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MW 70x50 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010496

GTIN/EAN: 5906301811145

Diameter Ø

70 mm [±0,1 mm]

Height

50 mm [±0,1 mm]

Weight

1443.17 g

Magnetization Direction

↑ axial

Load capacity

168.21 kg / 1650.14 N

Magnetic Induction

507.83 mT / 5078 Gs

Coating

[NiCuNi] Nickel

516.60 with VAT / pcs + price for transport

420.00 ZŁ net + 23% VAT / pcs

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Technical parameters of the product - MW 70x50 / N38 - cylindrical magnet

Specification / characteristics - MW 70x50 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010496
GTIN/EAN 5906301811145
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 50 mm [±0,1 mm]
Weight 1443.17 g
Magnetization Direction ↑ axial
Load capacity ~ ? 168.21 kg / 1650.14 N
Magnetic Induction ~ ? 507.83 mT / 5078 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 70x50 / 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 magnet - data

The following values are the result of a mathematical calculation. Values were calculated on models for the material Nd2Fe14B. Operational parameters may deviate from the simulation results. Treat these calculations as a reference point when designing systems.

Table 1: Static force (force vs distance) - power drop
MW 70x50 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5078 Gs
507.8 mT
168.21 kg / 370.84 LBS
168210.0 g / 1650.1 N
dangerous!
1 mm 4935 Gs
493.5 mT
158.88 kg / 350.26 LBS
158876.4 g / 1558.6 N
dangerous!
2 mm 4790 Gs
479.0 mT
149.67 kg / 329.96 LBS
149666.1 g / 1468.2 N
dangerous!
3 mm 4644 Gs
464.4 mT
140.71 kg / 310.21 LBS
140708.8 g / 1380.4 N
dangerous!
5 mm 4354 Gs
435.4 mT
123.67 kg / 272.64 LBS
123667.4 g / 1213.2 N
dangerous!
10 mm 3652 Gs
365.2 mT
87.02 kg / 191.84 LBS
87016.1 g / 853.6 N
dangerous!
15 mm 3017 Gs
301.7 mT
59.37 kg / 130.88 LBS
59366.6 g / 582.4 N
dangerous!
20 mm 2469 Gs
246.9 mT
39.78 kg / 87.70 LBS
39781.3 g / 390.3 N
dangerous!
30 mm 1645 Gs
164.5 mT
17.66 kg / 38.93 LBS
17659.3 g / 173.2 N
dangerous!
50 mm 773 Gs
77.3 mT
3.89 kg / 8.59 LBS
3895.0 g / 38.2 N
warning

Table 2: Slippage capacity (vertical surface)
MW 70x50 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 33.64 kg / 74.17 LBS
33642.0 g / 330.0 N
1 mm Stal (~0.2) 31.78 kg / 70.05 LBS
31776.0 g / 311.7 N
2 mm Stal (~0.2) 29.93 kg / 65.99 LBS
29934.0 g / 293.7 N
3 mm Stal (~0.2) 28.14 kg / 62.04 LBS
28142.0 g / 276.1 N
5 mm Stal (~0.2) 24.73 kg / 54.53 LBS
24734.0 g / 242.6 N
10 mm Stal (~0.2) 17.40 kg / 38.37 LBS
17404.0 g / 170.7 N
15 mm Stal (~0.2) 11.87 kg / 26.18 LBS
11874.0 g / 116.5 N
20 mm Stal (~0.2) 7.96 kg / 17.54 LBS
7956.0 g / 78.0 N
30 mm Stal (~0.2) 3.53 kg / 7.79 LBS
3532.0 g / 34.6 N
50 mm Stal (~0.2) 0.78 kg / 1.72 LBS
778.0 g / 7.6 N

Table 3: Wall mounting (shearing) - vertical pull
MW 70x50 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
50.46 kg / 111.25 LBS
50463.0 g / 495.0 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
33.64 kg / 74.17 LBS
33642.0 g / 330.0 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
16.82 kg / 37.08 LBS
16821.0 g / 165.0 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
84.11 kg / 185.42 LBS
84105.0 g / 825.1 N

Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 70x50 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
3%
5.61 kg / 12.36 LBS
5607.0 g / 55.0 N
1 mm
8%
14.02 kg / 30.90 LBS
14017.5 g / 137.5 N
2 mm
17%
28.03 kg / 61.81 LBS
28035.0 g / 275.0 N
3 mm
25%
42.05 kg / 92.71 LBS
42052.5 g / 412.5 N
5 mm
42%
70.09 kg / 154.52 LBS
70087.5 g / 687.6 N
10 mm
83%
140.18 kg / 309.03 LBS
140175.0 g / 1375.1 N
11 mm
92%
154.19 kg / 339.94 LBS
154192.5 g / 1512.6 N
12 mm
100%
168.21 kg / 370.84 LBS
168210.0 g / 1650.1 N

Table 5: Thermal stability (stability) - thermal limit
MW 70x50 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 168.21 kg / 370.84 LBS
168210.0 g / 1650.1 N
OK
40 °C -2.2% 164.51 kg / 362.68 LBS
164509.4 g / 1613.8 N
OK
60 °C -4.4% 160.81 kg / 354.52 LBS
160808.8 g / 1577.5 N
OK
80 °C -6.6% 157.11 kg / 346.36 LBS
157108.1 g / 1541.2 N
100 °C -28.8% 119.77 kg / 264.04 LBS
119765.5 g / 1174.9 N

Table 6: Two magnets (attraction) - forces in the system
MW 70x50 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 611.75 kg / 1348.67 LBS
5 850 Gs
91.76 kg / 202.30 LBS
91762 g / 900.2 N
N/A
1 mm 594.86 kg / 1311.43 LBS
10 014 Gs
89.23 kg / 196.72 LBS
89229 g / 875.3 N
535.37 kg / 1180.29 LBS
~0 Gs
2 mm 577.80 kg / 1273.84 LBS
9 870 Gs
86.67 kg / 191.08 LBS
86670 g / 850.2 N
520.02 kg / 1146.45 LBS
~0 Gs
3 mm 560.95 kg / 1236.68 LBS
9 725 Gs
84.14 kg / 185.50 LBS
84142 g / 825.4 N
504.85 kg / 1113.01 LBS
~0 Gs
5 mm 527.90 kg / 1163.81 LBS
9 434 Gs
79.18 kg / 174.57 LBS
79184 g / 776.8 N
475.11 kg / 1047.43 LBS
~0 Gs
10 mm 449.75 kg / 991.54 LBS
8 708 Gs
67.46 kg / 148.73 LBS
67463 g / 661.8 N
404.78 kg / 892.38 LBS
~0 Gs
20 mm 316.46 kg / 697.68 LBS
7 304 Gs
47.47 kg / 104.65 LBS
47469 g / 465.7 N
284.81 kg / 627.91 LBS
~0 Gs
50 mm 96.30 kg / 212.30 LBS
4 029 Gs
14.44 kg / 31.85 LBS
14445 g / 141.7 N
86.67 kg / 191.07 LBS
~0 Gs
60 mm 64.22 kg / 141.59 LBS
3 291 Gs
9.63 kg / 21.24 LBS
9634 g / 94.5 N
57.80 kg / 127.43 LBS
~0 Gs
70 mm 43.17 kg / 95.18 LBS
2 698 Gs
6.48 kg / 14.28 LBS
6476 g / 63.5 N
38.86 kg / 85.66 LBS
~0 Gs
80 mm 29.36 kg / 64.73 LBS
2 225 Gs
4.40 kg / 9.71 LBS
4404 g / 43.2 N
26.43 kg / 58.26 LBS
~0 Gs
90 mm 20.25 kg / 44.63 LBS
1 847 Gs
3.04 kg / 6.69 LBS
3037 g / 29.8 N
18.22 kg / 40.17 LBS
~0 Gs
100 mm 14.17 kg / 31.23 LBS
1 545 Gs
2.12 kg / 4.68 LBS
2125 g / 20.8 N
12.75 kg / 28.11 LBS
~0 Gs

Table 7: Protective zones (implants) - warnings
MW 70x50 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 40.0 cm
Hearing aid 10 Gs (1.0 mT) 31.5 cm
Timepiece 20 Gs (2.0 mT) 24.5 cm
Mobile device 40 Gs (4.0 mT) 19.0 cm
Remote 50 Gs (5.0 mT) 17.5 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 70x50 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 13.97 km/h
(3.88 m/s)
10.87 J
30 mm 20.06 km/h
(5.57 m/s)
22.40 J
50 mm 24.70 km/h
(6.86 m/s)
33.96 J
100 mm 34.46 km/h
(9.57 m/s)
66.12 J

Table 9: Coating parameters (durability)
MW 70x50 / 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 70x50 / N38

Parameter Value SI Unit / Description
Magnetic Flux 197 145 Mx 1971.5 µWb
Pc Coefficient 0.74 High (Stable)

Table 11: Underwater work (magnet fishing)
MW 70x50 / N38

Environment Effective steel pull Effect
Air (land) 168.21 kg Standard
Water (riverbed) 192.60 kg
(+24.39 kg buoyancy gain)
+14.5%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Shear force

*Caution: On a vertical wall, the magnet holds just ~20% of its nominal pull.

2. Plate thickness effect

*Thin steel (e.g. computer case) drastically weakens 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) = 0.74

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
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%
Ecology and recycling (GPSR)
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: 010496-2026
Quick Unit Converter
Magnet pull force

Field Strength

Other offers

The offered product is an extremely powerful cylindrical magnet, produced from modern NdFeB material, which, at dimensions of Ø70x50 mm, guarantees maximum efficiency. This specific item boasts a tolerance of ±0.1mm and industrial build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with significant force (approx. 168.21 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Moreover, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It successfully proves itself in DIY projects, advanced automation, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 1650.14 N with a weight of only 1443.17 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure stability in industry, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering a great economic balance and operational stability. If you need the strongest magnets in the same volume (Ø70x50), 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 50 mm. The value of 1650.14 N means that the magnet is capable of holding a weight many times exceeding its own mass of 1443.17 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 70 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 through the diameter if your project requires it.

Pros as well as cons of neodymium magnets.

Advantages

Besides their stability, neodymium magnets are valued for these benefits:
  • They retain magnetic properties for almost 10 years – the drop is just ~1% (in theory),
  • Neodymium magnets are distinguished by exceptionally resistant to loss of magnetic properties caused by magnetic disturbances,
  • The use of an elegant finish of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • The surface of neodymium magnets generates a powerful magnetic field – this is one of their assets,
  • Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
  • Considering the ability of flexible shaping and adaptation to custom needs, magnetic components can be manufactured in a variety of shapes and sizes, which expands the range of possible applications,
  • Wide application in electronics industry – they are used in mass storage devices, brushless drives, medical devices, and industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in miniature devices

Disadvantages

Cons of neodymium magnets: weaknesses and usage proposals
  • They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only shields the magnet but also increases its resistance to damage
  • When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their strength 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
  • When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
  • Due to limitations in creating threads and complex shapes in magnets, we recommend using casing - magnetic mount.
  • Possible danger related to microscopic parts of magnets can be dangerous, if swallowed, which becomes key in the context of child safety. It is also worth noting that small components of these magnets are able to be problematic in diagnostics medical in case of swallowing.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which hinders application in large quantities

Lifting parameters

Maximum holding power of the magnet – what it depends on?

Breakaway force was determined for ideal contact conditions, taking into account:
  • on a base made of structural steel, effectively closing the magnetic flux
  • with a cross-section no less than 10 mm
  • with a plane perfectly flat
  • with total lack of distance (without impurities)
  • under axial force vector (90-degree angle)
  • at conditions approx. 20°C

Key elements affecting lifting force

Bear in mind that the application force will differ depending on elements below, in order of importance:
  • Air gap (between the magnet and the plate), since even a very small clearance (e.g. 0.5 mm) leads to a drastic drop in force by up to 50% (this also applies to varnish, rust or debris).
  • Load vector – highest force is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is usually several times lower (approx. 1/5 of the lifting capacity).
  • Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
  • Material type – the best choice is high-permeability steel. Stainless steels may attract less.
  • Surface structure – the smoother and more polished the surface, the larger the contact zone and higher the lifting capacity. Roughness acts like micro-gaps.
  • Thermal conditions – neodymium magnets have a negative temperature coefficient. When it is hot they are weaker, and in frost gain strength (up to a certain limit).

Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under perpendicular forces, however under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet’s surface and the plate reduces the load capacity.

Safe handling of neodymium magnets
Conscious usage

Handle magnets with awareness. Their huge power can shock even experienced users. Plan your moves and do not underestimate their force.

No play value

Always store magnets away from children. Ingestion danger is high, and the effects of magnets clamping inside the body are very dangerous.

Fire risk

Fire warning: Rare earth powder is explosive. Avoid machining magnets in home conditions as this risks ignition.

Threat to electronics

Device Safety: Strong magnets can ruin payment cards and delicate electronics (heart implants, medical aids, mechanical watches).

Finger safety

Big blocks can break fingers in a fraction of a second. Never put your hand betwixt two attracting surfaces.

Metal Allergy

Allergy Notice: The nickel-copper-nickel coating contains nickel. If redness occurs, cease handling magnets and use protective gear.

Beware of splinters

NdFeB magnets are sintered ceramics, meaning they are very brittle. Collision of two magnets will cause them breaking into shards.

Precision electronics

Navigation devices and mobile phones are highly susceptible to magnetism. Direct contact with a strong magnet can ruin the internal compass in your phone.

Pacemakers

For implant holders: Strong magnetic fields disrupt medical devices. Maintain minimum 30 cm distance or ask another person to handle the magnets.

Demagnetization risk

Regular neodymium magnets (N-type) lose magnetization when the temperature goes above 80°C. The loss of strength is permanent.

Important! 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