MW 12x1 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010015
GTIN/EAN: 5906301810148
Diameter Ø
12 mm [±0,1 mm]
Height
1 mm [±0,1 mm]
Weight
0.85 g
Magnetization Direction
↑ axial
Load capacity
0.42 kg / 4.15 N
Magnetic Induction
101.90 mT / 1019 Gs
Coating
[NiCuNi] Nickel
0.578 ZŁ with VAT / pcs + price for transport
0.470 ZŁ net + 23% VAT / pcs
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Physical properties - MW 12x1 / N38 - cylindrical magnet
Specification / characteristics - MW 12x1 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010015 |
| GTIN/EAN | 5906301810148 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 12 mm [±0,1 mm] |
| Height | 1 mm [±0,1 mm] |
| Weight | 0.85 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.42 kg / 4.15 N |
| Magnetic Induction ~ ? | 101.90 mT / 1019 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 modeling of the product - data
These values constitute the direct effect of a physical calculation. Values were calculated on algorithms for the class Nd2Fe14B. Operational conditions might slightly differ from theoretical values. Treat these calculations as a reference point during assembly planning.
Table 1: Static pull force (force vs gap) - characteristics
MW 12x1 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
1019 Gs
101.9 mT
|
0.42 kg / 0.93 LBS
420.0 g / 4.1 N
|
safe |
| 1 mm |
941 Gs
94.1 mT
|
0.36 kg / 0.79 LBS
358.5 g / 3.5 N
|
safe |
| 2 mm |
812 Gs
81.2 mT
|
0.27 kg / 0.59 LBS
266.8 g / 2.6 N
|
safe |
| 3 mm |
666 Gs
66.6 mT
|
0.18 kg / 0.40 LBS
179.7 g / 1.8 N
|
safe |
| 5 mm |
415 Gs
41.5 mT
|
0.07 kg / 0.15 LBS
69.7 g / 0.7 N
|
safe |
| 10 mm |
126 Gs
12.6 mT
|
0.01 kg / 0.01 LBS
6.5 g / 0.1 N
|
safe |
| 15 mm |
49 Gs
4.9 mT
|
0.00 kg / 0.00 LBS
1.0 g / 0.0 N
|
safe |
| 20 mm |
23 Gs
2.3 mT
|
0.00 kg / 0.00 LBS
0.2 g / 0.0 N
|
safe |
| 30 mm |
7 Gs
0.7 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
| 50 mm |
2 Gs
0.2 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
Table 2: Sliding capacity (vertical surface)
MW 12x1 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.08 kg / 0.19 LBS
84.0 g / 0.8 N
|
| 1 mm | Stal (~0.2) |
0.07 kg / 0.16 LBS
72.0 g / 0.7 N
|
| 2 mm | Stal (~0.2) |
0.05 kg / 0.12 LBS
54.0 g / 0.5 N
|
| 3 mm | Stal (~0.2) |
0.04 kg / 0.08 LBS
36.0 g / 0.4 N
|
| 5 mm | Stal (~0.2) |
0.01 kg / 0.03 LBS
14.0 g / 0.1 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
2.0 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: Vertical assembly (shearing) - vertical pull
MW 12x1 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.13 kg / 0.28 LBS
126.0 g / 1.2 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.08 kg / 0.19 LBS
84.0 g / 0.8 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.04 kg / 0.09 LBS
42.0 g / 0.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.21 kg / 0.46 LBS
210.0 g / 2.1 N
|
Table 4: Steel thickness (substrate influence) - power losses
MW 12x1 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.04 kg / 0.09 LBS
42.0 g / 0.4 N
|
| 1 mm |
|
0.11 kg / 0.23 LBS
105.0 g / 1.0 N
|
| 2 mm |
|
0.21 kg / 0.46 LBS
210.0 g / 2.1 N
|
| 3 mm |
|
0.32 kg / 0.69 LBS
315.0 g / 3.1 N
|
| 5 mm |
|
0.42 kg / 0.93 LBS
420.0 g / 4.1 N
|
| 10 mm |
|
0.42 kg / 0.93 LBS
420.0 g / 4.1 N
|
| 11 mm |
|
0.42 kg / 0.93 LBS
420.0 g / 4.1 N
|
| 12 mm |
|
0.42 kg / 0.93 LBS
420.0 g / 4.1 N
|
Table 5: Thermal resistance (stability) - resistance threshold
MW 12x1 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.42 kg / 0.93 LBS
420.0 g / 4.1 N
|
OK |
| 40 °C | -2.2% |
0.41 kg / 0.91 LBS
410.8 g / 4.0 N
|
OK |
| 60 °C | -4.4% |
0.40 kg / 0.89 LBS
401.5 g / 3.9 N
|
|
| 80 °C | -6.6% |
0.39 kg / 0.86 LBS
392.3 g / 3.8 N
|
|
| 100 °C | -28.8% |
0.30 kg / 0.66 LBS
299.0 g / 2.9 N
|
Table 6: Magnet-Magnet interaction (attraction) - field range
MW 12x1 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
0.72 kg / 1.60 LBS
1 959 Gs
|
0.11 kg / 0.24 LBS
109 g / 1.1 N
|
N/A |
| 1 mm |
0.68 kg / 1.50 LBS
1 978 Gs
|
0.10 kg / 0.23 LBS
102 g / 1.0 N
|
0.61 kg / 1.35 LBS
~0 Gs
|
| 2 mm |
0.62 kg / 1.36 LBS
1 883 Gs
|
0.09 kg / 0.20 LBS
93 g / 0.9 N
|
0.56 kg / 1.23 LBS
~0 Gs
|
| 3 mm |
0.54 kg / 1.19 LBS
1 762 Gs
|
0.08 kg / 0.18 LBS
81 g / 0.8 N
|
0.49 kg / 1.07 LBS
~0 Gs
|
| 5 mm |
0.38 kg / 0.84 LBS
1 479 Gs
|
0.06 kg / 0.13 LBS
57 g / 0.6 N
|
0.34 kg / 0.76 LBS
~0 Gs
|
| 10 mm |
0.12 kg / 0.26 LBS
830 Gs
|
0.02 kg / 0.04 LBS
18 g / 0.2 N
|
0.11 kg / 0.24 LBS
~0 Gs
|
| 20 mm |
0.01 kg / 0.02 LBS
253 Gs
|
0.00 kg / 0.00 LBS
2 g / 0.0 N
|
0.01 kg / 0.02 LBS
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 LBS
25 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
15 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
10 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
7 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
5 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
3 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Hazards (implants) - warnings
MW 12x1 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 3.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 3.0 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 2.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 2.0 cm |
| Remote | 50 Gs (5.0 mT) | 1.5 cm |
| Payment card | 400 Gs (40.0 mT) | 1.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 0.5 cm |
Table 8: Impact energy (cracking risk) - warning
MW 12x1 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
22.63 km/h
(6.29 m/s)
|
0.02 J | |
| 30 mm |
38.83 km/h
(10.79 m/s)
|
0.05 J | |
| 50 mm |
50.13 km/h
(13.92 m/s)
|
0.08 J | |
| 100 mm |
70.89 km/h
(19.69 m/s)
|
0.16 J |
Table 9: Coating parameters (durability)
MW 12x1 / 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 12x1 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 1 564 Mx | 15.6 µWb |
| Pc Coefficient | 0.13 | Low (Flat) |
Table 11: Submerged application
MW 12x1 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.42 kg | Standard |
| Water (riverbed) |
0.48 kg
(+0.06 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Note: On a vertical surface, the magnet holds merely ~20% of its max power.
2. Plate thickness effect
*Thin metal sheet (e.g. computer case) drastically weakens the holding force.
3. Thermal stability
*For standard magnets, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.13
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 |
Other offers
Advantages as well as disadvantages of Nd2Fe14B magnets.
Advantages
- They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (based on calculations),
- Magnets perfectly resist against loss of magnetization caused by external fields,
- A magnet with a smooth silver surface has better aesthetics,
- They show high magnetic induction at the operating surface, which improves attraction properties,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Possibility of accurate creating as well as adapting to precise needs,
- Versatile presence in high-tech industry – they find application in hard drives, drive modules, precision medical tools, and multitasking production systems.
- Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which makes them useful in compact constructions
Limitations
- To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
- We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
- We recommend casing - magnetic mechanism, due to difficulties in creating threads inside the magnet and complicated forms.
- Possible danger to health – tiny shards of magnets are risky, if swallowed, which gains importance in the context of child safety. It is also worth noting that small elements of these devices are able to disrupt the diagnostic process medical in case of swallowing.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities
Holding force characteristics
Best holding force of the magnet in ideal parameters – what contributes to it?
- on a block made of mild steel, effectively closing the magnetic flux
- with a cross-section no less than 10 mm
- with an ground contact surface
- with zero gap (without coatings)
- for force applied at a right angle (in the magnet axis)
- at standard ambient temperature
Magnet lifting force in use – key factors
- Clearance – the presence of any layer (paint, tape, gap) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
- Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the maximum value.
- Metal 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 – not every steel reacts the same. Alloy additives weaken the interaction with the magnet.
- Plate texture – smooth surfaces ensure maximum contact, which improves field saturation. Rough surfaces reduce efficiency.
- Thermal conditions – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures they can be stronger (up to a certain limit).
Lifting capacity was determined with the use of a polished steel plate of optimal thickness (min. 20 mm), under vertically applied force, however under shearing force the holding force is lower. In addition, even a slight gap between the magnet and the plate lowers the lifting capacity.
Safety rules for work with neodymium magnets
Phone sensors
Remember: rare earth magnets produce a field that disrupts sensitive sensors. Keep a separation from your phone, device, and navigation systems.
Hand protection
Big blocks can break fingers in a fraction of a second. Do not place your hand betwixt two strong magnets.
Dust is flammable
Combustion risk: Rare earth powder is explosive. Avoid machining magnets in home conditions as this risks ignition.
Powerful field
Handle magnets consciously. Their huge power can surprise even experienced users. Plan your moves and respect their power.
Magnetic media
Intense magnetic fields can erase data on credit cards, HDDs, and other magnetic media. Keep a distance of at least 10 cm.
Allergy Warning
Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If an allergic reaction happens, immediately stop working with magnets and use protective gear.
Demagnetization risk
Regular neodymium magnets (N-type) lose power when the temperature surpasses 80°C. This process is irreversible.
This is not a toy
These products are not toys. Eating several magnets can lead to them pinching intestinal walls, which constitutes a severe health hazard and requires immediate surgery.
Implant safety
Life threat: Strong magnets can deactivate heart devices and defibrillators. Stay away if you have medical devices.
Magnet fragility
Watch out for shards. Magnets can explode upon violent connection, launching shards into the air. Wear goggles.
