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MW 22x6 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010047

GTIN/EAN: 5906301810469

5.00

Diameter Ø

22 mm [±0,1 mm]

Height

6 mm [±0,1 mm]

Weight

17.11 g

Magnetization Direction

↑ axial

Load capacity

9.33 kg / 91.51 N

Magnetic Induction

296.78 mT / 2968 Gs

Coating

[NiCuNi] Nickel

6.11 with VAT / pcs + price for transport

4.97 ZŁ net + 23% VAT / pcs

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Technical of the product - MW 22x6 / N38 - cylindrical magnet

Specification / characteristics - MW 22x6 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010047
GTIN/EAN 5906301810469
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 22 mm [±0,1 mm]
Height 6 mm [±0,1 mm]
Weight 17.11 g
Magnetization Direction ↑ axial
Load capacity ~ ? 9.33 kg / 91.51 N
Magnetic Induction ~ ? 296.78 mT / 2968 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 22x6 / 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

Presented information constitute the direct effect of a mathematical calculation. Values were calculated on algorithms for the material Nd2Fe14B. Real-world performance might slightly deviate from the simulation results. Please consider these data as a preliminary roadmap when designing systems.

Table 1: Static pull force (pull vs gap) - power drop
MW 22x6 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2967 Gs
296.7 mT
9.33 kg / 20.57 lbs
9330.0 g / 91.5 N
warning
1 mm 2767 Gs
276.7 mT
8.12 kg / 17.89 lbs
8116.0 g / 79.6 N
warning
2 mm 2538 Gs
253.8 mT
6.82 kg / 15.05 lbs
6824.4 g / 66.9 N
warning
3 mm 2295 Gs
229.5 mT
5.58 kg / 12.30 lbs
5580.8 g / 54.7 N
warning
5 mm 1818 Gs
181.8 mT
3.50 kg / 7.73 lbs
3504.7 g / 34.4 N
warning
10 mm 938 Gs
93.8 mT
0.93 kg / 2.06 lbs
933.4 g / 9.2 N
low risk
15 mm 492 Gs
49.2 mT
0.26 kg / 0.57 lbs
257.0 g / 2.5 N
low risk
20 mm 277 Gs
27.7 mT
0.08 kg / 0.18 lbs
81.6 g / 0.8 N
low risk
30 mm 108 Gs
10.8 mT
0.01 kg / 0.03 lbs
12.4 g / 0.1 N
low risk
50 mm 29 Gs
2.9 mT
0.00 kg / 0.00 lbs
0.9 g / 0.0 N
low risk

Table 2: Shear capacity (wall)
MW 22x6 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 1.87 kg / 4.11 lbs
1866.0 g / 18.3 N
1 mm Stal (~0.2) 1.62 kg / 3.58 lbs
1624.0 g / 15.9 N
2 mm Stal (~0.2) 1.36 kg / 3.01 lbs
1364.0 g / 13.4 N
3 mm Stal (~0.2) 1.12 kg / 2.46 lbs
1116.0 g / 10.9 N
5 mm Stal (~0.2) 0.70 kg / 1.54 lbs
700.0 g / 6.9 N
10 mm Stal (~0.2) 0.19 kg / 0.41 lbs
186.0 g / 1.8 N
15 mm Stal (~0.2) 0.05 kg / 0.11 lbs
52.0 g / 0.5 N
20 mm Stal (~0.2) 0.02 kg / 0.04 lbs
16.0 g / 0.2 N
30 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 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) - vertical pull
MW 22x6 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
2.80 kg / 6.17 lbs
2799.0 g / 27.5 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.87 kg / 4.11 lbs
1866.0 g / 18.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.93 kg / 2.06 lbs
933.0 g / 9.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
4.67 kg / 10.28 lbs
4665.0 g / 45.8 N

Table 4: Material efficiency (saturation) - power losses
MW 22x6 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.93 kg / 2.06 lbs
933.0 g / 9.2 N
1 mm
25%
2.33 kg / 5.14 lbs
2332.5 g / 22.9 N
2 mm
50%
4.67 kg / 10.28 lbs
4665.0 g / 45.8 N
3 mm
75%
7.00 kg / 15.43 lbs
6997.5 g / 68.6 N
5 mm
100%
9.33 kg / 20.57 lbs
9330.0 g / 91.5 N
10 mm
100%
9.33 kg / 20.57 lbs
9330.0 g / 91.5 N
11 mm
100%
9.33 kg / 20.57 lbs
9330.0 g / 91.5 N
12 mm
100%
9.33 kg / 20.57 lbs
9330.0 g / 91.5 N

Table 5: Thermal stability (stability) - thermal limit
MW 22x6 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 9.33 kg / 20.57 lbs
9330.0 g / 91.5 N
OK
40 °C -2.2% 9.12 kg / 20.12 lbs
9124.7 g / 89.5 N
OK
60 °C -4.4% 8.92 kg / 19.66 lbs
8919.5 g / 87.5 N
80 °C -6.6% 8.71 kg / 19.21 lbs
8714.2 g / 85.5 N
100 °C -28.8% 6.64 kg / 14.65 lbs
6643.0 g / 65.2 N

Table 6: Two magnets (repulsion) - field range
MW 22x6 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 20.63 kg / 45.48 lbs
4 566 Gs
3.09 kg / 6.82 lbs
3095 g / 30.4 N
N/A
1 mm 19.34 kg / 42.63 lbs
5 745 Gs
2.90 kg / 6.40 lbs
2901 g / 28.5 N
17.40 kg / 38.37 lbs
~0 Gs
2 mm 17.95 kg / 39.57 lbs
5 535 Gs
2.69 kg / 5.93 lbs
2692 g / 26.4 N
16.15 kg / 35.61 lbs
~0 Gs
3 mm 16.52 kg / 36.42 lbs
5 310 Gs
2.48 kg / 5.46 lbs
2478 g / 24.3 N
14.87 kg / 32.78 lbs
~0 Gs
5 mm 13.69 kg / 30.18 lbs
4 834 Gs
2.05 kg / 4.53 lbs
2053 g / 20.1 N
12.32 kg / 27.16 lbs
~0 Gs
10 mm 7.75 kg / 17.09 lbs
3 637 Gs
1.16 kg / 2.56 lbs
1162 g / 11.4 N
6.97 kg / 15.38 lbs
~0 Gs
20 mm 2.06 kg / 4.55 lbs
1 877 Gs
0.31 kg / 0.68 lbs
310 g / 3.0 N
1.86 kg / 4.10 lbs
~0 Gs
50 mm 0.07 kg / 0.15 lbs
336 Gs
0.01 kg / 0.02 lbs
10 g / 0.1 N
0.06 kg / 0.13 lbs
~0 Gs
60 mm 0.03 kg / 0.06 lbs
217 Gs
0.00 kg / 0.01 lbs
4 g / 0.0 N
0.02 kg / 0.05 lbs
~0 Gs
70 mm 0.01 kg / 0.03 lbs
147 Gs
0.00 kg / 0.00 lbs
2 g / 0.0 N
0.01 kg / 0.03 lbs
~0 Gs
80 mm 0.01 kg / 0.01 lbs
104 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
90 mm 0.00 kg / 0.01 lbs
76 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
100 mm 0.00 kg / 0.00 lbs
57 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Safety (HSE) (electronics) - warnings
MW 22x6 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 9.5 cm
Hearing aid 10 Gs (1.0 mT) 7.5 cm
Mechanical watch 20 Gs (2.0 mT) 6.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 4.5 cm
Car key 50 Gs (5.0 mT) 4.5 cm
Payment card 400 Gs (40.0 mT) 2.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.5 cm

Table 8: Impact energy (cracking risk) - warning
MW 22x6 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 24.98 km/h
(6.94 m/s)
0.41 J
30 mm 40.82 km/h
(11.34 m/s)
1.10 J
50 mm 52.66 km/h
(14.63 m/s)
1.83 J
100 mm 74.47 km/h
(20.69 m/s)
3.66 J

Table 9: Corrosion resistance
MW 22x6 / 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 22x6 / N38

Parameter Value SI Unit / Description
Magnetic Flux 12 337 Mx 123.4 µWb
Pc Coefficient 0.37 Low (Flat)

Table 11: Underwater work (magnet fishing)
MW 22x6 / N38

Environment Effective steel pull Effect
Air (land) 9.33 kg Standard
Water (riverbed) 10.68 kg
(+1.35 kg buoyancy gain)
+14.5%
Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Sliding resistance

*Caution: On a vertical wall, the magnet retains only ~20% of its nominal pull.

2. Efficiency vs thickness

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

3. Heat tolerance

*For N38 grade, the safety limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.37

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%
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: 010047-2026
Measurement Calculator
Magnet pull force

Magnetic Field

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The offered product is an incredibly powerful rod magnet, produced from durable NdFeB material, which, with dimensions of Ø22x6 mm, guarantees the highest energy density. This specific item boasts a tolerance of ±0.1mm and industrial build quality, making it an excellent solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 9.33 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring lightning-fast order fulfillment. Additionally, its triple-layer 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 automation, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 91.51 N with a weight of only 17.11 g, this rod is indispensable in miniature devices and wherever every gram matters.
Due to the delicate structure of the ceramic sinter, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. To ensure stability in industry, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability 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 even stronger magnets in the same volume (Ø22x6), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 22 mm and height 6 mm. The value of 91.51 N means that the magnet is capable of holding a weight many times exceeding its own mass of 17.11 g. 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 22 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 as well as disadvantages of neodymium magnets.

Advantages

Apart from their superior magnetic energy, neodymium magnets have these key benefits:
  • They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (according to literature),
  • Magnets perfectly resist against demagnetization caused by ambient magnetic noise,
  • A magnet with a shiny gold surface has an effective appearance,
  • Magnetic induction on the working part of the magnet is maximum,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to freedom in designing and the ability to modify to individual projects,
  • Universal use in future technologies – they find application in mass storage devices, drive modules, medical devices, as well as industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which makes them useful in small systems

Disadvantages

Characteristics of disadvantages of neodymium magnets and ways of using them
  • They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only shields the magnet but also improves its resistance to damage
  • Neodymium magnets lose power 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
  • When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation as well as corrosion.
  • Limited possibility of producing nuts in the magnet and complex shapes - recommended is a housing - mounting mechanism.
  • Possible danger to health – tiny shards of magnets pose a threat, in case of ingestion, which gains importance in the context of child safety. It is also worth noting that tiny parts of these magnets are able to be problematic in diagnostics medical in case of swallowing.
  • With mass production the cost of neodymium magnets can be a barrier,

Pull force analysis

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

Information about lifting capacity was determined for the most favorable conditions, taking into account:
  • on a base made of structural steel, perfectly concentrating the magnetic field
  • with a thickness no less than 10 mm
  • with a surface free of scratches
  • with zero gap (no paint)
  • during pulling in a direction perpendicular to the mounting surface
  • in neutral thermal conditions

Practical aspects of lifting capacity – factors

In real-world applications, the actual holding force is determined by several key aspects, presented from crucial:
  • Air gap (betwixt the magnet and the metal), since even a tiny clearance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to paint, corrosion or dirt).
  • Angle of force application – maximum parameter is reached only during perpendicular pulling. The shear force of the magnet along the plate is typically many times lower (approx. 1/5 of the lifting capacity).
  • Metal thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
  • Metal type – different alloys attracts identically. Alloy additives worsen the interaction with the magnet.
  • Surface finish – ideal contact is obtained only on polished steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
  • Temperature – heating the magnet causes a temporary drop of force. Check the thermal limit for a given model.

Lifting capacity was assessed by applying a polished steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, in contrast under attempts to slide the magnet the holding force is lower. Moreover, even a slight gap between the magnet’s surface and the plate lowers the load capacity.

Safety rules for work with NdFeB magnets
Conscious usage

Before use, read the rules. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.

Compass and GPS

A strong magnetic field interferes with the operation of compasses in phones and navigation systems. Do not bring magnets close to a device to avoid breaking the sensors.

Swallowing risk

NdFeB magnets are not toys. Accidental ingestion of several magnets can lead to them connecting inside the digestive tract, which constitutes a direct threat to life and requires urgent medical intervention.

Data carriers

Intense magnetic fields can destroy records on payment cards, hard drives, and other magnetic media. Maintain a gap of min. 10 cm.

Medical implants

Health Alert: Neodymium magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.

Thermal limits

Watch the temperature. Exposing the magnet to high heat will destroy its properties and strength.

Dust explosion hazard

Dust generated during cutting of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.

Finger safety

Risk of injury: The pulling power is so immense that it can cause blood blisters, crushing, and broken bones. Use thick gloves.

Avoid contact if allergic

It is widely known that the nickel plating (standard magnet coating) is a common allergen. If you have an allergy, refrain from touching magnets with bare hands or opt for encased magnets.

Magnet fragility

Neodymium magnets are sintered ceramics, meaning they are prone to chipping. Clashing of two magnets leads to them breaking into small pieces.

Safety First! Looking for details? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98