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MW 80x30 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010100

GTIN/EAN: 5906301810995

5.00

Diameter Ø

80 mm [±0,1 mm]

Height

30 mm [±0,1 mm]

Weight

1130.97 g

Magnetization Direction

↑ axial

Load capacity

170.64 kg / 1673.99 N

Magnetic Induction

371.95 mT / 3720 Gs

Coating

[NiCuNi] Nickel

415.00 with VAT / pcs + price for transport

337.40 ZŁ net + 23% VAT / pcs

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Technical specification - MW 80x30 / N38 - cylindrical magnet

Specification / characteristics - MW 80x30 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010100
GTIN/EAN 5906301810995
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 80 mm [±0,1 mm]
Height 30 mm [±0,1 mm]
Weight 1130.97 g
Magnetization Direction ↑ axial
Load capacity ~ ? 170.64 kg / 1673.99 N
Magnetic Induction ~ ? 371.95 mT / 3720 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 80x30 / 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 simulation of the assembly - technical parameters

Presented values are the outcome of a physical simulation. Values were calculated on algorithms for the class Nd2Fe14B. Real-world parameters may differ from theoretical values. Treat these calculations as a supplementary guide when designing systems.

Table 1: Static force (pull vs distance) - power drop
MW 80x30 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3719 Gs
371.9 mT
170.64 kg / 376.20 LBS
170640.0 g / 1674.0 N
crushing
1 mm 3643 Gs
364.3 mT
163.71 kg / 360.93 LBS
163714.9 g / 1606.0 N
crushing
2 mm 3563 Gs
356.3 mT
156.65 kg / 345.35 LBS
156647.8 g / 1536.7 N
crushing
3 mm 3482 Gs
348.2 mT
149.55 kg / 329.71 LBS
149554.1 g / 1467.1 N
crushing
5 mm 3314 Gs
331.4 mT
135.46 kg / 298.63 LBS
135457.0 g / 1328.8 N
crushing
10 mm 2880 Gs
288.0 mT
102.34 kg / 225.63 LBS
102343.3 g / 1004.0 N
crushing
15 mm 2457 Gs
245.7 mT
74.47 kg / 164.17 LBS
74468.4 g / 730.5 N
crushing
20 mm 2069 Gs
206.9 mT
52.79 kg / 116.38 LBS
52789.9 g / 517.9 N
crushing
30 mm 1439 Gs
143.9 mT
25.53 kg / 56.29 LBS
25534.0 g / 250.5 N
crushing
50 mm 704 Gs
70.4 mT
6.11 kg / 13.48 LBS
6115.0 g / 60.0 N
strong

Table 2: Shear capacity (wall)
MW 80x30 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 34.13 kg / 75.24 LBS
34128.0 g / 334.8 N
1 mm Stal (~0.2) 32.74 kg / 72.18 LBS
32742.0 g / 321.2 N
2 mm Stal (~0.2) 31.33 kg / 69.07 LBS
31330.0 g / 307.3 N
3 mm Stal (~0.2) 29.91 kg / 65.94 LBS
29910.0 g / 293.4 N
5 mm Stal (~0.2) 27.09 kg / 59.73 LBS
27092.0 g / 265.8 N
10 mm Stal (~0.2) 20.47 kg / 45.12 LBS
20468.0 g / 200.8 N
15 mm Stal (~0.2) 14.89 kg / 32.84 LBS
14894.0 g / 146.1 N
20 mm Stal (~0.2) 10.56 kg / 23.28 LBS
10558.0 g / 103.6 N
30 mm Stal (~0.2) 5.11 kg / 11.26 LBS
5106.0 g / 50.1 N
50 mm Stal (~0.2) 1.22 kg / 2.69 LBS
1222.0 g / 12.0 N

Table 3: Vertical assembly (sliding) - vertical pull
MW 80x30 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
51.19 kg / 112.86 LBS
51192.0 g / 502.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
34.13 kg / 75.24 LBS
34128.0 g / 334.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
17.06 kg / 37.62 LBS
17064.0 g / 167.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
85.32 kg / 188.10 LBS
85320.0 g / 837.0 N

Table 4: Material efficiency (saturation) - power losses
MW 80x30 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
3%
5.69 kg / 12.54 LBS
5688.0 g / 55.8 N
1 mm
8%
14.22 kg / 31.35 LBS
14220.0 g / 139.5 N
2 mm
17%
28.44 kg / 62.70 LBS
28440.0 g / 279.0 N
3 mm
25%
42.66 kg / 94.05 LBS
42660.0 g / 418.5 N
5 mm
42%
71.10 kg / 156.75 LBS
71100.0 g / 697.5 N
10 mm
83%
142.20 kg / 313.50 LBS
142200.0 g / 1395.0 N
11 mm
92%
156.42 kg / 344.85 LBS
156420.0 g / 1534.5 N
12 mm
100%
170.64 kg / 376.20 LBS
170640.0 g / 1674.0 N

Table 5: Thermal resistance (material behavior) - thermal limit
MW 80x30 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 170.64 kg / 376.20 LBS
170640.0 g / 1674.0 N
OK
40 °C -2.2% 166.89 kg / 367.92 LBS
166885.9 g / 1637.2 N
OK
60 °C -4.4% 163.13 kg / 359.64 LBS
163131.8 g / 1600.3 N
80 °C -6.6% 159.38 kg / 351.37 LBS
159377.8 g / 1563.5 N
100 °C -28.8% 121.50 kg / 267.85 LBS
121495.7 g / 1191.9 N

Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 80x30 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 428.66 kg / 945.03 LBS
5 157 Gs
64.30 kg / 141.76 LBS
64299 g / 630.8 N
N/A
1 mm 420.08 kg / 926.12 LBS
7 364 Gs
63.01 kg / 138.92 LBS
63012 g / 618.1 N
378.07 kg / 833.51 LBS
~0 Gs
2 mm 411.26 kg / 906.68 LBS
7 286 Gs
61.69 kg / 136.00 LBS
61690 g / 605.2 N
370.14 kg / 816.01 LBS
~0 Gs
3 mm 402.40 kg / 887.15 LBS
7 207 Gs
60.36 kg / 133.07 LBS
60360 g / 592.1 N
362.16 kg / 798.43 LBS
~0 Gs
5 mm 384.60 kg / 847.90 LBS
7 046 Gs
57.69 kg / 127.19 LBS
57690 g / 565.9 N
346.14 kg / 763.11 LBS
~0 Gs
10 mm 340.28 kg / 750.18 LBS
6 627 Gs
51.04 kg / 112.53 LBS
51042 g / 500.7 N
306.25 kg / 675.17 LBS
~0 Gs
20 mm 257.09 kg / 566.80 LBS
5 761 Gs
38.56 kg / 85.02 LBS
38564 g / 378.3 N
231.38 kg / 510.12 LBS
~0 Gs
50 mm 92.55 kg / 204.04 LBS
3 456 Gs
13.88 kg / 30.61 LBS
13883 g / 136.2 N
83.30 kg / 183.63 LBS
~0 Gs
60 mm 64.14 kg / 141.41 LBS
2 877 Gs
9.62 kg / 21.21 LBS
9622 g / 94.4 N
57.73 kg / 127.27 LBS
~0 Gs
70 mm 44.44 kg / 97.98 LBS
2 395 Gs
6.67 kg / 14.70 LBS
6666 g / 65.4 N
40.00 kg / 88.18 LBS
~0 Gs
80 mm 30.93 kg / 68.19 LBS
1 998 Gs
4.64 kg / 10.23 LBS
4639 g / 45.5 N
27.84 kg / 61.37 LBS
~0 Gs
90 mm 21.69 kg / 47.82 LBS
1 673 Gs
3.25 kg / 7.17 LBS
3254 g / 31.9 N
19.52 kg / 43.04 LBS
~0 Gs
100 mm 15.36 kg / 33.87 LBS
1 408 Gs
2.30 kg / 5.08 LBS
2304 g / 22.6 N
13.83 kg / 30.48 LBS
~0 Gs

Table 7: Hazards (implants) - precautionary measures
MW 80x30 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 37.5 cm
Hearing aid 10 Gs (1.0 mT) 29.5 cm
Timepiece 20 Gs (2.0 mT) 23.0 cm
Mobile device 40 Gs (4.0 mT) 18.0 cm
Remote 50 Gs (5.0 mT) 16.5 cm
Payment card 400 Gs (40.0 mT) 7.0 cm
HDD hard drive 600 Gs (60.0 mT) 5.5 cm

Table 8: Impact energy (cracking risk) - collision effects
MW 80x30 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 16.39 km/h
(4.55 m/s)
11.72 J
30 mm 23.38 km/h
(6.49 m/s)
23.85 J
50 mm 28.31 km/h
(7.86 m/s)
34.98 J
100 mm 39.22 km/h
(10.90 m/s)
67.13 J

Table 9: Coating parameters (durability)
MW 80x30 / 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: Electrical data (Flux)
MW 80x30 / N38

Parameter Value SI Unit / Description
Magnetic Flux 194 600 Mx 1946.0 µWb
Pc Coefficient 0.48 Low (Flat)

Table 11: Submerged application
MW 80x30 / N38

Environment Effective steel pull Effect
Air (land) 170.64 kg Standard
Water (riverbed) 195.38 kg
(+24.74 kg buoyancy gain)
+14.5%
Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Vertical hold

*Caution: On a vertical surface, the magnet retains only a fraction of its perpendicular strength.

2. Steel saturation

*Thin metal sheet (e.g. computer case) severely reduces the holding force.

3. Heat tolerance

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.48

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
Material specification
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: 010100-2026
Quick Unit Converter
Force (pull)

Magnetic Field

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The presented product is an exceptionally strong cylindrical magnet, composed of modern NdFeB material, which, at dimensions of Ø80x30 mm, guarantees maximum efficiency. The MW 80x30 / N38 model features an accuracy of ±0.1mm and professional build quality, making it an ideal solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 170.64 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Additionally, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
It finds application in modeling, advanced robotics, and broadly understood industry, serving as a positioning or actuating element. Thanks to the pull force of 1673.99 N with a weight of only 1130.97 g, this rod is indispensable in miniature devices and wherever low weight is crucial.
Since our magnets have a tolerance of ±0.1mm, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 80.1 mm) using epoxy glues. To ensure stability in automation, 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 frequently chosen standard for industrial neodymium magnets, offering a great economic balance and operational stability. If you need even stronger magnets in the same volume (Ø80x30), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 80 mm and height 30 mm. The value of 1673.99 N means that the magnet is capable of holding a weight many times exceeding its own mass of 1130.97 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 80 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.

Strengths and weaknesses of rare earth magnets.

Benefits

Besides their exceptional magnetic power, neodymium magnets offer the following advantages:
  • They have constant strength, and over nearly 10 years their attraction force decreases symbolically – ~1% (according to theory),
  • They maintain their magnetic properties even under close interference source,
  • A magnet with a smooth gold surface looks better,
  • Neodymium magnets generate maximum magnetic induction on a small surface, which increases force concentration,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Due to the potential of free molding and adaptation to individualized requirements, magnetic components can be created in a wide range of forms and dimensions, which expands the range of possible applications,
  • Significant place in advanced technology sectors – they serve a role in HDD drives, drive modules, medical devices, as well as industrial machines.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

Problematic aspects of neodymium magnets: application proposals
  • At strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • NdFeB magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape and 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
  • Magnets exposed to a humid environment can rust. Therefore while using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • Due to limitations in realizing nuts and complicated forms in magnets, we propose using cover - magnetic holder.
  • Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child safety. Furthermore, tiny parts of these magnets can be problematic in diagnostics medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Lifting parameters

Maximum magnetic pulling forcewhat it depends on?

The load parameter shown refers to the limit force, recorded under laboratory conditions, namely:
  • on a block made of structural steel, optimally conducting the magnetic field
  • with a thickness of at least 10 mm
  • with a plane perfectly flat
  • under conditions of ideal adhesion (surface-to-surface)
  • during detachment in a direction perpendicular to the plane
  • at room temperature

Practical lifting capacity: influencing factors

Bear in mind that the application force will differ subject to elements below, starting with the most relevant:
  • Gap (between the magnet and the plate), as even a microscopic distance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to varnish, corrosion or dirt).
  • Load vector – highest force is available only during perpendicular pulling. The shear force of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
  • Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of generating force.
  • Metal type – not every steel attracts identically. High carbon content worsen the interaction with the magnet.
  • Surface structure – the more even the surface, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
  • Operating temperature – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).

Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, whereas under shearing force the load capacity is reduced by as much as 75%. Additionally, even a minimal clearance between the magnet and the plate lowers the holding force.

Warnings
Magnet fragility

Neodymium magnets are sintered ceramics, which means they are prone to chipping. Impact of two magnets leads to them breaking into small pieces.

Permanent damage

Standard neodymium magnets (N-type) lose power when the temperature exceeds 80°C. This process is irreversible.

Crushing risk

Watch your fingers. Two large magnets will join instantly with a force of several hundred kilograms, crushing anything in their path. Be careful!

Precision electronics

A powerful magnetic field negatively affects the operation of magnetometers in smartphones and navigation systems. Maintain magnets near a device to prevent breaking the sensors.

Danger to the youngest

Neodymium magnets are not intended for children. Eating several magnets may result in them attracting across intestines, which constitutes a critical condition and necessitates immediate surgery.

Nickel allergy

Medical facts indicate that the nickel plating (standard magnet coating) is a strong allergen. If your skin reacts to metals, avoid touching magnets with bare hands or opt for versions in plastic housing.

Health Danger

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

Handling rules

Be careful. Neodymium magnets attract from a long distance and snap with massive power, often faster than you can react.

Mechanical processing

Fire hazard: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this may cause fire.

Safe distance

Powerful magnetic fields can destroy records on payment cards, hard drives, and storage devices. Stay away of at least 10 cm.

Caution! Need more info? Check our post: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98