MP 22x6x10 / N38 - ring magnet
ring magnet
Catalog no 030394
GTIN/EAN: 5906301812319
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 ZŁ with VAT / pcs + price for transport
11.34 ZŁ net + 23% VAT / pcs
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Technical - MP 22x6x10 / N38 - ring magnet
Specification / characteristics - MP 22x6x10 / N38 - ring magnet
| properties | values |
|---|---|
| Cat. no. | 030394 |
| GTIN/EAN | 5906301812319 |
| Production/Distribution | Dhit sp. z o.o. |
| 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
| 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
| 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 simulation of the assembly - technical parameters
These values represent the result of a engineering simulation. Results were calculated on algorithms for the material Nd2Fe14B. Real-world performance might slightly deviate from the simulation results. Please consider these calculations as a preliminary roadmap for designers.
Table 1: Static 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
|
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
|
warning |
| 3 mm |
4288 Gs
428.8 mT
|
7.30 kg / 16.09 LBS
7299.8 g / 71.6 N
|
warning |
| 5 mm |
3381 Gs
338.1 mT
|
4.54 kg / 10.01 LBS
4539.0 g / 44.5 N
|
warning |
| 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: Vertical 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: Vertical assembly (shearing) - 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: Material efficiency (substrate influence) - power losses
MP 22x6x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.68 kg / 1.50 LBS
682.5 g / 6.7 N
|
| 1 mm |
|
1.71 kg / 3.76 LBS
1706.3 g / 16.7 N
|
| 2 mm |
|
3.41 kg / 7.52 LBS
3412.5 g / 33.5 N
|
| 3 mm |
|
5.12 kg / 11.28 LBS
5118.8 g / 50.2 N
|
| 5 mm |
|
8.53 kg / 18.81 LBS
8531.3 g / 83.7 N
|
| 10 mm |
|
13.65 kg / 30.09 LBS
13650.0 g / 133.9 N
|
| 11 mm |
|
13.65 kg / 30.09 LBS
13650.0 g / 133.9 N
|
| 12 mm |
|
13.65 kg / 30.09 LBS
13650.0 g / 133.9 N
|
Table 5: Thermal stability (material behavior) - thermal limit
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: Two magnets (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) - 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: 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: 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 (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% |
1. Shear force
*Warning: On a vertical wall, the magnet holds only a fraction of its nominal pull.
2. Plate thickness effect
*Thin steel (e.g. 0.5mm PC case) significantly reduces 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) = 1.13
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.
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other deals
Strengths and weaknesses of rare earth magnets.
Benefits
- They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (according to literature),
- Magnets effectively protect themselves against demagnetization caused by foreign field sources,
- In other words, due to the aesthetic finish of gold, the element gains a professional look,
- Magnets exhibit impressive magnetic induction on the surface,
- Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures approaching 230°C and above...
- Thanks to versatility in shaping and the ability to adapt to specific needs,
- Significant place in advanced technology sectors – they are used in mass storage devices, electric drive systems, medical equipment, and industrial machines.
- Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,
Cons
- At very strong impacts they can break, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
- When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
- We recommend cover - magnetic holder, due to difficulties in realizing threads inside the magnet and complex forms.
- Potential hazard related to microscopic parts of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, small elements of these devices are able to complicate diagnosis medical after entering the body.
- Due to expensive raw materials, their price is relatively high,
Lifting parameters
Magnetic strength at its maximum – what contributes to it?
- with the application of a yoke made of low-carbon steel, ensuring full magnetic saturation
- possessing a thickness of min. 10 mm to avoid saturation
- with an polished touching surface
- with direct contact (without coatings)
- during detachment in a direction vertical to the plane
- at standard ambient temperature
Determinants of lifting force in real conditions
- Distance – existence of foreign body (paint, dirt, gap) acts as an insulator, which reduces power steeply (even by 50% at 0.5 mm).
- Angle of force application – maximum parameter is reached only during perpendicular pulling. The resistance to sliding of the magnet along the surface is usually many times smaller (approx. 1/5 of the lifting capacity).
- Element thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
- Steel type – mild steel attracts best. Alloy steels lower magnetic properties and holding force.
- Plate texture – ground elements guarantee perfect abutment, which improves force. Uneven metal reduce efficiency.
- Heat – NdFeB sinters have a sensitivity to temperature. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).
Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under perpendicular forces, however under shearing force the holding force is lower. Moreover, even a slight gap between the magnet’s surface and the plate reduces the holding force.
Safe handling of neodymium magnets
Electronic devices
Avoid bringing magnets close to a wallet, computer, or TV. The magnetism can irreversibly ruin these devices and erase data from cards.
Precision electronics
Remember: neodymium magnets produce a field that interferes with precision electronics. Maintain a separation from your mobile, tablet, and GPS.
Swallowing risk
These products are not toys. Accidental ingestion of multiple magnets may result in them pinching intestinal walls, which constitutes a severe health hazard and necessitates immediate surgery.
Life threat
Medical warning: Neodymium magnets can turn off heart devices and defibrillators. Do not approach if you have medical devices.
Flammability
Drilling and cutting of neodymium magnets carries a risk of fire risk. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.
Heat sensitivity
Keep cool. Neodymium magnets are susceptible to heat. If you require resistance above 80°C, ask us about HT versions (H, SH, UH).
Bone fractures
Large magnets can crush fingers instantly. Never place your hand between two strong magnets.
Metal Allergy
Some people suffer from a contact allergy to Ni, which is the typical protective layer for neodymium magnets. Prolonged contact might lead to dermatitis. We suggest wear protective gloves.
Powerful field
Before starting, check safety instructions. Sudden snapping can destroy the magnet or hurt your hand. Be predictive.
Eye protection
Watch out for shards. Magnets can explode upon uncontrolled impact, ejecting shards into the air. We recommend safety glasses.
