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MW 100x10 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010001

GTIN/EAN: 5906301810018

5.00
Load capacity 40.86 kg / 400.80 N Magnetic Induction 121.59 mT / 1216 Gs
Diameter Ø
100 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
589.05 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel
product parameters »

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Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

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Technical details - 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

Physical simulation of the assembly - data

These data constitute the direct effect of a mathematical calculation. Values are based on algorithms for the material Nd2Fe14B. Real-world parameters might slightly deviate from the simulation results. Treat these data as a supplementary guide during assembly planning.

Table 1: Static force (pull 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
 critical level
1 mm 1208 Gs
120.8 mT
 40.35 kg / 88.95 lbs
40345.4 g / 395.8 N
 critical level
2 mm 1199 Gs
119.9 mT
 39.74 kg / 87.62 lbs
39742.7 g / 389.9 N
 critical level
3 mm 1189 Gs
118.9 mT
 39.06 kg / 86.12 lbs
39062.0 g / 383.2 N
 critical level
5 mm 1165 Gs
116.5 mT
 37.49 kg / 82.65 lbs
37490.2 g / 367.8 N
 critical level
10 mm 1087 Gs
108.7 mT
 32.64 kg / 71.96 lbs
32640.7 g / 320.2 N
 critical level
15 mm 991 Gs
99.1 mT
 27.15 kg / 59.86 lbs
27153.9 g / 266.4 N
 critical level
20 mm 887 Gs
88.7 mT
 21.76 kg / 47.97 lbs
21758.7 g / 213.5 N
 critical level
30 mm 683 Gs
68.3 mT
 12.90 kg / 28.45 lbs
12902.7 g / 126.6 N
 critical level
50 mm 379 Gs
37.9 mT
 3.97 kg / 8.75 lbs
3968.4 g / 38.9 N
 strong
Grip strength drops significantly with every subsequent millimeter of distance. Note that even the smallest gap (e.g., contamination, varnish, veneer) significantly weakens the grip. Magnets hold optimally at the point of direct contact; distance nullifies the force. Observe how quickly the parameters drop, when the product does not adhere directly to the steel surface. When designing the arrangement, avoid unnecessary gaps.

Table 2: Vertical load (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
The table below indicates the approximate weight limit required to cause the sliding of the magnet downwards on a vertical steel wall (considering standard friction). This parameter is relative to the separation distance 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 element on a upright surface (e.g., a board), it will only hold barely approx. 20%-30% of its maximum pull force. Gravitational force and a low friction coefficient cause that holders move down easier than they detach. Planning a hanger? Consider that the shear force is noticeably lower than the maximum static pull force. On a smooth steel, the holder will give way down under a much lighter load. Using a rubber layer can effectively increase the grip.

Table 4: Material efficiency (substrate influence) - power losses
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 metal plate is not enough to focus the entire magnetic field, which wastes potential of the holder. If you install a neodymium to a thin surface, the magnetism will pass right through and the holding will be smaller. To utilize full efficiency of this neodymium's power, you require a sufficiently solid element of steel. The material oversaturation causes that on delicate walls (e.g., thin profiles), the holder shows lower pull force. We advise picking the steel dimension based on the following data.

Table 5: Thermal stability (stability) - thermal limit
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 lose strength after exceeding the maximum temperature. Avoid high temperatures – excessive heat can permanently damage this magnet. With increasing heat, the magnet's force temporarily lowers. Do not use this magnet near heat sources exceeding its safe range. Ignoring the limit will result in destruction of magnetic properties.
*Technical advisory: Thermal stability depends not only on the material grade, as well as the dimension ratios. Low-profile magnets (low Pc) are more susceptible to demagnetization under lower heat stress compared to rod magnets. The danger warning in the table signals 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 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 wider radius than a neodymium and metal combination. The connection of magnet-to-magnet produces a massive flux and a wider radius of operation. Planning to create a powerful holder? Utilize two neodymiums instead of one magnet and a steel. Remember that when attracting two neodymiums, the impact force is massive. The levitation is marginally weaker than the connection force, but still large.
*Flux density for N-N configuration reaches ~0 Gs at the geometric center between the magnets (caused by magnetic field nullification).
Attention: Calculations show sliding force of dual matching neodymium magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Hazards (electronics) - 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
Timepiece 20 Gs (2.0 mT) 19.0 cm
Phone / Smartphone 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
Powerful magnet radiation is a serious hazard to electronic devices and medical implants. These magnets generate a flux that prevents correct functioning of digital equipment. Be aware: the unseen radiation acts through matter and glass. Increased vigilance must be exercised by people with hearing aids and insulin pumps. Influence will be felt by: automatic timepieces, car keys, speakers, and screens. Do not bring the product near payment cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - collision effects
MW 100x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 12.68 km/h
(3.52 m/s)
 3.65 J
30 mm 18.75 km/h
(5.21 m/s)
 7.99 J
50 mm 20.43 km/h
(5.68 m/s)
 9.49 J
100 mm 21.11 km/h
(5.87 m/s)
 10.13 J
Neodymium magnets are very brittle – a strong collision with metal can result in shattering. Control the attraction moment – a neodymium left loose turns into a projectile. Impact energy can destroy the magnet or dangerous crushing to fingers. Be sure to control the product during installation 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 magnet. Wear eye protection when handling 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. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction data (Pc)
MW 100x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 125 951 Mx 1259.5 µWb
Pc Coefficient 0.16 Low (Flat)
Flux value passing through the pole surface. Key data in coil applications as well as sensors. Pc value determines the magnet's operating point.

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%
Rust risk: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
The magnetic field penetrates through water without any losses. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Vertical hold

*Caution: On a vertical wall, the magnet retains only ~20% of its nominal pull.

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) significantly weakens the holding force.

3. Thermal stability

*For N38 material, the critical 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.

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%

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 an exceptionally strong cylinder magnet, composed of durable NdFeB material, which, with dimensions of Ø100x10 mm, guarantees optimal power. The MW 100x10 / N38 model boasts an accuracy of ±0.1mm and professional build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with significant force (approx. 40.86 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Moreover, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is perfect for building generators, advanced sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the high power of 400.80 N with a weight of only 589.05 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.
Due to the delicate structure of the ceramic sinter, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this precision 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 frequently chosen standard for industrial neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need the strongest 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 lifting capacity amounting to approximately 40.86 kg (force ~400.80 N), which, with such compact dimensions, proves the high grade of the NdFeB material. 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 10 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 diametrically if your project requires it.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Benefits

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • Their power remains stable, and after approximately ten years it decreases only by ~1% (theoretically),
  • They feature excellent resistance to magnetic field loss when exposed to opposing magnetic fields,
  • A magnet with a metallic silver surface has better aesthetics,
  • Magnets have very high magnetic induction on the outer layer,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Thanks to versatility in forming and the capacity to modify to unusual requirements,
  • Universal use in future technologies – they are commonly used in hard drives, brushless drives, medical equipment, also industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in compact constructions

Limitations

Problematic aspects of neodymium magnets: tips and applications.
  • To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in realizing threads and complicated shapes in magnets, we propose using a housing - magnetic mount.
  • Possible danger related to microscopic parts of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child safety. It is also worth noting that tiny parts of these magnets are able to complicate diagnosis medical in case of swallowing.
  • Due to expensive raw materials, their price is relatively high,

Lifting parameters

Maximum holding power of the magnet – what it depends on?

The lifting capacity listed is a theoretical maximum value executed under specific, ideal conditions:
  • on a base made of mild steel, perfectly concentrating the magnetic field
  • with a cross-section no less than 10 mm
  • characterized by lack of roughness
  • with zero gap (no coatings)
  • under vertical force direction (90-degree angle)
  • at standard ambient temperature

Determinants of practical lifting force of a magnet

Holding efficiency impacted by working environment parameters, such as (from priority):
  • Distance – the presence of foreign body (paint, tape, gap) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Force direction – catalog parameter refers to detachment vertically. When slipping, the magnet holds much less (typically approx. 20-30% of maximum force).
  • Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Steel type – low-carbon steel attracts best. Higher carbon content reduce magnetic properties and lifting capacity.
  • Surface finish – full contact is possible only on polished steel. Any scratches and bumps create air cushions, reducing force.
  • Temperature influence – hot environment reduces pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was determined by applying a polished steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, in contrast under shearing force the load capacity is reduced by as much as fivefold. In addition, even a small distance between the magnet’s surface and the plate lowers the load capacity.

Safety rules for work with neodymium magnets
Thermal limits

Keep cool. Neodymium magnets are susceptible to temperature. If you require operation above 80°C, look for special high-temperature series (H, SH, UH).

Immense force

Handle with care. Neodymium magnets act from a distance and connect with huge force, often faster than you can move away.

Nickel coating and allergies

Certain individuals have a contact allergy to nickel, which is the common plating for neodymium magnets. Frequent touching may cause dermatitis. We suggest wear protective gloves.

Protective goggles

Watch out for shards. Magnets can fracture upon uncontrolled impact, ejecting sharp fragments into the air. We recommend safety glasses.

Protect data

Device Safety: Strong magnets can ruin data carriers and sensitive devices (heart implants, hearing aids, timepieces).

Magnetic interference

Remember: neodymium magnets generate a field that disrupts sensitive sensors. Keep a separation from your mobile, tablet, and GPS.

Fire warning

Powder created during cutting of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.

Bone fractures

Risk of injury: The pulling power is so immense that it can cause blood blisters, crushing, and broken bones. Use thick gloves.

Pacemakers

Individuals with a pacemaker must maintain an safe separation from magnets. The magnetic field can disrupt the functioning of the life-saving device.

Keep away from children

Product intended for adults. Tiny parts can be swallowed, causing severe trauma. Keep out of reach of kids and pets.

Attention! Looking for details? Read our article: Are neodymium magnets dangerous?