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
1.882 ZŁ with VAT / pcs + price for transport
1.530 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical details - 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 |
Technical simulation of the magnet - data
These information are the direct effect of a physical calculation. Results are based on models for the class Nd2Fe14B. Real-world conditions may deviate from the simulation results. Please consider these data as a reference point for designers.
Table 1: Static pull force (force vs gap) - interaction chart
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 pounds
4600.0 g / 45.1 N
|
warning |
| 1 mm |
3688 Gs
368.8 mT
|
3.27 kg / 7.20 pounds
3265.4 g / 32.0 N
|
warning |
| 2 mm |
2999 Gs
299.9 mT
|
2.16 kg / 4.76 pounds
2159.7 g / 21.2 N
|
warning |
| 3 mm |
2386 Gs
238.6 mT
|
1.37 kg / 3.01 pounds
1366.7 g / 13.4 N
|
low risk |
| 5 mm |
1474 Gs
147.4 mT
|
0.52 kg / 1.15 pounds
521.4 g / 5.1 N
|
low risk |
| 10 mm |
489 Gs
48.9 mT
|
0.06 kg / 0.13 pounds
57.4 g / 0.6 N
|
low risk |
| 15 mm |
205 Gs
20.5 mT
|
0.01 kg / 0.02 pounds
10.1 g / 0.1 N
|
low risk |
| 20 mm |
103 Gs
10.3 mT
|
0.00 kg / 0.01 pounds
2.5 g / 0.0 N
|
low risk |
| 30 mm |
36 Gs
3.6 mT
|
0.00 kg / 0.00 pounds
0.3 g / 0.0 N
|
low risk |
| 50 mm |
9 Gs
0.9 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
low risk |
Table 2: Sliding hold (wall)
MW 12x6 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.92 kg / 2.03 pounds
920.0 g / 9.0 N
|
| 1 mm | Stal (~0.2) |
0.65 kg / 1.44 pounds
654.0 g / 6.4 N
|
| 2 mm | Stal (~0.2) |
0.43 kg / 0.95 pounds
432.0 g / 4.2 N
|
| 3 mm | Stal (~0.2) |
0.27 kg / 0.60 pounds
274.0 g / 2.7 N
|
| 5 mm | Stal (~0.2) |
0.10 kg / 0.23 pounds
104.0 g / 1.0 N
|
| 10 mm | Stal (~0.2) |
0.01 kg / 0.03 pounds
12.0 g / 0.1 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
2.0 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 (sliding) - vertical pull
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 pounds
1380.0 g / 13.5 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.92 kg / 2.03 pounds
920.0 g / 9.0 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.46 kg / 1.01 pounds
460.0 g / 4.5 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
2.30 kg / 5.07 pounds
2300.0 g / 22.6 N
|
Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 12x6 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.46 kg / 1.01 pounds
460.0 g / 4.5 N
|
| 1 mm |
|
1.15 kg / 2.54 pounds
1150.0 g / 11.3 N
|
| 2 mm |
|
2.30 kg / 5.07 pounds
2300.0 g / 22.6 N
|
| 3 mm |
|
3.45 kg / 7.61 pounds
3450.0 g / 33.8 N
|
| 5 mm |
|
4.60 kg / 10.14 pounds
4600.0 g / 45.1 N
|
| 10 mm |
|
4.60 kg / 10.14 pounds
4600.0 g / 45.1 N
|
| 11 mm |
|
4.60 kg / 10.14 pounds
4600.0 g / 45.1 N
|
| 12 mm |
|
4.60 kg / 10.14 pounds
4600.0 g / 45.1 N
|
Table 5: Thermal stability (material behavior) - thermal limit
MW 12x6 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
4.60 kg / 10.14 pounds
4600.0 g / 45.1 N
|
OK |
| 40 °C | -2.2% |
4.50 kg / 9.92 pounds
4498.8 g / 44.1 N
|
OK |
| 60 °C | -4.4% |
4.40 kg / 9.70 pounds
4397.6 g / 43.1 N
|
|
| 80 °C | -6.6% |
4.30 kg / 9.47 pounds
4296.4 g / 42.1 N
|
|
| 100 °C | -28.8% |
3.28 kg / 7.22 pounds
3275.2 g / 32.1 N
|
Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 12x6 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
13.36 kg / 29.45 pounds
5 536 Gs
|
2.00 kg / 4.42 pounds
2004 g / 19.7 N
|
N/A |
| 1 mm |
11.39 kg / 25.10 pounds
8 082 Gs
|
1.71 kg / 3.77 pounds
1708 g / 16.8 N
|
10.25 kg / 22.59 pounds
~0 Gs
|
| 2 mm |
9.48 kg / 20.91 pounds
7 376 Gs
|
1.42 kg / 3.14 pounds
1423 g / 14.0 N
|
8.54 kg / 18.82 pounds
~0 Gs
|
| 3 mm |
7.77 kg / 17.12 pounds
6 675 Gs
|
1.17 kg / 2.57 pounds
1165 g / 11.4 N
|
6.99 kg / 15.41 pounds
~0 Gs
|
| 5 mm |
5.01 kg / 11.05 pounds
5 361 Gs
|
0.75 kg / 1.66 pounds
752 g / 7.4 N
|
4.51 kg / 9.94 pounds
~0 Gs
|
| 10 mm |
1.51 kg / 3.34 pounds
2 948 Gs
|
0.23 kg / 0.50 pounds
227 g / 2.2 N
|
1.36 kg / 3.01 pounds
~0 Gs
|
| 20 mm |
0.17 kg / 0.37 pounds
978 Gs
|
0.02 kg / 0.06 pounds
25 g / 0.2 N
|
0.15 kg / 0.33 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.01 pounds
116 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
72 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
48 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
33 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
24 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
18 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Protective zones (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 |
| Mobile device | 40 Gs (4.0 mT) | 3.0 cm |
| Remote | 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 (cracking risk) - collision effects
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: Construction 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: Physics of underwater searching
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. Vertical hold
*Note: On a vertical wall, the magnet retains just a fraction of its nominal pull.
2. Steel thickness impact
*Thin metal sheet (e.g. 0.5mm PC case) severely reduces the holding force.
3. Power loss vs temp
*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) = 0.59
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Strengths and weaknesses of Nd2Fe14B magnets.
Strengths
- They do not lose strength, even over nearly 10 years – the drop in lifting capacity is only ~1% (theoretically),
- They show high resistance to demagnetization induced by external field influence,
- The use of an refined layer of noble metals (nickel, gold, silver) causes the element to have aesthetics,
- Neodymium magnets achieve maximum magnetic induction on a small area, which ensures high operational effectiveness,
- Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
- In view of the ability of accurate molding and customization to custom projects, NdFeB magnets can be modeled in a variety of geometric configurations, which makes them more universal,
- Significant place in advanced technology sectors – they are commonly used in data components, electromotive mechanisms, medical equipment, also modern systems.
- Thanks to concentrated force, small magnets offer high operating force, in miniature format,
Cons
- 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.
- When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their power 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
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
- Limited ability of creating nuts in the magnet and complicated shapes - preferred is a housing - mounting mechanism.
- Possible danger related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child health protection. Furthermore, tiny parts of these products can be problematic in diagnostics medical in case of swallowing.
- Due to expensive raw materials, their price is higher than average,
Holding force characteristics
Optimal lifting capacity of a neodymium magnet – what it depends on?
- using a plate made of low-carbon steel, acting as a circuit closing element
- with a cross-section no less than 10 mm
- with a plane perfectly flat
- with direct contact (no paint)
- during detachment in a direction vertical to the plane
- in stable room temperature
Practical aspects of lifting capacity – factors
- Clearance – existence of foreign body (paint, tape, gap) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
- Direction of force – highest force is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is typically many times lower (approx. 1/5 of the lifting capacity).
- Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
- Material composition – not every steel reacts the same. High carbon content weaken the interaction with the magnet.
- Smoothness – full contact is obtained only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
- Temperature influence – hot environment weakens magnetic field. Too high temperature can permanently damage the magnet.
Lifting capacity was assessed using a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, however under shearing force the lifting capacity is smaller. In addition, even a small distance between the magnet’s surface and the plate decreases the holding force.
H&S for magnets
Fragile material
Beware of splinters. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Wear goggles.
GPS and phone interference
A powerful magnetic field negatively affects the functioning of compasses in phones and GPS navigation. Keep magnets near a smartphone to avoid damaging the sensors.
Dust is flammable
Dust created during cutting of magnets is flammable. Do not drill into magnets without proper cooling and knowledge.
Demagnetization risk
Regular neodymium magnets (N-type) undergo demagnetization when the temperature exceeds 80°C. Damage is permanent.
Handling rules
Use magnets consciously. Their powerful strength can surprise even professionals. Plan your moves and do not underestimate their power.
Electronic devices
Do not bring magnets close to a wallet, computer, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.
Bone fractures
Risk of injury: The pulling power is so great that it can cause blood blisters, pinching, and even bone fractures. Use thick gloves.
Warning for allergy sufferers
Nickel alert: The nickel-copper-nickel coating consists of nickel. If redness happens, cease handling magnets and use protective gear.
Do not give to children
Always keep magnets out of reach of children. Choking hazard is high, and the effects of magnets clamping inside the body are tragic.
Life threat
People with a heart stimulator must keep an safe separation from magnets. The magnetic field can disrupt the operation of the implant.
