MW 24x6 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010048
GTIN/EAN: 5906301810476
Diameter Ø
24 mm [±0,1 mm]
Height
6 mm [±0,1 mm]
Weight
20.36 g
Magnetization Direction
↑ axial
Load capacity
9.98 kg / 97.88 N
Magnetic Induction
277.18 mT / 2772 Gs
Coating
[Zn] Zinc
5.10 ZŁ with VAT / pcs + price for transport
4.15 ZŁ net + 23% VAT / pcs
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Technical - MW 24x6 / N38 - cylindrical magnet
Specification / characteristics - MW 24x6 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010048 |
| GTIN/EAN | 5906301810476 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 24 mm [±0,1 mm] |
| Height | 6 mm [±0,1 mm] |
| Weight | 20.36 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 9.98 kg / 97.88 N |
| Magnetic Induction ~ ? | 277.18 mT / 2772 Gs |
| Coating | [Zn] Zinc |
| 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 magnet - technical parameters
Presented information constitute the direct effect of a mathematical simulation. Values are based on algorithms for the material Nd2Fe14B. Operational conditions might slightly differ. Use these data as a supplementary guide during assembly planning.
Table 1: Static pull force (force vs distance) - interaction chart
MW 24x6 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
2771 Gs
277.1 mT
|
9.98 kg / 22.00 lbs
9980.0 g / 97.9 N
|
warning |
| 1 mm |
2609 Gs
260.9 mT
|
8.85 kg / 19.50 lbs
8846.4 g / 86.8 N
|
warning |
| 2 mm |
2420 Gs
242.0 mT
|
7.61 kg / 16.78 lbs
7609.6 g / 74.7 N
|
warning |
| 3 mm |
2216 Gs
221.6 mT
|
6.38 kg / 14.07 lbs
6383.0 g / 62.6 N
|
warning |
| 5 mm |
1805 Gs
180.5 mT
|
4.23 kg / 9.33 lbs
4233.2 g / 41.5 N
|
warning |
| 10 mm |
991 Gs
99.1 mT
|
1.28 kg / 2.81 lbs
1275.9 g / 12.5 N
|
low risk |
| 15 mm |
542 Gs
54.2 mT
|
0.38 kg / 0.84 lbs
381.4 g / 3.7 N
|
low risk |
| 20 mm |
313 Gs
31.3 mT
|
0.13 kg / 0.28 lbs
127.2 g / 1.2 N
|
low risk |
| 30 mm |
125 Gs
12.5 mT
|
0.02 kg / 0.04 lbs
20.4 g / 0.2 N
|
low risk |
| 50 mm |
34 Gs
3.4 mT
|
0.00 kg / 0.00 lbs
1.5 g / 0.0 N
|
low risk |
Table 2: Shear capacity (vertical surface)
MW 24x6 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
2.00 kg / 4.40 lbs
1996.0 g / 19.6 N
|
| 1 mm | Stal (~0.2) |
1.77 kg / 3.90 lbs
1770.0 g / 17.4 N
|
| 2 mm | Stal (~0.2) |
1.52 kg / 3.36 lbs
1522.0 g / 14.9 N
|
| 3 mm | Stal (~0.2) |
1.28 kg / 2.81 lbs
1276.0 g / 12.5 N
|
| 5 mm | Stal (~0.2) |
0.85 kg / 1.87 lbs
846.0 g / 8.3 N
|
| 10 mm | Stal (~0.2) |
0.26 kg / 0.56 lbs
256.0 g / 2.5 N
|
| 15 mm | Stal (~0.2) |
0.08 kg / 0.17 lbs
76.0 g / 0.7 N
|
| 20 mm | Stal (~0.2) |
0.03 kg / 0.06 lbs
26.0 g / 0.3 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.01 lbs
4.0 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 24x6 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
2.99 kg / 6.60 lbs
2994.0 g / 29.4 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
2.00 kg / 4.40 lbs
1996.0 g / 19.6 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
1.00 kg / 2.20 lbs
998.0 g / 9.8 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
4.99 kg / 11.00 lbs
4990.0 g / 49.0 N
|
Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 24x6 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
1.00 kg / 2.20 lbs
998.0 g / 9.8 N
|
| 1 mm |
|
2.50 kg / 5.50 lbs
2495.0 g / 24.5 N
|
| 2 mm |
|
4.99 kg / 11.00 lbs
4990.0 g / 49.0 N
|
| 3 mm |
|
7.49 kg / 16.50 lbs
7485.0 g / 73.4 N
|
| 5 mm |
|
9.98 kg / 22.00 lbs
9980.0 g / 97.9 N
|
| 10 mm |
|
9.98 kg / 22.00 lbs
9980.0 g / 97.9 N
|
| 11 mm |
|
9.98 kg / 22.00 lbs
9980.0 g / 97.9 N
|
| 12 mm |
|
9.98 kg / 22.00 lbs
9980.0 g / 97.9 N
|
Table 5: Thermal resistance (stability) - resistance threshold
MW 24x6 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
9.98 kg / 22.00 lbs
9980.0 g / 97.9 N
|
OK |
| 40 °C | -2.2% |
9.76 kg / 21.52 lbs
9760.4 g / 95.7 N
|
OK |
| 60 °C | -4.4% |
9.54 kg / 21.03 lbs
9540.9 g / 93.6 N
|
|
| 80 °C | -6.6% |
9.32 kg / 20.55 lbs
9321.3 g / 91.4 N
|
|
| 100 °C | -28.8% |
7.11 kg / 15.67 lbs
7105.8 g / 69.7 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 24x6 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
21.42 kg / 47.22 lbs
4 381 Gs
|
3.21 kg / 7.08 lbs
3213 g / 31.5 N
|
N/A |
| 1 mm |
20.25 kg / 44.65 lbs
5 390 Gs
|
3.04 kg / 6.70 lbs
3038 g / 29.8 N
|
18.23 kg / 40.19 lbs
~0 Gs
|
| 2 mm |
18.99 kg / 41.86 lbs
5 218 Gs
|
2.85 kg / 6.28 lbs
2848 g / 27.9 N
|
17.09 kg / 37.67 lbs
~0 Gs
|
| 3 mm |
17.67 kg / 38.95 lbs
5 034 Gs
|
2.65 kg / 5.84 lbs
2650 g / 26.0 N
|
15.90 kg / 35.06 lbs
~0 Gs
|
| 5 mm |
15.00 kg / 33.07 lbs
4 638 Gs
|
2.25 kg / 4.96 lbs
2250 g / 22.1 N
|
13.50 kg / 29.76 lbs
~0 Gs
|
| 10 mm |
9.09 kg / 20.03 lbs
3 610 Gs
|
1.36 kg / 3.00 lbs
1363 g / 13.4 N
|
8.18 kg / 18.03 lbs
~0 Gs
|
| 20 mm |
2.74 kg / 6.04 lbs
1 982 Gs
|
0.41 kg / 0.91 lbs
411 g / 4.0 N
|
2.46 kg / 5.43 lbs
~0 Gs
|
| 50 mm |
0.10 kg / 0.23 lbs
385 Gs
|
0.02 kg / 0.03 lbs
15 g / 0.2 N
|
0.09 kg / 0.21 lbs
~0 Gs
|
| 60 mm |
0.04 kg / 0.10 lbs
251 Gs
|
0.01 kg / 0.01 lbs
7 g / 0.1 N
|
0.04 kg / 0.09 lbs
~0 Gs
|
| 70 mm |
0.02 kg / 0.04 lbs
171 Gs
|
0.00 kg / 0.01 lbs
3 g / 0.0 N
|
0.02 kg / 0.04 lbs
~0 Gs
|
| 80 mm |
0.01 kg / 0.02 lbs
121 Gs
|
0.00 kg / 0.00 lbs
2 g / 0.0 N
|
0.01 kg / 0.02 lbs
~0 Gs
|
| 90 mm |
0.01 kg / 0.01 lbs
89 Gs
|
0.00 kg / 0.00 lbs
1 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 100 mm |
0.00 kg / 0.01 lbs
67 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
Table 7: Protective zones (implants) - precautionary measures
MW 24x6 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 10.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 8.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 6.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 5.0 cm |
| Remote | 50 Gs (5.0 mT) | 4.5 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 (kinetic energy) - collision effects
MW 24x6 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
24.05 km/h
(6.68 m/s)
|
0.45 J | |
| 30 mm |
38.72 km/h
(10.76 m/s)
|
1.18 J | |
| 50 mm |
49.93 km/h
(13.87 m/s)
|
1.96 J | |
| 100 mm |
70.61 km/h
(19.61 m/s)
|
3.92 J |
Table 9: Corrosion resistance
MW 24x6 / N38
| Technical parameter | Value / Description |
|---|---|
| Coating type | [Zn] Zinc |
| Layer structure | Zn (Zinc) |
| Layer thickness | 8-15 µm |
| Salt spray test (SST) ? | 48 h |
| Recommended environment | Indoors / Garage |
Table 10: Construction data (Pc)
MW 24x6 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 13 932 Mx | 139.3 µWb |
| Pc Coefficient | 0.35 | Low (Flat) |
Table 11: Physics of underwater searching
MW 24x6 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 9.98 kg | Standard |
| Water (riverbed) |
11.43 kg
(+1.45 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Note: On a vertical surface, the magnet holds only approx. 20-30% of its nominal pull.
2. Steel saturation
*Thin steel (e.g. computer case) significantly weakens the holding force.
3. Heat tolerance
*For N38 material, the critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.35
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.
Elemental analysis
| 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 |
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Advantages and disadvantages of neodymium magnets.
Benefits
- They do not lose magnetism, even over around ten years – the decrease in power is only ~1% (based on measurements),
- Neodymium magnets are characterized by remarkably resistant to demagnetization caused by magnetic disturbances,
- The use of an metallic finish of noble metals (nickel, gold, silver) causes the element to have aesthetics,
- Neodymium magnets ensure maximum magnetic induction on a their surface, which increases force concentration,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
- Possibility of individual modeling as well as adapting to individual needs,
- Universal use in electronics industry – they are commonly used in computer drives, electromotive mechanisms, medical devices, and complex engineering applications.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Weaknesses
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only protects the magnet but also improves its resistance to damage
- Neodymium magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (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 very resistant to heat
- When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
- We recommend casing - magnetic mount, due to difficulties in creating threads inside the magnet and complicated forms.
- Health risk resulting from small fragments of magnets are risky, when accidentally swallowed, which is particularly important in the context of child health protection. Additionally, small elements of these magnets are able to disrupt the diagnostic process medical in case of swallowing.
- Due to expensive raw materials, their price is higher than average,
Lifting parameters
Breakaway strength of the magnet in ideal conditions – what it depends on?
- on a base made of structural steel, perfectly concentrating the magnetic flux
- possessing a thickness of min. 10 mm to ensure full flux closure
- characterized by even structure
- with zero gap (no impurities)
- for force acting at a right angle (in the magnet axis)
- at standard ambient temperature
Magnet lifting force in use – key factors
- Air gap (betwixt the magnet and the plate), since even a very small distance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
- Loading method – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet exhibits much less (typically approx. 20-30% of nominal force).
- Plate thickness – too thin sheet does not accept the full field, causing part of the flux to be lost to the other side.
- Material type – ideal substrate is pure iron steel. Cast iron may generate lower lifting capacity.
- Surface condition – ground elements guarantee perfect abutment, which improves force. Rough surfaces reduce efficiency.
- Temperature – temperature increase causes a temporary drop of induction. Check the maximum operating temperature for a given model.
Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas under attempts to slide the magnet the holding force is lower. In addition, even a slight gap between the magnet and the plate lowers the holding force.
Safe handling of neodymium magnets
Magnet fragility
Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Avoid impacts, as the magnet may shatter into hazardous fragments.
Combustion hazard
Machining of neodymium magnets poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.
Electronic devices
Avoid bringing magnets close to a wallet, computer, or screen. The magnetism can irreversibly ruin these devices and erase data from cards.
Power loss in heat
Control the heat. Heating the magnet above 80 degrees Celsius will ruin its properties and pulling force.
Swallowing risk
Absolutely store magnets away from children. Choking hazard is high, and the consequences of magnets clamping inside the body are fatal.
Pacemakers
Patients with a heart stimulator should maintain an large gap from magnets. The magnetic field can disrupt the functioning of the life-saving device.
Impact on smartphones
An intense magnetic field disrupts the functioning of compasses in smartphones and GPS navigation. Do not bring magnets close to a smartphone to avoid damaging the sensors.
Pinching danger
Mind your fingers. Two large magnets will join instantly with a force of massive weight, crushing everything in their path. Be careful!
Respect the power
Handle magnets consciously. Their immense force can shock even experienced users. Be vigilant and respect their force.
Skin irritation risks
A percentage of the population have a hypersensitivity to nickel, which is the common plating for NdFeB magnets. Prolonged contact can result in dermatitis. We strongly advise use protective gloves.
