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MW 50x20 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010080

GTIN/EAN: 5906301810797

Diameter Ø

50 mm [±0,1 mm]

Height

20 mm [±0,1 mm]

Weight

294.52 g

Magnetization Direction

↑ axial

Load capacity

70.10 kg / 687.66 N

Magnetic Induction

387.23 mT / 3872 Gs

Coating

[NiCuNi] Nickel

106.96 with VAT / pcs + price for transport

86.96 ZŁ net + 23% VAT / pcs

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Technical details - MW 50x20 / N38 - cylindrical magnet

Specification / characteristics - MW 50x20 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010080
GTIN/EAN 5906301810797
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 50 mm [±0,1 mm]
Height 20 mm [±0,1 mm]
Weight 294.52 g
Magnetization Direction ↑ axial
Load capacity ~ ? 70.10 kg / 687.66 N
Magnetic Induction ~ ? 387.23 mT / 3872 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 50x20 / 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 - report

Presented data represent the outcome of a physical analysis. Values rely on algorithms for the material Nd2Fe14B. Real-world conditions may differ from theoretical values. Use these data as a preliminary roadmap during assembly planning.

Table 1: Static force (pull vs gap) - interaction chart
MW 50x20 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3872 Gs
387.2 mT
70.10 kg / 154.54 pounds
70100.0 g / 687.7 N
crushing
1 mm 3740 Gs
374.0 mT
65.41 kg / 144.20 pounds
65408.0 g / 641.7 N
crushing
2 mm 3601 Gs
360.1 mT
60.65 kg / 133.72 pounds
60652.7 g / 595.0 N
crushing
3 mm 3459 Gs
345.9 mT
55.95 kg / 123.35 pounds
55950.5 g / 548.9 N
crushing
5 mm 3168 Gs
316.8 mT
46.94 kg / 103.47 pounds
46935.3 g / 460.4 N
crushing
10 mm 2460 Gs
246.0 mT
28.31 kg / 62.40 pounds
28306.3 g / 277.7 N
crushing
15 mm 1855 Gs
185.5 mT
16.10 kg / 35.48 pounds
16095.6 g / 157.9 N
crushing
20 mm 1384 Gs
138.4 mT
8.96 kg / 19.76 pounds
8963.2 g / 87.9 N
strong
30 mm 782 Gs
78.2 mT
2.86 kg / 6.31 pounds
2863.1 g / 28.1 N
strong
50 mm 293 Gs
29.3 mT
0.40 kg / 0.89 pounds
402.4 g / 3.9 N
safe

Table 2: Slippage load (vertical surface)
MW 50x20 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 14.02 kg / 30.91 pounds
14020.0 g / 137.5 N
1 mm Stal (~0.2) 13.08 kg / 28.84 pounds
13082.0 g / 128.3 N
2 mm Stal (~0.2) 12.13 kg / 26.74 pounds
12130.0 g / 119.0 N
3 mm Stal (~0.2) 11.19 kg / 24.67 pounds
11190.0 g / 109.8 N
5 mm Stal (~0.2) 9.39 kg / 20.70 pounds
9388.0 g / 92.1 N
10 mm Stal (~0.2) 5.66 kg / 12.48 pounds
5662.0 g / 55.5 N
15 mm Stal (~0.2) 3.22 kg / 7.10 pounds
3220.0 g / 31.6 N
20 mm Stal (~0.2) 1.79 kg / 3.95 pounds
1792.0 g / 17.6 N
30 mm Stal (~0.2) 0.57 kg / 1.26 pounds
572.0 g / 5.6 N
50 mm Stal (~0.2) 0.08 kg / 0.18 pounds
80.0 g / 0.8 N

Table 3: Vertical assembly (shearing) - vertical pull
MW 50x20 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
21.03 kg / 46.36 pounds
21030.0 g / 206.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
14.02 kg / 30.91 pounds
14020.0 g / 137.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
7.01 kg / 15.45 pounds
7010.0 g / 68.8 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
35.05 kg / 77.27 pounds
35050.0 g / 343.8 N

Table 4: Material efficiency (saturation) - sheet metal selection
MW 50x20 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
3%
2.34 kg / 5.15 pounds
2336.7 g / 22.9 N
1 mm
8%
5.84 kg / 12.88 pounds
5841.7 g / 57.3 N
2 mm
17%
11.68 kg / 25.76 pounds
11683.3 g / 114.6 N
3 mm
25%
17.53 kg / 38.64 pounds
17525.0 g / 171.9 N
5 mm
42%
29.21 kg / 64.39 pounds
29208.3 g / 286.5 N
10 mm
83%
58.42 kg / 128.79 pounds
58416.7 g / 573.1 N
11 mm
92%
64.26 kg / 141.67 pounds
64258.3 g / 630.4 N
12 mm
100%
70.10 kg / 154.54 pounds
70100.0 g / 687.7 N

Table 5: Thermal stability (material behavior) - thermal limit
MW 50x20 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 70.10 kg / 154.54 pounds
70100.0 g / 687.7 N
OK
40 °C -2.2% 68.56 kg / 151.14 pounds
68557.8 g / 672.6 N
OK
60 °C -4.4% 67.02 kg / 147.74 pounds
67015.6 g / 657.4 N
80 °C -6.6% 65.47 kg / 144.34 pounds
65473.4 g / 642.3 N
100 °C -28.8% 49.91 kg / 110.04 pounds
49911.2 g / 489.6 N

Table 6: Two magnets (attraction) - field range
MW 50x20 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 181.46 kg / 400.06 pounds
5 255 Gs
27.22 kg / 60.01 pounds
27220 g / 267.0 N
N/A
1 mm 175.47 kg / 386.84 pounds
7 615 Gs
26.32 kg / 58.03 pounds
26321 g / 258.2 N
157.92 kg / 348.16 pounds
~0 Gs
2 mm 169.32 kg / 373.28 pounds
7 480 Gs
25.40 kg / 55.99 pounds
25398 g / 249.2 N
152.39 kg / 335.96 pounds
~0 Gs
3 mm 163.16 kg / 359.70 pounds
7 343 Gs
24.47 kg / 53.96 pounds
24474 g / 240.1 N
146.84 kg / 323.73 pounds
~0 Gs
5 mm 150.90 kg / 332.67 pounds
7 061 Gs
22.63 kg / 49.90 pounds
22634 g / 222.0 N
135.81 kg / 299.40 pounds
~0 Gs
10 mm 121.50 kg / 267.86 pounds
6 336 Gs
18.22 kg / 40.18 pounds
18225 g / 178.8 N
109.35 kg / 241.07 pounds
~0 Gs
20 mm 73.28 kg / 161.54 pounds
4 921 Gs
10.99 kg / 24.23 pounds
10991 g / 107.8 N
65.95 kg / 145.39 pounds
~0 Gs
50 mm 12.99 kg / 28.63 pounds
2 071 Gs
1.95 kg / 4.29 pounds
1948 g / 19.1 N
11.69 kg / 25.76 pounds
~0 Gs
60 mm 7.41 kg / 16.34 pounds
1 565 Gs
1.11 kg / 2.45 pounds
1112 g / 10.9 N
6.67 kg / 14.71 pounds
~0 Gs
70 mm 4.35 kg / 9.58 pounds
1 198 Gs
0.65 kg / 1.44 pounds
652 g / 6.4 N
3.91 kg / 8.62 pounds
~0 Gs
80 mm 2.62 kg / 5.78 pounds
931 Gs
0.39 kg / 0.87 pounds
393 g / 3.9 N
2.36 kg / 5.20 pounds
~0 Gs
90 mm 1.63 kg / 3.59 pounds
734 Gs
0.24 kg / 0.54 pounds
245 g / 2.4 N
1.47 kg / 3.23 pounds
~0 Gs
100 mm 1.04 kg / 2.30 pounds
587 Gs
0.16 kg / 0.34 pounds
156 g / 1.5 N
0.94 kg / 2.07 pounds
~0 Gs

Table 7: Protective zones (implants) - warnings
MW 50x20 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 24.0 cm
Hearing aid 10 Gs (1.0 mT) 19.0 cm
Timepiece 20 Gs (2.0 mT) 15.0 cm
Mobile device 40 Gs (4.0 mT) 11.5 cm
Remote 50 Gs (5.0 mT) 10.5 cm
Payment card 400 Gs (40.0 mT) 4.5 cm
HDD hard drive 600 Gs (60.0 mT) 3.5 cm

Table 8: Impact energy (cracking risk) - collision effects
MW 50x20 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 19.09 km/h
(5.30 m/s)
4.14 J
30 mm 27.63 km/h
(7.67 m/s)
8.67 J
50 mm 34.92 km/h
(9.70 m/s)
13.85 J
100 mm 49.21 km/h
(13.67 m/s)
27.51 J

Table 9: Anti-corrosion coating durability
MW 50x20 / 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 50x20 / N38

Parameter Value SI Unit / Description
Magnetic Flux 78 540 Mx 785.4 µWb
Pc Coefficient 0.50 Low (Flat)

Table 11: Submerged application
MW 50x20 / N38

Environment Effective steel pull Effect
Air (land) 70.10 kg Standard
Water (riverbed) 80.26 kg
(+10.16 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

*Caution: On a vertical surface, the magnet retains merely ~20% of its max power.

2. Steel thickness impact

*Thin steel (e.g. 0.5mm PC case) significantly limits 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) = 0.50

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
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: 010080-2026
Magnet Unit Converter
Magnet pull force

Field Strength

See also offers

This product is an extremely powerful cylinder magnet, composed of durable NdFeB material, which, with dimensions of Ø50x20 mm, guarantees maximum efficiency. This specific item boasts high dimensional repeatability and industrial build quality, making it an excellent solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 70.10 kg), this product is available off-the-shelf from our European logistics center, ensuring lightning-fast order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in standard 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 positioning or actuating element. Thanks to the pull force of 687.66 N with a weight of only 294.52 g, this rod is indispensable in miniature devices and wherever low weight is crucial.
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 long-term durability in industry, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Magnets NdFeB grade N38 are strong enough for the majority 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 (Ø50x20), 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 50 mm and height 20 mm. The value of 687.66 N means that the magnet is capable of holding a weight many times exceeding its own mass of 294.52 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 50 mm. 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 diametrically if your project requires it.

Strengths and weaknesses of Nd2Fe14B magnets.

Advantages

Apart from their strong holding force, neodymium magnets have these key benefits:
  • They retain full power for almost 10 years – the loss is just ~1% (based on simulations),
  • They maintain their magnetic properties even under strong external field,
  • By applying a smooth layer of silver, the element gains an proper look,
  • They are known for high magnetic induction at the operating surface, making them more effective,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for operation at temperatures reaching 230°C and above...
  • Thanks to freedom in constructing and the ability to modify to individual projects,
  • Key role in advanced technology sectors – they find application in HDD drives, electric motors, diagnostic systems, and other advanced devices.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Drawbacks and weaknesses of neodymium magnets and proposals for their use:
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a strong case, which not only secures them against impacts but also increases their durability
  • We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
  • Due to limitations in creating threads and complicated forms in magnets, we recommend using a housing - magnetic holder.
  • Health risk to health – tiny shards of magnets can be dangerous, if swallowed, which is particularly important in the aspect of protecting the youngest. Furthermore, small components of these devices can complicate diagnosis medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Pull force analysis

Maximum lifting capacity of the magnetwhat it depends on?

The declared magnet strength refers to the limit force, obtained under ideal test conditions, meaning:
  • with the application of a yoke made of special test steel, ensuring full magnetic saturation
  • with a thickness no less than 10 mm
  • with a plane free of scratches
  • under conditions of ideal adhesion (surface-to-surface)
  • under perpendicular force vector (90-degree angle)
  • at standard ambient temperature

Impact of factors on magnetic holding capacity in practice

In real-world applications, the actual holding force is determined by many variables, presented from crucial:
  • Gap (betwixt the magnet and the plate), since even a very small clearance (e.g. 0.5 mm) results in a drastic drop in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the maximum value.
  • Base massiveness – too thin steel causes magnetic saturation, causing part of the flux to be escaped to the other side.
  • Steel grade – the best choice is high-permeability steel. Hardened steels may attract less.
  • Plate texture – ground elements guarantee perfect abutment, which increases force. Uneven metal reduce efficiency.
  • Thermal conditions – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and at low temperatures gain strength (up to a certain limit).

Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under shearing force the holding force is lower. Additionally, even a small distance between the magnet’s surface and the plate lowers the holding force.

Safe handling of neodymium magnets
Thermal limits

Keep cool. Neodymium magnets are susceptible to temperature. If you require operation above 80°C, look for special high-temperature series (H, SH, UH).

Crushing force

Watch your fingers. Two powerful magnets will join instantly with a force of several hundred kilograms, destroying everything in their path. Be careful!

Machining danger

Fire hazard: Neodymium dust is explosive. Avoid machining magnets in home conditions as this may cause fire.

Sensitization to coating

It is widely known that nickel (the usual finish) is a strong allergen. If your skin reacts to metals, refrain from direct skin contact and select encased magnets.

Safe distance

Do not bring magnets near a purse, laptop, or TV. The magnetic field can permanently damage these devices and wipe information from cards.

Magnet fragility

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

Handling guide

Handle with care. Rare earth magnets attract from a long distance and connect with massive power, often faster than you can move away.

Keep away from electronics

Be aware: rare earth magnets generate a field that confuses sensitive sensors. Maintain a separation from your phone, device, and GPS.

Medical interference

People with a ICD have to maintain an absolute distance from magnets. The magnetism can stop the functioning of the implant.

Product not for children

Always store magnets away from children. Ingestion danger is significant, and the effects of magnets connecting inside the body are life-threatening.

Safety First! Need more info? Read our article: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98