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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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Physical properties - 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 magnet - report

The following values constitute the direct effect of a engineering calculation. Values were calculated on algorithms for the class Nd2Fe14B. Actual conditions may differ from theoretical values. Treat these calculations as a reference point for designers.

Table 1: Static pull 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 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: Slippage load (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: Wall mounting (shearing) - behavior on slippery surfaces
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) - 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 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: 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 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 Strength (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) (electronics) - warnings
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
Phone / Smartphone 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: Anti-corrosion coating 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 (Pc)
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%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Wall mount (shear)

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

2. Steel saturation

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

3. Thermal stability

*For standard magnets, the max working temp 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
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: 010100-2026
Magnet Unit Converter
Force (pull)

Magnetic Field

Other offers

This product is an incredibly powerful cylindrical magnet, composed of modern NdFeB material, which, with dimensions of Ø80x30 mm, guarantees the highest energy density. The MW 80x30 / N38 model features high dimensional repeatability and industrial build quality, making it a perfect solution for professional engineers and designers. As a cylindrical magnet with impressive 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 secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is ideal for building electric motors, advanced Hall effect sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the pull force of 1673.99 N with a weight of only 1130.97 g, this rod is indispensable in electronics 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 two-component epoxy glues. To ensure stability 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 industrial 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.
The presented product is a neodymium magnet with precisely defined parameters: diameter 80 mm and height 30 mm. The key parameter here is the holding force amounting to approximately 170.64 kg (force ~1673.99 N), which, with such defined dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which secures it against external factors, 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 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.

Pros as well as cons of rare earth magnets.

Strengths

Besides their exceptional field intensity, neodymium magnets offer the following advantages:
  • They do not lose power, even during nearly 10 years – the reduction in lifting capacity is only ~1% (based on measurements),
  • Neodymium magnets are extremely resistant to loss of magnetic properties caused by magnetic disturbances,
  • The use of an metallic layer of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • They are known for high magnetic induction at the operating surface, which increases their power,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Possibility of exact shaping and adjusting to concrete requirements,
  • Wide application in modern industrial fields – they find application in mass storage devices, electromotive mechanisms, diagnostic systems, as well as modern systems.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Characteristics of disadvantages of neodymium magnets and ways of using them
  • At very strong impacts they can crack, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 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 stable to moisture, when using outdoors
  • Limited ability of creating nuts in the magnet and complicated forms - preferred is casing - mounting mechanism.
  • Health risk related to microscopic parts of magnets are risky, if swallowed, which becomes key in the context of child safety. Furthermore, small elements of these products can be problematic in diagnostics medical when they are in the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities

Holding force characteristics

Breakaway strength of the magnet in ideal conditionswhat it depends on?

The lifting capacity listed is a result of laboratory testing performed under specific, ideal conditions:
  • on a block made of structural steel, effectively closing the magnetic field
  • whose transverse dimension reaches at least 10 mm
  • characterized by smoothness
  • with direct contact (no paint)
  • for force acting at a right angle (in the magnet axis)
  • at standard ambient temperature

What influences lifting capacity in practice

Please note that the application force may be lower subject to the following factors, starting with the most relevant:
  • Gap between surfaces – every millimeter of separation (caused e.g. by veneer or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the nominal value.
  • Base massiveness – too thin sheet does not accept the full field, causing part of the flux to be lost into the air.
  • Steel type – low-carbon steel gives the best results. Higher carbon content decrease magnetic permeability and holding force.
  • Plate texture – ground elements guarantee perfect abutment, which increases force. Uneven metal reduce efficiency.
  • Temperature – temperature increase causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity testing was carried out on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under parallel forces the holding force is lower. Moreover, even a small distance between the magnet’s surface and the plate reduces the load capacity.

Warnings
Hand protection

Protect your hands. Two large magnets will snap together instantly with a force of massive weight, crushing everything in their path. Exercise extreme caution!

Permanent damage

Avoid heat. NdFeB magnets are sensitive to temperature. If you require operation above 80°C, ask us about HT versions (H, SH, UH).

Safe distance

Avoid bringing magnets near a purse, laptop, or screen. The magnetism can permanently damage these devices and wipe information from cards.

Dust is flammable

Mechanical processing of NdFeB material carries a risk of fire risk. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Skin irritation risks

Medical facts indicate that nickel (the usual finish) is a strong allergen. If your skin reacts to metals, refrain from touching magnets with bare hands and choose coated magnets.

Beware of splinters

Watch out for shards. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. Eye protection is mandatory.

Magnetic interference

GPS units and mobile phones are extremely sensitive to magnetism. Direct contact with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

Handling guide

Before starting, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.

Do not give to children

Always store magnets away from children. Choking hazard is high, and the consequences of magnets clamping inside the body are fatal.

Medical interference

People with a ICD must maintain an large gap from magnets. The magnetism can interfere with the functioning of the implant.

Warning! Learn more about hazards in the article: Safety of working with magnets.