MW 12x8 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010022
GTIN/EAN: 5906301810216
Diameter Ø
12 mm [±0,1 mm]
Height
8 mm [±0,1 mm]
Weight
6.79 g
Magnetization Direction
↑ axial
Load capacity
4.93 kg / 48.32 N
Magnetic Induction
495.50 mT / 4955 Gs
Coating
[NiCuNi] Nickel
2.47 ZŁ with VAT / pcs + price for transport
2.01 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Pick up the phone and ask
+48 22 499 98 98
alternatively send us a note by means of
form
the contact section.
Strength and appearance of a neodymium magnet can be calculated on our
our magnetic calculator.
Order by 14:00 and we’ll ship today!
Technical data - MW 12x8 / N38 - cylindrical magnet
Specification / characteristics - MW 12x8 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010022 |
| GTIN/EAN | 5906301810216 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 12 mm [±0,1 mm] |
| Height | 8 mm [±0,1 mm] |
| Weight | 6.79 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 4.93 kg / 48.32 N |
| Magnetic Induction ~ ? | 495.50 mT / 4955 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 assembly - data
These data constitute the direct effect of a engineering analysis. Results were calculated on algorithms for the material Nd2Fe14B. Operational performance may differ from theoretical values. Use these calculations as a supplementary guide when designing systems.
Table 1: Static pull force (force vs gap) - characteristics
MW 12x8 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4952 Gs
495.2 mT
|
4.93 kg / 10.87 pounds
4930.0 g / 48.4 N
|
warning |
| 1 mm |
4139 Gs
413.9 mT
|
3.44 kg / 7.59 pounds
3445.0 g / 33.8 N
|
warning |
| 2 mm |
3356 Gs
335.6 mT
|
2.26 kg / 4.99 pounds
2264.2 g / 22.2 N
|
warning |
| 3 mm |
2670 Gs
267.0 mT
|
1.43 kg / 3.16 pounds
1433.5 g / 14.1 N
|
safe |
| 5 mm |
1660 Gs
166.0 mT
|
0.55 kg / 1.22 pounds
554.1 g / 5.4 N
|
safe |
| 10 mm |
565 Gs
56.5 mT
|
0.06 kg / 0.14 pounds
64.3 g / 0.6 N
|
safe |
| 15 mm |
243 Gs
24.3 mT
|
0.01 kg / 0.03 pounds
11.8 g / 0.1 N
|
safe |
| 20 mm |
124 Gs
12.4 mT
|
0.00 kg / 0.01 pounds
3.1 g / 0.0 N
|
safe |
| 30 mm |
45 Gs
4.5 mT
|
0.00 kg / 0.00 pounds
0.4 g / 0.0 N
|
safe |
| 50 mm |
11 Gs
1.1 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
Table 2: Vertical capacity (vertical surface)
MW 12x8 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.99 kg / 2.17 pounds
986.0 g / 9.7 N
|
| 1 mm | Stal (~0.2) |
0.69 kg / 1.52 pounds
688.0 g / 6.7 N
|
| 2 mm | Stal (~0.2) |
0.45 kg / 1.00 pounds
452.0 g / 4.4 N
|
| 3 mm | Stal (~0.2) |
0.29 kg / 0.63 pounds
286.0 g / 2.8 N
|
| 5 mm | Stal (~0.2) |
0.11 kg / 0.24 pounds
110.0 g / 1.1 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: Vertical assembly (sliding) - behavior on slippery surfaces
MW 12x8 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
1.48 kg / 3.26 pounds
1479.0 g / 14.5 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.99 kg / 2.17 pounds
986.0 g / 9.7 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.49 kg / 1.09 pounds
493.0 g / 4.8 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
2.47 kg / 5.43 pounds
2465.0 g / 24.2 N
|
Table 4: Material efficiency (substrate influence) - power losses
MW 12x8 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.49 kg / 1.09 pounds
493.0 g / 4.8 N
|
| 1 mm |
|
1.23 kg / 2.72 pounds
1232.5 g / 12.1 N
|
| 2 mm |
|
2.47 kg / 5.43 pounds
2465.0 g / 24.2 N
|
| 3 mm |
|
3.70 kg / 8.15 pounds
3697.5 g / 36.3 N
|
| 5 mm |
|
4.93 kg / 10.87 pounds
4930.0 g / 48.4 N
|
| 10 mm |
|
4.93 kg / 10.87 pounds
4930.0 g / 48.4 N
|
| 11 mm |
|
4.93 kg / 10.87 pounds
4930.0 g / 48.4 N
|
| 12 mm |
|
4.93 kg / 10.87 pounds
4930.0 g / 48.4 N
|
Table 5: Thermal stability (material behavior) - power drop
MW 12x8 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
4.93 kg / 10.87 pounds
4930.0 g / 48.4 N
|
OK |
| 40 °C | -2.2% |
4.82 kg / 10.63 pounds
4821.5 g / 47.3 N
|
OK |
| 60 °C | -4.4% |
4.71 kg / 10.39 pounds
4713.1 g / 46.2 N
|
OK |
| 80 °C | -6.6% |
4.60 kg / 10.15 pounds
4604.6 g / 45.2 N
|
|
| 100 °C | -28.8% |
3.51 kg / 7.74 pounds
3510.2 g / 34.4 N
|
Table 6: Two magnets (repulsion) - field collision
MW 12x8 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
17.10 kg / 37.69 pounds
5 795 Gs
|
2.56 kg / 5.65 pounds
2565 g / 25.2 N
|
N/A |
| 1 mm |
14.44 kg / 31.83 pounds
9 101 Gs
|
2.17 kg / 4.77 pounds
2166 g / 21.2 N
|
12.99 kg / 28.64 pounds
~0 Gs
|
| 2 mm |
11.95 kg / 26.34 pounds
8 279 Gs
|
1.79 kg / 3.95 pounds
1792 g / 17.6 N
|
10.75 kg / 23.71 pounds
~0 Gs
|
| 3 mm |
9.74 kg / 21.48 pounds
7 477 Gs
|
1.46 kg / 3.22 pounds
1462 g / 14.3 N
|
8.77 kg / 19.33 pounds
~0 Gs
|
| 5 mm |
6.27 kg / 13.82 pounds
5 997 Gs
|
0.94 kg / 2.07 pounds
940 g / 9.2 N
|
5.64 kg / 12.44 pounds
~0 Gs
|
| 10 mm |
1.92 kg / 4.24 pounds
3 320 Gs
|
0.29 kg / 0.64 pounds
288 g / 2.8 N
|
1.73 kg / 3.81 pounds
~0 Gs
|
| 20 mm |
0.22 kg / 0.49 pounds
1 131 Gs
|
0.03 kg / 0.07 pounds
33 g / 0.3 N
|
0.20 kg / 0.44 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.01 pounds
142 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 pounds
89 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
59 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
41 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
30 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
23 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Safety (HSE) (implants) - warnings
MW 12x8 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 7.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 5.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 4.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 3.5 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: Impact energy (cracking risk) - collision effects
MW 12x8 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
27.40 km/h
(7.61 m/s)
|
0.20 J | |
| 30 mm |
47.07 km/h
(13.08 m/s)
|
0.58 J | |
| 50 mm |
60.77 km/h
(16.88 m/s)
|
0.97 J | |
| 100 mm |
85.94 km/h
(23.87 m/s)
|
1.93 J |
Table 9: Corrosion resistance
MW 12x8 / 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 12x8 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 5 650 Mx | 56.5 µWb |
| Pc Coefficient | 0.71 | High (Stable) |
Table 11: Submerged application
MW 12x8 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 4.93 kg | Standard |
| Water (riverbed) |
5.64 kg
(+0.71 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Caution: On a vertical surface, the magnet retains only a fraction of its perpendicular strength.
2. Plate thickness effect
*Thin steel (e.g. computer case) significantly weakens the holding force.
3. Thermal stability
*For N38 grade, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.71
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% |
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 neodymium magnets.
Benefits
- They do not lose power, even after approximately ten years – the reduction in strength is only ~1% (theoretically),
- They have excellent resistance to weakening of magnetic properties due to external fields,
- In other words, due to the aesthetic finish of nickel, the element gains visual value,
- The surface of neodymium magnets generates a strong magnetic field – this is a distinguishing feature,
- Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
- Thanks to freedom in forming and the capacity to adapt to client solutions,
- Fundamental importance in modern industrial fields – they are commonly used in hard drives, electromotive mechanisms, medical devices, as well as complex engineering applications.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Weaknesses
- At very strong impacts they can break, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
- Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
- Limited possibility of making threads in the magnet and complicated shapes - recommended is casing - magnet mounting.
- Health risk resulting from small fragments of magnets are risky, when accidentally swallowed, which becomes key in the context of child safety. It is also worth noting that tiny parts of these devices are able to be problematic in diagnostics medical after entering the body.
- With budget limitations the cost of neodymium magnets is economically unviable,
Lifting parameters
Best holding force of the magnet in ideal parameters – what it depends on?
- using a sheet made of mild steel, functioning as a magnetic yoke
- whose thickness reaches at least 10 mm
- with an polished touching surface
- with direct contact (no paint)
- during pulling in a direction vertical to the mounting surface
- in temp. approx. 20°C
What influences lifting capacity in practice
- Gap between surfaces – every millimeter of separation (caused e.g. by veneer or unevenness) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
- Force direction – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of maximum force).
- Steel thickness – insufficiently thick plate causes magnetic saturation, causing part of the flux to be lost to the other side.
- Metal type – not every steel attracts identically. Alloy additives weaken the interaction with the magnet.
- Surface condition – ground elements ensure maximum contact, which improves force. Uneven metal weaken the grip.
- Thermal factor – high temperature reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity was measured using a polished steel plate of optimal thickness (min. 20 mm), under vertically applied force, however under parallel forces the holding force is lower. In addition, even a minimal clearance between the magnet and the plate reduces the lifting capacity.
H&S for magnets
Compass and GPS
Note: rare earth magnets produce a field that interferes with precision electronics. Keep a separation from your mobile, tablet, and navigation systems.
Magnetic media
Powerful magnetic fields can erase data on payment cards, HDDs, and other magnetic media. Keep a distance of at least 10 cm.
Safe operation
Be careful. Rare earth magnets act from a distance and connect with huge force, often faster than you can react.
Danger to pacemakers
Medical warning: Neodymium magnets can turn off heart devices and defibrillators. Stay away if you have medical devices.
Fragile material
Neodymium magnets are sintered ceramics, meaning they are prone to chipping. Collision of two magnets will cause them shattering into shards.
Do not give to children
Neodymium magnets are not toys. Accidental ingestion of multiple magnets may result in them connecting inside the digestive tract, which poses a severe health hazard and requires immediate surgery.
Mechanical processing
Mechanical processing of neodymium magnets poses a fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.
Demagnetization risk
Avoid heat. NdFeB magnets are susceptible to heat. If you need resistance above 80°C, inquire about special high-temperature series (H, SH, UH).
Pinching danger
Big blocks can smash fingers in a fraction of a second. Never put your hand betwixt two strong magnets.
Skin irritation risks
Medical facts indicate that the nickel plating (standard magnet coating) is a potent allergen. If you have an allergy, avoid direct skin contact or choose coated magnets.
