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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Technical specification of the product - 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 |
Technical simulation of the product - report
The following values constitute the result of a engineering analysis. Results are based on algorithms for the material Nd2Fe14B. Operational parameters may deviate from the simulation results. Use these data as a supplementary guide during assembly planning.
Table 1: Static force (pull 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
|
weak grip |
| 1 mm |
941 Gs
94.1 mT
|
0.36 kg / 0.79 lbs
358.5 g / 3.5 N
|
weak grip |
| 2 mm |
812 Gs
81.2 mT
|
0.27 kg / 0.59 lbs
266.8 g / 2.6 N
|
weak grip |
| 3 mm |
666 Gs
66.6 mT
|
0.18 kg / 0.40 lbs
179.7 g / 1.8 N
|
weak grip |
| 5 mm |
415 Gs
41.5 mT
|
0.07 kg / 0.15 lbs
69.7 g / 0.7 N
|
weak grip |
| 10 mm |
126 Gs
12.6 mT
|
0.01 kg / 0.01 lbs
6.5 g / 0.1 N
|
weak grip |
| 15 mm |
49 Gs
4.9 mT
|
0.00 kg / 0.00 lbs
1.0 g / 0.0 N
|
weak grip |
| 20 mm |
23 Gs
2.3 mT
|
0.00 kg / 0.00 lbs
0.2 g / 0.0 N
|
weak grip |
| 30 mm |
7 Gs
0.7 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
weak grip |
| 50 mm |
2 Gs
0.2 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
weak grip |
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) - behavior on slippery surfaces
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: Material efficiency (saturation) - sheet metal selection
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: Working in heat (material behavior) - power drop
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: Two magnets (repulsion) - 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) - precautionary measures
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 |
| Timepiece | 20 Gs (2.0 mT) | 2.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 2.0 cm |
| Car key | 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: Dynamics (cracking risk) - collision effects
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: Construction data (Pc)
MW 12x1 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 1 564 Mx | 15.6 µWb |
| Pc Coefficient | 0.13 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
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. Sliding resistance
*Caution: On a vertical surface, the magnet holds merely ~20% of its perpendicular strength.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) severely reduces 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) = 0.13
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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other proposals
Strengths as well as weaknesses of rare earth magnets.
Advantages
- Their magnetic field is maintained, and after approximately ten years it decreases only by ~1% (theoretically),
- Magnets effectively protect themselves against loss of magnetization caused by ambient magnetic noise,
- By covering with a lustrous coating of nickel, the element gains an modern look,
- Magnets are distinguished by excellent magnetic induction on the surface,
- Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
- Thanks to flexibility in forming and the capacity to modify to complex applications,
- Significant place in modern industrial fields – they serve a role in computer drives, brushless drives, medical devices, as well as industrial machines.
- Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,
Cons
- To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
- Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as 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
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
- Limited possibility of creating nuts in the magnet and complicated forms - recommended is casing - mounting mechanism.
- Potential hazard to health – tiny shards of magnets are risky, in case of ingestion, which gains importance in the aspect of protecting the youngest. Furthermore, small elements of these products can complicate diagnosis medical after entering the body.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Lifting parameters
Best holding force of the magnet in ideal parameters – what affects it?
- using a base made of mild steel, acting as a ideal flux conductor
- with a thickness no less than 10 mm
- with an ground touching surface
- without the slightest insulating layer between the magnet and steel
- under perpendicular force direction (90-degree angle)
- at ambient temperature approx. 20 degrees Celsius
Impact of factors on magnetic holding capacity in practice
- Distance (between the magnet and the plate), because even a very small distance (e.g. 0.5 mm) leads to a drastic drop in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
- Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the maximum value.
- Steel thickness – insufficiently thick steel causes magnetic saturation, causing part of the flux to be escaped into the air.
- Steel type – low-carbon steel attracts best. Alloy steels lower magnetic properties and holding force.
- Smoothness – ideal contact is obtained only on smooth steel. Any scratches and bumps create air cushions, weakening the magnet.
- Thermal factor – high temperature weakens pulling force. Too high temperature can permanently demagnetize the magnet.
Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, however under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate decreases the lifting capacity.
H&S for magnets
Precision electronics
Navigation devices and smartphones are extremely sensitive to magnetic fields. Close proximity with a strong magnet can permanently damage the internal compass in your phone.
Do not drill into magnets
Fire hazard: Rare earth powder is highly flammable. Do not process magnets in home conditions as this may cause fire.
Medical interference
Medical warning: Strong magnets can deactivate pacemakers and defibrillators. Do not approach if you have medical devices.
Demagnetization risk
Standard neodymium magnets (grade N) lose magnetization when the temperature exceeds 80°C. The loss of strength is permanent.
Finger safety
Mind your fingers. Two large magnets will join immediately with a force of several hundred kilograms, crushing anything in their path. Exercise extreme caution!
Shattering risk
Beware of splinters. Magnets can fracture upon uncontrolled impact, launching shards into the air. We recommend safety glasses.
Warning for allergy sufferers
Studies show that the nickel plating (standard magnet coating) is a potent allergen. If you have an allergy, refrain from direct skin contact and select versions in plastic housing.
This is not a toy
Neodymium magnets are not intended for children. Eating a few magnets can lead to them connecting inside the digestive tract, which poses a direct threat to life and necessitates immediate surgery.
Handling guide
Be careful. Neodymium magnets act from a distance and snap with huge force, often faster than you can move away.
Data carriers
Device Safety: Neodymium magnets can damage payment cards and delicate electronics (heart implants, medical aids, timepieces).
