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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 of the product - 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

Technical analysis of the magnet - report

Presented values constitute the outcome of a engineering calculation. Results were calculated on algorithms for the class Nd2Fe14B. Real-world conditions might slightly differ from theoretical values. Please consider these calculations as a reference point during assembly planning.

Table 1: Static force (force 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 lbs
790.0 g / 7.7 N
weak grip
1 mm 3420 Gs
342.0 mT
0.30 kg / 0.67 lbs
303.0 g / 3.0 N
weak grip
2 mm 1966 Gs
196.6 mT
0.10 kg / 0.22 lbs
100.1 g / 1.0 N
weak grip
3 mm 1155 Gs
115.5 mT
0.03 kg / 0.08 lbs
34.5 g / 0.3 N
weak grip
5 mm 469 Gs
46.9 mT
0.01 kg / 0.01 lbs
5.7 g / 0.1 N
weak grip
10 mm 101 Gs
10.1 mT
0.00 kg / 0.00 lbs
0.3 g / 0.0 N
weak grip
15 mm 36 Gs
3.6 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip
20 mm 17 Gs
1.7 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip
30 mm 6 Gs
0.6 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip
50 mm 1 Gs
0.1 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip

Table 2: Sliding hold (wall)
MW 5x5 / N38

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

Table 3: Vertical assembly (shearing) - vertical pull
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 lbs
237.0 g / 2.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.16 kg / 0.35 lbs
158.0 g / 1.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.08 kg / 0.17 lbs
79.0 g / 0.8 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.40 kg / 0.87 lbs
395.0 g / 3.9 N

Table 4: Material efficiency (substrate influence) - power losses
MW 5x5 / N38

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

Table 5: Thermal resistance (material behavior) - 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 lbs
790.0 g / 7.7 N
OK
40 °C -2.2% 0.77 kg / 1.70 lbs
772.6 g / 7.6 N
OK
60 °C -4.4% 0.76 kg / 1.67 lbs
755.2 g / 7.4 N
OK
80 °C -6.6% 0.74 kg / 1.63 lbs
737.9 g / 7.2 N
100 °C -28.8% 0.56 kg / 1.24 lbs
562.5 g / 5.5 N

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 5x5 / N38

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

Table 7: Protective zones (electronics) - precautionary measures
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: Dynamics (cracking risk) - collision effects
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 (Flux)
MW 5x5 / N38

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

Table 11: Hydrostatics and buoyancy
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: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Wall mount (shear)

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

2. Steel thickness impact

*Thin metal sheet (e.g. 0.5mm PC case) drastically limits the holding force.

3. Thermal stability

*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) = 0.89

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: 010503-2026
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This product is a very strong cylinder magnet, composed of durable NdFeB material, which, with dimensions of Ø5x5 mm, guarantees the highest energy density. The MW 5x5 / N38 model is characterized by high dimensional repeatability and professional build quality, making it an ideal 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. Furthermore, its Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
It successfully proves itself in modeling, advanced robotics, 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 rod is indispensable in electronics and wherever every gram matters.
Since our magnets have a tolerance of ±0.1mm, the best method is to glue them into holes with a slightly larger diameter (e.g., 5.1 mm) using epoxy glues. To ensure long-term durability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Magnets NdFeB grade N38 are suitable 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 (Ø5x5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.
This model is characterized by dimensions Ø5x5 mm, which, at a weight of 0.74 g, makes it an element with impressive magnetic energy density. 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 external factors, giving it an aesthetic, silvery shine.
This rod magnet 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 through the diameter if your project requires it.

Advantages as well as disadvantages of neodymium magnets.

Pros

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (in laboratory conditions),
  • They retain their magnetic properties even under external field action,
  • By applying a reflective coating of silver, the element acquires an professional look,
  • Magnets are characterized by huge magnetic induction on the active area,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for operation at temperatures approaching 230°C and above...
  • Considering the option of free forming and adaptation to individualized solutions, magnetic components can be manufactured in a variety of geometric configurations, which increases their versatility,
  • Wide application in advanced technology sectors – they find application in hard drives, electric drive systems, precision medical tools, and other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which makes them useful in small systems

Cons

Disadvantages of NdFeB magnets:
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only protects the magnet but also improves its resistance to damage
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
  • Limited possibility of creating nuts in the magnet and complex forms - preferred is casing - magnet mounting.
  • Health risk to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the aspect of protecting the youngest. Additionally, small components of these devices are able to complicate diagnosis medical after entering the body.
  • With mass production the cost of neodymium magnets is economically unviable,

Holding force characteristics

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

Information about lifting capacity is the result of a measurement for ideal contact conditions, taking into account:
  • using a base made of mild steel, serving as a magnetic yoke
  • whose transverse dimension is min. 10 mm
  • with a plane free of scratches
  • with total lack of distance (no paint)
  • under axial force direction (90-degree angle)
  • in stable room temperature

Determinants of practical lifting force of a magnet

During everyday use, the actual holding force depends on many variables, listed from the most important:
  • Gap (between the magnet and the metal), as even a microscopic clearance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to varnish, corrosion or dirt).
  • Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
  • Metal type – different alloys reacts the same. High carbon content worsen the interaction with the magnet.
  • Base smoothness – the smoother and more polished the surface, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
  • Temperature – heating the magnet causes a temporary drop of force. Check the maximum operating temperature for a given model.

Lifting capacity was determined by applying a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, in contrast under shearing force the lifting capacity is smaller. In addition, even a small distance between the magnet and the plate lowers the load capacity.

Safe handling of neodymium magnets
GPS and phone interference

A strong magnetic field disrupts the operation of magnetometers in smartphones and GPS navigation. Maintain magnets near a device to prevent damaging the sensors.

Handling rules

Before starting, check safety instructions. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.

Material brittleness

Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Do not hit, as the magnet may shatter into hazardous fragments.

Allergic reactions

It is widely known that nickel (the usual finish) is a strong allergen. If you have an allergy, refrain from touching magnets with bare hands and choose versions in plastic housing.

Health Danger

People with a pacemaker must maintain an safe separation from magnets. The magnetism can disrupt the operation of the life-saving device.

No play value

Strictly keep magnets away from children. Risk of swallowing is high, and the effects of magnets clamping inside the body are fatal.

Keep away from computers

Do not bring magnets near a purse, laptop, or TV. The magnetism can destroy these devices and wipe information from cards.

Pinching danger

Danger of trauma: The pulling power is so immense that it can cause blood blisters, crushing, and broken bones. Protective gloves are recommended.

Power loss in heat

Regular neodymium magnets (grade N) undergo demagnetization when the temperature exceeds 80°C. This process is irreversible.

Fire warning

Mechanical processing of neodymium magnets carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Attention! Learn more about risks in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98