MW 5x15 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010084
GTIN: 5906301810834
Diameter Ø
5 mm [±0,1 mm]
Height
15 mm [±0,1 mm]
Weight
2.21 g
Magnetization Direction
↑ axial
Load capacity
1.18 kg / 11.54 N
Magnetic Induction
610.03 mT
Coating
[NiCuNi] Nickel
1.107 ZŁ with VAT / pcs + price for transport
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MW 5x15 / N38 - cylindrical magnet
Specification / characteristics MW 5x15 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010084 |
| GTIN | 5906301810834 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 5 mm [±0,1 mm] |
| Height | 15 mm [±0,1 mm] |
| Weight | 2.21 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 1.18 kg / 11.54 N |
| Magnetic Induction ~ ? | 610.03 mT |
| 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 | T |
| 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 106 | °C-1 |
| Thermal expansion perpendicular (⊥) to orientation (M) | -(1-3) x 10-6 | °C-1 |
| Young's modulus | 1.7 x 104 | kg/mm² |
Physical analysis of the assembly - data
The following information represent the outcome of a mathematical simulation. Results rely on models for the class NdFeB. Operational performance might slightly deviate from the simulation results. Please consider these data as a supplementary guide during assembly planning.
MW 5x15 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg) | Risk Status |
|---|---|---|---|
| 0 mm |
6091 Gs
609.1 mT
|
1.18 kg / 1180.0 g
11.6 N
|
low risk |
| 1 mm |
3823 Gs
382.3 mT
|
0.46 kg / 464.9 g
4.6 N
|
low risk |
| 2 mm |
2261 Gs
226.1 mT
|
0.16 kg / 162.6 g
1.6 N
|
low risk |
| 5 mm |
607 Gs
60.7 mT
|
0.01 kg / 11.7 g
0.1 N
|
low risk |
| 10 mm |
154 Gs
15.4 mT
|
0.00 kg / 0.8 g
0.0 N
|
low risk |
| 15 mm |
63 Gs
6.3 mT
|
0.00 kg / 0.1 g
0.0 N
|
low risk |
| 20 mm |
32 Gs
3.2 mT
|
0.00 kg / 0.0 g
0.0 N
|
low risk |
| 30 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.0 g
0.0 N
|
low risk |
| 50 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.0 g
0.0 N
|
low risk |
MW 5x15 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.35 kg / 354.0 g
3.5 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.24 kg / 236.0 g
2.3 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.12 kg / 118.0 g
1.2 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.59 kg / 590.0 g
5.8 N
|
MW 5x15 / N38
| Steel thickness (mm) | % power | Real pull force (kg) |
|---|---|---|
| 0.5 mm |
|
0.12 kg / 118.0 g
1.2 N
|
| 1 mm |
|
0.30 kg / 295.0 g
2.9 N
|
| 2 mm |
|
0.59 kg / 590.0 g
5.8 N
|
| 5 mm |
|
1.18 kg / 1180.0 g
11.6 N
|
| 10 mm |
|
1.18 kg / 1180.0 g
11.6 N
|
MW 5x15 / N38
| Ambient temp. (°C) | Power loss | Remaining pull | Status |
|---|---|---|---|
| 20 °C | 0.0% |
1.18 kg / 1180.0 g
11.6 N
|
OK |
| 40 °C | -2.2% |
1.15 kg / 1154.0 g
11.3 N
|
OK |
| 60 °C | -4.4% |
1.13 kg / 1128.1 g
11.1 N
|
OK |
| 80 °C | -6.6% |
1.10 kg / 1102.1 g
10.8 N
|
|
| 100 °C | -28.8% |
0.84 kg / 840.2 g
8.2 N
|
MW 5x15 / N38
| Gap (mm) | Attraction (kg) (N-S) | Repulsion (kg) (N-N) |
|---|---|---|
| 0 mm |
1.77 kg / 1770.0 g
17.4 N
|
N/A |
| 2 mm |
0.24 kg / 240.0 g
2.4 N
|
0.22 kg / 224.0 g
2.2 N
|
| 5 mm |
0.02 kg / 15.0 g
0.1 N
|
0.01 kg / 14.0 g
0.1 N
|
| 10 mm |
0.00 kg / 0.0 g
0.0 N
|
0.00 kg / 0.0 g
0.0 N
|
| 20 mm |
0.00 kg / 0.0 g
0.0 N
|
0.00 kg / 0.0 g
0.0 N
|
| 50 mm |
0.00 kg / 0.0 g
0.0 N
|
0.00 kg / 0.0 g
0.0 N
|
MW 5x15 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 4.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 3.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 2.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 2.0 cm |
| Remote | 50 Gs (5.0 mT) | 2.0 cm |
| Payment card | 400 Gs (40.0 mT) | 1.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
MW 5x15 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
23.31 km/h
(6.48 m/s)
|
0.05 J | |
| 30 mm |
40.36 km/h
(11.21 m/s)
|
0.14 J | |
| 50 mm |
52.11 km/h
(14.47 m/s)
|
0.23 J | |
| 100 mm |
73.69 km/h
(20.47 m/s)
|
0.46 J |
MW 5x15 / 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) |
MW 5x15 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 1.18 kg | Standard |
| Water (riverbed) |
1.35 kg
(+0.17 kg Buoyancy gain)
|
+14.5% |
See also deals
Strengths as well as weaknesses of neodymium magnets.
Besides their tremendous magnetic power, neodymium magnets offer the following advantages:
- Their magnetic field is maintained, and after approximately ten years it decreases only by ~1% (according to research),
- They feature excellent resistance to magnetism drop as a result of opposing magnetic fields,
- A magnet with a metallic gold surface has an effective appearance,
- Magnets have impressive magnetic induction on the outer side,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
- Thanks to flexibility in forming and the capacity to modify to unusual requirements,
- Versatile presence in high-tech industry – they are commonly used in HDD drives, electric motors, advanced medical instruments, and technologically advanced constructions.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Disadvantages of NdFeB magnets:
- At very strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- 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. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- Limited ability of producing threads in the magnet and complex forms - preferred is casing - magnet mounting.
- Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child health protection. Additionally, small elements of these devices can disrupt the diagnostic process medical after entering the body.
- With mass production the cost of neodymium magnets can be a barrier,
Maximum lifting force for a neodymium magnet – what affects it?
The specified lifting capacity concerns the limit force, obtained under laboratory conditions, specifically:
- on a base made of structural steel, optimally conducting the magnetic flux
- whose transverse dimension equals approx. 10 mm
- characterized by smoothness
- without any clearance between the magnet and steel
- for force acting at a right angle (pull-off, not shear)
- at ambient temperature approx. 20 degrees Celsius
Key elements affecting lifting force
It is worth knowing that the application force may be lower influenced by elements below, in order of importance:
- Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) 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 significantly lower power (often approx. 20-30% of maximum force).
- Base massiveness – too thin plate does not close the flux, causing part of the flux to be escaped to the other side.
- Chemical composition of the base – mild steel attracts best. Higher carbon content lower magnetic properties and holding force.
- Plate texture – ground elements ensure maximum contact, which improves field saturation. Uneven metal reduce efficiency.
- Thermal conditions – neodymium magnets have a sensitivity to temperature. When it is hot they are weaker, and in frost gain strength (up to a certain limit).
* Lifting capacity was determined by applying a polished steel plate of optimal thickness (min. 20 mm), under vertically applied force, whereas under attempts to slide the magnet the load capacity is reduced by as much as 75%. In addition, even a minimal clearance {between} the magnet and the plate lowers the load capacity.
Warnings
Hand protection
Large magnets can smash fingers instantly. Do not place your hand betwixt two strong magnets.
Dust is flammable
Drilling and cutting of NdFeB material carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is difficult to extinguish.
Electronic devices
Device Safety: Strong magnets can damage payment cards and delicate electronics (heart implants, hearing aids, mechanical watches).
Thermal limits
Regular neodymium magnets (grade N) undergo demagnetization when the temperature surpasses 80°C. This process is irreversible.
Nickel coating and allergies
It is widely known that nickel (standard magnet coating) is a potent allergen. For allergy sufferers, prevent direct skin contact and choose encased magnets.
Magnetic interference
Navigation devices and mobile phones are extremely susceptible to magnetism. Direct contact with a strong magnet can ruin the sensors in your phone.
Material brittleness
NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Impact of two magnets will cause them cracking into small pieces.
Adults only
Only for adults. Tiny parts can be swallowed, leading to serious injuries. Store out of reach of kids and pets.
Medical interference
Patients with a pacemaker have to maintain an large gap from magnets. The magnetism can stop the operation of the implant.
Handling guide
Before starting, read the rules. Uncontrolled attraction can destroy the magnet or hurt your hand. Think ahead.
Important!
More info about risks in the article: Safety of working with magnets.
