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
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
1.500 zł net / pcs
1.845 zł with VAT (23% VAT) / pcs
bulk discounts:
Need more?Frequently asked questions
What is the maximum working temperature of a disc magnet?
What is the difference between N38, N42 and N52?
What is the dimensional tolerance?
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.
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Technical - 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 | 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 |
Engineering simulation of the product - data
The following values represent the direct effect of a mathematical simulation. Values are based on algorithms for the material Nd2Fe14B. Actual performance may differ. Please consider these calculations as a preliminary roadmap for designers.
Table 1: Static force (pull vs distance) - 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
|
weak grip |
| 3 mm |
1593 Gs
159.3 mT
|
1.18 kg / 2.59 lbs
1175.5 g / 11.5 N
|
weak grip |
| 5 mm |
1062 Gs
106.2 mT
|
0.52 kg / 1.15 lbs
523.0 g / 5.1 N
|
weak grip |
| 10 mm |
380 Gs
38.0 mT
|
0.07 kg / 0.15 lbs
66.8 g / 0.7 N
|
weak grip |
| 15 mm |
160 Gs
16.0 mT
|
0.01 kg / 0.03 lbs
11.9 g / 0.1 N
|
weak grip |
| 20 mm |
79 Gs
7.9 mT
|
0.00 kg / 0.01 lbs
2.9 g / 0.0 N
|
weak grip |
| 30 mm |
27 Gs
2.7 mT
|
0.00 kg / 0.00 lbs
0.3 g / 0.0 N
|
weak grip |
| 50 mm |
7 Gs
0.7 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
weak grip |
Table 2: Sliding hold (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) - vertical pull
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: Material efficiency (substrate influence) - sheet metal selection
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: Thermal resistance (stability) - 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 (attraction) - forces in the system
MW 14x3 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding 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: Protective zones (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 |
| Mobile device | 40 Gs (4.0 mT) | 3.0 cm |
| Car key | 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) - warning
MW 14x3 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
25.14 km/h
(6.98 m/s)
|
0.08 J | |
| 30 mm |
25.43 km/h
(7.06 m/s)
|
0.09 J | |
| 50 mm |
25.43 km/h
(7.06 m/s)
|
0.09 J | |
| 100 mm |
25.43 km/h
(7.06 m/s)
|
0.09 J |
Table 9: Anti-corrosion coating durability
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. Vertical hold
*Warning: On a vertical surface, the magnet holds just a fraction of its max power.
2. Steel saturation
*Thin steel (e.g. 0.5mm PC case) severely weakens the holding force.
3. Temperature resistance
*For N38 material, the max working temp 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.
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
Pros and cons of neodymium magnets.
Benefits
- They have stable power, and over nearly ten years their attraction force decreases symbolically – ~1% (in testing),
- They have excellent resistance to magnetic field loss when exposed to external magnetic sources,
- By using a reflective coating of silver, the element gains an modern look,
- Magnets are characterized by huge magnetic induction on the outer layer,
- 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 versatility in constructing and the ability to customize to client solutions,
- Huge importance in innovative solutions – they find application in mass storage devices, brushless drives, diagnostic systems, also multitasking production systems.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which makes them useful in small systems
Cons
- To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
- 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.
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
- Due to limitations in creating nuts and complicated forms in magnets, we propose using cover - magnetic mount.
- Potential hazard 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 components of these products can be problematic in diagnostics medical in case of swallowing.
- Due to neodymium price, their price is higher than average,
Lifting parameters
Magnetic strength at its maximum – what it depends on?
- using a base made of low-carbon steel, acting as a ideal flux conductor
- possessing a thickness of at least 10 mm to avoid saturation
- with a plane free of scratches
- under conditions of no distance (surface-to-surface)
- for force applied at a right angle (pull-off, not shear)
- at temperature room level
Lifting capacity in real conditions – factors
- Space between surfaces – every millimeter of distance (caused e.g. by veneer or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
- Force direction – note that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the maximum value.
- Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
- Chemical composition of the base – mild steel gives the best results. Alloy admixtures decrease magnetic properties and lifting capacity.
- Surface quality – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
- Thermal environment – temperature increase results in weakening of force. It is worth remembering the thermal limit for a given model.
Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, whereas under parallel forces the load capacity is reduced by as much as fivefold. In addition, even a minimal clearance between the magnet’s surface and the plate reduces the holding force.
Precautions when working with neodymium magnets
Allergic reactions
Some people suffer from a hypersensitivity to nickel, which is the common plating for NdFeB magnets. Frequent touching can result in skin redness. We recommend use protective gloves.
No play value
These products are not toys. Swallowing several magnets may result in them pinching intestinal walls, which poses a severe health hazard and necessitates immediate surgery.
Power loss in heat
Avoid heat. NdFeB magnets are susceptible to heat. If you require operation above 80°C, look for HT versions (H, SH, UH).
Impact on smartphones
GPS units and mobile phones are extremely sensitive to magnetic fields. Close proximity with a powerful NdFeB magnet can decalibrate the internal compass in your phone.
Combustion hazard
Combustion risk: Rare earth powder is explosive. Avoid machining magnets in home conditions as this risks ignition.
Hand protection
Big blocks can smash fingers in a fraction of a second. Under no circumstances put your hand between two attracting surfaces.
Medical implants
Health Alert: Neodymium magnets can deactivate heart devices and defibrillators. Stay away if you have electronic implants.
Shattering risk
Neodymium magnets are sintered ceramics, which means they are prone to chipping. Clashing of two magnets will cause them cracking into shards.
Electronic devices
Device Safety: Neodymium magnets can ruin payment cards and delicate electronics (pacemakers, medical aids, mechanical watches).
Conscious usage
Be careful. Rare earth magnets attract from a distance and connect with massive power, often quicker than you can move away.
