MW 12x4 / N52 - cylindrical magnet
cylindrical magnet
Catalog no 010500
GTIN/EAN: 5906301814962
Diameter Ø
12 mm [±0,1 mm]
Height
4 mm [±0,1 mm]
Weight
3.39 g
Magnetization Direction
↑ axial
Load capacity
4.68 kg / 45.89 N
Magnetic Induction
400.45 mT / 4005 Gs
Coating
[NiCuNi] Nickel
2.18 ZŁ with VAT / pcs + price for transport
1.770 ZŁ net + 23% VAT / pcs
bulk discounts:
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Product card - MW 12x4 / N52 - cylindrical magnet
Specification / characteristics - MW 12x4 / N52 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010500 |
| GTIN/EAN | 5906301814962 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 12 mm [±0,1 mm] |
| Height | 4 mm [±0,1 mm] |
| Weight | 3.39 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 4.68 kg / 45.89 N |
| Magnetic Induction ~ ? | 400.45 mT / 4005 Gs |
| Coating | [NiCuNi] Nickel |
| Manufacturing Tolerance | ±0.1 mm |
Magnetic properties of material N52
| properties | values | units |
|---|---|---|
| remenance Br [min. - max.] ? | 14.2-14.7 | kGs |
| remenance Br [min. - max.] ? | 1420-1470 | mT |
| coercivity bHc ? | 10.8-12.5 | kOe |
| coercivity bHc ? | 860-995 | kA/m |
| actual internal force iHc | ≥ 12 | kOe |
| actual internal force iHc | ≥ 955 | kA/m |
| energy density [min. - max.] ? | 48-53 | BH max MGOe |
| energy density [min. - max.] ? | 380-422 | 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 modeling of the assembly - report
These information are the result of a physical calculation. Results are based on models for the material Nd2Fe14B. Actual conditions may differ from theoretical values. Please consider these calculations as a reference point for designers.
Table 1: Static force (pull vs distance) - interaction chart
MW 12x4 / N52
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4003 Gs
400.3 mT
|
4.68 kg / 10.32 LBS
4680.0 g / 45.9 N
|
strong |
| 1 mm |
3438 Gs
343.8 mT
|
3.45 kg / 7.61 LBS
3451.9 g / 33.9 N
|
strong |
| 2 mm |
2824 Gs
282.4 mT
|
2.33 kg / 5.14 LBS
2329.8 g / 22.9 N
|
strong |
| 3 mm |
2255 Gs
225.5 mT
|
1.48 kg / 3.27 LBS
1484.8 g / 14.6 N
|
safe |
| 5 mm |
1386 Gs
138.6 mT
|
0.56 kg / 1.24 LBS
561.3 g / 5.5 N
|
safe |
| 10 mm |
445 Gs
44.5 mT
|
0.06 kg / 0.13 LBS
58.0 g / 0.6 N
|
safe |
| 15 mm |
181 Gs
18.1 mT
|
0.01 kg / 0.02 LBS
9.6 g / 0.1 N
|
safe |
| 20 mm |
89 Gs
8.9 mT
|
0.00 kg / 0.01 LBS
2.3 g / 0.0 N
|
safe |
| 30 mm |
30 Gs
3.0 mT
|
0.00 kg / 0.00 LBS
0.3 g / 0.0 N
|
safe |
| 50 mm |
7 Gs
0.7 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
Table 2: Slippage capacity (vertical surface)
MW 12x4 / N52
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.94 kg / 2.06 LBS
936.0 g / 9.2 N
|
| 1 mm | Stal (~0.2) |
0.69 kg / 1.52 LBS
690.0 g / 6.8 N
|
| 2 mm | Stal (~0.2) |
0.47 kg / 1.03 LBS
466.0 g / 4.6 N
|
| 3 mm | Stal (~0.2) |
0.30 kg / 0.65 LBS
296.0 g / 2.9 N
|
| 5 mm | Stal (~0.2) |
0.11 kg / 0.25 LBS
112.0 g / 1.1 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: Wall mounting (shearing) - vertical pull
MW 12x4 / N52
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
1.40 kg / 3.10 LBS
1404.0 g / 13.8 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.94 kg / 2.06 LBS
936.0 g / 9.2 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.47 kg / 1.03 LBS
468.0 g / 4.6 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
2.34 kg / 5.16 LBS
2340.0 g / 23.0 N
|
Table 4: Steel thickness (substrate influence) - power losses
MW 12x4 / N52
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.47 kg / 1.03 LBS
468.0 g / 4.6 N
|
| 1 mm |
|
1.17 kg / 2.58 LBS
1170.0 g / 11.5 N
|
| 2 mm |
|
2.34 kg / 5.16 LBS
2340.0 g / 23.0 N
|
| 3 mm |
|
3.51 kg / 7.74 LBS
3510.0 g / 34.4 N
|
| 5 mm |
|
4.68 kg / 10.32 LBS
4680.0 g / 45.9 N
|
| 10 mm |
|
4.68 kg / 10.32 LBS
4680.0 g / 45.9 N
|
| 11 mm |
|
4.68 kg / 10.32 LBS
4680.0 g / 45.9 N
|
| 12 mm |
|
4.68 kg / 10.32 LBS
4680.0 g / 45.9 N
|
Table 5: Thermal stability (material behavior) - resistance threshold
MW 12x4 / N52
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
4.68 kg / 10.32 LBS
4680.0 g / 45.9 N
|
OK |
| 40 °C | -2.2% |
4.58 kg / 10.09 LBS
4577.0 g / 44.9 N
|
OK |
| 60 °C | -4.4% |
4.47 kg / 9.86 LBS
4474.1 g / 43.9 N
|
|
| 80 °C | -6.6% |
4.37 kg / 9.64 LBS
4371.1 g / 42.9 N
|
|
| 100 °C | -28.8% |
3.33 kg / 7.35 LBS
3332.2 g / 32.7 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 12x4 / N52
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
11.17 kg / 24.63 LBS
5 771 Gs
|
1.68 kg / 3.69 LBS
1676 g / 16.4 N
|
N/A |
| 1 mm |
9.73 kg / 21.44 LBS
7 470 Gs
|
1.46 kg / 3.22 LBS
1459 g / 14.3 N
|
8.75 kg / 19.30 LBS
~0 Gs
|
| 2 mm |
8.24 kg / 18.16 LBS
6 875 Gs
|
1.24 kg / 2.72 LBS
1236 g / 12.1 N
|
7.42 kg / 16.35 LBS
~0 Gs
|
| 3 mm |
6.83 kg / 15.06 LBS
6 260 Gs
|
1.02 kg / 2.26 LBS
1024 g / 10.1 N
|
6.15 kg / 13.55 LBS
~0 Gs
|
| 5 mm |
4.46 kg / 9.84 LBS
5 060 Gs
|
0.67 kg / 1.48 LBS
670 g / 6.6 N
|
4.02 kg / 8.86 LBS
~0 Gs
|
| 10 mm |
1.34 kg / 2.95 LBS
2 772 Gs
|
0.20 kg / 0.44 LBS
201 g / 2.0 N
|
1.21 kg / 2.66 LBS
~0 Gs
|
| 20 mm |
0.14 kg / 0.30 LBS
891 Gs
|
0.02 kg / 0.05 LBS
21 g / 0.2 N
|
0.12 kg / 0.27 LBS
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 LBS
99 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
61 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
40 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
27 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
20 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
15 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Protective zones (implants) - precautionary measures
MW 12x4 / N52
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 6.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 4.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 3.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 3.0 cm |
| Car key | 50 Gs (5.0 mT) | 2.5 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 12x4 / N52
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
37.76 km/h
(10.49 m/s)
|
0.19 J | |
| 30 mm |
64.91 km/h
(18.03 m/s)
|
0.55 J | |
| 50 mm |
83.79 km/h
(23.27 m/s)
|
0.92 J | |
| 100 mm |
118.50 km/h
(32.92 m/s)
|
1.84 J |
Table 9: Corrosion resistance
MW 12x4 / N52
| 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 12x4 / N52
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 4 794 Mx | 47.9 µWb |
| Pc Coefficient | 0.44 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
MW 12x4 / N52
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 4.68 kg | Standard |
| Water (riverbed) |
5.36 kg
(+0.68 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Warning: On a vertical surface, the magnet holds only a fraction of its nominal pull.
2. Plate thickness effect
*Thin metal sheet (e.g. 0.5mm PC case) drastically limits the holding force.
3. Power loss vs temp
*For N38 material, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.44
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.
Chemical composition
| 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 |
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Pros and cons of Nd2Fe14B magnets.
Strengths
- They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
- Magnets perfectly defend themselves against loss of magnetization caused by external fields,
- Thanks to the elegant finish, the surface of nickel, gold, or silver-plated gives an clean appearance,
- Magnets are distinguished by huge magnetic induction on the surface,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Possibility of exact creating as well as adjusting to defined applications,
- Versatile presence in innovative solutions – they are commonly used in data components, electric drive systems, medical devices, also industrial machines.
- Compactness – despite small sizes they offer powerful magnetic field, 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 strong case, which not only secures them against impacts but also increases their durability
- We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- They rust in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- We suggest a housing - magnetic holder, due to difficulties in creating nuts inside the magnet and complex forms.
- Potential hazard related to microscopic parts of magnets are risky, in case of ingestion, which becomes key in the context of child safety. Additionally, small elements of these products are able to complicate diagnosis medical in case of swallowing.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities
Lifting parameters
Optimal lifting capacity of a neodymium magnet – what affects it?
- using a plate made of low-carbon steel, functioning as a ideal flux conductor
- with a cross-section of at least 10 mm
- characterized by smoothness
- with zero gap (no impurities)
- for force applied at a right angle (in the magnet axis)
- at conditions approx. 20°C
Determinants of lifting force in real conditions
- Distance – existence of foreign body (rust, tape, air) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
- Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
- Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
- Metal type – not every steel attracts identically. High carbon content weaken the attraction effect.
- Surface finish – ideal contact is obtained only on polished steel. Rough texture create air cushions, weakening the magnet.
- Thermal factor – hot environment reduces pulling force. Too high temperature can permanently damage the magnet.
Holding force was checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under parallel forces the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate lowers the holding force.
Warnings
Maximum temperature
Do not overheat. Neodymium magnets are sensitive to heat. If you require operation above 80°C, look for special high-temperature series (H, SH, UH).
Choking Hazard
Always keep magnets out of reach of children. Choking hazard is significant, and the effects of magnets clamping inside the body are fatal.
Bodily injuries
Mind your fingers. Two powerful magnets will snap together instantly with a force of massive weight, crushing everything in their path. Exercise extreme caution!
Implant safety
Warning for patients: Powerful magnets affect medical devices. Keep at least 30 cm distance or ask another person to handle the magnets.
Nickel allergy
Certain individuals experience a hypersensitivity to Ni, which is the common plating for neodymium magnets. Extended handling can result in a rash. It is best to wear protective gloves.
Do not drill into magnets
Drilling and cutting of NdFeB material poses a fire hazard. Magnetic powder reacts violently with oxygen and is hard to extinguish.
Immense force
Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.
Magnetic media
Do not bring magnets close to a wallet, laptop, or TV. The magnetism can permanently damage these devices and erase data from cards.
Material brittleness
Neodymium magnets are ceramic materials, which means they are fragile like glass. Clashing of two magnets will cause them shattering into shards.
Precision electronics
Remember: neodymium magnets produce a field that confuses sensitive sensors. Keep a safe distance from your phone, tablet, and GPS.
