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
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Technical details - 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 |
Engineering analysis of the product - technical parameters
The following data are the outcome of a mathematical calculation. Results rely on algorithms for the class Nd2Fe14B. Real-world performance may deviate from the simulation results. Use these calculations as a reference point when designing systems.
Table 1: Static force (pull vs distance) - power drop
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 pounds
700.0 g / 6.9 N
|
safe |
| 1 mm |
2460 Gs
246.0 mT
|
0.28 kg / 0.63 pounds
284.4 g / 2.8 N
|
safe |
| 2 mm |
1384 Gs
138.4 mT
|
0.09 kg / 0.20 pounds
90.0 g / 0.9 N
|
safe |
| 3 mm |
782 Gs
78.2 mT
|
0.03 kg / 0.06 pounds
28.8 g / 0.3 N
|
safe |
| 5 mm |
293 Gs
29.3 mT
|
0.00 kg / 0.01 pounds
4.0 g / 0.0 N
|
safe |
| 10 mm |
55 Gs
5.5 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
safe |
| 15 mm |
18 Gs
1.8 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
| 20 mm |
8 Gs
0.8 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
| 30 mm |
3 Gs
0.3 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 force (vertical surface)
MW 5x2 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.14 kg / 0.31 pounds
140.0 g / 1.4 N
|
| 1 mm | Stal (~0.2) |
0.06 kg / 0.12 pounds
56.0 g / 0.5 N
|
| 2 mm | Stal (~0.2) |
0.02 kg / 0.04 pounds
18.0 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
0.0 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 (shearing) - vertical pull
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 pounds
210.0 g / 2.1 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.14 kg / 0.31 pounds
140.0 g / 1.4 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.07 kg / 0.15 pounds
70.0 g / 0.7 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.35 kg / 0.77 pounds
350.0 g / 3.4 N
|
Table 4: Steel thickness (saturation) - power losses
MW 5x2 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.07 kg / 0.15 pounds
70.0 g / 0.7 N
|
| 1 mm |
|
0.18 kg / 0.39 pounds
175.0 g / 1.7 N
|
| 2 mm |
|
0.35 kg / 0.77 pounds
350.0 g / 3.4 N
|
| 3 mm |
|
0.52 kg / 1.16 pounds
525.0 g / 5.2 N
|
| 5 mm |
|
0.70 kg / 1.54 pounds
700.0 g / 6.9 N
|
| 10 mm |
|
0.70 kg / 1.54 pounds
700.0 g / 6.9 N
|
| 11 mm |
|
0.70 kg / 1.54 pounds
700.0 g / 6.9 N
|
| 12 mm |
|
0.70 kg / 1.54 pounds
700.0 g / 6.9 N
|
Table 5: Working in heat (material behavior) - thermal limit
MW 5x2 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.70 kg / 1.54 pounds
700.0 g / 6.9 N
|
OK |
| 40 °C | -2.2% |
0.68 kg / 1.51 pounds
684.6 g / 6.7 N
|
OK |
| 60 °C | -4.4% |
0.67 kg / 1.48 pounds
669.2 g / 6.6 N
|
|
| 80 °C | -6.6% |
0.65 kg / 1.44 pounds
653.8 g / 6.4 N
|
|
| 100 °C | -28.8% |
0.50 kg / 1.10 pounds
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) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
1.80 kg / 3.98 pounds
5 236 Gs
|
0.27 kg / 0.60 pounds
271 g / 2.7 N
|
N/A |
| 1 mm |
1.21 kg / 2.68 pounds
6 336 Gs
|
0.18 kg / 0.40 pounds
182 g / 1.8 N
|
1.09 kg / 2.41 pounds
~0 Gs
|
| 2 mm |
0.73 kg / 1.62 pounds
4 921 Gs
|
0.11 kg / 0.24 pounds
110 g / 1.1 N
|
0.66 kg / 1.45 pounds
~0 Gs
|
| 3 mm |
0.42 kg / 0.92 pounds
3 711 Gs
|
0.06 kg / 0.14 pounds
62 g / 0.6 N
|
0.37 kg / 0.83 pounds
~0 Gs
|
| 5 mm |
0.13 kg / 0.29 pounds
2 071 Gs
|
0.02 kg / 0.04 pounds
19 g / 0.2 N
|
0.12 kg / 0.26 pounds
~0 Gs
|
| 10 mm |
0.01 kg / 0.02 pounds
587 Gs
|
0.00 kg / 0.00 pounds
2 g / 0.0 N
|
0.01 kg / 0.02 pounds
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 pounds
110 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
9 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
5 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
3 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
2 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
2 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
1 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Protective zones (implants) - 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 |
| 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) | 0.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 0.5 cm |
Table 8: Collisions (kinetic energy) - warning
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: Anti-corrosion coating 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: Hydrostatics and buoyancy
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. Wall mount (shear)
*Warning: On a vertical wall, the magnet retains only ~20% of its nominal pull.
2. Steel saturation
*Thin metal sheet (e.g. 0.5mm PC case) significantly limits the holding force.
3. Heat tolerance
*For N38 grade, 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.
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 |
Check out also proposals
Strengths as well as weaknesses of Nd2Fe14B magnets.
Advantages
- Their strength is durable, and after around 10 years it decreases only by ~1% (theoretically),
- Neodymium magnets remain remarkably resistant to magnetic field loss caused by external magnetic fields,
- In other words, due to the reflective layer of silver, the element gains visual value,
- Magnets are distinguished by maximum magnetic induction on the outer side,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Possibility of detailed machining as well as optimizing to specific requirements,
- Key role in advanced technology sectors – they are used in computer drives, motor assemblies, medical equipment, also industrial machines.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Weaknesses
- At very strong impacts they can crack, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
- We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
- Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Due to limitations in creating threads and complicated forms in magnets, we propose using cover - magnetic mechanism.
- Possible danger related to microscopic parts of magnets pose a threat, if swallowed, which becomes key in the context of child safety. Furthermore, tiny parts of these devices can disrupt the diagnostic process medical after entering the body.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities
Pull force analysis
Optimal lifting capacity of a neodymium magnet – what affects it?
- using a sheet made of mild steel, serving as a magnetic yoke
- whose transverse dimension is min. 10 mm
- characterized by lack of roughness
- under conditions of ideal adhesion (metal-to-metal)
- under axial force direction (90-degree angle)
- at temperature room level
Lifting capacity in practice – influencing factors
- Gap between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by veneer or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
- Load vector – maximum parameter is obtained only during pulling at a 90° angle. The force required to slide of the magnet along the surface is typically several times lower (approx. 1/5 of the lifting capacity).
- Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
- Steel grade – ideal substrate is pure iron steel. Stainless steels may generate lower lifting capacity.
- Smoothness – ideal contact is possible only on smooth steel. Any scratches and bumps create air cushions, weakening the magnet.
- Thermal factor – high temperature weakens magnetic field. Too high temperature can permanently demagnetize the magnet.
Lifting capacity testing was carried out on a smooth plate of suitable thickness, under perpendicular forces, however under parallel forces the holding force is lower. Additionally, even a slight gap between the magnet and the plate lowers the lifting capacity.
H&S for magnets
Flammability
Combustion risk: Neodymium dust is highly flammable. Avoid machining magnets in home conditions as this may cause fire.
Safe operation
Use magnets consciously. Their powerful strength can shock even professionals. Be vigilant and respect their power.
This is not a toy
Always keep magnets out of reach of children. Risk of swallowing is high, and the consequences of magnets connecting inside the body are fatal.
Protect data
Data protection: Strong magnets can ruin payment cards and delicate electronics (heart implants, medical aids, mechanical watches).
Magnets are brittle
Despite the nickel coating, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.
Warning for allergy sufferers
Some people experience a sensitization to nickel, which is the typical protective layer for neodymium magnets. Frequent touching may cause a rash. It is best to wear protective gloves.
Impact on smartphones
Note: neodymium magnets generate a field that interferes with sensitive sensors. Maintain a safe distance from your mobile, device, and GPS.
Medical implants
Patients with a heart stimulator should maintain an safe separation from magnets. The magnetism can disrupt the functioning of the life-saving device.
Power loss in heat
Do not overheat. NdFeB magnets are susceptible to temperature. If you need operation above 80°C, look for special high-temperature series (H, SH, UH).
Bodily injuries
Watch your fingers. Two large magnets will join immediately with a force of massive weight, destroying anything in their path. Exercise extreme caution!
