MW 35x5 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010059
GTIN/EAN: 5906301810582
Diameter Ø
35 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
36.08 g
Magnetization Direction
↑ axial
Load capacity
9.25 kg / 90.73 N
Magnetic Induction
170.30 mT / 1703 Gs
Coating
[NiCuNi] Nickel
13.81 ZŁ with VAT / pcs + price for transport
11.23 ZŁ net + 23% VAT / pcs
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Technical - MW 35x5 / N38 - cylindrical magnet
Specification / characteristics - MW 35x5 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010059 |
| GTIN/EAN | 5906301810582 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 35 mm [±0,1 mm] |
| Height | 5 mm [±0,1 mm] |
| Weight | 36.08 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 9.25 kg / 90.73 N |
| Magnetic Induction ~ ? | 170.30 mT / 1703 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 magnet - data
These information represent the result of a mathematical simulation. Results are based on models for the material Nd2Fe14B. Operational performance may differ. Treat these data as a reference point for designers.
Table 1: Static force (pull vs gap) - characteristics
MW 35x5 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
1703 Gs
170.3 mT
|
9.25 kg / 20.39 lbs
9250.0 g / 90.7 N
|
strong |
| 1 mm |
1657 Gs
165.7 mT
|
8.76 kg / 19.31 lbs
8759.4 g / 85.9 N
|
strong |
| 2 mm |
1599 Gs
159.9 mT
|
8.15 kg / 17.97 lbs
8152.2 g / 80.0 N
|
strong |
| 3 mm |
1530 Gs
153.0 mT
|
7.47 kg / 16.47 lbs
7468.5 g / 73.3 N
|
strong |
| 5 mm |
1373 Gs
137.3 mT
|
6.01 kg / 13.25 lbs
6011.5 g / 59.0 N
|
strong |
| 10 mm |
959 Gs
95.9 mT
|
2.93 kg / 6.47 lbs
2932.7 g / 28.8 N
|
strong |
| 15 mm |
631 Gs
63.1 mT
|
1.27 kg / 2.80 lbs
1270.4 g / 12.5 N
|
weak grip |
| 20 mm |
413 Gs
41.3 mT
|
0.54 kg / 1.20 lbs
544.8 g / 5.3 N
|
weak grip |
| 30 mm |
190 Gs
19.0 mT
|
0.12 kg / 0.25 lbs
115.2 g / 1.1 N
|
weak grip |
| 50 mm |
56 Gs
5.6 mT
|
0.01 kg / 0.02 lbs
10.1 g / 0.1 N
|
weak grip |
Table 2: Slippage capacity (vertical surface)
MW 35x5 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
1.85 kg / 4.08 lbs
1850.0 g / 18.1 N
|
| 1 mm | Stal (~0.2) |
1.75 kg / 3.86 lbs
1752.0 g / 17.2 N
|
| 2 mm | Stal (~0.2) |
1.63 kg / 3.59 lbs
1630.0 g / 16.0 N
|
| 3 mm | Stal (~0.2) |
1.49 kg / 3.29 lbs
1494.0 g / 14.7 N
|
| 5 mm | Stal (~0.2) |
1.20 kg / 2.65 lbs
1202.0 g / 11.8 N
|
| 10 mm | Stal (~0.2) |
0.59 kg / 1.29 lbs
586.0 g / 5.7 N
|
| 15 mm | Stal (~0.2) |
0.25 kg / 0.56 lbs
254.0 g / 2.5 N
|
| 20 mm | Stal (~0.2) |
0.11 kg / 0.24 lbs
108.0 g / 1.1 N
|
| 30 mm | Stal (~0.2) |
0.02 kg / 0.05 lbs
24.0 g / 0.2 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
2.0 g / 0.0 N
|
Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MW 35x5 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
2.78 kg / 6.12 lbs
2775.0 g / 27.2 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
1.85 kg / 4.08 lbs
1850.0 g / 18.1 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.93 kg / 2.04 lbs
925.0 g / 9.1 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
4.63 kg / 10.20 lbs
4625.0 g / 45.4 N
|
Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 35x5 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.93 kg / 2.04 lbs
925.0 g / 9.1 N
|
| 1 mm |
|
2.31 kg / 5.10 lbs
2312.5 g / 22.7 N
|
| 2 mm |
|
4.63 kg / 10.20 lbs
4625.0 g / 45.4 N
|
| 3 mm |
|
6.94 kg / 15.29 lbs
6937.5 g / 68.1 N
|
| 5 mm |
|
9.25 kg / 20.39 lbs
9250.0 g / 90.7 N
|
| 10 mm |
|
9.25 kg / 20.39 lbs
9250.0 g / 90.7 N
|
| 11 mm |
|
9.25 kg / 20.39 lbs
9250.0 g / 90.7 N
|
| 12 mm |
|
9.25 kg / 20.39 lbs
9250.0 g / 90.7 N
|
Table 5: Thermal stability (stability) - thermal limit
MW 35x5 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
9.25 kg / 20.39 lbs
9250.0 g / 90.7 N
|
OK |
| 40 °C | -2.2% |
9.05 kg / 19.94 lbs
9046.5 g / 88.7 N
|
OK |
| 60 °C | -4.4% |
8.84 kg / 19.50 lbs
8843.0 g / 86.7 N
|
|
| 80 °C | -6.6% |
8.64 kg / 19.05 lbs
8639.5 g / 84.8 N
|
|
| 100 °C | -28.8% |
6.59 kg / 14.52 lbs
6586.0 g / 64.6 N
|
Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 35x5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
17.20 kg / 37.92 lbs
3 075 Gs
|
2.58 kg / 5.69 lbs
2580 g / 25.3 N
|
N/A |
| 1 mm |
16.78 kg / 36.99 lbs
3 364 Gs
|
2.52 kg / 5.55 lbs
2517 g / 24.7 N
|
15.10 kg / 33.29 lbs
~0 Gs
|
| 2 mm |
16.29 kg / 35.91 lbs
3 314 Gs
|
2.44 kg / 5.39 lbs
2443 g / 24.0 N
|
14.66 kg / 32.32 lbs
~0 Gs
|
| 3 mm |
15.75 kg / 34.71 lbs
3 259 Gs
|
2.36 kg / 5.21 lbs
2362 g / 23.2 N
|
14.17 kg / 31.24 lbs
~0 Gs
|
| 5 mm |
14.54 kg / 32.05 lbs
3 131 Gs
|
2.18 kg / 4.81 lbs
2180 g / 21.4 N
|
13.08 kg / 28.84 lbs
~0 Gs
|
| 10 mm |
11.18 kg / 24.64 lbs
2 746 Gs
|
1.68 kg / 3.70 lbs
1677 g / 16.4 N
|
10.06 kg / 22.18 lbs
~0 Gs
|
| 20 mm |
5.45 kg / 12.02 lbs
1 918 Gs
|
0.82 kg / 1.80 lbs
818 g / 8.0 N
|
4.91 kg / 10.82 lbs
~0 Gs
|
| 50 mm |
0.45 kg / 1.00 lbs
552 Gs
|
0.07 kg / 0.15 lbs
68 g / 0.7 N
|
0.41 kg / 0.90 lbs
~0 Gs
|
| 60 mm |
0.21 kg / 0.47 lbs
380 Gs
|
0.03 kg / 0.07 lbs
32 g / 0.3 N
|
0.19 kg / 0.42 lbs
~0 Gs
|
| 70 mm |
0.11 kg / 0.24 lbs
269 Gs
|
0.02 kg / 0.04 lbs
16 g / 0.2 N
|
0.10 kg / 0.21 lbs
~0 Gs
|
| 80 mm |
0.06 kg / 0.13 lbs
197 Gs
|
0.01 kg / 0.02 lbs
9 g / 0.1 N
|
0.05 kg / 0.11 lbs
~0 Gs
|
| 90 mm |
0.03 kg / 0.07 lbs
147 Gs
|
0.00 kg / 0.01 lbs
5 g / 0.0 N
|
0.03 kg / 0.06 lbs
~0 Gs
|
| 100 mm |
0.02 kg / 0.04 lbs
112 Gs
|
0.00 kg / 0.01 lbs
3 g / 0.0 N
|
0.02 kg / 0.04 lbs
~0 Gs
|
Table 7: Safety (HSE) (electronics) - warnings
MW 35x5 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 12.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 9.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 7.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 6.0 cm |
| Car key | 50 Gs (5.0 mT) | 5.5 cm |
| Payment card | 400 Gs (40.0 mT) | 2.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 2.0 cm |
Table 8: Impact energy (cracking risk) - warning
MW 35x5 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
19.08 km/h
(5.30 m/s)
|
0.51 J | |
| 30 mm |
28.19 km/h
(7.83 m/s)
|
1.11 J | |
| 50 mm |
36.13 km/h
(10.04 m/s)
|
1.82 J | |
| 100 mm |
51.07 km/h
(14.18 m/s)
|
3.63 J |
Table 9: Coating parameters (durability)
MW 35x5 / 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 35x5 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 20 291 Mx | 202.9 µWb |
| Pc Coefficient | 0.22 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MW 35x5 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 9.25 kg | Standard |
| Water (riverbed) |
10.59 kg
(+1.34 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Caution: On a vertical wall, the magnet holds only ~20% of its perpendicular strength.
2. Efficiency vs thickness
*Thin steel (e.g. 0.5mm PC case) severely weakens the holding force.
3. Temperature resistance
*For N38 grade, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.22
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.
Material specification
| 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 also products
Pros and cons of neodymium magnets.
Benefits
- They have constant strength, and over nearly 10 years their performance decreases symbolically – ~1% (in testing),
- They are resistant to demagnetization induced by presence of other magnetic fields,
- In other words, due to the aesthetic finish of nickel, the element becomes visually attractive,
- They are known for high magnetic induction at the operating surface, which increases their power,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
- Thanks to the ability of accurate forming and adaptation to unique solutions, magnetic components can be manufactured in a variety of shapes and sizes, which makes them more universal,
- Versatile presence in advanced technology sectors – they are used in computer drives, brushless drives, precision medical tools, also other advanced devices.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Limitations
- To avoid cracks under impact, we suggest using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
- Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape as well as 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 rust. Therefore when using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
- Limited ability of producing threads in the magnet and complex forms - preferred is a housing - magnetic holder.
- Possible danger to health – tiny shards of magnets pose a threat, if swallowed, which gains importance in the context of child health protection. Furthermore, small components of these products can complicate diagnosis medical in case of swallowing.
- With mass production the cost of neodymium magnets can be a barrier,
Holding force characteristics
Optimal lifting capacity of a neodymium magnet – what it depends on?
- with the application of a sheet made of low-carbon steel, ensuring full magnetic saturation
- possessing a massiveness of min. 10 mm to ensure full flux closure
- characterized by lack of roughness
- under conditions of no distance (metal-to-metal)
- for force acting at a right angle (in the magnet axis)
- at temperature approx. 20 degrees Celsius
Determinants of practical lifting force of a magnet
- Distance – existence of any layer (rust, dirt, gap) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
- Force direction – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity 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.
- Steel grade – the best choice is pure iron steel. Stainless steels may have worse magnetic properties.
- Smoothness – full contact is possible only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
- Heat – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).
Lifting capacity was determined with the use of a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, however under parallel forces the lifting capacity is smaller. Additionally, even a slight gap between the magnet and the plate reduces the holding force.
Safety rules for work with NdFeB magnets
Dust explosion hazard
Powder created during cutting of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.
Product not for children
NdFeB magnets are not intended for children. Swallowing several magnets may result in them connecting inside the digestive tract, which poses a severe health hazard and necessitates urgent medical intervention.
Pacemakers
Life threat: Neodymium magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.
Allergy Warning
Some people have a hypersensitivity to Ni, which is the standard coating for neodymium magnets. Prolonged contact may cause an allergic reaction. We suggest use safety gloves.
Impact on smartphones
A strong magnetic field interferes with the operation of compasses in phones and GPS navigation. Maintain magnets near a smartphone to prevent damaging the sensors.
Immense force
Before use, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.
Finger safety
Pinching hazard: The attraction force is so immense that it can cause blood blisters, crushing, and even bone fractures. Protective gloves are recommended.
Safe distance
Do not bring magnets close to a wallet, computer, or TV. The magnetic field can destroy these devices and erase data from cards.
Demagnetization risk
Standard neodymium magnets (grade N) undergo demagnetization when the temperature surpasses 80°C. This process is irreversible.
Protective goggles
Protect your eyes. Magnets can fracture upon violent connection, ejecting sharp fragments into the air. Eye protection is mandatory.
