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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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Detailed 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

Engineering analysis of the magnet - technical parameters

The following data constitute the result of a physical simulation. Results are based on algorithms for the class Nd2Fe14B. Real-world performance may differ from theoretical values. Treat these data as a supplementary guide during assembly planning.

Table 1: Static force (pull vs gap) - 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 pounds
170640.0 g / 1674.0 N
critical level
1 mm 3643 Gs
364.3 mT
163.71 kg / 360.93 pounds
163714.9 g / 1606.0 N
critical level
2 mm 3563 Gs
356.3 mT
156.65 kg / 345.35 pounds
156647.8 g / 1536.7 N
critical level
3 mm 3482 Gs
348.2 mT
149.55 kg / 329.71 pounds
149554.1 g / 1467.1 N
critical level
5 mm 3314 Gs
331.4 mT
135.46 kg / 298.63 pounds
135457.0 g / 1328.8 N
critical level
10 mm 2880 Gs
288.0 mT
102.34 kg / 225.63 pounds
102343.3 g / 1004.0 N
critical level
15 mm 2457 Gs
245.7 mT
74.47 kg / 164.17 pounds
74468.4 g / 730.5 N
critical level
20 mm 2069 Gs
206.9 mT
52.79 kg / 116.38 pounds
52789.9 g / 517.9 N
critical level
30 mm 1439 Gs
143.9 mT
25.53 kg / 56.29 pounds
25534.0 g / 250.5 N
critical level
50 mm 704 Gs
70.4 mT
6.11 kg / 13.48 pounds
6115.0 g / 60.0 N
warning

Table 2: Sliding hold (vertical surface)
MW 80x30 / N38

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

Table 3: Wall mounting (shearing) - 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 pounds
51192.0 g / 502.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
34.13 kg / 75.24 pounds
34128.0 g / 334.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
17.06 kg / 37.62 pounds
17064.0 g / 167.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
85.32 kg / 188.10 pounds
85320.0 g / 837.0 N

Table 4: Material efficiency (saturation) - sheet metal selection
MW 80x30 / N38

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

Table 5: Working in heat (material behavior) - power drop
MW 80x30 / N38

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

Table 6: Two magnets (repulsion) - field range
MW 80x30 / N38

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

Table 7: Safety (HSE) (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
Mechanical watch 20 Gs (2.0 mT) 23.0 cm
Mobile device 40 Gs (4.0 mT) 18.0 cm
Car key 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: Collisions (cracking risk) - warning
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: Underwater work (magnet fishing)
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. Sliding resistance

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

2. Steel saturation

*Thin steel (e.g. computer case) drastically reduces the holding force.

3. Heat tolerance

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

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

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

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
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%
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

Other offers

The presented product is an extremely powerful cylinder magnet, produced from advanced NdFeB material, which, with dimensions of Ø80x30 mm, guarantees maximum efficiency. The MW 80x30 / N38 component features an accuracy of ±0.1mm and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 170.64 kg), this product is in stock from our European logistics center, ensuring lightning-fast order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is ideal for building generators, advanced sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the high power of 1673.99 N with a weight of only 1130.97 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 80.1 mm) using epoxy glues. To ensure long-term durability in industry, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most popular standard for professional neodymium magnets, offering an optimal price-to-power ratio 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 available off-the-shelf in our store.
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 secures it against oxidation, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 30 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 as well as disadvantages of neodymium magnets.

Strengths

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • They have constant strength, and over more than ten years their attraction force decreases symbolically – ~1% (in testing),
  • They maintain their magnetic properties even under strong external field,
  • In other words, due to the aesthetic surface of nickel, the element becomes visually attractive,
  • They feature high magnetic induction at the operating surface, making them more effective,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
  • In view of the possibility of free forming and adaptation to unique solutions, neodymium magnets can be manufactured in a variety of forms and dimensions, which expands the range of possible applications,
  • Significant place in innovative solutions – they are utilized in hard drives, electromotive mechanisms, medical devices, and multitasking production systems.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Disadvantages of NdFeB magnets:
  • At very strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (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 extremely resistant to heat
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • Limited ability of creating nuts in the magnet and complicated forms - recommended is a housing - mounting mechanism.
  • Potential hazard related to microscopic parts of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. Additionally, small components of these products can be problematic in diagnostics medical after entering the body.
  • With mass production the cost of neodymium magnets can be a barrier,

Lifting parameters

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

Magnet power is the result of a measurement for ideal contact conditions, including:
  • on a block made of mild steel, effectively closing the magnetic flux
  • with a cross-section minimum 10 mm
  • characterized by even structure
  • under conditions of gap-free contact (surface-to-surface)
  • during detachment in a direction perpendicular to the plane
  • at conditions approx. 20°C

Determinants of lifting force in real conditions

In practice, the actual lifting capacity is determined by a number of factors, ranked from crucial:
  • Distance – the presence of foreign body (paint, tape, gap) acts as an insulator, which reduces power rapidly (even by 50% at 0.5 mm).
  • Loading method – declared lifting capacity refers to pulling vertically. When slipping, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
  • Plate thickness – insufficiently thick plate causes magnetic saturation, causing part of the power to be lost into the air.
  • Steel grade – the best choice is high-permeability steel. Hardened steels may have worse magnetic properties.
  • Base smoothness – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
  • Temperature – temperature increase results in weakening of induction. It is worth remembering the maximum operating temperature for a given model.

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

H&S for magnets
Finger safety

Risk of injury: The pulling power is so great that it can result in hematomas, pinching, and broken bones. Use thick gloves.

Implant safety

People with a heart stimulator must keep an absolute distance from magnets. The magnetic field can disrupt the operation of the implant.

Cards and drives

Device Safety: Strong magnets can damage data carriers and sensitive devices (pacemakers, medical aids, timepieces).

Impact on smartphones

A powerful magnetic field interferes with the functioning of compasses in phones and navigation systems. Do not bring magnets close to a smartphone to prevent damaging the sensors.

Do not drill into magnets

Fire hazard: Neodymium dust is highly flammable. Avoid machining magnets in home conditions as this risks ignition.

Operating temperature

Standard neodymium magnets (grade N) lose power when the temperature surpasses 80°C. Damage is permanent.

Sensitization to coating

It is widely known that nickel (the usual finish) is a strong allergen. If your skin reacts to metals, avoid touching magnets with bare hands or choose versions in plastic housing.

Eye protection

NdFeB magnets are ceramic materials, which means they are very brittle. Collision of two magnets leads to them cracking into shards.

Do not underestimate power

Handle magnets with awareness. Their huge power can shock even professionals. Stay alert and do not underestimate their force.

Adults only

These products are not suitable for play. Swallowing multiple magnets may result in them connecting inside the digestive tract, which poses a critical condition and requires immediate surgery.

Important! Learn more about risks in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98