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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

bulk discounts:

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price from 1 pcs
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415.00 ZŁ
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Give us a call +48 22 499 98 98 otherwise get in touch through form our website.
Force as well as appearance of a magnet can be analyzed on our magnetic calculator.

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Technical specification of the product - 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 simulation of the product - technical parameters

Presented values constitute the direct effect of a engineering analysis. Results are based on models for the class Nd2Fe14B. Operational performance may deviate from the simulation results. Please consider these data as a reference point during assembly planning.

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

Table 2: Shear force (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 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: Wall mounting (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: Steel thickness (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 stability (stability) - 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 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: Two magnets (repulsion) - field range
MW 80x30 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear 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: 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
Timepiece 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: Dynamics (kinetic energy) - 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: Construction 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: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Vertical hold

*Warning: On a vertical wall, the magnet holds only ~20% of its max power.

2. Efficiency vs thickness

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

3. Power loss vs temp

*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

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
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%
Environmental data
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
Magnet pull force

Magnetic Induction

See also deals

The presented product is an incredibly powerful cylindrical magnet, manufactured from modern NdFeB material, which, with dimensions of Ø80x30 mm, guarantees the highest energy density. The MW 80x30 / N38 component is characterized by a tolerance of ±0.1mm and professional build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 170.64 kg), this product is in stock from our warehouse in Poland, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
This model is perfect for building electric motors, advanced sensors, and efficient magnetic separators, where field concentration 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.
Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks chipping the coating 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 durability of the connection.
Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. 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 warehouse.
This model is characterized by dimensions Ø80x30 mm, which, at a weight of 1130.97 g, makes it an element with high magnetic energy density. The key parameter here is the holding force amounting to approximately 170.64 kg (force ~1673.99 N), which, with such compact dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.
This cylinder 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.

Pros as well as cons of rare earth magnets.

Advantages

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • Their magnetic field is maintained, and after around 10 years it drops only by ~1% (according to research),
  • They possess excellent resistance to magnetism drop as a result of opposing magnetic fields,
  • The use of an aesthetic layer of noble metals (nickel, gold, silver) causes the element to present itself better,
  • The surface of neodymium magnets generates a strong magnetic field – this is one of their assets,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
  • Thanks to flexibility in constructing and the capacity to modify to complex applications,
  • Fundamental importance in innovative solutions – they are commonly used in mass storage devices, electric drive systems, precision medical tools, and technologically advanced constructions.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Cons

What to avoid - cons of neodymium magnets: tips and applications.
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a special holder, which not only protects them against impacts but also raises their durability
  • NdFeB magnets lose force 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 very resistant to heat
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation as well as corrosion.
  • Due to limitations in producing threads and complex forms in magnets, we recommend using a housing - magnetic mechanism.
  • Potential hazard to health – tiny shards of magnets are risky, if swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, tiny parts of these devices are able to disrupt the diagnostic process medical when they are in the body.
  • Due to neodymium price, their price is relatively high,

Pull force analysis

Maximum lifting force for a neodymium magnet – what contributes to it?

The lifting capacity listed is a measurement result executed under specific, ideal conditions:
  • using a plate made of low-carbon steel, serving as a magnetic yoke
  • possessing a thickness of min. 10 mm to avoid saturation
  • with an polished contact surface
  • with total lack of distance (no coatings)
  • for force acting at a right angle (in the magnet axis)
  • at conditions approx. 20°C

Impact of factors on magnetic holding capacity in practice

During everyday use, the actual lifting capacity depends on a number of factors, listed from the most important:
  • Space between surfaces – even a fraction of a millimeter of separation (caused e.g. by veneer or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Steel thickness – too thin sheet does not accept the full field, causing part of the flux to be lost to the other side.
  • Chemical composition of the base – mild steel gives the best results. Alloy admixtures lower magnetic properties and lifting capacity.
  • Surface structure – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
  • Thermal factor – high temperature weakens magnetic field. Exceeding the limit temperature can permanently damage the magnet.

Lifting capacity was assessed with the use of a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, in contrast under parallel forces the holding force is lower. Additionally, even a small distance between the magnet and the plate lowers the load capacity.

H&S for magnets
Danger to pacemakers

Medical warning: Neodymium magnets can turn off heart devices and defibrillators. Stay away if you have medical devices.

Crushing force

Large magnets can smash fingers instantly. Under no circumstances place your hand betwixt two attracting surfaces.

Risk of cracking

Despite metallic appearance, the material is brittle and cannot withstand shocks. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Swallowing risk

Only for adults. Tiny parts pose a choking risk, causing serious injuries. Store out of reach of kids and pets.

Electronic devices

Avoid bringing magnets close to a purse, computer, or TV. The magnetic field can destroy these devices and erase data from cards.

Dust is flammable

Fire warning: Neodymium dust is explosive. Do not process magnets without safety gear as this risks ignition.

Sensitization to coating

Nickel alert: The nickel-copper-nickel coating contains nickel. If skin irritation appears, cease working with magnets and use protective gear.

Maximum temperature

Regular neodymium magnets (grade N) lose power when the temperature goes above 80°C. This process is irreversible.

Handling guide

Handle with care. Rare earth magnets act from a long distance and connect with huge force, often quicker than you can react.

Keep away from electronics

A powerful magnetic field interferes with the functioning of magnetometers in smartphones and navigation systems. Do not bring magnets close to a device to avoid breaking the sensors.

Attention! Details 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