MW 5x5 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010503
GTIN/EAN: 5906301814979
Diameter Ø
5 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
0.74 g
Magnetization Direction
↑ axial
Load capacity
0.79 kg / 7.76 N
Magnetic Induction
553.14 mT / 5531 Gs
Coating
[NiCuNi] Nickel
0.394 ZŁ with VAT / pcs + price for transport
0.320 ZŁ net + 23% VAT / pcs
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Technical - MW 5x5 / N38 - cylindrical magnet
Specification / characteristics - MW 5x5 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010503 |
| GTIN/EAN | 5906301814979 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 5 mm [±0,1 mm] |
| Height | 5 mm [±0,1 mm] |
| Weight | 0.74 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.79 kg / 7.76 N |
| Magnetic Induction ~ ? | 553.14 mT / 5531 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 - technical parameters
The following data are the direct effect of a engineering calculation. Results are based on models for the class Nd2Fe14B. Operational conditions may differ from theoretical values. Please consider these data as a reference point for designers.
Table 1: Static force (force vs distance) - power drop
MW 5x5 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
5523 Gs
552.3 mT
|
0.79 kg / 1.74 pounds
790.0 g / 7.7 N
|
safe |
| 1 mm |
3420 Gs
342.0 mT
|
0.30 kg / 0.67 pounds
303.0 g / 3.0 N
|
safe |
| 2 mm |
1966 Gs
196.6 mT
|
0.10 kg / 0.22 pounds
100.1 g / 1.0 N
|
safe |
| 3 mm |
1155 Gs
115.5 mT
|
0.03 kg / 0.08 pounds
34.5 g / 0.3 N
|
safe |
| 5 mm |
469 Gs
46.9 mT
|
0.01 kg / 0.01 pounds
5.7 g / 0.1 N
|
safe |
| 10 mm |
101 Gs
10.1 mT
|
0.00 kg / 0.00 pounds
0.3 g / 0.0 N
|
safe |
| 15 mm |
36 Gs
3.6 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
| 20 mm |
17 Gs
1.7 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
| 30 mm |
6 Gs
0.6 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
| 50 mm |
1 Gs
0.1 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
Table 2: Slippage hold (wall)
MW 5x5 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.16 kg / 0.35 pounds
158.0 g / 1.5 N
|
| 1 mm | Stal (~0.2) |
0.06 kg / 0.13 pounds
60.0 g / 0.6 N
|
| 2 mm | Stal (~0.2) |
0.02 kg / 0.04 pounds
20.0 g / 0.2 N
|
| 3 mm | Stal (~0.2) |
0.01 kg / 0.01 pounds
6.0 g / 0.1 N
|
| 5 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
2.0 g / 0.0 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 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: Wall mounting (sliding) - vertical pull
MW 5x5 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.24 kg / 0.52 pounds
237.0 g / 2.3 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.16 kg / 0.35 pounds
158.0 g / 1.5 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.08 kg / 0.17 pounds
79.0 g / 0.8 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.40 kg / 0.87 pounds
395.0 g / 3.9 N
|
Table 4: Material efficiency (saturation) - power losses
MW 5x5 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.08 kg / 0.17 pounds
79.0 g / 0.8 N
|
| 1 mm |
|
0.20 kg / 0.44 pounds
197.5 g / 1.9 N
|
| 2 mm |
|
0.40 kg / 0.87 pounds
395.0 g / 3.9 N
|
| 3 mm |
|
0.59 kg / 1.31 pounds
592.5 g / 5.8 N
|
| 5 mm |
|
0.79 kg / 1.74 pounds
790.0 g / 7.7 N
|
| 10 mm |
|
0.79 kg / 1.74 pounds
790.0 g / 7.7 N
|
| 11 mm |
|
0.79 kg / 1.74 pounds
790.0 g / 7.7 N
|
| 12 mm |
|
0.79 kg / 1.74 pounds
790.0 g / 7.7 N
|
Table 5: Thermal resistance (stability) - thermal limit
MW 5x5 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.79 kg / 1.74 pounds
790.0 g / 7.7 N
|
OK |
| 40 °C | -2.2% |
0.77 kg / 1.70 pounds
772.6 g / 7.6 N
|
OK |
| 60 °C | -4.4% |
0.76 kg / 1.67 pounds
755.2 g / 7.4 N
|
OK |
| 80 °C | -6.6% |
0.74 kg / 1.63 pounds
737.9 g / 7.2 N
|
|
| 100 °C | -28.8% |
0.56 kg / 1.24 pounds
562.5 g / 5.5 N
|
Table 6: Magnet-Magnet interaction (attraction) - field range
MW 5x5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
3.69 kg / 8.14 pounds
5 990 Gs
|
0.55 kg / 1.22 pounds
554 g / 5.4 N
|
N/A |
| 1 mm |
2.37 kg / 5.23 pounds
8 857 Gs
|
0.36 kg / 0.79 pounds
356 g / 3.5 N
|
2.14 kg / 4.71 pounds
~0 Gs
|
| 2 mm |
1.42 kg / 3.12 pounds
6 841 Gs
|
0.21 kg / 0.47 pounds
212 g / 2.1 N
|
1.27 kg / 2.81 pounds
~0 Gs
|
| 3 mm |
0.82 kg / 1.80 pounds
5 194 Gs
|
0.12 kg / 0.27 pounds
122 g / 1.2 N
|
0.73 kg / 1.62 pounds
~0 Gs
|
| 5 mm |
0.27 kg / 0.60 pounds
2 996 Gs
|
0.04 kg / 0.09 pounds
41 g / 0.4 N
|
0.24 kg / 0.54 pounds
~0 Gs
|
| 10 mm |
0.03 kg / 0.06 pounds
939 Gs
|
0.00 kg / 0.01 pounds
4 g / 0.0 N
|
0.02 kg / 0.05 pounds
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 pounds
202 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
19 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 pounds
11 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 pounds
7 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
5 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
4 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
3 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Hazards (implants) - precautionary measures
MW 5x5 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 3.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 2.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 2.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 1.5 cm |
| Remote | 50 Gs (5.0 mT) | 1.5 cm |
| Payment card | 400 Gs (40.0 mT) | 1.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 0.5 cm |
Table 8: Collisions (kinetic energy) - collision effects
MW 5x5 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
32.96 km/h
(9.16 m/s)
|
0.03 J | |
| 30 mm |
57.07 km/h
(15.85 m/s)
|
0.09 J | |
| 50 mm |
73.68 km/h
(20.47 m/s)
|
0.15 J | |
| 100 mm |
104.20 km/h
(28.95 m/s)
|
0.31 J |
Table 9: Corrosion resistance
MW 5x5 / 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 (Flux)
MW 5x5 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 1 120 Mx | 11.2 µWb |
| Pc Coefficient | 0.89 | High (Stable) |
Table 11: Hydrostatics and buoyancy
MW 5x5 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.79 kg | Standard |
| Water (riverbed) |
0.90 kg
(+0.11 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Warning: On a vertical surface, the magnet retains merely ~20% of its max power.
2. Plate thickness effect
*Thin steel (e.g. computer case) severely limits the holding force.
3. Temperature resistance
*For N38 grade, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.89
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
Advantages and disadvantages of neodymium magnets.
Pros
- They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (in laboratory conditions),
- They do not lose their magnetic properties even under close interference source,
- In other words, due to the aesthetic layer of silver, the element gains visual value,
- Magnetic induction on the working layer of the magnet remains very high,
- Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
- Possibility of custom modeling as well as adapting to specific needs,
- Wide application in advanced technology sectors – they are utilized in mass storage devices, electric motors, medical devices, also other advanced devices.
- Thanks to their power density, small magnets offer high operating force, occupying minimum space,
Weaknesses
- To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
- When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength 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
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
- Due to limitations in creating threads and complex shapes in magnets, we propose using casing - magnetic mechanism.
- Potential hazard related to microscopic parts of magnets can be dangerous, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Additionally, small components of these devices are able to be problematic in diagnostics medical after entering the body.
- Due to expensive raw materials, their price is higher than average,
Lifting parameters
Detachment force of the magnet in optimal conditions – what it depends on?
- using a sheet made of mild steel, acting as a magnetic yoke
- whose thickness equals approx. 10 mm
- characterized by even structure
- with total lack of distance (without impurities)
- for force acting at a right angle (in the magnet axis)
- at temperature room level
What influences lifting capacity in practice
- Gap between magnet and steel – every millimeter of distance (caused e.g. by veneer or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
- Load vector – highest force is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is standardly several times lower (approx. 1/5 of the lifting capacity).
- Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
- Material type – ideal substrate is high-permeability steel. Stainless steels may attract less.
- Surface condition – smooth surfaces guarantee perfect abutment, which increases field saturation. Uneven metal reduce efficiency.
- Thermal environment – heating the magnet results in weakening of force. It is worth remembering the thermal limit for a given model.
Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, whereas under attempts to slide the magnet the load capacity is reduced by as much as 75%. In addition, even a small distance between the magnet’s surface and the plate lowers the load capacity.
Safe handling of neodymium magnets
Phone sensors
Navigation devices and mobile phones are extremely susceptible to magnetic fields. Close proximity with a strong magnet can ruin the internal compass in your phone.
Choking Hazard
Adult use only. Small elements can be swallowed, causing severe trauma. Keep out of reach of kids and pets.
Risk of cracking
NdFeB magnets are sintered ceramics, which means they are fragile like glass. Clashing of two magnets leads to them shattering into shards.
ICD Warning
Health Alert: Neodymium magnets can turn off pacemakers and defibrillators. Stay away if you have medical devices.
Bone fractures
Watch your fingers. Two large magnets will snap together instantly with a force of massive weight, destroying everything in their path. Exercise extreme caution!
Do not underestimate power
Handle magnets with awareness. Their immense force can surprise even experienced users. Stay alert and do not underestimate their power.
Keep away from computers
Avoid bringing magnets near a purse, laptop, or TV. The magnetism can irreversibly ruin these devices and wipe information from cards.
Thermal limits
Do not overheat. NdFeB magnets are sensitive to temperature. If you need operation above 80°C, ask us about HT versions (H, SH, UH).
Nickel coating and allergies
Medical facts indicate that nickel (the usual finish) is a strong allergen. If your skin reacts to metals, refrain from direct skin contact or select coated magnets.
Mechanical processing
Dust created during machining of magnets is flammable. Do not drill into magnets unless you are an expert.
