MW 7x1.5 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010393
GTIN/EAN: 5906301811091
Diameter Ø
7 mm [±0,1 mm]
Height
1.5 mm [±0,1 mm]
Weight
0.43 g
Magnetization Direction
↑ axial
Load capacity
0.69 kg / 6.75 N
Magnetic Induction
243.98 mT / 2440 Gs
Coating
[NiCuNi] Nickel
0.369 ZŁ with VAT / pcs + price for transport
0.300 ZŁ net + 23% VAT / pcs
bulk discounts:
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Product card - MW 7x1.5 / N38 - cylindrical magnet
Specification / characteristics - MW 7x1.5 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010393 |
| GTIN/EAN | 5906301811091 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 7 mm [±0,1 mm] |
| Height | 1.5 mm [±0,1 mm] |
| Weight | 0.43 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.69 kg / 6.75 N |
| Magnetic Induction ~ ? | 243.98 mT / 2440 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 simulation of the product - data
These data are the result of a mathematical analysis. Values were calculated on models for the class Nd2Fe14B. Real-world conditions may deviate from the simulation results. Please consider these data as a reference point for designers.
Table 1: Static force (pull vs distance) - power drop
MW 7x1.5 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
2438 Gs
243.8 mT
|
0.69 kg / 1.52 LBS
690.0 g / 6.8 N
|
safe |
| 1 mm |
1900 Gs
190.0 mT
|
0.42 kg / 0.92 LBS
419.1 g / 4.1 N
|
safe |
| 2 mm |
1308 Gs
130.8 mT
|
0.20 kg / 0.44 LBS
198.6 g / 1.9 N
|
safe |
| 3 mm |
859 Gs
85.9 mT
|
0.09 kg / 0.19 LBS
85.7 g / 0.8 N
|
safe |
| 5 mm |
380 Gs
38.0 mT
|
0.02 kg / 0.04 LBS
16.7 g / 0.2 N
|
safe |
| 10 mm |
79 Gs
7.9 mT
|
0.00 kg / 0.00 LBS
0.7 g / 0.0 N
|
safe |
| 15 mm |
27 Gs
2.7 mT
|
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
|
safe |
| 20 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
| 30 mm |
4 Gs
0.4 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
| 50 mm |
1 Gs
0.1 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
Table 2: Vertical capacity (vertical surface)
MW 7x1.5 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.14 kg / 0.30 LBS
138.0 g / 1.4 N
|
| 1 mm | Stal (~0.2) |
0.08 kg / 0.19 LBS
84.0 g / 0.8 N
|
| 2 mm | Stal (~0.2) |
0.04 kg / 0.09 LBS
40.0 g / 0.4 N
|
| 3 mm | Stal (~0.2) |
0.02 kg / 0.04 LBS
18.0 g / 0.2 N
|
| 5 mm | Stal (~0.2) |
0.00 kg / 0.01 LBS
4.0 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: Wall mounting (sliding) - behavior on slippery surfaces
MW 7x1.5 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.21 kg / 0.46 LBS
207.0 g / 2.0 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.14 kg / 0.30 LBS
138.0 g / 1.4 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.07 kg / 0.15 LBS
69.0 g / 0.7 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.35 kg / 0.76 LBS
345.0 g / 3.4 N
|
Table 4: Steel thickness (saturation) - power losses
MW 7x1.5 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.07 kg / 0.15 LBS
69.0 g / 0.7 N
|
| 1 mm |
|
0.17 kg / 0.38 LBS
172.5 g / 1.7 N
|
| 2 mm |
|
0.35 kg / 0.76 LBS
345.0 g / 3.4 N
|
| 3 mm |
|
0.52 kg / 1.14 LBS
517.5 g / 5.1 N
|
| 5 mm |
|
0.69 kg / 1.52 LBS
690.0 g / 6.8 N
|
| 10 mm |
|
0.69 kg / 1.52 LBS
690.0 g / 6.8 N
|
| 11 mm |
|
0.69 kg / 1.52 LBS
690.0 g / 6.8 N
|
| 12 mm |
|
0.69 kg / 1.52 LBS
690.0 g / 6.8 N
|
Table 5: Working in heat (material behavior) - power drop
MW 7x1.5 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.69 kg / 1.52 LBS
690.0 g / 6.8 N
|
OK |
| 40 °C | -2.2% |
0.67 kg / 1.49 LBS
674.8 g / 6.6 N
|
OK |
| 60 °C | -4.4% |
0.66 kg / 1.45 LBS
659.6 g / 6.5 N
|
|
| 80 °C | -6.6% |
0.64 kg / 1.42 LBS
644.5 g / 6.3 N
|
|
| 100 °C | -28.8% |
0.49 kg / 1.08 LBS
491.3 g / 4.8 N
|
Table 6: Magnet-Magnet interaction (attraction) - field range
MW 7x1.5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
1.41 kg / 3.11 LBS
4 025 Gs
|
0.21 kg / 0.47 LBS
212 g / 2.1 N
|
N/A |
| 1 mm |
1.15 kg / 2.53 LBS
4 398 Gs
|
0.17 kg / 0.38 LBS
172 g / 1.7 N
|
1.03 kg / 2.28 LBS
~0 Gs
|
| 2 mm |
0.86 kg / 1.89 LBS
3 801 Gs
|
0.13 kg / 0.28 LBS
129 g / 1.3 N
|
0.77 kg / 1.70 LBS
~0 Gs
|
| 3 mm |
0.60 kg / 1.33 LBS
3 185 Gs
|
0.09 kg / 0.20 LBS
90 g / 0.9 N
|
0.54 kg / 1.19 LBS
~0 Gs
|
| 5 mm |
0.27 kg / 0.59 LBS
2 125 Gs
|
0.04 kg / 0.09 LBS
40 g / 0.4 N
|
0.24 kg / 0.53 LBS
~0 Gs
|
| 10 mm |
0.03 kg / 0.08 LBS
759 Gs
|
0.01 kg / 0.01 LBS
5 g / 0.1 N
|
0.03 kg / 0.07 LBS
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 LBS
159 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
13 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
8 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
5 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
3 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
2 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
2 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Protective zones (electronics) - precautionary measures
MW 7x1.5 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 3.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 2.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 2.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 1.5 cm |
| Remote | 50 Gs (5.0 mT) | 1.5 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 7x1.5 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
40.43 km/h
(11.23 m/s)
|
0.03 J | |
| 30 mm |
69.97 km/h
(19.44 m/s)
|
0.08 J | |
| 50 mm |
90.34 km/h
(25.09 m/s)
|
0.14 J | |
| 100 mm |
127.75 km/h
(35.49 m/s)
|
0.27 J |
Table 9: Coating parameters (durability)
MW 7x1.5 / 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 (Pc)
MW 7x1.5 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 1 075 Mx | 10.8 µWb |
| Pc Coefficient | 0.31 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MW 7x1.5 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.69 kg | Standard |
| Water (riverbed) |
0.79 kg
(+0.10 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Warning: On a vertical wall, the magnet retains only approx. 20-30% of its perpendicular strength.
2. Steel saturation
*Thin steel (e.g. computer case) drastically reduces the holding force.
3. Temperature resistance
*For N38 material, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.31
The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. 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 |
See more products
Strengths and weaknesses of rare earth magnets.
Benefits
- They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (in laboratory conditions),
- They feature excellent resistance to magnetism drop due to external fields,
- The use of an refined finish of noble metals (nickel, gold, silver) causes the element to look better,
- They feature high magnetic induction at the operating surface, which improves attraction properties,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the shape) even at a temperature of 230°C or more...
- Thanks to the option of accurate shaping and customization to specialized projects, magnetic components can be manufactured in a broad palette of forms and dimensions, which expands the range of possible applications,
- Versatile presence in electronics industry – they are used in magnetic memories, motor assemblies, medical equipment, and complex engineering applications.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Limitations
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
- Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
- They oxidize in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
- Limited ability of creating threads in the magnet and complex forms - recommended is a housing - magnetic holder.
- Possible danger resulting from small fragments of magnets are risky, if swallowed, which is particularly important in the context of child safety. Additionally, tiny parts of these devices can be problematic in diagnostics medical when they are in the body.
- Due to expensive raw materials, their price is relatively high,
Holding force characteristics
Maximum magnetic pulling force – what it depends on?
- with the application of a yoke made of low-carbon steel, ensuring maximum field concentration
- possessing a massiveness of at least 10 mm to ensure full flux closure
- characterized by even structure
- with direct contact (without paint)
- for force acting at a right angle (pull-off, not shear)
- at ambient temperature room level
Impact of factors on magnetic holding capacity in practice
- Distance (between the magnet and the metal), as even a very small clearance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to paint, rust or debris).
- Force direction – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
- Steel thickness – insufficiently thick steel does not accept the full field, causing part of the flux to be lost to the other side.
- Steel type – mild steel gives the best results. Higher carbon content decrease magnetic permeability and holding force.
- Surface structure – the smoother and more polished the plate, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
- Thermal conditions – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures gain strength (up to a certain limit).
Lifting capacity was assessed with the use of a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, in contrast under shearing force the holding force is lower. Additionally, even a slight gap between the magnet and the plate reduces the lifting capacity.
Safe handling of neodymium magnets
Fragile material
Protect your eyes. Magnets can explode upon violent connection, ejecting shards into the air. We recommend safety glasses.
Nickel allergy
Some people suffer from a hypersensitivity to Ni, which is the common plating for NdFeB magnets. Extended handling can result in an allergic reaction. We strongly advise wear safety gloves.
Warning for heart patients
Individuals with a ICD should keep an safe separation from magnets. The magnetic field can stop the functioning of the implant.
Impact on smartphones
Navigation devices and smartphones are highly sensitive to magnetic fields. Direct contact with a strong magnet can ruin the sensors in your phone.
Heat sensitivity
Watch the temperature. Exposing the magnet above 80 degrees Celsius will destroy its magnetic structure and pulling force.
Protect data
Data protection: Neodymium magnets can damage data carriers and sensitive devices (heart implants, hearing aids, mechanical watches).
Serious injuries
Large magnets can crush fingers instantly. Never put your hand betwixt two strong magnets.
Combustion hazard
Machining of neodymium magnets carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.
Safe operation
Before starting, read the rules. Uncontrolled attraction can break the magnet or injure your hand. Think ahead.
Adults only
Always keep magnets out of reach of children. Ingestion danger is significant, and the effects of magnets clamping inside the body are very dangerous.
