MW 3x1 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010063
GTIN/EAN: 5906301810629
Diameter Ø
3 mm [±0,1 mm]
Height
1 mm [±0,1 mm]
Weight
0.05 g
Magnetization Direction
↑ axial
Load capacity
0.21 kg / 2.10 N
Magnetic Induction
342.82 mT / 3428 Gs
Coating
[NiCuNi] Nickel
0.1353 ZŁ with VAT / pcs + price for transport
0.1100 ZŁ net + 23% VAT / pcs
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Physical properties - MW 3x1 / N38 - cylindrical magnet
Specification / characteristics - MW 3x1 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010063 |
| GTIN/EAN | 5906301810629 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 3 mm [±0,1 mm] |
| Height | 1 mm [±0,1 mm] |
| Weight | 0.05 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.21 kg / 2.10 N |
| Magnetic Induction ~ ? | 342.82 mT / 3428 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 |
Technical simulation of the product - report
The following information constitute the outcome of a mathematical simulation. Values rely on algorithms for the class Nd2Fe14B. Actual performance may differ. Please consider these calculations as a reference point during assembly planning.
Table 1: Static pull force (force vs gap) - interaction chart
MW 3x1 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3422 Gs
342.2 mT
|
0.21 kg / 0.46 lbs
210.0 g / 2.1 N
|
weak grip |
| 1 mm |
1521 Gs
152.1 mT
|
0.04 kg / 0.09 lbs
41.5 g / 0.4 N
|
weak grip |
| 2 mm |
585 Gs
58.5 mT
|
0.01 kg / 0.01 lbs
6.1 g / 0.1 N
|
weak grip |
| 3 mm |
260 Gs
26.0 mT
|
0.00 kg / 0.00 lbs
1.2 g / 0.0 N
|
weak grip |
| 5 mm |
76 Gs
7.6 mT
|
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
|
weak grip |
| 10 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
weak grip |
| 15 mm |
4 Gs
0.4 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
weak grip |
| 20 mm |
2 Gs
0.2 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
weak grip |
| 30 mm |
0 Gs
0.0 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
weak grip |
| 50 mm |
0 Gs
0.0 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
weak grip |
Table 2: Slippage load (wall)
MW 3x1 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.04 kg / 0.09 lbs
42.0 g / 0.4 N
|
| 1 mm | Stal (~0.2) |
0.01 kg / 0.02 lbs
8.0 g / 0.1 N
|
| 2 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
2.0 g / 0.0 N
|
| 3 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
| 5 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
0.0 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: Vertical assembly (sliding) - behavior on slippery surfaces
MW 3x1 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.06 kg / 0.14 lbs
63.0 g / 0.6 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.04 kg / 0.09 lbs
42.0 g / 0.4 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.02 kg / 0.05 lbs
21.0 g / 0.2 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.11 kg / 0.23 lbs
105.0 g / 1.0 N
|
Table 4: Material efficiency (saturation) - power losses
MW 3x1 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.02 kg / 0.05 lbs
21.0 g / 0.2 N
|
| 1 mm |
|
0.05 kg / 0.12 lbs
52.5 g / 0.5 N
|
| 2 mm |
|
0.11 kg / 0.23 lbs
105.0 g / 1.0 N
|
| 3 mm |
|
0.16 kg / 0.35 lbs
157.5 g / 1.5 N
|
| 5 mm |
|
0.21 kg / 0.46 lbs
210.0 g / 2.1 N
|
| 10 mm |
|
0.21 kg / 0.46 lbs
210.0 g / 2.1 N
|
| 11 mm |
|
0.21 kg / 0.46 lbs
210.0 g / 2.1 N
|
| 12 mm |
|
0.21 kg / 0.46 lbs
210.0 g / 2.1 N
|
Table 5: Working in heat (material behavior) - resistance threshold
MW 3x1 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.21 kg / 0.46 lbs
210.0 g / 2.1 N
|
OK |
| 40 °C | -2.2% |
0.21 kg / 0.45 lbs
205.4 g / 2.0 N
|
OK |
| 60 °C | -4.4% |
0.20 kg / 0.44 lbs
200.8 g / 2.0 N
|
|
| 80 °C | -6.6% |
0.20 kg / 0.43 lbs
196.1 g / 1.9 N
|
|
| 100 °C | -28.8% |
0.15 kg / 0.33 lbs
149.5 g / 1.5 N
|
Table 6: Two magnets (repulsion) - field range
MW 3x1 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
0.51 kg / 1.12 lbs
4 928 Gs
|
0.08 kg / 0.17 lbs
77 g / 0.8 N
|
N/A |
| 1 mm |
0.26 kg / 0.56 lbs
4 847 Gs
|
0.04 kg / 0.08 lbs
38 g / 0.4 N
|
0.23 kg / 0.51 lbs
~0 Gs
|
| 2 mm |
0.10 kg / 0.22 lbs
3 042 Gs
|
0.02 kg / 0.03 lbs
15 g / 0.1 N
|
0.09 kg / 0.20 lbs
~0 Gs
|
| 3 mm |
0.04 kg / 0.08 lbs
1 865 Gs
|
0.01 kg / 0.01 lbs
6 g / 0.1 N
|
0.03 kg / 0.08 lbs
~0 Gs
|
| 5 mm |
0.01 kg / 0.01 lbs
764 Gs
|
0.00 kg / 0.00 lbs
1 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 10 mm |
0.00 kg / 0.00 lbs
153 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 lbs
23 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 lbs
2 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
1 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
1 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
0 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
0 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
0 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
Table 7: Safety (HSE) (implants) - warnings
MW 3x1 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 1.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 1.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 1.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 1.0 cm |
| Car key | 50 Gs (5.0 mT) | 1.0 cm |
| Payment card | 400 Gs (40.0 mT) | 0.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 0.5 cm |
Table 8: Collisions (cracking risk) - collision effects
MW 3x1 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
65.36 km/h
(18.16 m/s)
|
0.01 J | |
| 30 mm |
113.21 km/h
(31.45 m/s)
|
0.02 J | |
| 50 mm |
146.15 km/h
(40.60 m/s)
|
0.04 J | |
| 100 mm |
206.68 km/h
(57.41 m/s)
|
0.08 J |
Table 9: Corrosion resistance
MW 3x1 / 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 3x1 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 257 Mx | 2.6 µWb |
| Pc Coefficient | 0.44 | Low (Flat) |
Table 11: Physics of underwater searching
MW 3x1 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.21 kg | Standard |
| Water (riverbed) |
0.24 kg
(+0.03 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Caution: On a vertical surface, the magnet holds just a fraction of its perpendicular strength.
2. Steel saturation
*Thin steel (e.g. 0.5mm PC case) drastically weakens the holding force.
3. Power loss vs temp
*For N38 material, the safety 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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Check out more products
Pros as well as cons of Nd2Fe14B magnets.
Advantages
- They retain magnetic properties for almost ten years – the drop is just ~1% (based on simulations),
- They possess excellent resistance to magnetism drop due to external magnetic sources,
- In other words, due to the glossy layer of silver, the element gains a professional look,
- Neodymium magnets deliver maximum magnetic induction on a their surface, which ensures high operational effectiveness,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
- In view of the possibility of free forming and adaptation to custom needs, NdFeB magnets can be created in a broad palette of geometric configurations, which increases their versatility,
- Key role in advanced technology sectors – they are commonly used in magnetic memories, electromotive mechanisms, diagnostic systems, as well as multitasking production systems.
- Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,
Weaknesses
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
- NdFeB magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening 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 extremely resistant to heat
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
- Limited possibility of creating threads in the magnet and complex forms - recommended is cover - magnet mounting.
- Potential hazard resulting from small fragments of magnets are risky, if swallowed, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these devices are able to disrupt the diagnostic process medical after entering the body.
- With mass production the cost of neodymium magnets is a challenge,
Holding force characteristics
Maximum magnetic pulling force – what it depends on?
- on a block made of structural steel, perfectly concentrating the magnetic flux
- whose thickness is min. 10 mm
- characterized by even structure
- with direct contact (without impurities)
- for force acting at a right angle (pull-off, not shear)
- at standard ambient temperature
Impact of factors on magnetic holding capacity in practice
- Clearance – the presence of foreign body (paint, tape, gap) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
- Loading method – catalog parameter refers to pulling vertically. When applying parallel force, the magnet exhibits much less (often approx. 20-30% of maximum force).
- Steel thickness – too thin plate causes magnetic saturation, causing part of the flux to be lost to the other side.
- Steel grade – the best choice is pure iron steel. Cast iron may attract less.
- Plate texture – smooth surfaces guarantee perfect abutment, which increases force. Rough surfaces reduce efficiency.
- Thermal environment – heating the magnet results in weakening of induction. Check the maximum operating temperature for a given model.
Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under perpendicular forces, however under attempts to slide the magnet the load capacity is reduced by as much as 5 times. Moreover, even a minimal clearance between the magnet’s surface and the plate reduces the lifting capacity.
Precautions when working with neodymium magnets
Handling guide
Handle with care. Neodymium magnets attract from a distance and snap with huge force, often quicker than you can react.
Danger to the youngest
NdFeB magnets are not suitable for play. Swallowing a few magnets can lead to them attracting across intestines, which poses a direct threat to life and requires urgent medical intervention.
GPS Danger
A powerful magnetic field negatively affects the functioning of compasses in smartphones and GPS navigation. Do not bring magnets close to a device to prevent breaking the sensors.
Cards and drives
Intense magnetic fields can destroy records on credit cards, hard drives, and storage devices. Maintain a gap of at least 10 cm.
Health Danger
For implant holders: Strong magnetic fields affect medical devices. Maintain at least 30 cm distance or ask another person to handle the magnets.
Finger safety
Protect your hands. Two large magnets will join instantly with a force of massive weight, destroying everything in their path. Exercise extreme caution!
Demagnetization risk
Regular neodymium magnets (grade N) lose magnetization when the temperature surpasses 80°C. This process is irreversible.
Fragile material
Despite the nickel coating, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.
Dust explosion hazard
Drilling and cutting of neodymium magnets poses a fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.
Avoid contact if allergic
It is widely known that the nickel plating (standard magnet coating) is a strong allergen. If your skin reacts to metals, prevent direct skin contact and select encased magnets.
