MW 10x30 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010009
GTIN/EAN: 5906301810087
Diameter Ø
10 mm [±0,1 mm]
Height
30 mm [±0,1 mm]
Weight
17.67 g
Magnetization Direction
↑ axial
Load capacity
1.92 kg / 18.79 N
Magnetic Induction
610.80 mT / 6108 Gs
Coating
[NiCuNi] Nickel
8.61 ZŁ with VAT / pcs + price for transport
7.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Detailed specification - MW 10x30 / N38 - cylindrical magnet
Specification / characteristics - MW 10x30 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010009 |
| GTIN/EAN | 5906301810087 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 10 mm [±0,1 mm] |
| Height | 30 mm [±0,1 mm] |
| Weight | 17.67 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 1.92 kg / 18.79 N |
| Magnetic Induction ~ ? | 610.80 mT / 6108 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 modeling of the product - data
Presented data represent the direct effect of a physical calculation. Results are based on models for the class Nd2Fe14B. Real-world parameters might slightly differ from theoretical values. Use these data as a supplementary guide during assembly planning.
Table 1: Static force (pull vs distance) - characteristics
MW 10x30 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
6103 Gs
610.3 mT
|
1.92 kg / 4.23 pounds
1920.0 g / 18.8 N
|
weak grip |
| 1 mm |
4905 Gs
490.5 mT
|
1.24 kg / 2.73 pounds
1240.1 g / 12.2 N
|
weak grip |
| 2 mm |
3823 Gs
382.3 mT
|
0.75 kg / 1.66 pounds
753.3 g / 7.4 N
|
weak grip |
| 3 mm |
2940 Gs
294.0 mT
|
0.45 kg / 0.98 pounds
445.6 g / 4.4 N
|
weak grip |
| 5 mm |
1754 Gs
175.4 mT
|
0.16 kg / 0.35 pounds
158.5 g / 1.6 N
|
weak grip |
| 10 mm |
607 Gs
60.7 mT
|
0.02 kg / 0.04 pounds
19.0 g / 0.2 N
|
weak grip |
| 15 mm |
280 Gs
28.0 mT
|
0.00 kg / 0.01 pounds
4.0 g / 0.0 N
|
weak grip |
| 20 mm |
154 Gs
15.4 mT
|
0.00 kg / 0.00 pounds
1.2 g / 0.0 N
|
weak grip |
| 30 mm |
63 Gs
6.3 mT
|
0.00 kg / 0.00 pounds
0.2 g / 0.0 N
|
weak grip |
| 50 mm |
19 Gs
1.9 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
Table 2: Sliding hold (vertical surface)
MW 10x30 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.38 kg / 0.85 pounds
384.0 g / 3.8 N
|
| 1 mm | Stal (~0.2) |
0.25 kg / 0.55 pounds
248.0 g / 2.4 N
|
| 2 mm | Stal (~0.2) |
0.15 kg / 0.33 pounds
150.0 g / 1.5 N
|
| 3 mm | Stal (~0.2) |
0.09 kg / 0.20 pounds
90.0 g / 0.9 N
|
| 5 mm | Stal (~0.2) |
0.03 kg / 0.07 pounds
32.0 g / 0.3 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) - vertical pull
MW 10x30 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.58 kg / 1.27 pounds
576.0 g / 5.7 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.38 kg / 0.85 pounds
384.0 g / 3.8 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.19 kg / 0.42 pounds
192.0 g / 1.9 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.96 kg / 2.12 pounds
960.0 g / 9.4 N
|
Table 4: Material efficiency (saturation) - power losses
MW 10x30 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.19 kg / 0.42 pounds
192.0 g / 1.9 N
|
| 1 mm |
|
0.48 kg / 1.06 pounds
480.0 g / 4.7 N
|
| 2 mm |
|
0.96 kg / 2.12 pounds
960.0 g / 9.4 N
|
| 3 mm |
|
1.44 kg / 3.17 pounds
1440.0 g / 14.1 N
|
| 5 mm |
|
1.92 kg / 4.23 pounds
1920.0 g / 18.8 N
|
| 10 mm |
|
1.92 kg / 4.23 pounds
1920.0 g / 18.8 N
|
| 11 mm |
|
1.92 kg / 4.23 pounds
1920.0 g / 18.8 N
|
| 12 mm |
|
1.92 kg / 4.23 pounds
1920.0 g / 18.8 N
|
Table 5: Thermal resistance (material behavior) - power drop
MW 10x30 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
1.92 kg / 4.23 pounds
1920.0 g / 18.8 N
|
OK |
| 40 °C | -2.2% |
1.88 kg / 4.14 pounds
1877.8 g / 18.4 N
|
OK |
| 60 °C | -4.4% |
1.84 kg / 4.05 pounds
1835.5 g / 18.0 N
|
OK |
| 80 °C | -6.6% |
1.79 kg / 3.95 pounds
1793.3 g / 17.6 N
|
|
| 100 °C | -28.8% |
1.37 kg / 3.01 pounds
1367.0 g / 13.4 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 10x30 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
18.04 kg / 39.76 pounds
6 166 Gs
|
2.71 kg / 5.96 pounds
2705 g / 26.5 N
|
N/A |
| 1 mm |
14.65 kg / 32.31 pounds
11 003 Gs
|
2.20 kg / 4.85 pounds
2198 g / 21.6 N
|
13.19 kg / 29.08 pounds
~0 Gs
|
| 2 mm |
11.65 kg / 25.68 pounds
9 810 Gs
|
1.75 kg / 3.85 pounds
1747 g / 17.1 N
|
10.48 kg / 23.11 pounds
~0 Gs
|
| 3 mm |
9.13 kg / 20.12 pounds
8 684 Gs
|
1.37 kg / 3.02 pounds
1369 g / 13.4 N
|
8.21 kg / 18.11 pounds
~0 Gs
|
| 5 mm |
5.45 kg / 12.02 pounds
6 710 Gs
|
0.82 kg / 1.80 pounds
818 g / 8.0 N
|
4.91 kg / 10.82 pounds
~0 Gs
|
| 10 mm |
1.49 kg / 3.28 pounds
3 507 Gs
|
0.22 kg / 0.49 pounds
223 g / 2.2 N
|
1.34 kg / 2.95 pounds
~0 Gs
|
| 20 mm |
0.18 kg / 0.39 pounds
1 213 Gs
|
0.03 kg / 0.06 pounds
27 g / 0.3 N
|
0.16 kg / 0.35 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.01 pounds
190 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 pounds
126 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
88 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
64 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
48 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
37 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Hazards (implants) - warnings
MW 10x30 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 8.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 6.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 5.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 4.0 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) | 1.5 cm |
Table 8: Dynamics (cracking risk) - collision effects
MW 10x30 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
10.58 km/h
(2.94 m/s)
|
0.08 J | |
| 30 mm |
18.21 km/h
(5.06 m/s)
|
0.23 J | |
| 50 mm |
23.51 km/h
(6.53 m/s)
|
0.38 J | |
| 100 mm |
33.24 km/h
(9.23 m/s)
|
0.75 J |
Table 9: Surface protection spec
MW 10x30 / 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 10x30 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 5 528 Mx | 55.3 µWb |
| Pc Coefficient | 1.38 | High (Stable) |
Table 11: Submerged application
MW 10x30 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 1.92 kg | Standard |
| Water (riverbed) |
2.20 kg
(+0.28 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Caution: On a vertical wall, the magnet retains just a fraction of its max power.
2. Plate thickness effect
*Thin steel (e.g. 0.5mm PC case) severely reduces the holding force.
3. Power loss vs temp
*For N38 grade, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.38
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 Nd2Fe14B magnets.
Benefits
- They retain attractive force for nearly 10 years – the drop is just ~1% (according to analyses),
- They do not lose their magnetic properties even under external field action,
- The use of an refined coating of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
- Magnets have excellent magnetic induction on the outer side,
- Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
- Possibility of precise creating and adjusting to specific requirements,
- Universal use in high-tech industry – they are used in computer drives, motor assemblies, medical devices, as well as technologically advanced constructions.
- Thanks to their power density, small magnets offer high operating force, with minimal size,
Limitations
- At strong impacts they can crack, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
- When exposed to high temperature, neodymium magnets experience a drop in power. 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
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
- Due to limitations in creating nuts and complex shapes in magnets, we recommend using casing - magnetic mechanism.
- Possible danger related to microscopic parts of magnets are risky, if swallowed, which gains importance in the context of child health protection. It is also worth noting that small elements of these magnets can be problematic in diagnostics medical in case of swallowing.
- 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
Lifting parameters
Magnetic strength at its maximum – what affects it?
- on a base made of mild steel, effectively closing the magnetic field
- possessing a massiveness of minimum 10 mm to ensure full flux closure
- with an ideally smooth touching surface
- without the slightest insulating layer between the magnet and steel
- during detachment in a direction perpendicular to the mounting surface
- at standard ambient temperature
Key elements affecting lifting force
- Air gap (between the magnet and the plate), as even a microscopic distance (e.g. 0.5 mm) leads to a reduction in lifting capacity by up to 50% (this also applies to varnish, corrosion or dirt).
- Pull-off angle – note that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
- Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
- Material composition – different alloys attracts identically. High carbon content worsen the attraction effect.
- Surface condition – smooth surfaces guarantee perfect abutment, which increases force. Uneven metal weaken the grip.
- Thermal conditions – neodymium magnets have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).
Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate lowers the load capacity.
Warnings
GPS Danger
A strong magnetic field disrupts the functioning of compasses in smartphones and GPS navigation. Maintain magnets near a smartphone to avoid breaking the sensors.
No play value
NdFeB magnets are not suitable for play. Swallowing several magnets may result in them connecting inside the digestive tract, which poses a critical condition and requires immediate surgery.
Material brittleness
Watch out for shards. Magnets can explode upon violent connection, ejecting shards into the air. We recommend safety glasses.
Physical harm
Risk of injury: The attraction force is so great that it can cause hematomas, crushing, and broken bones. Protective gloves are recommended.
Skin irritation risks
Some people suffer from a hypersensitivity to nickel, which is the typical protective layer for neodymium magnets. Extended handling may cause a rash. We strongly advise use protective gloves.
Operating temperature
Watch the temperature. Heating the magnet above 80 degrees Celsius will ruin its properties and strength.
Do not drill into magnets
Drilling and cutting of neodymium magnets carries a risk of fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.
Warning for heart patients
For implant holders: Powerful magnets disrupt electronics. Keep at least 30 cm distance or ask another person to handle the magnets.
Handling guide
Before starting, read the rules. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.
Protect data
Device Safety: Neodymium magnets can damage payment cards and delicate electronics (pacemakers, medical aids, timepieces).
