MPL 40x15x6 / N38 - lamellar magnet
lamellar magnet
Catalog no 020155
GTIN/EAN: 5906301811619
length
40 mm [±0,1 mm]
Width
15 mm [±0,1 mm]
Height
6 mm [±0,1 mm]
Weight
27 g
Magnetization Direction
↑ axial
Load capacity
14.21 kg / 139.45 N
Magnetic Induction
286.36 mT / 2864 Gs
Coating
[NiCuNi] Nickel
18.45 ZŁ with VAT / pcs + price for transport
15.00 ZŁ net + 23% VAT / pcs
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Technical - MPL 40x15x6 / N38 - lamellar magnet
Specification / characteristics - MPL 40x15x6 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020155 |
| GTIN/EAN | 5906301811619 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 40 mm [±0,1 mm] |
| Width | 15 mm [±0,1 mm] |
| Height | 6 mm [±0,1 mm] |
| Weight | 27 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 14.21 kg / 139.45 N |
| Magnetic Induction ~ ? | 286.36 mT / 2864 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 modeling of the assembly - technical parameters
These values are the direct effect of a engineering simulation. Results were calculated on algorithms for the class Nd2Fe14B. Real-world conditions might slightly deviate from the simulation results. Treat these data as a preliminary roadmap during assembly planning.
Table 1: Static pull force (force vs gap) - characteristics
MPL 40x15x6 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
2863 Gs
286.3 mT
|
14.21 kg / 31.33 lbs
14210.0 g / 139.4 N
|
critical level |
| 1 mm |
2635 Gs
263.5 mT
|
12.04 kg / 26.55 lbs
12041.8 g / 118.1 N
|
critical level |
| 2 mm |
2385 Gs
238.5 mT
|
9.86 kg / 21.74 lbs
9859.1 g / 96.7 N
|
medium risk |
| 3 mm |
2132 Gs
213.2 mT
|
7.88 kg / 17.37 lbs
7880.1 g / 77.3 N
|
medium risk |
| 5 mm |
1670 Gs
167.0 mT
|
4.84 kg / 10.66 lbs
4837.1 g / 47.5 N
|
medium risk |
| 10 mm |
903 Gs
90.3 mT
|
1.41 kg / 3.11 lbs
1412.2 g / 13.9 N
|
low risk |
| 15 mm |
520 Gs
52.0 mT
|
0.47 kg / 1.03 lbs
469.2 g / 4.6 N
|
low risk |
| 20 mm |
320 Gs
32.0 mT
|
0.18 kg / 0.39 lbs
177.7 g / 1.7 N
|
low risk |
| 30 mm |
141 Gs
14.1 mT
|
0.03 kg / 0.08 lbs
34.5 g / 0.3 N
|
low risk |
| 50 mm |
41 Gs
4.1 mT
|
0.00 kg / 0.01 lbs
3.0 g / 0.0 N
|
low risk |
Table 2: Vertical load (vertical surface)
MPL 40x15x6 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
2.84 kg / 6.27 lbs
2842.0 g / 27.9 N
|
| 1 mm | Stal (~0.2) |
2.41 kg / 5.31 lbs
2408.0 g / 23.6 N
|
| 2 mm | Stal (~0.2) |
1.97 kg / 4.35 lbs
1972.0 g / 19.3 N
|
| 3 mm | Stal (~0.2) |
1.58 kg / 3.47 lbs
1576.0 g / 15.5 N
|
| 5 mm | Stal (~0.2) |
0.97 kg / 2.13 lbs
968.0 g / 9.5 N
|
| 10 mm | Stal (~0.2) |
0.28 kg / 0.62 lbs
282.0 g / 2.8 N
|
| 15 mm | Stal (~0.2) |
0.09 kg / 0.21 lbs
94.0 g / 0.9 N
|
| 20 mm | Stal (~0.2) |
0.04 kg / 0.08 lbs
36.0 g / 0.4 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
MPL 40x15x6 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
4.26 kg / 9.40 lbs
4263.0 g / 41.8 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
2.84 kg / 6.27 lbs
2842.0 g / 27.9 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
1.42 kg / 3.13 lbs
1421.0 g / 13.9 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
7.11 kg / 15.66 lbs
7105.0 g / 69.7 N
|
Table 4: Material efficiency (saturation) - sheet metal selection
MPL 40x15x6 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.71 kg / 1.57 lbs
710.5 g / 7.0 N
|
| 1 mm |
|
1.78 kg / 3.92 lbs
1776.3 g / 17.4 N
|
| 2 mm |
|
3.55 kg / 7.83 lbs
3552.5 g / 34.9 N
|
| 3 mm |
|
5.33 kg / 11.75 lbs
5328.8 g / 52.3 N
|
| 5 mm |
|
8.88 kg / 19.58 lbs
8881.3 g / 87.1 N
|
| 10 mm |
|
14.21 kg / 31.33 lbs
14210.0 g / 139.4 N
|
| 11 mm |
|
14.21 kg / 31.33 lbs
14210.0 g / 139.4 N
|
| 12 mm |
|
14.21 kg / 31.33 lbs
14210.0 g / 139.4 N
|
Table 5: Thermal stability (material behavior) - thermal limit
MPL 40x15x6 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
14.21 kg / 31.33 lbs
14210.0 g / 139.4 N
|
OK |
| 40 °C | -2.2% |
13.90 kg / 30.64 lbs
13897.4 g / 136.3 N
|
OK |
| 60 °C | -4.4% |
13.58 kg / 29.95 lbs
13584.8 g / 133.3 N
|
|
| 80 °C | -6.6% |
13.27 kg / 29.26 lbs
13272.1 g / 130.2 N
|
|
| 100 °C | -28.8% |
10.12 kg / 22.31 lbs
10117.5 g / 99.3 N
|
Table 6: Two magnets (repulsion) - forces in the system
MPL 40x15x6 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
30.32 kg / 66.84 lbs
4 334 Gs
|
4.55 kg / 10.03 lbs
4547 g / 44.6 N
|
N/A |
| 1 mm |
28.06 kg / 61.86 lbs
5 508 Gs
|
4.21 kg / 9.28 lbs
4209 g / 41.3 N
|
25.25 kg / 55.67 lbs
~0 Gs
|
| 2 mm |
25.69 kg / 56.64 lbs
5 271 Gs
|
3.85 kg / 8.50 lbs
3854 g / 37.8 N
|
23.12 kg / 50.97 lbs
~0 Gs
|
| 3 mm |
23.33 kg / 51.43 lbs
5 023 Gs
|
3.50 kg / 7.71 lbs
3499 g / 34.3 N
|
21.00 kg / 46.29 lbs
~0 Gs
|
| 5 mm |
18.85 kg / 41.56 lbs
4 515 Gs
|
2.83 kg / 6.23 lbs
2828 g / 27.7 N
|
16.97 kg / 37.40 lbs
~0 Gs
|
| 10 mm |
10.32 kg / 22.75 lbs
3 341 Gs
|
1.55 kg / 3.41 lbs
1548 g / 15.2 N
|
9.29 kg / 20.48 lbs
~0 Gs
|
| 20 mm |
3.01 kg / 6.64 lbs
1 805 Gs
|
0.45 kg / 1.00 lbs
452 g / 4.4 N
|
2.71 kg / 5.98 lbs
~0 Gs
|
| 50 mm |
0.16 kg / 0.35 lbs
416 Gs
|
0.02 kg / 0.05 lbs
24 g / 0.2 N
|
0.14 kg / 0.32 lbs
~0 Gs
|
| 60 mm |
0.07 kg / 0.16 lbs
282 Gs
|
0.01 kg / 0.02 lbs
11 g / 0.1 N
|
0.07 kg / 0.15 lbs
~0 Gs
|
| 70 mm |
0.04 kg / 0.08 lbs
199 Gs
|
0.01 kg / 0.01 lbs
5 g / 0.1 N
|
0.03 kg / 0.07 lbs
~0 Gs
|
| 80 mm |
0.02 kg / 0.04 lbs
144 Gs
|
0.00 kg / 0.01 lbs
3 g / 0.0 N
|
0.02 kg / 0.04 lbs
~0 Gs
|
| 90 mm |
0.01 kg / 0.02 lbs
108 Gs
|
0.00 kg / 0.00 lbs
2 g / 0.0 N
|
0.01 kg / 0.02 lbs
~0 Gs
|
| 100 mm |
0.01 kg / 0.01 lbs
83 Gs
|
0.00 kg / 0.00 lbs
1 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
Table 7: Protective zones (implants) - warnings
MPL 40x15x6 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 11.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 8.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 7.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 5.5 cm |
| Car key | 50 Gs (5.0 mT) | 5.0 cm |
| Payment card | 400 Gs (40.0 mT) | 2.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.5 cm |
Table 8: Impact energy (cracking risk) - collision effects
MPL 40x15x6 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
24.53 km/h
(6.81 m/s)
|
0.63 J | |
| 30 mm |
40.13 km/h
(11.15 m/s)
|
1.68 J | |
| 50 mm |
51.74 km/h
(14.37 m/s)
|
2.79 J | |
| 100 mm |
73.16 km/h
(20.32 m/s)
|
5.58 J |
Table 9: Anti-corrosion coating durability
MPL 40x15x6 / 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)
MPL 40x15x6 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 16 905 Mx | 169.0 µWb |
| Pc Coefficient | 0.31 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
MPL 40x15x6 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 14.21 kg | Standard |
| Water (riverbed) |
16.27 kg
(+2.06 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Note: On a vertical surface, the magnet holds only ~20% of its max power.
2. Steel saturation
*Thin metal sheet (e.g. computer case) significantly limits the holding force.
3. Power loss vs temp
*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) = 0.31
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.
Chemical composition
| 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 deals
Advantages and disadvantages of Nd2Fe14B magnets.
Advantages
- Their strength is maintained, and after approximately ten years it decreases only by ~1% (theoretically),
- They are noted for resistance to demagnetization induced by presence of other magnetic fields,
- By applying a lustrous coating of nickel, the element has an modern look,
- The surface of neodymium magnets generates a strong magnetic field – this is a key feature,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Due to the potential of free molding and customization to unique needs, magnetic components can be produced in a variety of geometric configurations, which increases their versatility,
- Wide application in innovative solutions – they are utilized in hard drives, drive modules, advanced medical instruments, also industrial machines.
- Thanks to concentrated force, small magnets offer high operating force, with minimal size,
Weaknesses
- They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
- We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
- When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation as well as corrosion.
- Due to limitations in producing threads and complicated forms in magnets, we recommend using casing - magnetic mechanism.
- Potential hazard resulting from small fragments of magnets pose a threat, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Additionally, small components of these products can disrupt the diagnostic process medical when they are in the body.
- With large orders the cost of neodymium magnets can be a barrier,
Holding force characteristics
Maximum lifting force for a neodymium magnet – what contributes to it?
- with the application of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
- whose thickness reaches at least 10 mm
- with a surface cleaned and smooth
- with zero gap (no paint)
- under axial application of breakaway force (90-degree angle)
- at temperature room level
Magnet lifting force in use – key factors
- Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) diminishes the pulling force, often by half at just 0.5 mm.
- Force direction – declared lifting capacity refers to detachment vertically. When slipping, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
- Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of generating force.
- Material composition – not every steel attracts identically. Alloy additives weaken the attraction effect.
- Surface finish – ideal contact is possible only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
- Temperature influence – high temperature weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity was measured with the use of a smooth steel plate of optimal thickness (min. 20 mm), under vertically applied force, however under attempts to slide the magnet the holding force is lower. Moreover, even a small distance between the magnet and the plate reduces the load capacity.
Safety rules for work with neodymium magnets
Crushing risk
Big blocks can smash fingers in a fraction of a second. Never place your hand betwixt two strong magnets.
Nickel coating and allergies
Certain individuals experience a hypersensitivity to Ni, which is the common plating for neodymium magnets. Frequent touching can result in an allergic reaction. It is best to use safety gloves.
Fragile material
NdFeB magnets are sintered ceramics, meaning they are very brittle. Impact of two magnets will cause them cracking into shards.
Data carriers
Data protection: Strong magnets can damage data carriers and sensitive devices (pacemakers, medical aids, timepieces).
Fire warning
Drilling and cutting of neodymium magnets carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.
Permanent damage
Keep cool. Neodymium magnets are sensitive to heat. If you need resistance above 80°C, look for special high-temperature series (H, SH, UH).
Do not give to children
Adult use only. Small elements can be swallowed, leading to severe trauma. Keep away from kids and pets.
Magnetic interference
An intense magnetic field disrupts the operation of compasses in smartphones and navigation systems. Maintain magnets close to a smartphone to prevent damaging the sensors.
Caution required
Handle magnets consciously. Their huge power can shock even professionals. Stay alert and do not underestimate their force.
Implant safety
Warning for patients: Powerful magnets disrupt medical devices. Keep at least 30 cm distance or request help to work with the magnets.
