MW 5x2 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010085
GTIN/EAN: 5906301810841
Diameter Ø
5 mm [±0,1 mm]
Height
2 mm [±0,1 mm]
Weight
0.29 g
Magnetization Direction
↑ axial
Load capacity
0.70 kg / 6.83 N
Magnetic Induction
386.50 mT / 3865 Gs
Coating
[NiCuNi] Nickel
0.1845 ZŁ with VAT / pcs + price for transport
0.1500 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical specification - MW 5x2 / N38 - cylindrical magnet
Specification / characteristics - MW 5x2 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010085 |
| GTIN/EAN | 5906301810841 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 5 mm [±0,1 mm] |
| Height | 2 mm [±0,1 mm] |
| Weight | 0.29 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.70 kg / 6.83 N |
| Magnetic Induction ~ ? | 386.50 mT / 3865 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 |
Technical modeling of the product - data
The following data represent the outcome of a physical simulation. Values were calculated on algorithms for the material Nd2Fe14B. Real-world conditions might slightly differ. Please consider these data as a reference point during assembly planning.
Table 1: Static force (pull vs distance) - characteristics
MW 5x2 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3860 Gs
386.0 mT
|
0.70 kg / 1.54 LBS
700.0 g / 6.9 N
|
low risk |
| 1 mm |
2460 Gs
246.0 mT
|
0.28 kg / 0.63 LBS
284.4 g / 2.8 N
|
low risk |
| 2 mm |
1384 Gs
138.4 mT
|
0.09 kg / 0.20 LBS
90.0 g / 0.9 N
|
low risk |
| 3 mm |
782 Gs
78.2 mT
|
0.03 kg / 0.06 LBS
28.8 g / 0.3 N
|
low risk |
| 5 mm |
293 Gs
29.3 mT
|
0.00 kg / 0.01 LBS
4.0 g / 0.0 N
|
low risk |
| 10 mm |
55 Gs
5.5 mT
|
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
|
low risk |
| 15 mm |
18 Gs
1.8 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
low risk |
| 20 mm |
8 Gs
0.8 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
low risk |
| 30 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
low risk |
| 50 mm |
1 Gs
0.1 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
low risk |
Table 2: Shear force (wall)
MW 5x2 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.14 kg / 0.31 LBS
140.0 g / 1.4 N
|
| 1 mm | Stal (~0.2) |
0.06 kg / 0.12 LBS
56.0 g / 0.5 N
|
| 2 mm | Stal (~0.2) |
0.02 kg / 0.04 LBS
18.0 g / 0.2 N
|
| 3 mm | Stal (~0.2) |
0.01 kg / 0.01 LBS
6.0 g / 0.1 N
|
| 5 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 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: Wall mounting (sliding) - behavior on slippery surfaces
MW 5x2 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.21 kg / 0.46 LBS
210.0 g / 2.1 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.14 kg / 0.31 LBS
140.0 g / 1.4 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.07 kg / 0.15 LBS
70.0 g / 0.7 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.35 kg / 0.77 LBS
350.0 g / 3.4 N
|
Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 5x2 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.07 kg / 0.15 LBS
70.0 g / 0.7 N
|
| 1 mm |
|
0.18 kg / 0.39 LBS
175.0 g / 1.7 N
|
| 2 mm |
|
0.35 kg / 0.77 LBS
350.0 g / 3.4 N
|
| 3 mm |
|
0.52 kg / 1.16 LBS
525.0 g / 5.2 N
|
| 5 mm |
|
0.70 kg / 1.54 LBS
700.0 g / 6.9 N
|
| 10 mm |
|
0.70 kg / 1.54 LBS
700.0 g / 6.9 N
|
| 11 mm |
|
0.70 kg / 1.54 LBS
700.0 g / 6.9 N
|
| 12 mm |
|
0.70 kg / 1.54 LBS
700.0 g / 6.9 N
|
Table 5: Working in heat (material behavior) - power drop
MW 5x2 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.70 kg / 1.54 LBS
700.0 g / 6.9 N
|
OK |
| 40 °C | -2.2% |
0.68 kg / 1.51 LBS
684.6 g / 6.7 N
|
OK |
| 60 °C | -4.4% |
0.67 kg / 1.48 LBS
669.2 g / 6.6 N
|
|
| 80 °C | -6.6% |
0.65 kg / 1.44 LBS
653.8 g / 6.4 N
|
|
| 100 °C | -28.8% |
0.50 kg / 1.10 LBS
498.4 g / 4.9 N
|
Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 5x2 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
1.80 kg / 3.98 LBS
5 236 Gs
|
0.27 kg / 0.60 LBS
271 g / 2.7 N
|
N/A |
| 1 mm |
1.21 kg / 2.68 LBS
6 336 Gs
|
0.18 kg / 0.40 LBS
182 g / 1.8 N
|
1.09 kg / 2.41 LBS
~0 Gs
|
| 2 mm |
0.73 kg / 1.62 LBS
4 921 Gs
|
0.11 kg / 0.24 LBS
110 g / 1.1 N
|
0.66 kg / 1.45 LBS
~0 Gs
|
| 3 mm |
0.42 kg / 0.92 LBS
3 711 Gs
|
0.06 kg / 0.14 LBS
62 g / 0.6 N
|
0.37 kg / 0.83 LBS
~0 Gs
|
| 5 mm |
0.13 kg / 0.29 LBS
2 071 Gs
|
0.02 kg / 0.04 LBS
19 g / 0.2 N
|
0.12 kg / 0.26 LBS
~0 Gs
|
| 10 mm |
0.01 kg / 0.02 LBS
587 Gs
|
0.00 kg / 0.00 LBS
2 g / 0.0 N
|
0.01 kg / 0.02 LBS
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 LBS
110 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 LBS
9 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
5 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
3 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
2 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
2 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
1 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Safety (HSE) (electronics) - warnings
MW 5x2 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 2.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 2.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 1.5 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) | 0.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 0.5 cm |
Table 8: Collisions (cracking risk) - collision effects
MW 5x2 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
49.55 km/h
(13.77 m/s)
|
0.03 J | |
| 30 mm |
85.82 km/h
(23.84 m/s)
|
0.08 J | |
| 50 mm |
110.79 km/h
(30.78 m/s)
|
0.14 J | |
| 100 mm |
156.69 km/h
(43.52 m/s)
|
0.27 J |
Table 9: Coating parameters (durability)
MW 5x2 / 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: Construction data (Pc)
MW 5x2 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 785 Mx | 7.9 µWb |
| Pc Coefficient | 0.50 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
MW 5x2 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.70 kg | Standard |
| Water (riverbed) |
0.80 kg
(+0.10 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Caution: On a vertical surface, the magnet retains just ~20% of its perpendicular strength.
2. Steel thickness impact
*Thin steel (e.g. computer case) severely limits the holding force.
3. Thermal stability
*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) = 0.50
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% |
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 neodymium magnets.
Pros
- They do not lose power, even after nearly ten years – the reduction in power is only ~1% (according to tests),
- They do not lose their magnetic properties even under strong external field,
- The use of an aesthetic coating of noble metals (nickel, gold, silver) causes the element to present itself better,
- They feature high magnetic induction at the operating surface, which increases their power,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
- Possibility of detailed creating as well as modifying to concrete applications,
- Significant place in high-tech industry – they are commonly used in hard drives, motor assemblies, diagnostic systems, also multitasking production systems.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Limitations
- They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
- When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- Due to limitations in realizing nuts and complicated forms in magnets, we propose using cover - magnetic mechanism.
- Potential hazard resulting from small fragments of magnets are risky, in case of ingestion, which is particularly important in the context of child health protection. Furthermore, small elements of these products are able to complicate diagnosis medical in case of swallowing.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which increases costs of application in large quantities
Holding force characteristics
Breakaway strength of the magnet in ideal conditions – what contributes to it?
- with the use of a sheet made of special test steel, guaranteeing full magnetic saturation
- whose transverse dimension reaches at least 10 mm
- characterized by lack of roughness
- under conditions of no distance (metal-to-metal)
- under perpendicular force vector (90-degree angle)
- in stable room temperature
Impact of factors on magnetic holding capacity in practice
- Distance (betwixt the magnet and the metal), since even a tiny clearance (e.g. 0.5 mm) results in a reduction in lifting capacity by up to 50% (this also applies to varnish, rust or debris).
- Direction of force – maximum parameter is available only during pulling at a 90° angle. The shear force of the magnet along the surface is usually several times smaller (approx. 1/5 of the lifting capacity).
- Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
- Material type – the best choice is pure iron steel. Stainless steels may attract less.
- Plate texture – ground elements guarantee perfect abutment, which increases force. Rough surfaces reduce efficiency.
- Thermal conditions – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).
Lifting capacity testing was conducted on a smooth plate of suitable thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate lowers the lifting capacity.
Warnings
Threat to electronics
Data protection: Neodymium magnets can damage payment cards and sensitive devices (pacemakers, hearing aids, mechanical watches).
Hand protection
Big blocks can break fingers in a fraction of a second. Under no circumstances put your hand betwixt two attracting surfaces.
Keep away from electronics
A powerful magnetic field negatively affects the functioning of magnetometers in phones and GPS navigation. Maintain magnets close to a device to avoid breaking the sensors.
Danger to pacemakers
Health Alert: Strong magnets can turn off pacemakers and defibrillators. Stay away if you have electronic implants.
Heat sensitivity
Keep cool. NdFeB magnets are sensitive to heat. If you need operation above 80°C, inquire about HT versions (H, SH, UH).
Handling rules
Before starting, read the rules. Sudden snapping can destroy the magnet or hurt your hand. Be predictive.
Nickel allergy
A percentage of the population have a contact allergy to Ni, which is the standard coating for NdFeB magnets. Extended handling can result in skin redness. We strongly advise wear safety gloves.
This is not a toy
Neodymium magnets are not toys. Swallowing several magnets may result in them attracting across intestines, which constitutes a severe health hazard and requires urgent medical intervention.
Protective goggles
Protect your eyes. Magnets can explode upon uncontrolled impact, launching shards into the air. Eye protection is mandatory.
Flammability
Combustion risk: Rare earth powder is explosive. Avoid machining magnets without safety gear as this risks ignition.
