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MW 5x2 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010085

GTIN/EAN: 5906301810841

5.00

Diameter Ø

5 mm [±0,1 mm]

Height

2 mm [±0,1 mm]

Weight

0.29 g

Magnetization Direction

↑ axial

Load capacity

0.70 kg / 6.83 N

Magnetic Induction

386.50 mT / 3865 Gs

Coating

[NiCuNi] Nickel

view technical specifications »

0.1845 ZŁ with VAT / pcs + price for transport

0.1500 ZŁ net + 23% VAT / pcs

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Technical specification - MW 5x2 / N38 - cylindrical magnet

Specification / characteristics - MW 5x2 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010085
GTIN/EAN 5906301810841
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 2 mm [±0,1 mm]
Weight 0.29 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.70 kg / 6.83 N
Magnetic Induction ~ ? 386.50 mT / 3865 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 5x2 / 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 simulation of the magnet - report

The following values constitute the direct effect of a mathematical calculation. Values rely on algorithms for the class Nd2Fe14B. Real-world performance might slightly differ. Please consider these data as a supplementary guide when designing systems.

Table 1: Static force (force vs gap) - characteristics
MW 5x2 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3860 Gs
386.0 mT
 0.70 kg / 1.54 LBS
700.0 g / 6.9 N
 safe
1 mm 2460 Gs
246.0 mT
 0.28 kg / 0.63 LBS
284.4 g / 2.8 N
 safe
2 mm 1384 Gs
138.4 mT
 0.09 kg / 0.20 LBS
90.0 g / 0.9 N
 safe
3 mm 782 Gs
78.2 mT
 0.03 kg / 0.06 LBS
28.8 g / 0.3 N
 safe
5 mm 293 Gs
29.3 mT
 0.00 kg / 0.01 LBS
4.0 g / 0.0 N
 safe
10 mm 55 Gs
5.5 mT
 0.00 kg / 0.00 LBS
0.1 g / 0.0 N
 safe
15 mm 18 Gs
1.8 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 safe
20 mm 8 Gs
0.8 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 safe
30 mm 3 Gs
0.3 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
Magnetic force drops sharply with every mm of distance. Keep in mind that even a microscopic distance (e.g., dirt, paint, rust) strongly weakens the grip. Neodymiums work most effectively during direct contact; gap drastically cuts the force. Analyze how flashily the pull force drop, when the magnet does not adhere flatly to the metal substrate. When planning the arrangement, avoid unnecessary gaps.

Table 2: Shear hold (vertical surface)
MW 5x2 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.14 kg / 0.31 LBS
140.0 g / 1.4 N
1 mm Stal (~0.2) 0.06 kg / 0.12 LBS
56.0 g / 0.5 N
2 mm Stal (~0.2) 0.02 kg / 0.04 LBS
18.0 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
0.0 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 following data calculates the estimated weight limit necessary to initiate the shifting of the magnet down against a vertical metal surface (considering typical friction coefficient). This parameter is a function of the gap size between the magnet and the metal.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 5x2 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.21 kg / 0.46 LBS
210.0 g / 2.1 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.14 kg / 0.31 LBS
140.0 g / 1.4 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.07 kg / 0.15 LBS
70.0 g / 0.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.35 kg / 0.77 LBS
350.0 g / 3.4 N
When mounting a element on a upright surface (e.g., a board), it you can count on only approx. 1/5 of nominal attraction strength. Gravity and a weak degree of grip mean that magnets slide down easier than they pop off the substrate. Planning a hanger? Consider that the shear force is significantly lower than the maximum static pull force. On a painted metal, the holder will slip down under a noticeably lighter weight. Utilizing a rubberized layer can significantly raise the stability.

Table 4: Material efficiency (substrate influence) - power losses
MW 5x2 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.07 kg / 0.15 LBS
70.0 g / 0.7 N
1 mm
25%
 0.18 kg / 0.39 LBS
175.0 g / 1.7 N
2 mm
50%
 0.35 kg / 0.77 LBS
350.0 g / 3.4 N
3 mm
75%
 0.52 kg / 1.16 LBS
525.0 g / 5.2 N
5 mm
100%
 0.70 kg / 1.54 LBS
700.0 g / 6.9 N
10 mm
100%
 0.70 kg / 1.54 LBS
700.0 g / 6.9 N
11 mm
100%
 0.70 kg / 1.54 LBS
700.0 g / 6.9 N
12 mm
100%
 0.70 kg / 1.54 LBS
700.0 g / 6.9 N
A thin metal plate is incapable of take in the full magnetic flux, which wastes potential of the magnet. If you attach a powerful product to a too thin substrate, the field will pass right through and the holding will be smaller. To achieve 100% of this magnet's potential, you require a sufficiently solid backing of steel. The saturation effect causes that on sheet metal structures (e.g., car bodies), the product holds weaker. We recommend selecting the steel cross-section based on the following data.

Table 5: Thermal stability (stability) - thermal limit
MW 5x2 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.70 kg / 1.54 LBS
700.0 g / 6.9 N
 OK
40 °C -2.2% 0.68 kg / 1.51 LBS
684.6 g / 6.7 N
 OK
60 °C -4.4% 0.67 kg / 1.48 LBS
669.2 g / 6.6 N
80 °C -6.6% 0.65 kg / 1.44 LBS
653.8 g / 6.4 N
100 °C -28.8% 0.50 kg / 1.10 LBS
498.4 g / 4.9 N
Classic neodymiums irreversibly lose strength past the thermal threshold. Watch out for overheating – excessive heat can irreversibly damage this product. With every degree above norm, the magnet's force temporarily decreases. Do not use this product close to ovens higher than its operating temperature limit. Ignoring the limit will lead to irreversible degradation of magnetism.
*Technical advisory: Heat tolerance depends not only on the material grade, but also on the magnet's shape. Flat magnets (low Pc) may lose charge permanently under lower heat stress than long magnets. The danger warning in the table indicates permanent field degradation for this specific geometry.

Table 6: Two magnets (attraction) - field range
MW 5x2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 1.80 kg / 3.98 LBS
5 236 Gs
0.27 kg / 0.60 LBS
271 g / 2.7 N
 N/A
1 mm 1.21 kg / 2.68 LBS
6 336 Gs
0.18 kg / 0.40 LBS
182 g / 1.8 N
 1.09 kg / 2.41 LBS
~0 Gs
2 mm 0.73 kg / 1.62 LBS
4 921 Gs
0.11 kg / 0.24 LBS
110 g / 1.1 N
 0.66 kg / 1.45 LBS
~0 Gs
3 mm 0.42 kg / 0.92 LBS
3 711 Gs
0.06 kg / 0.14 LBS
62 g / 0.6 N
 0.37 kg / 0.83 LBS
~0 Gs
5 mm 0.13 kg / 0.29 LBS
2 071 Gs
0.02 kg / 0.04 LBS
19 g / 0.2 N
 0.12 kg / 0.26 LBS
~0 Gs
10 mm 0.01 kg / 0.02 LBS
587 Gs
0.00 kg / 0.00 LBS
2 g / 0.0 N
 0.01 kg / 0.02 LBS
~0 Gs
20 mm 0.00 kg / 0.00 LBS
110 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
9 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
5 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
3 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
2 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
1 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
Two magnetic products interact from a significantly greater distance than a neodymium and metal setup. The connection of two magnets generates a stronger field and a further horizon of performance. Designing a solid fastener? Apply two magnets instead of one magnet and a striker plate. Remember that when bringing together two magnets, the collision energy is extreme. The levitation is a bit weaker than the attraction, but still large.
*Field value between like poles drops to ~0 Gs in the exact middle between the magnets (due to field cancellation).
* Estimates apply to shear force of a pair of same neodymium magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Safety (HSE) (implants) - precautionary measures
MW 5x2 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 2.5 cm
Hearing aid 10 Gs (1.0 mT) 2.0 cm
Mechanical watch 20 Gs (2.0 mT) 1.5 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) 0.5 cm
HDD hard drive 600 Gs (60.0 mT) 0.5 cm
Powerful magnet radiation poses a real danger to electronic devices and pacemakers. These neodymiums produce a flux that destroys function of sensitive medical devices. Notice: the invisible magnetic field passes through tissues and glass. Increased vigilance must be exercised by people with hearing aids and insulin pumps. The risk also applies to: automatic timepieces, car keys, speakers, and displays. Do not bring the product near payment cards, HDD media, or sensitive navigation tools.

Table 8: Dynamics (kinetic energy) - warning
MW 5x2 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 49.55 km/h
(13.77 m/s)
 0.03 J
30 mm 85.82 km/h
(23.84 m/s)
 0.08 J
50 mm 110.79 km/h
(30.78 m/s)
 0.14 J
100 mm 156.69 km/h
(43.52 m/s)
 0.27 J
Neodymium magnets are very brittle – a strong collision with metal can result in shattering. Control the attraction moment – a neodymium left loose turns into a projectile. Kinetic force can destroy the magnet or dangerous crushing to skin. Hold the magnet firmly during bringing near metal so it doesn't slam with momentum against the metal. A collision at high speed ends with a crack of the neodymium. Wear safety glasses when handling with large magnets.

Table 9: Anti-corrosion coating durability
MW 5x2 / 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 (Pc)
MW 5x2 / N38

Parameter Value SI Unit / Description
Magnetic Flux 785 Mx 7.9 µWb
Pc Coefficient 0.50 Low (Flat)
Total magnetic flux passing through the pole surface. Essential parameter for generator designers and motors. Pc value defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MW 5x2 / N38

Environment Effective steel pull Effect
Air (land) 0.70 kg Standard
Water (riverbed) 0.80 kg
(+0.10 kg buoyancy gain)
+14.5%
Corrosion warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
Water displaces steel, making heavy objects slightly lighter. However, remember the water resistance when pulling the rope quickly.
1. Shear force

*Warning: On a vertical surface, the magnet retains just approx. 20-30% of its perpendicular strength.

2. Efficiency vs thickness

*Thin metal sheet (e.g. computer case) significantly limits the holding force.

3. Heat tolerance

*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) = 0.50

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
Chemical composition
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%
Sustainability
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: 010085-2026
Magnet Unit Converter
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The offered product is a very strong cylinder magnet, manufactured from modern NdFeB material, which, with dimensions of Ø5x2 mm, guarantees maximum efficiency. This specific item is characterized by an accuracy of ±0.1mm and professional build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 0.70 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating secures it against corrosion in typical 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 6.83 N with a weight of only 0.29 g, this rod is indispensable in miniature devices and wherever low weight is crucial.
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 professional component. To ensure stability in automation, anaerobic resins are used, which are safe for nickel 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 the strongest magnets in the same volume (Ø5x2), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.
This model is characterized by dimensions Ø5x2 mm, which, at a weight of 0.29 g, makes it an element with impressive magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 0.70 kg (force ~6.83 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.
This rod magnet is magnetized axially (along the height of 2 mm), which means that the N and S poles are located on the flat, circular surfaces. 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.

Strengths as well as weaknesses of rare earth magnets.

Pros

Apart from their strong magnetic energy, neodymium magnets have these key benefits:
  • They have unchanged lifting capacity, and over more than 10 years their attraction force decreases symbolically – ~1% (according to theory),
  • Neodymium magnets are characterized by extremely resistant to demagnetization caused by external field sources,
  • In other words, due to the metallic finish of silver, the element is aesthetically pleasing,
  • They are known for high magnetic induction at the operating surface, making them more effective,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Thanks to freedom in constructing and the capacity to customize to client solutions,
  • Versatile presence in electronics industry – they are commonly used in mass storage devices, electromotive mechanisms, advanced medical instruments, and industrial machines.
  • Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Disadvantages

Characteristics of disadvantages of neodymium magnets and proposals for their use:
  • To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Limited possibility of producing nuts in the magnet and complex shapes - recommended is a housing - magnetic holder.
  • Health risk resulting from small fragments of magnets are risky, if swallowed, which gains importance in the context of child safety. Furthermore, small components of these magnets can disrupt the diagnostic process medical in case of swallowing.
  • With budget limitations the cost of neodymium magnets is economically unviable,

Pull force analysis

Best holding force of the magnet in ideal parameters – what it depends on?

The specified lifting capacity refers to the maximum value, obtained under laboratory conditions, specifically:
  • on a base made of mild steel, effectively closing the magnetic flux
  • with a thickness no less than 10 mm
  • characterized by lack of roughness
  • with total lack of distance (no paint)
  • under axial application of breakaway force (90-degree angle)
  • at ambient temperature room level

Lifting capacity in real conditions – factors

It is worth knowing that the working load may be lower influenced by elements below, starting with the most relevant:
  • Distance (betwixt the magnet and the plate), because even a very small clearance (e.g. 0.5 mm) results in a reduction in lifting capacity by up to 50% (this also applies to varnish, corrosion or debris).
  • 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 maximum value.
  • Plate thickness – insufficiently thick plate does not close the flux, causing part of the flux to be wasted to the other side.
  • Material type – the best choice is high-permeability steel. Stainless steels may attract less.
  • Smoothness – full contact is obtained only on polished steel. Rough texture create air cushions, weakening the magnet.
  • Operating temperature – neodymium magnets have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under attempts to slide the magnet the load capacity is reduced by as much as 75%. Moreover, even a small distance between the magnet’s surface and the plate decreases the load capacity.

Warnings
Do not drill into magnets

Machining of neodymium magnets poses a fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Conscious usage

Handle magnets consciously. Their immense force can shock even professionals. Plan your moves and respect their power.

Electronic hazard

Data protection: Strong magnets can ruin data carriers and delicate electronics (heart implants, medical aids, timepieces).

Danger to pacemakers

Warning for patients: Powerful magnets disrupt medical devices. Keep minimum 30 cm distance or request help to handle the magnets.

GPS Danger

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

Fragile material

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

Allergic reactions

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If skin irritation happens, cease handling magnets and use protective gear.

This is not a toy

Absolutely store magnets out of reach of children. Ingestion danger is high, and the consequences of magnets clamping inside the body are very dangerous.

Bone fractures

Large magnets can smash fingers in a fraction of a second. Never put your hand betwixt two strong magnets.

Power loss in heat

Avoid heat. NdFeB magnets are susceptible to heat. If you need operation above 80°C, inquire about HT versions (H, SH, UH).

Security! Want to know more? Read our article: Are neodymium magnets dangerous?