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MW 33x10 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010057

GTIN/EAN: 5906301810568

5.00
Load capacity 23.67 kg / 232.15 N Magnetic Induction 321.26 mT / 3213 Gs
Diameter Ø
33 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
64.15 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

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Frequently asked questions

What is the maximum working temperature of a disc magnet?
Standard N-series grades work up to 80 °C. Grades N50, N52 and N54 have a lower limit of 60 °C, because coercivity falls as BHmax rises. Higher temperatures require the H (120 °C), SH (150 °C), UH (180 °C), EH (200 °C) or AH (230 °C) series. Within the working range the magnet loses about 0.11% of its induction per degree, and that loss is reversible.
What is the difference between N38, N42 and N52?
The number after N is the energy product BHmax. Moving from N38 to N52 raises it by several tens of percent, but the real holding force increases by roughly 20%, because force also depends on geometry and on the magnetic circuit. N52 costs about twice as much as N42, so for most mounting work N38–N42 is the best price-to-force ratio.
What is the dimensional tolerance?
±0.1 mm as standard, ±0.05 mm to order. The tolerance is stated next to the dimensions on every product page.

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

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Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Physical properties - 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
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working 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 310 °C
Curie Temperature TF 590 °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 product - data

These information are the outcome of a physical simulation. Values were calculated on models for the material Nd2Fe14B. Actual conditions might slightly differ from theoretical values. Treat these data as a reference point when designing systems.

Table 1: Static pull force (force vs gap) - interaction chart
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
medium risk
15 mm 1004 Gs
100.4 mT
2.31 kg / 5.10 lbs
2312.6 g / 22.7 N
medium risk
20 mm 650 Gs
65.0 mT
0.97 kg / 2.14 lbs
969.4 g / 9.5 N
low risk
30 mm 299 Gs
29.9 mT
0.21 kg / 0.45 lbs
205.1 g / 2.0 N
low risk
50 mm 90 Gs
9.0 mT
0.02 kg / 0.04 lbs
18.7 g / 0.2 N
low risk

Table 2: Shear force (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: Wall mounting (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 (saturation) - 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 stability (stability) - resistance threshold
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: Magnet-Magnet interaction (repulsion) - field collision
MW 33x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (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 (implants) - precautionary measures
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
Mechanical watch 20 Gs (2.0 mT) 9.0 cm
Phone / Smartphone 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: Impact energy (cracking risk) - collision effects
MW 33x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 23.18 km/h
(6.44 m/s)
1.33 J
30 mm 25.71 km/h
(7.14 m/s)
1.64 J
50 mm 25.82 km/h
(7.17 m/s)
1.65 J
100 mm 25.84 km/h
(7.18 m/s)
1.65 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%
Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.

1. Shear force

*Warning: On a vertical surface, the magnet retains merely ~20% of its max power.

2. Efficiency vs thickness

*Thin metal sheet (e.g. computer case) significantly reduces 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) = 0.40

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.

Technical and environmental data

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%

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: 010057-2026
Magnet Unit Converter

Force (pull)


Magnetic Field

Other deals

The offered product is a very strong cylinder magnet, manufactured from durable NdFeB material, which, at dimensions of Ø33x10 mm, guarantees optimal power. The MW 33x10 / N38 model boasts a tolerance of ±0.1mm and professional build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 23.67 kg), this product is available off-the-shelf from our European logistics center, ensuring lightning-fast order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced automation, 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 rod is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 33.1 mm) using two-component epoxy glues. To ensure long-term durability in industry, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Magnets NdFeB grade N38 are strong enough for the majority of applications in modeling and machine building, where excessive miniaturization with maximum force is not required. 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 store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 33 mm and height 10 mm. The key parameter here is the holding force amounting to approximately 23.67 kg (force ~232.15 N), which, with such compact dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against oxidation, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 10 mm), which means that the N and S poles are located on the flat, circular surfaces. 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 diametrically if your project requires it.

Strengths and weaknesses of Nd2Fe14B magnets.

Strengths

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • They do not lose strength, even after approximately 10 years – the decrease in strength is only ~1% (theoretically),
  • They are resistant to demagnetization induced by external field influence,
  • In other words, due to the glossy layer of nickel, the element is aesthetically pleasing,
  • The surface of neodymium magnets generates a strong magnetic field – this is a key feature,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Thanks to modularity in constructing and the capacity to adapt to unusual requirements,
  • Versatile presence in advanced technology sectors – they are utilized in mass storage devices, electric drive systems, medical devices, and multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which enables their usage in miniature devices

Weaknesses

Disadvantages of NdFeB magnets:
  • At very strong impacts they can break, therefore we advise placing them in steel cases. 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 force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Limited possibility of making threads in the magnet and complex shapes - recommended is casing - magnetic holder.
  • Potential hazard to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the aspect of protecting the youngest. Additionally, small components of these devices are able to complicate diagnosis medical when they are in the body.
  • With large orders the cost of neodymium magnets is economically unviable,

Lifting parameters

Breakaway strength of the magnet in ideal conditionswhat it depends on?

The load parameter shown concerns the limit force, measured under laboratory conditions, namely:
  • on a plate made of mild steel, perfectly concentrating the magnetic flux
  • with a thickness no less than 10 mm
  • with a surface perfectly flat
  • with total lack of distance (no paint)
  • for force acting at a right angle (pull-off, not shear)
  • at standard ambient temperature

Magnet lifting force in use – key factors

Please note that the working load may be lower depending on the following factors, starting with the most relevant:
  • Air gap (betwixt the magnet and the metal), because even a very small clearance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to varnish, rust or debris).
  • Load vector – maximum parameter is obtained only during pulling at a 90° angle. The shear force of the magnet along the surface is typically several times lower (approx. 1/5 of the lifting capacity).
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
  • Steel grade – ideal substrate is pure iron steel. Cast iron may generate lower lifting capacity.
  • Surface structure – the smoother and more polished the surface, the better the adhesion and stronger the hold. Unevenness creates an air distance.
  • Thermal environment – heating the magnet results in weakening of force. It is worth remembering the maximum operating temperature for a given model.

Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the lifting capacity is smaller. Additionally, even a slight gap between the magnet’s surface and the plate reduces the load capacity.

Safety rules for work with NdFeB magnets
Choking Hazard

These products are not suitable for play. Accidental ingestion of multiple magnets can lead to them attracting across intestines, which constitutes a critical condition and necessitates urgent medical intervention.

Avoid contact if allergic

Allergy Notice: The Ni-Cu-Ni coating contains nickel. If skin irritation happens, cease handling magnets and use protective gear.

Fragile material

Watch out for shards. Magnets can explode upon uncontrolled impact, launching shards into the air. We recommend safety glasses.

Flammability

Dust created during grinding of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.

Implant safety

Individuals with a pacemaker must maintain an absolute distance from magnets. The magnetism can stop the operation of the implant.

Crushing force

Watch your fingers. Two powerful magnets will join instantly with a force of several hundred kilograms, crushing anything in their path. Be careful!

Data carriers

Do not bring magnets close to a wallet, computer, or screen. The magnetic field can destroy these devices and wipe information from cards.

Thermal limits

Do not overheat. Neodymium magnets are susceptible to temperature. If you require resistance above 80°C, ask us about HT versions (H, SH, UH).

Safe operation

Use magnets with awareness. Their immense force can surprise even experienced users. Be vigilant and respect their force.

Compass and GPS

Navigation devices and smartphones are extremely susceptible to magnetic fields. Direct contact with a strong magnet can decalibrate the sensors in your phone.

Attention! Need more info? Read our article: Are neodymium magnets dangerous?