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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

see properties »

368.50 ZŁ with VAT / pcs + price for transport

299.59 ZŁ net + 23% VAT / pcs

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Detailed specification - 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

Engineering modeling of the product - technical parameters

The following values constitute the result of a engineering analysis. Results rely on algorithms for the material Nd2Fe14B. Operational performance might slightly differ. Treat these calculations as a reference point for designers.

Table 1: Static force (force vs distance) - 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 drops drastically with every mm of gap. Keep in mind that even a microscopic distance (e.g., dirt, varnish, dust) noticeably weakens the grip. Magnetic products operate strongest at the point of direct contact; gap kills the force. Analyze how quickly the parameters plummet, when the magnet does not touch directly to the steel surface. When planning the assembly, discard redundant distances.

Table 2: Sliding force (vertical surface)
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
The following data defines the estimated force required to cause the shifting of the magnet downwards on a vertical steel plate (assuming typical friction). The holding force depends on the air gap between the magnet and the metal.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
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 holder on a vertical surface (e.g., a car body), it you can count on just approx. 20%-30% of its nominal power. Gravitational force as well as a weak degree of grip influence the fact that magnets slip faster than they pop off the substrate. Want to create a wall mount? Consider that the shear force is much weaker than the maximum static pull force. On a smooth steel, the magnet will slip down under a significantly smaller cargo. Utilizing a rubberized coating can effectively improve the result.

Table 4: Material efficiency (substrate influence) - 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 unable to conduct the full magnetic flux, which squanders power of the holder. Should you mount a strong magnet to a too thin substrate, the field will penetrate right through and the pull force will drop sharply. To achieve the maximum of this magnet's potential, you need a suitably thick backing of steel. The saturation phenomenon means that on sheet metal structures (e.g., appliance housings), the product holds weaker. We advise picking the steel cross-section from these parameters.

Table 5: Working in heat (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
Standard neodymium magnets irreversibly lose power above the temperature limit. Avoid high temperatures – excessive heat can irreversibly damage this product. With every degree above norm, the neodymium's power momentarily drops. Refrain from using this product close to ovens exceeding its safe range. Exceeding the critical threshold will cause destruction of magnetic properties.
*Technical advisory: Temperature resistance is determined by both grade, and the Permeance Coefficient Pc. Flat magnets (low permeance coefficient) risk losing magnetic properties at lower temperatures than taller cylinders. Warning indicator in the table indicates permanent field degradation for this specific geometry.

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

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (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 magnets attract each other from a wider radius than a magnet and sheet combination. The connection of two magnets creates a more powerful interaction and a larger range of action. Designing a solid fastener? Utilize two neodymiums instead of one magnet and a striker plate. Exercise caution that when attracting two neodymiums, the pinch force is massive. The repulsion force is marginally weaker than the connection force, but still impressive.
*Flux density in repulsion mode is approximately ~0 Gs at the midpoint between the magnets (due to field cancellation).
Note: Results apply to shear force of a pair of matching magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (implants) - warnings
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
Mechanical watch 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
Extremely neodym field poses a serious hazard to electronics and medical implants. These neodymiums produce a field that prevents correct functioning of sensitive medical devices. Be aware: the invisible magnetic field acts through matter and glass. Exceptional care must be exercised by people with cochlear implants and insulin pumps. Also at risk are: mechanical watches, remotes, speakers, and screens. Do not bring the product near payment cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (cracking risk) - warning
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
NdFeB products are very brittle – a strong collision with metal can result in shattering. Control the attraction moment – a neodymium left loose becomes dangerous. Kinetic force can trigger coating fragments or injury to skin. Hold the magnet firmly during bringing near metal so it doesn't slam with momentum against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Wear safety glasses when playing with large magnets.

Table 9: Anti-corrosion coating 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)
For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Construction 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 passing through the magnet pole. Essential parameter when building generators and motors. The Pc coefficient determines the working geometry.

Table 11: Hydrostatics and buoyancy
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%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
The magnetic field penetrates through water without any losses. Buoyancy helps in lifting finds.
1. Vertical hold

*Note: On a vertical wall, the magnet retains only approx. 20-30% of its nominal pull.

2. Steel saturation

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

3. Heat tolerance

*For N38 grade, the max working temp is 80°C.

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

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

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.

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: 010001-2026
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The presented product is an extremely powerful cylindrical magnet, produced from durable NdFeB material, which, with dimensions of Ø100x10 mm, guarantees the highest energy density. This specific item boasts a tolerance of ±0.1mm and industrial build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 40.86 kg), this product is in stock from our European logistics center, ensuring rapid order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
It successfully proves itself in DIY projects, 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 cylindrical magnet is indispensable in electronics 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 durability of the connection.
Magnets N38 are strong enough for the majority of applications in automation and machine building, where extreme miniaturization with maximum force is not required. 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.
The presented product is a neodymium magnet with precisely defined parameters: diameter 100 mm and height 10 mm. The key parameter here is the holding force amounting to approximately 40.86 kg (force ~400.80 N), which, with such compact 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 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 diametrically if your project requires it.

Pros and cons of neodymium magnets.

Strengths

Besides their high retention, neodymium magnets are valued for these benefits:
  • Their power is durable, and after approximately ten years it drops only by ~1% (theoretically),
  • Neodymium magnets are extremely resistant to magnetic field loss caused by magnetic disturbances,
  • A magnet with a smooth gold surface has better aesthetics,
  • Magnetic induction on the surface of the magnet is strong,
  • Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
  • Due to the option of accurate forming and adaptation to specialized solutions, NdFeB magnets can be produced in a broad palette of geometric configurations, which expands the range of possible applications,
  • Significant place in modern industrial fields – they serve a role in mass storage devices, electric drive systems, medical equipment, as well as complex engineering applications.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Cons

Drawbacks and weaknesses of neodymium magnets: tips and applications.
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a strong case, which not only secures them against impacts but also raises their durability
  • When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • They oxidize in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • We suggest casing - magnetic mechanism, due to difficulties in producing threads inside the magnet and complex shapes.
  • Possible danger resulting from small fragments of magnets are risky, if swallowed, which becomes key in the aspect of protecting the youngest. Additionally, small components of these products are able to complicate diagnosis medical in case of swallowing.
  • With mass production the cost of neodymium magnets is a challenge,

Lifting parameters

Highest magnetic holding force – what it depends on?

Holding force of 40.86 kg is a theoretical maximum value performed under the following configuration:
  • using a base made of mild steel, functioning as a circuit closing element
  • whose thickness is min. 10 mm
  • characterized by smoothness
  • with total lack of distance (no impurities)
  • for force applied at a right angle (in the magnet axis)
  • at temperature room level

Impact of factors on magnetic holding capacity in practice

Real force is influenced by working environment parameters, mainly (from most important):
  • Clearance – existence of any layer (paint, tape, air) acts as an insulator, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Load vector – highest force is available only during perpendicular pulling. The resistance to sliding of the magnet along the plate is standardly many times smaller (approx. 1/5 of the lifting capacity).
  • Element thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Chemical composition of the base – mild steel attracts best. Higher carbon content decrease magnetic properties and lifting capacity.
  • Surface structure – the smoother and more polished the plate, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
  • Operating temperature – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and at low temperatures gain strength (up to a certain limit).

Lifting capacity was determined with the use of a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet’s surface and the plate decreases the load capacity.

H&S for magnets
Dust is flammable

Fire hazard: Rare earth powder is explosive. Do not process magnets without safety gear as this may cause fire.

Shattering risk

Despite the nickel coating, the material is brittle and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Caution required

Use magnets consciously. Their powerful strength can shock even experienced users. Stay alert and do not underestimate their force.

Keep away from electronics

Be aware: neodymium magnets produce a field that interferes with precision electronics. Keep a safe distance from your mobile, device, and navigation systems.

Bodily injuries

Watch your fingers. Two powerful magnets will snap together instantly with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!

Keep away from computers

Equipment safety: Neodymium magnets can ruin data carriers and delicate electronics (heart implants, hearing aids, mechanical watches).

Life threat

Health Alert: Neodymium magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.

Demagnetization risk

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

Skin irritation risks

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If an allergic reaction happens, immediately stop handling magnets and wear gloves.

Swallowing risk

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

Safety First! Need more info? Check our post: Are neodymium magnets dangerous?