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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 with VAT / pcs + price for transport

43.00 ZŁ net + 23% VAT / pcs

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Product card - MW 33x30 / N38 - cylindrical magnet

Specification / characteristics - MW 33x30 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010058
GTIN/EAN 5906301810575
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
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

Specification / characteristics MW 33x30 / N38 - cylindrical magnet
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

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
5%
1.79 kg / 3.95 pounds
1792.0 g / 17.6 N
1 mm
13%
4.48 kg / 9.88 pounds
4480.0 g / 43.9 N
2 mm
25%
8.96 kg / 19.75 pounds
8960.0 g / 87.9 N
3 mm
38%
13.44 kg / 29.63 pounds
13440.0 g / 131.8 N
5 mm
63%
22.40 kg / 49.38 pounds
22400.0 g / 219.7 N
10 mm
100%
35.84 kg / 79.01 pounds
35840.0 g / 351.6 N
11 mm
100%
35.84 kg / 79.01 pounds
35840.0 g / 351.6 N
12 mm
100%
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%
Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
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.

Engineering data and GPSR
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
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 010058-2026
Measurement Calculator
Pulling force

Magnetic Field

Other products

This product is an exceptionally strong rod magnet, produced from durable NdFeB material, which, at dimensions of Ø33x30 mm, guarantees optimal power. This specific item features an accuracy of ±0.1mm and professional build quality, making it an ideal solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 35.84 kg), this product is in stock from our European logistics center, ensuring quick order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is ideal for building electric motors, advanced sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the high power of 351.54 N with a weight of only 192.44 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure stability in industry, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Magnets NdFeB grade N38 are suitable for 90% of applications in automation and machine building, where excessive miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø33x30), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.
This model is characterized by dimensions Ø33x30 mm, which, at a weight of 192.44 g, makes it an element with impressive magnetic energy density. The value of 351.54 N means that the magnet is capable of holding a weight many times exceeding its own mass of 192.44 g. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 30 mm), which means that the N and S poles are located on the flat, circular surfaces. Such an arrangement is most desirable when connecting magnets in stacks (e.g., in filters) or when mounting in sockets at the bottom of a hole. On request, we can also produce versions magnetized through the diameter if your project requires it.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Pros

Apart from their superior power, neodymium magnets have these key benefits:
  • 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

Cons of neodymium magnets and ways of using them
  • 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?

Breakaway force is the result of a measurement for the most favorable conditions, assuming:
  • 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

Effective lifting capacity is affected by specific conditions, such as (from most important):
  • 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.

Attention! Details about hazards in the article: Magnet Safety Guide.