MW 4x6 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010078
GTIN/EAN: 5906301810773
Diameter Ø
4 mm [±0,1 mm]
Height
6 mm [±0,1 mm]
Weight
0.57 g
Magnetization Direction
↑ axial
Load capacity
0.41 kg / 4.06 N
Magnetic Induction
586.32 mT / 5863 Gs
Coating
[NiCuNi] Nickel
0.381 ZŁ with VAT / pcs + price for transport
0.310 ZŁ net + 23% VAT / pcs
bulk discounts:
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Detailed specification - MW 4x6 / N38 - cylindrical magnet
Specification / characteristics - MW 4x6 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010078 |
| GTIN/EAN | 5906301810773 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 4 mm [±0,1 mm] |
| Height | 6 mm [±0,1 mm] |
| Weight | 0.57 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.41 kg / 4.06 N |
| Magnetic Induction ~ ? | 586.32 mT / 5863 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 modeling of the product - report
Presented data are the direct effect of a engineering analysis. Values were calculated on models for the material Nd2Fe14B. Real-world performance might slightly deviate from the simulation results. Treat these calculations as a reference point during assembly planning.
Table 1: Static pull force (pull vs distance) - characteristics
MW 4x6 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
5852 Gs
585.2 mT
|
0.41 kg / 0.90 LBS
410.0 g / 4.0 N
|
safe |
| 1 mm |
3189 Gs
318.9 mT
|
0.12 kg / 0.27 LBS
121.7 g / 1.2 N
|
safe |
| 2 mm |
1631 Gs
163.1 mT
|
0.03 kg / 0.07 LBS
31.8 g / 0.3 N
|
safe |
| 3 mm |
894 Gs
89.4 mT
|
0.01 kg / 0.02 LBS
9.6 g / 0.1 N
|
safe |
| 5 mm |
343 Gs
34.3 mT
|
0.00 kg / 0.00 LBS
1.4 g / 0.0 N
|
safe |
| 10 mm |
73 Gs
7.3 mT
|
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
|
safe |
| 15 mm |
26 Gs
2.6 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
| 20 mm |
13 Gs
1.3 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
| 30 mm |
4 Gs
0.4 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: Vertical hold (wall)
MW 4x6 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.08 kg / 0.18 LBS
82.0 g / 0.8 N
|
| 1 mm | Stal (~0.2) |
0.02 kg / 0.05 LBS
24.0 g / 0.2 N
|
| 2 mm | Stal (~0.2) |
0.01 kg / 0.01 LBS
6.0 g / 0.1 N
|
| 3 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
2.0 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 (shearing) - vertical pull
MW 4x6 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.12 kg / 0.27 LBS
123.0 g / 1.2 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.08 kg / 0.18 LBS
82.0 g / 0.8 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.04 kg / 0.09 LBS
41.0 g / 0.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.21 kg / 0.45 LBS
205.0 g / 2.0 N
|
Table 4: Steel thickness (saturation) - sheet metal selection
MW 4x6 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.04 kg / 0.09 LBS
41.0 g / 0.4 N
|
| 1 mm |
|
0.10 kg / 0.23 LBS
102.5 g / 1.0 N
|
| 2 mm |
|
0.21 kg / 0.45 LBS
205.0 g / 2.0 N
|
| 3 mm |
|
0.31 kg / 0.68 LBS
307.5 g / 3.0 N
|
| 5 mm |
|
0.41 kg / 0.90 LBS
410.0 g / 4.0 N
|
| 10 mm |
|
0.41 kg / 0.90 LBS
410.0 g / 4.0 N
|
| 11 mm |
|
0.41 kg / 0.90 LBS
410.0 g / 4.0 N
|
| 12 mm |
|
0.41 kg / 0.90 LBS
410.0 g / 4.0 N
|
Table 5: Thermal stability (stability) - thermal limit
MW 4x6 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.41 kg / 0.90 LBS
410.0 g / 4.0 N
|
OK |
| 40 °C | -2.2% |
0.40 kg / 0.88 LBS
401.0 g / 3.9 N
|
OK |
| 60 °C | -4.4% |
0.39 kg / 0.86 LBS
392.0 g / 3.8 N
|
OK |
| 80 °C | -6.6% |
0.38 kg / 0.84 LBS
382.9 g / 3.8 N
|
|
| 100 °C | -28.8% |
0.29 kg / 0.64 LBS
291.9 g / 2.9 N
|
Table 6: Two magnets (repulsion) - field range
MW 4x6 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
2.65 kg / 5.85 LBS
6 085 Gs
|
0.40 kg / 0.88 LBS
398 g / 3.9 N
|
N/A |
| 1 mm |
1.51 kg / 3.34 LBS
8 844 Gs
|
0.23 kg / 0.50 LBS
227 g / 2.2 N
|
1.36 kg / 3.01 LBS
~0 Gs
|
| 2 mm |
0.79 kg / 1.74 LBS
6 377 Gs
|
0.12 kg / 0.26 LBS
118 g / 1.2 N
|
0.71 kg / 1.56 LBS
~0 Gs
|
| 3 mm |
0.40 kg / 0.88 LBS
4 541 Gs
|
0.06 kg / 0.13 LBS
60 g / 0.6 N
|
0.36 kg / 0.79 LBS
~0 Gs
|
| 5 mm |
0.11 kg / 0.24 LBS
2 388 Gs
|
0.02 kg / 0.04 LBS
17 g / 0.2 N
|
0.10 kg / 0.22 LBS
~0 Gs
|
| 10 mm |
0.01 kg / 0.02 LBS
687 Gs
|
0.00 kg / 0.00 LBS
1 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 LBS
145 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
14 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
8 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
5 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
4 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
3 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
2 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Safety (HSE) (implants) - warnings
MW 4x6 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 3.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 2.5 cm |
| Timepiece | 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) | 0.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 0.5 cm |
Table 8: Collisions (kinetic energy) - collision effects
MW 4x6 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
27.05 km/h
(7.51 m/s)
|
0.02 J | |
| 30 mm |
46.85 km/h
(13.01 m/s)
|
0.05 J | |
| 50 mm |
60.48 km/h
(16.80 m/s)
|
0.08 J | |
| 100 mm |
85.53 km/h
(23.76 m/s)
|
0.16 J |
Table 9: Corrosion resistance
MW 4x6 / 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 (Pc)
MW 4x6 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 792 Mx | 7.9 µWb |
| Pc Coefficient | 1.09 | High (Stable) |
Table 11: Hydrostatics and buoyancy
MW 4x6 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.41 kg | Standard |
| Water (riverbed) |
0.47 kg
(+0.06 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Caution: On a vertical surface, the magnet holds just ~20% of its nominal pull.
2. Efficiency vs thickness
*Thin steel (e.g. 0.5mm PC case) significantly reduces the holding force.
3. Temperature resistance
*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) = 1.09
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other offers
Pros as well as cons of Nd2Fe14B magnets.
Benefits
- They do not lose strength, even over nearly 10 years – the reduction in power is only ~1% (based on measurements),
- They are resistant to demagnetization induced by external disturbances,
- Thanks to the metallic finish, the coating of Ni-Cu-Ni, gold-plated, or silver-plated gives an clean appearance,
- Magnets are distinguished by maximum magnetic induction on the active area,
- Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for functioning at temperatures reaching 230°C and above...
- Thanks to modularity in constructing and the ability to adapt to specific needs,
- Universal use in future technologies – they are used in HDD drives, electric drive systems, diagnostic systems, also industrial machines.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Disadvantages
- Brittleness is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a steel housing, which not only secures them against impacts but also increases their 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
- Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
- Limited ability of making nuts in the magnet and complex shapes - recommended is a housing - magnetic holder.
- Potential hazard resulting from small fragments of magnets can be dangerous, in case of ingestion, which gains importance in the context of child safety. It is also worth noting that small elements of these magnets are able to be problematic in diagnostics medical after entering the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Lifting parameters
Highest magnetic holding force – what affects it?
- using a base made of mild steel, serving as a magnetic yoke
- whose thickness reaches at least 10 mm
- with an ideally smooth contact surface
- under conditions of gap-free contact (surface-to-surface)
- during pulling in a direction perpendicular to the mounting surface
- at conditions approx. 20°C
Magnet lifting force in use – key factors
- Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
- Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
- Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
- Metal type – different alloys reacts the same. Alloy additives weaken the attraction effect.
- Surface structure – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Roughness creates an air distance.
- Heat – neodymium magnets have a negative temperature coefficient. When it is hot they are weaker, and in frost they can be stronger (up to a certain limit).
Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas under parallel forces the holding force is lower. In addition, even a minimal clearance between the magnet and the plate lowers the load capacity.
Warnings
Protect data
Intense magnetic fields can destroy records on payment cards, HDDs, and other magnetic media. Keep a distance of min. 10 cm.
Material brittleness
NdFeB magnets are sintered ceramics, which means they are prone to chipping. Impact of two magnets leads to them shattering into small pieces.
Swallowing risk
Adult use only. Small elements can be swallowed, causing intestinal necrosis. Keep away from kids and pets.
Power loss in heat
Avoid heat. Neodymium magnets are sensitive to heat. If you require operation above 80°C, look for HT versions (H, SH, UH).
Impact on smartphones
Navigation devices and smartphones are extremely sensitive to magnetic fields. Direct contact with a strong magnet can decalibrate the sensors in your phone.
Bone fractures
Big blocks can crush fingers in a fraction of a second. Under no circumstances put your hand between two strong magnets.
Machining danger
Powder generated during machining of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.
Caution required
Handle magnets with awareness. Their huge power can shock even experienced users. Stay alert and respect their force.
Danger to pacemakers
Medical warning: Neodymium magnets can turn off heart devices and defibrillators. Do not approach if you have medical devices.
Sensitization to coating
Allergy Notice: The nickel-copper-nickel coating contains nickel. If skin irritation occurs, cease handling magnets and wear gloves.
