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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

view technical data »

0.283 ZŁ with VAT / pcs + price for transport

0.230 ZŁ net + 23% VAT / pcs

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Technical of the product - 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 simulation of the magnet - technical parameters

The following values constitute the outcome of a physical analysis. Values rely on models for the class Nd2Fe14B. Operational performance may differ from theoretical values. Please consider these calculations as a supplementary guide when designing systems.

Table 1: Static pull force (pull vs gap) - interaction chart
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
 weak grip
1 mm 2955 Gs
295.5 mT
 0.33 kg / 0.72 LBS
325.8 g / 3.2 N
 weak grip
2 mm 1672 Gs
167.2 mT
 0.10 kg / 0.23 LBS
104.4 g / 1.0 N
 weak grip
3 mm 960 Gs
96.0 mT
 0.03 kg / 0.08 LBS
34.4 g / 0.3 N
 weak grip
5 mm 372 Gs
37.2 mT
 0.01 kg / 0.01 LBS
5.2 g / 0.1 N
 weak grip
10 mm 74 Gs
7.4 mT
 0.00 kg / 0.00 LBS
0.2 g / 0.0 N
 weak grip
15 mm 25 Gs
2.5 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 weak grip
20 mm 12 Gs
1.2 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 weak grip
30 mm 4 Gs
0.4 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
Magnetic force weakens significantly with every mm of distance. Keep in mind that even the smallest gap (e.g., contamination, paint, dust) strongly reduces the pull force. Magnets operate most effectively at the point of direct contact; distance nullifies the force. Observe how quickly the load capacity plummet, when the product does not adhere flatly to the steel surface. When planning the arrangement, discard additional spacers.

Table 2: Sliding force (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
The table below presents the estimated weight limit necessary to cause the shifting of the magnet vertically against a vertical metal surface (assuming typical friction coefficient). This value varies with the separation distance between the magnet and the metal.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
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
When mounting a holder on a upright plane (e.g., a car body), it will only hold barely about 20%-30% of nominal attraction strength. Gravity as well as a weak degree of grip influence the fact that magnets slide down faster than they pop off the substrate. Planning a vertical fastening? Consider that the sliding force is much weaker than the perpendicular breakaway force. On a painted metal, the magnet will slip down under a noticeably lighter load. Application of an anti-slip coating can effectively improve the result.

Table 4: Material efficiency (substrate influence) - power losses
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
A thin metal plate is incapable of conduct the entire magnetic field, which squanders power of the holder. If you install a neodymium to a too thin substrate, the flux will pass right through and the pull force will drop sharply. To achieve 100% of this magnet's potential, you require a sufficiently solid backing of metal. The material oversaturation means that on sheet metal structures (e.g., car bodies), the product holds weaker. We suggest choosing the steel thickness based on the following data.

Table 5: Working in heat (material behavior) - thermal limit
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
Classic neodymiums lose power above the temperature limit. Protect against heat – high temperature can irreversibly destroy this product. With every degree above norm, the magnet's capacity momentarily drops. Avoid using this product close to ovens higher than its safe range. Exceeding the critical threshold will result in permanent loss of magnetism.
*Important note: Heat tolerance depends not only on the material grade, but also on the magnet's shape. Thin magnets (low Pc) are more susceptible to demagnetization under lower heat stress compared to rod magnets. Warning indicator in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (attraction) - 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
Two strong neodymiums attract each other from a much further distance than a magnet and sheet combination. The connection of magnet-to-magnet generates a stronger field and a larger range of performance. Want to build a strong closure? Apply two magnets instead of one magnet and a striker plate. Be careful that when attracting two neodymiums, the pinch force is massive. The levitation is marginally weaker than the attraction, but still impressive.
*Field value between like poles reaches ~0 Gs at the midpoint of the gap (caused by magnetic field nullification).
Important: Calculations refer to shear force of a pair of identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Protective zones (implants) - warnings
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
Timepiece 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
Powerful magnet radiation is a serious hazard to IT equipment as well as pacemakers. These neodymiums generate a field that destroys function of digital equipment. Remember: the invisible magnetic field acts through matter and glass. Increased vigilance must be taken by people with cochlear implants and drug dispensers. Also at risk are: automatic timepieces, remotes, membranes, and screens. Do not bring the product near payment cards, HDD media, or precise measuring instruments.

Table 8: Impact energy (cracking risk) - collision effects
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
NdFeB products are prone to chipping – a violent impact against metal can result in shattering. Pay attention to connection velocity – a neodymium left loose speeds with massive force. Striking energy can trigger coating fragments or painful pinches to skin. Hold the magnet firmly during bringing near metal so it doesn't slam with momentum against the metal. A contact at a velocity of dozens of km/h ends with a crack of the neodymium. Wear eye protection when working with powerful specimens.

Table 9: Coating parameters (durability)
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)
Neodymium magnets are highly susceptible to corrosion without proper protection. Note the thickness of the protective layer.

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)
Flux value emitted by the magnet pole. Key data in coil applications and motors. The Pc coefficient defines the working geometry.

Table 11: Submerged application
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.
Contrary to myths, water does not block the magnetic field. However, remember the water resistance when pulling the rope quickly.
1. Wall mount (shear)

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

2. Efficiency vs thickness

*Thin metal sheet (e.g. 0.5mm PC case) severely weakens 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) = 0.66

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: 010087-2026
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The presented product is a very strong rod magnet, composed of advanced NdFeB material, which, with dimensions of Ø5x3 mm, guarantees optimal power. This specific item is characterized by a tolerance of ±0.1mm and industrial build quality, making it an ideal solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 0.84 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.
This model is perfect for building electric motors, advanced sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the high power 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 tolerance of ±0.1mm, the recommended way 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, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need even stronger magnets in the same volume (Ø5x3), 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 Ø5x3 mm, which, at a weight of 0.44 g, makes it an element with high magnetic energy density. The value of 8.25 N means that the magnet is capable of holding a weight many times exceeding its own mass of 0.44 g. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 3 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.

Strengths as well as weaknesses of neodymium magnets.

Pros

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • They do not lose magnetism, even over approximately ten years – the drop in strength is only ~1% (theoretically),
  • They retain their magnetic properties even under external field action,
  • In other words, due to the metallic surface of silver, the element gains a professional look,
  • They show high magnetic induction at the operating surface, which affects their effectiveness,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
  • Possibility of exact shaping as well as adapting to precise conditions,
  • Universal use in future technologies – they are commonly used in magnetic memories, motor assemblies, medical equipment, as well as technologically advanced constructions.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Weaknesses

Disadvantages of neodymium magnets:
  • They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects the magnet but also improves its resistance to damage
  • NdFeB magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in creating threads and complex forms in magnets, we propose using casing - magnetic holder.
  • Health risk resulting from small fragments of magnets are risky, if swallowed, which is particularly important in the aspect of protecting the youngest. Furthermore, small components of these devices are able to be problematic in diagnostics medical after entering the body.
  • Due to complex production process, their price exceeds standard values,

Holding force characteristics

Breakaway strength of the magnet in ideal conditions – what it depends on?

Breakaway force was defined for ideal contact conditions, taking into account:
  • on a block made of structural steel, optimally conducting the magnetic flux
  • possessing a thickness of min. 10 mm to avoid saturation
  • with an ground contact surface
  • with direct contact (without 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 is determined by many variables, presented from most significant:
  • Distance – the presence of any layer (paint, tape, gap) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
  • Load vector – highest force is reached only during perpendicular pulling. The force required to slide of the magnet along the plate is standardly many times smaller (approx. 1/5 of the lifting capacity).
  • Steel thickness – insufficiently thick steel does not close the flux, causing part of the flux to be lost into the air.
  • Steel grade – ideal substrate is pure iron steel. Hardened steels may have worse magnetic properties.
  • Plate texture – smooth surfaces guarantee perfect abutment, which improves force. Uneven metal reduce efficiency.
  • Thermal factor – 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 a perpendicular force was applied, however under shearing force the holding force is lower. In addition, even a minimal clearance between the magnet’s surface and the plate lowers the load capacity.

Safe handling of neodymium magnets
Conscious usage

Exercise caution. Neodymium magnets attract from a distance and snap with huge force, often quicker than you can move away.

Allergy Warning

Studies show that the nickel plating (standard magnet coating) is a potent allergen. If your skin reacts to metals, avoid touching magnets with bare hands or select encased magnets.

Magnetic interference

Note: rare earth magnets produce a field that disrupts sensitive sensors. Maintain a safe distance from your phone, device, and GPS.

Heat sensitivity

Control the heat. Heating the magnet above 80 degrees Celsius will destroy its properties and strength.

Electronic hazard

Equipment safety: Neodymium magnets can ruin data carriers and delicate electronics (pacemakers, medical aids, mechanical watches).

Physical harm

Risk of injury: The attraction force is so great that it can cause blood blisters, crushing, and broken bones. Protective gloves are recommended.

Combustion hazard

Dust produced during cutting of magnets is combustible. Avoid drilling into magnets unless you are an expert.

Eye protection

Neodymium magnets are ceramic materials, which means they are very brittle. Clashing of two magnets leads to them cracking into small pieces.

Warning for heart patients

Medical warning: Strong magnets can deactivate pacemakers and defibrillators. Do not approach if you have electronic implants.

Adults only

NdFeB magnets are not toys. Accidental ingestion of several magnets can lead to them connecting inside the digestive tract, which constitutes a severe health hazard and necessitates immediate surgery.

Safety First! More info about hazards in the article: Magnet Safety Guide.