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MW 16x9 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010035

GTIN/EAN: 5906301810346

5.00

Diameter Ø

16 mm [±0,1 mm]

Height

9 mm [±0,1 mm]

Weight

13.57 g

Magnetization Direction

↑ axial

Load capacity

8.53 kg / 83.64 N

Magnetic Induction

463.05 mT / 4631 Gs

Coating

[NiCuNi] Nickel

7.36 with VAT / pcs + price for transport

5.98 ZŁ net + 23% VAT / pcs

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Detailed specification - MW 16x9 / N38 - cylindrical magnet

Specification / characteristics - MW 16x9 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010035
GTIN/EAN 5906301810346
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 16 mm [±0,1 mm]
Height 9 mm [±0,1 mm]
Weight 13.57 g
Magnetization Direction ↑ axial
Load capacity ~ ? 8.53 kg / 83.64 N
Magnetic Induction ~ ? 463.05 mT / 4631 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 16x9 / 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 simulation of the magnet - technical parameters

The following data represent the outcome of a mathematical simulation. Results were calculated on algorithms for the class Nd2Fe14B. Operational conditions might slightly differ from theoretical values. Treat these data as a preliminary roadmap during assembly planning.

Table 1: Static force (force vs distance) - characteristics
MW 16x9 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4628 Gs
462.8 mT
8.53 kg / 18.81 pounds
8530.0 g / 83.7 N
warning
1 mm 4072 Gs
407.2 mT
6.60 kg / 14.56 pounds
6603.5 g / 64.8 N
warning
2 mm 3510 Gs
351.0 mT
4.91 kg / 10.82 pounds
4906.8 g / 48.1 N
warning
3 mm 2982 Gs
298.2 mT
3.54 kg / 7.80 pounds
3540.1 g / 34.7 N
warning
5 mm 2097 Gs
209.7 mT
1.75 kg / 3.86 pounds
1751.1 g / 17.2 N
low risk
10 mm 873 Gs
87.3 mT
0.30 kg / 0.67 pounds
303.3 g / 3.0 N
low risk
15 mm 411 Gs
41.1 mT
0.07 kg / 0.15 pounds
67.3 g / 0.7 N
low risk
20 mm 220 Gs
22.0 mT
0.02 kg / 0.04 pounds
19.3 g / 0.2 N
low risk
30 mm 83 Gs
8.3 mT
0.00 kg / 0.01 pounds
2.7 g / 0.0 N
low risk
50 mm 22 Gs
2.2 mT
0.00 kg / 0.00 pounds
0.2 g / 0.0 N
low risk

Table 2: Sliding capacity (vertical surface)
MW 16x9 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 1.71 kg / 3.76 pounds
1706.0 g / 16.7 N
1 mm Stal (~0.2) 1.32 kg / 2.91 pounds
1320.0 g / 12.9 N
2 mm Stal (~0.2) 0.98 kg / 2.16 pounds
982.0 g / 9.6 N
3 mm Stal (~0.2) 0.71 kg / 1.56 pounds
708.0 g / 6.9 N
5 mm Stal (~0.2) 0.35 kg / 0.77 pounds
350.0 g / 3.4 N
10 mm Stal (~0.2) 0.06 kg / 0.13 pounds
60.0 g / 0.6 N
15 mm Stal (~0.2) 0.01 kg / 0.03 pounds
14.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.01 pounds
4.0 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 16x9 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
2.56 kg / 5.64 pounds
2559.0 g / 25.1 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.71 kg / 3.76 pounds
1706.0 g / 16.7 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.85 kg / 1.88 pounds
853.0 g / 8.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
4.27 kg / 9.40 pounds
4265.0 g / 41.8 N

Table 4: Steel thickness (substrate influence) - power losses
MW 16x9 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.85 kg / 1.88 pounds
853.0 g / 8.4 N
1 mm
25%
2.13 kg / 4.70 pounds
2132.5 g / 20.9 N
2 mm
50%
4.27 kg / 9.40 pounds
4265.0 g / 41.8 N
3 mm
75%
6.40 kg / 14.10 pounds
6397.5 g / 62.8 N
5 mm
100%
8.53 kg / 18.81 pounds
8530.0 g / 83.7 N
10 mm
100%
8.53 kg / 18.81 pounds
8530.0 g / 83.7 N
11 mm
100%
8.53 kg / 18.81 pounds
8530.0 g / 83.7 N
12 mm
100%
8.53 kg / 18.81 pounds
8530.0 g / 83.7 N

Table 5: Working in heat (stability) - resistance threshold
MW 16x9 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 8.53 kg / 18.81 pounds
8530.0 g / 83.7 N
OK
40 °C -2.2% 8.34 kg / 18.39 pounds
8342.3 g / 81.8 N
OK
60 °C -4.4% 8.15 kg / 17.98 pounds
8154.7 g / 80.0 N
OK
80 °C -6.6% 7.97 kg / 17.56 pounds
7967.0 g / 78.2 N
100 °C -28.8% 6.07 kg / 13.39 pounds
6073.4 g / 59.6 N

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 16x9 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 26.55 kg / 58.54 pounds
5 658 Gs
3.98 kg / 8.78 pounds
3983 g / 39.1 N
N/A
1 mm 23.52 kg / 51.85 pounds
8 711 Gs
3.53 kg / 7.78 pounds
3528 g / 34.6 N
21.17 kg / 46.66 pounds
~0 Gs
2 mm 20.56 kg / 45.32 pounds
8 145 Gs
3.08 kg / 6.80 pounds
3084 g / 30.2 N
18.50 kg / 40.79 pounds
~0 Gs
3 mm 17.80 kg / 39.23 pounds
7 578 Gs
2.67 kg / 5.89 pounds
2669 g / 26.2 N
16.02 kg / 35.31 pounds
~0 Gs
5 mm 13.01 kg / 28.69 pounds
6 481 Gs
1.95 kg / 4.30 pounds
1952 g / 19.2 N
11.71 kg / 25.82 pounds
~0 Gs
10 mm 5.45 kg / 12.02 pounds
4 194 Gs
0.82 kg / 1.80 pounds
818 g / 8.0 N
4.91 kg / 10.82 pounds
~0 Gs
20 mm 0.94 kg / 2.08 pounds
1 746 Gs
0.14 kg / 0.31 pounds
142 g / 1.4 N
0.85 kg / 1.87 pounds
~0 Gs
50 mm 0.02 kg / 0.05 pounds
260 Gs
0.00 kg / 0.01 pounds
3 g / 0.0 N
0.02 kg / 0.04 pounds
~0 Gs
60 mm 0.01 kg / 0.02 pounds
166 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.01 pounds
112 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
79 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
58 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
43 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Hazards (electronics) - precautionary measures
MW 16x9 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 8.5 cm
Hearing aid 10 Gs (1.0 mT) 7.0 cm
Timepiece 20 Gs (2.0 mT) 5.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 4.0 cm
Remote 50 Gs (5.0 mT) 4.0 cm
Payment card 400 Gs (40.0 mT) 2.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.5 cm

Table 8: Dynamics (kinetic energy) - collision effects
MW 16x9 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 25.84 km/h
(7.18 m/s)
0.35 J
30 mm 43.80 km/h
(12.17 m/s)
1.00 J
50 mm 56.54 km/h
(15.71 m/s)
1.67 J
100 mm 79.96 km/h
(22.21 m/s)
3.35 J

Table 9: Surface protection spec
MW 16x9 / 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: Construction data (Pc)
MW 16x9 / N38

Parameter Value SI Unit / Description
Magnetic Flux 9 394 Mx 93.9 µWb
Pc Coefficient 0.63 High (Stable)

Table 11: Physics of underwater searching
MW 16x9 / N38

Environment Effective steel pull Effect
Air (land) 8.53 kg Standard
Water (riverbed) 9.77 kg
(+1.24 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. Sliding resistance

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

2. Steel saturation

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

3. Temperature resistance

*For N38 material, the critical limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.63

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%
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: 010035-2026
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Pulling force

Magnetic Induction

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The offered product is a very strong rod magnet, composed of advanced NdFeB material, which, with dimensions of Ø16x9 mm, guarantees the highest energy density. The MW 16x9 / N38 model is characterized by 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. 8.53 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It finds application in modeling, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 83.64 N with a weight of only 13.57 g, this cylindrical magnet 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., 16.1 mm) using two-component epoxy glues. To ensure long-term durability in automation, 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 industrial neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need even stronger magnets in the same volume (Ø16x9), 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 16 mm and height 9 mm. The value of 83.64 N means that the magnet is capable of holding a weight many times exceeding its own mass of 13.57 g. The product has a [NiCuNi] coating, which protects the surface against external factors, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 9 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 as well as cons of rare earth magnets.

Pros

Besides their remarkable magnetic power, neodymium magnets offer the following advantages:
  • Their power is maintained, and after approximately 10 years it drops only by ~1% (theoretically),
  • They are noted for resistance to demagnetization induced by external magnetic fields,
  • The use of an aesthetic layer of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
  • Neodymium magnets deliver maximum magnetic induction on a contact point, which ensures high operational effectiveness,
  • 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 modularity in shaping and the ability to modify to complex applications,
  • Wide application in high-tech industry – they are used in magnetic memories, electromotive mechanisms, precision medical tools, also other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in miniature devices

Weaknesses

Disadvantages of NdFeB magnets:
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only protects the magnet but also increases its resistance to damage
  • When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding 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 immune to moisture, in case of application outdoors
  • We recommend cover - magnetic mechanism, due to difficulties in creating threads inside the magnet and complicated forms.
  • Possible danger resulting from small fragments of magnets can be dangerous, in case of ingestion, which becomes key in the context of child safety. It is also worth noting that tiny parts of these magnets can complicate diagnosis medical after entering the body.
  • Due to expensive raw materials, their price exceeds standard values,

Pull force analysis

Optimal lifting capacity of a neodymium magnetwhat affects it?

The specified lifting capacity represents the peak performance, recorded under laboratory conditions, namely:
  • on a block made of mild steel, optimally conducting the magnetic field
  • whose transverse dimension equals approx. 10 mm
  • characterized by lack of roughness
  • under conditions of ideal adhesion (surface-to-surface)
  • for force applied at a right angle (in the magnet axis)
  • in stable room temperature

What influences lifting capacity in practice

Effective lifting capacity is influenced by working environment parameters, mainly (from most important):
  • Distance (between the magnet and the metal), because even a microscopic distance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to paint, rust or debris).
  • Direction of force – highest force is obtained only during pulling at a 90° angle. The shear force of the magnet along the surface is usually several times smaller (approx. 1/5 of the lifting capacity).
  • Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Steel type – mild steel attracts best. Alloy steels reduce magnetic properties and lifting capacity.
  • Surface structure – the smoother and more polished the surface, the better the adhesion and higher the lifting capacity. Unevenness acts like micro-gaps.
  • Temperature influence – hot environment reduces pulling force. Exceeding the limit temperature can permanently damage the magnet.

Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the holding force is lower. Additionally, even a slight gap between the magnet’s surface and the plate reduces the load capacity.

Precautions when working with neodymium magnets
Threat to electronics

Data protection: Strong magnets can ruin data carriers and delicate electronics (heart implants, medical aids, timepieces).

No play value

NdFeB magnets are not suitable for play. Accidental ingestion of multiple magnets may result in them pinching intestinal walls, which constitutes a direct threat to life and requires urgent medical intervention.

Handling rules

Before starting, check safety instructions. Sudden snapping can break the magnet or injure your hand. Think ahead.

Implant safety

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

Combustion hazard

Powder produced during machining of magnets is flammable. Avoid drilling into magnets unless you are an expert.

GPS Danger

Note: rare earth magnets produce a field that confuses precision electronics. Keep a separation from your mobile, device, and navigation systems.

Crushing force

Large magnets can crush fingers in a fraction of a second. Do not put your hand betwixt two attracting surfaces.

Permanent damage

Watch the temperature. Heating the magnet above 80 degrees Celsius will ruin its properties and pulling force.

Fragile material

Protect your eyes. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. We recommend safety glasses.

Allergic reactions

Medical facts indicate that nickel (the usual finish) is a common allergen. For allergy sufferers, refrain from touching magnets with bare hands or choose versions in plastic housing.

Danger! Want to know more? Read our article: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98