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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 data 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 modeling of the product - data

Presented data constitute the direct effect of a engineering simulation. Results rely on algorithms for the class Nd2Fe14B. Real-world parameters might slightly deviate from the simulation results. Treat these data as a preliminary roadmap when designing systems.

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 pounds
13650.0 g / 133.9 N
crushing
1 mm 5326 Gs
532.6 mT
11.26 kg / 24.83 pounds
11261.1 g / 110.5 N
crushing
2 mm 4795 Gs
479.5 mT
9.13 kg / 20.12 pounds
9127.3 g / 89.5 N
medium risk
3 mm 4288 Gs
428.8 mT
7.30 kg / 16.09 pounds
7299.8 g / 71.6 N
medium risk
5 mm 3381 Gs
338.1 mT
4.54 kg / 10.01 pounds
4539.0 g / 44.5 N
medium risk
10 mm 1830 Gs
183.0 mT
1.33 kg / 2.93 pounds
1329.4 g / 13.0 N
safe
15 mm 1039 Gs
103.9 mT
0.43 kg / 0.95 pounds
428.7 g / 4.2 N
safe
20 mm 635 Gs
63.5 mT
0.16 kg / 0.35 pounds
159.9 g / 1.6 N
safe
30 mm 285 Gs
28.5 mT
0.03 kg / 0.07 pounds
32.1 g / 0.3 N
safe
50 mm 90 Gs
9.0 mT
0.00 kg / 0.01 pounds
3.2 g / 0.0 N
safe

Table 2: Sliding hold (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 pounds
2730.0 g / 26.8 N
1 mm Stal (~0.2) 2.25 kg / 4.96 pounds
2252.0 g / 22.1 N
2 mm Stal (~0.2) 1.83 kg / 4.03 pounds
1826.0 g / 17.9 N
3 mm Stal (~0.2) 1.46 kg / 3.22 pounds
1460.0 g / 14.3 N
5 mm Stal (~0.2) 0.91 kg / 2.00 pounds
908.0 g / 8.9 N
10 mm Stal (~0.2) 0.27 kg / 0.59 pounds
266.0 g / 2.6 N
15 mm Stal (~0.2) 0.09 kg / 0.19 pounds
86.0 g / 0.8 N
20 mm Stal (~0.2) 0.03 kg / 0.07 pounds
32.0 g / 0.3 N
30 mm Stal (~0.2) 0.01 kg / 0.01 pounds
6.0 g / 0.1 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N

Table 3: Wall mounting (sliding) - 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 pounds
4095.0 g / 40.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
2.73 kg / 6.02 pounds
2730.0 g / 26.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.37 kg / 3.01 pounds
1365.0 g / 13.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
6.83 kg / 15.05 pounds
6825.0 g / 67.0 N

Table 4: Material efficiency (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 pounds
682.5 g / 6.7 N
1 mm
13%
1.71 kg / 3.76 pounds
1706.3 g / 16.7 N
2 mm
25%
3.41 kg / 7.52 pounds
3412.5 g / 33.5 N
3 mm
38%
5.12 kg / 11.28 pounds
5118.8 g / 50.2 N
5 mm
63%
8.53 kg / 18.81 pounds
8531.3 g / 83.7 N
10 mm
100%
13.65 kg / 30.09 pounds
13650.0 g / 133.9 N
11 mm
100%
13.65 kg / 30.09 pounds
13650.0 g / 133.9 N
12 mm
100%
13.65 kg / 30.09 pounds
13650.0 g / 133.9 N

Table 5: Thermal resistance (material behavior) - 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 pounds
13650.0 g / 133.9 N
OK
40 °C -2.2% 13.35 kg / 29.43 pounds
13349.7 g / 131.0 N
OK
60 °C -4.4% 13.05 kg / 28.77 pounds
13049.4 g / 128.0 N
OK
80 °C -6.6% 12.75 kg / 28.11 pounds
12749.1 g / 125.1 N
100 °C -28.8% 9.72 kg / 21.43 pounds
9718.8 g / 95.3 N

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

Table 7: Hazards (implants) - warnings
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
Mechanical watch 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: Surface protection spec
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: Electrical 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%
Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Shear force

*Note: On a vertical surface, the magnet retains only approx. 20-30% of its perpendicular strength.

2. Efficiency vs thickness

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

3. Temperature resistance

*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.

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%
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
Quick Unit Converter
Pulling force

Field Strength

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The ring magnet with a hole MP 22x6x10 / N38 is created for permanent mounting, where glue might fail or be insufficient. Mounting is clean and reversible, unlike gluing. It is also often used in advertising for fixing signs and in workshops for organizing tools.
This material behaves more like porcelain than steel, so it doesn't forgive mistakes during mounting. When tightening the screw, you must maintain great sensitivity. We recommend tightening manually with a screwdriver, not an impact driver, because too much pressure will cause the ring to crack. It's a good idea to use a rubber spacer under the screw head, which will cushion the stresses. Remember: cracking during assembly results from material properties, not a product defect.
These magnets are coated with standard Ni-Cu-Ni plating, which protects them in indoor conditions, but is not sufficient for rain. Damage to the protective layer during assembly is the most common cause of rusting. This product is dedicated for indoor use. For outdoor applications, we recommend choosing rubberized holders or additional protection with varnish.
The inner hole diameter determines the maximum size of the mounting element. 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. Aesthetic mounting requires selecting the appropriate head size.
This model is characterized by dimensions Ø22x10 mm and a weight of 26.39 g. The key parameter here is the holding force amounting to approximately 13.65 kg (force ~133.89 N). The mounting hole diameter is precisely 6 mm.
The poles are located on the planes with holes, not on the sides of the ring. If you want two such magnets screwed with cones facing each other (faces) to attract, you must connect them with opposite poles (N to S). We do not offer paired sets with marked poles in this category, but they are easy to match manually.

Strengths as well as weaknesses of Nd2Fe14B magnets.

Benefits

Apart from their notable magnetism, neodymium magnets have these key benefits:
  • They retain full power for almost ten years – the loss is just ~1% (according to analyses),
  • They show high resistance to demagnetization induced by external disturbances,
  • By covering with a decorative layer of nickel, the element has an proper look,
  • Neodymium magnets deliver maximum magnetic induction on a small area, which allows for strong attraction,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Considering the ability of precise molding and customization to specialized requirements, magnetic components can be created in a broad palette of shapes and sizes, which makes them more universal,
  • Key role in future technologies – they are commonly used in hard drives, electric drive systems, precision medical tools, and industrial machines.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages

Disadvantages of neodymium magnets:
  • To avoid cracks under impact, we suggest using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 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, in case of application outdoors
  • Due to limitations in creating threads and complex shapes in magnets, we recommend using a housing - magnetic mount.
  • Potential hazard related to microscopic parts of magnets can be dangerous, in case of ingestion, which gains importance in the aspect of protecting the youngest. Additionally, small components of these magnets can be problematic in diagnostics medical in case of swallowing.
  • With mass production the cost of neodymium magnets is economically unviable,

Lifting parameters

Best holding force of the magnet in ideal parameterswhat it depends on?

Holding force of 13.65 kg is a theoretical maximum value conducted under standard conditions:
  • with the use of a yoke made of special test steel, guaranteeing full magnetic saturation
  • whose transverse dimension is min. 10 mm
  • with a plane free of scratches
  • without any air gap between the magnet and steel
  • for force applied at a right angle (pull-off, not shear)
  • in temp. approx. 20°C

Practical lifting capacity: influencing factors

Please note that the working load may be lower influenced by elements below, in order of importance:
  • Clearance – existence of any layer (paint, tape, air) acts as an insulator, which reduces capacity rapidly (even by 50% at 0.5 mm).
  • Angle of force application – maximum parameter is available only during perpendicular pulling. The resistance to sliding of the magnet along the surface is standardly several times smaller (approx. 1/5 of the lifting capacity).
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
  • Material type – the best choice is high-permeability steel. Cast iron may attract less.
  • Surface finish – full contact is possible only on polished steel. Any scratches and bumps create air cushions, reducing force.
  • Temperature influence – hot environment weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the load capacity is reduced by as much as 75%. Moreover, even a minimal clearance between the magnet’s surface and the plate reduces the load capacity.

Safe handling of NdFeB magnets
Compass and GPS

Be aware: neodymium magnets generate a field that interferes with sensitive sensors. Maintain a safe distance from your phone, device, and navigation systems.

This is not a toy

Neodymium magnets are not toys. Swallowing several magnets can lead to them pinching intestinal walls, which poses a critical condition and requires immediate surgery.

Fragile material

Beware of splinters. Magnets can explode upon violent connection, ejecting sharp fragments into the air. We recommend safety glasses.

Fire risk

Dust generated during machining of magnets is combustible. Do not drill into magnets unless you are an expert.

Nickel coating and allergies

Certain individuals have a contact allergy to Ni, which is the typical protective layer for neodymium magnets. Extended handling may cause skin redness. It is best to use protective gloves.

Maximum temperature

Control the heat. Exposing the magnet to high heat will permanently weaken its properties and pulling force.

Medical interference

Medical warning: Strong magnets can deactivate pacemakers and defibrillators. Do not approach if you have medical devices.

Pinching danger

Watch your fingers. Two powerful magnets will snap together instantly with a force of massive weight, crushing anything in their path. Exercise extreme caution!

Data carriers

Powerful magnetic fields can erase data on credit cards, hard drives, and storage devices. Keep a distance of at least 10 cm.

Handling guide

Use magnets consciously. Their powerful strength can shock even professionals. Stay alert and do not underestimate their force.

Safety First! More info about hazards in the article: Safety of working with magnets.