MW 16x3 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010033
GTIN/EAN: 5906301810322
Diameter Ø
16 mm [±0,1 mm]
Height
3 mm [±0,1 mm]
Weight
4.52 g
Magnetization Direction
↑ axial
Load capacity
2.97 kg / 29.11 N
Magnetic Induction
217.61 mT / 2176 Gs
Coating
[NiCuNi] Nickel
1.734 ZŁ with VAT / pcs + price for transport
1.410 ZŁ net + 23% VAT / pcs
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Technical parameters - MW 16x3 / N38 - cylindrical magnet
Specification / characteristics - MW 16x3 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010033 |
| GTIN/EAN | 5906301810322 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 16 mm [±0,1 mm] |
| Height | 3 mm [±0,1 mm] |
| Weight | 4.52 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 2.97 kg / 29.11 N |
| Magnetic Induction ~ ? | 217.61 mT / 2176 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 modeling of the assembly - data
The following values represent the result of a engineering analysis. Results rely on algorithms for the class Nd2Fe14B. Operational conditions might slightly differ. Treat these data as a supplementary guide for designers.
Table 1: Static pull force (pull vs distance) - power drop
MW 16x3 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
2176 Gs
217.6 mT
|
2.97 kg / 6.55 lbs
2970.0 g / 29.1 N
|
medium risk |
| 1 mm |
2004 Gs
200.4 mT
|
2.52 kg / 5.55 lbs
2519.3 g / 24.7 N
|
medium risk |
| 2 mm |
1782 Gs
178.2 mT
|
1.99 kg / 4.39 lbs
1993.2 g / 19.6 N
|
low risk |
| 3 mm |
1543 Gs
154.3 mT
|
1.49 kg / 3.29 lbs
1494.0 g / 14.7 N
|
low risk |
| 5 mm |
1098 Gs
109.8 mT
|
0.76 kg / 1.67 lbs
756.6 g / 7.4 N
|
low risk |
| 10 mm |
439 Gs
43.9 mT
|
0.12 kg / 0.27 lbs
120.9 g / 1.2 N
|
low risk |
| 15 mm |
195 Gs
19.5 mT
|
0.02 kg / 0.05 lbs
23.9 g / 0.2 N
|
low risk |
| 20 mm |
99 Gs
9.9 mT
|
0.01 kg / 0.01 lbs
6.2 g / 0.1 N
|
low risk |
| 30 mm |
35 Gs
3.5 mT
|
0.00 kg / 0.00 lbs
0.8 g / 0.0 N
|
low risk |
| 50 mm |
8 Gs
0.8 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
low risk |
Table 2: Vertical force (wall)
MW 16x3 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.59 kg / 1.31 lbs
594.0 g / 5.8 N
|
| 1 mm | Stal (~0.2) |
0.50 kg / 1.11 lbs
504.0 g / 4.9 N
|
| 2 mm | Stal (~0.2) |
0.40 kg / 0.88 lbs
398.0 g / 3.9 N
|
| 3 mm | Stal (~0.2) |
0.30 kg / 0.66 lbs
298.0 g / 2.9 N
|
| 5 mm | Stal (~0.2) |
0.15 kg / 0.34 lbs
152.0 g / 1.5 N
|
| 10 mm | Stal (~0.2) |
0.02 kg / 0.05 lbs
24.0 g / 0.2 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.01 lbs
4.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
2.0 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: Wall mounting (shearing) - vertical pull
MW 16x3 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.89 kg / 1.96 lbs
891.0 g / 8.7 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.59 kg / 1.31 lbs
594.0 g / 5.8 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.30 kg / 0.65 lbs
297.0 g / 2.9 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.49 kg / 3.27 lbs
1485.0 g / 14.6 N
|
Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 16x3 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.30 kg / 0.65 lbs
297.0 g / 2.9 N
|
| 1 mm |
|
0.74 kg / 1.64 lbs
742.5 g / 7.3 N
|
| 2 mm |
|
1.49 kg / 3.27 lbs
1485.0 g / 14.6 N
|
| 3 mm |
|
2.23 kg / 4.91 lbs
2227.5 g / 21.9 N
|
| 5 mm |
|
2.97 kg / 6.55 lbs
2970.0 g / 29.1 N
|
| 10 mm |
|
2.97 kg / 6.55 lbs
2970.0 g / 29.1 N
|
| 11 mm |
|
2.97 kg / 6.55 lbs
2970.0 g / 29.1 N
|
| 12 mm |
|
2.97 kg / 6.55 lbs
2970.0 g / 29.1 N
|
Table 5: Working in heat (stability) - resistance threshold
MW 16x3 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
2.97 kg / 6.55 lbs
2970.0 g / 29.1 N
|
OK |
| 40 °C | -2.2% |
2.90 kg / 6.40 lbs
2904.7 g / 28.5 N
|
OK |
| 60 °C | -4.4% |
2.84 kg / 6.26 lbs
2839.3 g / 27.9 N
|
|
| 80 °C | -6.6% |
2.77 kg / 6.12 lbs
2774.0 g / 27.2 N
|
|
| 100 °C | -28.8% |
2.11 kg / 4.66 lbs
2114.6 g / 20.7 N
|
Table 6: Two magnets (repulsion) - forces in the system
MW 16x3 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
5.87 kg / 12.93 lbs
3 716 Gs
|
0.88 kg / 1.94 lbs
880 g / 8.6 N
|
N/A |
| 1 mm |
5.46 kg / 12.03 lbs
4 197 Gs
|
0.82 kg / 1.80 lbs
819 g / 8.0 N
|
4.91 kg / 10.83 lbs
~0 Gs
|
| 2 mm |
4.98 kg / 10.97 lbs
4 007 Gs
|
0.75 kg / 1.65 lbs
746 g / 7.3 N
|
4.48 kg / 9.87 lbs
~0 Gs
|
| 3 mm |
4.46 kg / 9.83 lbs
3 794 Gs
|
0.67 kg / 1.48 lbs
669 g / 6.6 N
|
4.01 kg / 8.85 lbs
~0 Gs
|
| 5 mm |
3.43 kg / 7.56 lbs
3 326 Gs
|
0.51 kg / 1.13 lbs
514 g / 5.0 N
|
3.09 kg / 6.80 lbs
~0 Gs
|
| 10 mm |
1.49 kg / 3.30 lbs
2 196 Gs
|
0.22 kg / 0.49 lbs
224 g / 2.2 N
|
1.35 kg / 2.97 lbs
~0 Gs
|
| 20 mm |
0.24 kg / 0.53 lbs
878 Gs
|
0.04 kg / 0.08 lbs
36 g / 0.4 N
|
0.21 kg / 0.47 lbs
~0 Gs
|
| 50 mm |
0.00 kg / 0.01 lbs
113 Gs
|
0.00 kg / 0.00 lbs
1 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 lbs
70 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
46 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
32 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
23 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
17 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 16x3 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 6.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 5.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 4.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 3.0 cm |
| Car key | 50 Gs (5.0 mT) | 3.0 cm |
| Payment card | 400 Gs (40.0 mT) | 1.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Dynamics (cracking risk) - warning
MW 16x3 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
26.50 km/h
(7.36 m/s)
|
0.12 J | |
| 30 mm |
44.78 km/h
(12.44 m/s)
|
0.35 J | |
| 50 mm |
57.81 km/h
(16.06 m/s)
|
0.58 J | |
| 100 mm |
81.75 km/h
(22.71 m/s)
|
1.17 J |
Table 9: Corrosion resistance
MW 16x3 / 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 16x3 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 5 141 Mx | 51.4 µWb |
| Pc Coefficient | 0.27 | Low (Flat) |
Table 11: Physics of underwater searching
MW 16x3 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 2.97 kg | Standard |
| Water (riverbed) |
3.40 kg
(+0.43 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Warning: On a vertical wall, the magnet retains just approx. 20-30% of its max power.
2. Steel thickness impact
*Thin metal sheet (e.g. 0.5mm PC case) drastically weakens the holding force.
3. Thermal stability
*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) = 0.27
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other offers
Advantages as well as disadvantages of neodymium magnets.
Benefits
- They have stable power, and over around ten years their attraction force decreases symbolically – ~1% (according to theory),
- They possess excellent resistance to magnetic field loss when exposed to external magnetic sources,
- By applying a shiny layer of nickel, the element presents an modern look,
- Magnets exhibit impressive magnetic induction on the outer side,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
- Due to the possibility of flexible shaping and adaptation to custom needs, NdFeB magnets can be produced in a variety of geometric configurations, which amplifies use scope,
- Universal use in innovative solutions – they are utilized in HDD drives, brushless drives, medical equipment, as well as modern systems.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Cons
- Brittleness is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a special holder, which not only secures them against impacts but also increases their durability
- Neodymium magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
- They rust in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- Limited ability of producing threads in the magnet and complicated shapes - recommended is a housing - magnet mounting.
- Health risk related to microscopic parts of magnets are risky, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that small components of these products can disrupt the diagnostic process medical in case of swallowing.
- Due to complex production process, their price is relatively high,
Holding force characteristics
Best holding force of the magnet in ideal parameters – what affects it?
- with the contact of a yoke made of low-carbon steel, guaranteeing maximum field concentration
- whose transverse dimension equals approx. 10 mm
- characterized by smoothness
- without the slightest insulating layer between the magnet and steel
- for force acting at a right angle (in the magnet axis)
- in temp. approx. 20°C
Lifting capacity in practice – influencing factors
- Gap between surfaces – every millimeter of distance (caused e.g. by varnish or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
- Force direction – catalog parameter refers to pulling vertically. When applying parallel force, the magnet exhibits much less (often approx. 20-30% of maximum force).
- Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the attraction force (the magnet "punches through" it).
- Chemical composition of the base – low-carbon steel attracts best. Alloy admixtures decrease magnetic properties and holding force.
- Plate texture – smooth surfaces guarantee perfect abutment, which improves field saturation. Rough surfaces reduce efficiency.
- Temperature influence – hot environment weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under perpendicular forces, in contrast under attempts to slide the magnet the holding force is lower. In addition, even a minimal clearance between the magnet’s surface and the plate decreases the holding force.
Warnings
Combustion hazard
Fire warning: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this risks ignition.
Safe distance
Powerful magnetic fields can corrupt files on payment cards, HDDs, and storage devices. Keep a distance of at least 10 cm.
Demagnetization risk
Regular neodymium magnets (N-type) lose power when the temperature surpasses 80°C. The loss of strength is permanent.
Allergy Warning
Warning for allergy sufferers: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction happens, immediately stop handling magnets and use protective gear.
Keep away from children
These products are not toys. Accidental ingestion of several magnets can lead to them connecting inside the digestive tract, which poses a severe health hazard and necessitates urgent medical intervention.
Warning for heart patients
Medical warning: Neodymium magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.
Hand protection
Pinching hazard: The attraction force is so immense that it can result in blood blisters, pinching, and broken bones. Protective gloves are recommended.
Precision electronics
Navigation devices and smartphones are highly sensitive to magnetism. Direct contact with a strong magnet can ruin the internal compass in your phone.
Caution required
Before use, read the rules. Sudden snapping can break the magnet or injure your hand. Think ahead.
Magnet fragility
Despite the nickel coating, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.
