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MP 22x6x10 / N38 - ring magnet

ring magnet

Catalog no 030394

GTIN/EAN: 5906301812319

5.00

Diameter

22 mm [±0,1 mm]

internal diameter Ø

6 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

26.39 g

Magnetization Direction

↑ axial

Load capacity

13.65 kg / 133.89 N

Magnetic Induction

416.85 mT / 4168 Gs

Coating

[NiCuNi] Nickel

13.95 with VAT / pcs + price for transport

11.34 ZŁ net + 23% VAT / pcs

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Technical specification of the product - MP 22x6x10 / N38 - ring magnet

Specification / characteristics - MP 22x6x10 / N38 - ring magnet

properties
properties values
Cat. no. 030394
GTIN/EAN 5906301812319
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 22 mm [±0,1 mm]
internal diameter Ø 6 mm [±0,1 mm]
Height 10 mm [±0,1 mm]
Weight 26.39 g
Magnetization Direction ↑ axial
Load capacity ~ ? 13.65 kg / 133.89 N
Magnetic Induction ~ ? 416.85 mT / 4168 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 22x6x10 / N38 - ring 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 - report

The following values are the result of a engineering simulation. Results are based on algorithms for the material Nd2Fe14B. Operational conditions might slightly differ from theoretical values. Use these data as a reference point when designing systems.

Table 1: Static pull force (pull vs distance) - characteristics
MP 22x6x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5864 Gs
586.4 mT
13.65 kg / 30.09 lbs
13650.0 g / 133.9 N
dangerous!
1 mm 5326 Gs
532.6 mT
11.26 kg / 24.83 lbs
11261.1 g / 110.5 N
dangerous!
2 mm 4795 Gs
479.5 mT
9.13 kg / 20.12 lbs
9127.3 g / 89.5 N
medium risk
3 mm 4288 Gs
428.8 mT
7.30 kg / 16.09 lbs
7299.8 g / 71.6 N
medium risk
5 mm 3381 Gs
338.1 mT
4.54 kg / 10.01 lbs
4539.0 g / 44.5 N
medium risk
10 mm 1830 Gs
183.0 mT
1.33 kg / 2.93 lbs
1329.4 g / 13.0 N
weak grip
15 mm 1039 Gs
103.9 mT
0.43 kg / 0.95 lbs
428.7 g / 4.2 N
weak grip
20 mm 635 Gs
63.5 mT
0.16 kg / 0.35 lbs
159.9 g / 1.6 N
weak grip
30 mm 285 Gs
28.5 mT
0.03 kg / 0.07 lbs
32.1 g / 0.3 N
weak grip
50 mm 90 Gs
9.0 mT
0.00 kg / 0.01 lbs
3.2 g / 0.0 N
weak grip

Table 2: Slippage force (wall)
MP 22x6x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 2.73 kg / 6.02 lbs
2730.0 g / 26.8 N
1 mm Stal (~0.2) 2.25 kg / 4.96 lbs
2252.0 g / 22.1 N
2 mm Stal (~0.2) 1.83 kg / 4.03 lbs
1826.0 g / 17.9 N
3 mm Stal (~0.2) 1.46 kg / 3.22 lbs
1460.0 g / 14.3 N
5 mm Stal (~0.2) 0.91 kg / 2.00 lbs
908.0 g / 8.9 N
10 mm Stal (~0.2) 0.27 kg / 0.59 lbs
266.0 g / 2.6 N
15 mm Stal (~0.2) 0.09 kg / 0.19 lbs
86.0 g / 0.8 N
20 mm Stal (~0.2) 0.03 kg / 0.07 lbs
32.0 g / 0.3 N
30 mm Stal (~0.2) 0.01 kg / 0.01 lbs
6.0 g / 0.1 N
50 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N

Table 3: Wall mounting (sliding) - vertical pull
MP 22x6x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
4.10 kg / 9.03 lbs
4095.0 g / 40.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
2.73 kg / 6.02 lbs
2730.0 g / 26.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.37 kg / 3.01 lbs
1365.0 g / 13.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
6.83 kg / 15.05 lbs
6825.0 g / 67.0 N

Table 4: Steel thickness (saturation) - power losses
MP 22x6x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
0.68 kg / 1.50 lbs
682.5 g / 6.7 N
1 mm
13%
1.71 kg / 3.76 lbs
1706.3 g / 16.7 N
2 mm
25%
3.41 kg / 7.52 lbs
3412.5 g / 33.5 N
3 mm
38%
5.12 kg / 11.28 lbs
5118.8 g / 50.2 N
5 mm
63%
8.53 kg / 18.81 lbs
8531.3 g / 83.7 N
10 mm
100%
13.65 kg / 30.09 lbs
13650.0 g / 133.9 N
11 mm
100%
13.65 kg / 30.09 lbs
13650.0 g / 133.9 N
12 mm
100%
13.65 kg / 30.09 lbs
13650.0 g / 133.9 N

Table 5: Thermal stability (material behavior) - resistance threshold
MP 22x6x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 13.65 kg / 30.09 lbs
13650.0 g / 133.9 N
OK
40 °C -2.2% 13.35 kg / 29.43 lbs
13349.7 g / 131.0 N
OK
60 °C -4.4% 13.05 kg / 28.77 lbs
13049.4 g / 128.0 N
OK
80 °C -6.6% 12.75 kg / 28.11 lbs
12749.1 g / 125.1 N
100 °C -28.8% 9.72 kg / 21.43 lbs
9718.8 g / 95.3 N

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MP 22x6x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 54.34 kg / 119.79 lbs
6 106 Gs
8.15 kg / 17.97 lbs
8151 g / 80.0 N
N/A
1 mm 49.50 kg / 109.14 lbs
11 193 Gs
7.43 kg / 16.37 lbs
7426 g / 72.8 N
44.55 kg / 98.22 lbs
~0 Gs
2 mm 44.83 kg / 98.83 lbs
10 652 Gs
6.72 kg / 14.82 lbs
6724 g / 66.0 N
40.34 kg / 88.94 lbs
~0 Gs
3 mm 40.43 kg / 89.14 lbs
10 116 Gs
6.06 kg / 13.37 lbs
6065 g / 59.5 N
36.39 kg / 80.22 lbs
~0 Gs
5 mm 32.54 kg / 71.74 lbs
9 075 Gs
4.88 kg / 10.76 lbs
4881 g / 47.9 N
29.29 kg / 64.57 lbs
~0 Gs
10 mm 18.07 kg / 39.83 lbs
6 762 Gs
2.71 kg / 5.98 lbs
2710 g / 26.6 N
16.26 kg / 35.85 lbs
~0 Gs
20 mm 5.29 kg / 11.67 lbs
3 660 Gs
0.79 kg / 1.75 lbs
794 g / 7.8 N
4.76 kg / 10.50 lbs
~0 Gs
50 mm 0.27 kg / 0.60 lbs
828 Gs
0.04 kg / 0.09 lbs
41 g / 0.4 N
0.24 kg / 0.54 lbs
~0 Gs
60 mm 0.13 kg / 0.28 lbs
569 Gs
0.02 kg / 0.04 lbs
19 g / 0.2 N
0.12 kg / 0.25 lbs
~0 Gs
70 mm 0.07 kg / 0.15 lbs
408 Gs
0.01 kg / 0.02 lbs
10 g / 0.1 N
0.06 kg / 0.13 lbs
~0 Gs
80 mm 0.04 kg / 0.08 lbs
303 Gs
0.01 kg / 0.01 lbs
5 g / 0.1 N
0.03 kg / 0.07 lbs
~0 Gs
90 mm 0.02 kg / 0.05 lbs
231 Gs
0.00 kg / 0.01 lbs
3 g / 0.0 N
0.02 kg / 0.04 lbs
~0 Gs
100 mm 0.01 kg / 0.03 lbs
180 Gs
0.00 kg / 0.00 lbs
2 g / 0.0 N
0.01 kg / 0.03 lbs
~0 Gs

Table 7: Protective zones (implants) - precautionary measures
MP 22x6x10 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 15.5 cm
Hearing aid 10 Gs (1.0 mT) 12.0 cm
Timepiece 20 Gs (2.0 mT) 9.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 7.0 cm
Car key 50 Gs (5.0 mT) 6.5 cm
Payment card 400 Gs (40.0 mT) 3.0 cm
HDD hard drive 600 Gs (60.0 mT) 2.5 cm

Table 8: Impact energy (kinetic energy) - collision effects
MP 22x6x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 24.29 km/h
(6.75 m/s)
0.60 J
30 mm 39.79 km/h
(11.05 m/s)
1.61 J
50 mm 51.30 km/h
(14.25 m/s)
2.68 J
100 mm 72.53 km/h
(20.15 m/s)
5.36 J

Table 9: Anti-corrosion coating durability
MP 22x6x10 / 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 (Flux)
MP 22x6x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 16 465 Mx 164.7 µWb
Pc Coefficient 1.13 High (Stable)

Table 11: Submerged application
MP 22x6x10 / N38

Environment Effective steel pull Effect
Air (land) 13.65 kg Standard
Water (riverbed) 15.63 kg
(+1.98 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. Vertical hold

*Caution: On a vertical wall, the magnet retains merely approx. 20-30% of its nominal pull.

2. Efficiency vs thickness

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

3. Temperature resistance

*For standard magnets, the safety limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.13

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
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: 030394-2026
Measurement Calculator
Force (pull)

Magnetic Induction

Other offers

It is ideally suited for places where solid attachment of the magnet to the substrate is required without the risk of detachment. Thanks to the hole (often for a screw), this model enables quick installation to wood, wall, plastic, or metal. This product with a force of 13.65 kg works great as a cabinet closure, speaker holder, or spacer element in devices.
This is a crucial issue when working with model MP 22x6x10 / N38. Neodymium magnets are sintered ceramics, which means they are very brittle and inelastic. One turn too many can destroy the magnet, so do it slowly. The flat screw head should evenly press the magnet. Remember: cracking during assembly results from material properties, not a product defect.
Moisture can penetrate micro-cracks in the coating and cause oxidation of the magnet. In the place of the mounting hole, the coating is thinner and easily scratched when tightening the screw, which will become a corrosion focus. If you must use it outside, paint it with anti-corrosion paint after mounting.
A screw or bolt with a thread diameter smaller than 6 mm fits this model. If the magnet does not have a chamfer (cone), we recommend using a screw with a flat or cylindrical head, or possibly using a washer. Always check that the screw head is not larger than the outer diameter of the magnet (22 mm), so it doesn't protrude beyond the outline.
The presented product is a ring magnet with dimensions Ø22 mm (outer diameter) and height 10 mm. The key parameter here is the lifting capacity amounting to approximately 13.65 kg (force ~133.89 N). The mounting hole diameter is precisely 6 mm.
These magnets are magnetized axially (through the thickness), which means one flat side is the N pole and the other is S. In the case of connecting two rings, make sure one is turned the right way. When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Strengths as well as weaknesses of rare earth magnets.

Strengths

Besides their remarkable strength, neodymium magnets offer the following advantages:
  • They retain attractive force for around ten years – the loss is just ~1% (according to analyses),
  • They show high resistance to demagnetization induced by presence of other magnetic fields,
  • In other words, due to the metallic layer of gold, the element gains a professional look,
  • Magnets are distinguished by excellent magnetic induction on the outer side,
  • Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
  • Due to the possibility of flexible forming and adaptation to specialized projects, neodymium magnets can be manufactured in a variety of shapes and sizes, which increases their versatility,
  • Versatile presence in innovative solutions – they are used in data components, motor assemblies, advanced medical instruments, also technologically advanced constructions.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Cons

What to avoid - cons of neodymium magnets and ways of using them
  • They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Limited possibility of creating threads in the magnet and complicated forms - preferred is cover - magnetic holder.
  • Potential hazard resulting from small fragments of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, small elements of these products are able to be problematic in diagnostics 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

Lifting parameters

Maximum lifting force for a neodymium magnet – what affects it?

The lifting capacity listed is a result of laboratory testing performed under specific, ideal conditions:
  • using a plate made of low-carbon steel, acting as a circuit closing element
  • possessing a massiveness of minimum 10 mm to avoid saturation
  • with a surface free of scratches
  • under conditions of no distance (metal-to-metal)
  • during pulling in a direction perpendicular to the plane
  • at room temperature

Practical lifting capacity: influencing factors

It is worth knowing that the application force will differ influenced by the following factors, starting with the most relevant:
  • Distance – existence of any layer (rust, dirt, air) acts as an insulator, which reduces capacity rapidly (even by 50% at 0.5 mm).
  • Force direction – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet holds significantly lower power (often approx. 20-30% of maximum force).
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
  • Plate material – mild steel gives the best results. Alloy admixtures lower magnetic permeability and holding force.
  • Base smoothness – the more even the plate, the better the adhesion and stronger the hold. Unevenness creates an air distance.
  • Thermal environment – heating the magnet causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.

Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under attempts to slide the magnet the lifting capacity is smaller. In addition, even a slight gap between the magnet and the plate lowers the lifting capacity.

Warnings
Warning for heart patients

For implant holders: Strong magnetic fields affect electronics. Maintain at least 30 cm distance or ask another person to work with the magnets.

Fire warning

Machining of neodymium magnets carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Danger to the youngest

Absolutely keep magnets out of reach of children. Ingestion danger is significant, and the consequences of magnets connecting inside the body are life-threatening.

Skin irritation risks

A percentage of the population experience a contact allergy to Ni, which is the typical protective layer for NdFeB magnets. Extended handling might lead to a rash. We strongly advise use protective gloves.

Beware of splinters

Beware of splinters. Magnets can explode upon uncontrolled impact, ejecting shards into the air. Eye protection is mandatory.

Caution required

Before use, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.

Maximum temperature

Regular neodymium magnets (grade N) lose power when the temperature goes above 80°C. The loss of strength is permanent.

Precision electronics

Remember: neodymium magnets produce a field that disrupts precision electronics. Maintain a separation from your mobile, device, and navigation systems.

Crushing force

Big blocks can smash fingers instantly. Do not place your hand between two attracting surfaces.

Protect data

Data protection: Strong magnets can damage payment cards and sensitive devices (pacemakers, medical aids, mechanical watches).

Safety First! Learn more about hazards in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98