MW 9x3 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010108
GTIN/EAN: 5906301811077
Diameter Ø
9 mm [±0,1 mm]
Height
3 mm [±0,1 mm]
Weight
1.43 g
Magnetization Direction
↑ axial
Load capacity
1.94 kg / 18.99 N
Magnetic Induction
343.55 mT / 3436 Gs
Coating
[NiCuNi] Nickel
1.132 ZŁ with VAT / pcs + price for transport
0.920 ZŁ net + 23% VAT / pcs
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Detailed specification - MW 9x3 / N38 - cylindrical magnet
Specification / characteristics - MW 9x3 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010108 |
| GTIN/EAN | 5906301811077 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 9 mm [±0,1 mm] |
| Height | 3 mm [±0,1 mm] |
| Weight | 1.43 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 1.94 kg / 18.99 N |
| Magnetic Induction ~ ? | 343.55 mT / 3436 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 |
Engineering simulation of the product - data
These information constitute the outcome of a engineering analysis. Results rely on models for the class Nd2Fe14B. Operational performance might slightly differ from theoretical values. Treat these data as a preliminary roadmap when designing systems.
Table 1: Static pull force (force vs distance) - interaction chart
MW 9x3 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3433 Gs
343.3 mT
|
1.94 kg / 4.28 pounds
1940.0 g / 19.0 N
|
weak grip |
| 1 mm |
2774 Gs
277.4 mT
|
1.27 kg / 2.79 pounds
1266.5 g / 12.4 N
|
weak grip |
| 2 mm |
2090 Gs
209.0 mT
|
0.72 kg / 1.59 pounds
719.2 g / 7.1 N
|
weak grip |
| 3 mm |
1521 Gs
152.1 mT
|
0.38 kg / 0.84 pounds
380.7 g / 3.7 N
|
weak grip |
| 5 mm |
795 Gs
79.5 mT
|
0.10 kg / 0.23 pounds
104.1 g / 1.0 N
|
weak grip |
| 10 mm |
205 Gs
20.5 mT
|
0.01 kg / 0.02 pounds
6.9 g / 0.1 N
|
weak grip |
| 15 mm |
76 Gs
7.6 mT
|
0.00 kg / 0.00 pounds
1.0 g / 0.0 N
|
weak grip |
| 20 mm |
36 Gs
3.6 mT
|
0.00 kg / 0.00 pounds
0.2 g / 0.0 N
|
weak grip |
| 30 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
| 50 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
Table 2: Slippage capacity (vertical surface)
MW 9x3 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.39 kg / 0.86 pounds
388.0 g / 3.8 N
|
| 1 mm | Stal (~0.2) |
0.25 kg / 0.56 pounds
254.0 g / 2.5 N
|
| 2 mm | Stal (~0.2) |
0.14 kg / 0.32 pounds
144.0 g / 1.4 N
|
| 3 mm | Stal (~0.2) |
0.08 kg / 0.17 pounds
76.0 g / 0.7 N
|
| 5 mm | Stal (~0.2) |
0.02 kg / 0.04 pounds
20.0 g / 0.2 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
2.0 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) - vertical pull
MW 9x3 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.58 kg / 1.28 pounds
582.0 g / 5.7 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.39 kg / 0.86 pounds
388.0 g / 3.8 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.19 kg / 0.43 pounds
194.0 g / 1.9 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.97 kg / 2.14 pounds
970.0 g / 9.5 N
|
Table 4: Steel thickness (substrate influence) - power losses
MW 9x3 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.19 kg / 0.43 pounds
194.0 g / 1.9 N
|
| 1 mm |
|
0.49 kg / 1.07 pounds
485.0 g / 4.8 N
|
| 2 mm |
|
0.97 kg / 2.14 pounds
970.0 g / 9.5 N
|
| 3 mm |
|
1.46 kg / 3.21 pounds
1455.0 g / 14.3 N
|
| 5 mm |
|
1.94 kg / 4.28 pounds
1940.0 g / 19.0 N
|
| 10 mm |
|
1.94 kg / 4.28 pounds
1940.0 g / 19.0 N
|
| 11 mm |
|
1.94 kg / 4.28 pounds
1940.0 g / 19.0 N
|
| 12 mm |
|
1.94 kg / 4.28 pounds
1940.0 g / 19.0 N
|
Table 5: Thermal stability (material behavior) - thermal limit
MW 9x3 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
1.94 kg / 4.28 pounds
1940.0 g / 19.0 N
|
OK |
| 40 °C | -2.2% |
1.90 kg / 4.18 pounds
1897.3 g / 18.6 N
|
OK |
| 60 °C | -4.4% |
1.85 kg / 4.09 pounds
1854.6 g / 18.2 N
|
|
| 80 °C | -6.6% |
1.81 kg / 3.99 pounds
1812.0 g / 17.8 N
|
|
| 100 °C | -28.8% |
1.38 kg / 3.05 pounds
1381.3 g / 13.6 N
|
Table 6: Two magnets (attraction) - field range
MW 9x3 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
4.62 kg / 10.19 pounds
4 949 Gs
|
0.69 kg / 1.53 pounds
693 g / 6.8 N
|
N/A |
| 1 mm |
3.82 kg / 8.43 pounds
6 244 Gs
|
0.57 kg / 1.26 pounds
573 g / 5.6 N
|
3.44 kg / 7.58 pounds
~0 Gs
|
| 2 mm |
3.02 kg / 6.65 pounds
5 548 Gs
|
0.45 kg / 1.00 pounds
453 g / 4.4 N
|
2.72 kg / 5.99 pounds
~0 Gs
|
| 3 mm |
2.30 kg / 5.08 pounds
4 847 Gs
|
0.35 kg / 0.76 pounds
346 g / 3.4 N
|
2.07 kg / 4.57 pounds
~0 Gs
|
| 5 mm |
1.25 kg / 2.76 pounds
3 575 Gs
|
0.19 kg / 0.41 pounds
188 g / 1.8 N
|
1.13 kg / 2.49 pounds
~0 Gs
|
| 10 mm |
0.25 kg / 0.55 pounds
1 591 Gs
|
0.04 kg / 0.08 pounds
37 g / 0.4 N
|
0.22 kg / 0.49 pounds
~0 Gs
|
| 20 mm |
0.02 kg / 0.04 pounds
410 Gs
|
0.00 kg / 0.01 pounds
2 g / 0.0 N
|
0.01 kg / 0.03 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
39 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
23 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
15 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
10 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
7 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
5 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Protective zones (implants) - precautionary measures
MW 9x3 / 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 |
| Timepiece | 20 Gs (2.0 mT) | 2.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 2.0 cm |
| Car key | 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: Collisions (cracking risk) - warning
MW 9x3 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
37.23 km/h
(10.34 m/s)
|
0.08 J | |
| 30 mm |
64.34 km/h
(17.87 m/s)
|
0.23 J | |
| 50 mm |
83.06 km/h
(23.07 m/s)
|
0.38 J | |
| 100 mm |
117.47 km/h
(32.63 m/s)
|
0.76 J |
Table 9: Corrosion resistance
MW 9x3 / 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 9x3 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 2 314 Mx | 23.1 µWb |
| Pc Coefficient | 0.44 | Low (Flat) |
Table 11: Submerged application
MW 9x3 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 1.94 kg | Standard |
| Water (riverbed) |
2.22 kg
(+0.28 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Warning: On a vertical wall, the magnet retains just approx. 20-30% of its max power.
2. Efficiency vs thickness
*Thin metal sheet (e.g. 0.5mm PC case) drastically reduces the holding force.
3. Thermal stability
*For N38 grade, the critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.44
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 |
View also deals
Strengths and weaknesses of neodymium magnets.
Benefits
- Their strength remains stable, and after approximately 10 years it drops only by ~1% (according to research),
- They feature excellent resistance to magnetism drop due to opposing magnetic fields,
- The use of an refined coating of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
- The surface of neodymium magnets generates a concentrated magnetic field – this is one of their assets,
- Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
- Considering the potential of accurate forming and customization to custom requirements, magnetic components can be produced in a wide range of geometric configurations, which expands the range of possible applications,
- Wide application in modern industrial fields – they find application in magnetic memories, motor assemblies, medical devices, also other advanced devices.
- Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,
Cons
- Brittleness is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a strong case, which not only secures them against impacts but also raises their durability
- Neodymium magnets decrease 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, in case of application outdoors
- Due to limitations in producing nuts and complicated forms in magnets, we propose using casing - magnetic holder.
- Possible danger related to microscopic parts of magnets are risky, if swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that tiny parts of these devices can complicate diagnosis medical when they are in the body.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities
Lifting parameters
Maximum lifting force for a neodymium magnet – what affects it?
- on a plate made of structural steel, effectively closing the magnetic flux
- whose thickness equals approx. 10 mm
- characterized by smoothness
- under conditions of gap-free contact (surface-to-surface)
- under perpendicular application of breakaway force (90-degree angle)
- at ambient temperature room level
Key elements affecting lifting force
- Distance (between the magnet and the plate), as even a microscopic clearance (e.g. 0.5 mm) leads to a decrease in force by up to 50% (this also applies to paint, rust or debris).
- Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the nominal value.
- Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
- Metal type – different alloys attracts identically. High carbon content worsen the attraction effect.
- Plate texture – smooth surfaces guarantee perfect abutment, which increases force. Rough surfaces weaken the grip.
- Operating temperature – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and at low temperatures gain strength (up to a certain limit).
Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under perpendicular forces, however under shearing force the holding force is lower. In addition, even a small distance between the magnet and the plate decreases the load capacity.
Safety rules for work with neodymium magnets
GPS Danger
A strong magnetic field disrupts the operation of compasses in smartphones and navigation systems. Do not bring magnets near a smartphone to prevent breaking the sensors.
Adults only
Product intended for adults. Small elements pose a choking risk, causing severe trauma. Keep away from children and animals.
Bodily injuries
Large magnets can smash fingers instantly. Under no circumstances put your hand between two attracting surfaces.
Electronic hazard
Powerful magnetic fields can erase data on credit cards, HDDs, and storage devices. Keep a distance of at least 10 cm.
Warning for heart patients
Medical warning: Strong magnets can turn off pacemakers and defibrillators. Stay away if you have electronic implants.
Combustion hazard
Drilling and cutting of NdFeB material poses a fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.
Avoid contact if allergic
Nickel alert: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction occurs, cease handling magnets and use protective gear.
Handling guide
Before use, check safety instructions. Sudden snapping can break the magnet or injure your hand. Think ahead.
Do not overheat magnets
Keep cool. NdFeB magnets are susceptible to temperature. If you require resistance above 80°C, inquire about HT versions (H, SH, UH).
Shattering risk
Protect your eyes. Magnets can fracture upon uncontrolled impact, launching shards into the air. We recommend safety glasses.
