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
bulk discounts:
Need more?
Give us a call
+48 22 499 98 98
alternatively drop us a message through
form
our website.
Parameters and shape of magnetic components can be calculated with our
force calculator.
Same-day processing for orders placed before 14:00.
Technical specification of the product - 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 |
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 |
|
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) - 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% |
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.
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 |
Other offers
Strengths as well as weaknesses of rare earth magnets.
Strengths
- 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
- 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?
- 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
- 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).
