MW 10x20 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010007
GTIN/EAN: 5906301810063
Diameter Ø
10 mm [±0,1 mm]
Height
20 mm [±0,1 mm]
Weight
11.78 g
Magnetization Direction
↑ axial
Load capacity
2.23 kg / 21.88 N
Magnetic Induction
600.73 mT / 6007 Gs
Coating
[NiCuNi] Nickel
4.92 ZŁ with VAT / pcs + price for transport
4.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Physical properties - MW 10x20 / N38 - cylindrical magnet
Specification / characteristics - MW 10x20 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010007 |
| GTIN/EAN | 5906301810063 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 10 mm [±0,1 mm] |
| Height | 20 mm [±0,1 mm] |
| Weight | 11.78 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 2.23 kg / 21.88 N |
| Magnetic Induction ~ ? | 600.73 mT / 6007 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 |
Physical simulation of the product - report
The following information are the outcome of a engineering simulation. Results are based on algorithms for the class Nd2Fe14B. Actual conditions may deviate from the simulation results. Use these calculations as a reference point during assembly planning.
Table 1: Static force (force vs distance) - characteristics
MW 10x20 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
6003 Gs
600.3 mT
|
2.23 kg / 4.92 pounds
2230.0 g / 21.9 N
|
medium risk |
| 1 mm |
4815 Gs
481.5 mT
|
1.44 kg / 3.16 pounds
1435.1 g / 14.1 N
|
low risk |
| 2 mm |
3743 Gs
374.3 mT
|
0.87 kg / 1.91 pounds
867.2 g / 8.5 N
|
low risk |
| 3 mm |
2869 Gs
286.9 mT
|
0.51 kg / 1.12 pounds
509.3 g / 5.0 N
|
low risk |
| 5 mm |
1696 Gs
169.6 mT
|
0.18 kg / 0.39 pounds
177.9 g / 1.7 N
|
low risk |
| 10 mm |
570 Gs
57.0 mT
|
0.02 kg / 0.04 pounds
20.1 g / 0.2 N
|
low risk |
| 15 mm |
256 Gs
25.6 mT
|
0.00 kg / 0.01 pounds
4.1 g / 0.0 N
|
low risk |
| 20 mm |
137 Gs
13.7 mT
|
0.00 kg / 0.00 pounds
1.2 g / 0.0 N
|
low risk |
| 30 mm |
54 Gs
5.4 mT
|
0.00 kg / 0.00 pounds
0.2 g / 0.0 N
|
low risk |
| 50 mm |
15 Gs
1.5 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
low risk |
Table 2: Slippage hold (vertical surface)
MW 10x20 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.45 kg / 0.98 pounds
446.0 g / 4.4 N
|
| 1 mm | Stal (~0.2) |
0.29 kg / 0.63 pounds
288.0 g / 2.8 N
|
| 2 mm | Stal (~0.2) |
0.17 kg / 0.38 pounds
174.0 g / 1.7 N
|
| 3 mm | Stal (~0.2) |
0.10 kg / 0.22 pounds
102.0 g / 1.0 N
|
| 5 mm | Stal (~0.2) |
0.04 kg / 0.08 pounds
36.0 g / 0.4 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: Vertical assembly (shearing) - behavior on slippery surfaces
MW 10x20 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.67 kg / 1.47 pounds
669.0 g / 6.6 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.45 kg / 0.98 pounds
446.0 g / 4.4 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.22 kg / 0.49 pounds
223.0 g / 2.2 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.12 kg / 2.46 pounds
1115.0 g / 10.9 N
|
Table 4: Material efficiency (substrate influence) - power losses
MW 10x20 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.22 kg / 0.49 pounds
223.0 g / 2.2 N
|
| 1 mm |
|
0.56 kg / 1.23 pounds
557.5 g / 5.5 N
|
| 2 mm |
|
1.12 kg / 2.46 pounds
1115.0 g / 10.9 N
|
| 3 mm |
|
1.67 kg / 3.69 pounds
1672.5 g / 16.4 N
|
| 5 mm |
|
2.23 kg / 4.92 pounds
2230.0 g / 21.9 N
|
| 10 mm |
|
2.23 kg / 4.92 pounds
2230.0 g / 21.9 N
|
| 11 mm |
|
2.23 kg / 4.92 pounds
2230.0 g / 21.9 N
|
| 12 mm |
|
2.23 kg / 4.92 pounds
2230.0 g / 21.9 N
|
Table 5: Thermal resistance (material behavior) - thermal limit
MW 10x20 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
2.23 kg / 4.92 pounds
2230.0 g / 21.9 N
|
OK |
| 40 °C | -2.2% |
2.18 kg / 4.81 pounds
2180.9 g / 21.4 N
|
OK |
| 60 °C | -4.4% |
2.13 kg / 4.70 pounds
2131.9 g / 20.9 N
|
OK |
| 80 °C | -6.6% |
2.08 kg / 4.59 pounds
2082.8 g / 20.4 N
|
|
| 100 °C | -28.8% |
1.59 kg / 3.50 pounds
1587.8 g / 15.6 N
|
Table 6: Two magnets (attraction) - field range
MW 10x20 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
17.45 kg / 38.46 pounds
6 140 Gs
|
2.62 kg / 5.77 pounds
2617 g / 25.7 N
|
N/A |
| 1 mm |
14.15 kg / 31.20 pounds
10 813 Gs
|
2.12 kg / 4.68 pounds
2123 g / 20.8 N
|
12.74 kg / 28.08 pounds
~0 Gs
|
| 2 mm |
11.23 kg / 24.75 pounds
9 631 Gs
|
1.68 kg / 3.71 pounds
1684 g / 16.5 N
|
10.11 kg / 22.28 pounds
~0 Gs
|
| 3 mm |
8.78 kg / 19.35 pounds
8 515 Gs
|
1.32 kg / 2.90 pounds
1316 g / 12.9 N
|
7.90 kg / 17.41 pounds
~0 Gs
|
| 5 mm |
5.21 kg / 11.48 pounds
6 559 Gs
|
0.78 kg / 1.72 pounds
781 g / 7.7 N
|
4.69 kg / 10.33 pounds
~0 Gs
|
| 10 mm |
1.39 kg / 3.07 pounds
3 391 Gs
|
0.21 kg / 0.46 pounds
209 g / 2.0 N
|
1.25 kg / 2.76 pounds
~0 Gs
|
| 20 mm |
0.16 kg / 0.35 pounds
1 140 Gs
|
0.02 kg / 0.05 pounds
24 g / 0.2 N
|
0.14 kg / 0.31 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.01 pounds
165 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
107 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
74 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
53 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
39 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
30 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Protective zones (electronics) - warnings
MW 10x20 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 8.0 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 |
| Car key | 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) | 1.0 cm |
Table 8: Collisions (cracking risk) - warning
MW 10x20 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
13.95 km/h
(3.88 m/s)
|
0.09 J | |
| 30 mm |
24.03 km/h
(6.68 m/s)
|
0.26 J | |
| 50 mm |
31.03 km/h
(8.62 m/s)
|
0.44 J | |
| 100 mm |
43.88 km/h
(12.19 m/s)
|
0.88 J |
Table 9: Coating parameters (durability)
MW 10x20 / 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 10x20 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 5 223 Mx | 52.2 µWb |
| Pc Coefficient | 1.21 | High (Stable) |
Table 11: Submerged application
MW 10x20 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 2.23 kg | Standard |
| Water (riverbed) |
2.55 kg
(+0.32 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Warning: On a vertical wall, the magnet holds just ~20% of its nominal pull.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) severely reduces the holding force.
3. Heat tolerance
*For standard magnets, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.21
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 products
Advantages as well as disadvantages of rare earth magnets.
Benefits
- They do not lose magnetism, even over approximately 10 years – the decrease in lifting capacity is only ~1% (theoretically),
- They show high resistance to demagnetization induced by external field influence,
- By applying a lustrous coating of gold, the element acquires an aesthetic look,
- Magnetic induction on the working layer of the magnet turns out to be impressive,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Possibility of custom modeling and optimizing to atypical applications,
- Universal use in future technologies – they are utilized in data components, motor assemblies, advanced medical instruments, also complex engineering applications.
- Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,
Disadvantages
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only protects the magnet but also increases its resistance to damage
- When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- They rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
- We recommend cover - magnetic holder, due to difficulties in producing nuts inside the magnet and complex shapes.
- Potential hazard to health – tiny shards of magnets are risky, if swallowed, which becomes key in the context of child safety. Furthermore, small elements of these products are able to be problematic in diagnostics medical after entering the body.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which increases costs of application in large quantities
Holding force characteristics
Best holding force of the magnet in ideal parameters – what it depends on?
- on a block made of structural steel, optimally conducting the magnetic flux
- with a cross-section minimum 10 mm
- with a plane perfectly flat
- with zero gap (no coatings)
- under perpendicular application of breakaway force (90-degree angle)
- in stable room temperature
Key elements affecting lifting force
- Clearance – existence of foreign body (rust, tape, air) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
- Force direction – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
- Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
- Material composition – different alloys attracts identically. Alloy additives worsen the attraction effect.
- Surface structure – the more even the surface, the better the adhesion and stronger the hold. Roughness creates an air distance.
- Thermal environment – heating the magnet causes a temporary drop of force. It is worth remembering the thermal limit for a given model.
Lifting capacity testing was carried out on a smooth plate of suitable thickness, under perpendicular forces, whereas under shearing force the holding force is lower. In addition, even a small distance between the magnet and the plate decreases the lifting capacity.
H&S for magnets
Implant safety
Life threat: Neodymium magnets can turn off pacemakers and defibrillators. Stay away if you have medical devices.
Caution required
Be careful. Rare earth magnets attract from a distance and snap with massive power, often faster than you can react.
Phone sensors
Navigation devices and mobile phones are highly sensitive to magnetism. Close proximity with a powerful NdFeB magnet can ruin the internal compass in your phone.
Magnetic media
Avoid bringing magnets near a wallet, computer, or screen. The magnetism can irreversibly ruin these devices and erase data from cards.
Thermal limits
Regular neodymium magnets (N-type) lose power when the temperature surpasses 80°C. Damage is permanent.
Sensitization to coating
Some people experience a hypersensitivity to Ni, which is the common plating for NdFeB magnets. Prolonged contact might lead to dermatitis. It is best to use safety gloves.
Danger to the youngest
Neodymium magnets are not intended for children. Eating a few magnets may result in them connecting inside the digestive tract, which poses a severe health hazard and requires urgent medical intervention.
Protective goggles
Neodymium magnets are sintered ceramics, which means they are fragile like glass. Clashing of two magnets will cause them breaking into small pieces.
Flammability
Mechanical processing of neodymium magnets poses a fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.
Crushing risk
Danger of trauma: The attraction force is so immense that it can result in hematomas, crushing, and even bone fractures. Protective gloves are recommended.
