.5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.
This model is characterized by dimensions Ø18x1.5 mm, which, at a weight of 2.86 g, makes it an element with impressive magnetic energy density. The key parameter here is the holding force amounting to approximately 0.95 kg (force ~9.34 N), which, with such defined dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which secures it against external factors, 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 18 mm. 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 and disadvantages of neodymium magnets.

Pros

Besides their durability, neodymium magnets are valued for these benefits:
  • They have unchanged lifting capacity, and over nearly 10 years their performance decreases symbolically – ~1% (according to theory),
  • They do not lose their magnetic properties even under strong external field,
  • A magnet with a shiny gold surface has better aesthetics,
  • Magnetic induction on the surface of the magnet turns out to be strong,
  • Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to the possibility of precise shaping and adaptation to unique projects, NdFeB magnets can be created in a broad palette of forms and dimensions, which increases their versatility,
  • Fundamental importance in innovative solutions – they are utilized in data components, electric drive systems, medical equipment, also industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which allows their use in compact constructions

Limitations

What to avoid - cons of neodymium magnets: weaknesses and usage proposals
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a special holder, which not only protects them against impacts but also increases their durability
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • Due to limitations in realizing nuts and complex shapes in magnets, we propose using casing - magnetic mount.
  • Health risk related to microscopic parts of magnets can be dangerous, in case of ingestion, which is particularly important in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products can be problematic in diagnostics medical after entering the body.
  • Due to neodymium price, their price is relatively high,

Lifting parameters

Optimal lifting capacity of a neodymium magnetwhat it depends on?

The declared magnet strength refers to the maximum value, recorded under ideal test conditions, meaning:
  • with the application of a yoke made of special test steel, ensuring maximum field concentration
  • whose thickness reaches at least 10 mm
  • with a surface perfectly flat
  • without any insulating layer between the magnet and steel
  • under axial application of breakaway force (90-degree angle)
  • at temperature room level

Determinants of practical lifting force of a magnet

Please note that the magnet holding may be lower subject to elements below, in order of importance:
  • Gap between surfaces – every millimeter of separation (caused e.g. by veneer or dirt) diminishes the pulling force, often by half at just 0.5 mm.
  • Loading method – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of converting into lifting capacity.
  • Steel type – low-carbon steel gives the best results. Higher carbon content reduce magnetic properties and holding force.
  • Smoothness – ideal contact is possible only on polished steel. Rough texture create air cushions, reducing force.
  • Operating temperature – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under parallel forces the holding force is lower. In addition, even a small distance between the magnet and the plate lowers the holding force.

Safety rules for work with neodymium magnets
Shattering risk

Despite the nickel coating, neodymium is delicate and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Do not underestimate power

Handle with care. Rare earth magnets act from a distance and connect with massive power, often quicker than you can move away.

Heat warning

Do not overheat. Neodymium magnets are sensitive to temperature. If you require resistance above 80°C, look for HT versions (H, SH, UH).

Keep away from computers

Very strong magnetic fields can corrupt files on payment cards, HDDs, and other magnetic media. Maintain a gap of at least 10 cm.

Metal Allergy

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction occurs, immediately stop working with magnets and wear gloves.

Keep away from electronics

A strong magnetic field negatively affects the functioning of magnetometers in phones and GPS navigation. Keep magnets close to a smartphone to prevent breaking the sensors.

Mechanical processing

Fire hazard: Neodymium dust is explosive. Do not process magnets without safety gear as this risks ignition.

Danger to pacemakers

Life threat: Strong magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.

Choking Hazard

Neodymium magnets are not intended for children. Swallowing several magnets can lead to them attracting across intestines, which poses a direct threat to life and necessitates urgent medical intervention.

Bone fractures

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

Safety First! Need more info? Read our article: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98