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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

Physical simulation of the product - report

The following values constitute the direct effect of a physical calculation. Results are based on models for the material Nd2Fe14B. Actual performance may differ. Please consider these calculations as a preliminary roadmap for designers.

Table 1: Static pull force (pull vs gap) - interaction chart
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: Sliding capacity (vertical surface)
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: Vertical assembly (sliding) - 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: Two magnets (repulsion) - field collision
MW 100x30 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding 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: Safety (HSE) (electronics) - warnings
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
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 (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: Anti-corrosion coating durability
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: Electrical data (Pc)
MW 100x30 / N38

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

Table 11: Hydrostatics and buoyancy
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: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Vertical hold

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

2. Plate thickness effect

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

3. Power loss vs temp

*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) = 0.40

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.

Engineering data and GPSR
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%
Sustainability
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
Quick Unit Converter
Magnet pull force

Magnetic Induction

Other products

The presented product is an incredibly powerful cylindrical magnet, made from durable NdFeB material, which, at dimensions of Ø100x30 mm, guarantees the highest energy density. The MW 100x30 / N38 component boasts high dimensional repeatability and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 215.17 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Furthermore, its Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is ideal for building electric motors, advanced Hall effect sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the pull force of 2110.78 N with a weight of only 1767.15 g, this cylindrical magnet is indispensable in electronics and wherever low weight is crucial.
Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 100.1 mm) using two-component epoxy glues. To ensure long-term durability in industry, 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 an optimal price-to-power ratio and operational stability. 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 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 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 through the diameter if your project requires it.

Strengths as well as weaknesses of rare earth magnets.

Strengths

Besides their immense strength, neodymium magnets offer the following advantages:
  • They retain attractive force for almost ten years – the drop is just ~1% (according to analyses),
  • Magnets effectively resist against loss of magnetization caused by external fields,
  • The use of an metallic layer of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • Neodymium magnets generate maximum magnetic induction on a small area, which increases force concentration,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
  • Possibility of precise creating and adjusting to specific applications,
  • Key role in modern industrial fields – they are commonly used in data components, motor assemblies, diagnostic systems, and other advanced devices.
  • Thanks to their power density, small magnets offer high operating force, in miniature format,

Weaknesses

Disadvantages of NdFeB magnets:
  • They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only shields the magnet but also increases its resistance to damage
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we advise 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 water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • We suggest a housing - magnetic mount, due to difficulties in realizing nuts inside the magnet and complex shapes.
  • Health risk to health – tiny shards of magnets are risky, if swallowed, which becomes key in the aspect of protecting the youngest. Furthermore, small components of these products can complicate diagnosis 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 can limit application in large quantities

Holding force characteristics

Optimal lifting capacity of a neodymium magnetwhat it depends on?

The lifting capacity listed is a result of laboratory testing performed under specific, ideal conditions:
  • on a base made of structural steel, perfectly concentrating the magnetic field
  • whose thickness reaches at least 10 mm
  • with a surface free of scratches
  • under conditions of gap-free contact (surface-to-surface)
  • for force acting at a right angle (in the magnet axis)
  • at ambient temperature room level

Key elements affecting lifting force

Please note that the application force may be lower depending on the following factors, in order of importance:
  • Space between surfaces – every millimeter of distance (caused e.g. by veneer or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
  • Loading method – catalog parameter refers to detachment vertically. When slipping, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
  • Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Material type – the best choice is high-permeability steel. Stainless steels may have worse magnetic properties.
  • Plate texture – smooth surfaces guarantee perfect abutment, which improves field saturation. Rough surfaces reduce efficiency.
  • Thermal environment – temperature increase results in weakening of force. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, whereas under shearing force the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet and the plate lowers the load capacity.

Safe handling of NdFeB magnets
Metal Allergy

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If skin irritation appears, cease working with magnets and use protective gear.

Keep away from children

These products are not toys. Eating multiple magnets can lead to them pinching intestinal walls, which poses a direct threat to life and necessitates immediate surgery.

Do not drill into magnets

Mechanical processing of NdFeB material poses a fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Implant safety

Warning for patients: Powerful magnets affect electronics. Keep minimum 30 cm distance or request help to handle the magnets.

Fragile material

Protect your eyes. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. Eye protection is mandatory.

Safe operation

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

Do not overheat magnets

Standard neodymium magnets (N-type) lose magnetization when the temperature exceeds 80°C. Damage is permanent.

Cards and drives

Avoid bringing magnets near a purse, computer, or screen. The magnetic field can destroy these devices and erase data from cards.

Pinching danger

Protect your hands. Two powerful magnets will join instantly with a force of massive weight, crushing anything in their path. Be careful!

GPS Danger

A strong magnetic field interferes with the operation of compasses in smartphones and navigation systems. Keep magnets near a device to prevent damaging the sensors.

Safety First! Details about risks in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98