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MW 45x15 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010070

GTIN/EAN: 5906301810698

5.00

Diameter Ø

45 mm [±0,1 mm]

Height

15 mm [±0,1 mm]

Weight

178.92 g

Magnetization Direction

↑ axial

Load capacity

48.55 kg / 476.32 N

Magnetic Induction

343.84 mT / 3438 Gs

Coating

[NiCuNi] Nickel

61.84 with VAT / pcs + price for transport

50.28 ZŁ net + 23% VAT / pcs

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Technical - MW 45x15 / N38 - cylindrical magnet

Specification / characteristics - MW 45x15 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010070
GTIN/EAN 5906301810698
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 45 mm [±0,1 mm]
Height 15 mm [±0,1 mm]
Weight 178.92 g
Magnetization Direction ↑ axial
Load capacity ~ ? 48.55 kg / 476.32 N
Magnetic Induction ~ ? 343.84 mT / 3438 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 45x15 / 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 simulation of the product - report

These data constitute the direct effect of a engineering simulation. Results were calculated on models for the material Nd2Fe14B. Actual performance may deviate from the simulation results. Use these calculations as a reference point during assembly planning.

Table 1: Static force (force vs gap) - characteristics
MW 45x15 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3438 Gs
343.8 mT
48.55 kg / 107.03 pounds
48550.0 g / 476.3 N
dangerous!
1 mm 3318 Gs
331.8 mT
45.21 kg / 99.68 pounds
45214.3 g / 443.6 N
dangerous!
2 mm 3189 Gs
318.9 mT
41.76 kg / 92.07 pounds
41762.8 g / 409.7 N
dangerous!
3 mm 3054 Gs
305.4 mT
38.30 kg / 84.44 pounds
38303.2 g / 375.8 N
dangerous!
5 mm 2774 Gs
277.4 mT
31.61 kg / 69.69 pounds
31610.0 g / 310.1 N
dangerous!
10 mm 2090 Gs
209.0 mT
17.95 kg / 39.57 pounds
17948.5 g / 176.1 N
dangerous!
15 mm 1521 Gs
152.1 mT
9.50 kg / 20.95 pounds
9500.8 g / 93.2 N
warning
20 mm 1096 Gs
109.6 mT
4.94 kg / 10.88 pounds
4936.3 g / 48.4 N
warning
30 mm 585 Gs
58.5 mT
1.41 kg / 3.10 pounds
1407.9 g / 13.8 N
weak grip
50 mm 205 Gs
20.5 mT
0.17 kg / 0.38 pounds
172.6 g / 1.7 N
weak grip

Table 2: Slippage load (wall)
MW 45x15 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 9.71 kg / 21.41 pounds
9710.0 g / 95.3 N
1 mm Stal (~0.2) 9.04 kg / 19.93 pounds
9042.0 g / 88.7 N
2 mm Stal (~0.2) 8.35 kg / 18.41 pounds
8352.0 g / 81.9 N
3 mm Stal (~0.2) 7.66 kg / 16.89 pounds
7660.0 g / 75.1 N
5 mm Stal (~0.2) 6.32 kg / 13.94 pounds
6322.0 g / 62.0 N
10 mm Stal (~0.2) 3.59 kg / 7.91 pounds
3590.0 g / 35.2 N
15 mm Stal (~0.2) 1.90 kg / 4.19 pounds
1900.0 g / 18.6 N
20 mm Stal (~0.2) 0.99 kg / 2.18 pounds
988.0 g / 9.7 N
30 mm Stal (~0.2) 0.28 kg / 0.62 pounds
282.0 g / 2.8 N
50 mm Stal (~0.2) 0.03 kg / 0.07 pounds
34.0 g / 0.3 N

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 45x15 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
14.56 kg / 32.11 pounds
14565.0 g / 142.9 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
9.71 kg / 21.41 pounds
9710.0 g / 95.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
4.86 kg / 10.70 pounds
4855.0 g / 47.6 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
24.28 kg / 53.52 pounds
24275.0 g / 238.1 N

Table 4: Steel thickness (saturation) - sheet metal selection
MW 45x15 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
2.43 kg / 5.35 pounds
2427.5 g / 23.8 N
1 mm
13%
6.07 kg / 13.38 pounds
6068.8 g / 59.5 N
2 mm
25%
12.14 kg / 26.76 pounds
12137.5 g / 119.1 N
3 mm
38%
18.21 kg / 40.14 pounds
18206.2 g / 178.6 N
5 mm
63%
30.34 kg / 66.90 pounds
30343.8 g / 297.7 N
10 mm
100%
48.55 kg / 107.03 pounds
48550.0 g / 476.3 N
11 mm
100%
48.55 kg / 107.03 pounds
48550.0 g / 476.3 N
12 mm
100%
48.55 kg / 107.03 pounds
48550.0 g / 476.3 N

Table 5: Thermal stability (material behavior) - thermal limit
MW 45x15 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 48.55 kg / 107.03 pounds
48550.0 g / 476.3 N
OK
40 °C -2.2% 47.48 kg / 104.68 pounds
47481.9 g / 465.8 N
OK
60 °C -4.4% 46.41 kg / 102.32 pounds
46413.8 g / 455.3 N
80 °C -6.6% 45.35 kg / 99.97 pounds
45345.7 g / 444.8 N
100 °C -28.8% 34.57 kg / 76.21 pounds
34567.6 g / 339.1 N

Table 6: Two magnets (repulsion) - forces in the system
MW 45x15 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 115.89 kg / 255.50 pounds
4 958 Gs
17.38 kg / 38.32 pounds
17384 g / 170.5 N
N/A
1 mm 111.99 kg / 246.89 pounds
6 759 Gs
16.80 kg / 37.03 pounds
16798 g / 164.8 N
100.79 kg / 222.20 pounds
~0 Gs
2 mm 107.93 kg / 237.94 pounds
6 636 Gs
16.19 kg / 35.69 pounds
16189 g / 158.8 N
97.14 kg / 214.15 pounds
~0 Gs
3 mm 103.82 kg / 228.89 pounds
6 508 Gs
15.57 kg / 34.33 pounds
15573 g / 152.8 N
93.44 kg / 206.00 pounds
~0 Gs
5 mm 95.55 kg / 210.66 pounds
6 244 Gs
14.33 kg / 31.60 pounds
14333 g / 140.6 N
86.00 kg / 189.59 pounds
~0 Gs
10 mm 75.46 kg / 166.35 pounds
5 548 Gs
11.32 kg / 24.95 pounds
11318 g / 111.0 N
67.91 kg / 149.72 pounds
~0 Gs
20 mm 42.84 kg / 94.46 pounds
4 181 Gs
6.43 kg / 14.17 pounds
6427 g / 63.0 N
38.56 kg / 85.01 pounds
~0 Gs
50 mm 6.20 kg / 13.67 pounds
1 591 Gs
0.93 kg / 2.05 pounds
930 g / 9.1 N
5.58 kg / 12.31 pounds
~0 Gs
60 mm 3.36 kg / 7.41 pounds
1 171 Gs
0.50 kg / 1.11 pounds
504 g / 4.9 N
3.02 kg / 6.67 pounds
~0 Gs
70 mm 1.89 kg / 4.16 pounds
877 Gs
0.28 kg / 0.62 pounds
283 g / 2.8 N
1.70 kg / 3.74 pounds
~0 Gs
80 mm 1.10 kg / 2.42 pounds
669 Gs
0.16 kg / 0.36 pounds
165 g / 1.6 N
0.99 kg / 2.18 pounds
~0 Gs
90 mm 0.66 kg / 1.46 pounds
520 Gs
0.10 kg / 0.22 pounds
99 g / 1.0 N
0.60 kg / 1.31 pounds
~0 Gs
100 mm 0.41 kg / 0.91 pounds
410 Gs
0.06 kg / 0.14 pounds
62 g / 0.6 N
0.37 kg / 0.82 pounds
~0 Gs

Table 7: Protective zones (electronics) - precautionary measures
MW 45x15 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 20.5 cm
Hearing aid 10 Gs (1.0 mT) 16.0 cm
Timepiece 20 Gs (2.0 mT) 12.5 cm
Mobile device 40 Gs (4.0 mT) 10.0 cm
Remote 50 Gs (5.0 mT) 9.0 cm
Payment card 400 Gs (40.0 mT) 4.0 cm
HDD hard drive 600 Gs (60.0 mT) 3.0 cm

Table 8: Collisions (cracking risk) - collision effects
MW 45x15 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 20.09 km/h
(5.58 m/s)
2.79 J
30 mm 29.29 km/h
(8.14 m/s)
5.92 J
50 mm 37.23 km/h
(10.34 m/s)
9.57 J
100 mm 52.54 km/h
(14.59 m/s)
19.05 J

Table 9: Corrosion resistance
MW 45x15 / 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 45x15 / N38

Parameter Value SI Unit / Description
Magnetic Flux 57 854 Mx 578.5 µWb
Pc Coefficient 0.44 Low (Flat)

Table 11: Underwater work (magnet fishing)
MW 45x15 / N38

Environment Effective steel pull Effect
Air (land) 48.55 kg Standard
Water (riverbed) 55.59 kg
(+7.04 kg buoyancy gain)
+14.5%
Warning: 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

*Caution: On a vertical wall, the magnet retains merely a fraction of its perpendicular strength.

2. Plate thickness effect

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

3. Power loss vs temp

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.44

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 and environmental data
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: 010070-2026
Quick Unit Converter
Pulling force

Magnetic Induction

Other products

The presented product is a very strong cylindrical magnet, produced from advanced NdFeB material, which, at dimensions of Ø45x15 mm, guarantees maximum efficiency. This specific item boasts an accuracy of ±0.1mm and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a magnetic rod with significant force (approx. 48.55 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
This model is perfect for building generators, advanced sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the high power of 476.32 N with a weight of only 178.92 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. To ensure stability in automation, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering a great economic balance and operational stability. If you need the strongest magnets in the same volume (Ø45x15), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.
This model is characterized by dimensions Ø45x15 mm, which, at a weight of 178.92 g, makes it an element with high magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 48.55 kg (force ~476.32 N), which, with such compact dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which secures it against oxidation, 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 45 mm. 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 and disadvantages of neodymium magnets.

Strengths

Besides their tremendous field intensity, neodymium magnets offer the following advantages:
  • Their magnetic field is maintained, and after approximately ten years it drops only by ~1% (theoretically),
  • Neodymium magnets are exceptionally resistant to loss of magnetic properties caused by external magnetic fields,
  • A magnet with a metallic nickel surface looks better,
  • The surface of neodymium magnets generates a intense magnetic field – this is one of their assets,
  • Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
  • Thanks to versatility in designing and the capacity to customize to individual projects,
  • Significant place in innovative solutions – they are utilized in mass storage devices, drive modules, advanced medical instruments, and complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which makes them useful in compact constructions

Limitations

Disadvantages of NdFeB magnets:
  • To avoid cracks under impact, we suggest using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • They rust in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in realizing nuts and complex shapes in magnets, we recommend using casing - magnetic holder.
  • Health risk related to microscopic parts of magnets are risky, if swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, small elements of these devices can complicate diagnosis medical after entering the body.
  • With mass production the cost of neodymium magnets is economically unviable,

Pull force analysis

Maximum magnetic pulling forcewhat contributes to it?

Holding force of 48.55 kg is a theoretical maximum value performed under specific, ideal conditions:
  • with the contact of a sheet made of special test steel, guaranteeing full magnetic saturation
  • whose transverse dimension reaches at least 10 mm
  • with a surface cleaned and smooth
  • without the slightest clearance between the magnet and steel
  • under perpendicular application of breakaway force (90-degree angle)
  • at ambient temperature room level

Lifting capacity in practice – influencing factors

In real-world applications, the real power depends on several key aspects, listed from most significant:
  • Distance (between the magnet and the plate), as even a microscopic distance (e.g. 0.5 mm) results in a drastic drop in lifting capacity by up to 50% (this also applies to paint, corrosion or debris).
  • Force direction – catalog parameter refers to pulling vertically. When applying parallel force, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Steel grade – ideal substrate is pure iron steel. Cast iron may generate lower lifting capacity.
  • Smoothness – ideal contact is possible only on smooth steel. Rough texture reduce the real contact area, reducing force.
  • Temperature influence – high temperature weakens pulling force. Too high temperature can permanently damage the magnet.

Lifting capacity was assessed with the use of a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, however under parallel forces the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the lifting capacity.

Safety rules for work with neodymium magnets
Dust explosion hazard

Dust created during grinding of magnets is flammable. Avoid drilling into magnets unless you are an expert.

Demagnetization risk

Keep cool. NdFeB magnets are susceptible to temperature. If you require operation above 80°C, look for HT versions (H, SH, UH).

Powerful field

Handle magnets consciously. Their huge power can surprise even professionals. Plan your moves and respect their power.

Impact on smartphones

GPS units and smartphones are extremely susceptible to magnetism. Direct contact with a strong magnet can ruin the sensors in your phone.

Serious injuries

Big blocks can break fingers instantly. Never put your hand between two attracting surfaces.

Protective goggles

Beware of splinters. Magnets can explode upon uncontrolled impact, launching shards into the air. We recommend safety glasses.

Avoid contact if allergic

Allergy Notice: The nickel-copper-nickel coating contains nickel. If skin irritation occurs, cease handling magnets and wear gloves.

Safe distance

Avoid bringing magnets near a wallet, laptop, or screen. The magnetic field can permanently damage these devices and wipe information from cards.

Warning for heart patients

For implant holders: Strong magnetic fields disrupt electronics. Keep minimum 30 cm distance or ask another person to work with the magnets.

Choking Hazard

Adult use only. Small elements pose a choking risk, causing serious injuries. Store out of reach of kids and pets.

Safety First! Looking for details? Read our article: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98