MW 10x8 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010013
GTIN/EAN: 5906301810124
- Diameter Ø
- 10 mm [±0,1 mm]
- Height
- 8 mm [±0,1 mm]
- Weight
- 4.71 g
- Magnetization Direction
- ↑ axial
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
1.770 zł net / pcs
2.18 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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Technical details - MW 10x8 / N38 - cylindrical magnet
Specification / characteristics - MW 10x8 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010013 |
| GTIN/EAN | 5906301810124 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 10 mm [±0,1 mm] |
| Height | 8 mm [±0,1 mm] |
| Weight | 4.71 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 3.38 kg / 33.16 N |
| Magnetic Induction ~ ? | 525.10 mT / 5251 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 |
Engineering simulation of the assembly - report
These values constitute the outcome of a mathematical simulation. Results rely on algorithms for the material Nd2Fe14B. Operational parameters may differ from theoretical values. Use these calculations as a preliminary roadmap during assembly planning.
Table 1: Static pull force (pull vs distance) - interaction chart
MW 10x8 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
5247 Gs
524.7 mT
|
3.38 kg / 7.45 pounds
3380.0 g / 33.2 N
|
warning |
| 1 mm |
4204 Gs
420.4 mT
|
2.17 kg / 4.78 pounds
2169.6 g / 21.3 N
|
warning |
| 2 mm |
3243 Gs
324.3 mT
|
1.29 kg / 2.85 pounds
1291.0 g / 12.7 N
|
safe |
| 3 mm |
2454 Gs
245.4 mT
|
0.74 kg / 1.63 pounds
739.6 g / 7.3 N
|
safe |
| 5 mm |
1403 Gs
140.3 mT
|
0.24 kg / 0.53 pounds
241.5 g / 2.4 N
|
safe |
| 10 mm |
428 Gs
42.8 mT
|
0.02 kg / 0.05 pounds
22.5 g / 0.2 N
|
safe |
| 15 mm |
177 Gs
17.7 mT
|
0.00 kg / 0.01 pounds
3.8 g / 0.0 N
|
safe |
| 20 mm |
89 Gs
8.9 mT
|
0.00 kg / 0.00 pounds
1.0 g / 0.0 N
|
safe |
| 30 mm |
31 Gs
3.1 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
safe |
| 50 mm |
8 Gs
0.8 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
Table 2: Shear force (vertical surface)
MW 10x8 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.68 kg / 1.49 pounds
676.0 g / 6.6 N
|
| 1 mm | Stal (~0.2) |
0.43 kg / 0.96 pounds
434.0 g / 4.3 N
|
| 2 mm | Stal (~0.2) |
0.26 kg / 0.57 pounds
258.0 g / 2.5 N
|
| 3 mm | Stal (~0.2) |
0.15 kg / 0.33 pounds
148.0 g / 1.5 N
|
| 5 mm | Stal (~0.2) |
0.05 kg / 0.11 pounds
48.0 g / 0.5 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: Wall mounting (shearing) - behavior on slippery surfaces
MW 10x8 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
1.01 kg / 2.24 pounds
1014.0 g / 9.9 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.68 kg / 1.49 pounds
676.0 g / 6.6 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.34 kg / 0.75 pounds
338.0 g / 3.3 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.69 kg / 3.73 pounds
1690.0 g / 16.6 N
|
Table 4: Material efficiency (saturation) - power losses
MW 10x8 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.34 kg / 0.75 pounds
338.0 g / 3.3 N
|
| 1 mm |
|
0.85 kg / 1.86 pounds
845.0 g / 8.3 N
|
| 2 mm |
|
1.69 kg / 3.73 pounds
1690.0 g / 16.6 N
|
| 3 mm |
|
2.54 kg / 5.59 pounds
2535.0 g / 24.9 N
|
| 5 mm |
|
3.38 kg / 7.45 pounds
3380.0 g / 33.2 N
|
| 10 mm |
|
3.38 kg / 7.45 pounds
3380.0 g / 33.2 N
|
| 11 mm |
|
3.38 kg / 7.45 pounds
3380.0 g / 33.2 N
|
| 12 mm |
|
3.38 kg / 7.45 pounds
3380.0 g / 33.2 N
|
Table 5: Thermal stability (material behavior) - power drop
MW 10x8 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
3.38 kg / 7.45 pounds
3380.0 g / 33.2 N
|
OK |
| 40 °C | -2.2% |
3.31 kg / 7.29 pounds
3305.6 g / 32.4 N
|
OK |
| 60 °C | -4.4% |
3.23 kg / 7.12 pounds
3231.3 g / 31.7 N
|
OK |
| 80 °C | -6.6% |
3.16 kg / 6.96 pounds
3156.9 g / 31.0 N
|
|
| 100 °C | -28.8% |
2.41 kg / 5.31 pounds
2406.6 g / 23.6 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 10x8 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
13.33 kg / 29.39 pounds
5 906 Gs
|
2.00 kg / 4.41 pounds
2000 g / 19.6 N
|
N/A |
| 1 mm |
10.82 kg / 23.85 pounds
9 454 Gs
|
1.62 kg / 3.58 pounds
1623 g / 15.9 N
|
9.74 kg / 21.47 pounds
~0 Gs
|
| 2 mm |
8.56 kg / 18.86 pounds
8 408 Gs
|
1.28 kg / 2.83 pounds
1284 g / 12.6 N
|
7.70 kg / 16.98 pounds
~0 Gs
|
| 3 mm |
6.65 kg / 14.65 pounds
7 410 Gs
|
1.00 kg / 2.20 pounds
997 g / 9.8 N
|
5.98 kg / 13.19 pounds
~0 Gs
|
| 5 mm |
3.86 kg / 8.52 pounds
5 650 Gs
|
0.58 kg / 1.28 pounds
580 g / 5.7 N
|
3.48 kg / 7.67 pounds
~0 Gs
|
| 10 mm |
0.95 kg / 2.10 pounds
2 805 Gs
|
0.14 kg / 0.32 pounds
143 g / 1.4 N
|
0.86 kg / 1.89 pounds
~0 Gs
|
| 20 mm |
0.09 kg / 0.20 pounds
857 Gs
|
0.01 kg / 0.03 pounds
13 g / 0.1 N
|
0.08 kg / 0.18 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
101 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
63 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
42 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
29 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
21 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
16 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Safety (HSE) (implants) - precautionary measures
MW 10x8 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 6.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 5.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 4.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 3.0 cm |
| Car key | 50 Gs (5.0 mT) | 3.0 cm |
| Payment card | 400 Gs (40.0 mT) | 1.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Dynamics (cracking risk) - warning
MW 10x8 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
19.12 km/h
(5.31 m/s)
|
0.07 J | |
| 30 mm |
19.21 km/h
(5.34 m/s)
|
0.07 J | |
| 50 mm |
19.21 km/h
(5.34 m/s)
|
0.07 J | |
| 100 mm |
19.21 km/h
(5.34 m/s)
|
0.07 J |
Table 9: Corrosion resistance
MW 10x8 / 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 10x8 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 4 183 Mx | 41.8 µWb |
| Pc Coefficient | 0.79 | High (Stable) |
Table 11: Hydrostatics and buoyancy
MW 10x8 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 3.38 kg | Standard |
| Water (riverbed) |
3.87 kg
(+0.49 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Note: On a vertical wall, the magnet retains just a fraction of its max power.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) drastically weakens 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) = 0.79
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.
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other proposals
Pros as well as cons of rare earth magnets.
Benefits
- They do not lose magnetism, even after around ten years – the drop in power is only ~1% (according to tests),
- Magnets perfectly resist against loss of magnetization caused by ambient magnetic noise,
- In other words, due to the aesthetic layer of silver, the element looks attractive,
- Neodymium magnets create maximum magnetic induction on a their surface, which allows for strong attraction,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Thanks to freedom in constructing and the ability to modify to client solutions,
- Wide application in innovative solutions – they are utilized in computer drives, drive modules, diagnostic systems, as well as other advanced devices.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Cons
- At strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
- Limited ability of producing nuts in the magnet and complicated forms - recommended is casing - magnetic holder.
- Possible danger resulting from small fragments of magnets are risky, when accidentally swallowed, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these devices can complicate diagnosis medical after entering the body.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities
Lifting parameters
Maximum lifting capacity of the magnet – what contributes to it?
- on a block made of structural steel, effectively closing the magnetic field
- possessing a thickness of minimum 10 mm to ensure full flux closure
- characterized by even structure
- with total lack of distance (no impurities)
- for force acting at a right angle (pull-off, not shear)
- at room temperature
Lifting capacity in real conditions – factors
- Distance – existence of any layer (paint, dirt, gap) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
- Load vector – highest force is available only during perpendicular pulling. The shear force of the magnet along the surface is standardly many times lower (approx. 1/5 of the lifting capacity).
- Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
- Metal type – not every steel reacts the same. Alloy additives weaken the attraction effect.
- Surface finish – full contact is possible only on smooth steel. Rough texture create air cushions, weakening the magnet.
- Temperature – heating the magnet causes a temporary drop of force. Check the maximum operating temperature for a given model.
Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under attempts to slide the magnet the holding force is lower. Additionally, even a slight gap between the magnet’s surface and the plate reduces the holding force.
H&S for magnets
Respect the power
Before starting, read the rules. Uncontrolled attraction can break the magnet or injure your hand. Be predictive.
Power loss in heat
Keep cool. NdFeB magnets are susceptible to temperature. If you require operation above 80°C, ask us about HT versions (H, SH, UH).
Avoid contact if allergic
Certain individuals suffer from a contact allergy to nickel, which is the common plating for NdFeB magnets. Frequent touching may cause a rash. We suggest wear protective gloves.
ICD Warning
Patients with a ICD should keep an safe separation from magnets. The magnetic field can stop the operation of the implant.
Impact on smartphones
Remember: rare earth magnets generate a field that interferes with precision electronics. Keep a separation from your mobile, device, and navigation systems.
Fire risk
Combustion risk: Neodymium dust is explosive. Do not process magnets in home conditions as this may cause fire.
Crushing risk
Danger of trauma: The attraction force is so immense that it can cause hematomas, pinching, and broken bones. Use thick gloves.
Protect data
Very strong magnetic fields can corrupt files on credit cards, hard drives, and storage devices. Maintain a gap of at least 10 cm.
Keep away from children
Neodymium magnets are not suitable for play. Eating several magnets can lead to them attracting across intestines, which poses a direct threat to life and necessitates immediate surgery.
Beware of splinters
Watch out for shards. Magnets can explode upon violent connection, launching shards into the air. Wear goggles.
