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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Product card - 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 |
Physical simulation of the product - report
These values constitute the result of a engineering analysis. Results rely on models for the class Nd2Fe14B. Actual conditions might slightly differ from theoretical values. Treat these data as a reference point during assembly planning.
Table 1: Static force (force vs gap) - interaction chart
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 pounds
35840.0 g / 351.6 N
|
crushing |
| 1 mm |
5098 Gs
509.8 mT
|
31.60 kg / 69.67 pounds
31600.1 g / 310.0 N
|
crushing |
| 2 mm |
4765 Gs
476.5 mT
|
27.60 kg / 60.85 pounds
27601.7 g / 270.8 N
|
crushing |
| 3 mm |
4436 Gs
443.6 mT
|
23.93 kg / 52.76 pounds
23930.4 g / 234.8 N
|
crushing |
| 5 mm |
3810 Gs
381.0 mT
|
17.65 kg / 38.91 pounds
17650.2 g / 173.1 N
|
crushing |
| 10 mm |
2518 Gs
251.8 mT
|
7.71 kg / 17.00 pounds
7709.5 g / 75.6 N
|
medium risk |
| 15 mm |
1650 Gs
165.0 mT
|
3.31 kg / 7.30 pounds
3312.1 g / 32.5 N
|
medium risk |
| 20 mm |
1105 Gs
110.5 mT
|
1.49 kg / 3.27 pounds
1485.1 g / 14.6 N
|
weak grip |
| 30 mm |
546 Gs
54.6 mT
|
0.36 kg / 0.80 pounds
361.9 g / 3.5 N
|
weak grip |
| 50 mm |
184 Gs
18.4 mT
|
0.04 kg / 0.09 pounds
41.4 g / 0.4 N
|
weak grip |
Table 2: Slippage load (wall)
MW 33x30 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
7.17 kg / 15.80 pounds
7168.0 g / 70.3 N
|
| 1 mm | Stal (~0.2) |
6.32 kg / 13.93 pounds
6320.0 g / 62.0 N
|
| 2 mm | Stal (~0.2) |
5.52 kg / 12.17 pounds
5520.0 g / 54.2 N
|
| 3 mm | Stal (~0.2) |
4.79 kg / 10.55 pounds
4786.0 g / 47.0 N
|
| 5 mm | Stal (~0.2) |
3.53 kg / 7.78 pounds
3530.0 g / 34.6 N
|
| 10 mm | Stal (~0.2) |
1.54 kg / 3.40 pounds
1542.0 g / 15.1 N
|
| 15 mm | Stal (~0.2) |
0.66 kg / 1.46 pounds
662.0 g / 6.5 N
|
| 20 mm | Stal (~0.2) |
0.30 kg / 0.66 pounds
298.0 g / 2.9 N
|
| 30 mm | Stal (~0.2) |
0.07 kg / 0.16 pounds
72.0 g / 0.7 N
|
| 50 mm | Stal (~0.2) |
0.01 kg / 0.02 pounds
8.0 g / 0.1 N
|
Table 3: Wall mounting (shearing) - vertical pull
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 pounds
10752.0 g / 105.5 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
7.17 kg / 15.80 pounds
7168.0 g / 70.3 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
3.58 kg / 7.90 pounds
3584.0 g / 35.2 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
17.92 kg / 39.51 pounds
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 pounds
1792.0 g / 17.6 N
|
| 1 mm |
|
4.48 kg / 9.88 pounds
4480.0 g / 43.9 N
|
| 2 mm |
|
8.96 kg / 19.75 pounds
8960.0 g / 87.9 N
|
| 3 mm |
|
13.44 kg / 29.63 pounds
13440.0 g / 131.8 N
|
| 5 mm |
|
22.40 kg / 49.38 pounds
22400.0 g / 219.7 N
|
| 10 mm |
|
35.84 kg / 79.01 pounds
35840.0 g / 351.6 N
|
| 11 mm |
|
35.84 kg / 79.01 pounds
35840.0 g / 351.6 N
|
| 12 mm |
|
35.84 kg / 79.01 pounds
35840.0 g / 351.6 N
|
Table 5: Thermal resistance (stability) - thermal limit
MW 33x30 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
35.84 kg / 79.01 pounds
35840.0 g / 351.6 N
|
OK |
| 40 °C | -2.2% |
35.05 kg / 77.28 pounds
35051.5 g / 343.9 N
|
OK |
| 60 °C | -4.4% |
34.26 kg / 75.54 pounds
34263.0 g / 336.1 N
|
OK |
| 80 °C | -6.6% |
33.47 kg / 73.80 pounds
33474.6 g / 328.4 N
|
|
| 100 °C | -28.8% |
25.52 kg / 56.26 pounds
25518.1 g / 250.3 N
|
Table 6: Two magnets (attraction) - field collision
MW 33x30 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
155.43 kg / 342.66 pounds
5 974 Gs
|
23.31 kg / 51.40 pounds
23314 g / 228.7 N
|
N/A |
| 1 mm |
146.19 kg / 322.29 pounds
10 531 Gs
|
21.93 kg / 48.34 pounds
21928 g / 215.1 N
|
131.57 kg / 290.06 pounds
~0 Gs
|
| 2 mm |
137.04 kg / 302.12 pounds
10 196 Gs
|
20.56 kg / 45.32 pounds
20556 g / 201.7 N
|
123.34 kg / 271.91 pounds
~0 Gs
|
| 3 mm |
128.20 kg / 282.64 pounds
9 862 Gs
|
19.23 kg / 42.40 pounds
19230 g / 188.6 N
|
115.38 kg / 254.37 pounds
~0 Gs
|
| 5 mm |
111.55 kg / 245.93 pounds
9 199 Gs
|
16.73 kg / 36.89 pounds
16733 g / 164.2 N
|
100.40 kg / 221.34 pounds
~0 Gs
|
| 10 mm |
76.54 kg / 168.75 pounds
7 620 Gs
|
11.48 kg / 25.31 pounds
11481 g / 112.6 N
|
68.89 kg / 151.87 pounds
~0 Gs
|
| 20 mm |
33.43 kg / 73.71 pounds
5 036 Gs
|
5.02 kg / 11.06 pounds
5015 g / 49.2 N
|
30.09 kg / 66.34 pounds
~0 Gs
|
| 50 mm |
3.08 kg / 6.78 pounds
1 528 Gs
|
0.46 kg / 1.02 pounds
462 g / 4.5 N
|
2.77 kg / 6.11 pounds
~0 Gs
|
| 60 mm |
1.57 kg / 3.46 pounds
1 091 Gs
|
0.24 kg / 0.52 pounds
235 g / 2.3 N
|
1.41 kg / 3.11 pounds
~0 Gs
|
| 70 mm |
0.85 kg / 1.87 pounds
803 Gs
|
0.13 kg / 0.28 pounds
127 g / 1.2 N
|
0.76 kg / 1.69 pounds
~0 Gs
|
| 80 mm |
0.48 kg / 1.07 pounds
606 Gs
|
0.07 kg / 0.16 pounds
73 g / 0.7 N
|
0.44 kg / 0.96 pounds
~0 Gs
|
| 90 mm |
0.29 kg / 0.64 pounds
468 Gs
|
0.04 kg / 0.10 pounds
43 g / 0.4 N
|
0.26 kg / 0.57 pounds
~0 Gs
|
| 100 mm |
0.18 kg / 0.40 pounds
369 Gs
|
0.03 kg / 0.06 pounds
27 g / 0.3 N
|
0.16 kg / 0.36 pounds
~0 Gs
|
Table 7: Safety (HSE) (implants) - warnings
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 |
| Timepiece | 20 Gs (2.0 mT) | 12.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 9.5 cm |
| Remote | 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: Dynamics (kinetic energy) - collision effects
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: Corrosion resistance
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: Electrical data (Flux)
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. Sliding resistance
*Note: On a vertical surface, the magnet holds merely approx. 20-30% of its max power.
2. Efficiency vs thickness
*Thin metal sheet (e.g. 0.5mm PC case) severely weakens the holding force.
3. Heat tolerance
*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) = 0.85
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.
Elemental analysis
| 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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other products
Advantages as well as disadvantages of Nd2Fe14B magnets.
Pros
- They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (according to literature),
- They feature excellent resistance to magnetic field loss when exposed to external fields,
- In other words, due to the shiny layer of nickel, the element is aesthetically pleasing,
- Magnetic induction on the surface of the magnet is exceptional,
- 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...
- Possibility of detailed forming as well as modifying to concrete conditions,
- Key role in innovative solutions – they are commonly used in computer drives, electromotive mechanisms, diagnostic systems, and technologically advanced constructions.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Weaknesses
- They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only protects the magnet but also improves its resistance to damage
- Neodymium magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape and 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
- When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
- Due to limitations in producing threads and complicated shapes in magnets, we propose using a housing - magnetic mechanism.
- Health risk related to microscopic parts of magnets can be dangerous, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Furthermore, small components of these devices are able to disrupt the diagnostic process medical after entering the body.
- With large orders the cost of neodymium magnets can be a barrier,
Pull force analysis
Maximum lifting force for a neodymium magnet – what it depends on?
- on a block made of mild steel, effectively closing the magnetic flux
- possessing a massiveness of at least 10 mm to ensure full flux closure
- characterized by smoothness
- under conditions of gap-free contact (metal-to-metal)
- for force acting at a right angle (pull-off, not shear)
- at conditions approx. 20°C
What influences lifting capacity in practice
- Clearance – existence of foreign body (rust, dirt, gap) interrupts the magnetic circuit, which lowers capacity steeply (even by 50% at 0.5 mm).
- Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
- Base massiveness – too thin steel causes magnetic saturation, causing part of the power to be lost into the air.
- Material composition – not every steel reacts the same. High carbon content weaken the interaction with the magnet.
- Smoothness – ideal contact is possible only on polished steel. Any scratches and bumps create air cushions, reducing force.
- Thermal conditions – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and in frost gain strength (up to a certain limit).
Lifting capacity was measured using a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, in contrast under attempts to slide the magnet the holding force is lower. Moreover, even a small distance between the magnet’s surface and the plate lowers the load capacity.
Safe handling of neodymium magnets
Metal Allergy
Some people suffer from a contact allergy to Ni, which is the standard coating for NdFeB magnets. Prolonged contact might lead to dermatitis. We suggest wear protective gloves.
ICD Warning
Health Alert: Neodymium magnets can deactivate heart devices and defibrillators. Stay away if you have electronic implants.
Flammability
Fire warning: Rare earth powder is explosive. Avoid machining magnets in home conditions as this risks ignition.
GPS and phone interference
Navigation devices and smartphones are highly sensitive to magnetic fields. Close proximity with a strong magnet can ruin the internal compass in your phone.
Do not underestimate power
Be careful. Rare earth magnets act from a long distance and connect with massive power, often faster than you can move away.
No play value
Strictly keep magnets out of reach of children. Risk of swallowing is significant, and the effects of magnets connecting inside the body are tragic.
Safe distance
Do not bring magnets near a wallet, computer, or screen. The magnetic field can irreversibly ruin these devices and wipe information from cards.
Shattering risk
Neodymium magnets are ceramic materials, meaning they are very brittle. Impact of two magnets leads to them breaking into shards.
Hand protection
Protect your hands. Two powerful magnets will snap together immediately with a force of several hundred kilograms, crushing anything in their path. Exercise extreme caution!
Demagnetization risk
Standard neodymium magnets (N-type) undergo demagnetization when the temperature surpasses 80°C. The loss of strength is permanent.
