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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 parameters 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 analysis of the product - report

These values are the direct effect of a engineering analysis. Results rely on algorithms for the material Nd2Fe14B. Operational conditions might slightly differ. Use these data as a preliminary roadmap when designing systems.

Table 1: Static pull force (pull vs distance) - characteristics
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
medium risk

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 (stability) - 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: Two magnets (attraction) - 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: Protective zones (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: Corrosion resistance
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: 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. Sliding resistance

*Warning: On a vertical wall, the magnet retains merely approx. 20-30% of its max power.

2. Efficiency vs thickness

*Thin metal sheet (e.g. computer case) severely reduces 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) = 0.48

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 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%
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
Measurement Calculator
Magnet pull force

Magnetic Field

Other offers

This product is an incredibly powerful cylinder magnet, made from durable NdFeB material, which, at dimensions of Ø80x30 mm, guarantees the highest energy density. The MW 80x30 / N38 model features an accuracy of ±0.1mm and industrial build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 170.64 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Furthermore, its Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is perfect for building generators, advanced Hall effect sensors, and efficient filters, 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 electronics and wherever every gram matters.
Since our magnets have a tolerance of ±0.1mm, the best method 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 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 a great economic balance and high resistance to demagnetization. If you need the strongest 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.
This model is characterized by dimensions Ø80x30 mm, which, at a weight of 1130.97 g, makes it an element with impressive magnetic energy density. 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 protects the surface against external factors, 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.

Strengths and weaknesses of rare earth magnets.

Strengths

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • They have constant strength, and over around 10 years their performance decreases symbolically – ~1% (according to theory),
  • They are extremely resistant to demagnetization induced by presence of other magnetic fields,
  • By using a lustrous coating of nickel, the element gains an proper look,
  • They are known for high magnetic induction at the operating surface, which affects their effectiveness,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Thanks to freedom in shaping and the ability to customize to specific needs,
  • Huge importance in innovative solutions – they are used in magnetic memories, drive modules, medical devices, as well as modern systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages

Drawbacks and weaknesses of neodymium magnets: application proposals
  • To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously improves its 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
  • They oxidize in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in producing nuts and complex shapes in magnets, we propose using a housing - magnetic mechanism.
  • Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child health protection. Furthermore, small components of these devices are able to complicate diagnosis medical after entering the body.
  • Due to neodymium price, their price is higher than average,

Pull force analysis

Maximum lifting force for a neodymium magnet – what affects it?

The lifting capacity listed is a theoretical maximum value performed under the following configuration:
  • with the contact of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
  • whose transverse dimension reaches at least 10 mm
  • with an ground touching surface
  • under conditions of ideal adhesion (surface-to-surface)
  • during pulling in a direction vertical to the mounting surface
  • at temperature room level

What influences lifting capacity in practice

Real force impacted by working environment parameters, including (from priority):
  • Gap between surfaces – every millimeter of distance (caused e.g. by veneer or dirt) diminishes 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 drastically, often to levels of 20-30% of the nominal value.
  • Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Steel grade – ideal substrate is pure iron steel. Hardened steels may attract less.
  • Base smoothness – the more even the plate, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
  • Temperature – temperature increase results in weakening of induction. Check the thermal limit for a given model.

Lifting capacity testing was performed on a smooth plate of suitable thickness, under a perpendicular pulling force, in contrast under parallel forces the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate decreases the load capacity.

Precautions when working with neodymium magnets
Powerful field

Use magnets consciously. Their immense force can surprise even professionals. Stay alert and do not underestimate their power.

Keep away from children

NdFeB magnets are not toys. Eating a few magnets may result in them connecting inside the digestive tract, which poses a critical condition and necessitates urgent medical intervention.

Life threat

Medical warning: Neodymium magnets can deactivate pacemakers and defibrillators. Stay away if you have medical devices.

Demagnetization risk

Control the heat. Heating the magnet to high heat will ruin its properties and strength.

Protective goggles

Neodymium magnets are sintered ceramics, which means they are prone to chipping. Collision of two magnets leads to them cracking into shards.

Metal Allergy

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

GPS Danger

Remember: rare earth magnets generate a field that disrupts sensitive sensors. Maintain a safe distance from your phone, tablet, and navigation systems.

Do not drill into magnets

Dust produced during grinding of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.

Protect data

Powerful magnetic fields can corrupt files on payment cards, hard drives, and storage devices. Keep a distance of at least 10 cm.

Physical harm

Risk of injury: The attraction force is so great that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.

Caution! Looking for details? Check our post: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98