MP 30x6x10 / N38 - ring magnet
ring magnet
Catalog no 030197
GTIN/EAN: 5906301812142
Diameter
30 mm [±0,1 mm]
internal diameter Ø
6 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
50.89 g
Magnetization Direction
↑ axial
Load capacity
20.71 kg / 203.16 N
Magnetic Induction
343.81 mT / 3438 Gs
Coating
[NiCuNi] Nickel
16.00 ZŁ with VAT / pcs + price for transport
13.01 ZŁ net + 23% VAT / pcs
bulk discounts:
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Lifting power as well as shape of neodymium magnets can be tested with our
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Technical data - MP 30x6x10 / N38 - ring magnet
Specification / characteristics - MP 30x6x10 / N38 - ring magnet
| properties | values |
|---|---|
| Cat. no. | 030197 |
| GTIN/EAN | 5906301812142 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter | 30 mm [±0,1 mm] |
| internal diameter Ø | 6 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 50.89 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 20.71 kg / 203.16 N |
| Magnetic Induction ~ ? | 343.81 mT / 3438 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 |
Technical simulation of the product - report
Presented data are the outcome of a mathematical simulation. Results are based on models for the class Nd2Fe14B. Real-world performance might slightly deviate from the simulation results. Please consider these calculations as a reference point during assembly planning.
Table 1: Static force (force vs gap) - interaction chart
MP 30x6x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
5619 Gs
561.9 mT
|
20.71 kg / 45.66 pounds
20710.0 g / 203.2 N
|
critical level |
| 1 mm |
5241 Gs
524.1 mT
|
18.01 kg / 39.71 pounds
18011.7 g / 176.7 N
|
critical level |
| 2 mm |
4861 Gs
486.1 mT
|
15.50 kg / 34.17 pounds
15498.1 g / 152.0 N
|
critical level |
| 3 mm |
4490 Gs
449.0 mT
|
13.22 kg / 29.15 pounds
13223.5 g / 129.7 N
|
critical level |
| 5 mm |
3792 Gs
379.2 mT
|
9.43 kg / 20.79 pounds
9429.0 g / 92.5 N
|
warning |
| 10 mm |
2404 Gs
240.4 mT
|
3.79 kg / 8.36 pounds
3791.3 g / 37.2 N
|
warning |
| 15 mm |
1526 Gs
152.6 mT
|
1.53 kg / 3.37 pounds
1527.0 g / 15.0 N
|
safe |
| 20 mm |
1000 Gs
100.0 mT
|
0.66 kg / 1.45 pounds
655.5 g / 6.4 N
|
safe |
| 30 mm |
482 Gs
48.2 mT
|
0.15 kg / 0.34 pounds
152.6 g / 1.5 N
|
safe |
| 50 mm |
161 Gs
16.1 mT
|
0.02 kg / 0.04 pounds
17.0 g / 0.2 N
|
safe |
Table 2: Slippage force (vertical surface)
MP 30x6x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
4.14 kg / 9.13 pounds
4142.0 g / 40.6 N
|
| 1 mm | Stal (~0.2) |
3.60 kg / 7.94 pounds
3602.0 g / 35.3 N
|
| 2 mm | Stal (~0.2) |
3.10 kg / 6.83 pounds
3100.0 g / 30.4 N
|
| 3 mm | Stal (~0.2) |
2.64 kg / 5.83 pounds
2644.0 g / 25.9 N
|
| 5 mm | Stal (~0.2) |
1.89 kg / 4.16 pounds
1886.0 g / 18.5 N
|
| 10 mm | Stal (~0.2) |
0.76 kg / 1.67 pounds
758.0 g / 7.4 N
|
| 15 mm | Stal (~0.2) |
0.31 kg / 0.67 pounds
306.0 g / 3.0 N
|
| 20 mm | Stal (~0.2) |
0.13 kg / 0.29 pounds
132.0 g / 1.3 N
|
| 30 mm | Stal (~0.2) |
0.03 kg / 0.07 pounds
30.0 g / 0.3 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.01 pounds
4.0 g / 0.0 N
|
Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MP 30x6x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
6.21 kg / 13.70 pounds
6213.0 g / 60.9 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
4.14 kg / 9.13 pounds
4142.0 g / 40.6 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
2.07 kg / 4.57 pounds
2071.0 g / 20.3 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
10.36 kg / 22.83 pounds
10355.0 g / 101.6 N
|
Table 4: Material efficiency (saturation) - power losses
MP 30x6x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
1.04 kg / 2.28 pounds
1035.5 g / 10.2 N
|
| 1 mm |
|
2.59 kg / 5.71 pounds
2588.8 g / 25.4 N
|
| 2 mm |
|
5.18 kg / 11.41 pounds
5177.5 g / 50.8 N
|
| 3 mm |
|
7.77 kg / 17.12 pounds
7766.3 g / 76.2 N
|
| 5 mm |
|
12.94 kg / 28.54 pounds
12943.8 g / 127.0 N
|
| 10 mm |
|
20.71 kg / 45.66 pounds
20710.0 g / 203.2 N
|
| 11 mm |
|
20.71 kg / 45.66 pounds
20710.0 g / 203.2 N
|
| 12 mm |
|
20.71 kg / 45.66 pounds
20710.0 g / 203.2 N
|
Table 5: Thermal resistance (stability) - power drop
MP 30x6x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
20.71 kg / 45.66 pounds
20710.0 g / 203.2 N
|
OK |
| 40 °C | -2.2% |
20.25 kg / 44.65 pounds
20254.4 g / 198.7 N
|
OK |
| 60 °C | -4.4% |
19.80 kg / 43.65 pounds
19798.8 g / 194.2 N
|
OK |
| 80 °C | -6.6% |
19.34 kg / 42.64 pounds
19343.1 g / 189.8 N
|
|
| 100 °C | -28.8% |
14.75 kg / 32.51 pounds
14745.5 g / 144.7 N
|
Table 6: Two magnets (repulsion) - field range
MP 30x6x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
103.97 kg / 229.22 pounds
6 035 Gs
|
15.60 kg / 34.38 pounds
15596 g / 153.0 N
|
N/A |
| 1 mm |
97.15 kg / 214.17 pounds
10 864 Gs
|
14.57 kg / 32.13 pounds
14572 g / 143.0 N
|
87.43 kg / 192.75 pounds
~0 Gs
|
| 2 mm |
90.42 kg / 199.35 pounds
10 481 Gs
|
13.56 kg / 29.90 pounds
13564 g / 133.1 N
|
81.38 kg / 179.42 pounds
~0 Gs
|
| 3 mm |
83.97 kg / 185.13 pounds
10 100 Gs
|
12.60 kg / 27.77 pounds
12596 g / 123.6 N
|
75.57 kg / 166.61 pounds
~0 Gs
|
| 5 mm |
71.94 kg / 158.60 pounds
9 349 Gs
|
10.79 kg / 23.79 pounds
10791 g / 105.9 N
|
64.75 kg / 142.74 pounds
~0 Gs
|
| 10 mm |
47.34 kg / 104.36 pounds
7 583 Gs
|
7.10 kg / 15.65 pounds
7100 g / 69.7 N
|
42.60 kg / 93.92 pounds
~0 Gs
|
| 20 mm |
19.03 kg / 41.96 pounds
4 809 Gs
|
2.86 kg / 6.29 pounds
2855 g / 28.0 N
|
17.13 kg / 37.77 pounds
~0 Gs
|
| 50 mm |
1.53 kg / 3.37 pounds
1 363 Gs
|
0.23 kg / 0.51 pounds
229 g / 2.2 N
|
1.38 kg / 3.03 pounds
~0 Gs
|
| 60 mm |
0.77 kg / 1.69 pounds
965 Gs
|
0.11 kg / 0.25 pounds
115 g / 1.1 N
|
0.69 kg / 1.52 pounds
~0 Gs
|
| 70 mm |
0.41 kg / 0.90 pounds
706 Gs
|
0.06 kg / 0.14 pounds
61 g / 0.6 N
|
0.37 kg / 0.81 pounds
~0 Gs
|
| 80 mm |
0.23 kg / 0.51 pounds
531 Gs
|
0.03 kg / 0.08 pounds
35 g / 0.3 N
|
0.21 kg / 0.46 pounds
~0 Gs
|
| 90 mm |
0.14 kg / 0.30 pounds
409 Gs
|
0.02 kg / 0.05 pounds
21 g / 0.2 N
|
0.12 kg / 0.27 pounds
~0 Gs
|
| 100 mm |
0.09 kg / 0.19 pounds
322 Gs
|
0.01 kg / 0.03 pounds
13 g / 0.1 N
|
0.08 kg / 0.17 pounds
~0 Gs
|
Table 7: Hazards (implants) - precautionary measures
MP 30x6x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 19.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 15.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 12.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 9.0 cm |
| Remote | 50 Gs (5.0 mT) | 8.5 cm |
| Payment card | 400 Gs (40.0 mT) | 3.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 3.0 cm |
Table 8: Collisions (kinetic energy) - collision effects
MP 30x6x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
22.55 km/h
(6.26 m/s)
|
1.00 J | |
| 30 mm |
35.40 km/h
(9.83 m/s)
|
2.46 J | |
| 50 mm |
45.52 km/h
(12.64 m/s)
|
4.07 J | |
| 100 mm |
64.34 km/h
(17.87 m/s)
|
8.13 J |
Table 9: Corrosion resistance
MP 30x6x10 / 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 30x6x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 31 585 Mx | 315.8 µWb |
| Pc Coefficient | 0.96 | High (Stable) |
Table 11: Hydrostatics and buoyancy
MP 30x6x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 20.71 kg | Standard |
| Water (riverbed) |
23.71 kg
(+3.00 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Note: On a vertical surface, the magnet retains only ~20% of its perpendicular strength.
2. Plate thickness effect
*Thin steel (e.g. computer case) drastically limits the holding force.
3. Heat tolerance
*For N38 grade, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.96
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 products
Advantages as well as disadvantages of Nd2Fe14B magnets.
Benefits
- They retain magnetic properties for nearly ten years – the drop is just ~1% (based on simulations),
- They possess excellent resistance to magnetism drop due to external fields,
- Thanks to the smooth finish, the coating of Ni-Cu-Ni, gold-plated, or silver-plated gives an modern appearance,
- Neodymium magnets achieve maximum magnetic induction on a small area, which allows for strong attraction,
- Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
- Due to the ability of precise shaping and adaptation to unique needs, neodymium magnets can be produced in a broad palette of shapes and sizes, which expands the range of possible applications,
- Universal use in future technologies – they are used in computer drives, electric motors, medical devices, and multitasking production systems.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in miniature devices
Weaknesses
- At very strong impacts they can crack, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
- We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
- They rust in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- Due to limitations in producing threads and complex forms in magnets, we recommend using a housing - magnetic mount.
- Possible danger resulting from small fragments of magnets pose a threat, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small components of these magnets can disrupt the diagnostic process medical after entering the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Pull force analysis
Breakaway strength of the magnet in ideal conditions – what it depends on?
- using a base made of low-carbon steel, functioning as a circuit closing element
- whose thickness reaches at least 10 mm
- with an ideally smooth touching surface
- with zero gap (no coatings)
- under perpendicular force vector (90-degree angle)
- in temp. approx. 20°C
Lifting capacity in practice – influencing factors
- Distance – existence of foreign body (rust, tape, gap) 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 applying parallel force, the magnet holds much less (often approx. 20-30% of maximum force).
- Steel thickness – too thin sheet does not close the flux, causing part of the flux to be lost to the other side.
- Plate material – low-carbon steel attracts best. Higher carbon content decrease magnetic properties and holding force.
- Smoothness – full contact is obtained only on polished steel. Rough texture create air cushions, reducing force.
- Thermal environment – temperature increase results in weakening of force. Check the maximum operating temperature for a given model.
Lifting capacity was determined using a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, whereas under shearing force the holding force is lower. Additionally, even a small distance between the magnet and the plate reduces the holding force.
Warnings
Maximum temperature
Avoid heat. NdFeB magnets are sensitive to temperature. If you need resistance above 80°C, ask us about special high-temperature series (H, SH, UH).
Keep away from children
These products are not toys. Eating several magnets can lead to them attracting across intestines, which poses a severe health hazard and requires urgent medical intervention.
Fire risk
Fire hazard: Rare earth powder is explosive. Avoid machining magnets in home conditions as this may cause fire.
Medical implants
Individuals with a heart stimulator have to maintain an safe separation from magnets. The magnetic field can disrupt the functioning of the implant.
Handling guide
Before starting, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.
Magnetic interference
A powerful magnetic field negatively affects the operation of magnetometers in phones and GPS navigation. Keep magnets close to a device to avoid breaking the sensors.
Crushing risk
Pinching hazard: The attraction force is so immense that it can cause blood blisters, crushing, and broken bones. Use thick gloves.
Material brittleness
Neodymium magnets are ceramic materials, meaning they are fragile like glass. Collision of two magnets will cause them breaking into small pieces.
Electronic hazard
Equipment safety: Neodymium magnets can damage data carriers and sensitive devices (pacemakers, hearing aids, timepieces).
Warning for allergy sufferers
Some people experience a sensitization to nickel, which is the standard coating for neodymium magnets. Frequent touching might lead to dermatitis. It is best to use protective gloves.
