MW 14x3 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010025
GTIN/EAN: 5906301810247
Diameter Ø
14 mm [±0,1 mm]
Height
3 mm [±0,1 mm]
Weight
3.46 g
Magnetization Direction
↑ axial
Load capacity
2.76 kg / 27.06 N
Magnetic Induction
244.11 mT / 2441 Gs
Coating
[NiCuNi] Nickel
1.845 ZŁ with VAT / pcs + price for transport
1.500 ZŁ net + 23% VAT / pcs
bulk discounts:
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Physical properties - MW 14x3 / N38 - cylindrical magnet
Specification / characteristics - MW 14x3 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010025 |
| GTIN/EAN | 5906301810247 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 14 mm [±0,1 mm] |
| Height | 3 mm [±0,1 mm] |
| Weight | 3.46 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 2.76 kg / 27.06 N |
| Magnetic Induction ~ ? | 244.11 mT / 2441 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 product - report
The following values represent the result of a physical simulation. Values are based on models for the class Nd2Fe14B. Actual conditions might slightly differ. Please consider these calculations as a reference point for designers.
Table 1: Static force (pull vs gap) - power drop
MW 14x3 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
2440 Gs
244.0 mT
|
2.76 kg / 6.08 LBS
2760.0 g / 27.1 N
|
strong |
| 1 mm |
2199 Gs
219.9 mT
|
2.24 kg / 4.94 LBS
2241.6 g / 22.0 N
|
strong |
| 2 mm |
1900 Gs
190.0 mT
|
1.67 kg / 3.69 LBS
1673.8 g / 16.4 N
|
safe |
| 3 mm |
1593 Gs
159.3 mT
|
1.18 kg / 2.59 LBS
1175.5 g / 11.5 N
|
safe |
| 5 mm |
1062 Gs
106.2 mT
|
0.52 kg / 1.15 LBS
523.0 g / 5.1 N
|
safe |
| 10 mm |
380 Gs
38.0 mT
|
0.07 kg / 0.15 LBS
66.8 g / 0.7 N
|
safe |
| 15 mm |
160 Gs
16.0 mT
|
0.01 kg / 0.03 LBS
11.9 g / 0.1 N
|
safe |
| 20 mm |
79 Gs
7.9 mT
|
0.00 kg / 0.01 LBS
2.9 g / 0.0 N
|
safe |
| 30 mm |
27 Gs
2.7 mT
|
0.00 kg / 0.00 LBS
0.3 g / 0.0 N
|
safe |
| 50 mm |
7 Gs
0.7 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
Table 2: Vertical capacity (wall)
MW 14x3 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.55 kg / 1.22 LBS
552.0 g / 5.4 N
|
| 1 mm | Stal (~0.2) |
0.45 kg / 0.99 LBS
448.0 g / 4.4 N
|
| 2 mm | Stal (~0.2) |
0.33 kg / 0.74 LBS
334.0 g / 3.3 N
|
| 3 mm | Stal (~0.2) |
0.24 kg / 0.52 LBS
236.0 g / 2.3 N
|
| 5 mm | Stal (~0.2) |
0.10 kg / 0.23 LBS
104.0 g / 1.0 N
|
| 10 mm | Stal (~0.2) |
0.01 kg / 0.03 LBS
14.0 g / 0.1 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
2.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 14x3 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.83 kg / 1.83 LBS
828.0 g / 8.1 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.55 kg / 1.22 LBS
552.0 g / 5.4 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.28 kg / 0.61 LBS
276.0 g / 2.7 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.38 kg / 3.04 LBS
1380.0 g / 13.5 N
|
Table 4: Steel thickness (substrate influence) - power losses
MW 14x3 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.28 kg / 0.61 LBS
276.0 g / 2.7 N
|
| 1 mm |
|
0.69 kg / 1.52 LBS
690.0 g / 6.8 N
|
| 2 mm |
|
1.38 kg / 3.04 LBS
1380.0 g / 13.5 N
|
| 3 mm |
|
2.07 kg / 4.56 LBS
2070.0 g / 20.3 N
|
| 5 mm |
|
2.76 kg / 6.08 LBS
2760.0 g / 27.1 N
|
| 10 mm |
|
2.76 kg / 6.08 LBS
2760.0 g / 27.1 N
|
| 11 mm |
|
2.76 kg / 6.08 LBS
2760.0 g / 27.1 N
|
| 12 mm |
|
2.76 kg / 6.08 LBS
2760.0 g / 27.1 N
|
Table 5: Working in heat (material behavior) - thermal limit
MW 14x3 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
2.76 kg / 6.08 LBS
2760.0 g / 27.1 N
|
OK |
| 40 °C | -2.2% |
2.70 kg / 5.95 LBS
2699.3 g / 26.5 N
|
OK |
| 60 °C | -4.4% |
2.64 kg / 5.82 LBS
2638.6 g / 25.9 N
|
|
| 80 °C | -6.6% |
2.58 kg / 5.68 LBS
2577.8 g / 25.3 N
|
|
| 100 °C | -28.8% |
1.97 kg / 4.33 LBS
1965.1 g / 19.3 N
|
Table 6: Two magnets (repulsion) - forces in the system
MW 14x3 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
5.65 kg / 12.46 LBS
4 030 Gs
|
0.85 kg / 1.87 LBS
848 g / 8.3 N
|
N/A |
| 1 mm |
5.16 kg / 11.37 LBS
4 662 Gs
|
0.77 kg / 1.71 LBS
773 g / 7.6 N
|
4.64 kg / 10.23 LBS
~0 Gs
|
| 2 mm |
4.59 kg / 10.12 LBS
4 398 Gs
|
0.69 kg / 1.52 LBS
689 g / 6.8 N
|
4.13 kg / 9.11 LBS
~0 Gs
|
| 3 mm |
4.00 kg / 8.82 LBS
4 107 Gs
|
0.60 kg / 1.32 LBS
600 g / 5.9 N
|
3.60 kg / 7.94 LBS
~0 Gs
|
| 5 mm |
2.89 kg / 6.37 LBS
3 490 Gs
|
0.43 kg / 0.96 LBS
434 g / 4.3 N
|
2.60 kg / 5.74 LBS
~0 Gs
|
| 10 mm |
1.07 kg / 2.36 LBS
2 125 Gs
|
0.16 kg / 0.35 LBS
161 g / 1.6 N
|
0.96 kg / 2.12 LBS
~0 Gs
|
| 20 mm |
0.14 kg / 0.30 LBS
759 Gs
|
0.02 kg / 0.05 LBS
21 g / 0.2 N
|
0.12 kg / 0.27 LBS
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 LBS
89 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 LBS
54 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 LBS
36 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 LBS
25 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 90 mm |
0.00 kg / 0.00 LBS
18 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 100 mm |
0.00 kg / 0.00 LBS
13 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Hazards (electronics) - precautionary measures
MW 14x3 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 5.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 4.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 3.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 3.0 cm |
| Remote | 50 Gs (5.0 mT) | 2.5 cm |
| Payment card | 400 Gs (40.0 mT) | 1.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Impact energy (cracking risk) - collision effects
MW 14x3 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
28.91 km/h
(8.03 m/s)
|
0.11 J | |
| 30 mm |
49.34 km/h
(13.71 m/s)
|
0.32 J | |
| 50 mm |
63.69 km/h
(17.69 m/s)
|
0.54 J | |
| 100 mm |
90.07 km/h
(25.02 m/s)
|
1.08 J |
Table 9: Corrosion resistance
MW 14x3 / 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)
MW 14x3 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 4 301 Mx | 43.0 µWb |
| Pc Coefficient | 0.31 | Low (Flat) |
Table 11: Physics of underwater searching
MW 14x3 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 2.76 kg | Standard |
| Water (riverbed) |
3.16 kg
(+0.40 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Warning: On a vertical surface, the magnet holds merely ~20% of its max power.
2. Plate thickness effect
*Thin metal sheet (e.g. 0.5mm PC case) significantly reduces 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) = 0.31
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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other proposals
Strengths and weaknesses of rare earth magnets.
Strengths
- Their magnetic field is maintained, and after around 10 years it drops only by ~1% (according to research),
- They are resistant to demagnetization induced by external magnetic fields,
- By applying a reflective layer of nickel, the element has an proper look,
- They feature high magnetic induction at the operating surface, making them more effective,
- Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
- Thanks to flexibility in shaping and the capacity to modify to individual projects,
- Versatile presence in innovative solutions – they serve a role in magnetic memories, electric drive systems, precision medical tools, and modern systems.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Cons
- Brittleness is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a special holder, which not only protects them against impacts but also increases their durability
- We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- Magnets exposed to a humid environment can rust. Therefore when using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
- Limited possibility of producing threads in the magnet and complex shapes - recommended is cover - mounting mechanism.
- Potential hazard to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the context of child health protection. It is also worth noting that small components of these magnets can be problematic in diagnostics medical after entering the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Lifting parameters
Maximum lifting capacity of the magnet – what affects it?
- on a block made of mild steel, effectively closing the magnetic flux
- with a thickness no less than 10 mm
- with a plane free of scratches
- under conditions of ideal adhesion (surface-to-surface)
- under axial application of breakaway force (90-degree angle)
- at conditions approx. 20°C
What influences lifting capacity in practice
- Gap between surfaces – every millimeter of separation (caused e.g. by veneer or unevenness) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
- Direction of force – maximum parameter is available only during perpendicular pulling. The shear force of the magnet along the surface is standardly many times lower (approx. 1/5 of the lifting capacity).
- Plate thickness – insufficiently thick sheet does not close the flux, causing part of the power to be wasted into the air.
- Plate material – mild steel attracts best. Alloy steels reduce magnetic permeability and holding force.
- Surface finish – ideal contact is obtained only on smooth steel. Any scratches and bumps create air cushions, reducing force.
- Thermal factor – hot environment weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.
Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under shearing force the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate reduces the holding force.
Warnings
Beware of splinters
Protect your eyes. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. We recommend safety glasses.
Flammability
Machining of neodymium magnets poses a fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.
Threat to electronics
Data protection: Neodymium magnets can damage payment cards and delicate electronics (pacemakers, hearing aids, mechanical watches).
Threat to navigation
GPS units and smartphones are highly sensitive to magnetic fields. Direct contact with a strong magnet can decalibrate the sensors in your phone.
Choking Hazard
Adult use only. Small elements pose a choking risk, causing intestinal necrosis. Store out of reach of children and animals.
Bone fractures
Big blocks can smash fingers instantly. Never place your hand betwixt two attracting surfaces.
Handling rules
Before starting, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Be predictive.
Allergy Warning
Certain individuals have a contact allergy to Ni, which is the standard coating for NdFeB magnets. Prolonged contact might lead to an allergic reaction. We strongly advise use protective gloves.
Operating temperature
Watch the temperature. Exposing the magnet to high heat will ruin its properties and pulling force.
ICD Warning
Warning for patients: Strong magnetic fields disrupt medical devices. Maintain minimum 30 cm distance or ask another person to work with the magnets.
