MW 3x6 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010065
GTIN/EAN: 5906301810643
Diameter Ø
3 mm [±0,1 mm]
Height
6 mm [±0,1 mm]
Weight
0.32 g
Magnetization Direction
↑ axial
Load capacity
0.20 kg / 1.95 N
Magnetic Induction
598.96 mT / 5990 Gs
Coating
[NiCuNi] Nickel
0.295 ZŁ with VAT / pcs + price for transport
0.240 ZŁ net + 23% VAT / pcs
bulk discounts:
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Product card - MW 3x6 / N38 - cylindrical magnet
Specification / characteristics - MW 3x6 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010065 |
| GTIN/EAN | 5906301810643 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 3 mm [±0,1 mm] |
| Height | 6 mm [±0,1 mm] |
| Weight | 0.32 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.20 kg / 1.95 N |
| Magnetic Induction ~ ? | 598.96 mT / 5990 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 |
Physical modeling of the magnet - technical parameters
These information constitute the outcome of a physical calculation. Results were calculated on models for the material Nd2Fe14B. Actual performance might slightly differ. Please consider these data as a supplementary guide during assembly planning.
Table 1: Static pull force (force vs gap) - characteristics
MW 3x6 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
5974 Gs
597.4 mT
|
0.20 kg / 0.44 LBS
200.0 g / 2.0 N
|
safe |
| 1 mm |
2623 Gs
262.3 mT
|
0.04 kg / 0.09 LBS
38.6 g / 0.4 N
|
safe |
| 2 mm |
1134 Gs
113.4 mT
|
0.01 kg / 0.02 LBS
7.2 g / 0.1 N
|
safe |
| 3 mm |
570 Gs
57.0 mT
|
0.00 kg / 0.00 LBS
1.8 g / 0.0 N
|
safe |
| 5 mm |
205 Gs
20.5 mT
|
0.00 kg / 0.00 LBS
0.2 g / 0.0 N
|
safe |
| 10 mm |
42 Gs
4.2 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
| 15 mm |
15 Gs
1.5 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
| 20 mm |
7 Gs
0.7 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
| 30 mm |
2 Gs
0.2 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
| 50 mm |
1 Gs
0.1 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
Table 2: Slippage hold (wall)
MW 3x6 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.04 kg / 0.09 LBS
40.0 g / 0.4 N
|
| 1 mm | Stal (~0.2) |
0.01 kg / 0.02 LBS
8.0 g / 0.1 N
|
| 2 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
2.0 g / 0.0 N
|
| 3 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 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 3x6 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.06 kg / 0.13 LBS
60.0 g / 0.6 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.04 kg / 0.09 LBS
40.0 g / 0.4 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.02 kg / 0.04 LBS
20.0 g / 0.2 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.10 kg / 0.22 LBS
100.0 g / 1.0 N
|
Table 4: Material efficiency (saturation) - sheet metal selection
MW 3x6 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.02 kg / 0.04 LBS
20.0 g / 0.2 N
|
| 1 mm |
|
0.05 kg / 0.11 LBS
50.0 g / 0.5 N
|
| 2 mm |
|
0.10 kg / 0.22 LBS
100.0 g / 1.0 N
|
| 3 mm |
|
0.15 kg / 0.33 LBS
150.0 g / 1.5 N
|
| 5 mm |
|
0.20 kg / 0.44 LBS
200.0 g / 2.0 N
|
| 10 mm |
|
0.20 kg / 0.44 LBS
200.0 g / 2.0 N
|
| 11 mm |
|
0.20 kg / 0.44 LBS
200.0 g / 2.0 N
|
| 12 mm |
|
0.20 kg / 0.44 LBS
200.0 g / 2.0 N
|
Table 5: Thermal stability (material behavior) - thermal limit
MW 3x6 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.20 kg / 0.44 LBS
200.0 g / 2.0 N
|
OK |
| 40 °C | -2.2% |
0.20 kg / 0.43 LBS
195.6 g / 1.9 N
|
OK |
| 60 °C | -4.4% |
0.19 kg / 0.42 LBS
191.2 g / 1.9 N
|
OK |
| 80 °C | -6.6% |
0.19 kg / 0.41 LBS
186.8 g / 1.8 N
|
|
| 100 °C | -28.8% |
0.14 kg / 0.31 LBS
142.4 g / 1.4 N
|
Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 3x6 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
1.56 kg / 3.43 LBS
6 111 Gs
|
0.23 kg / 0.51 LBS
233 g / 2.3 N
|
N/A |
| 1 mm |
0.73 kg / 1.60 LBS
8 161 Gs
|
0.11 kg / 0.24 LBS
109 g / 1.1 N
|
0.65 kg / 1.44 LBS
~0 Gs
|
| 2 mm |
0.30 kg / 0.66 LBS
5 246 Gs
|
0.04 kg / 0.10 LBS
45 g / 0.4 N
|
0.27 kg / 0.60 LBS
~0 Gs
|
| 3 mm |
0.13 kg / 0.28 LBS
3 391 Gs
|
0.02 kg / 0.04 LBS
19 g / 0.2 N
|
0.11 kg / 0.25 LBS
~0 Gs
|
| 5 mm |
0.03 kg / 0.06 LBS
1 578 Gs
|
0.00 kg / 0.01 LBS
4 g / 0.0 N
|
0.02 kg / 0.05 LBS
~0 Gs
|
| 10 mm |
0.00 kg / 0.00 LBS
409 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 LBS
83 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
8 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: Protective zones (electronics) - warnings
MW 3x6 / 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 |
| Mechanical watch | 20 Gs (2.0 mT) | 1.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 1.5 cm |
| Remote | 50 Gs (5.0 mT) | 1.0 cm |
| Payment card | 400 Gs (40.0 mT) | 0.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 0.5 cm |
Table 8: Impact energy (kinetic energy) - collision effects
MW 3x6 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
25.21 km/h
(7.00 m/s)
|
0.01 J | |
| 30 mm |
43.67 km/h
(12.13 m/s)
|
0.02 J | |
| 50 mm |
56.38 km/h
(15.66 m/s)
|
0.04 J | |
| 100 mm |
79.73 km/h
(22.15 m/s)
|
0.08 J |
Table 9: Surface protection spec
MW 3x6 / 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 3x6 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 470 Mx | 4.7 µWb |
| Pc Coefficient | 1.21 | High (Stable) |
Table 11: Hydrostatics and buoyancy
MW 3x6 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.20 kg | Standard |
| Water (riverbed) |
0.23 kg
(+0.03 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Warning: On a vertical surface, the magnet retains just approx. 20-30% of its nominal pull.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) drastically limits the holding force.
3. Power loss vs temp
*For N38 grade, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.21
This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. 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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
See also offers
Pros as well as cons of rare earth magnets.
Strengths
- They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (according to literature),
- They maintain their magnetic properties even under external field action,
- The use of an elegant layer of noble metals (nickel, gold, silver) causes the element to present itself better,
- The surface of neodymium magnets generates a powerful magnetic field – this is a key feature,
- Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures approaching 230°C and above...
- Thanks to modularity in designing and the capacity to modify to unusual requirements,
- Versatile presence in high-tech industry – they find application in computer drives, motor assemblies, medical equipment, and complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which enables their usage in compact constructions
Cons
- At very strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
- Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
- They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- Limited possibility of creating threads in the magnet and complex forms - preferred is a housing - magnet mounting.
- Potential hazard to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that small elements of these devices are able to complicate diagnosis medical in case of swallowing.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Lifting parameters
Maximum lifting capacity of the magnet – what affects it?
- on a block made of mild steel, perfectly concentrating the magnetic flux
- possessing a thickness of minimum 10 mm to avoid saturation
- characterized by even structure
- under conditions of ideal adhesion (metal-to-metal)
- under vertical application of breakaway force (90-degree angle)
- at room temperature
What influences lifting capacity in practice
- Distance (between the magnet and the metal), because even a microscopic clearance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to paint, rust or dirt).
- Force direction – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet holds significantly lower power (often approx. 20-30% of maximum force).
- Base massiveness – insufficiently thick steel does not close the flux, causing part of the power to be escaped into the air.
- Metal type – different alloys reacts the same. Alloy additives weaken the interaction with the magnet.
- Smoothness – full contact is possible only on smooth steel. Rough texture create air cushions, reducing force.
- Heat – NdFeB sinters have a sensitivity to temperature. When it is hot they lose power, and in frost gain strength (up to a certain limit).
Lifting capacity was measured using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular pulling force, whereas under parallel forces the holding force is lower. Moreover, even a small distance between the magnet and the plate reduces the load capacity.
H&S for magnets
Powerful field
Use magnets consciously. Their powerful strength can surprise even experienced users. Plan your moves and do not underestimate their power.
Do not give to children
Only for adults. Small elements can be swallowed, causing intestinal necrosis. Keep away from kids and pets.
Compass and GPS
A powerful magnetic field disrupts the functioning of magnetometers in phones and GPS navigation. Keep magnets near a device to avoid breaking the sensors.
Mechanical processing
Dust generated during grinding of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.
Serious injuries
Mind your fingers. Two large magnets will snap together instantly with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!
Fragile material
Despite the nickel coating, neodymium is brittle and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.
Operating temperature
Monitor thermal conditions. Heating the magnet to high heat will destroy its properties and pulling force.
Safe distance
Equipment safety: Neodymium magnets can ruin payment cards and delicate electronics (pacemakers, hearing aids, timepieces).
Allergic reactions
It is widely known that the nickel plating (the usual finish) is a strong allergen. For allergy sufferers, avoid direct skin contact or choose coated magnets.
Danger to pacemakers
For implant holders: Powerful magnets disrupt medical devices. Maintain at least 30 cm distance or ask another person to handle the magnets.
