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
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
11.34 zł net / pcs
13.95 zł with VAT (23% VAT) / pcs
bulk discounts:
Need more?Frequently asked questions
What is the hole in a ring magnet for?
What is the polarisation?
What sizes are available?
Engineering report for this magnet
Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.
Call us now
+48 888 99 98 98
alternatively let us know using
contact form
the contact section.
Specifications and structure of a neodymium magnet can be estimated using our
power calculator.
Order by 14:00 and we’ll ship today!
Product card - 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 |
|---|---|---|
| Remanence Br ? | 12.2-12.6 | kGs |
| Remanence Br ? | 1220-1260 | mT |
| Coercivity bHc ? | 10.8-11.5 | kOe |
| Coercivity bHc ? | 860-915 | kA/m |
| Intrinsic coercivity iHc | ≥ 12 | kOe |
| Intrinsic coercivity iHc | ≥ 955 | kA/m |
| Energy product BHmax ? | 36-38 | BH max MGOe |
| Energy product BHmax ? | 287-303 | BH max KJ/m |
| Maximum working 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 | 310 | °C |
| Curie Temperature TF | 590 | °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 - report
Presented information constitute the result of a mathematical calculation. Values rely on models for the material Nd2Fe14B. Actual conditions might slightly differ from theoretical values. Treat these data as a reference point when designing systems.
Table 1: Static pull force (pull vs distance) - interaction chart
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
|
safe |
| 15 mm |
1039 Gs
103.9 mT
|
0.43 kg / 0.95 lbs
428.7 g / 4.2 N
|
safe |
| 20 mm |
635 Gs
63.5 mT
|
0.16 kg / 0.35 lbs
159.9 g / 1.6 N
|
safe |
| 30 mm |
285 Gs
28.5 mT
|
0.03 kg / 0.07 lbs
32.1 g / 0.3 N
|
safe |
| 50 mm |
90 Gs
9.0 mT
|
0.00 kg / 0.01 lbs
3.2 g / 0.0 N
|
safe |
Table 2: Slippage hold (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 (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: Steel thickness (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 (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) | 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: Safety (HSE) (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 |
| 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: Dynamics (kinetic energy) - collision effects
MP 22x6x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
23.12 km/h
(6.42 m/s)
|
0.54 J | |
| 30 mm |
24.35 km/h
(6.76 m/s)
|
0.60 J | |
| 50 mm |
24.40 km/h
(6.78 m/s)
|
0.61 J | |
| 100 mm |
24.41 km/h
(6.78 m/s)
|
0.61 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: 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: Underwater work (magnet fishing)
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 ~20% of its max power.
2. Plate thickness effect
*Thin metal sheet (e.g. computer case) severely reduces the holding force.
3. Power loss vs temp
*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.
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 and weaknesses of Nd2Fe14B magnets.
Advantages
- They do not lose magnetism, even after around ten years – the decrease in power is only ~1% (according to tests),
- Magnets perfectly protect themselves against loss of magnetization caused by external fields,
- The use of an elegant finish of noble metals (nickel, gold, silver) causes the element to present itself better,
- They show high magnetic induction at the operating surface, which increases their power,
- Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
- Possibility of detailed forming and modifying to defined needs,
- Universal use in advanced technology sectors – they are used in data components, motor assemblies, diagnostic systems, also industrial machines.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Cons
- To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
- When exposed to high temperature, neodymium magnets experience a drop in force. 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
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
- Due to limitations in realizing nuts and complicated forms in magnets, we propose using a housing - magnetic mount.
- Health risk related to microscopic parts of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child health protection. It is also worth noting that small elements of these products can be problematic in diagnostics medical after entering the body.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Holding force characteristics
Maximum holding power of the magnet – what it depends on?
- with the application of a yoke made of special test steel, guaranteeing maximum field concentration
- whose transverse dimension is min. 10 mm
- characterized by lack of roughness
- under conditions of no distance (metal-to-metal)
- under perpendicular application of breakaway force (90-degree angle)
- at temperature approx. 20 degrees Celsius
Practical lifting capacity: influencing factors
- Distance (between the magnet and the plate), because even a very small clearance (e.g. 0.5 mm) leads to a drastic drop in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
- Force direction – note that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
- Plate thickness – too thin plate does not close the flux, causing part of the power to be lost into the air.
- Metal type – not every steel attracts identically. High carbon content worsen the attraction effect.
- Surface condition – ground elements ensure maximum contact, which increases field saturation. Rough surfaces reduce efficiency.
- Thermal factor – hot environment weakens magnetic field. Exceeding the limit temperature can permanently damage the magnet.
Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under shearing force the load capacity is reduced by as much as 5 times. In addition, even a minimal clearance between the magnet and the plate decreases the lifting capacity.
Warnings
Immense force
Handle magnets consciously. Their huge power can shock even professionals. Plan your moves and do not underestimate their power.
Magnets are brittle
Despite metallic appearance, neodymium is delicate and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.
Nickel coating and allergies
A percentage of the population suffer from a hypersensitivity to nickel, which is the common plating for neodymium magnets. Frequent touching might lead to an allergic reaction. We suggest use safety gloves.
Cards and drives
Avoid bringing magnets close to a purse, laptop, or TV. The magnetism can irreversibly ruin these devices and erase data from cards.
Demagnetization risk
Do not overheat. Neodymium magnets are sensitive to heat. If you require operation above 80°C, inquire about HT versions (H, SH, UH).
Threat to navigation
GPS units and mobile phones are extremely sensitive to magnetism. Direct contact with a strong magnet can permanently damage the internal compass in your phone.
Fire warning
Fire warning: Rare earth powder is highly flammable. Do not process magnets without safety gear as this may cause fire.
Finger safety
Big blocks can smash fingers instantly. Do not put your hand betwixt two strong magnets.
Do not give to children
Strictly store magnets out of reach of children. Choking hazard is significant, and the effects of magnets connecting inside the body are tragic.
Medical interference
Patients with a ICD must keep an safe separation from magnets. The magnetic field can stop the functioning of the life-saving device.
