Neodymium magnets: power you're looking for

Need strong magnetic field? We offer rich assortment of various shapes and sizes. They are ideal for home use, garage and industrial tasks. See products in stock.

check full offer

Magnet fishing: solid F200/F400 sets

Begin your hobby involving underwater treasure hunting! Our specialized grips (F200, F400) provide grip certainty and immense power. Stainless steel construction and reinforced ropes will perform in challenging water conditions.

find searching equipment

Reliable threaded grips

Professional solutions for mounting without drilling. Threaded grips (M8, M10, M12) guarantee quick improvement of work on warehouses. They are indispensable installing lighting, detectors and ads.

check available threads

🚀 Lightning processing: orders by 14:00 shipped immediately!

Dhit sp. z o.o.
Product on order Ships in 3-5 days

MW 29.9x10 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010052

GTIN/EAN: 5906301810513

Diameter Ø

29.9 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

52.66 g

Magnetization Direction

→ diametrical

Load capacity

21.50 kg / 210.90 N

Magnetic Induction

344.60 mT / 3446 Gs

Coating

[NiCuNi] Nickel

24.60 with VAT / pcs + price for transport

20.00 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
20.00 ZŁ
24.60 ZŁ
price from 30 pcs
18.80 ZŁ
23.12 ZŁ
price from 130 pcs
17.60 ZŁ
21.65 ZŁ
Hunting for a discount?

Pick up the phone and ask +48 888 99 98 98 if you prefer let us know by means of inquiry form the contact form page.
Weight as well as structure of magnetic components can be analyzed using our force calculator.

Order by 14:00 and we’ll ship today!

Physical properties - MW 29.9x10 / N38 - cylindrical magnet

Specification / characteristics - MW 29.9x10 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010052
GTIN/EAN 5906301810513
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 29.9 mm [±0,1 mm]
Height 10 mm [±0,1 mm]
Weight 52.66 g
Magnetization Direction → diametrical
Load capacity ~ ? 21.50 kg / 210.90 N
Magnetic Induction ~ ? 344.60 mT / 3446 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 29.9x10 / 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

Presented values represent the result of a physical simulation. Values are based on models for the class Nd2Fe14B. Actual performance might slightly deviate from the simulation results. Treat these data as a preliminary roadmap during assembly planning.

Table 1: Static force (force vs gap) - interaction chart
MW 29.9x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3445 Gs
344.5 mT
21.50 kg / 47.40 pounds
21500.0 g / 210.9 N
critical level
1 mm 3261 Gs
326.1 mT
19.26 kg / 42.45 pounds
19256.6 g / 188.9 N
critical level
2 mm 3059 Gs
305.9 mT
16.95 kg / 37.36 pounds
16947.4 g / 166.3 N
critical level
3 mm 2848 Gs
284.8 mT
14.70 kg / 32.40 pounds
14696.2 g / 144.2 N
critical level
5 mm 2425 Gs
242.5 mT
10.65 kg / 23.48 pounds
10650.1 g / 104.5 N
critical level
10 mm 1519 Gs
151.9 mT
4.18 kg / 9.21 pounds
4178.4 g / 41.0 N
warning
15 mm 930 Gs
93.0 mT
1.57 kg / 3.45 pounds
1565.8 g / 15.4 N
low risk
20 mm 583 Gs
58.3 mT
0.62 kg / 1.36 pounds
616.0 g / 6.0 N
low risk
30 mm 258 Gs
25.8 mT
0.12 kg / 0.27 pounds
121.0 g / 1.2 N
low risk
50 mm 76 Gs
7.6 mT
0.01 kg / 0.02 pounds
10.4 g / 0.1 N
low risk

Table 2: Shear load (vertical surface)
MW 29.9x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 4.30 kg / 9.48 pounds
4300.0 g / 42.2 N
1 mm Stal (~0.2) 3.85 kg / 8.49 pounds
3852.0 g / 37.8 N
2 mm Stal (~0.2) 3.39 kg / 7.47 pounds
3390.0 g / 33.3 N
3 mm Stal (~0.2) 2.94 kg / 6.48 pounds
2940.0 g / 28.8 N
5 mm Stal (~0.2) 2.13 kg / 4.70 pounds
2130.0 g / 20.9 N
10 mm Stal (~0.2) 0.84 kg / 1.84 pounds
836.0 g / 8.2 N
15 mm Stal (~0.2) 0.31 kg / 0.69 pounds
314.0 g / 3.1 N
20 mm Stal (~0.2) 0.12 kg / 0.27 pounds
124.0 g / 1.2 N
30 mm Stal (~0.2) 0.02 kg / 0.05 pounds
24.0 g / 0.2 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 29.9x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
6.45 kg / 14.22 pounds
6450.0 g / 63.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
4.30 kg / 9.48 pounds
4300.0 g / 42.2 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
2.15 kg / 4.74 pounds
2150.0 g / 21.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
10.75 kg / 23.70 pounds
10750.0 g / 105.5 N

Table 4: Material efficiency (substrate influence) - power losses
MW 29.9x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
1.08 kg / 2.37 pounds
1075.0 g / 10.5 N
1 mm
13%
2.69 kg / 5.92 pounds
2687.5 g / 26.4 N
2 mm
25%
5.38 kg / 11.85 pounds
5375.0 g / 52.7 N
3 mm
38%
8.06 kg / 17.77 pounds
8062.5 g / 79.1 N
5 mm
63%
13.44 kg / 29.62 pounds
13437.5 g / 131.8 N
10 mm
100%
21.50 kg / 47.40 pounds
21500.0 g / 210.9 N
11 mm
100%
21.50 kg / 47.40 pounds
21500.0 g / 210.9 N
12 mm
100%
21.50 kg / 47.40 pounds
21500.0 g / 210.9 N

Table 5: Thermal resistance (stability) - resistance threshold
MW 29.9x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 21.50 kg / 47.40 pounds
21500.0 g / 210.9 N
OK
40 °C -2.2% 21.03 kg / 46.36 pounds
21027.0 g / 206.3 N
OK
60 °C -4.4% 20.55 kg / 45.31 pounds
20554.0 g / 201.6 N
80 °C -6.6% 20.08 kg / 44.27 pounds
20081.0 g / 197.0 N
100 °C -28.8% 15.31 kg / 33.75 pounds
15308.0 g / 150.2 N

Table 6: Two magnets (attraction) - forces in the system
MW 29.9x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 51.38 kg / 113.28 pounds
4 963 Gs
7.71 kg / 16.99 pounds
7708 g / 75.6 N
N/A
1 mm 48.76 kg / 107.50 pounds
6 712 Gs
7.31 kg / 16.12 pounds
7314 g / 71.7 N
43.88 kg / 96.75 pounds
~0 Gs
2 mm 46.02 kg / 101.46 pounds
6 521 Gs
6.90 kg / 15.22 pounds
6903 g / 67.7 N
41.42 kg / 91.32 pounds
~0 Gs
3 mm 43.26 kg / 95.37 pounds
6 322 Gs
6.49 kg / 14.31 pounds
6489 g / 63.7 N
38.93 kg / 85.83 pounds
~0 Gs
5 mm 37.78 kg / 83.30 pounds
5 909 Gs
5.67 kg / 12.49 pounds
5667 g / 55.6 N
34.00 kg / 74.97 pounds
~0 Gs
10 mm 25.45 kg / 56.11 pounds
4 850 Gs
3.82 kg / 8.42 pounds
3818 g / 37.5 N
22.91 kg / 50.50 pounds
~0 Gs
20 mm 9.99 kg / 22.02 pounds
3 038 Gs
1.50 kg / 3.30 pounds
1498 g / 14.7 N
8.99 kg / 19.81 pounds
~0 Gs
50 mm 0.63 kg / 1.38 pounds
761 Gs
0.09 kg / 0.21 pounds
94 g / 0.9 N
0.56 kg / 1.24 pounds
~0 Gs
60 mm 0.29 kg / 0.64 pounds
517 Gs
0.04 kg / 0.10 pounds
43 g / 0.4 N
0.26 kg / 0.57 pounds
~0 Gs
70 mm 0.14 kg / 0.32 pounds
364 Gs
0.02 kg / 0.05 pounds
22 g / 0.2 N
0.13 kg / 0.28 pounds
~0 Gs
80 mm 0.08 kg / 0.17 pounds
265 Gs
0.01 kg / 0.03 pounds
11 g / 0.1 N
0.07 kg / 0.15 pounds
~0 Gs
90 mm 0.04 kg / 0.09 pounds
198 Gs
0.01 kg / 0.01 pounds
6 g / 0.1 N
0.04 kg / 0.08 pounds
~0 Gs
100 mm 0.02 kg / 0.05 pounds
152 Gs
0.00 kg / 0.01 pounds
4 g / 0.0 N
0.02 kg / 0.05 pounds
~0 Gs

Table 7: Safety (HSE) (implants) - warnings
MW 29.9x10 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 13.5 cm
Hearing aid 10 Gs (1.0 mT) 11.0 cm
Mechanical watch 20 Gs (2.0 mT) 8.5 cm
Mobile device 40 Gs (4.0 mT) 6.5 cm
Car key 50 Gs (5.0 mT) 6.0 cm
Payment card 400 Gs (40.0 mT) 2.5 cm
HDD hard drive 600 Gs (60.0 mT) 2.0 cm

Table 8: Impact energy (kinetic energy) - warning
MW 29.9x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.72 km/h
(6.31 m/s)
1.05 J
30 mm 35.42 km/h
(9.84 m/s)
2.55 J
50 mm 45.58 km/h
(12.66 m/s)
4.22 J
100 mm 64.44 km/h
(17.90 m/s)
8.44 J

Table 9: Surface protection spec
MW 29.9x10 / 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 29.9x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 25 588 Mx 255.9 µWb
Pc Coefficient 0.44 Low (Flat)

Table 11: Hydrostatics and buoyancy
MW 29.9x10 / N38

Environment Effective steel pull Effect
Air (land) 21.50 kg Standard
Water (riverbed) 24.62 kg
(+3.12 kg buoyancy gain)
+14.5%
Warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Sliding resistance

*Warning: On a vertical surface, the magnet retains only approx. 20-30% of its max power.

2. Plate thickness effect

*Thin metal sheet (e.g. 0.5mm PC case) drastically weakens the holding force.

3. Thermal stability

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.44

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.

Technical and environmental data
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%
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: 010052-2026
Magnet Unit Converter
Magnet pull force

Magnetic Field

Other deals

The offered product is a very strong cylindrical magnet, made from durable NdFeB material, which, at dimensions of Ø29.9x10 mm, guarantees optimal power. This specific item is characterized by a tolerance of ±0.1mm and industrial build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with significant force (approx. 21.50 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Additionally, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is created for building generators, advanced sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the high power of 210.90 N with a weight of only 52.66 g, this cylindrical magnet is indispensable in electronics and wherever every gram matters.
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 precision component. To ensure stability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need even stronger magnets in the same volume (Ø29.9x10), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.
This model is characterized by dimensions Ø29.9x10 mm, which, at a weight of 52.66 g, makes it an element with high magnetic energy density. The value of 210.90 N means that the magnet is capable of holding a weight many times exceeding its own mass of 52.66 g. The product has a [NiCuNi] coating, which protects the surface against oxidation, giving it an aesthetic, silvery shine.
This cylinder 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.

Pros and cons of neodymium magnets.

Strengths

Besides their durability, neodymium magnets are valued for these benefits:
  • They virtually do not lose power, because even after ten years the performance loss is only ~1% (based on calculations),
  • They possess excellent resistance to magnetism drop as a result of opposing magnetic fields,
  • A magnet with a smooth gold surface has an effective appearance,
  • Neodymium magnets create maximum magnetic induction on a their surface, which increases force concentration,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
  • Due to the ability of precise forming and adaptation to individualized requirements, NdFeB magnets can be modeled in a wide range of shapes and sizes, which amplifies use scope,
  • Universal use in high-tech industry – they are commonly used in magnetic memories, drive modules, precision medical tools, also modern systems.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Weaknesses

Disadvantages of neodymium magnets:
  • Brittleness is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a strong case, which not only secures 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 power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation as well as corrosion.
  • We suggest casing - magnetic mount, due to difficulties in creating nuts inside the magnet and complex forms.
  • Health risk to health – tiny shards of magnets are risky, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Additionally, small elements of these products are able to be problematic in diagnostics medical when they are in the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities

Pull force analysis

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

The load parameter shown represents the limit force, recorded under optimal environment, specifically:
  • with the use of a yoke made of low-carbon steel, ensuring full magnetic saturation
  • with a cross-section no less than 10 mm
  • characterized by lack of roughness
  • with total lack of distance (no paint)
  • for force acting at a right angle (pull-off, not shear)
  • at standard ambient temperature

Key elements affecting lifting force

Real force is influenced by working environment parameters, mainly (from priority):
  • Space between surfaces – every millimeter of separation (caused e.g. by veneer or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of generating force.
  • Material composition – different alloys reacts the same. Alloy additives worsen the interaction with the magnet.
  • Smoothness – ideal contact is obtained only on polished steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Temperature – heating the magnet causes a temporary drop of force. Check the thermal limit 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 load capacity is reduced by as much as fivefold. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the holding force.

Safe handling of neodymium magnets
Combustion hazard

Powder produced during cutting of magnets is combustible. Avoid drilling into magnets unless you are an expert.

Safe distance

Do not bring magnets close to a wallet, laptop, or TV. The magnetism can irreversibly ruin these devices and erase data from cards.

Caution required

Handle magnets with awareness. Their huge power can surprise even professionals. Stay alert and respect their power.

Allergy Warning

Certain individuals suffer from a hypersensitivity to Ni, which is the common plating for NdFeB magnets. Prolonged contact may cause dermatitis. We strongly advise wear protective gloves.

Medical interference

Life threat: Neodymium magnets can deactivate pacemakers and defibrillators. Stay away if you have medical devices.

Choking Hazard

Absolutely store magnets away from children. Choking hazard is high, and the effects of magnets clamping inside the body are tragic.

Permanent damage

Standard neodymium magnets (grade N) lose magnetization when the temperature exceeds 80°C. Damage is permanent.

Fragile material

Protect your eyes. Magnets can explode upon uncontrolled impact, launching shards into the air. Wear goggles.

Impact on smartphones

GPS units and smartphones are extremely sensitive to magnetism. Close proximity with a powerful NdFeB magnet can ruin the internal compass in your phone.

Pinching danger

Pinching hazard: The attraction force is so great that it can cause hematomas, crushing, and even bone fractures. Protective gloves are recommended.

Warning! 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