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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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Force and form of a magnet can be reviewed using our modular calculator.

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Physical properties - 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

Engineering simulation of the assembly - report

These information represent the result of a mathematical calculation. Values rely on models for the material Nd2Fe14B. Operational parameters might slightly differ from theoretical values. Use these calculations as a supplementary guide during assembly planning.

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: Shear 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 (sliding) - behavior on slippery surfaces
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) - power losses
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: Working in heat (stability) - resistance threshold
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: Magnet-Magnet interaction (repulsion) - field collision
MW 70x50 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (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: Safety (HSE) (electronics) - precautionary measures
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
Phone / Smartphone 40 Gs (4.0 mT) 19.0 cm
Car key 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: Collisions (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 (Flux)
MW 70x50 / N38

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

Table 11: Submerged application
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: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Shear force

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

2. Steel saturation

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

3. Temperature resistance

*For N38 grade, the critical limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.74

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
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%
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
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Magnet pull force

Magnetic Field

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The offered product is a very strong rod magnet, manufactured from advanced NdFeB material, which, with dimensions of Ø70x50 mm, guarantees optimal power. This specific item features an accuracy of ±0.1mm and industrial build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 168.21 kg), this product is in stock from our European logistics center, ensuring quick order fulfillment. Additionally, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced automation, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power of 1650.14 N with a weight of only 1443.17 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.
Since our magnets have a tolerance of ±0.1mm, the best method is to glue them into holes with a slightly larger diameter (e.g., 70.1 mm) using two-component epoxy glues. To ensure long-term durability in automation, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Magnets N38 are suitable for 90% of applications in automation and machine building, where extreme miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø70x50), 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 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 external factors, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 50 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.

Advantages and disadvantages of Nd2Fe14B magnets.

Advantages

Besides their immense strength, neodymium magnets offer the following advantages:
  • Their strength is durable, and after approximately ten years it decreases only by ~1% (according to research),
  • They feature excellent resistance to magnetic field loss as a result of external fields,
  • Thanks to the metallic finish, the surface of nickel, gold-plated, or silver gives an elegant appearance,
  • Magnetic induction on the working layer of the magnet turns out to be maximum,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to modularity in forming and the capacity to customize to client solutions,
  • Universal use in future technologies – they serve a role in data components, electric motors, diagnostic systems, as well as complex engineering applications.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Disadvantages

Problematic aspects of neodymium magnets: weaknesses and usage proposals
  • To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • NdFeB magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • 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 and corrosion.
  • Limited possibility of producing threads in the magnet and complicated forms - recommended is a housing - mounting mechanism.
  • Possible danger resulting from small fragments of magnets can be dangerous, if swallowed, which becomes key in the context of child health protection. It is also worth noting that small elements of these devices are able to disrupt the diagnostic process medical in case of swallowing.
  • Due to complex production process, their price is relatively high,

Pull force analysis

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

The specified lifting capacity represents the peak performance, measured under ideal test conditions, specifically:
  • using a plate made of low-carbon steel, serving as a magnetic yoke
  • whose thickness equals approx. 10 mm
  • with a plane cleaned and smooth
  • with zero gap (without impurities)
  • under axial application of breakaway force (90-degree angle)
  • in temp. approx. 20°C

Lifting capacity in practice – influencing factors

In practice, the actual lifting capacity is determined by several key aspects, listed from most significant:
  • Air gap (between the magnet and the metal), because even a very small distance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to varnish, rust or dirt).
  • Force direction – note that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the maximum value.
  • Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of generating force.
  • Material type – the best choice is high-permeability steel. Stainless steels may attract less.
  • Surface quality – the more even the surface, the better the adhesion and higher the lifting capacity. Unevenness acts like micro-gaps.
  • Thermal factor – high temperature weakens pulling force. Too high temperature can permanently demagnetize the magnet.

Lifting capacity was assessed with the use of a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, in contrast under attempts to slide the magnet the load capacity is reduced by as much as 5 times. In addition, even a minimal clearance between the magnet and the plate decreases the holding force.

Precautions when working with NdFeB magnets
Physical harm

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

Nickel allergy

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If an allergic reaction happens, immediately stop working with magnets and wear gloves.

Keep away from electronics

Remember: rare earth magnets generate a field that confuses precision electronics. Maintain a separation from your phone, tablet, and GPS.

Handling guide

Use magnets consciously. Their huge power can surprise even experienced users. Plan your moves and do not underestimate their force.

Implant safety

Medical warning: Neodymium magnets can deactivate heart devices and defibrillators. Do not approach if you have medical devices.

Demagnetization risk

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

Data carriers

Very strong magnetic fields can erase data on credit cards, HDDs, and storage devices. Keep a distance of min. 10 cm.

Choking Hazard

Product intended for adults. Tiny parts pose a choking risk, causing intestinal necrosis. Store out of reach of kids and pets.

Combustion hazard

Mechanical processing of neodymium magnets poses a fire hazard. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Magnet fragility

Despite metallic appearance, the material is brittle and not impact-resistant. Do not hit, as the magnet may shatter into hazardous fragments.

Safety First! More info about hazards in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98