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MW 100x10 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010001

GTIN/EAN: 5906301810018

5.00

Diameter Ø

100 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

589.05 g

Magnetization Direction

↑ axial

Load capacity

40.86 kg / 400.80 N

Magnetic Induction

121.59 mT / 1216 Gs

Coating

[NiCuNi] Nickel

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368.50 ZŁ with VAT / pcs + price for transport

299.59 ZŁ net + 23% VAT / pcs

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Product card - MW 100x10 / N38 - cylindrical magnet

Specification / characteristics - MW 100x10 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010001
GTIN/EAN 5906301810018
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 10 mm [±0,1 mm]
Weight 589.05 g
Magnetization Direction ↑ axial
Load capacity ~ ? 40.86 kg / 400.80 N
Magnetic Induction ~ ? 121.59 mT / 1216 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 100x10 / 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 analysis of the assembly - technical parameters

Presented data are the outcome of a engineering simulation. Values were calculated on models for the class Nd2Fe14B. Operational conditions might slightly differ. Please consider these data as a reference point when designing systems.

Table 1: Static force (force vs gap) - characteristics
MW 100x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1216 Gs
121.6 mT
 40.86 kg / 90.08 lbs
40860.0 g / 400.8 N
 crushing
1 mm 1208 Gs
120.8 mT
 40.35 kg / 88.95 lbs
40345.4 g / 395.8 N
 crushing
2 mm 1199 Gs
119.9 mT
 39.74 kg / 87.62 lbs
39742.7 g / 389.9 N
 crushing
3 mm 1189 Gs
118.9 mT
 39.06 kg / 86.12 lbs
39062.0 g / 383.2 N
 crushing
5 mm 1165 Gs
116.5 mT
 37.49 kg / 82.65 lbs
37490.2 g / 367.8 N
 crushing
10 mm 1087 Gs
108.7 mT
 32.64 kg / 71.96 lbs
32640.7 g / 320.2 N
 crushing
15 mm 991 Gs
99.1 mT
 27.15 kg / 59.86 lbs
27153.9 g / 266.4 N
 crushing
20 mm 887 Gs
88.7 mT
 21.76 kg / 47.97 lbs
21758.7 g / 213.5 N
 crushing
30 mm 683 Gs
68.3 mT
 12.90 kg / 28.45 lbs
12902.7 g / 126.6 N
 crushing
50 mm 379 Gs
37.9 mT
 3.97 kg / 8.75 lbs
3968.4 g / 38.9 N
 medium risk
Pulling power weakens sharply with every subsequent millimeter of gap. Remember that even the smallest gap (e.g., contamination, paint, dust) significantly weakens the grip. Neodymiums hold most effectively during direct contact; air break kills the force. Notice how rapidly the parameters fall, when the product does not touch tightly to the steel surface. When designing the mounting, eliminate redundant distances.

Table 2: Slippage capacity (wall)
MW 100x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 8.17 kg / 18.02 lbs
8172.0 g / 80.2 N
1 mm Stal (~0.2) 8.07 kg / 17.79 lbs
8070.0 g / 79.2 N
2 mm Stal (~0.2) 7.95 kg / 17.52 lbs
7948.0 g / 78.0 N
3 mm Stal (~0.2) 7.81 kg / 17.22 lbs
7812.0 g / 76.6 N
5 mm Stal (~0.2) 7.50 kg / 16.53 lbs
7498.0 g / 73.6 N
10 mm Stal (~0.2) 6.53 kg / 14.39 lbs
6528.0 g / 64.0 N
15 mm Stal (~0.2) 5.43 kg / 11.97 lbs
5430.0 g / 53.3 N
20 mm Stal (~0.2) 4.35 kg / 9.59 lbs
4352.0 g / 42.7 N
30 mm Stal (~0.2) 2.58 kg / 5.69 lbs
2580.0 g / 25.3 N
50 mm Stal (~0.2) 0.79 kg / 1.75 lbs
794.0 g / 7.8 N
This section indicates the estimated shear load necessary to initiate the shifting of the magnet down against a vertical steel wall (considering typical friction coefficient). This value depends on the gap size between the magnet and the metal.

Table 3: Vertical assembly (sliding) - vertical pull
MW 100x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
12.26 kg / 27.02 lbs
12258.0 g / 120.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
8.17 kg / 18.02 lbs
8172.0 g / 80.2 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
4.09 kg / 9.01 lbs
4086.0 g / 40.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
20.43 kg / 45.04 lbs
20430.0 g / 200.4 N
When placing a magnet on a upright surface (e.g., a car body), it you can count on just approx. 1/5 of nominal attraction strength. Gravity and a weak degree of grip mean that holders slide down easier than they detach. Designing a wall mount? Consider that the shear force is noticeably lower than the maximum static pull force. On a painted metal, the holder will give way down under a much lighter load. Using a rubber coating can effectively increase the grip.

Table 4: Steel thickness (saturation) - sheet metal selection
MW 100x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
 2.04 kg / 4.50 lbs
2043.0 g / 20.0 N
1 mm
13%
 5.11 kg / 11.26 lbs
5107.5 g / 50.1 N
2 mm
25%
 10.22 kg / 22.52 lbs
10215.0 g / 100.2 N
3 mm
38%
 15.32 kg / 33.78 lbs
15322.5 g / 150.3 N
5 mm
63%
 25.54 kg / 56.30 lbs
25537.5 g / 250.5 N
10 mm
100%
 40.86 kg / 90.08 lbs
40860.0 g / 400.8 N
11 mm
100%
 40.86 kg / 90.08 lbs
40860.0 g / 400.8 N
12 mm
100%
 40.86 kg / 90.08 lbs
40860.0 g / 400.8 N
A thin sheet is incapable of conduct the full magnetic flux, which wastes potential of the holder. If you mount a strong magnet to a thin surface, the field will penetrate right through and the holding will be smaller. To squeeze the maximum of this neodymium's power, you require a sufficiently solid piece of steel. The saturation effect causes that on delicate walls (e.g., car bodies), the magnet shows lower pull force. We suggest choosing the steel cross-section from these parameters.

Table 5: Thermal stability (stability) - power drop
MW 100x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 40.86 kg / 90.08 lbs
40860.0 g / 400.8 N
 OK
40 °C -2.2% 39.96 kg / 88.10 lbs
39961.1 g / 392.0 N
 OK
60 °C -4.4% 39.06 kg / 86.12 lbs
39062.2 g / 383.2 N
80 °C -6.6% 38.16 kg / 84.14 lbs
38163.2 g / 374.4 N
100 °C -28.8% 29.09 kg / 64.14 lbs
29092.3 g / 285.4 N
Ordinary NdFeB products irreversibly lose parameters above the temperature limit. Avoid high temperatures – excessive heat can permanently damage this magnet. With every degree above norm, the neodymium's force briefly decreases. Do not use this product close to ovens exceeding its working range. Exceeding the critical threshold will cause permanent loss of magnetic properties.
*Engineering note: Heat tolerance is determined by both grade, and the Permeance Coefficient Pc. Low-profile magnets (pancake types) may lose charge permanently at lower temperatures than long magnets. The danger warning in the table signals a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 100x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 71.58 kg / 157.80 lbs
2 302 Gs
10.74 kg / 23.67 lbs
10737 g / 105.3 N
 N/A
1 mm 71.15 kg / 156.86 lbs
2 424 Gs
10.67 kg / 23.53 lbs
10673 g / 104.7 N
 64.04 kg / 141.17 lbs
~0 Gs
2 mm 70.68 kg / 155.82 lbs
2 416 Gs
10.60 kg / 23.37 lbs
10602 g / 104.0 N
 63.61 kg / 140.23 lbs
~0 Gs
3 mm 70.17 kg / 154.69 lbs
2 408 Gs
10.53 kg / 23.20 lbs
10525 g / 103.3 N
 63.15 kg / 139.22 lbs
~0 Gs
5 mm 69.04 kg / 152.21 lbs
2 388 Gs
10.36 kg / 22.83 lbs
10356 g / 101.6 N
 62.14 kg / 136.99 lbs
~0 Gs
10 mm 65.68 kg / 144.79 lbs
2 329 Gs
9.85 kg / 21.72 lbs
9851 g / 96.6 N
 59.11 kg / 130.31 lbs
~0 Gs
20 mm 57.18 kg / 126.06 lbs
2 173 Gs
8.58 kg / 18.91 lbs
8577 g / 84.1 N
 51.46 kg / 113.45 lbs
~0 Gs
50 mm 29.67 kg / 65.40 lbs
1 565 Gs
4.45 kg / 9.81 lbs
4450 g / 43.7 N
 26.70 kg / 58.86 lbs
~0 Gs
60 mm 22.60 kg / 49.83 lbs
1 366 Gs
3.39 kg / 7.47 lbs
3390 g / 33.3 N
 20.34 kg / 44.85 lbs
~0 Gs
70 mm 16.98 kg / 37.43 lbs
1 184 Gs
2.55 kg / 5.61 lbs
2546 g / 25.0 N
 15.28 kg / 33.68 lbs
~0 Gs
80 mm 12.64 kg / 27.87 lbs
1 022 Gs
1.90 kg / 4.18 lbs
1896 g / 18.6 N
 11.38 kg / 25.08 lbs
~0 Gs
90 mm 9.38 kg / 20.67 lbs
880 Gs
1.41 kg / 3.10 lbs
1406 g / 13.8 N
 8.44 kg / 18.60 lbs
~0 Gs
100 mm 6.95 kg / 15.33 lbs
758 Gs
1.04 kg / 2.30 lbs
1043 g / 10.2 N
 6.26 kg / 13.79 lbs
~0 Gs
Two magnetic products interact from a much further distance than a neodymium and metal combination. The connection of two magnets creates a more powerful interaction and a further horizon of action. Want to build a solid fastener? Utilize two neodymiums instead of one magnet and a steel. Be careful that when bringing together two magnets, the impact force is massive. The levitation is marginally weaker than the attraction, but still large.
*The magnetic induction in repulsion mode is approximately ~0 Gs at the midpoint between the magnets (due to field cancellation).
Important: Figures refer to shear force of a pair of identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Protective zones (electronics) - precautionary measures
MW 100x10 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 31.0 cm
Hearing aid 10 Gs (1.0 mT) 24.0 cm
Timepiece 20 Gs (2.0 mT) 19.0 cm
Mobile device 40 Gs (4.0 mT) 14.5 cm
Remote 50 Gs (5.0 mT) 13.5 cm
Payment card 400 Gs (40.0 mT) 5.0 cm
HDD hard drive 600 Gs (60.0 mT) 3.5 cm
A strong magnetic field is a serious hazard to electronics and medical implants. These neodymiums produce a flux that disrupts operation of sensitive medical devices. Remember: the unseen radiation penetrates the body and glass. Special caution must be taken by people with cochlear implants and insulin pumps. Also at risk are: automatic timepieces, remotes, speakers, and displays. Do not place the magnet near cards, HDD media, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - collision effects
MW 100x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 11.87 km/h
(3.30 m/s)
 3.20 J
30 mm 17.18 km/h
(4.77 m/s)
 6.71 J
50 mm 19.89 km/h
(5.52 m/s)
 8.99 J
100 mm 26.67 km/h
(7.41 m/s)
 16.17 J
Magnetic elements are prone to chipping – a violent impact against metal can result in shattering. Pay attention to connection velocity – a magnet released freely turns into a projectile. Kinetic force can trigger coating fragments or injury to fingers. Always hold the magnet during installation so it doesn't slam with momentum against the steel surface. A contact at a velocity of dozens of km/h means shattering of the magnet. Use safety goggles when playing with powerful specimens.

Table 9: Coating parameters (durability)
MW 100x10 / 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)
Neodymium magnets are highly susceptible to corrosion without proper protection. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (Flux)
MW 100x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 125 951 Mx 1259.5 µWb
Pc Coefficient 0.16 Low (Flat)
Total magnetic flux emitted by the magnet pole. Essential parameter in coil applications and motors. The Pc coefficient defines the working geometry.

Table 11: Underwater work (magnet fishing)
MW 100x10 / N38

Environment Effective steel pull Effect
Air (land) 40.86 kg Standard
Water (riverbed) 46.78 kg
(+5.92 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!
Water displaces steel, making heavy objects slightly lighter. Buoyancy helps in lifting finds.
1. Vertical hold

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

2. Steel thickness impact

*Thin steel (e.g. 0.5mm PC case) severely limits the holding force.

3. Power loss vs temp

*For N38 grade, the safety limit is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.16

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%
Environmental data
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: 010001-2026
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The presented product is a very strong cylindrical magnet, manufactured from advanced NdFeB material, which, at dimensions of Ø100x10 mm, guarantees maximum efficiency. This specific item features an accuracy of ±0.1mm and professional build quality, making it a perfect solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 40.86 kg), this product is in stock from our warehouse in Poland, ensuring lightning-fast order fulfillment. Furthermore, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
It finds application in modeling, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 400.80 N with a weight of only 589.05 g, this rod 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 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 high repeatability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering a great economic balance and operational stability. If you need even stronger magnets in the same volume (Ø100x10), 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 Ø100x10 mm, which, at a weight of 589.05 g, makes it an element with impressive magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 40.86 kg (force ~400.80 N), which, with such defined dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 10 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 and weaknesses of Nd2Fe14B magnets.

Advantages

Besides their durability, neodymium magnets are valued for these benefits:
  • They virtually do not lose strength, because even after ten years the performance loss is only ~1% (in laboratory conditions),
  • They show high resistance to demagnetization induced by external field influence,
  • In other words, due to the glossy finish of nickel, the element gains visual value,
  • Magnets exhibit maximum magnetic induction on the outer side,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Considering the potential of free molding and adaptation to individualized needs, magnetic components can be produced in a variety of shapes and sizes, which amplifies use scope,
  • Huge importance in electronics industry – they are utilized in mass storage devices, brushless drives, advanced medical instruments, also industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which allows their use in miniature devices

Limitations

Drawbacks and weaknesses of neodymium magnets and proposals for their use:
  • They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
  • Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
  • We suggest cover - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complicated forms.
  • Health risk resulting from small fragments of magnets can be dangerous, in case of ingestion, which gains importance in the aspect of protecting the youngest. Additionally, tiny parts of these magnets can disrupt the diagnostic process medical in case of swallowing.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities

Lifting parameters

Maximum magnetic pulling force – what it depends on?

Information about lifting capacity was defined for the most favorable conditions, assuming:
  • with the application of a yoke made of special test steel, ensuring maximum field concentration
  • possessing a thickness of min. 10 mm to ensure full flux closure
  • characterized by lack of roughness
  • with total lack of distance (no impurities)
  • during pulling in a direction vertical to the mounting surface
  • at standard ambient temperature

Lifting capacity in real conditions – factors

During everyday use, the actual lifting capacity depends on a number of factors, listed from crucial:
  • Distance – the presence of any layer (rust, dirt, air) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Force direction – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the maximum value.
  • Steel thickness – insufficiently thick steel does not accept the full field, causing part of the flux to be lost into the air.
  • Plate material – mild steel attracts best. Higher carbon content decrease magnetic properties and lifting capacity.
  • Surface finish – full contact is obtained only on polished steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
  • Temperature influence – hot environment weakens pulling force. Too high temperature can permanently damage the magnet.

Lifting capacity was determined by applying a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, whereas under parallel forces the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet and the plate reduces the load capacity.

Warnings
Warning for heart patients

People with a ICD must maintain an large gap from magnets. The magnetic field can disrupt the operation of the implant.

Respect the power

Before use, check safety instructions. Uncontrolled attraction can break the magnet or injure your hand. Be predictive.

Magnetic interference

Remember: rare earth magnets generate a field that interferes with precision electronics. Maintain a separation from your phone, device, and navigation systems.

Do not drill into magnets

Mechanical processing of NdFeB material poses a fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Maximum temperature

Avoid heat. Neodymium magnets are susceptible to heat. If you require operation above 80°C, ask us about HT versions (H, SH, UH).

Hand protection

Mind your fingers. Two large magnets will join instantly with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!

Avoid contact if allergic

Medical facts indicate that nickel (standard magnet coating) is a potent allergen. If you have an allergy, refrain from touching magnets with bare hands or select encased magnets.

This is not a toy

Absolutely keep magnets out of reach of children. Risk of swallowing is high, and the consequences of magnets connecting inside the body are life-threatening.

Keep away from computers

Intense magnetic fields can corrupt files on credit cards, HDDs, and other magnetic media. Stay away of at least 10 cm.

Protective goggles

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

Attention! Want to know more? Read our article: Are neodymium magnets dangerous?