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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Technical of the product - 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 |
Technical simulation of the magnet - technical parameters
Presented data represent the result of a mathematical analysis. Results rely on algorithms for the class Nd2Fe14B. Actual parameters might slightly differ. Treat these calculations as a supplementary guide during assembly planning.
Table 1: Static force (pull vs gap) - interaction chart
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: Shear hold (wall)
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: Vertical assembly (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: Thermal resistance (stability) - thermal limit
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) - warnings
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 |
| Timepiece | 20 Gs (2.0 mT) | 2.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 1.5 cm |
| Car key | 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) - warning
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: Anti-corrosion coating 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 (Flux)
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)
*Caution: On a vertical surface, the magnet retains just ~20% of its nominal pull.
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 critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.31
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.
Chemical composition
| 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 also offers
Pros and cons of Nd2Fe14B magnets.
Benefits
- They retain attractive force for almost 10 years – the drop is just ~1% (according to analyses),
- Neodymium magnets are characterized by extremely resistant to loss of magnetic properties caused by external interference,
- The use of an aesthetic coating of noble metals (nickel, gold, silver) causes the element to have aesthetics,
- Magnets are distinguished by extremely high magnetic induction on the active area,
- Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling operation at temperatures approaching 230°C and above...
- Possibility of individual machining as well as optimizing to specific applications,
- Wide application in future technologies – they serve a role in magnetic memories, electric motors, medical equipment, also industrial machines.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Cons
- They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects the magnet but also increases its resistance to damage
- We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
- We suggest a housing - magnetic mount, due to difficulties in realizing nuts inside the magnet and complex shapes.
- Potential hazard resulting from small fragments of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child safety. Additionally, small elements of these products can be problematic in diagnostics medical when they are in the body.
- Due to neodymium price, their price is relatively high,
Lifting parameters
Optimal lifting capacity of a neodymium magnet – what it depends on?
- using a sheet made of mild steel, functioning as a ideal flux conductor
- with a thickness no less than 10 mm
- characterized by lack of roughness
- without any air gap between the magnet and steel
- for force applied at a right angle (in the magnet axis)
- at conditions approx. 20°C
Lifting capacity in practice – influencing factors
- Distance (betwixt the magnet and the plate), as even a very small clearance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to paint, rust 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 nominal value.
- Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of generating force.
- Metal type – different alloys attracts identically. High carbon content weaken the attraction effect.
- Surface finish – ideal contact is possible only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
- Temperature influence – high temperature weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.
Holding force was checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the load capacity is reduced by as much as fivefold. Moreover, even a slight gap between the magnet and the plate reduces the lifting capacity.
Warnings
Data carriers
Equipment safety: Strong magnets can damage data carriers and delicate electronics (heart implants, hearing aids, timepieces).
This is not a toy
These products are not suitable for play. Eating multiple magnets may result in them pinching intestinal walls, which poses a severe health hazard and necessitates immediate surgery.
Shattering risk
Protect your eyes. Magnets can fracture upon uncontrolled impact, launching shards into the air. Wear goggles.
Permanent damage
Monitor thermal conditions. Heating the magnet to high heat will ruin its magnetic structure and pulling force.
Metal Allergy
Certain individuals experience a contact allergy to Ni, which is the typical protective layer for neodymium magnets. Extended handling might lead to a rash. We suggest use safety gloves.
Keep away from electronics
A strong magnetic field negatively affects the functioning of compasses in smartphones and GPS navigation. Keep magnets close to a smartphone to avoid breaking the sensors.
Finger safety
Large magnets can crush fingers instantly. Under no circumstances place your hand betwixt two attracting surfaces.
Do not underestimate power
Exercise caution. Rare earth magnets act from a distance and snap with massive power, often faster than you can react.
Flammability
Fire warning: Rare earth powder is highly flammable. Do not process magnets in home conditions as this risks ignition.
Implant safety
For implant holders: Powerful magnets disrupt electronics. Keep at least 30 cm distance or ask another person to work with the magnets.
