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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

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Technical - 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 modeling of the assembly - technical parameters

These information are the result of a mathematical simulation. Results are based on models for the material Nd2Fe14B. Actual conditions might slightly differ. Please consider these calculations as a reference point during assembly planning.

Table 1: Static pull force (pull vs gap) - power drop
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 lbs
163930.0 g / 1608.2 N
crushing
1 mm 5201 Gs
520.1 mT
154.68 kg / 341.01 lbs
154677.8 g / 1517.4 N
crushing
2 mm 5045 Gs
504.5 mT
145.58 kg / 320.96 lbs
145583.5 g / 1428.2 N
crushing
3 mm 4890 Gs
489.0 mT
136.77 kg / 301.52 lbs
136769.5 g / 1341.7 N
crushing
5 mm 4582 Gs
458.2 mT
120.07 kg / 264.72 lbs
120074.6 g / 1177.9 N
crushing
10 mm 3842 Gs
384.2 mT
84.43 kg / 186.13 lbs
84425.8 g / 828.2 N
crushing
15 mm 3176 Gs
317.6 mT
57.69 kg / 127.18 lbs
57688.8 g / 565.9 N
crushing
20 mm 2604 Gs
260.4 mT
38.78 kg / 85.50 lbs
38782.9 g / 380.5 N
crushing
30 mm 1744 Gs
174.4 mT
17.39 kg / 38.33 lbs
17385.0 g / 170.5 N
crushing
50 mm 829 Gs
82.9 mT
3.93 kg / 8.66 lbs
3929.4 g / 38.5 N
medium risk

Table 2: Shear force (wall)
MW 70x60 / N38

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

Table 3: Wall mounting (shearing) - 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 lbs
49179.0 g / 482.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
32.79 kg / 72.28 lbs
32786.0 g / 321.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
16.39 kg / 36.14 lbs
16393.0 g / 160.8 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
81.97 kg / 180.70 lbs
81965.0 g / 804.1 N

Table 4: Material efficiency (substrate influence) - power losses
MW 70x60 / N38

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

Table 5: Thermal stability (stability) - resistance threshold
MW 70x60 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 163.93 kg / 361.40 lbs
163930.0 g / 1608.2 N
OK
40 °C -2.2% 160.32 kg / 353.45 lbs
160323.5 g / 1572.8 N
OK
60 °C -4.4% 156.72 kg / 345.50 lbs
156717.1 g / 1537.4 N
OK
80 °C -6.6% 153.11 kg / 337.55 lbs
153110.6 g / 1502.0 N
100 °C -28.8% 116.72 kg / 257.32 lbs
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 lbs
5 950 Gs
102.01 kg / 224.90 lbs
102012 g / 1000.7 N
N/A
1 mm 660.96 kg / 1457.16 lbs
10 556 Gs
99.14 kg / 218.57 lbs
99144 g / 972.6 N
594.86 kg / 1311.45 lbs
~0 Gs
2 mm 641.69 kg / 1414.69 lbs
10 401 Gs
96.25 kg / 212.20 lbs
96254 g / 944.3 N
577.52 kg / 1273.22 lbs
~0 Gs
3 mm 622.69 kg / 1372.80 lbs
10 246 Gs
93.40 kg / 205.92 lbs
93404 g / 916.3 N
560.42 kg / 1235.52 lbs
~0 Gs
5 mm 585.53 kg / 1290.87 lbs
9 936 Gs
87.83 kg / 193.63 lbs
87830 g / 861.6 N
526.98 kg / 1161.79 lbs
~0 Gs
10 mm 498.14 kg / 1098.21 lbs
9 164 Gs
74.72 kg / 164.73 lbs
74721 g / 733.0 N
448.33 kg / 988.39 lbs
~0 Gs
20 mm 350.25 kg / 772.16 lbs
7 684 Gs
52.54 kg / 115.82 lbs
52537 g / 515.4 N
315.22 kg / 694.95 lbs
~0 Gs
50 mm 107.57 kg / 237.16 lbs
4 259 Gs
16.14 kg / 35.57 lbs
16136 g / 158.3 N
96.82 kg / 213.44 lbs
~0 Gs
60 mm 72.12 kg / 159.00 lbs
3 487 Gs
10.82 kg / 23.85 lbs
10818 g / 106.1 N
64.91 kg / 143.10 lbs
~0 Gs
70 mm 48.77 kg / 107.51 lbs
2 867 Gs
7.31 kg / 16.13 lbs
7315 g / 71.8 N
43.89 kg / 96.76 lbs
~0 Gs
80 mm 33.37 kg / 73.57 lbs
2 372 Gs
5.01 kg / 11.04 lbs
5005 g / 49.1 N
30.03 kg / 66.21 lbs
~0 Gs
90 mm 23.15 kg / 51.04 lbs
1 976 Gs
3.47 kg / 7.66 lbs
3473 g / 34.1 N
20.84 kg / 45.94 lbs
~0 Gs
100 mm 16.30 kg / 35.94 lbs
1 658 Gs
2.45 kg / 5.39 lbs
2445 g / 24.0 N
14.67 kg / 32.34 lbs
~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
Mobile device 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) - collision effects
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: Anti-corrosion coating 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 (Pc)
MW 70x60 / N38

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

Table 11: Submerged application
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%
Rust risk: 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

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

2. Steel thickness impact

*Thin steel (e.g. 0.5mm PC case) drastically reduces the holding force.

3. Thermal stability

*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) = 0.82

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 specification and ecology
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%
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: 010098-2026
Quick Unit Converter
Force (pull)

Magnetic Induction

Other proposals

This product is an extremely powerful cylindrical magnet, produced from modern NdFeB material, which, with dimensions of Ø70x60 mm, guarantees maximum efficiency. This specific item features a tolerance of ±0.1mm and industrial build quality, making it an excellent 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 triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
It successfully proves itself in DIY projects, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 1608.16 N with a weight of only 1731.8 g, this rod 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 chipping the coating of this professional component. To ensure stability in industry, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø70x60), 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 70 mm and height 60 mm. 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 protects the surface against oxidation, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 60 mm), which means that the N and S poles are located on the flat, circular surfaces. Such an arrangement is most desirable 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 through the diameter if your project requires it.

Strengths and weaknesses of neodymium magnets.

Advantages

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They do not lose power, even during nearly 10 years – the reduction in power is only ~1% (based on measurements),
  • Neodymium magnets are characterized by exceptionally resistant to magnetic field loss caused by magnetic disturbances,
  • The use of an metallic layer of noble metals (nickel, gold, silver) causes the element to present itself better,
  • They are known for high magnetic induction at the operating surface, which increases their power,
  • Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
  • Due to the possibility of free molding and adaptation to specialized needs, magnetic components can be produced in a wide range of geometric configurations, which expands the range of possible applications,
  • Versatile presence in future technologies – they find application in computer drives, electric drive systems, medical equipment, also multitasking production systems.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Disadvantages

What to avoid - cons of neodymium magnets: tips and applications.
  • 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.
  • Neodymium magnets decrease their power 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 start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation as well as corrosion.
  • Limited possibility of making nuts in the magnet and complicated shapes - preferred is a housing - magnetic holder.
  • Possible danger resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child safety. Furthermore, tiny parts of these devices can complicate diagnosis medical after entering the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Maximum lifting force for a neodymium magnet – what contributes to it?

The lifting capacity listed is a result of laboratory testing conducted under specific, ideal conditions:
  • on a base made of mild steel, perfectly concentrating the magnetic field
  • with a cross-section minimum 10 mm
  • with an ideally smooth touching surface
  • under conditions of no distance (surface-to-surface)
  • for force acting at a right angle (pull-off, not shear)
  • at temperature room level

Magnet lifting force in use – key factors

It is worth knowing that the magnet holding will differ depending on elements below, starting with the most relevant:
  • Gap (between the magnet and the plate), since even a very small distance (e.g. 0.5 mm) can cause a drastic drop in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
  • Load vector – maximum parameter is obtained only during perpendicular pulling. The shear force of the magnet along the surface is typically several times lower (approx. 1/5 of the lifting capacity).
  • Steel thickness – too thin sheet does not close the flux, causing part of the power to be wasted to the other side.
  • Metal type – different alloys attracts identically. High carbon content weaken the attraction effect.
  • Surface finish – ideal contact is possible only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
  • Operating temperature – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and in frost they can be stronger (up to a certain limit).

Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate decreases the lifting capacity.

Safety rules for work with NdFeB magnets
Beware of splinters

NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Collision of two magnets will cause them breaking into small pieces.

Heat sensitivity

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

Physical harm

Big blocks can crush fingers instantly. Never place your hand between two strong magnets.

Magnetic media

Avoid bringing magnets near a purse, computer, or TV. The magnetic field can permanently damage these devices and wipe information from cards.

Safe operation

Use magnets consciously. Their huge power can surprise even professionals. Be vigilant and respect their power.

Impact on smartphones

GPS units and mobile phones are highly sensitive to magnetism. Close proximity with a strong magnet can permanently damage the sensors in your phone.

Swallowing risk

Absolutely keep magnets away from children. Risk of swallowing is high, and the consequences of magnets connecting inside the body are very dangerous.

Dust is flammable

Dust generated during machining of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.

Metal Allergy

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If an allergic reaction occurs, cease working with magnets and use protective gear.

Medical interference

People with a ICD have to keep an large gap from magnets. The magnetism can interfere with the operation of the life-saving device.

Warning! Details about hazards in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98