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MW 100x30 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010002

GTIN/EAN: 5906301810025

5.00

Diameter Ø

100 mm [±0,1 mm]

Height

30 mm [±0,1 mm]

Weight

1767.15 g

Magnetization Direction

↑ axial

Load capacity

215.17 kg / 2110.78 N

Magnetic Induction

318.96 mT / 3190 Gs

Coating

[NiCuNi] Nickel

650.01 with VAT / pcs + price for transport

528.46 ZŁ net + 23% VAT / pcs

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Technical parameters - MW 100x30 / N38 - cylindrical magnet

Specification / characteristics - MW 100x30 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010002
GTIN/EAN 5906301810025
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 100 mm [±0,1 mm]
Height 30 mm [±0,1 mm]
Weight 1767.15 g
Magnetization Direction ↑ axial
Load capacity ~ ? 215.17 kg / 2110.78 N
Magnetic Induction ~ ? 318.96 mT / 3190 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 100x30 / 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 - data

Presented values constitute the outcome of a engineering analysis. Values are based on algorithms for the class Nd2Fe14B. Actual performance might slightly differ from theoretical values. Use these data as a reference point when designing systems.

Table 1: Static pull force (pull vs distance) - power drop
MW 100x30 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3189 Gs
318.9 mT
215.17 kg / 474.37 LBS
215170.0 g / 2110.8 N
crushing
1 mm 3143 Gs
314.3 mT
208.96 kg / 460.68 LBS
208959.6 g / 2049.9 N
crushing
2 mm 3094 Gs
309.4 mT
202.53 kg / 446.51 LBS
202531.7 g / 1986.8 N
crushing
3 mm 3044 Gs
304.4 mT
195.98 kg / 432.07 LBS
195982.5 g / 1922.6 N
crushing
5 mm 2939 Gs
293.9 mT
182.65 kg / 402.68 LBS
182651.7 g / 1791.8 N
crushing
10 mm 2657 Gs
265.7 mT
149.35 kg / 329.26 LBS
149349.8 g / 1465.1 N
crushing
15 mm 2366 Gs
236.6 mT
118.41 kg / 261.05 LBS
118412.6 g / 1161.6 N
crushing
20 mm 2081 Gs
208.1 mT
91.64 kg / 202.03 LBS
91640.5 g / 899.0 N
crushing
30 mm 1573 Gs
157.3 mT
52.34 kg / 115.40 LBS
52344.5 g / 513.5 N
crushing
50 mm 874 Gs
87.4 mT
16.14 kg / 35.58 LBS
16140.3 g / 158.3 N
crushing

Table 2: Shear capacity (wall)
MW 100x30 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 43.03 kg / 94.87 LBS
43034.0 g / 422.2 N
1 mm Stal (~0.2) 41.79 kg / 92.14 LBS
41792.0 g / 410.0 N
2 mm Stal (~0.2) 40.51 kg / 89.30 LBS
40506.0 g / 397.4 N
3 mm Stal (~0.2) 39.20 kg / 86.41 LBS
39196.0 g / 384.5 N
5 mm Stal (~0.2) 36.53 kg / 80.53 LBS
36530.0 g / 358.4 N
10 mm Stal (~0.2) 29.87 kg / 65.85 LBS
29870.0 g / 293.0 N
15 mm Stal (~0.2) 23.68 kg / 52.21 LBS
23682.0 g / 232.3 N
20 mm Stal (~0.2) 18.33 kg / 40.41 LBS
18328.0 g / 179.8 N
30 mm Stal (~0.2) 10.47 kg / 23.08 LBS
10468.0 g / 102.7 N
50 mm Stal (~0.2) 3.23 kg / 7.12 LBS
3228.0 g / 31.7 N

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 100x30 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
64.55 kg / 142.31 LBS
64551.0 g / 633.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
43.03 kg / 94.87 LBS
43034.0 g / 422.2 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
21.52 kg / 47.44 LBS
21517.0 g / 211.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
107.59 kg / 237.18 LBS
107585.0 g / 1055.4 N

Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 100x30 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
3%
7.17 kg / 15.81 LBS
7172.3 g / 70.4 N
1 mm
8%
17.93 kg / 39.53 LBS
17930.8 g / 175.9 N
2 mm
17%
35.86 kg / 79.06 LBS
35861.7 g / 351.8 N
3 mm
25%
53.79 kg / 118.59 LBS
53792.5 g / 527.7 N
5 mm
42%
89.65 kg / 197.65 LBS
89654.2 g / 879.5 N
10 mm
83%
179.31 kg / 395.31 LBS
179308.3 g / 1759.0 N
11 mm
92%
197.24 kg / 434.84 LBS
197239.2 g / 1934.9 N
12 mm
100%
215.17 kg / 474.37 LBS
215170.0 g / 2110.8 N

Table 5: Thermal resistance (material behavior) - power drop
MW 100x30 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 215.17 kg / 474.37 LBS
215170.0 g / 2110.8 N
OK
40 °C -2.2% 210.44 kg / 463.93 LBS
210436.3 g / 2064.4 N
OK
60 °C -4.4% 205.70 kg / 453.50 LBS
205702.5 g / 2017.9 N
80 °C -6.6% 200.97 kg / 443.06 LBS
200968.8 g / 1971.5 N
100 °C -28.8% 153.20 kg / 337.75 LBS
153201.0 g / 1502.9 N

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 100x30 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 492.55 kg / 1085.88 LBS
4 762 Gs
73.88 kg / 162.88 LBS
73882 g / 724.8 N
N/A
1 mm 485.56 kg / 1070.47 LBS
6 333 Gs
72.83 kg / 160.57 LBS
72834 g / 714.5 N
437.00 kg / 963.42 LBS
~0 Gs
2 mm 478.33 kg / 1054.54 LBS
6 286 Gs
71.75 kg / 158.18 LBS
71749 g / 703.9 N
430.50 kg / 949.08 LBS
~0 Gs
3 mm 471.01 kg / 1038.40 LBS
6 238 Gs
70.65 kg / 155.76 LBS
70652 g / 693.1 N
423.91 kg / 934.56 LBS
~0 Gs
5 mm 456.15 kg / 1005.64 LBS
6 139 Gs
68.42 kg / 150.85 LBS
68422 g / 671.2 N
410.53 kg / 905.07 LBS
~0 Gs
10 mm 418.11 kg / 921.77 LBS
5 877 Gs
62.72 kg / 138.27 LBS
62716 g / 615.2 N
376.30 kg / 829.59 LBS
~0 Gs
20 mm 341.88 kg / 753.71 LBS
5 314 Gs
51.28 kg / 113.06 LBS
51282 g / 503.1 N
307.69 kg / 678.34 LBS
~0 Gs
50 mm 159.49 kg / 351.61 LBS
3 630 Gs
23.92 kg / 52.74 LBS
23923 g / 234.7 N
143.54 kg / 316.45 LBS
~0 Gs
60 mm 119.82 kg / 264.16 LBS
3 146 Gs
17.97 kg / 39.62 LBS
17973 g / 176.3 N
107.84 kg / 237.75 LBS
~0 Gs
70 mm 89.40 kg / 197.09 LBS
2 718 Gs
13.41 kg / 29.56 LBS
13410 g / 131.6 N
80.46 kg / 177.38 LBS
~0 Gs
80 mm 66.51 kg / 146.64 LBS
2 344 Gs
9.98 kg / 22.00 LBS
9977 g / 97.9 N
59.86 kg / 131.97 LBS
~0 Gs
90 mm 49.50 kg / 109.14 LBS
2 022 Gs
7.43 kg / 16.37 LBS
7426 g / 72.8 N
44.55 kg / 98.22 LBS
~0 Gs
100 mm 36.95 kg / 81.45 LBS
1 747 Gs
5.54 kg / 12.22 LBS
5542 g / 54.4 N
33.25 kg / 73.31 LBS
~0 Gs

Table 7: Hazards (electronics) - precautionary measures
MW 100x30 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 44.0 cm
Hearing aid 10 Gs (1.0 mT) 34.5 cm
Mechanical watch 20 Gs (2.0 mT) 27.0 cm
Mobile device 40 Gs (4.0 mT) 21.0 cm
Remote 50 Gs (5.0 mT) 19.0 cm
Payment card 400 Gs (40.0 mT) 8.0 cm
HDD hard drive 600 Gs (60.0 mT) 6.5 cm

Table 8: Collisions (kinetic energy) - warning
MW 100x30 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 15.21 km/h
(4.22 m/s)
15.77 J
30 mm 22.01 km/h
(6.11 m/s)
33.03 J
50 mm 26.02 km/h
(7.23 m/s)
46.17 J
100 mm 35.32 km/h
(9.81 m/s)
85.04 J

Table 9: Corrosion resistance
MW 100x30 / 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 100x30 / N38

Parameter Value SI Unit / Description
Magnetic Flux 269 425 Mx 2694.3 µWb
Pc Coefficient 0.40 Low (Flat)

Table 11: Submerged application
MW 100x30 / N38

Environment Effective steel pull Effect
Air (land) 215.17 kg Standard
Water (riverbed) 246.37 kg
(+31.20 kg buoyancy gain)
+14.5%
Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Vertical hold

*Caution: On a vertical surface, the magnet retains just approx. 20-30% of its max power.

2. Efficiency vs thickness

*Thin steel (e.g. 0.5mm PC case) significantly 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) = 0.40

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.

Engineering data and GPSR
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%
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: 010002-2026
Magnet Unit Converter
Pulling force

Magnetic Field

Other deals

The offered product is an exceptionally strong cylindrical magnet, made from durable NdFeB material, which, at dimensions of Ø100x30 mm, guarantees optimal power. The MW 100x30 / N38 model boasts a tolerance of ±0.1mm and industrial build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with significant force (approx. 215.17 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Additionally, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
It successfully proves itself in modeling, advanced automation, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 2110.78 N with a weight of only 1767.15 g, this rod is indispensable in electronics and wherever every gram matters.
Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. To ensure long-term durability 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 professional neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø100x30), 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 Ø100x30 mm, which, at a weight of 1767.15 g, makes it an element with high magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 215.17 kg (force ~2110.78 N), which, with such defined dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface 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 100 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.

Strengths and weaknesses of Nd2Fe14B magnets.

Pros

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They have constant strength, and over nearly 10 years their attraction force decreases symbolically – ~1% (in testing),
  • Neodymium magnets are characterized by highly resistant to loss of magnetic properties caused by external field sources,
  • A magnet with a smooth silver surface is more attractive,
  • The surface of neodymium magnets generates a strong magnetic field – this is a key feature,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to the option of precise forming and customization to custom needs, neodymium magnets can be modeled in a wide range of forms and dimensions, which expands the range of possible applications,
  • Significant place in modern technologies – they are used in data components, electromotive mechanisms, medical equipment, also modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which enables their usage in compact constructions

Disadvantages

Disadvantages of neodymium magnets:
  • At strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation as well as corrosion.
  • We suggest casing - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complicated shapes.
  • Possible danger related to microscopic parts of magnets pose a threat, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, small components of these magnets are able to be problematic in diagnostics medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Magnetic strength at its maximum – what it depends on?

The lifting capacity listed is a theoretical maximum value performed under the following configuration:
  • on a block made of structural steel, effectively closing the magnetic field
  • with a cross-section minimum 10 mm
  • with a plane cleaned and smooth
  • with direct contact (no paint)
  • during detachment in a direction perpendicular to the mounting surface
  • in stable room temperature

What influences lifting capacity in practice

In practice, the actual lifting capacity results from a number of factors, presented from the most important:
  • Space between magnet and steel – every millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Loading method – declared lifting capacity refers to detachment vertically. When slipping, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
  • Steel thickness – insufficiently thick plate does not accept the full field, causing part of the flux to be wasted to the other side.
  • Chemical composition of the base – low-carbon steel attracts best. Higher carbon content lower magnetic properties and holding force.
  • Surface condition – ground elements ensure maximum contact, which improves field saturation. Rough surfaces weaken the grip.
  • Thermal factor – high temperature weakens magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity was measured using a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, whereas under attempts to slide the magnet the holding force is lower. In addition, even a small distance between the magnet and the plate lowers the load capacity.

Warnings
Implant safety

For implant holders: Strong magnetic fields disrupt electronics. Maintain at least 30 cm distance or ask another person to work with the magnets.

Metal Allergy

A percentage of the population suffer from a contact allergy to Ni, which is the common plating for NdFeB magnets. Frequent touching might lead to an allergic reaction. We recommend use safety gloves.

Handling guide

Be careful. Rare earth magnets attract from a long distance and snap with huge force, often faster than you can move away.

Shattering risk

Watch out for shards. Magnets can fracture upon violent connection, ejecting shards into the air. Eye protection is mandatory.

Flammability

Mechanical processing of neodymium magnets carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Adults only

Absolutely store magnets away from children. Choking hazard is significant, and the effects of magnets clamping inside the body are very dangerous.

Data carriers

Powerful magnetic fields can erase data on payment cards, hard drives, and storage devices. Keep a distance of min. 10 cm.

Maximum temperature

Standard neodymium magnets (grade N) lose power when the temperature exceeds 80°C. This process is irreversible.

Compass and GPS

An intense magnetic field negatively affects the functioning of compasses in smartphones and navigation systems. Do not bring magnets near a smartphone to avoid damaging the sensors.

Crushing risk

Danger of trauma: The attraction force is so great that it can result in hematomas, crushing, and even bone fractures. Use thick gloves.

Caution! Looking for details? Read our article: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98