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MW 33x10 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010057

GTIN/EAN: 5906301810568

5.00

Diameter Ø

33 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

64.15 g

Magnetization Direction

↑ axial

Load capacity

23.67 kg / 232.15 N

Magnetic Induction

321.26 mT / 3213 Gs

Coating

[NiCuNi] Nickel

26.52 with VAT / pcs + price for transport

21.56 ZŁ net + 23% VAT / pcs

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Product card - MW 33x10 / N38 - cylindrical magnet

Specification / characteristics - MW 33x10 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010057
GTIN/EAN 5906301810568
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 10 mm [±0,1 mm]
Weight 64.15 g
Magnetization Direction ↑ axial
Load capacity ~ ? 23.67 kg / 232.15 N
Magnetic Induction ~ ? 321.26 mT / 3213 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 33x10 / 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 analysis of the magnet - data

The following data constitute the result of a physical calculation. Values were calculated on algorithms for the class Nd2Fe14B. Actual performance might slightly deviate from the simulation results. Treat these data as a reference point when designing systems.

Table 1: Static pull force (force vs gap) - power drop
MW 33x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3212 Gs
321.2 mT
23.67 kg / 52.18 LBS
23670.0 g / 232.2 N
crushing
1 mm 3064 Gs
306.4 mT
21.54 kg / 47.49 LBS
21539.1 g / 211.3 N
crushing
2 mm 2901 Gs
290.1 mT
19.30 kg / 42.55 LBS
19302.3 g / 189.4 N
crushing
3 mm 2728 Gs
272.8 mT
17.07 kg / 37.64 LBS
17072.3 g / 167.5 N
crushing
5 mm 2373 Gs
237.3 mT
12.91 kg / 28.47 LBS
12913.7 g / 126.7 N
crushing
10 mm 1569 Gs
156.9 mT
5.65 kg / 12.45 LBS
5648.1 g / 55.4 N
strong
15 mm 1004 Gs
100.4 mT
2.31 kg / 5.10 LBS
2312.6 g / 22.7 N
strong
20 mm 650 Gs
65.0 mT
0.97 kg / 2.14 LBS
969.4 g / 9.5 N
weak grip
30 mm 299 Gs
29.9 mT
0.21 kg / 0.45 LBS
205.1 g / 2.0 N
weak grip
50 mm 90 Gs
9.0 mT
0.02 kg / 0.04 LBS
18.7 g / 0.2 N
weak grip

Table 2: Sliding load (vertical surface)
MW 33x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 4.73 kg / 10.44 LBS
4734.0 g / 46.4 N
1 mm Stal (~0.2) 4.31 kg / 9.50 LBS
4308.0 g / 42.3 N
2 mm Stal (~0.2) 3.86 kg / 8.51 LBS
3860.0 g / 37.9 N
3 mm Stal (~0.2) 3.41 kg / 7.53 LBS
3414.0 g / 33.5 N
5 mm Stal (~0.2) 2.58 kg / 5.69 LBS
2582.0 g / 25.3 N
10 mm Stal (~0.2) 1.13 kg / 2.49 LBS
1130.0 g / 11.1 N
15 mm Stal (~0.2) 0.46 kg / 1.02 LBS
462.0 g / 4.5 N
20 mm Stal (~0.2) 0.19 kg / 0.43 LBS
194.0 g / 1.9 N
30 mm Stal (~0.2) 0.04 kg / 0.09 LBS
42.0 g / 0.4 N
50 mm Stal (~0.2) 0.00 kg / 0.01 LBS
4.0 g / 0.0 N

Table 3: Vertical assembly (shearing) - vertical pull
MW 33x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
7.10 kg / 15.66 LBS
7101.0 g / 69.7 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
4.73 kg / 10.44 LBS
4734.0 g / 46.4 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
2.37 kg / 5.22 LBS
2367.0 g / 23.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
11.84 kg / 26.09 LBS
11835.0 g / 116.1 N

Table 4: Steel thickness (substrate influence) - power losses
MW 33x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
1.18 kg / 2.61 LBS
1183.5 g / 11.6 N
1 mm
13%
2.96 kg / 6.52 LBS
2958.8 g / 29.0 N
2 mm
25%
5.92 kg / 13.05 LBS
5917.5 g / 58.1 N
3 mm
38%
8.88 kg / 19.57 LBS
8876.3 g / 87.1 N
5 mm
63%
14.79 kg / 32.61 LBS
14793.8 g / 145.1 N
10 mm
100%
23.67 kg / 52.18 LBS
23670.0 g / 232.2 N
11 mm
100%
23.67 kg / 52.18 LBS
23670.0 g / 232.2 N
12 mm
100%
23.67 kg / 52.18 LBS
23670.0 g / 232.2 N

Table 5: Thermal resistance (stability) - thermal limit
MW 33x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 23.67 kg / 52.18 LBS
23670.0 g / 232.2 N
OK
40 °C -2.2% 23.15 kg / 51.04 LBS
23149.3 g / 227.1 N
OK
60 °C -4.4% 22.63 kg / 49.89 LBS
22628.5 g / 222.0 N
80 °C -6.6% 22.11 kg / 48.74 LBS
22107.8 g / 216.9 N
100 °C -28.8% 16.85 kg / 37.15 LBS
16853.0 g / 165.3 N

Table 6: Two magnets (repulsion) - forces in the system
MW 33x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 54.40 kg / 119.94 LBS
4 780 Gs
8.16 kg / 17.99 LBS
8160 g / 80.1 N
N/A
1 mm 52.02 kg / 114.68 LBS
6 282 Gs
7.80 kg / 17.20 LBS
7803 g / 76.5 N
46.82 kg / 103.21 LBS
~0 Gs
2 mm 49.51 kg / 109.14 LBS
6 128 Gs
7.43 kg / 16.37 LBS
7426 g / 72.8 N
44.55 kg / 98.23 LBS
~0 Gs
3 mm 46.95 kg / 103.50 LBS
5 968 Gs
7.04 kg / 15.52 LBS
7042 g / 69.1 N
42.25 kg / 93.15 LBS
~0 Gs
5 mm 41.79 kg / 92.13 LBS
5 630 Gs
6.27 kg / 13.82 LBS
6268 g / 61.5 N
37.61 kg / 82.91 LBS
~0 Gs
10 mm 29.68 kg / 65.43 LBS
4 745 Gs
4.45 kg / 9.82 LBS
4452 g / 43.7 N
26.71 kg / 58.89 LBS
~0 Gs
20 mm 12.98 kg / 28.62 LBS
3 138 Gs
1.95 kg / 4.29 LBS
1947 g / 19.1 N
11.68 kg / 25.76 LBS
~0 Gs
50 mm 0.99 kg / 2.18 LBS
867 Gs
0.15 kg / 0.33 LBS
149 g / 1.5 N
0.89 kg / 1.97 LBS
~0 Gs
60 mm 0.47 kg / 1.04 LBS
598 Gs
0.07 kg / 0.16 LBS
71 g / 0.7 N
0.42 kg / 0.94 LBS
~0 Gs
70 mm 0.24 kg / 0.53 LBS
426 Gs
0.04 kg / 0.08 LBS
36 g / 0.4 N
0.22 kg / 0.47 LBS
~0 Gs
80 mm 0.13 kg / 0.28 LBS
312 Gs
0.02 kg / 0.04 LBS
19 g / 0.2 N
0.12 kg / 0.26 LBS
~0 Gs
90 mm 0.07 kg / 0.16 LBS
235 Gs
0.01 kg / 0.02 LBS
11 g / 0.1 N
0.07 kg / 0.14 LBS
~0 Gs
100 mm 0.04 kg / 0.09 LBS
181 Gs
0.01 kg / 0.01 LBS
6 g / 0.1 N
0.04 kg / 0.09 LBS
~0 Gs

Table 7: Hazards (electronics) - warnings
MW 33x10 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 14.5 cm
Hearing aid 10 Gs (1.0 mT) 11.5 cm
Timepiece 20 Gs (2.0 mT) 9.0 cm
Mobile device 40 Gs (4.0 mT) 7.0 cm
Car key 50 Gs (5.0 mT) 6.5 cm
Payment card 400 Gs (40.0 mT) 3.0 cm
HDD hard drive 600 Gs (60.0 mT) 2.5 cm

Table 8: Collisions (kinetic energy) - warning
MW 33x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.07 km/h
(6.13 m/s)
1.21 J
30 mm 33.74 km/h
(9.37 m/s)
2.82 J
50 mm 43.34 km/h
(12.04 m/s)
4.65 J
100 mm 61.26 km/h
(17.02 m/s)
9.29 J

Table 9: Anti-corrosion coating durability
MW 33x10 / 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 (Flux)
MW 33x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 29 509 Mx 295.1 µWb
Pc Coefficient 0.40 Low (Flat)

Table 11: Physics of underwater searching
MW 33x10 / N38

Environment Effective steel pull Effect
Air (land) 23.67 kg Standard
Water (riverbed) 27.10 kg
(+3.43 kg buoyancy gain)
+14.5%
Corrosion warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Wall mount (shear)

*Note: On a vertical wall, the magnet retains just a fraction of its perpendicular strength.

2. Steel thickness impact

*Thin steel (e.g. computer case) significantly limits the holding force.

3. Temperature resistance

*For N38 material, the max working temp is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.40

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.

Engineering data and GPSR
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
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: 010057-2026
Measurement Calculator
Pulling force

Magnetic Field

Other proposals

The offered product is an exceptionally strong cylindrical magnet, composed of durable NdFeB material, which, with dimensions of Ø33x10 mm, guarantees maximum efficiency. The MW 33x10 / N38 component is characterized by an accuracy of ±0.1mm and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 23.67 kg), this product is in stock from our warehouse in Poland, ensuring lightning-fast order fulfillment. Furthermore, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
It finds application in modeling, advanced robotics, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 232.15 N with a weight of only 64.15 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.
Due to the delicate structure of the ceramic sinter, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure long-term durability in industry, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering an optimal price-to-power ratio and operational stability. If you need the strongest magnets in the same volume (Ø33x10), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 33 mm and height 10 mm. The value of 232.15 N means that the magnet is capable of holding a weight many times exceeding its own mass of 64.15 g. The product has a [NiCuNi] coating, which protects the surface 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. Such an arrangement is standard 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 diametrically if your project requires it.

Advantages and disadvantages of Nd2Fe14B magnets.

Benefits

Apart from their superior power, neodymium magnets have these key benefits:
  • They do not lose magnetism, even over around 10 years – the drop in power is only ~1% (theoretically),
  • Magnets perfectly protect themselves against demagnetization caused by foreign field sources,
  • In other words, due to the reflective surface of gold, the element gains a professional look,
  • Neodymium magnets generate maximum magnetic induction on a small area, which ensures high operational effectiveness,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling functioning at temperatures approaching 230°C and above...
  • Possibility of exact modeling and adjusting to complex requirements,
  • Huge importance in future technologies – they are utilized in computer drives, brushless drives, medical devices, as well as industrial machines.
  • Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Limitations

Disadvantages of neodymium magnets:
  • At very strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
  • Due to limitations in creating threads and complicated forms in magnets, we propose using a housing - magnetic mechanism.
  • Possible danger resulting from small fragments of magnets are risky, when accidentally swallowed, which gains importance in the context of child health protection. It is also worth noting that small components of these devices can disrupt the diagnostic process medical after entering the body.
  • Due to neodymium price, their price exceeds standard values,

Holding force characteristics

Detachment force of the magnet in optimal conditionswhat affects it?

The declared magnet strength represents the maximum value, measured under ideal test conditions, specifically:
  • using a base made of high-permeability steel, serving as a ideal flux conductor
  • possessing a thickness of minimum 10 mm to avoid saturation
  • with a surface perfectly flat
  • under conditions of gap-free contact (metal-to-metal)
  • under axial force vector (90-degree angle)
  • at room temperature

Key elements affecting lifting force

Holding efficiency is influenced by working environment parameters, such as (from most important):
  • Distance (betwixt the magnet and the metal), because even a microscopic distance (e.g. 0.5 mm) results in a reduction in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
  • Force direction – catalog parameter refers to pulling vertically. When applying parallel force, the magnet exhibits significantly lower power (typically approx. 20-30% of nominal force).
  • Base massiveness – too thin steel does not accept the full field, causing part of the flux to be escaped to the other side.
  • Material type – the best choice is pure iron steel. Hardened steels may attract less.
  • Smoothness – full contact is obtained only on smooth steel. Rough texture create air cushions, weakening the magnet.
  • Thermal environment – temperature increase causes a temporary drop of induction. Check the thermal limit for a given model.

Lifting capacity testing was performed on a smooth plate of optimal thickness, under perpendicular forces, whereas under shearing force the lifting capacity is smaller. In addition, even a small distance between the magnet’s surface and the plate decreases the lifting capacity.

H&S for magnets
Adults only

NdFeB magnets are not toys. Swallowing multiple magnets may result in them connecting inside the digestive tract, which constitutes a severe health hazard and requires urgent medical intervention.

Permanent damage

Standard neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. The loss of strength is permanent.

Cards and drives

Avoid bringing magnets near a wallet, computer, or screen. The magnetic field can destroy these devices and erase data from cards.

Immense force

Exercise caution. Rare earth magnets attract from a distance and connect with massive power, often quicker than you can move away.

Eye protection

Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Do not hit, as the magnet may crumble into hazardous fragments.

Health Danger

Warning for patients: Strong magnetic fields disrupt electronics. Maintain at least 30 cm distance or request help to work with the magnets.

Crushing risk

Danger of trauma: The pulling power is so great that it can cause hematomas, crushing, and broken bones. Use thick gloves.

Combustion hazard

Powder created during grinding of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.

Keep away from electronics

A powerful magnetic field interferes with the operation of compasses in smartphones and GPS navigation. Keep magnets near a smartphone to avoid damaging the sensors.

Warning for allergy sufferers

Studies show that nickel (standard magnet coating) is a potent allergen. If your skin reacts to metals, avoid touching magnets with bare hands or opt for coated magnets.

Security! Want to know more? Read our article: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98