MW 7x2 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010099
GTIN/EAN: 5906301810988
Diameter Ø
7 mm [±0,1 mm]
Height
2 mm [±0,1 mm]
Weight
0.58 g
Magnetization Direction
↑ axial
Load capacity
0.99 kg / 9.76 N
Magnetic Induction
307.23 mT / 3072 Gs
Coating
[NiCuNi] Nickel
0.381 ZŁ with VAT / pcs + price for transport
0.310 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Call us
+48 888 99 98 98
if you prefer get in touch via
request form
the contact section.
Parameters as well as appearance of magnetic components can be calculated with our
power calculator.
Orders submitted before 14:00 will be dispatched today!
Technical - MW 7x2 / N38 - cylindrical magnet
Specification / characteristics - MW 7x2 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010099 |
| GTIN/EAN | 5906301810988 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 7 mm [±0,1 mm] |
| Height | 2 mm [±0,1 mm] |
| Weight | 0.58 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.99 kg / 9.76 N |
| Magnetic Induction ~ ? | 307.23 mT / 3072 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 - data
Presented values constitute the outcome of a physical simulation. Results were calculated on algorithms for the class Nd2Fe14B. Real-world conditions may differ. Please consider these calculations as a reference point during assembly planning.
Table 1: Static pull force (pull vs gap) - interaction chart
MW 7x2 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3070 Gs
307.0 mT
|
0.99 kg / 2.18 lbs
990.0 g / 9.7 N
|
low risk |
| 1 mm |
2332 Gs
233.2 mT
|
0.57 kg / 1.26 lbs
571.1 g / 5.6 N
|
low risk |
| 2 mm |
1590 Gs
159.0 mT
|
0.27 kg / 0.59 lbs
265.5 g / 2.6 N
|
low risk |
| 3 mm |
1044 Gs
104.4 mT
|
0.11 kg / 0.25 lbs
114.6 g / 1.1 N
|
low risk |
| 5 mm |
466 Gs
46.6 mT
|
0.02 kg / 0.05 lbs
22.8 g / 0.2 N
|
low risk |
| 10 mm |
100 Gs
10.0 mT
|
0.00 kg / 0.00 lbs
1.1 g / 0.0 N
|
low risk |
| 15 mm |
35 Gs
3.5 mT
|
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
|
low risk |
| 20 mm |
16 Gs
1.6 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
low risk |
| 30 mm |
5 Gs
0.5 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
low risk |
| 50 mm |
1 Gs
0.1 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
low risk |
Table 2: Sliding capacity (wall)
MW 7x2 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.20 kg / 0.44 lbs
198.0 g / 1.9 N
|
| 1 mm | Stal (~0.2) |
0.11 kg / 0.25 lbs
114.0 g / 1.1 N
|
| 2 mm | Stal (~0.2) |
0.05 kg / 0.12 lbs
54.0 g / 0.5 N
|
| 3 mm | Stal (~0.2) |
0.02 kg / 0.05 lbs
22.0 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) - vertical pull
MW 7x2 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.30 kg / 0.65 lbs
297.0 g / 2.9 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.20 kg / 0.44 lbs
198.0 g / 1.9 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.10 kg / 0.22 lbs
99.0 g / 1.0 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.50 kg / 1.09 lbs
495.0 g / 4.9 N
|
Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 7x2 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.10 kg / 0.22 lbs
99.0 g / 1.0 N
|
| 1 mm |
|
0.25 kg / 0.55 lbs
247.5 g / 2.4 N
|
| 2 mm |
|
0.50 kg / 1.09 lbs
495.0 g / 4.9 N
|
| 3 mm |
|
0.74 kg / 1.64 lbs
742.5 g / 7.3 N
|
| 5 mm |
|
0.99 kg / 2.18 lbs
990.0 g / 9.7 N
|
| 10 mm |
|
0.99 kg / 2.18 lbs
990.0 g / 9.7 N
|
| 11 mm |
|
0.99 kg / 2.18 lbs
990.0 g / 9.7 N
|
| 12 mm |
|
0.99 kg / 2.18 lbs
990.0 g / 9.7 N
|
Table 5: Thermal stability (material behavior) - resistance threshold
MW 7x2 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.99 kg / 2.18 lbs
990.0 g / 9.7 N
|
OK |
| 40 °C | -2.2% |
0.97 kg / 2.13 lbs
968.2 g / 9.5 N
|
OK |
| 60 °C | -4.4% |
0.95 kg / 2.09 lbs
946.4 g / 9.3 N
|
|
| 80 °C | -6.6% |
0.92 kg / 2.04 lbs
924.7 g / 9.1 N
|
|
| 100 °C | -28.8% |
0.70 kg / 1.55 lbs
704.9 g / 6.9 N
|
Table 6: Two magnets (attraction) - field range
MW 7x2 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
2.24 kg / 4.93 lbs
4 653 Gs
|
0.34 kg / 0.74 lbs
335 g / 3.3 N
|
N/A |
| 1 mm |
1.76 kg / 3.89 lbs
5 454 Gs
|
0.26 kg / 0.58 lbs
265 g / 2.6 N
|
1.59 kg / 3.50 lbs
~0 Gs
|
| 2 mm |
1.29 kg / 2.84 lbs
4 663 Gs
|
0.19 kg / 0.43 lbs
193 g / 1.9 N
|
1.16 kg / 2.56 lbs
~0 Gs
|
| 3 mm |
0.89 kg / 1.97 lbs
3 884 Gs
|
0.13 kg / 0.30 lbs
134 g / 1.3 N
|
0.81 kg / 1.77 lbs
~0 Gs
|
| 5 mm |
0.40 kg / 0.87 lbs
2 581 Gs
|
0.06 kg / 0.13 lbs
59 g / 0.6 N
|
0.36 kg / 0.78 lbs
~0 Gs
|
| 10 mm |
0.05 kg / 0.11 lbs
932 Gs
|
0.01 kg / 0.02 lbs
8 g / 0.1 N
|
0.05 kg / 0.10 lbs
~0 Gs
|
| 20 mm |
0.00 kg / 0.01 lbs
200 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
17 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
10 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
6 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
4 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
3 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: Hazards (electronics) - warnings
MW 7x2 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 3.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 2.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 2.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 1.5 cm |
| Remote | 50 Gs (5.0 mT) | 1.5 cm |
| Payment card | 400 Gs (40.0 mT) | 1.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 0.5 cm |
Table 8: Collisions (kinetic energy) - collision effects
MW 7x2 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
41.69 km/h
(11.58 m/s)
|
0.04 J | |
| 30 mm |
72.17 km/h
(20.05 m/s)
|
0.12 J | |
| 50 mm |
93.17 km/h
(25.88 m/s)
|
0.19 J | |
| 100 mm |
131.76 km/h
(36.60 m/s)
|
0.39 J |
Table 9: Coating parameters (durability)
MW 7x2 / 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 7x2 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 1 284 Mx | 12.8 µWb |
| Pc Coefficient | 0.39 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MW 7x2 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.99 kg | Standard |
| Water (riverbed) |
1.13 kg
(+0.14 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Warning: On a vertical wall, the magnet retains just a fraction of its perpendicular strength.
2. Efficiency vs thickness
*Thin steel (e.g. 0.5mm PC case) drastically reduces the holding force.
3. Temperature resistance
*For standard magnets, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.39
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 |
Other deals
Pros as well as cons of Nd2Fe14B magnets.
Advantages
- They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (in laboratory conditions),
- They are resistant to demagnetization induced by external magnetic fields,
- In other words, due to the shiny layer of nickel, the element gains a professional look,
- The surface of neodymium magnets generates a strong magnetic field – this is one of their assets,
- Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling operation at temperatures reaching 230°C and above...
- Possibility of detailed creating and modifying to individual applications,
- Key role in innovative solutions – they serve a role in mass storage devices, motor assemblies, advanced medical instruments, and complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which makes them useful in small systems
Weaknesses
- To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
- Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
- Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture
- We suggest a housing - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complicated shapes.
- Potential hazard to health – tiny shards of magnets pose a threat, if swallowed, which is particularly important in the context of child health protection. Additionally, small elements of these magnets are able to complicate diagnosis medical in case of swallowing.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Holding force characteristics
Maximum lifting capacity of the magnet – what contributes to it?
- with the application of a yoke made of low-carbon steel, guaranteeing maximum field concentration
- possessing a massiveness of min. 10 mm to ensure full flux closure
- with a surface perfectly flat
- under conditions of ideal adhesion (surface-to-surface)
- during pulling in a direction vertical to the plane
- at conditions approx. 20°C
Key elements affecting lifting force
- Space between magnet and steel – every millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
- Force direction – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet exhibits much less (often approx. 20-30% of nominal force).
- Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
- Material type – the best choice is high-permeability steel. Stainless steels may have worse magnetic properties.
- Smoothness – full contact is obtained only on polished steel. Any scratches and bumps reduce the real contact area, reducing force.
- Thermal factor – hot environment reduces magnetic field. Too high temperature can permanently demagnetize the magnet.
Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under perpendicular forces, whereas under parallel forces the lifting capacity is smaller. Additionally, even a small distance between the magnet and the plate reduces the lifting capacity.
Safety rules for work with neodymium magnets
Medical implants
Life threat: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.
Shattering risk
Despite metallic appearance, neodymium is delicate and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.
Conscious usage
Exercise caution. Neodymium magnets attract from a distance and snap with massive power, often faster than you can react.
Electronic hazard
Intense magnetic fields can corrupt files on credit cards, hard drives, and other magnetic media. Keep a distance of min. 10 cm.
Dust explosion hazard
Fire warning: Neodymium dust is explosive. Avoid machining magnets without safety gear as this may cause fire.
GPS Danger
Note: rare earth magnets produce a field that disrupts sensitive sensors. Maintain a safe distance from your phone, tablet, and navigation systems.
Crushing risk
Large magnets can crush fingers instantly. Under no circumstances put your hand betwixt two strong magnets.
Allergy Warning
Nickel alert: The nickel-copper-nickel coating consists of nickel. If redness happens, immediately stop handling magnets and wear gloves.
Swallowing risk
Neodymium magnets are not suitable for play. Swallowing several magnets can lead to them connecting inside the digestive tract, which constitutes a critical condition and requires immediate surgery.
Permanent damage
Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and pulling force.
