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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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Technical - 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

Engineering modeling of the magnet - report

These data constitute the result of a engineering simulation. Values rely on algorithms for the material Nd2Fe14B. Actual parameters might slightly differ from theoretical values. Use these data as a reference point for designers.

Table 1: Static pull 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 pounds
35840.0 g / 351.6 N
critical level
1 mm 5098 Gs
509.8 mT
31.60 kg / 69.67 pounds
31600.1 g / 310.0 N
critical level
2 mm 4765 Gs
476.5 mT
27.60 kg / 60.85 pounds
27601.7 g / 270.8 N
critical level
3 mm 4436 Gs
443.6 mT
23.93 kg / 52.76 pounds
23930.4 g / 234.8 N
critical level
5 mm 3810 Gs
381.0 mT
17.65 kg / 38.91 pounds
17650.2 g / 173.1 N
critical level
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
low risk
30 mm 546 Gs
54.6 mT
0.36 kg / 0.80 pounds
361.9 g / 3.5 N
low risk
50 mm 184 Gs
18.4 mT
0.04 kg / 0.09 pounds
41.4 g / 0.4 N
low risk

Table 2: Vertical hold (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 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) - 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 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: Material efficiency (substrate influence) - sheet metal selection
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: Working in heat (material behavior) - 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 (repulsion) - field range
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: Protective zones (implants) - 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
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 (cracking risk) - 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: Anti-corrosion coating 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: Underwater work (magnet fishing)
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%
Corrosion 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

*Caution: On a vertical surface, the magnet retains only a fraction of its nominal pull.

2. Steel saturation

*Thin metal sheet (e.g. computer case) drastically reduces the holding force.

3. Temperature resistance

*For N38 grade, 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.

Technical specification and ecology
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%
Ecology and recycling (GPSR)
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
Quick Unit Converter
Force (pull)

Field Strength

See also deals

This product is an exceptionally strong cylinder magnet, made from modern NdFeB material, which, at dimensions of Ø33x30 mm, guarantees optimal power. The MW 33x30 / N38 component is characterized by an accuracy of ±0.1mm and professional build quality, making it an excellent solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 35.84 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring lightning-fast order fulfillment. Additionally, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
It finds application in modeling, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 351.54 N with a weight of only 192.44 g, this rod is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a tolerance of ±0.1mm, the best method is to glue them into holes with a slightly larger diameter (e.g., 33.1 mm) using two-component epoxy glues. To ensure stability in automation, specialized industrial adhesives are used, which are safe for nickel 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 in continuous sale in our store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 33 mm and height 30 mm. 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.
Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 33 mm. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized through the diameter if your project requires it.

Pros as well as cons of neodymium magnets.

Benefits

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • They have constant strength, and over around ten years their performance decreases symbolically – ~1% (in testing),
  • They retain their magnetic properties even under strong external field,
  • Thanks to the smooth finish, the coating of nickel, gold-plated, or silver-plated gives an elegant appearance,
  • They show high magnetic induction at the operating surface, which affects their effectiveness,
  • 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 modularity in constructing and the capacity to adapt to specific needs,
  • Versatile presence in modern technologies – they are utilized in HDD drives, electromotive mechanisms, medical equipment, as well as complex engineering applications.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages

Characteristics of disadvantages of neodymium magnets and proposals for their use:
  • Brittleness is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a steel housing, which not only protects them against impacts but also raises their durability
  • Neodymium magnets decrease their strength 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
  • 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 prevent oxidation as well as corrosion.
  • Limited ability of producing threads in the magnet and complicated shapes - recommended is casing - magnetic holder.
  • Potential hazard related to microscopic parts of magnets are risky, in case of ingestion, which is particularly important in the context of child health protection. Furthermore, small components of these products are able to be problematic in diagnostics medical when they are in the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Pull force analysis

Maximum lifting capacity of the magnetwhat it depends on?

The lifting capacity listed is a theoretical maximum value conducted under standard conditions:
  • on a plate made of structural steel, effectively closing the magnetic flux
  • with a cross-section minimum 10 mm
  • with a plane perfectly flat
  • without any air gap between the magnet and steel
  • under perpendicular application of breakaway force (90-degree angle)
  • in temp. approx. 20°C

What influences lifting capacity in practice

Bear in mind that the application force may be lower depending on the following factors, in order of importance:
  • Gap between surfaces – every millimeter of distance (caused e.g. by veneer or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Angle of force application – maximum parameter is reached only during pulling at a 90° angle. The force required to slide of the magnet along the surface is typically several times lower (approx. 1/5 of the lifting capacity).
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
  • Plate material – mild steel gives the best results. Alloy admixtures lower magnetic permeability and holding force.
  • Smoothness – ideal contact is possible only on smooth steel. Any scratches and bumps create air cushions, weakening the magnet.
  • Temperature influence – hot environment weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.

Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet and the plate decreases the load capacity.

Precautions when working with neodymium magnets
Flammability

Fire warning: Rare earth powder is highly flammable. Do not process magnets in home conditions as this risks ignition.

Safe distance

Intense magnetic fields can destroy records on credit cards, hard drives, and other magnetic media. Keep a distance of min. 10 cm.

Medical interference

Patients with a pacemaker should keep an absolute distance from magnets. The magnetic field can disrupt the operation of the life-saving device.

Maximum temperature

Standard neodymium magnets (N-type) lose power when the temperature goes above 80°C. Damage is permanent.

GPS Danger

GPS units and smartphones are extremely sensitive to magnetic fields. Close proximity with a strong magnet can decalibrate the internal compass in your phone.

Avoid contact if allergic

A percentage of the population have a contact allergy to Ni, which is the typical protective layer for NdFeB magnets. Extended handling might lead to dermatitis. It is best to wear protective gloves.

Crushing risk

Risk of injury: The pulling power is so immense that it can result in hematomas, crushing, and even bone fractures. Protective gloves are recommended.

Danger to the youngest

Absolutely keep magnets out of reach of children. Choking hazard is significant, and the consequences of magnets clamping inside the body are life-threatening.

Safe operation

Exercise caution. Rare earth magnets act from a long distance and snap with huge force, often quicker than you can move away.

Beware of splinters

Protect your eyes. Magnets can explode upon uncontrolled impact, launching shards into the air. Eye protection is mandatory.

Warning! Need more info? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98