MW 12x10 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010016
GTIN/EAN: 5906301810155
- Diameter Ø
- 12 mm [±0,1 mm]
- Height
- 10 mm [±0,1 mm]
- Weight
- 8.48 g
- Magnetization Direction
- ↑ axial
- Coating
- [NiCuNi] Nickel
2.46 zł net / pcs
3.03 zł with VAT (23% VAT) / pcs
bulk discounts:
Need more?Frequently asked questions
What is the maximum working temperature of a disc magnet?
What is the difference between N38, N42 and N52?
What is the dimensional tolerance?
Engineering report for this magnet
Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.
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Product card - MW 12x10 / N38 - cylindrical magnet
Specification / characteristics - MW 12x10 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010016 |
| GTIN/EAN | 5906301810155 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 12 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 8.48 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 4.83 kg / 47.41 N |
| Magnetic Induction ~ ? | 531.09 mT / 5311 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 | 310 | °C |
| Curie Temperature TF | 590 | °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 magnet - report
Presented values are the direct effect of a engineering analysis. Values were calculated on algorithms for the class Nd2Fe14B. Operational performance might slightly differ. Please consider these calculations as a preliminary roadmap during assembly planning.
Table 1: Static force (force vs distance) - power drop
MW 12x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
5308 Gs
530.8 mT
|
4.83 kg / 10.65 lbs
4830.0 g / 47.4 N
|
warning |
| 1 mm |
4424 Gs
442.4 mT
|
3.36 kg / 7.40 lbs
3355.3 g / 32.9 N
|
warning |
| 2 mm |
3585 Gs
358.5 mT
|
2.20 kg / 4.86 lbs
2203.4 g / 21.6 N
|
warning |
| 3 mm |
2857 Gs
285.7 mT
|
1.40 kg / 3.08 lbs
1399.2 g / 13.7 N
|
low risk |
| 5 mm |
1787 Gs
178.7 mT
|
0.55 kg / 1.21 lbs
547.8 g / 5.4 N
|
low risk |
| 10 mm |
622 Gs
62.2 mT
|
0.07 kg / 0.15 lbs
66.3 g / 0.7 N
|
low risk |
| 15 mm |
272 Gs
27.2 mT
|
0.01 kg / 0.03 lbs
12.7 g / 0.1 N
|
low risk |
| 20 mm |
141 Gs
14.1 mT
|
0.00 kg / 0.01 lbs
3.4 g / 0.0 N
|
low risk |
| 30 mm |
52 Gs
5.2 mT
|
0.00 kg / 0.00 lbs
0.5 g / 0.0 N
|
low risk |
| 50 mm |
13 Gs
1.3 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
low risk |
Table 2: Sliding load (vertical surface)
MW 12x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.97 kg / 2.13 lbs
966.0 g / 9.5 N
|
| 1 mm | Stal (~0.2) |
0.67 kg / 1.48 lbs
672.0 g / 6.6 N
|
| 2 mm | Stal (~0.2) |
0.44 kg / 0.97 lbs
440.0 g / 4.3 N
|
| 3 mm | Stal (~0.2) |
0.28 kg / 0.62 lbs
280.0 g / 2.7 N
|
| 5 mm | Stal (~0.2) |
0.11 kg / 0.24 lbs
110.0 g / 1.1 N
|
| 10 mm | Stal (~0.2) |
0.01 kg / 0.03 lbs
14.0 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: Vertical assembly (shearing) - behavior on slippery surfaces
MW 12x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
1.45 kg / 3.19 lbs
1449.0 g / 14.2 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.97 kg / 2.13 lbs
966.0 g / 9.5 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.48 kg / 1.06 lbs
483.0 g / 4.7 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
2.42 kg / 5.32 lbs
2415.0 g / 23.7 N
|
Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 12x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.48 kg / 1.06 lbs
483.0 g / 4.7 N
|
| 1 mm |
|
1.21 kg / 2.66 lbs
1207.5 g / 11.8 N
|
| 2 mm |
|
2.42 kg / 5.32 lbs
2415.0 g / 23.7 N
|
| 3 mm |
|
3.62 kg / 7.99 lbs
3622.5 g / 35.5 N
|
| 5 mm |
|
4.83 kg / 10.65 lbs
4830.0 g / 47.4 N
|
| 10 mm |
|
4.83 kg / 10.65 lbs
4830.0 g / 47.4 N
|
| 11 mm |
|
4.83 kg / 10.65 lbs
4830.0 g / 47.4 N
|
| 12 mm |
|
4.83 kg / 10.65 lbs
4830.0 g / 47.4 N
|
Table 5: Working in heat (material behavior) - power drop
MW 12x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
4.83 kg / 10.65 lbs
4830.0 g / 47.4 N
|
OK |
| 40 °C | -2.2% |
4.72 kg / 10.41 lbs
4723.7 g / 46.3 N
|
OK |
| 60 °C | -4.4% |
4.62 kg / 10.18 lbs
4617.5 g / 45.3 N
|
OK |
| 80 °C | -6.6% |
4.51 kg / 9.95 lbs
4511.2 g / 44.3 N
|
|
| 100 °C | -28.8% |
3.44 kg / 7.58 lbs
3439.0 g / 33.7 N
|
Table 6: Two magnets (repulsion) - forces in the system
MW 12x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
19.64 kg / 43.30 lbs
5 928 Gs
|
2.95 kg / 6.50 lbs
2946 g / 28.9 N
|
N/A |
| 1 mm |
16.52 kg / 36.43 lbs
9 736 Gs
|
2.48 kg / 5.46 lbs
2479 g / 24.3 N
|
14.87 kg / 32.79 lbs
~0 Gs
|
| 2 mm |
13.64 kg / 30.08 lbs
8 847 Gs
|
2.05 kg / 4.51 lbs
2047 g / 20.1 N
|
12.28 kg / 27.07 lbs
~0 Gs
|
| 3 mm |
11.12 kg / 24.51 lbs
7 986 Gs
|
1.67 kg / 3.68 lbs
1668 g / 16.4 N
|
10.01 kg / 22.06 lbs
~0 Gs
|
| 5 mm |
7.16 kg / 15.79 lbs
6 410 Gs
|
1.07 kg / 2.37 lbs
1074 g / 10.5 N
|
6.45 kg / 14.21 lbs
~0 Gs
|
| 10 mm |
2.23 kg / 4.91 lbs
3 575 Gs
|
0.33 kg / 0.74 lbs
334 g / 3.3 N
|
2.00 kg / 4.42 lbs
~0 Gs
|
| 20 mm |
0.27 kg / 0.59 lbs
1 244 Gs
|
0.04 kg / 0.09 lbs
40 g / 0.4 N
|
0.24 kg / 0.54 lbs
~0 Gs
|
| 50 mm |
0.00 kg / 0.01 lbs
164 Gs
|
0.00 kg / 0.00 lbs
1 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 lbs
104 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
70 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
49 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
36 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
27 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 12x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 7.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 6.0 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 4.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 3.5 cm |
| Remote | 50 Gs (5.0 mT) | 3.5 cm |
| Payment card | 400 Gs (40.0 mT) | 1.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.5 cm |
Table 8: Collisions (cracking risk) - collision effects
MW 12x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
18.58 km/h
(5.16 m/s)
|
0.11 J | |
| 30 mm |
18.75 km/h
(5.21 m/s)
|
0.11 J | |
| 50 mm |
18.75 km/h
(5.21 m/s)
|
0.12 J | |
| 100 mm |
18.75 km/h
(5.21 m/s)
|
0.12 J |
Table 9: Coating parameters (durability)
MW 12x10 / 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 12x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 6 105 Mx | 61.1 µWb |
| Pc Coefficient | 0.81 | High (Stable) |
Table 11: Underwater work (magnet fishing)
MW 12x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 4.83 kg | Standard |
| Water (riverbed) |
5.53 kg
(+0.70 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Note: On a vertical surface, the magnet retains only a fraction of its max power.
2. Steel saturation
*Thin metal sheet (e.g. computer case) drastically weakens the holding force.
3. Heat tolerance
*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) = 0.81
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.
Material specification
| 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 |
Other deals
Pros and cons of rare earth magnets.
Strengths
- They retain full power for nearly ten years – the drop is just ~1% (according to analyses),
- Neodymium magnets are distinguished by remarkably resistant to demagnetization caused by external field sources,
- Thanks to the shimmering finish, the layer of Ni-Cu-Ni, gold, or silver-plated gives an visually attractive appearance,
- Neodymium magnets generate maximum magnetic induction on a small area, which ensures high operational effectiveness,
- Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
- Thanks to freedom in forming and the capacity to customize to individual projects,
- Significant place in electronics industry – they find application in mass storage devices, electric drive systems, medical equipment, also technologically advanced constructions.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which makes them useful in compact constructions
Disadvantages
- They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
- Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. 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 recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
- Due to limitations in creating nuts and complex forms in magnets, we recommend using cover - magnetic mount.
- Health risk related to microscopic parts of magnets can be dangerous, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Furthermore, small elements of these magnets are able to disrupt the diagnostic process medical after entering the body.
- Due to expensive raw materials, their price is relatively high,
Lifting parameters
Breakaway strength of the magnet in ideal conditions – what affects it?
- using a sheet made of high-permeability steel, serving as a magnetic yoke
- whose thickness reaches at least 10 mm
- with an ground contact surface
- without any air gap between the magnet and steel
- for force acting at a right angle (pull-off, not shear)
- in temp. approx. 20°C
Impact of factors on magnetic holding capacity in practice
- Clearance – existence of any layer (rust, tape, air) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
- Pull-off angle – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
- Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of generating force.
- Steel grade – the best choice is high-permeability steel. Cast iron may generate lower lifting capacity.
- Surface finish – ideal contact is possible only on polished steel. Any scratches and bumps create air cushions, reducing force.
- Temperature influence – high temperature weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity was measured using a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, in contrast under parallel forces the load capacity is reduced by as much as 75%. Moreover, even a slight gap between the magnet and the plate decreases the load capacity.
H&S for magnets
Magnets are brittle
Despite the nickel coating, the material is brittle and cannot withstand shocks. Do not hit, as the magnet may crumble into hazardous fragments.
Operating temperature
Monitor thermal conditions. Heating the magnet to high heat will permanently weaken its properties and strength.
Skin irritation risks
Some people have a sensitization to nickel, which is the standard coating for NdFeB magnets. Frequent touching might lead to a rash. It is best to use protective gloves.
Powerful field
Use magnets with awareness. Their huge power can surprise even experienced users. Stay alert and respect their power.
Medical implants
Health Alert: Neodymium magnets can turn off pacemakers and defibrillators. Stay away if you have electronic implants.
Magnetic interference
Navigation devices and mobile phones are highly sensitive to magnetic fields. Close proximity with a strong magnet can ruin the sensors in your phone.
No play value
These products are not intended for children. Swallowing several magnets may result in them connecting inside the digestive tract, which constitutes a severe health hazard and necessitates urgent medical intervention.
Dust explosion hazard
Drilling and cutting of neodymium magnets carries a risk of fire risk. Neodymium dust reacts violently with oxygen and is hard to extinguish.
Serious injuries
Pinching hazard: The pulling power is so great that it can result in hematomas, pinching, and even bone fractures. Protective gloves are recommended.
Electronic hazard
Avoid bringing magnets close to a wallet, laptop, or TV. The magnetic field can permanently damage these devices and erase data from cards.
