MW 12x2 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010017
GTIN/EAN: 5906301810162
Diameter Ø
12 mm [±0,1 mm]
Height
2 mm [±0,1 mm]
Weight
1.7 g
Magnetization Direction
↑ axial
Load capacity
1.39 kg / 13.66 N
Magnetic Induction
195.97 mT / 1960 Gs
Coating
[NiCuNi] Nickel
1.132 ZŁ with VAT / pcs + price for transport
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Technical details - MW 12x2 / N38 - cylindrical magnet
Specification / characteristics - MW 12x2 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010017 |
| GTIN/EAN | 5906301810162 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 12 mm [±0,1 mm] |
| Height | 2 mm [±0,1 mm] |
| Weight | 1.7 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 1.39 kg / 13.66 N |
| Magnetic Induction ~ ? | 195.97 mT / 1960 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 product - data
The following information constitute the direct effect of a physical analysis. Results rely on models for the material Nd2Fe14B. Actual performance may differ. Please consider these calculations as a supplementary guide for designers.
Table 1: Static pull force (force vs distance) - characteristics
MW 12x2 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
1959 Gs
195.9 mT
|
1.39 kg / 3.06 pounds
1390.0 g / 13.6 N
|
safe |
| 1 mm |
1753 Gs
175.3 mT
|
1.11 kg / 2.45 pounds
1113.5 g / 10.9 N
|
safe |
| 2 mm |
1479 Gs
147.9 mT
|
0.79 kg / 1.75 pounds
791.7 g / 7.8 N
|
safe |
| 3 mm |
1196 Gs
119.6 mT
|
0.52 kg / 1.14 pounds
518.4 g / 5.1 N
|
safe |
| 5 mm |
738 Gs
73.8 mT
|
0.20 kg / 0.44 pounds
197.4 g / 1.9 N
|
safe |
| 10 mm |
229 Gs
22.9 mT
|
0.02 kg / 0.04 pounds
19.0 g / 0.2 N
|
safe |
| 15 mm |
90 Gs
9.0 mT
|
0.00 kg / 0.01 pounds
2.9 g / 0.0 N
|
safe |
| 20 mm |
43 Gs
4.3 mT
|
0.00 kg / 0.00 pounds
0.7 g / 0.0 N
|
safe |
| 30 mm |
14 Gs
1.4 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
safe |
| 50 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
Table 2: Vertical load (vertical surface)
MW 12x2 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.28 kg / 0.61 pounds
278.0 g / 2.7 N
|
| 1 mm | Stal (~0.2) |
0.22 kg / 0.49 pounds
222.0 g / 2.2 N
|
| 2 mm | Stal (~0.2) |
0.16 kg / 0.35 pounds
158.0 g / 1.5 N
|
| 3 mm | Stal (~0.2) |
0.10 kg / 0.23 pounds
104.0 g / 1.0 N
|
| 5 mm | Stal (~0.2) |
0.04 kg / 0.09 pounds
40.0 g / 0.4 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.01 pounds
4.0 g / 0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 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 (shearing) - behavior on slippery surfaces
MW 12x2 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.42 kg / 0.92 pounds
417.0 g / 4.1 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.28 kg / 0.61 pounds
278.0 g / 2.7 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.14 kg / 0.31 pounds
139.0 g / 1.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.70 kg / 1.53 pounds
695.0 g / 6.8 N
|
Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 12x2 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.14 kg / 0.31 pounds
139.0 g / 1.4 N
|
| 1 mm |
|
0.35 kg / 0.77 pounds
347.5 g / 3.4 N
|
| 2 mm |
|
0.70 kg / 1.53 pounds
695.0 g / 6.8 N
|
| 3 mm |
|
1.04 kg / 2.30 pounds
1042.5 g / 10.2 N
|
| 5 mm |
|
1.39 kg / 3.06 pounds
1390.0 g / 13.6 N
|
| 10 mm |
|
1.39 kg / 3.06 pounds
1390.0 g / 13.6 N
|
| 11 mm |
|
1.39 kg / 3.06 pounds
1390.0 g / 13.6 N
|
| 12 mm |
|
1.39 kg / 3.06 pounds
1390.0 g / 13.6 N
|
Table 5: Thermal resistance (stability) - thermal limit
MW 12x2 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
1.39 kg / 3.06 pounds
1390.0 g / 13.6 N
|
OK |
| 40 °C | -2.2% |
1.36 kg / 3.00 pounds
1359.4 g / 13.3 N
|
OK |
| 60 °C | -4.4% |
1.33 kg / 2.93 pounds
1328.8 g / 13.0 N
|
|
| 80 °C | -6.6% |
1.30 kg / 2.86 pounds
1298.3 g / 12.7 N
|
|
| 100 °C | -28.8% |
0.99 kg / 2.18 pounds
989.7 g / 9.7 N
|
Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 12x2 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
2.68 kg / 5.90 pounds
3 435 Gs
|
0.40 kg / 0.88 pounds
401 g / 3.9 N
|
N/A |
| 1 mm |
2.44 kg / 5.37 pounds
3 739 Gs
|
0.37 kg / 0.81 pounds
366 g / 3.6 N
|
2.19 kg / 4.84 pounds
~0 Gs
|
| 2 mm |
2.14 kg / 4.73 pounds
3 507 Gs
|
0.32 kg / 0.71 pounds
322 g / 3.2 N
|
1.93 kg / 4.25 pounds
~0 Gs
|
| 3 mm |
1.83 kg / 4.04 pounds
3 241 Gs
|
0.27 kg / 0.61 pounds
275 g / 2.7 N
|
1.65 kg / 3.63 pounds
~0 Gs
|
| 5 mm |
1.24 kg / 2.74 pounds
2 671 Gs
|
0.19 kg / 0.41 pounds
187 g / 1.8 N
|
1.12 kg / 2.47 pounds
~0 Gs
|
| 10 mm |
0.38 kg / 0.84 pounds
1 476 Gs
|
0.06 kg / 0.13 pounds
57 g / 0.6 N
|
0.34 kg / 0.75 pounds
~0 Gs
|
| 20 mm |
0.04 kg / 0.08 pounds
458 Gs
|
0.01 kg / 0.01 pounds
5 g / 0.1 N
|
0.03 kg / 0.07 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
47 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
28 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
18 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
13 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
9 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
7 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) - warnings
MW 12x2 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 4.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 3.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 3.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 2.5 cm |
| Remote | 50 Gs (5.0 mT) | 2.0 cm |
| Payment card | 400 Gs (40.0 mT) | 1.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Dynamics (cracking risk) - collision effects
MW 12x2 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
29.08 km/h
(8.08 m/s)
|
0.06 J | |
| 30 mm |
49.95 km/h
(13.88 m/s)
|
0.16 J | |
| 50 mm |
64.48 km/h
(17.91 m/s)
|
0.27 J | |
| 100 mm |
91.19 km/h
(25.33 m/s)
|
0.55 J |
Table 9: Corrosion resistance
MW 12x2 / 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 12x2 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 2 665 Mx | 26.7 µWb |
| Pc Coefficient | 0.25 | Low (Flat) |
Table 11: Submerged application
MW 12x2 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 1.39 kg | Standard |
| Water (riverbed) |
1.59 kg
(+0.20 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Note: On a vertical surface, the magnet retains only a fraction of its max power.
2. Steel saturation
*Thin steel (e.g. 0.5mm PC case) drastically weakens the holding force.
3. Temperature resistance
*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) = 0.25
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.
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other products
Strengths and weaknesses of Nd2Fe14B magnets.
Benefits
- They virtually do not lose power, because even after 10 years the performance loss is only ~1% (based on calculations),
- They possess excellent resistance to magnetic field loss due to opposing magnetic fields,
- By covering with a shiny layer of nickel, the element has an nice look,
- They are known for high magnetic induction at the operating surface, which affects their effectiveness,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
- Possibility of custom shaping and modifying to atypical needs,
- Wide application in modern industrial fields – they find application in computer drives, brushless drives, precision medical tools, also industrial machines.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Weaknesses
- At strong impacts they can break, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
- They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
- Limited possibility of making threads in the magnet and complex shapes - recommended is cover - magnetic holder.
- 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 components of these products can complicate diagnosis medical when they are in the body.
- Due to expensive raw materials, their price is relatively high,
Holding force characteristics
Optimal lifting capacity of a neodymium magnet – what contributes to it?
- using a base made of low-carbon steel, acting as a ideal flux conductor
- with a cross-section minimum 10 mm
- with a surface perfectly flat
- without any air gap between the magnet and steel
- during detachment in a direction perpendicular to the mounting surface
- at ambient temperature approx. 20 degrees Celsius
Determinants of practical lifting force of a magnet
- Gap between surfaces – every millimeter of separation (caused e.g. by veneer or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
- Angle of force application – maximum parameter is available only during perpendicular pulling. The resistance to sliding of the magnet along the plate is standardly several times lower (approx. 1/5 of the lifting capacity).
- Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of converting into lifting capacity.
- Steel grade – the best choice is high-permeability steel. Stainless steels may have worse magnetic properties.
- Surface finish – full contact is possible only on smooth steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
- Thermal factor – high temperature weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity was determined using a polished steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under attempts to slide the magnet the load capacity is reduced by as much as fivefold. Additionally, even a small distance between the magnet and the plate reduces the holding force.
H&S for magnets
Fragile material
NdFeB magnets are ceramic materials, which means they are prone to chipping. Collision of two magnets leads to them cracking into small pieces.
Dust explosion hazard
Powder created during machining of magnets is combustible. Avoid drilling into magnets unless you are an expert.
Bodily injuries
Watch your fingers. Two powerful magnets will snap together instantly with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!
ICD Warning
People with a ICD must keep an safe separation from magnets. The magnetism can disrupt the functioning of the life-saving device.
GPS and phone interference
GPS units and mobile phones are extremely susceptible to magnetic fields. Close proximity with a powerful NdFeB magnet can ruin the sensors in your phone.
Danger to the youngest
NdFeB magnets are not intended for children. Accidental ingestion of a few magnets may result in them attracting across intestines, which poses a critical condition and requires immediate surgery.
Metal Allergy
Medical facts indicate that nickel (the usual finish) is a strong allergen. If you have an allergy, refrain from direct skin contact or choose versions in plastic housing.
Immense force
Before starting, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.
Protect data
Avoid bringing magnets near a wallet, computer, or TV. The magnetic field can permanently damage these devices and wipe information from cards.
Heat warning
Avoid heat. NdFeB magnets are susceptible to temperature. If you require resistance above 80°C, look for special high-temperature series (H, SH, UH).
