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MW 5x5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010503

GTIN/EAN: 5906301814979

5.00

Diameter Ø

5 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

0.74 g

Magnetization Direction

↑ axial

Load capacity

0.79 kg / 7.76 N

Magnetic Induction

553.14 mT / 5531 Gs

Coating

[NiCuNi] Nickel

0.394 with VAT / pcs + price for transport

0.320 ZŁ net + 23% VAT / pcs

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Technical details - MW 5x5 / N38 - cylindrical magnet

Specification / characteristics - MW 5x5 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010503
GTIN/EAN 5906301814979
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 5 mm [±0,1 mm]
Height 5 mm [±0,1 mm]
Weight 0.74 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.79 kg / 7.76 N
Magnetic Induction ~ ? 553.14 mT / 5531 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 5x5 / 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 assembly - technical parameters

Presented data constitute the direct effect of a physical simulation. Results are based on models for the material Nd2Fe14B. Real-world performance might slightly differ. Treat these calculations as a reference point for designers.

Table 1: Static pull force (pull vs gap) - characteristics
MW 5x5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5523 Gs
552.3 mT
0.79 kg / 1.74 pounds
790.0 g / 7.7 N
weak grip
1 mm 3420 Gs
342.0 mT
0.30 kg / 0.67 pounds
303.0 g / 3.0 N
weak grip
2 mm 1966 Gs
196.6 mT
0.10 kg / 0.22 pounds
100.1 g / 1.0 N
weak grip
3 mm 1155 Gs
115.5 mT
0.03 kg / 0.08 pounds
34.5 g / 0.3 N
weak grip
5 mm 469 Gs
46.9 mT
0.01 kg / 0.01 pounds
5.7 g / 0.1 N
weak grip
10 mm 101 Gs
10.1 mT
0.00 kg / 0.00 pounds
0.3 g / 0.0 N
weak grip
15 mm 36 Gs
3.6 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip
20 mm 17 Gs
1.7 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip
30 mm 6 Gs
0.6 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip
50 mm 1 Gs
0.1 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip

Table 2: Shear load (vertical surface)
MW 5x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.16 kg / 0.35 pounds
158.0 g / 1.5 N
1 mm Stal (~0.2) 0.06 kg / 0.13 pounds
60.0 g / 0.6 N
2 mm Stal (~0.2) 0.02 kg / 0.04 pounds
20.0 g / 0.2 N
3 mm Stal (~0.2) 0.01 kg / 0.01 pounds
6.0 g / 0.1 N
5 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
10 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 5x5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.24 kg / 0.52 pounds
237.0 g / 2.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.16 kg / 0.35 pounds
158.0 g / 1.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.08 kg / 0.17 pounds
79.0 g / 0.8 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.40 kg / 0.87 pounds
395.0 g / 3.9 N

Table 4: Steel thickness (saturation) - sheet metal selection
MW 5x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.08 kg / 0.17 pounds
79.0 g / 0.8 N
1 mm
25%
0.20 kg / 0.44 pounds
197.5 g / 1.9 N
2 mm
50%
0.40 kg / 0.87 pounds
395.0 g / 3.9 N
3 mm
75%
0.59 kg / 1.31 pounds
592.5 g / 5.8 N
5 mm
100%
0.79 kg / 1.74 pounds
790.0 g / 7.7 N
10 mm
100%
0.79 kg / 1.74 pounds
790.0 g / 7.7 N
11 mm
100%
0.79 kg / 1.74 pounds
790.0 g / 7.7 N
12 mm
100%
0.79 kg / 1.74 pounds
790.0 g / 7.7 N

Table 5: Working in heat (stability) - thermal limit
MW 5x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.79 kg / 1.74 pounds
790.0 g / 7.7 N
OK
40 °C -2.2% 0.77 kg / 1.70 pounds
772.6 g / 7.6 N
OK
60 °C -4.4% 0.76 kg / 1.67 pounds
755.2 g / 7.4 N
OK
80 °C -6.6% 0.74 kg / 1.63 pounds
737.9 g / 7.2 N
100 °C -28.8% 0.56 kg / 1.24 pounds
562.5 g / 5.5 N

Table 6: Two magnets (repulsion) - field range
MW 5x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 3.69 kg / 8.14 pounds
5 990 Gs
0.55 kg / 1.22 pounds
554 g / 5.4 N
N/A
1 mm 2.37 kg / 5.23 pounds
8 857 Gs
0.36 kg / 0.79 pounds
356 g / 3.5 N
2.14 kg / 4.71 pounds
~0 Gs
2 mm 1.42 kg / 3.12 pounds
6 841 Gs
0.21 kg / 0.47 pounds
212 g / 2.1 N
1.27 kg / 2.81 pounds
~0 Gs
3 mm 0.82 kg / 1.80 pounds
5 194 Gs
0.12 kg / 0.27 pounds
122 g / 1.2 N
0.73 kg / 1.62 pounds
~0 Gs
5 mm 0.27 kg / 0.60 pounds
2 996 Gs
0.04 kg / 0.09 pounds
41 g / 0.4 N
0.24 kg / 0.54 pounds
~0 Gs
10 mm 0.03 kg / 0.06 pounds
939 Gs
0.00 kg / 0.01 pounds
4 g / 0.0 N
0.02 kg / 0.05 pounds
~0 Gs
20 mm 0.00 kg / 0.00 pounds
202 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
19 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
60 mm 0.00 kg / 0.00 pounds
11 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.00 pounds
7 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
5 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.00 pounds
4 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.00 pounds
3 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Hazards (implants) - warnings
MW 5x5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 3.5 cm
Hearing aid 10 Gs (1.0 mT) 2.5 cm
Timepiece 20 Gs (2.0 mT) 2.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 1.5 cm
Car key 50 Gs (5.0 mT) 1.5 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 0.5 cm

Table 8: Collisions (kinetic energy) - warning
MW 5x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 32.96 km/h
(9.16 m/s)
0.03 J
30 mm 57.07 km/h
(15.85 m/s)
0.09 J
50 mm 73.68 km/h
(20.47 m/s)
0.15 J
100 mm 104.20 km/h
(28.95 m/s)
0.31 J

Table 9: Coating parameters (durability)
MW 5x5 / 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 (Pc)
MW 5x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 1 120 Mx 11.2 µWb
Pc Coefficient 0.89 High (Stable)

Table 11: Submerged application
MW 5x5 / N38

Environment Effective steel pull Effect
Air (land) 0.79 kg Standard
Water (riverbed) 0.90 kg
(+0.11 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. Sliding resistance

*Caution: On a vertical surface, the magnet retains merely a fraction of its max power.

2. Steel saturation

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

3. Temperature resistance

*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) = 0.89

The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. 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: 010503-2026
Magnet Unit Converter
Pulling force

Field Strength

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This product is an exceptionally strong cylinder magnet, composed of advanced NdFeB material, which, at dimensions of Ø5x5 mm, guarantees the highest energy density. This specific item boasts high dimensional repeatability and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 0.79 kg), this product is in stock from our European logistics center, ensuring rapid order fulfillment. Additionally, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the pull force of 7.76 N with a weight of only 0.74 g, this cylindrical magnet is indispensable in electronics and wherever every gram matters.
Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure stability in industry, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Magnets NdFeB grade N38 are strong enough for 90% of applications in automation and machine building, where extreme miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø5x5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 5 mm and height 5 mm. The value of 7.76 N means that the magnet is capable of holding a weight many times exceeding its own mass of 0.74 g. The product has a [NiCuNi] coating, which protects the surface against oxidation, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 5 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 and disadvantages of rare earth magnets.

Advantages

Apart from their superior holding force, neodymium magnets have these key benefits:
  • They do not lose magnetism, even over nearly ten years – the drop in lifting capacity is only ~1% (based on measurements),
  • Magnets very well defend themselves against demagnetization caused by ambient magnetic noise,
  • By using a lustrous coating of gold, the element has an nice look,
  • Neodymium magnets create maximum magnetic induction on a small area, which allows for strong attraction,
  • Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to versatility in constructing and the capacity to adapt to complex applications,
  • Universal use in innovative solutions – they are utilized in HDD drives, electric drive systems, diagnostic systems, also complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which allows their use in miniature devices

Weaknesses

Characteristics of disadvantages of neodymium magnets: tips and applications.
  • Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a strong case, which not only protects them against impacts but also raises their durability
  • Neodymium magnets lose their force 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
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
  • Limited possibility of making threads in the magnet and complex shapes - preferred is cover - magnetic holder.
  • Possible danger resulting from small fragments of magnets pose a threat, in case of ingestion, which becomes key in the aspect of protecting the youngest. Additionally, small elements of these products are able to 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

Pull force analysis

Breakaway strength of the magnet in ideal conditionswhat contributes to it?

The load parameter shown concerns the peak performance, recorded under laboratory conditions, namely:
  • using a sheet made of mild steel, functioning as a ideal flux conductor
  • possessing a thickness of at least 10 mm to ensure full flux closure
  • with a surface cleaned and smooth
  • with zero gap (no coatings)
  • for force applied at a right angle (pull-off, not shear)
  • at standard ambient temperature

Lifting capacity in practice – influencing factors

Holding efficiency is affected by working environment parameters, including (from priority):
  • Air gap (between the magnet and the plate), because even a microscopic distance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to varnish, rust or debris).
  • Force direction – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet exhibits significantly lower power (often approx. 20-30% of maximum force).
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Metal type – not every steel attracts identically. High carbon content weaken the attraction effect.
  • Plate texture – smooth surfaces guarantee perfect abutment, which improves field saturation. Rough surfaces weaken the grip.
  • Thermal conditions – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and in frost 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 detachment force, whereas under parallel forces the load capacity is reduced by as much as 75%. Additionally, even a small distance between the magnet’s surface and the plate lowers the lifting capacity.

Precautions when working with neodymium magnets
Immense force

Handle with care. Neodymium magnets attract from a long distance and snap with massive power, often faster than you can move away.

Phone sensors

GPS units and smartphones are extremely susceptible to magnetic fields. Direct contact with a powerful NdFeB magnet can ruin the sensors in your phone.

Protect data

Powerful magnetic fields can corrupt files on payment cards, HDDs, and storage devices. Maintain a gap of min. 10 cm.

Bodily injuries

Danger of trauma: The attraction force is so immense that it can cause hematomas, pinching, and broken bones. Protective gloves are recommended.

Risk of cracking

Despite the nickel coating, neodymium is brittle and not impact-resistant. Do not hit, as the magnet may shatter into hazardous fragments.

Demagnetization risk

Control the heat. Heating the magnet to high heat will ruin its properties and pulling force.

Product not for children

Only for adults. Tiny parts pose a choking risk, leading to serious injuries. Keep away from kids and pets.

Combustion hazard

Drilling and cutting of neodymium magnets carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Warning for heart patients

For implant holders: Strong magnetic fields disrupt medical devices. Keep at least 30 cm distance or ask another person to handle the magnets.

Allergy Warning

Certain individuals experience a hypersensitivity to nickel, which is the typical protective layer for NdFeB magnets. Frequent touching can result in a rash. We strongly advise wear protective gloves.

Danger! Learn more about hazards in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98