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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
337.40 ZŁ
415.00 ZŁ
price from 5 pcs
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390.10 ZŁ
price from 10 pcs
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365.20 ZŁ
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Lifting power along with shape of neodymium magnets can be reviewed using our force calculator.

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Technical 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

Physical modeling of the product - report

These data constitute the outcome of a mathematical calculation. Values rely on algorithms for the class Nd2Fe14B. Actual performance might slightly deviate from the simulation results. Please consider these data as a supplementary guide during assembly planning.

Table 1: Static pull 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 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
medium risk

Table 2: Shear 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 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: Vertical assembly (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 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 (substrate influence) - 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 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: Thermal resistance (stability) - resistance threshold
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: Magnet-Magnet interaction (repulsion) - field collision
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 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: Protective zones (electronics) - 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: Collisions (kinetic energy) - 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 (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: Hydrostatics and buoyancy
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: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Shear force

*Warning: On a vertical wall, the magnet retains just a fraction of its nominal pull.

2. Plate thickness effect

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

3. Temperature resistance

*For standard magnets, 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 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
Quick Unit Converter
Force (pull)

Field Strength

Other products

The offered product is an incredibly powerful cylinder magnet, composed of advanced NdFeB material, which, at dimensions of Ø80x30 mm, guarantees optimal power. This specific item features high dimensional repeatability and industrial build quality, making it an ideal 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 rapid order fulfillment. Furthermore, its triple-layer 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 DIY projects, advanced robotics, and broadly understood industry, serving as a positioning or actuating element. 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 low weight is crucial.
Due to the delicate structure of the ceramic sinter, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure stability in industry, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability 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 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 key parameter here is the lifting capacity 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 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 through the diameter if your project requires it.

Pros as well as cons of Nd2Fe14B magnets.

Advantages

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • They have constant strength, and over more than 10 years their attraction force decreases symbolically – ~1% (according to theory),
  • Neodymium magnets are highly resistant to loss of magnetic properties caused by magnetic disturbances,
  • Thanks to the shimmering finish, the coating of nickel, gold-plated, or silver gives an clean appearance,
  • Magnetic induction on the surface of the magnet is maximum,
  • Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to modularity in shaping and the ability to customize to unusual requirements,
  • Key role in advanced technology sectors – they are used in hard drives, electric motors, medical equipment, as well as other advanced devices.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages

Disadvantages of NdFeB magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a strong case, which not only secures them against impacts but also increases their durability
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in producing nuts and complicated shapes in magnets, we propose using cover - magnetic mechanism.
  • Health risk related to microscopic parts of magnets are risky, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these devices can complicate diagnosis medical when they are in the body.
  • Due to expensive raw materials, their price is higher than average,

Lifting parameters

Detachment force of the magnet in optimal conditionswhat contributes to it?

The load parameter shown refers to the peak performance, measured under laboratory conditions, specifically:
  • with the use of a sheet made of special test steel, ensuring full magnetic saturation
  • possessing a massiveness of at least 10 mm to avoid saturation
  • with an polished contact surface
  • under conditions of gap-free contact (surface-to-surface)
  • for force applied at a right angle (in the magnet axis)
  • in neutral thermal conditions

Determinants of lifting force in real conditions

In real-world applications, the actual holding force results from many variables, ranked from the most important:
  • Clearance – existence of foreign body (paint, dirt, air) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Force direction – note that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the nominal value.
  • Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of converting into lifting capacity.
  • Steel grade – the best choice is pure iron steel. Cast iron may have worse magnetic properties.
  • Surface structure – the smoother and more polished the surface, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
  • Thermal factor – hot environment weakens pulling force. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas under shearing force the lifting capacity is smaller. In addition, even a small distance between the magnet’s surface and the plate decreases the holding force.

Safe handling of neodymium magnets
Do not give to children

Absolutely keep magnets out of reach of children. Choking hazard is significant, and the effects of magnets connecting inside the body are very dangerous.

Serious injuries

Protect your hands. Two powerful magnets will snap together immediately with a force of several hundred kilograms, crushing anything in their path. Be careful!

Life threat

Patients with a ICD must maintain an safe separation from magnets. The magnetism can interfere with the operation of the implant.

Warning for allergy sufferers

Nickel alert: The Ni-Cu-Ni coating contains nickel. If an allergic reaction happens, cease handling magnets and use protective gear.

Permanent damage

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

Combustion hazard

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

Impact on smartphones

Remember: neodymium magnets generate a field that disrupts sensitive sensors. Keep a separation from your phone, tablet, and navigation systems.

Protect data

Very strong magnetic fields can erase data on credit cards, hard drives, and other magnetic media. Stay away of at least 10 cm.

Eye protection

Protect your eyes. Magnets can fracture upon uncontrolled impact, launching shards into the air. Wear goggles.

Handling rules

Before use, check safety instructions. Sudden snapping can destroy the magnet or hurt your hand. Be predictive.

Danger! Need more info? Read our article: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98