MW 12x6 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010021
GTIN/EAN: 5906301810209
Diameter Ø
12 mm [±0,1 mm]
Height
6 mm [±0,1 mm]
Weight
5.09 g
Magnetization Direction
↑ axial
Load capacity
4.60 kg / 45.09 N
Magnetic Induction
437.99 mT / 4380 Gs
Coating
[NiCuNi] Nickel
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Technical - MW 12x6 / N38 - cylindrical magnet
Specification / characteristics - MW 12x6 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010021 |
| GTIN/EAN | 5906301810209 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 12 mm [±0,1 mm] |
| Height | 6 mm [±0,1 mm] |
| Weight | 5.09 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 4.60 kg / 45.09 N |
| Magnetic Induction ~ ? | 437.99 mT / 4380 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 analysis of the product - data
These information are the result of a physical analysis. Results were calculated on algorithms for the material Nd2Fe14B. Actual conditions may differ from theoretical values. Treat these data as a preliminary roadmap when designing systems.
Table 1: Static force (pull vs gap) - power drop
MW 12x6 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4377 Gs
437.7 mT
|
4.60 kg / 10.14 LBS
4600.0 g / 45.1 N
|
strong |
| 1 mm |
3688 Gs
368.8 mT
|
3.27 kg / 7.20 LBS
3265.4 g / 32.0 N
|
strong |
| 2 mm |
2999 Gs
299.9 mT
|
2.16 kg / 4.76 LBS
2159.7 g / 21.2 N
|
strong |
| 3 mm |
2386 Gs
238.6 mT
|
1.37 kg / 3.01 LBS
1366.7 g / 13.4 N
|
safe |
| 5 mm |
1474 Gs
147.4 mT
|
0.52 kg / 1.15 LBS
521.4 g / 5.1 N
|
safe |
| 10 mm |
489 Gs
48.9 mT
|
0.06 kg / 0.13 LBS
57.4 g / 0.6 N
|
safe |
| 15 mm |
205 Gs
20.5 mT
|
0.01 kg / 0.02 LBS
10.1 g / 0.1 N
|
safe |
| 20 mm |
103 Gs
10.3 mT
|
0.00 kg / 0.01 LBS
2.5 g / 0.0 N
|
safe |
| 30 mm |
36 Gs
3.6 mT
|
0.00 kg / 0.00 LBS
0.3 g / 0.0 N
|
safe |
| 50 mm |
9 Gs
0.9 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
Table 2: Shear force (wall)
MW 12x6 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.92 kg / 2.03 LBS
920.0 g / 9.0 N
|
| 1 mm | Stal (~0.2) |
0.65 kg / 1.44 LBS
654.0 g / 6.4 N
|
| 2 mm | Stal (~0.2) |
0.43 kg / 0.95 LBS
432.0 g / 4.2 N
|
| 3 mm | Stal (~0.2) |
0.27 kg / 0.60 LBS
274.0 g / 2.7 N
|
| 5 mm | Stal (~0.2) |
0.10 kg / 0.23 LBS
104.0 g / 1.0 N
|
| 10 mm | Stal (~0.2) |
0.01 kg / 0.03 LBS
12.0 g / 0.1 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
2.0 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: Vertical assembly (sliding) - behavior on slippery surfaces
MW 12x6 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
1.38 kg / 3.04 LBS
1380.0 g / 13.5 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.92 kg / 2.03 LBS
920.0 g / 9.0 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.46 kg / 1.01 LBS
460.0 g / 4.5 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
2.30 kg / 5.07 LBS
2300.0 g / 22.6 N
|
Table 4: Material efficiency (saturation) - power losses
MW 12x6 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.46 kg / 1.01 LBS
460.0 g / 4.5 N
|
| 1 mm |
|
1.15 kg / 2.54 LBS
1150.0 g / 11.3 N
|
| 2 mm |
|
2.30 kg / 5.07 LBS
2300.0 g / 22.6 N
|
| 3 mm |
|
3.45 kg / 7.61 LBS
3450.0 g / 33.8 N
|
| 5 mm |
|
4.60 kg / 10.14 LBS
4600.0 g / 45.1 N
|
| 10 mm |
|
4.60 kg / 10.14 LBS
4600.0 g / 45.1 N
|
| 11 mm |
|
4.60 kg / 10.14 LBS
4600.0 g / 45.1 N
|
| 12 mm |
|
4.60 kg / 10.14 LBS
4600.0 g / 45.1 N
|
Table 5: Working in heat (stability) - power drop
MW 12x6 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
4.60 kg / 10.14 LBS
4600.0 g / 45.1 N
|
OK |
| 40 °C | -2.2% |
4.50 kg / 9.92 LBS
4498.8 g / 44.1 N
|
OK |
| 60 °C | -4.4% |
4.40 kg / 9.70 LBS
4397.6 g / 43.1 N
|
|
| 80 °C | -6.6% |
4.30 kg / 9.47 LBS
4296.4 g / 42.1 N
|
|
| 100 °C | -28.8% |
3.28 kg / 7.22 LBS
3275.2 g / 32.1 N
|
Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 12x6 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
13.36 kg / 29.45 LBS
5 536 Gs
|
2.00 kg / 4.42 LBS
2004 g / 19.7 N
|
N/A |
| 1 mm |
11.39 kg / 25.10 LBS
8 082 Gs
|
1.71 kg / 3.77 LBS
1708 g / 16.8 N
|
10.25 kg / 22.59 LBS
~0 Gs
|
| 2 mm |
9.48 kg / 20.91 LBS
7 376 Gs
|
1.42 kg / 3.14 LBS
1423 g / 14.0 N
|
8.54 kg / 18.82 LBS
~0 Gs
|
| 3 mm |
7.77 kg / 17.12 LBS
6 675 Gs
|
1.17 kg / 2.57 LBS
1165 g / 11.4 N
|
6.99 kg / 15.41 LBS
~0 Gs
|
| 5 mm |
5.01 kg / 11.05 LBS
5 361 Gs
|
0.75 kg / 1.66 LBS
752 g / 7.4 N
|
4.51 kg / 9.94 LBS
~0 Gs
|
| 10 mm |
1.51 kg / 3.34 LBS
2 948 Gs
|
0.23 kg / 0.50 LBS
227 g / 2.2 N
|
1.36 kg / 3.01 LBS
~0 Gs
|
| 20 mm |
0.17 kg / 0.37 LBS
978 Gs
|
0.02 kg / 0.06 LBS
25 g / 0.2 N
|
0.15 kg / 0.33 LBS
~0 Gs
|
| 50 mm |
0.00 kg / 0.01 LBS
116 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
72 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
48 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
33 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
24 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
18 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Hazards (electronics) - precautionary measures
MW 12x6 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 6.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 5.0 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 4.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 3.0 cm |
| Car key | 50 Gs (5.0 mT) | 3.0 cm |
| Payment card | 400 Gs (40.0 mT) | 1.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Dynamics (kinetic energy) - warning
MW 12x6 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
30.55 km/h
(8.49 m/s)
|
0.18 J | |
| 30 mm |
52.51 km/h
(14.59 m/s)
|
0.54 J | |
| 50 mm |
67.79 km/h
(18.83 m/s)
|
0.90 J | |
| 100 mm |
95.87 km/h
(26.63 m/s)
|
1.81 J |
Table 9: Anti-corrosion coating durability
MW 12x6 / 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 12x6 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 5 024 Mx | 50.2 µWb |
| Pc Coefficient | 0.59 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MW 12x6 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 4.60 kg | Standard |
| Water (riverbed) |
5.27 kg
(+0.67 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Note: On a vertical surface, the magnet holds merely a fraction of its max power.
2. Steel saturation
*Thin steel (e.g. computer case) drastically weakens the holding force.
3. Power loss vs temp
*For standard magnets, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.59
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other products
Advantages as well as disadvantages of neodymium magnets.
Pros
- Their magnetic field remains stable, and after approximately 10 years it decreases only by ~1% (according to research),
- They do not lose their magnetic properties even under strong external field,
- In other words, due to the metallic finish of silver, the element looks attractive,
- Neodymium magnets ensure maximum magnetic induction on a contact point, which ensures high operational effectiveness,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
- Thanks to versatility in constructing and the ability to customize to individual projects,
- Huge importance in high-tech industry – they serve a role in mass storage devices, brushless drives, advanced medical instruments, also industrial machines.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Weaknesses
- Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a special holder, which not only protects them against impacts but also increases their durability
- When exposed to high temperature, neodymium magnets suffer 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
- When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation and corrosion.
- We suggest a housing - magnetic mechanism, due to difficulties in producing threads inside the magnet and complicated forms.
- Health risk related to microscopic parts of magnets pose a threat, if swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small components of these devices can be problematic in diagnostics medical in case of swallowing.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Pull force analysis
Maximum lifting capacity of the magnet – what it depends on?
- with the use of a sheet made of low-carbon steel, ensuring full magnetic saturation
- possessing a thickness of minimum 10 mm to ensure full flux closure
- with an polished contact surface
- without the slightest insulating layer between the magnet and steel
- during pulling in a direction vertical to the plane
- at temperature room level
Key elements affecting lifting force
- Distance – the presence of foreign body (rust, tape, air) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
- Load vector – maximum parameter is available only during pulling at a 90° angle. The shear force of the magnet along the surface is typically many times lower (approx. 1/5 of the lifting capacity).
- Base massiveness – too thin steel does not close the flux, causing part of the flux to be wasted into the air.
- Material type – the best choice is high-permeability steel. Hardened steels may generate lower lifting capacity.
- Plate texture – smooth surfaces guarantee perfect abutment, which increases force. Rough surfaces weaken the grip.
- Temperature – temperature increase results in weakening of force. It is worth remembering the thermal limit for a given model.
Lifting capacity was determined with the use of a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, in contrast under parallel forces the load capacity is reduced by as much as fivefold. In addition, even a small distance between the magnet and the plate decreases the load capacity.
Warnings
Thermal limits
Regular neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. The loss of strength is permanent.
Safe distance
Powerful magnetic fields can corrupt files on credit cards, hard drives, and storage devices. Maintain a gap of at least 10 cm.
Magnets are brittle
Despite the nickel coating, neodymium is brittle and not impact-resistant. Do not hit, as the magnet may crumble into hazardous fragments.
Medical interference
Patients with a pacemaker should keep an safe separation from magnets. The magnetic field can disrupt the functioning of the implant.
Dust explosion hazard
Fire hazard: Rare earth powder is explosive. Avoid machining magnets in home conditions as this may cause fire.
Crushing force
Pinching hazard: The pulling power is so great that it can cause blood blisters, pinching, and broken bones. Protective gloves are recommended.
GPS and phone interference
A strong magnetic field disrupts the functioning of compasses in smartphones and GPS navigation. Maintain magnets near a smartphone to prevent damaging the sensors.
Skin irritation risks
Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If redness happens, immediately stop handling magnets and wear gloves.
Adults only
These products are not intended for children. Swallowing multiple magnets may result in them attracting across intestines, which constitutes a severe health hazard and requires urgent medical intervention.
Do not underestimate power
Before starting, read the rules. Sudden snapping can destroy the magnet or injure your hand. Think ahead.
