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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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Lifting power as well as form of a neodymium magnet can be tested using our magnetic calculator.

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Technical parameters of the product - 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

Physical simulation of the assembly - report

The following values are the result of a mathematical simulation. Results are based on algorithms for the material Nd2Fe14B. Actual conditions may differ from theoretical values. Use these calculations as a supplementary guide during assembly planning.

Table 1: Static pull force (pull vs gap) - power drop
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 lbs
48550.0 g / 476.3 N
crushing
1 mm 3318 Gs
331.8 mT
45.21 kg / 99.68 lbs
45214.3 g / 443.6 N
crushing
2 mm 3189 Gs
318.9 mT
41.76 kg / 92.07 lbs
41762.8 g / 409.7 N
crushing
3 mm 3054 Gs
305.4 mT
38.30 kg / 84.44 lbs
38303.2 g / 375.8 N
crushing
5 mm 2774 Gs
277.4 mT
31.61 kg / 69.69 lbs
31610.0 g / 310.1 N
crushing
10 mm 2090 Gs
209.0 mT
17.95 kg / 39.57 lbs
17948.5 g / 176.1 N
crushing
15 mm 1521 Gs
152.1 mT
9.50 kg / 20.95 lbs
9500.8 g / 93.2 N
medium risk
20 mm 1096 Gs
109.6 mT
4.94 kg / 10.88 lbs
4936.3 g / 48.4 N
medium risk
30 mm 585 Gs
58.5 mT
1.41 kg / 3.10 lbs
1407.9 g / 13.8 N
weak grip
50 mm 205 Gs
20.5 mT
0.17 kg / 0.38 lbs
172.6 g / 1.7 N
weak grip

Table 2: Sliding force (wall)
MW 45x15 / N38

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

Table 3: Wall mounting (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 lbs
14565.0 g / 142.9 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
9.71 kg / 21.41 lbs
9710.0 g / 95.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
4.86 kg / 10.70 lbs
4855.0 g / 47.6 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
24.28 kg / 53.52 lbs
24275.0 g / 238.1 N

Table 4: Material efficiency (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 lbs
2427.5 g / 23.8 N
1 mm
13%
6.07 kg / 13.38 lbs
6068.8 g / 59.5 N
2 mm
25%
12.14 kg / 26.76 lbs
12137.5 g / 119.1 N
3 mm
38%
18.21 kg / 40.14 lbs
18206.2 g / 178.6 N
5 mm
63%
30.34 kg / 66.90 lbs
30343.8 g / 297.7 N
10 mm
100%
48.55 kg / 107.03 lbs
48550.0 g / 476.3 N
11 mm
100%
48.55 kg / 107.03 lbs
48550.0 g / 476.3 N
12 mm
100%
48.55 kg / 107.03 lbs
48550.0 g / 476.3 N

Table 5: Thermal resistance (stability) - 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 lbs
48550.0 g / 476.3 N
OK
40 °C -2.2% 47.48 kg / 104.68 lbs
47481.9 g / 465.8 N
OK
60 °C -4.4% 46.41 kg / 102.32 lbs
46413.8 g / 455.3 N
80 °C -6.6% 45.35 kg / 99.97 lbs
45345.7 g / 444.8 N
100 °C -28.8% 34.57 kg / 76.21 lbs
34567.6 g / 339.1 N

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

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

Table 7: Protective zones (electronics) - warnings
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
Mechanical watch 20 Gs (2.0 mT) 12.5 cm
Mobile device 40 Gs (4.0 mT) 10.0 cm
Car key 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: Impact energy (kinetic energy) - 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: Coating parameters (durability)
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: Electrical 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: Hydrostatics and buoyancy
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%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Shear force

*Note: On a vertical surface, the magnet holds merely approx. 20-30% of its nominal pull.

2. Steel thickness impact

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

3. Temperature resistance

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

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

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

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 specification and ecology
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
Magnet Unit Converter
Pulling force

Field Strength

Check out also products

The presented product is a very strong rod magnet, made from durable NdFeB material, which, with dimensions of Ø45x15 mm, guarantees optimal power. This specific item boasts an accuracy of ±0.1mm and industrial build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 48.55 kg), this product is in stock from our warehouse in Poland, ensuring quick 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.
It finds application in modeling, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power of 476.32 N with a weight of only 178.92 g, this rod is indispensable in electronics and wherever low weight is crucial.
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, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Magnets NdFeB grade N38 are strong enough for the majority of applications in automation and machine building, where excessive miniaturization with maximum force is not required. 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 warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 45 mm and height 15 mm. The value of 476.32 N means that the magnet is capable of holding a weight many times exceeding its own mass of 178.92 g. The product has a [NiCuNi] coating, which secures it 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 45 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 as well as cons of Nd2Fe14B magnets.

Strengths

Besides their tremendous strength, neodymium magnets offer the following advantages:
  • Their magnetic field remains stable, and after approximately 10 years it decreases only by ~1% (according to research),
  • Magnets perfectly protect themselves against demagnetization caused by foreign field sources,
  • A magnet with a smooth gold surface is more attractive,
  • Magnetic induction on the surface of the magnet remains impressive,
  • Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
  • Possibility of custom forming as well as optimizing to precise conditions,
  • Versatile presence in advanced technology sectors – they find application in magnetic memories, electric motors, precision medical tools, also technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which allows their use in small systems

Weaknesses

Problematic aspects of neodymium magnets and ways of using them
  • They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
  • Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore while using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • We recommend a housing - magnetic mount, due to difficulties in realizing nuts inside the magnet and complicated shapes.
  • Potential hazard to health – tiny shards of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, small elements of these magnets can be problematic in diagnostics medical when they are in the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Detachment force of the magnet in optimal conditionswhat affects it?

The declared magnet strength refers to the limit force, obtained under optimal environment, specifically:
  • on a block made of mild steel, perfectly concentrating the magnetic field
  • whose thickness is min. 10 mm
  • with an polished touching surface
  • without the slightest insulating layer between the magnet and steel
  • during detachment in a direction perpendicular to the mounting surface
  • at standard ambient temperature

Key elements affecting lifting force

In practice, the real power depends on several key aspects, ranked from most significant:
  • Air gap (between the magnet and the plate), because even a tiny clearance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to paint, corrosion or debris).
  • Direction of force – highest force is reached only during perpendicular pulling. The force required to slide of the magnet along the plate is usually several times smaller (approx. 1/5 of the lifting capacity).
  • Plate thickness – insufficiently thick sheet does not accept the full field, causing part of the power to be wasted to the other side.
  • Steel grade – the best choice is pure iron steel. Stainless steels may attract less.
  • Base smoothness – the more even the plate, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
  • Heat – NdFeB sinters have a sensitivity to temperature. When it is hot they lose power, and in frost they can be stronger (up to a certain limit).

Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under perpendicular forces, in contrast under attempts to slide the magnet the holding force is lower. In addition, even a small distance between the magnet’s surface and the plate decreases the load capacity.

Precautions when working with NdFeB magnets
Swallowing risk

Always keep magnets out of reach of children. Choking hazard is significant, and the effects of magnets connecting inside the body are life-threatening.

Crushing force

Danger of trauma: The attraction force is so immense that it can result in blood blisters, crushing, and broken bones. Protective gloves are recommended.

Immense force

Exercise caution. Neodymium magnets act from a long distance and snap with massive power, often faster than you can react.

Combustion hazard

Fire warning: Neodymium dust is explosive. Avoid machining magnets without safety gear as this may cause fire.

Protective goggles

Despite metallic appearance, the material is delicate and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Data carriers

Avoid bringing magnets close to a purse, laptop, or screen. The magnetic field can irreversibly ruin these devices and wipe information from cards.

Threat to navigation

Note: neodymium magnets produce a field that confuses precision electronics. Keep a safe distance from your mobile, tablet, and GPS.

Medical implants

Life threat: Strong magnets can deactivate heart devices and defibrillators. Stay away if you have electronic implants.

Heat sensitivity

Watch the temperature. Heating the magnet to high heat will permanently weaken its properties and pulling force.

Skin irritation risks

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If skin irritation happens, cease handling magnets and use protective gear.

Safety First! More info about hazards in the article: Safety of working with magnets.