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
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
0.320 zł net / pcs
0.394 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 of the product - 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 |
|---|---|---|
| Remanence Br ? | 12.2-12.6 | kGs |
| Remanence Br ? | 1220-1260 | mT |
| Coercivity bHc ? | 10.8-11.5 | kOe |
| Coercivity bHc ? | 860-915 | kA/m |
| Intrinsic coercivity iHc | ≥ 12 | kOe |
| Intrinsic coercivity iHc | ≥ 955 | kA/m |
| Energy product BHmax ? | 36-38 | BH max MGOe |
| Energy product BHmax ? | 287-303 | BH max KJ/m |
| Maximum working 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 |
Technical simulation of the magnet - report
These values are the result of a physical analysis. Values are based on algorithms for the class Nd2Fe14B. Real-world conditions might slightly differ. Use these calculations as a preliminary roadmap during assembly planning.
Table 1: Static force (pull vs gap) - 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: Sliding load (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: Vertical assembly (shearing) - behavior on slippery surfaces
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: Steel thickness (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) - power drop
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 collision
MW 5x5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral 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 |
| Timepiece | 20 Gs (2.0 mT) | 2.0 cm |
| Mobile device | 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: Impact energy (cracking risk) - collision effects
MW 5x5 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
16.64 km/h
(4.62 m/s)
|
0.01 J | |
| 30 mm |
16.65 km/h
(4.62 m/s)
|
0.01 J | |
| 50 mm |
16.65 km/h
(4.62 m/s)
|
0.01 J | |
| 100 mm |
16.65 km/h
(4.62 m/s)
|
0.01 J |
Table 9: Surface protection spec
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: Submerged application
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. Shear force
*Warning: On a vertical wall, the magnet retains just a fraction of its perpendicular strength.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) significantly reduces the holding force.
3. Thermal stability
*For N38 material, 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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other products
Strengths as well as weaknesses of rare earth magnets.
Strengths
- They retain attractive force for almost 10 years – the drop is just ~1% (in theory),
- They maintain their magnetic properties even under close interference source,
- In other words, due to the aesthetic surface of nickel, the element is aesthetically pleasing,
- They feature high magnetic induction at the operating surface, which increases their power,
- Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
- Thanks to versatility in constructing and the capacity to adapt to specific needs,
- Wide application in innovative solutions – they are used in hard drives, electric motors, precision medical tools, as well as technologically advanced constructions.
- Thanks to their power density, small magnets offer high operating force, occupying minimum space,
Limitations
- They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
- We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
- Magnets exposed to a humid environment can rust. Therefore when using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
- Limited ability of producing threads in the magnet and complicated shapes - preferred is cover - magnetic holder.
- Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child safety. It is also worth noting that tiny parts of these magnets can disrupt the diagnostic process medical in case of swallowing.
- With large orders the cost of neodymium magnets can be a barrier,
Lifting parameters
Maximum lifting force for a neodymium magnet – what it depends on?
- using a plate made of low-carbon steel, functioning as a ideal flux conductor
- whose thickness reaches at least 10 mm
- with a plane cleaned and smooth
- with total lack of distance (without impurities)
- during pulling in a direction vertical to the plane
- in stable room temperature
Practical aspects of lifting capacity – factors
- Gap between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) diminishes the pulling force, often by half at just 0.5 mm.
- Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
- Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
- Steel grade – ideal substrate is pure iron steel. Cast iron may attract less.
- Plate texture – smooth surfaces ensure maximum contact, which improves field saturation. Uneven metal weaken the grip.
- Thermal environment – heating the magnet causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.
Holding force was checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the lifting capacity.
Safe handling of NdFeB magnets
Sensitization to coating
It is widely known that nickel (the usual finish) is a potent allergen. For allergy sufferers, prevent direct skin contact and choose encased magnets.
Demagnetization risk
Do not overheat. NdFeB magnets are susceptible to heat. If you need operation above 80°C, ask us about HT versions (H, SH, UH).
Fragile material
Beware of splinters. Magnets can fracture upon violent connection, ejecting sharp fragments into the air. We recommend safety glasses.
Crushing risk
Big blocks can smash fingers instantly. Under no circumstances place your hand betwixt two strong magnets.
Pacemakers
Health Alert: Strong magnets can deactivate heart devices and defibrillators. Stay away if you have medical devices.
Choking Hazard
Absolutely store magnets away from children. Risk of swallowing is high, and the consequences of magnets connecting inside the body are very dangerous.
Safe distance
Data protection: Neodymium magnets can damage payment cards and sensitive devices (pacemakers, medical aids, timepieces).
Handling guide
Handle magnets with awareness. Their immense force can shock even experienced users. Be vigilant and do not underestimate their power.
Threat to navigation
GPS units and smartphones are highly susceptible to magnetic fields. Close proximity with a powerful NdFeB magnet can permanently damage the internal compass in your phone.
Fire risk
Combustion risk: Neodymium dust is explosive. Avoid machining magnets without safety gear as this risks ignition.
