MW 33x30 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010058
GTIN/EAN: 5906301810575
Diameter Ø
33 mm [±0,1 mm]
Height
30 mm [±0,1 mm]
Weight
192.44 g
Magnetization Direction
↑ axial
Load capacity
35.84 kg / 351.54 N
Magnetic Induction
543.05 mT / 5430 Gs
Coating
[NiCuNi] Nickel
52.89 ZŁ with VAT / pcs + price for transport
43.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical - MW 33x30 / N38 - cylindrical magnet
Specification / characteristics - MW 33x30 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010058 |
| GTIN/EAN | 5906301810575 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 33 mm [±0,1 mm] |
| Height | 30 mm [±0,1 mm] |
| Weight | 192.44 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 35.84 kg / 351.54 N |
| Magnetic Induction ~ ? | 543.05 mT / 5430 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 assembly - report
The following data represent the result of a engineering simulation. Values were calculated on models for the material Nd2Fe14B. Actual conditions might slightly deviate from the simulation results. Use these calculations as a reference point during assembly planning.
Table 1: Static force (pull vs distance) - power drop
MW 33x30 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
5429 Gs
542.9 mT
|
35.84 kg / 79.01 lbs
35840.0 g / 351.6 N
|
crushing |
| 1 mm |
5098 Gs
509.8 mT
|
31.60 kg / 69.67 lbs
31600.1 g / 310.0 N
|
crushing |
| 2 mm |
4765 Gs
476.5 mT
|
27.60 kg / 60.85 lbs
27601.7 g / 270.8 N
|
crushing |
| 3 mm |
4436 Gs
443.6 mT
|
23.93 kg / 52.76 lbs
23930.4 g / 234.8 N
|
crushing |
| 5 mm |
3810 Gs
381.0 mT
|
17.65 kg / 38.91 lbs
17650.2 g / 173.1 N
|
crushing |
| 10 mm |
2518 Gs
251.8 mT
|
7.71 kg / 17.00 lbs
7709.5 g / 75.6 N
|
medium risk |
| 15 mm |
1650 Gs
165.0 mT
|
3.31 kg / 7.30 lbs
3312.1 g / 32.5 N
|
medium risk |
| 20 mm |
1105 Gs
110.5 mT
|
1.49 kg / 3.27 lbs
1485.1 g / 14.6 N
|
weak grip |
| 30 mm |
546 Gs
54.6 mT
|
0.36 kg / 0.80 lbs
361.9 g / 3.5 N
|
weak grip |
| 50 mm |
184 Gs
18.4 mT
|
0.04 kg / 0.09 lbs
41.4 g / 0.4 N
|
weak grip |
Table 2: Shear load (vertical surface)
MW 33x30 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
7.17 kg / 15.80 lbs
7168.0 g / 70.3 N
|
| 1 mm | Stal (~0.2) |
6.32 kg / 13.93 lbs
6320.0 g / 62.0 N
|
| 2 mm | Stal (~0.2) |
5.52 kg / 12.17 lbs
5520.0 g / 54.2 N
|
| 3 mm | Stal (~0.2) |
4.79 kg / 10.55 lbs
4786.0 g / 47.0 N
|
| 5 mm | Stal (~0.2) |
3.53 kg / 7.78 lbs
3530.0 g / 34.6 N
|
| 10 mm | Stal (~0.2) |
1.54 kg / 3.40 lbs
1542.0 g / 15.1 N
|
| 15 mm | Stal (~0.2) |
0.66 kg / 1.46 lbs
662.0 g / 6.5 N
|
| 20 mm | Stal (~0.2) |
0.30 kg / 0.66 lbs
298.0 g / 2.9 N
|
| 30 mm | Stal (~0.2) |
0.07 kg / 0.16 lbs
72.0 g / 0.7 N
|
| 50 mm | Stal (~0.2) |
0.01 kg / 0.02 lbs
8.0 g / 0.1 N
|
Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 33x30 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
10.75 kg / 23.70 lbs
10752.0 g / 105.5 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
7.17 kg / 15.80 lbs
7168.0 g / 70.3 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
3.58 kg / 7.90 lbs
3584.0 g / 35.2 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
17.92 kg / 39.51 lbs
17920.0 g / 175.8 N
|
Table 4: Steel thickness (substrate influence) - power losses
MW 33x30 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
1.79 kg / 3.95 lbs
1792.0 g / 17.6 N
|
| 1 mm |
|
4.48 kg / 9.88 lbs
4480.0 g / 43.9 N
|
| 2 mm |
|
8.96 kg / 19.75 lbs
8960.0 g / 87.9 N
|
| 3 mm |
|
13.44 kg / 29.63 lbs
13440.0 g / 131.8 N
|
| 5 mm |
|
22.40 kg / 49.38 lbs
22400.0 g / 219.7 N
|
| 10 mm |
|
35.84 kg / 79.01 lbs
35840.0 g / 351.6 N
|
| 11 mm |
|
35.84 kg / 79.01 lbs
35840.0 g / 351.6 N
|
| 12 mm |
|
35.84 kg / 79.01 lbs
35840.0 g / 351.6 N
|
Table 5: Working in heat (stability) - resistance threshold
MW 33x30 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
35.84 kg / 79.01 lbs
35840.0 g / 351.6 N
|
OK |
| 40 °C | -2.2% |
35.05 kg / 77.28 lbs
35051.5 g / 343.9 N
|
OK |
| 60 °C | -4.4% |
34.26 kg / 75.54 lbs
34263.0 g / 336.1 N
|
OK |
| 80 °C | -6.6% |
33.47 kg / 73.80 lbs
33474.6 g / 328.4 N
|
|
| 100 °C | -28.8% |
25.52 kg / 56.26 lbs
25518.1 g / 250.3 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 33x30 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
155.43 kg / 342.66 lbs
5 974 Gs
|
23.31 kg / 51.40 lbs
23314 g / 228.7 N
|
N/A |
| 1 mm |
146.19 kg / 322.29 lbs
10 531 Gs
|
21.93 kg / 48.34 lbs
21928 g / 215.1 N
|
131.57 kg / 290.06 lbs
~0 Gs
|
| 2 mm |
137.04 kg / 302.12 lbs
10 196 Gs
|
20.56 kg / 45.32 lbs
20556 g / 201.7 N
|
123.34 kg / 271.91 lbs
~0 Gs
|
| 3 mm |
128.20 kg / 282.64 lbs
9 862 Gs
|
19.23 kg / 42.40 lbs
19230 g / 188.6 N
|
115.38 kg / 254.37 lbs
~0 Gs
|
| 5 mm |
111.55 kg / 245.93 lbs
9 199 Gs
|
16.73 kg / 36.89 lbs
16733 g / 164.2 N
|
100.40 kg / 221.34 lbs
~0 Gs
|
| 10 mm |
76.54 kg / 168.75 lbs
7 620 Gs
|
11.48 kg / 25.31 lbs
11481 g / 112.6 N
|
68.89 kg / 151.87 lbs
~0 Gs
|
| 20 mm |
33.43 kg / 73.71 lbs
5 036 Gs
|
5.02 kg / 11.06 lbs
5015 g / 49.2 N
|
30.09 kg / 66.34 lbs
~0 Gs
|
| 50 mm |
3.08 kg / 6.78 lbs
1 528 Gs
|
0.46 kg / 1.02 lbs
462 g / 4.5 N
|
2.77 kg / 6.11 lbs
~0 Gs
|
| 60 mm |
1.57 kg / 3.46 lbs
1 091 Gs
|
0.24 kg / 0.52 lbs
235 g / 2.3 N
|
1.41 kg / 3.11 lbs
~0 Gs
|
| 70 mm |
0.85 kg / 1.87 lbs
803 Gs
|
0.13 kg / 0.28 lbs
127 g / 1.2 N
|
0.76 kg / 1.69 lbs
~0 Gs
|
| 80 mm |
0.48 kg / 1.07 lbs
606 Gs
|
0.07 kg / 0.16 lbs
73 g / 0.7 N
|
0.44 kg / 0.96 lbs
~0 Gs
|
| 90 mm |
0.29 kg / 0.64 lbs
468 Gs
|
0.04 kg / 0.10 lbs
43 g / 0.4 N
|
0.26 kg / 0.57 lbs
~0 Gs
|
| 100 mm |
0.18 kg / 0.40 lbs
369 Gs
|
0.03 kg / 0.06 lbs
27 g / 0.3 N
|
0.16 kg / 0.36 lbs
~0 Gs
|
Table 7: Safety (HSE) (electronics) - precautionary measures
MW 33x30 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 20.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 16.0 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 12.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 9.5 cm |
| Car key | 50 Gs (5.0 mT) | 9.0 cm |
| Payment card | 400 Gs (40.0 mT) | 4.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 3.0 cm |
Table 8: Impact energy (kinetic energy) - warning
MW 33x30 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
15.50 km/h
(4.31 m/s)
|
1.78 J | |
| 30 mm |
23.99 km/h
(6.66 m/s)
|
4.27 J | |
| 50 mm |
30.80 km/h
(8.55 m/s)
|
7.04 J | |
| 100 mm |
43.52 km/h
(12.09 m/s)
|
14.06 J |
Table 9: Coating parameters (durability)
MW 33x30 / 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 33x30 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 47 447 Mx | 474.5 µWb |
| Pc Coefficient | 0.85 | High (Stable) |
Table 11: Hydrostatics and buoyancy
MW 33x30 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 35.84 kg | Standard |
| Water (riverbed) |
41.04 kg
(+5.20 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Note: On a vertical wall, the magnet retains only approx. 20-30% of its perpendicular strength.
2. Steel thickness impact
*Thin metal sheet (e.g. 0.5mm PC case) severely reduces the holding force.
3. Heat tolerance
*For N38 material, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.85
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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other proposals
Advantages and disadvantages of rare earth magnets.
Strengths
- They do not lose strength, even over approximately ten years – the reduction in power is only ~1% (theoretically),
- They have excellent resistance to weakening of magnetic properties due to external fields,
- The use of an refined layer of noble metals (nickel, gold, silver) causes the element to have aesthetics,
- The surface of neodymium magnets generates a strong magnetic field – this is a distinguishing feature,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Considering the option of accurate molding and adaptation to custom requirements, neodymium magnets can be created in a wide range of geometric configurations, which makes them more universal,
- Universal use in future technologies – they serve a role in HDD drives, drive modules, diagnostic systems, as well as modern systems.
- Thanks to concentrated force, small magnets offer high operating force, in miniature format,
Disadvantages
- Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a strong case, which not only protects them against impacts but also increases their durability
- Neodymium magnets decrease their force 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 stability even at temperatures up to 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
- Limited ability of creating threads in the magnet and complex shapes - preferred is cover - magnetic holder.
- Possible danger related to microscopic parts of magnets pose a threat, if swallowed, which gains importance in the context of child health protection. Additionally, small components of these magnets can be problematic in diagnostics medical when they are in the body.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities
Lifting parameters
Best holding force of the magnet in ideal parameters – what contributes to it?
- using a sheet made of mild steel, functioning as a circuit closing element
- with a cross-section minimum 10 mm
- with an polished contact surface
- with zero gap (without coatings)
- for force applied at a right angle (pull-off, not shear)
- in neutral thermal conditions
What influences lifting capacity in practice
- Clearance – the presence of foreign body (rust, dirt, gap) acts as an insulator, which reduces capacity rapidly (even by 50% at 0.5 mm).
- Load vector – highest force is available only during perpendicular pulling. The resistance to sliding of the magnet along the surface is typically several times lower (approx. 1/5 of the lifting capacity).
- Steel thickness – insufficiently thick steel does not close the flux, causing part of the power to be wasted into the air.
- Metal type – not every steel reacts the same. High carbon content weaken the attraction effect.
- Plate texture – smooth surfaces guarantee perfect abutment, which increases force. Rough surfaces weaken the grip.
- 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 testing was carried out on a smooth plate of optimal thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the load capacity is reduced by as much as 75%. Additionally, even a minimal clearance between the magnet’s surface and the plate reduces the holding force.
Safe handling of neodymium magnets
Impact on smartphones
Be aware: neodymium magnets produce a field that confuses precision electronics. Keep a separation from your mobile, device, and navigation systems.
Keep away from computers
Do not bring magnets near a wallet, laptop, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.
Allergy Warning
Studies show that nickel (the usual finish) is a strong allergen. If you have an allergy, prevent touching magnets with bare hands or opt for versions in plastic housing.
Maximum temperature
Avoid heat. Neodymium magnets are susceptible to temperature. If you need operation above 80°C, look for HT versions (H, SH, UH).
Material brittleness
Watch out for shards. Magnets can fracture upon violent connection, ejecting shards into the air. Eye protection is mandatory.
Safe operation
Before use, read the rules. Sudden snapping can break the magnet or injure your hand. Be predictive.
Implant safety
For implant holders: Strong magnetic fields affect electronics. Maintain minimum 30 cm distance or ask another person to handle the magnets.
Do not drill into magnets
Drilling and cutting of NdFeB material carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.
Crushing force
Pinching hazard: The attraction force is so immense that it can result in blood blisters, pinching, and even bone fractures. Use thick gloves.
Do not give to children
Absolutely keep magnets out of reach of children. Risk of swallowing is high, and the consequences of magnets connecting inside the body are very dangerous.
