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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

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6.11 ZŁ with VAT / pcs + price for transport

4.97 ZŁ net + 23% VAT / pcs

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Technical specification - 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

Physical analysis of the assembly - data

The following data are the outcome of a engineering calculation. Results are based on models for the material Nd2Fe14B. Actual conditions may differ from theoretical values. Use these calculations as a reference point during assembly planning.

Table 1: Static pull force (force 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 pounds
9330.0 g / 91.5 N
 strong
1 mm 2767 Gs
276.7 mT
 8.12 kg / 17.89 pounds
8116.0 g / 79.6 N
 strong
2 mm 2538 Gs
253.8 mT
 6.82 kg / 15.05 pounds
6824.4 g / 66.9 N
 strong
3 mm 2295 Gs
229.5 mT
 5.58 kg / 12.30 pounds
5580.8 g / 54.7 N
 strong
5 mm 1818 Gs
181.8 mT
 3.50 kg / 7.73 pounds
3504.7 g / 34.4 N
 strong
10 mm 938 Gs
93.8 mT
 0.93 kg / 2.06 pounds
933.4 g / 9.2 N
 safe
15 mm 492 Gs
49.2 mT
 0.26 kg / 0.57 pounds
257.0 g / 2.5 N
 safe
20 mm 277 Gs
27.7 mT
 0.08 kg / 0.18 pounds
81.6 g / 0.8 N
 safe
30 mm 108 Gs
10.8 mT
 0.01 kg / 0.03 pounds
12.4 g / 0.1 N
 safe
50 mm 29 Gs
2.9 mT
 0.00 kg / 0.00 pounds
0.9 g / 0.0 N
 safe
Magnetic force weakens sharply with every mm of spacing. Remember that even a very thin break (e.g., dirt, varnish, dust) significantly diminishes the holding power. Magnets operate strongest at the point of direct contact; gap drastically cuts the force. Observe how rapidly the pull force drop, when the magnet does not touch directly to the metal substrate. When planning the mounting, eliminate redundant distances.

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 pounds
1866.0 g / 18.3 N
1 mm Stal (~0.2) 1.62 kg / 3.58 pounds
1624.0 g / 15.9 N
2 mm Stal (~0.2) 1.36 kg / 3.01 pounds
1364.0 g / 13.4 N
3 mm Stal (~0.2) 1.12 kg / 2.46 pounds
1116.0 g / 10.9 N
5 mm Stal (~0.2) 0.70 kg / 1.54 pounds
700.0 g / 6.9 N
10 mm Stal (~0.2) 0.19 kg / 0.41 pounds
186.0 g / 1.8 N
15 mm Stal (~0.2) 0.05 kg / 0.11 pounds
52.0 g / 0.5 N
20 mm Stal (~0.2) 0.02 kg / 0.04 pounds
16.0 g / 0.2 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
The table below presents the approximate force required to start the slippage of the magnet downwards on a vertical steel plate (assuming typical friction). The holding force is a function of the separation distance between the magnet and the surface.

Table 3: Vertical assembly (sliding) - 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 pounds
2799.0 g / 27.5 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.87 kg / 4.11 pounds
1866.0 g / 18.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.93 kg / 2.06 pounds
933.0 g / 9.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
4.67 kg / 10.28 pounds
4665.0 g / 45.8 N
When placing a element on a vertical surface (e.g., a board), it will only hold barely approx. 1/5 of its nominal power. Gravity as well as a low friction coefficient mean that magnets slip easier than they pull off. Want to create a vertical fastening? Note that the sliding force is significantly lower than the perpendicular breakaway force. On a smooth steel, the magnet will slide down under a much lighter load. Application of an anti-slip coating can significantly raise the stability.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 22x6 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.93 kg / 2.06 pounds
933.0 g / 9.2 N
1 mm
25%
 2.33 kg / 5.14 pounds
2332.5 g / 22.9 N
2 mm
50%
 4.67 kg / 10.28 pounds
4665.0 g / 45.8 N
3 mm
75%
 7.00 kg / 15.43 pounds
6997.5 g / 68.6 N
5 mm
100%
 9.33 kg / 20.57 pounds
9330.0 g / 91.5 N
10 mm
100%
 9.33 kg / 20.57 pounds
9330.0 g / 91.5 N
11 mm
100%
 9.33 kg / 20.57 pounds
9330.0 g / 91.5 N
12 mm
100%
 9.33 kg / 20.57 pounds
9330.0 g / 91.5 N
A thin metal plate is incapable of focus the entire magnetic field, which wastes potential of the holder. If you mount a strong magnet to a weak sheet, the field will pass right through and the holding will be smaller. To achieve full efficiency of this magnet's power, you need a suitably thick backing of steel. The saturation effect causes that on thin elements (e.g., car bodies), the magnet holds weaker. We advise picking the steel thickness from these parameters.

Table 5: Thermal resistance (material behavior) - 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 pounds
9330.0 g / 91.5 N
 OK
40 °C -2.2% 9.12 kg / 20.12 pounds
9124.7 g / 89.5 N
 OK
60 °C -4.4% 8.92 kg / 19.66 pounds
8919.5 g / 87.5 N
80 °C -6.6% 8.71 kg / 19.21 pounds
8714.2 g / 85.5 N
100 °C -28.8% 6.64 kg / 14.65 pounds
6643.0 g / 65.2 N
Ordinary NdFeB products lose parameters past the thermal threshold. Watch out for overheating – heat can irreversibly destroy this product. With increasing heat, the neodymium's force momentarily drops. Refrain from using this magnet near heat sources exceeding its safe range. Ignoring the limit will result in destruction of magnetic properties.
*Important note: Heat tolerance depends not only on the material grade, as well as the dimension ratios. Low-profile magnets (low Pc) may lose charge permanently at lower temperatures compared to rod magnets. Warning indicator in the table points to permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 22x6 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 20.63 kg / 45.48 pounds
4 566 Gs
3.09 kg / 6.82 pounds
3095 g / 30.4 N
 N/A
1 mm 19.34 kg / 42.63 pounds
5 745 Gs
2.90 kg / 6.40 pounds
2901 g / 28.5 N
 17.40 kg / 38.37 pounds
~0 Gs
2 mm 17.95 kg / 39.57 pounds
5 535 Gs
2.69 kg / 5.93 pounds
2692 g / 26.4 N
 16.15 kg / 35.61 pounds
~0 Gs
3 mm 16.52 kg / 36.42 pounds
5 310 Gs
2.48 kg / 5.46 pounds
2478 g / 24.3 N
 14.87 kg / 32.78 pounds
~0 Gs
5 mm 13.69 kg / 30.18 pounds
4 834 Gs
2.05 kg / 4.53 pounds
2053 g / 20.1 N
 12.32 kg / 27.16 pounds
~0 Gs
10 mm 7.75 kg / 17.09 pounds
3 637 Gs
1.16 kg / 2.56 pounds
1162 g / 11.4 N
 6.97 kg / 15.38 pounds
~0 Gs
20 mm 2.06 kg / 4.55 pounds
1 877 Gs
0.31 kg / 0.68 pounds
310 g / 3.0 N
 1.86 kg / 4.10 pounds
~0 Gs
50 mm 0.07 kg / 0.15 pounds
336 Gs
0.01 kg / 0.02 pounds
10 g / 0.1 N
 0.06 kg / 0.13 pounds
~0 Gs
60 mm 0.03 kg / 0.06 pounds
217 Gs
0.00 kg / 0.01 pounds
4 g / 0.0 N
 0.02 kg / 0.05 pounds
~0 Gs
70 mm 0.01 kg / 0.03 pounds
147 Gs
0.00 kg / 0.00 pounds
2 g / 0.0 N
 0.01 kg / 0.03 pounds
~0 Gs
80 mm 0.01 kg / 0.01 pounds
104 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.01 pounds
76 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.00 pounds
57 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
Two strong neodymiums attract each other from a significantly greater distance than a neodymium and metal setup. Such a system of two magnets produces a massive flux and a further horizon of performance. Planning to create a strong closure? Utilize two neodymiums instead of a neodymium and a steel. Be careful that when attracting two neodymiums, the pinch force is extreme. The levitation is marginally weaker than the attraction, but still significant.
*The magnetic induction in repulsion mode drops to ~0 Gs at the geometric center of the gap (caused by magnetic field nullification).
Attention: Results show sliding force of two identical magnets (friction ~0.15 for Ni-Ni coating).

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
Timepiece 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
A strong magnetic field is a serious hazard to electronics as well as pacemakers. These magnets generate a field that prevents correct functioning of sensitive medical devices. Remember: the invisible magnetic field acts through matter and housings. Increased vigilance must be exercised by people with hearing aids and drug dispensers. Also at risk are: mechanical watches, car keys, membranes, and screens. Do not place the magnet near cards, HDD media, or sensitive navigation tools.

Table 8: Dynamics (kinetic energy) - 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
Magnetic elements are prone to chipping – a violent impact against metal risks their cracking. Pay attention to connection velocity – a magnet released freely speeds with massive force. Striking energy can cause material chips or painful pinches to skin. Always hold the magnet during bringing near metal so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h means shattering of the neodymium. Use safety goggles when handling with large magnets.

Table 9: Coating parameters (durability)
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)
For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Construction data (Flux)
MW 22x6 / N38

Parameter Value SI Unit / Description
Magnetic Flux 12 337 Mx 123.4 µWb
Pc Coefficient 0.37 Low (Flat)
Total magnetic flux emitted by the pole surface. Key data when building generators as well as sensors. The Pc coefficient defines the working geometry.

Table 11: Submerged application
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: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
In water, the magnet feels stronger thanks to Archimedes' principle. Buoyancy helps in lifting finds.
1. Wall mount (shear)

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

2. Plate thickness effect

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

3. Power loss vs temp

*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) = 0.37

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 specification and ecology
Chemical composition
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: 010047-2026
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The offered product is a very strong cylinder magnet, manufactured from modern NdFeB material, which, with dimensions of Ø22x6 mm, guarantees optimal power. This specific item features an accuracy of ±0.1mm and professional build quality, making it an ideal solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 9.33 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is created for building generators, advanced sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the high power of 91.51 N with a weight of only 17.11 g, this rod is indispensable in miniature devices 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., 22.1 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 durability of the connection.
Magnets N38 are suitable for 90% of applications in modeling and machine building, where excessive miniaturization with maximum force is not required. If you need the strongest 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 key parameter here is the lifting capacity amounting to approximately 9.33 kg (force ~91.51 N), which, with such compact dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface 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 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 diametrically if your project requires it.

Advantages as well as disadvantages of neodymium magnets.

Benefits

Besides their tremendous strength, neodymium magnets offer the following advantages:
  • They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (in laboratory conditions),
  • They have excellent resistance to magnetism drop when exposed to opposing magnetic fields,
  • In other words, due to the aesthetic layer of gold, the element becomes visually attractive,
  • Magnets possess very high magnetic induction on the active area,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
  • Thanks to the possibility of accurate molding and customization to unique requirements, magnetic components can be modeled in a wide range of geometric configurations, which makes them more universal,
  • Versatile presence in high-tech industry – they find application in data components, drive modules, precision medical tools, and complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which enables their usage in miniature devices

Weaknesses

Problematic aspects of neodymium magnets and proposals for their use:
  • At strong impacts they can break, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets decrease their power 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 advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
  • Limited ability of making threads in the magnet and complicated shapes - recommended is casing - magnet mounting.
  • Possible danger related to microscopic parts of magnets pose a threat, if swallowed, which is particularly important in the context of child safety. Furthermore, small components of these devices can disrupt the diagnostic process medical when they are in the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Pull force analysis

Detachment force of the magnet in optimal conditions – what contributes to it?

The declared magnet strength refers to the limit force, measured under ideal test conditions, specifically:
  • on a base made of mild steel, perfectly concentrating the magnetic flux
  • whose thickness is min. 10 mm
  • characterized by smoothness
  • without the slightest air gap between the magnet and steel
  • under vertical force vector (90-degree angle)
  • in neutral thermal conditions

Determinants of practical lifting force of a magnet

During everyday use, the actual holding force depends on several key aspects, ranked from the most important:
  • Distance (betwixt the magnet and the plate), since even a very small clearance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to varnish, corrosion or dirt).
  • Force direction – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet exhibits much less (typically approx. 20-30% of nominal force).
  • Element thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
  • Plate material – mild steel gives the best results. Alloy steels decrease magnetic properties and holding force.
  • Smoothness – full contact is obtained only on smooth steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
  • Temperature influence – high temperature weakens magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity testing was performed on a smooth plate of suitable thickness, under perpendicular forces, in contrast under shearing force the lifting capacity is smaller. Additionally, even a slight gap between the magnet and the plate reduces the lifting capacity.

Warnings
Power loss in heat

Monitor thermal conditions. Exposing the magnet to high heat will destroy its properties and pulling force.

Cards and drives

Intense magnetic fields can corrupt files on credit cards, hard drives, and other magnetic media. Maintain a gap of min. 10 cm.

Metal Allergy

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If redness appears, cease handling magnets and use protective gear.

Shattering risk

Watch out for shards. Magnets can fracture upon uncontrolled impact, ejecting shards into the air. Eye protection is mandatory.

GPS Danger

A powerful magnetic field negatively affects the operation of magnetometers in phones and navigation systems. Maintain magnets close to a smartphone to prevent damaging the sensors.

Bodily injuries

Protect your hands. Two powerful magnets will join immediately with a force of massive weight, destroying anything in their path. Exercise extreme caution!

Choking Hazard

Always store magnets away from children. Choking hazard is significant, and the consequences of magnets clamping inside the body are fatal.

ICD Warning

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

Do not drill into magnets

Powder produced during cutting of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.

Handling guide

Exercise caution. Neodymium magnets act from a long distance and snap with huge force, often quicker than you can move away.

Attention! Want to know more? Check our post: Why are neodymium magnets dangerous?