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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

Engineering modeling of the magnet - data

Presented data are the outcome of a mathematical calculation. Results rely on models for the class Nd2Fe14B. Operational conditions might slightly deviate from the simulation results. Treat these data as a preliminary roadmap when designing systems.

Table 1: Static force (pull vs distance) - power drop
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 pounds
950.0 g / 9.3 N
safe
1 mm 975 Gs
97.5 mT
0.87 kg / 1.92 pounds
869.2 g / 8.5 N
safe
2 mm 902 Gs
90.2 mT
0.74 kg / 1.64 pounds
744.7 g / 7.3 N
safe
3 mm 812 Gs
81.2 mT
0.60 kg / 1.33 pounds
603.4 g / 5.9 N
safe
5 mm 619 Gs
61.9 mT
0.35 kg / 0.77 pounds
350.6 g / 3.4 N
safe
10 mm 274 Gs
27.4 mT
0.07 kg / 0.15 pounds
68.7 g / 0.7 N
safe
15 mm 126 Gs
12.6 mT
0.01 kg / 0.03 pounds
14.6 g / 0.1 N
safe
20 mm 65 Gs
6.5 mT
0.00 kg / 0.01 pounds
3.9 g / 0.0 N
safe
30 mm 23 Gs
2.3 mT
0.00 kg / 0.00 pounds
0.5 g / 0.0 N
safe
50 mm 6 Gs
0.6 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
safe

Table 2: Shear force (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 pounds
190.0 g / 1.9 N
1 mm Stal (~0.2) 0.17 kg / 0.38 pounds
174.0 g / 1.7 N
2 mm Stal (~0.2) 0.15 kg / 0.33 pounds
148.0 g / 1.5 N
3 mm Stal (~0.2) 0.12 kg / 0.26 pounds
120.0 g / 1.2 N
5 mm Stal (~0.2) 0.07 kg / 0.15 pounds
70.0 g / 0.7 N
10 mm Stal (~0.2) 0.01 kg / 0.03 pounds
14.0 g / 0.1 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N

Table 3: Wall mounting (sliding) - vertical pull
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 pounds
285.0 g / 2.8 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.19 kg / 0.42 pounds
190.0 g / 1.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.10 kg / 0.21 pounds
95.0 g / 0.9 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.48 kg / 1.05 pounds
475.0 g / 4.7 N

Table 4: Steel thickness (substrate influence) - 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 pounds
95.0 g / 0.9 N
1 mm
25%
0.24 kg / 0.52 pounds
237.5 g / 2.3 N
2 mm
50%
0.48 kg / 1.05 pounds
475.0 g / 4.7 N
3 mm
75%
0.71 kg / 1.57 pounds
712.5 g / 7.0 N
5 mm
100%
0.95 kg / 2.09 pounds
950.0 g / 9.3 N
10 mm
100%
0.95 kg / 2.09 pounds
950.0 g / 9.3 N
11 mm
100%
0.95 kg / 2.09 pounds
950.0 g / 9.3 N
12 mm
100%
0.95 kg / 2.09 pounds
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 pounds
950.0 g / 9.3 N
OK
40 °C -2.2% 0.93 kg / 2.05 pounds
929.1 g / 9.1 N
OK
60 °C -4.4% 0.91 kg / 2.00 pounds
908.2 g / 8.9 N
80 °C -6.6% 0.89 kg / 1.96 pounds
887.3 g / 8.7 N
100 °C -28.8% 0.68 kg / 1.49 pounds
676.4 g / 6.6 N

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

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

Table 7: Safety (HSE) (implants) - 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
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

Table 8: Dynamics (cracking risk) - warning
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: Corrosion resistance
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 (Pc)
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%
Corrosion warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Wall mount (shear)

*Warning: On a vertical wall, the magnet holds only a fraction of its perpendicular strength.

2. Efficiency vs thickness

*Thin steel (e.g. computer case) significantly weakens the holding force.

3. Thermal stability

*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) = 0.13

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.

Technical and environmental data
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%
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: 010037-2026
Measurement Calculator
Magnet pull force

Field Strength

Other deals

The presented product is an extremely powerful rod magnet, manufactured from durable NdFeB material, which, with dimensions of Ø18x1.5 mm, guarantees optimal power. This specific item is characterized by high dimensional repeatability and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 0.95 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Moreover, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
It finds application 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 cylindrical magnet is indispensable in electronics and wherever low weight is crucial.
Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 18.1 mm) using epoxy glues. To ensure stability 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 frequently chosen 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 (Ø18x1.5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.
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 value of 9.34 N means that the magnet is capable of holding a weight many times exceeding its own mass of 2.86 g. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 1.5 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 diametrically if your project requires it.

Pros and cons of Nd2Fe14B magnets.

Advantages

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (according to literature),
  • Magnets very well defend themselves against loss of magnetization caused by foreign field sources,
  • By applying a lustrous layer of nickel, the element presents an elegant look,
  • They feature high magnetic induction at the operating surface, which improves attraction properties,
  • 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...
  • Due to the ability of flexible molding and adaptation to specialized requirements, neodymium magnets can be produced in a variety of forms and dimensions, which amplifies use scope,
  • Key role in high-tech industry – they serve a role in hard drives, motor assemblies, advanced medical instruments, and technologically advanced constructions.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

Disadvantages of neodymium magnets:
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a strong case, which not only secures them against impacts but also raises their durability
  • Neodymium magnets decrease their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
  • Limited possibility of producing threads in the magnet and complex forms - preferred is cover - magnetic holder.
  • Possible danger to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the context of child safety. Furthermore, small components of these devices are able to disrupt the diagnostic process medical when they are in the body.
  • With mass production the cost of neodymium magnets can be a barrier,

Lifting parameters

Maximum holding power of the magnet – what contributes to it?

The lifting capacity listed is a result of laboratory testing performed under specific, ideal conditions:
  • with the application of a sheet made of special test steel, guaranteeing full magnetic saturation
  • whose thickness is min. 10 mm
  • with an polished contact surface
  • with direct contact (without paint)
  • during detachment in a direction perpendicular to the mounting surface
  • in stable room temperature

Determinants of lifting force in real conditions

In real-world applications, the real power is determined by a number of factors, presented from most significant:
  • Gap (between the magnet and the metal), because even a microscopic distance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to paint, rust or dirt).
  • Pull-off angle – note that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the maximum value.
  • Plate thickness – too thin sheet causes magnetic saturation, causing part of the flux to be wasted to the other side.
  • Metal type – different alloys reacts the same. Alloy additives weaken the attraction effect.
  • Surface quality – the more even the plate, the better the adhesion and higher the lifting capacity. Unevenness acts like micro-gaps.
  • Heat – neodymium magnets have a sensitivity to temperature. When it is hot they are weaker, and in frost they can be stronger (up to a certain limit).

Lifting capacity testing was conducted on a smooth plate of suitable thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a slight gap between the magnet’s surface and the plate lowers the lifting capacity.

Safe handling of NdFeB magnets
Handling guide

Use magnets consciously. Their powerful strength can surprise even experienced users. Plan your moves and do not underestimate their power.

Power loss in heat

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

Danger to pacemakers

Health Alert: Neodymium magnets can deactivate pacemakers and defibrillators. Do not approach if you have electronic implants.

Magnetic interference

GPS units and smartphones are extremely sensitive to magnetic fields. Direct contact with a powerful NdFeB magnet can permanently damage the sensors in your phone.

Safe distance

Intense magnetic fields can erase data on credit cards, HDDs, and other magnetic media. Maintain a gap of at least 10 cm.

Do not drill into magnets

Powder produced during grinding of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.

Allergy Warning

Medical facts indicate that nickel (standard magnet coating) is a potent allergen. For allergy sufferers, refrain from touching magnets with bare hands and opt for coated magnets.

Beware of splinters

NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Clashing of two magnets will cause them shattering into shards.

Do not give to children

Strictly keep magnets away from children. Risk of swallowing is high, and the consequences of magnets connecting inside the body are very dangerous.

Physical harm

Watch your fingers. Two large magnets will join immediately with a force of massive weight, crushing anything in their path. Be careful!

Security! Learn more about hazards in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98