MW 15x10 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010027
GTIN/EAN: 5906301810261
Diameter Ø
15 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
13.25 g
Magnetization Direction
↑ axial
Load capacity
7.70 kg / 75.55 N
Magnetic Induction
495.60 mT / 4956 Gs
Coating
[NiCuNi] Nickel
4.51 ZŁ with VAT / pcs + price for transport
3.67 ZŁ net + 23% VAT / pcs
bulk discounts:
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Physical properties - MW 15x10 / N38 - cylindrical magnet
Specification / characteristics - MW 15x10 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010027 |
| GTIN/EAN | 5906301810261 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 15 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 13.25 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 7.70 kg / 75.55 N |
| Magnetic Induction ~ ? | 495.60 mT / 4956 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 analysis of the assembly - technical parameters
These data represent the outcome of a engineering calculation. Results rely on algorithms for the class Nd2Fe14B. Real-world performance may differ. Use these calculations as a preliminary roadmap for designers.
Table 1: Static force (pull vs gap) - interaction chart
MW 15x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4954 Gs
495.4 mT
|
7.70 kg / 16.98 pounds
7700.0 g / 75.5 N
|
strong |
| 1 mm |
4303 Gs
430.3 mT
|
5.81 kg / 12.81 pounds
5810.9 g / 57.0 N
|
strong |
| 2 mm |
3660 Gs
366.0 mT
|
4.20 kg / 9.27 pounds
4203.8 g / 41.2 N
|
strong |
| 3 mm |
3068 Gs
306.8 mT
|
2.95 kg / 6.51 pounds
2953.2 g / 29.0 N
|
strong |
| 5 mm |
2106 Gs
210.6 mT
|
1.39 kg / 3.07 pounds
1392.2 g / 13.7 N
|
weak grip |
| 10 mm |
845 Gs
84.5 mT
|
0.22 kg / 0.49 pounds
224.2 g / 2.2 N
|
weak grip |
| 15 mm |
393 Gs
39.3 mT
|
0.05 kg / 0.11 pounds
48.5 g / 0.5 N
|
weak grip |
| 20 mm |
210 Gs
21.0 mT
|
0.01 kg / 0.03 pounds
13.8 g / 0.1 N
|
weak grip |
| 30 mm |
79 Gs
7.9 mT
|
0.00 kg / 0.00 pounds
2.0 g / 0.0 N
|
weak grip |
| 50 mm |
21 Gs
2.1 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
weak grip |
Table 2: Slippage load (vertical surface)
MW 15x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
1.54 kg / 3.40 pounds
1540.0 g / 15.1 N
|
| 1 mm | Stal (~0.2) |
1.16 kg / 2.56 pounds
1162.0 g / 11.4 N
|
| 2 mm | Stal (~0.2) |
0.84 kg / 1.85 pounds
840.0 g / 8.2 N
|
| 3 mm | Stal (~0.2) |
0.59 kg / 1.30 pounds
590.0 g / 5.8 N
|
| 5 mm | Stal (~0.2) |
0.28 kg / 0.61 pounds
278.0 g / 2.7 N
|
| 10 mm | Stal (~0.2) |
0.04 kg / 0.10 pounds
44.0 g / 0.4 N
|
| 15 mm | Stal (~0.2) |
0.01 kg / 0.02 pounds
10.0 g / 0.1 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
2.0 g / 0.0 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 15x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
2.31 kg / 5.09 pounds
2310.0 g / 22.7 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
1.54 kg / 3.40 pounds
1540.0 g / 15.1 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.77 kg / 1.70 pounds
770.0 g / 7.6 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
3.85 kg / 8.49 pounds
3850.0 g / 37.8 N
|
Table 4: Material efficiency (saturation) - sheet metal selection
MW 15x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.77 kg / 1.70 pounds
770.0 g / 7.6 N
|
| 1 mm |
|
1.93 kg / 4.24 pounds
1925.0 g / 18.9 N
|
| 2 mm |
|
3.85 kg / 8.49 pounds
3850.0 g / 37.8 N
|
| 3 mm |
|
5.78 kg / 12.73 pounds
5775.0 g / 56.7 N
|
| 5 mm |
|
7.70 kg / 16.98 pounds
7700.0 g / 75.5 N
|
| 10 mm |
|
7.70 kg / 16.98 pounds
7700.0 g / 75.5 N
|
| 11 mm |
|
7.70 kg / 16.98 pounds
7700.0 g / 75.5 N
|
| 12 mm |
|
7.70 kg / 16.98 pounds
7700.0 g / 75.5 N
|
Table 5: Working in heat (material behavior) - thermal limit
MW 15x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
7.70 kg / 16.98 pounds
7700.0 g / 75.5 N
|
OK |
| 40 °C | -2.2% |
7.53 kg / 16.60 pounds
7530.6 g / 73.9 N
|
OK |
| 60 °C | -4.4% |
7.36 kg / 16.23 pounds
7361.2 g / 72.2 N
|
OK |
| 80 °C | -6.6% |
7.19 kg / 15.86 pounds
7191.8 g / 70.6 N
|
|
| 100 °C | -28.8% |
5.48 kg / 12.09 pounds
5482.4 g / 53.8 N
|
Table 6: Two magnets (repulsion) - field collision
MW 15x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
26.73 kg / 58.93 pounds
5 797 Gs
|
4.01 kg / 8.84 pounds
4010 g / 39.3 N
|
N/A |
| 1 mm |
23.38 kg / 51.55 pounds
9 265 Gs
|
3.51 kg / 7.73 pounds
3507 g / 34.4 N
|
21.04 kg / 46.39 pounds
~0 Gs
|
| 2 mm |
20.17 kg / 44.48 pounds
8 606 Gs
|
3.03 kg / 6.67 pounds
3026 g / 29.7 N
|
18.16 kg / 40.03 pounds
~0 Gs
|
| 3 mm |
17.23 kg / 37.99 pounds
7 955 Gs
|
2.59 kg / 5.70 pounds
2585 g / 25.4 N
|
15.51 kg / 34.19 pounds
~0 Gs
|
| 5 mm |
12.27 kg / 27.05 pounds
6 712 Gs
|
1.84 kg / 4.06 pounds
1840 g / 18.1 N
|
11.04 kg / 24.34 pounds
~0 Gs
|
| 10 mm |
4.83 kg / 10.66 pounds
4 213 Gs
|
0.73 kg / 1.60 pounds
725 g / 7.1 N
|
4.35 kg / 9.59 pounds
~0 Gs
|
| 20 mm |
0.78 kg / 1.72 pounds
1 690 Gs
|
0.12 kg / 0.26 pounds
117 g / 1.1 N
|
0.70 kg / 1.54 pounds
~0 Gs
|
| 50 mm |
0.02 kg / 0.04 pounds
248 Gs
|
0.00 kg / 0.01 pounds
3 g / 0.0 N
|
0.02 kg / 0.03 pounds
~0 Gs
|
| 60 mm |
0.01 kg / 0.01 pounds
158 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 70 mm |
0.00 kg / 0.01 pounds
107 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 pounds
75 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 90 mm |
0.00 kg / 0.00 pounds
55 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 100 mm |
0.00 kg / 0.00 pounds
41 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Safety (HSE) (implants) - warnings
MW 15x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 8.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 7.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 5.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 4.0 cm |
| Remote | 50 Gs (5.0 mT) | 4.0 cm |
| Payment card | 400 Gs (40.0 mT) | 1.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.5 cm |
Table 8: Impact energy (kinetic energy) - collision effects
MW 15x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
24.75 km/h
(6.88 m/s)
|
0.31 J | |
| 30 mm |
42.12 km/h
(11.70 m/s)
|
0.91 J | |
| 50 mm |
54.36 km/h
(15.10 m/s)
|
1.51 J | |
| 100 mm |
76.88 km/h
(21.36 m/s)
|
3.02 J |
Table 9: Anti-corrosion coating durability
MW 15x10 / 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 (Pc)
MW 15x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 8 827 Mx | 88.3 µWb |
| Pc Coefficient | 0.71 | High (Stable) |
Table 11: Physics of underwater searching
MW 15x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 7.70 kg | Standard |
| Water (riverbed) |
8.82 kg
(+1.12 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Caution: On a vertical wall, the magnet holds only approx. 20-30% of its nominal pull.
2. Steel saturation
*Thin metal sheet (e.g. computer case) severely reduces the holding force.
3. Power loss vs temp
*For standard magnets, the critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.71
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.
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
Pros and cons of rare earth magnets.
Advantages
- They do not lose power, even after around ten years – the reduction in strength is only ~1% (according to tests),
- They are noted for resistance to demagnetization induced by external field influence,
- In other words, due to the smooth layer of gold, the element becomes visually attractive,
- Magnetic induction on the working part of the magnet remains maximum,
- Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling action at temperatures approaching 230°C and above...
- Thanks to modularity in shaping and the capacity to customize to individual projects,
- Universal use in innovative solutions – they are commonly used in computer drives, electromotive mechanisms, medical equipment, also modern systems.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which enables their usage in compact constructions
Limitations
- Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a special holder, which not only protects them against impacts but also raises their 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, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- They rust in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
- We recommend cover - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complex shapes.
- Potential hazard to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the context of child safety. Additionally, small elements of these products can be problematic in diagnostics medical after entering the body.
- Due to neodymium price, their price is relatively high,
Pull force analysis
Maximum holding power of the magnet – what it depends on?
- with the application of a sheet made of low-carbon steel, ensuring full magnetic saturation
- possessing a massiveness of minimum 10 mm to ensure full flux closure
- with a surface free of scratches
- without the slightest air gap between the magnet and steel
- during pulling in a direction vertical to the mounting surface
- at temperature room level
What influences lifting capacity in practice
- Space between magnet and steel – every millimeter of distance (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
- Load vector – highest force is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is typically several times smaller (approx. 1/5 of the lifting capacity).
- Element thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
- Chemical composition of the base – low-carbon steel attracts best. Alloy admixtures decrease magnetic properties and holding force.
- Surface structure – the smoother and more polished the plate, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
- Thermal factor – hot environment weakens magnetic field. Too high temperature can permanently damage the magnet.
Lifting capacity was measured with the use of a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, whereas under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet’s surface and the plate reduces the holding force.
Precautions when working with NdFeB magnets
Keep away from electronics
Navigation devices and smartphones are extremely susceptible to magnetic fields. Direct contact with a powerful NdFeB magnet can permanently damage the sensors in your phone.
Bone fractures
Big blocks can break fingers instantly. Never put your hand between two strong magnets.
Respect the power
Use magnets with awareness. Their immense force can surprise even experienced users. Plan your moves and respect their force.
Combustion hazard
Mechanical processing of NdFeB material poses a fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.
Health Danger
People with a ICD should keep an safe separation from magnets. The magnetic field can interfere with the operation of the implant.
Magnetic media
Avoid bringing magnets close to a wallet, laptop, or screen. The magnetism can destroy these devices and wipe information from cards.
Heat sensitivity
Regular neodymium magnets (N-type) lose magnetization when the temperature exceeds 80°C. This process is irreversible.
Magnet fragility
Despite metallic appearance, the material is delicate and cannot withstand shocks. Avoid impacts, as the magnet may shatter into hazardous fragments.
Nickel allergy
Some people suffer from a contact allergy to Ni, which is the standard coating for neodymium magnets. Prolonged contact may cause a rash. We recommend use protective gloves.
Choking Hazard
NdFeB magnets are not intended for children. Accidental ingestion of a few magnets may result in them connecting inside the digestive tract, which constitutes a severe health hazard and requires immediate surgery.
