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MW 70x60 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010098

GTIN/EAN: 5906301810971

5.00

Diameter Ø

70 mm [±0,1 mm]

Height

60 mm [±0,1 mm]

Weight

1731.8 g

Magnetization Direction

↑ axial

Load capacity

163.93 kg / 1608.16 N

Magnetic Induction

535.45 mT / 5354 Gs

Coating

[NiCuNi] Nickel

630.01 with VAT / pcs + price for transport

512.20 ZŁ net + 23% VAT / pcs

bulk discounts:

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Technical parameters - MW 70x60 / N38 - cylindrical magnet

Specification / characteristics - MW 70x60 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010098
GTIN/EAN 5906301810971
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 70 mm [±0,1 mm]
Height 60 mm [±0,1 mm]
Weight 1731.8 g
Magnetization Direction ↑ axial
Load capacity ~ ? 163.93 kg / 1608.16 N
Magnetic Induction ~ ? 535.45 mT / 5354 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 70x60 / 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 assembly - technical parameters

Presented data represent the direct effect of a physical analysis. Results were calculated on models for the material Nd2Fe14B. Operational performance might slightly differ from theoretical values. Treat these data as a preliminary roadmap for designers.

Table 1: Static force (pull vs distance) - characteristics
MW 70x60 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5354 Gs
535.4 mT
163.93 kg / 361.40 pounds
163930.0 g / 1608.2 N
dangerous!
1 mm 5201 Gs
520.1 mT
154.68 kg / 341.01 pounds
154677.8 g / 1517.4 N
dangerous!
2 mm 5045 Gs
504.5 mT
145.58 kg / 320.96 pounds
145583.5 g / 1428.2 N
dangerous!
3 mm 4890 Gs
489.0 mT
136.77 kg / 301.52 pounds
136769.5 g / 1341.7 N
dangerous!
5 mm 4582 Gs
458.2 mT
120.07 kg / 264.72 pounds
120074.6 g / 1177.9 N
dangerous!
10 mm 3842 Gs
384.2 mT
84.43 kg / 186.13 pounds
84425.8 g / 828.2 N
dangerous!
15 mm 3176 Gs
317.6 mT
57.69 kg / 127.18 pounds
57688.8 g / 565.9 N
dangerous!
20 mm 2604 Gs
260.4 mT
38.78 kg / 85.50 pounds
38782.9 g / 380.5 N
dangerous!
30 mm 1744 Gs
174.4 mT
17.39 kg / 38.33 pounds
17385.0 g / 170.5 N
dangerous!
50 mm 829 Gs
82.9 mT
3.93 kg / 8.66 pounds
3929.4 g / 38.5 N
strong

Table 2: Slippage force (vertical surface)
MW 70x60 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 32.79 kg / 72.28 pounds
32786.0 g / 321.6 N
1 mm Stal (~0.2) 30.94 kg / 68.20 pounds
30936.0 g / 303.5 N
2 mm Stal (~0.2) 29.12 kg / 64.19 pounds
29116.0 g / 285.6 N
3 mm Stal (~0.2) 27.35 kg / 60.31 pounds
27354.0 g / 268.3 N
5 mm Stal (~0.2) 24.01 kg / 52.94 pounds
24014.0 g / 235.6 N
10 mm Stal (~0.2) 16.89 kg / 37.23 pounds
16886.0 g / 165.7 N
15 mm Stal (~0.2) 11.54 kg / 25.44 pounds
11538.0 g / 113.2 N
20 mm Stal (~0.2) 7.76 kg / 17.10 pounds
7756.0 g / 76.1 N
30 mm Stal (~0.2) 3.48 kg / 7.67 pounds
3478.0 g / 34.1 N
50 mm Stal (~0.2) 0.79 kg / 1.73 pounds
786.0 g / 7.7 N

Table 3: Vertical assembly (sliding) - vertical pull
MW 70x60 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
49.18 kg / 108.42 pounds
49179.0 g / 482.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
32.79 kg / 72.28 pounds
32786.0 g / 321.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
16.39 kg / 36.14 pounds
16393.0 g / 160.8 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
81.97 kg / 180.70 pounds
81965.0 g / 804.1 N

Table 4: Material efficiency (saturation) - sheet metal selection
MW 70x60 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
3%
5.46 kg / 12.05 pounds
5464.3 g / 53.6 N
1 mm
8%
13.66 kg / 30.12 pounds
13660.8 g / 134.0 N
2 mm
17%
27.32 kg / 60.23 pounds
27321.7 g / 268.0 N
3 mm
25%
40.98 kg / 90.35 pounds
40982.5 g / 402.0 N
5 mm
42%
68.30 kg / 150.58 pounds
68304.2 g / 670.1 N
10 mm
83%
136.61 kg / 301.17 pounds
136608.3 g / 1340.1 N
11 mm
92%
150.27 kg / 331.29 pounds
150269.2 g / 1474.1 N
12 mm
100%
163.93 kg / 361.40 pounds
163930.0 g / 1608.2 N

Table 5: Thermal stability (stability) - power drop
MW 70x60 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 163.93 kg / 361.40 pounds
163930.0 g / 1608.2 N
OK
40 °C -2.2% 160.32 kg / 353.45 pounds
160323.5 g / 1572.8 N
OK
60 °C -4.4% 156.72 kg / 345.50 pounds
156717.1 g / 1537.4 N
OK
80 °C -6.6% 153.11 kg / 337.55 pounds
153110.6 g / 1502.0 N
100 °C -28.8% 116.72 kg / 257.32 pounds
116718.2 g / 1145.0 N

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 70x60 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 680.08 kg / 1499.31 pounds
5 950 Gs
102.01 kg / 224.90 pounds
102012 g / 1000.7 N
N/A
1 mm 660.96 kg / 1457.16 pounds
10 556 Gs
99.14 kg / 218.57 pounds
99144 g / 972.6 N
594.86 kg / 1311.45 pounds
~0 Gs
2 mm 641.69 kg / 1414.69 pounds
10 401 Gs
96.25 kg / 212.20 pounds
96254 g / 944.3 N
577.52 kg / 1273.22 pounds
~0 Gs
3 mm 622.69 kg / 1372.80 pounds
10 246 Gs
93.40 kg / 205.92 pounds
93404 g / 916.3 N
560.42 kg / 1235.52 pounds
~0 Gs
5 mm 585.53 kg / 1290.87 pounds
9 936 Gs
87.83 kg / 193.63 pounds
87830 g / 861.6 N
526.98 kg / 1161.79 pounds
~0 Gs
10 mm 498.14 kg / 1098.21 pounds
9 164 Gs
74.72 kg / 164.73 pounds
74721 g / 733.0 N
448.33 kg / 988.39 pounds
~0 Gs
20 mm 350.25 kg / 772.16 pounds
7 684 Gs
52.54 kg / 115.82 pounds
52537 g / 515.4 N
315.22 kg / 694.95 pounds
~0 Gs
50 mm 107.57 kg / 237.16 pounds
4 259 Gs
16.14 kg / 35.57 pounds
16136 g / 158.3 N
96.82 kg / 213.44 pounds
~0 Gs
60 mm 72.12 kg / 159.00 pounds
3 487 Gs
10.82 kg / 23.85 pounds
10818 g / 106.1 N
64.91 kg / 143.10 pounds
~0 Gs
70 mm 48.77 kg / 107.51 pounds
2 867 Gs
7.31 kg / 16.13 pounds
7315 g / 71.8 N
43.89 kg / 96.76 pounds
~0 Gs
80 mm 33.37 kg / 73.57 pounds
2 372 Gs
5.01 kg / 11.04 pounds
5005 g / 49.1 N
30.03 kg / 66.21 pounds
~0 Gs
90 mm 23.15 kg / 51.04 pounds
1 976 Gs
3.47 kg / 7.66 pounds
3473 g / 34.1 N
20.84 kg / 45.94 pounds
~0 Gs
100 mm 16.30 kg / 35.94 pounds
1 658 Gs
2.45 kg / 5.39 pounds
2445 g / 24.0 N
14.67 kg / 32.34 pounds
~0 Gs

Table 7: Safety (HSE) (electronics) - warnings
MW 70x60 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 42.0 cm
Hearing aid 10 Gs (1.0 mT) 33.0 cm
Timepiece 20 Gs (2.0 mT) 25.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 19.5 cm
Remote 50 Gs (5.0 mT) 18.0 cm
Payment card 400 Gs (40.0 mT) 7.5 cm
HDD hard drive 600 Gs (60.0 mT) 6.0 cm

Table 8: Dynamics (kinetic energy) - warning
MW 70x60 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 12.58 km/h
(3.49 m/s)
10.57 J
30 mm 18.09 km/h
(5.02 m/s)
21.86 J
50 mm 22.27 km/h
(6.19 m/s)
33.13 J
100 mm 31.06 km/h
(8.63 m/s)
64.44 J

Table 9: Coating parameters (durability)
MW 70x60 / 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 70x60 / N38

Parameter Value SI Unit / Description
Magnetic Flux 209 626 Mx 2096.3 µWb
Pc Coefficient 0.82 High (Stable)

Table 11: Hydrostatics and buoyancy
MW 70x60 / N38

Environment Effective steel pull Effect
Air (land) 163.93 kg Standard
Water (riverbed) 187.70 kg
(+23.77 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

*Warning: On a vertical wall, the magnet retains merely approx. 20-30% of its perpendicular strength.

2. Steel saturation

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

3. Thermal stability

*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) = 0.82

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
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: 010098-2026
Magnet Unit Converter
Magnet pull force

Magnetic Field

Other proposals

The offered product is an extremely powerful cylinder magnet, produced from advanced NdFeB material, which, at dimensions of Ø70x60 mm, guarantees optimal power. The MW 70x60 / N38 model is characterized by high dimensional repeatability and industrial build quality, making it an ideal solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 163.93 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 typical operating conditions, ensuring an aesthetic appearance and durability for years.
This model is perfect for building generators, advanced Hall effect sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the pull force of 1608.16 N with a weight of only 1731.8 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Due to the delicate structure of the ceramic sinter, we absolutely advise against force-fitting (so-called press-fit), as this risks chipping the coating 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.
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 even stronger magnets in the same volume (Ø70x60), 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 Ø70x60 mm, which, at a weight of 1731.8 g, makes it an element with high magnetic energy density. The value of 1608.16 N means that the magnet is capable of holding a weight many times exceeding its own mass of 1731.8 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 60 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 through the diameter if your project requires it.

Advantages and disadvantages of rare earth magnets.

Pros

Besides their immense strength, neodymium magnets offer the following advantages:
  • They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (according to literature),
  • They are resistant to demagnetization induced by external magnetic fields,
  • The use of an elegant coating of noble metals (nickel, gold, silver) causes the element to present itself better,
  • They feature high magnetic induction at the operating surface, making them more effective,
  • 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...
  • Possibility of detailed modeling as well as adapting to complex applications,
  • Universal use in high-tech industry – they are used in mass storage devices, brushless drives, precision medical tools, and complex engineering applications.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

Cons of neodymium magnets: weaknesses and usage proposals
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
  • 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
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • Due to limitations in producing nuts and complex forms in magnets, we propose using a housing - magnetic mechanism.
  • Potential hazard related to microscopic parts of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child health protection. Additionally, small elements of these magnets are able to be problematic in diagnostics medical after entering the body.
  • With budget limitations the cost of neodymium magnets is economically unviable,

Lifting parameters

Maximum holding power of the magnet – what contributes to it?

The declared magnet strength represents the maximum value, recorded under optimal environment, namely:
  • with the contact of a sheet made of special test steel, ensuring maximum field concentration
  • whose thickness is min. 10 mm
  • with an ground contact surface
  • under conditions of no distance (metal-to-metal)
  • during pulling in a direction perpendicular to the plane
  • at conditions approx. 20°C

Impact of factors on magnetic holding capacity in practice

In practice, the real power results from a number of factors, presented from crucial:
  • Gap (betwixt the magnet and the metal), because even a microscopic distance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to varnish, corrosion or debris).
  • Force direction – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
  • Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Chemical composition of the base – mild steel attracts best. Alloy steels lower magnetic permeability and holding force.
  • Smoothness – full contact is obtained only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
  • Heat – NdFeB sinters have a sensitivity to temperature. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).

Lifting capacity testing was performed on a smooth plate of suitable thickness, under perpendicular forces, however under shearing force the load capacity is reduced by as much as 75%. In addition, even a slight gap between the magnet’s surface and the plate decreases the lifting capacity.

Safety rules for work with NdFeB magnets
Eye protection

Neodymium magnets are ceramic materials, meaning they are very brittle. Collision of two magnets will cause them breaking into small pieces.

Compass and GPS

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

Heat sensitivity

Regular neodymium magnets (grade N) undergo demagnetization when the temperature exceeds 80°C. This process is irreversible.

Bodily injuries

Mind your fingers. Two large magnets will snap together immediately with a force of massive weight, destroying everything in their path. Be careful!

Danger to pacemakers

Medical warning: Strong magnets can turn off pacemakers and defibrillators. Stay away if you have electronic implants.

Avoid contact if allergic

It is widely known that the nickel plating (standard magnet coating) is a common allergen. If your skin reacts to metals, prevent touching magnets with bare hands or choose coated magnets.

Handling rules

Before starting, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.

Flammability

Fire warning: Neodymium dust is explosive. Avoid machining magnets without safety gear as this risks ignition.

Choking Hazard

Strictly store magnets out of reach of children. Risk of swallowing is high, and the consequences of magnets connecting inside the body are life-threatening.

Electronic hazard

Data protection: Strong magnets can ruin data carriers and delicate electronics (heart implants, hearing aids, timepieces).

Safety First! Details about risks in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98