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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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Product card - 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

Technical modeling of the assembly - data

These data constitute the result of a mathematical calculation. Values were calculated on algorithms for the class Nd2Fe14B. Actual performance may differ from theoretical values. Please consider these data as a supplementary guide for designers.

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
dangerous!
1 mm 3143 Gs
314.3 mT
208.96 kg / 460.68 LBS
208959.6 g / 2049.9 N
dangerous!
2 mm 3094 Gs
309.4 mT
202.53 kg / 446.51 LBS
202531.7 g / 1986.8 N
dangerous!
3 mm 3044 Gs
304.4 mT
195.98 kg / 432.07 LBS
195982.5 g / 1922.6 N
dangerous!
5 mm 2939 Gs
293.9 mT
182.65 kg / 402.68 LBS
182651.7 g / 1791.8 N
dangerous!
10 mm 2657 Gs
265.7 mT
149.35 kg / 329.26 LBS
149349.8 g / 1465.1 N
dangerous!
15 mm 2366 Gs
236.6 mT
118.41 kg / 261.05 LBS
118412.6 g / 1161.6 N
dangerous!
20 mm 2081 Gs
208.1 mT
91.64 kg / 202.03 LBS
91640.5 g / 899.0 N
dangerous!
30 mm 1573 Gs
157.3 mT
52.34 kg / 115.40 LBS
52344.5 g / 513.5 N
dangerous!
50 mm 874 Gs
87.4 mT
16.14 kg / 35.58 LBS
16140.3 g / 158.3 N
dangerous!

Table 2: Shear load (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) - vertical pull
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 (saturation) - 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 stability (stability) - 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 (attraction) - forces in the system
MW 100x30 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (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: Safety (HSE) (implants) - 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
Timepiece 20 Gs (2.0 mT) 27.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 21.0 cm
Car key 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 (cracking risk) - collision effects
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%
Rust risk: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Sliding resistance

*Warning: On a vertical surface, the magnet holds only a fraction of its max power.

2. Efficiency vs thickness

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

3. Heat tolerance

*For standard magnets, 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

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: 010002-2026
Magnet Unit Converter
Force (pull)

Magnetic Field

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The offered product is an extremely powerful cylinder magnet, produced from durable NdFeB material, which, at dimensions of Ø100x30 mm, guarantees optimal power. This specific item boasts high dimensional repeatability and professional build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 215.17 kg), this product is in stock from our European logistics center, ensuring quick order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
This model is ideal for building generators, advanced Hall effect sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the pull force of 2110.78 N with a weight of only 1767.15 g, this rod is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 100.1 mm) using epoxy glues. To ensure long-term durability in automation, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most popular standard for professional neodymium magnets, offering an optimal price-to-power ratio and operational stability. If you need even stronger magnets in the same volume (Ø100x30), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.
This model is characterized by dimensions Ø100x30 mm, which, at a weight of 1767.15 g, makes it an element with impressive magnetic energy density. The value of 2110.78 N means that the magnet is capable of holding a weight many times exceeding its own mass of 1767.15 g. The product has a [NiCuNi] coating, which secures it against external factors, 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. Such an arrangement is standard 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 through the diameter if your project requires it.

Strengths as well as weaknesses of neodymium magnets.

Advantages

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They virtually do not lose power, because even after 10 years the performance loss is only ~1% (in laboratory conditions),
  • They retain their magnetic properties even under strong external field,
  • The use of an aesthetic layer of noble metals (nickel, gold, silver) causes the element to look better,
  • Magnets are characterized by exceptionally strong magnetic induction on the outer side,
  • Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to flexibility in constructing and the ability to adapt to unusual requirements,
  • Key role in electronics industry – they serve a role in magnetic memories, electromotive mechanisms, advanced medical instruments, as well as multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which makes them useful in compact constructions

Weaknesses

Drawbacks and weaknesses of neodymium magnets: tips and applications.
  • They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
  • When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their strength 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
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • We suggest cover - magnetic holder, due to difficulties in creating threads inside the magnet and complex forms.
  • Health risk to health – tiny shards of magnets pose a threat, if swallowed, which becomes key in the context of child health protection. It is also worth noting that small elements of these products are able to disrupt the diagnostic process medical after entering the body.
  • With mass production the cost of neodymium magnets is a challenge,

Lifting parameters

Optimal lifting capacity of a neodymium magnetwhat affects it?

The declared magnet strength concerns the peak performance, obtained under optimal environment, meaning:
  • with the contact of a yoke made of low-carbon steel, ensuring maximum field concentration
  • with a thickness no less than 10 mm
  • with a surface cleaned and smooth
  • with direct contact (no coatings)
  • for force applied at a right angle (in the magnet axis)
  • at room temperature

Practical aspects of lifting capacity – factors

During everyday use, the actual lifting capacity is determined by a number of factors, ranked from most significant:
  • Gap (between the magnet and the plate), since even a microscopic clearance (e.g. 0.5 mm) results in a reduction in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
  • Loading method – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
  • Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
  • Plate material – mild steel gives the best results. Alloy admixtures decrease magnetic permeability and holding force.
  • Surface condition – ground elements guarantee perfect abutment, which increases force. Uneven metal weaken the grip.
  • Thermal factor – high temperature reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, however under shearing force the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet’s surface and the plate reduces the lifting capacity.

Safety rules for work with neodymium magnets
Handling rules

Before use, read the rules. Sudden snapping can break the magnet or injure your hand. Be predictive.

Health Danger

People with a ICD should keep an safe separation from magnets. The magnetism can disrupt the functioning of the implant.

Cards and drives

Equipment safety: Strong magnets can ruin payment cards and sensitive devices (pacemakers, hearing aids, mechanical watches).

Warning for allergy sufferers

Nickel alert: The nickel-copper-nickel coating consists of nickel. If an allergic reaction occurs, cease working with magnets and use protective gear.

Magnets are brittle

Watch out for shards. Magnets can explode upon violent connection, launching sharp fragments into the air. Eye protection is mandatory.

Mechanical processing

Combustion risk: Neodymium dust is explosive. Avoid machining magnets without safety gear as this risks ignition.

Demagnetization risk

Avoid heat. NdFeB magnets are susceptible to temperature. If you require operation above 80°C, inquire about special high-temperature series (H, SH, UH).

Impact on smartphones

Remember: neodymium magnets produce a field that disrupts precision electronics. Keep a safe distance from your mobile, tablet, and navigation systems.

Pinching danger

Mind your fingers. Two powerful magnets will snap together immediately with a force of massive weight, destroying everything in their path. Be careful!

Product not for children

Always store magnets away from children. Choking hazard is high, and the consequences of magnets connecting inside the body are life-threatening.

Security! Looking for details? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98