MW 10x3 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010008
GTIN/EAN: 5906301810070
- Diameter Ø
- 10 mm [±0,1 mm]
- Height
- 3 mm [±0,1 mm]
- Weight
- 1.77 g
- Magnetization Direction
- ↑ axial
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
0.750 zł net / pcs
0.923 zł with VAT (23% VAT) / pcs
0.590 zł net was the lowest price in the last 30 days
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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Technical details - MW 10x3 / N38 - cylindrical magnet
Specification / characteristics - MW 10x3 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010008 |
| GTIN/EAN | 5906301810070 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 10 mm [±0,1 mm] |
| Height | 3 mm [±0,1 mm] |
| Weight | 1.77 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 2.15 kg / 21.08 N |
| Magnetic Induction ~ ? | 318.70 mT / 3187 Gs |
| Coating | [NiCuNi] Nickel |
| Manufacturing Tolerance | ±0.1 mm |
Magnetic properties of material N38
| properties | values | units |
|---|---|---|
| Remanence Br ? | 12.2-12.6 | kGs |
| Remanence Br ? | 1220-1260 | mT |
| Coercivity bHc ? | 10.8-11.5 | kOe |
| Coercivity bHc ? | 860-915 | kA/m |
| Intrinsic coercivity iHc | ≥ 12 | kOe |
| Intrinsic coercivity iHc | ≥ 955 | kA/m |
| Energy product BHmax ? | 36-38 | BH max MGOe |
| Energy product BHmax ? | 287-303 | BH max KJ/m |
| Maximum working 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 product - technical parameters
The following information represent the result of a mathematical calculation. Results are based on algorithms for the material Nd2Fe14B. Operational performance may deviate from the simulation results. Please consider these calculations as a reference point for designers.
Table 1: Static pull force (pull vs distance) - interaction chart
MW 10x3 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3185 Gs
318.5 mT
|
2.15 kg / 4.74 lbs
2150.0 g / 21.1 N
|
strong |
| 1 mm |
2657 Gs
265.7 mT
|
1.50 kg / 3.30 lbs
1496.2 g / 14.7 N
|
weak grip |
| 2 mm |
2081 Gs
208.1 mT
|
0.92 kg / 2.02 lbs
918.1 g / 9.0 N
|
weak grip |
| 3 mm |
1573 Gs
157.3 mT
|
0.52 kg / 1.16 lbs
524.4 g / 5.1 N
|
weak grip |
| 5 mm |
874 Gs
87.4 mT
|
0.16 kg / 0.36 lbs
161.7 g / 1.6 N
|
weak grip |
| 10 mm |
241 Gs
24.1 mT
|
0.01 kg / 0.03 lbs
12.3 g / 0.1 N
|
weak grip |
| 15 mm |
92 Gs
9.2 mT
|
0.00 kg / 0.00 lbs
1.8 g / 0.0 N
|
weak grip |
| 20 mm |
44 Gs
4.4 mT
|
0.00 kg / 0.00 lbs
0.4 g / 0.0 N
|
weak grip |
| 30 mm |
14 Gs
1.4 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
weak grip |
| 50 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
weak grip |
Table 2: Slippage load (vertical surface)
MW 10x3 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.43 kg / 0.95 lbs
430.0 g / 4.2 N
|
| 1 mm | Stal (~0.2) |
0.30 kg / 0.66 lbs
300.0 g / 2.9 N
|
| 2 mm | Stal (~0.2) |
0.18 kg / 0.41 lbs
184.0 g / 1.8 N
|
| 3 mm | Stal (~0.2) |
0.10 kg / 0.23 lbs
104.0 g / 1.0 N
|
| 5 mm | Stal (~0.2) |
0.03 kg / 0.07 lbs
32.0 g / 0.3 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: Wall mounting (shearing) - behavior on slippery surfaces
MW 10x3 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.64 kg / 1.42 lbs
645.0 g / 6.3 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.43 kg / 0.95 lbs
430.0 g / 4.2 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.22 kg / 0.47 lbs
215.0 g / 2.1 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.08 kg / 2.37 lbs
1075.0 g / 10.5 N
|
Table 4: Steel thickness (saturation) - power losses
MW 10x3 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.22 kg / 0.47 lbs
215.0 g / 2.1 N
|
| 1 mm |
|
0.54 kg / 1.18 lbs
537.5 g / 5.3 N
|
| 2 mm |
|
1.08 kg / 2.37 lbs
1075.0 g / 10.5 N
|
| 3 mm |
|
1.61 kg / 3.55 lbs
1612.5 g / 15.8 N
|
| 5 mm |
|
2.15 kg / 4.74 lbs
2150.0 g / 21.1 N
|
| 10 mm |
|
2.15 kg / 4.74 lbs
2150.0 g / 21.1 N
|
| 11 mm |
|
2.15 kg / 4.74 lbs
2150.0 g / 21.1 N
|
| 12 mm |
|
2.15 kg / 4.74 lbs
2150.0 g / 21.1 N
|
Table 5: Thermal resistance (stability) - power drop
MW 10x3 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
2.15 kg / 4.74 lbs
2150.0 g / 21.1 N
|
OK |
| 40 °C | -2.2% |
2.10 kg / 4.64 lbs
2102.7 g / 20.6 N
|
OK |
| 60 °C | -4.4% |
2.06 kg / 4.53 lbs
2055.4 g / 20.2 N
|
|
| 80 °C | -6.6% |
2.01 kg / 4.43 lbs
2008.1 g / 19.7 N
|
|
| 100 °C | -28.8% |
1.53 kg / 3.37 lbs
1530.8 g / 15.0 N
|
Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 10x3 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
4.91 kg / 10.83 lbs
4 754 Gs
|
0.74 kg / 1.62 lbs
737 g / 7.2 N
|
N/A |
| 1 mm |
4.18 kg / 9.22 lbs
5 877 Gs
|
0.63 kg / 1.38 lbs
627 g / 6.2 N
|
3.76 kg / 8.30 lbs
~0 Gs
|
| 2 mm |
3.42 kg / 7.54 lbs
5 314 Gs
|
0.51 kg / 1.13 lbs
513 g / 5.0 N
|
3.08 kg / 6.78 lbs
~0 Gs
|
| 3 mm |
2.71 kg / 5.98 lbs
4 732 Gs
|
0.41 kg / 0.90 lbs
407 g / 4.0 N
|
2.44 kg / 5.38 lbs
~0 Gs
|
| 5 mm |
1.59 kg / 3.52 lbs
3 630 Gs
|
0.24 kg / 0.53 lbs
239 g / 2.3 N
|
1.44 kg / 3.16 lbs
~0 Gs
|
| 10 mm |
0.37 kg / 0.81 lbs
1 747 Gs
|
0.06 kg / 0.12 lbs
55 g / 0.5 N
|
0.33 kg / 0.73 lbs
~0 Gs
|
| 20 mm |
0.03 kg / 0.06 lbs
483 Gs
|
0.00 kg / 0.01 lbs
4 g / 0.0 N
|
0.03 kg / 0.06 lbs
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 lbs
48 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
29 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
19 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
13 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
9 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
7 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) - warnings
MW 10x3 / 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) | 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: Collisions (cracking risk) - collision effects
MW 10x3 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
25.76 km/h
(7.16 m/s)
|
0.05 J | |
| 30 mm |
25.85 km/h
(7.18 m/s)
|
0.05 J | |
| 50 mm |
25.85 km/h
(7.18 m/s)
|
0.05 J | |
| 100 mm |
25.85 km/h
(7.18 m/s)
|
0.05 J |
Table 9: Coating parameters (durability)
MW 10x3 / 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 10x3 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 2 694 Mx | 26.9 µWb |
| Pc Coefficient | 0.40 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
MW 10x3 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 2.15 kg | Standard |
| Water (riverbed) |
2.46 kg
(+0.31 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Caution: On a vertical wall, the magnet holds merely a fraction of its perpendicular strength.
2. Steel thickness impact
*Thin metal sheet (e.g. computer case) significantly limits the holding force.
3. Temperature resistance
*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) = 0.40
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
Strengths as well as weaknesses of neodymium magnets.
Benefits
- They do not lose strength, even over approximately ten years – the drop in lifting capacity is only ~1% (based on measurements),
- They maintain their magnetic properties even under strong external field,
- A magnet with a shiny silver surface looks better,
- Magnets have exceptionally strong magnetic induction on the outer side,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
- Thanks to flexibility in shaping and the capacity to adapt to complex applications,
- Huge importance in advanced technology sectors – they are utilized in magnetic memories, brushless drives, medical equipment, as well as industrial machines.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Weaknesses
- To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
- NdFeB magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (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 very resistant to heat
- Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
- Due to limitations in creating nuts and complex forms in magnets, we propose using cover - magnetic mount.
- Potential hazard to health – tiny shards of magnets pose a threat, in case of ingestion, which gains importance in the aspect of protecting the youngest. Additionally, small components of these products can complicate diagnosis medical after entering the body.
- Due to neodymium price, their price exceeds standard values,
Holding force characteristics
Maximum lifting force for a neodymium magnet – what contributes to it?
- with the contact of a yoke made of low-carbon steel, guaranteeing maximum field concentration
- with a cross-section no less than 10 mm
- characterized by even structure
- under conditions of gap-free contact (surface-to-surface)
- under vertical application of breakaway force (90-degree angle)
- at temperature approx. 20 degrees Celsius
Practical aspects of lifting capacity – factors
- Distance – existence of any layer (paint, tape, air) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
- Force direction – declared lifting capacity refers to detachment vertically. When slipping, the magnet exhibits much less (often approx. 20-30% of maximum force).
- Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the attraction force (the magnet "punches through" it).
- Metal type – not every steel reacts the same. Alloy additives worsen the interaction with the magnet.
- Surface condition – ground elements ensure maximum contact, which increases force. Uneven metal reduce efficiency.
- Heat – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).
Lifting capacity was determined with the use of a smooth steel plate of optimal thickness (min. 20 mm), under vertically applied force, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate reduces the load capacity.
Precautions when working with NdFeB magnets
Magnetic interference
Be aware: rare earth magnets generate a field that disrupts precision electronics. Maintain a separation from your mobile, tablet, and GPS.
Do not drill into magnets
Fire hazard: Rare earth powder is highly flammable. Do not process magnets without safety gear as this may cause fire.
Physical harm
Watch your fingers. Two powerful magnets will snap together immediately with a force of several hundred kilograms, crushing anything in their path. Be careful!
Power loss in heat
Control the heat. Heating the magnet above 80 degrees Celsius will destroy its magnetic structure and pulling force.
Medical implants
Patients with a heart stimulator must keep an large gap from magnets. The magnetic field can interfere with the functioning of the life-saving device.
Respect the power
Be careful. Neodymium magnets attract from a long distance and connect with massive power, often faster than you can react.
Magnetic media
Avoid bringing magnets close to a wallet, computer, or TV. The magnetism can destroy these devices and erase data from cards.
Avoid contact if allergic
Studies show that the nickel plating (standard magnet coating) is a potent allergen. If you have an allergy, refrain from direct skin contact and choose coated magnets.
Magnets are brittle
NdFeB magnets are ceramic materials, meaning they are prone to chipping. Impact of two magnets leads to them shattering into small pieces.
No play value
Always store magnets out of reach of children. Risk of swallowing is significant, and the consequences of magnets connecting inside the body are life-threatening.
