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
bulk discounts:
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Product card - 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 modeling of the product - technical parameters
These information constitute the outcome of a mathematical calculation. Values are based on algorithms for the material Nd2Fe14B. Real-world performance might slightly differ from theoretical values. Use these data as a reference point for designers.
Table 1: Static force (force vs gap) - power drop
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
|
safe |
| 1 mm |
1521 Gs
152.1 mT
|
0.04 kg / 0.09 lbs
41.5 g / 0.4 N
|
safe |
| 2 mm |
585 Gs
58.5 mT
|
0.01 kg / 0.01 lbs
6.1 g / 0.1 N
|
safe |
| 3 mm |
260 Gs
26.0 mT
|
0.00 kg / 0.00 lbs
1.2 g / 0.0 N
|
safe |
| 5 mm |
76 Gs
7.6 mT
|
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
|
safe |
| 10 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
| 15 mm |
4 Gs
0.4 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
| 20 mm |
2 Gs
0.2 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
| 30 mm |
0 Gs
0.0 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
| 50 mm |
0 Gs
0.0 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
Table 2: Shear force (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 (shearing) - 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: Steel thickness (substrate influence) - sheet metal selection
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 (stability) - thermal limit
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: Magnet-Magnet interaction (attraction) - field range
MW 3x1 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear 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: Hazards (electronics) - precautionary measures
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 |
| Timepiece | 20 Gs (2.0 mT) | 1.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 1.0 cm |
| Remote | 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: Impact energy (cracking risk) - warning
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: Underwater work (magnet fishing)
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. Wall mount (shear)
*Note: On a vertical wall, the magnet holds just approx. 20-30% of its max power.
2. Steel thickness impact
*Thin steel (e.g. 0.5mm PC case) significantly weakens the holding force.
3. Temperature resistance
*For N38 material, the critical 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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Strengths as well as weaknesses of neodymium magnets.
Benefits
- They retain full power for around ten years – the drop is just ~1% (in theory),
- Neodymium magnets remain remarkably resistant to demagnetization caused by external interference,
- The use of an refined coating of noble metals (nickel, gold, silver) causes the element to have aesthetics,
- Neodymium magnets create maximum magnetic induction on a small surface, which ensures high operational effectiveness,
- 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 shaping and adjusting to specific requirements,
- Versatile presence in high-tech industry – they are commonly used in computer drives, electric motors, diagnostic systems, and technologically advanced constructions.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which makes them useful in miniature devices
Disadvantages
- At strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape and 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
- Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
- We suggest cover - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complex shapes.
- Health risk related to microscopic parts of magnets pose a threat, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small components of these magnets can complicate diagnosis medical in case of swallowing.
- Due to complex production process, their price exceeds standard values,
Holding force characteristics
Magnetic strength at its maximum – what affects it?
- with the contact of a sheet made of low-carbon steel, guaranteeing maximum field concentration
- whose thickness equals approx. 10 mm
- characterized by lack of roughness
- with total lack of distance (without paint)
- under axial application of breakaway force (90-degree angle)
- at temperature room level
Determinants of lifting force in real conditions
- Distance (betwixt the magnet and the plate), since even a tiny clearance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to paint, corrosion or debris).
- Force direction – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
- Plate thickness – too thin steel does not accept the full field, causing part of the power to be escaped to the other side.
- Metal type – different alloys attracts identically. Alloy additives worsen the interaction with the magnet.
- Surface finish – ideal contact is obtained only on smooth steel. Any scratches and bumps create air cushions, weakening the magnet.
- Thermal factor – hot environment weakens magnetic field. Exceeding the limit temperature can permanently damage the magnet.
Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet and the plate reduces the load capacity.
Safe handling of neodymium magnets
Finger safety
Danger of trauma: The pulling power is so great that it can result in blood blisters, crushing, and broken bones. Protective gloves are recommended.
Do not underestimate power
Before starting, read the rules. Uncontrolled attraction can break the magnet or injure your hand. Think ahead.
GPS Danger
Navigation devices and smartphones are extremely susceptible to magnetism. Direct contact with a powerful NdFeB magnet can ruin the sensors in your phone.
Fire risk
Fire hazard: Neodymium dust is explosive. Avoid machining magnets without safety gear as this risks ignition.
Protective goggles
Protect your eyes. Magnets can fracture upon violent connection, launching shards into the air. We recommend safety glasses.
ICD Warning
Health Alert: Neodymium magnets can deactivate pacemakers and defibrillators. Stay away if you have electronic implants.
Power loss in heat
Standard neodymium magnets (grade N) lose power when the temperature goes above 80°C. This process is irreversible.
Danger to the youngest
Product intended for adults. Tiny parts can be swallowed, leading to serious injuries. Store away from children and animals.
Magnetic media
Avoid bringing magnets near a purse, computer, or screen. The magnetic field can irreversibly ruin these devices and wipe information from cards.
Skin irritation risks
Medical facts indicate that nickel (the usual finish) is a strong allergen. For allergy sufferers, refrain from direct skin contact and choose coated magnets.
