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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

Physical modeling of the product - technical parameters

These values represent the direct effect of a physical calculation. Results were calculated on algorithms for the material Nd2Fe14B. Operational performance might slightly differ. Treat these data as a preliminary roadmap during assembly planning.

Table 1: Static force (pull vs distance) - power drop
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
critical level
1 mm 5326 Gs
532.6 mT
11.26 kg / 24.83 lbs
11261.1 g / 110.5 N
critical level
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
low risk
15 mm 1039 Gs
103.9 mT
0.43 kg / 0.95 lbs
428.7 g / 4.2 N
low risk
20 mm 635 Gs
63.5 mT
0.16 kg / 0.35 lbs
159.9 g / 1.6 N
low risk
30 mm 285 Gs
28.5 mT
0.03 kg / 0.07 lbs
32.1 g / 0.3 N
low risk
50 mm 90 Gs
9.0 mT
0.00 kg / 0.01 lbs
3.2 g / 0.0 N
low risk

Table 2: Shear load (vertical surface)
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 (shearing) - behavior on slippery surfaces
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: Material efficiency (substrate influence) - 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 (stability) - power drop
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 (attraction) - field collision
MP 22x6x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (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 (electronics) - 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
Remote 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: Collisions (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: Coating parameters (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 (Pc)
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: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Wall mount (shear)

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

2. Plate thickness effect

*Thin metal sheet (e.g. 0.5mm PC case) severely limits the holding force.

3. Heat tolerance

*For standard magnets, the max working temp 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.

Engineering data and GPSR
Elemental analysis
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: 030394-2026
Measurement Calculator
Force (pull)

Field Strength

Other proposals

The ring-shaped magnet MP 22x6x10 / N38 is created for mechanical fastening, where glue might fail or be insufficient. Mounting is clean and reversible, unlike gluing. This product with a force of 13.65 kg works great as a door latch, speaker holder, or spacer element in devices.
This material behaves more like porcelain than steel, so it doesn't forgive mistakes during mounting. 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. Damage to the protective layer during assembly is the most common cause of rusting. This product is dedicated for inside building use. For outdoor applications, we recommend choosing magnets in hermetic housing or additional protection with varnish.
The inner hole diameter determines the maximum size of the mounting element. For magnets with a straight hole, a conical head can act like a wedge and burst the magnet. 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.
This model is characterized by dimensions Ø22x10 mm and a weight of 26.39 g. The pulling force of this model is an impressive 13.65 kg, which translates to 133.89 N in newtons. The mounting hole diameter is precisely 6 mm.
The poles are located on the planes with holes, not on the sides of the ring. In the case of connecting two rings, make sure one is turned the right way. We do not offer paired sets with marked poles in this category, but they are easy to match manually.

Advantages and disadvantages of neodymium magnets.

Strengths

Apart from their superior power, neodymium magnets have these key benefits:
  • Their strength is maintained, and after around ten years it decreases only by ~1% (according to research),
  • They do not lose their magnetic properties even under external field action,
  • In other words, due to the smooth finish of gold, the element is aesthetically pleasing,
  • Magnets are characterized by exceptionally strong magnetic induction on the outer layer,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Thanks to modularity in designing and the capacity to modify to individual projects,
  • Fundamental importance in high-tech industry – they are commonly used in mass storage devices, brushless drives, medical devices, as well as industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which allows their use in small systems

Limitations

Disadvantages of NdFeB magnets:
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a steel housing, which not only secures them against impacts but also raises their durability
  • When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their power 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
  • Magnets exposed to a humid environment can rust. Therefore when using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • We suggest casing - magnetic mount, due to difficulties in producing nuts inside the magnet and complicated forms.
  • Health risk to health – tiny shards of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. Additionally, small elements of these devices are able to be problematic in diagnostics medical in case of swallowing.
  • With budget limitations the cost of neodymium magnets can be a barrier,

Pull force analysis

Optimal lifting capacity of a neodymium magnetwhat contributes to it?

The declared magnet strength refers to the maximum value, obtained under optimal environment, specifically:
  • with the use of a yoke made of low-carbon steel, ensuring full magnetic saturation
  • with a cross-section of at least 10 mm
  • with an ground touching surface
  • with direct contact (without coatings)
  • during detachment in a direction perpendicular to the plane
  • at temperature room level

Determinants of lifting force in real conditions

It is worth knowing that the application force may be lower depending on elements below, starting with the most relevant:
  • Distance – the presence of any layer (rust, dirt, air) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the nominal value.
  • Element thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
  • Material type – the best choice is high-permeability steel. Cast iron may attract less.
  • Smoothness – full contact is possible only on polished steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Thermal environment – temperature increase results in weakening of force. Check the maximum operating temperature for a given model.

Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate lowers the load capacity.

H&S for magnets
Risk of cracking

Beware of splinters. Magnets can fracture upon violent connection, ejecting shards into the air. Eye protection is mandatory.

Threat to electronics

Do not bring magnets close to a wallet, computer, or screen. The magnetic field can irreversibly ruin these devices and erase data from cards.

Heat sensitivity

Avoid heat. NdFeB magnets are susceptible to heat. If you need resistance above 80°C, inquire about HT versions (H, SH, UH).

Swallowing risk

Strictly store magnets out of reach of children. Choking hazard is significant, and the effects of magnets connecting inside the body are life-threatening.

Dust explosion hazard

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

Threat to navigation

An intense magnetic field disrupts the operation of magnetometers in phones and navigation systems. Do not bring magnets close to a smartphone to avoid breaking the sensors.

Sensitization to coating

Certain individuals suffer from a contact allergy to Ni, which is the typical protective layer for NdFeB magnets. Prolonged contact may cause a rash. It is best to use safety gloves.

Pinching danger

Big blocks can smash fingers instantly. Never place your hand betwixt two strong magnets.

Life threat

For implant holders: Strong magnetic fields affect medical devices. Keep at least 30 cm distance or ask another person to handle the magnets.

Do not underestimate power

Before use, read the rules. Sudden snapping can destroy the magnet or injure your hand. Be predictive.

Safety First! Want to know more? Check our post: Are neodymium magnets dangerous?