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MW 5x3 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010087

GTIN/EAN: 5906301810865

5.00

Diameter Ø

5 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

0.44 g

Magnetization Direction

↑ axial

Load capacity

0.84 kg / 8.25 N

Magnetic Induction

475.16 mT / 4752 Gs

Coating

[NiCuNi] Nickel

0.283 with VAT / pcs + price for transport

0.230 ZŁ net + 23% VAT / pcs

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Technical parameters - MW 5x3 / N38 - cylindrical magnet

Specification / characteristics - MW 5x3 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010087
GTIN/EAN 5906301810865
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 3 mm [±0,1 mm]
Weight 0.44 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.84 kg / 8.25 N
Magnetic Induction ~ ? 475.16 mT / 4752 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 5x3 / 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 analysis of the assembly - report

The following data represent the result of a mathematical simulation. Results rely on models for the class Nd2Fe14B. Actual performance might slightly deviate from the simulation results. Please consider these calculations as a reference point when designing systems.

Table 1: Static pull force (pull vs distance) - characteristics
MW 5x3 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4745 Gs
474.5 mT
0.84 kg / 1.85 lbs
840.0 g / 8.2 N
safe
1 mm 2955 Gs
295.5 mT
0.33 kg / 0.72 lbs
325.8 g / 3.2 N
safe
2 mm 1672 Gs
167.2 mT
0.10 kg / 0.23 lbs
104.4 g / 1.0 N
safe
3 mm 960 Gs
96.0 mT
0.03 kg / 0.08 lbs
34.4 g / 0.3 N
safe
5 mm 372 Gs
37.2 mT
0.01 kg / 0.01 lbs
5.2 g / 0.1 N
safe
10 mm 74 Gs
7.4 mT
0.00 kg / 0.00 lbs
0.2 g / 0.0 N
safe
15 mm 25 Gs
2.5 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe
20 mm 12 Gs
1.2 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe
30 mm 4 Gs
0.4 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe
50 mm 1 Gs
0.1 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe

Table 2: Vertical capacity (vertical surface)
MW 5x3 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.17 kg / 0.37 lbs
168.0 g / 1.6 N
1 mm Stal (~0.2) 0.07 kg / 0.15 lbs
66.0 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: Wall mounting (shearing) - vertical pull
MW 5x3 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.25 kg / 0.56 lbs
252.0 g / 2.5 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.17 kg / 0.37 lbs
168.0 g / 1.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.08 kg / 0.19 lbs
84.0 g / 0.8 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.42 kg / 0.93 lbs
420.0 g / 4.1 N

Table 4: Material efficiency (saturation) - sheet metal selection
MW 5x3 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.08 kg / 0.19 lbs
84.0 g / 0.8 N
1 mm
25%
0.21 kg / 0.46 lbs
210.0 g / 2.1 N
2 mm
50%
0.42 kg / 0.93 lbs
420.0 g / 4.1 N
3 mm
75%
0.63 kg / 1.39 lbs
630.0 g / 6.2 N
5 mm
100%
0.84 kg / 1.85 lbs
840.0 g / 8.2 N
10 mm
100%
0.84 kg / 1.85 lbs
840.0 g / 8.2 N
11 mm
100%
0.84 kg / 1.85 lbs
840.0 g / 8.2 N
12 mm
100%
0.84 kg / 1.85 lbs
840.0 g / 8.2 N

Table 5: Thermal stability (stability) - power drop
MW 5x3 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.84 kg / 1.85 lbs
840.0 g / 8.2 N
OK
40 °C -2.2% 0.82 kg / 1.81 lbs
821.5 g / 8.1 N
OK
60 °C -4.4% 0.80 kg / 1.77 lbs
803.0 g / 7.9 N
OK
80 °C -6.6% 0.78 kg / 1.73 lbs
784.6 g / 7.7 N
100 °C -28.8% 0.60 kg / 1.32 lbs
598.1 g / 5.9 N

Table 6: Two magnets (repulsion) - forces in the system
MW 5x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 2.73 kg / 6.01 lbs
5 700 Gs
0.41 kg / 0.90 lbs
409 g / 4.0 N
N/A
1 mm 1.77 kg / 3.91 lbs
7 658 Gs
0.27 kg / 0.59 lbs
266 g / 2.6 N
1.60 kg / 3.52 lbs
~0 Gs
2 mm 1.06 kg / 2.33 lbs
5 910 Gs
0.16 kg / 0.35 lbs
159 g / 1.6 N
0.95 kg / 2.10 lbs
~0 Gs
3 mm 0.60 kg / 1.33 lbs
4 460 Gs
0.09 kg / 0.20 lbs
90 g / 0.9 N
0.54 kg / 1.19 lbs
~0 Gs
5 mm 0.19 kg / 0.42 lbs
2 520 Gs
0.03 kg / 0.06 lbs
29 g / 0.3 N
0.17 kg / 0.38 lbs
~0 Gs
10 mm 0.02 kg / 0.04 lbs
745 Gs
0.00 kg / 0.01 lbs
3 g / 0.0 N
0.02 kg / 0.03 lbs
~0 Gs
20 mm 0.00 kg / 0.00 lbs
147 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
12 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
7 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
5 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
3 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
2 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
2 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Safety (HSE) (implants) - precautionary measures
MW 5x3 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 3.0 cm
Hearing aid 10 Gs (1.0 mT) 2.5 cm
Mechanical watch 20 Gs (2.0 mT) 2.0 cm
Mobile device 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) 0.5 cm
HDD hard drive 600 Gs (60.0 mT) 0.5 cm

Table 8: Collisions (cracking risk) - warning
MW 5x3 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 44.07 km/h
(12.24 m/s)
0.03 J
30 mm 76.32 km/h
(21.20 m/s)
0.10 J
50 mm 98.53 km/h
(27.37 m/s)
0.16 J
100 mm 139.35 km/h
(38.71 m/s)
0.33 J

Table 9: Surface protection spec
MW 5x3 / 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 5x3 / N38

Parameter Value SI Unit / Description
Magnetic Flux 942 Mx 9.4 µWb
Pc Coefficient 0.66 High (Stable)

Table 11: Underwater work (magnet fishing)
MW 5x3 / N38

Environment Effective steel pull Effect
Air (land) 0.84 kg Standard
Water (riverbed) 0.96 kg
(+0.12 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. Vertical hold

*Caution: On a vertical surface, the magnet retains only approx. 20-30% of its max power.

2. Steel thickness impact

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

3. Temperature resistance

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.66

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.

Engineering data and GPSR
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: 010087-2026
Magnet Unit Converter
Pulling force

Field Strength

Check out also offers

The offered product is an extremely powerful cylinder magnet, composed of advanced NdFeB material, which, with dimensions of Ø5x3 mm, guarantees the highest energy density. This specific item features a tolerance of ±0.1mm and professional build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 0.84 kg), this product is in stock from our warehouse in Poland, ensuring rapid order fulfillment. Moreover, its Ni-Cu-Ni coating secures 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 field concentration on a small surface counts. Thanks to the pull force of 8.25 N with a weight of only 0.44 g, this rod is indispensable in miniature devices and wherever low weight is crucial.
Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 5.1 mm) using two-component epoxy glues. To ensure long-term durability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Magnets N38 are suitable for 90% 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 (Ø5x3), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 5 mm and height 3 mm. The key parameter here is the lifting capacity amounting to approximately 0.84 kg (force ~8.25 N), which, with such defined dimensions, proves the high grade of the NdFeB material. 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 5 mm. Such an arrangement is most desirable 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.

Strengths and weaknesses of rare earth magnets.

Strengths

Besides their high retention, neodymium magnets are valued for these benefits:
  • They virtually do not lose power, because even after 10 years the performance loss is only ~1% (based on calculations),
  • Neodymium magnets prove to be remarkably resistant to magnetic field loss caused by external field sources,
  • In other words, due to the metallic surface of silver, the element is aesthetically pleasing,
  • Magnets exhibit excellent magnetic induction on the working surface,
  • Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
  • Possibility of custom modeling as well as optimizing to concrete requirements,
  • Universal use in modern industrial fields – they are utilized in data components, electric motors, diagnostic systems, and multitasking production systems.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Disadvantages of neodymium magnets:
  • At strong impacts they can crack, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
  • Due to limitations in creating threads and complicated shapes in magnets, we recommend using casing - magnetic mechanism.
  • 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 small elements of these magnets are able to complicate diagnosis medical in case of swallowing.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Maximum lifting capacity of the magnetwhat it depends on?

The load parameter shown represents the peak performance, measured under ideal test conditions, meaning:
  • on a base made of mild steel, effectively closing the magnetic flux
  • possessing a massiveness of minimum 10 mm to avoid saturation
  • with an polished contact surface
  • without the slightest insulating layer between the magnet and steel
  • during pulling in a direction vertical to the mounting surface
  • at ambient temperature room level

Key elements affecting lifting force

Please note that the application force may be lower depending on elements below, in order of importance:
  • Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by veneer or unevenness) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Plate material – mild steel gives the best results. Higher carbon content reduce magnetic properties and holding force.
  • Smoothness – ideal contact is possible only on smooth steel. Any scratches and bumps create air cushions, reducing force.
  • Temperature influence – hot environment weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.

Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the lifting capacity is smaller. In addition, even a minimal clearance between the magnet’s surface and the plate decreases the holding force.

Safety rules for work with neodymium magnets
Heat sensitivity

Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will destroy its magnetic structure and pulling force.

Keep away from children

Adult use only. Small elements can be swallowed, causing severe trauma. Store out of reach of kids and pets.

Warning for heart patients

Patients with a heart stimulator should keep an absolute distance from magnets. The magnetism can interfere with the functioning of the life-saving device.

Mechanical processing

Drilling and cutting of neodymium magnets poses a fire risk. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Cards and drives

Do not bring magnets close to a wallet, computer, or screen. The magnetic field can irreversibly ruin these devices and erase data from cards.

Impact on smartphones

Be aware: neodymium magnets produce a field that confuses sensitive sensors. Maintain a safe distance from your mobile, tablet, and GPS.

Nickel allergy

Some people experience a sensitization to Ni, which is the typical protective layer for NdFeB magnets. Frequent touching might lead to a rash. We suggest wear protective gloves.

Do not underestimate power

Use magnets consciously. Their huge power can surprise even experienced users. Plan your moves and respect their power.

Risk of cracking

Beware of splinters. Magnets can explode upon uncontrolled impact, ejecting shards into the air. Eye protection is mandatory.

Finger safety

Mind your fingers. Two large magnets will snap together instantly with a force of several hundred kilograms, crushing everything in their path. Be careful!

Warning! Want to know more? Check our post: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98