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MW 7x2 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010099

GTIN/EAN: 5906301810988

5.00

Diameter Ø

7 mm [±0,1 mm]

Height

2 mm [±0,1 mm]

Weight

0.58 g

Magnetization Direction

↑ axial

Load capacity

0.99 kg / 9.76 N

Magnetic Induction

307.23 mT / 3072 Gs

Coating

[NiCuNi] Nickel

0.381 with VAT / pcs + price for transport

0.310 ZŁ net + 23% VAT / pcs

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Technical of the product - MW 7x2 / N38 - cylindrical magnet

Specification / characteristics - MW 7x2 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010099
GTIN/EAN 5906301810988
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 7 mm [±0,1 mm]
Height 2 mm [±0,1 mm]
Weight 0.58 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.99 kg / 9.76 N
Magnetic Induction ~ ? 307.23 mT / 3072 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 7x2 / 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 product - report

Presented data are the direct effect of a physical simulation. Results rely on models for the class Nd2Fe14B. Actual performance might slightly differ. Use these data as a preliminary roadmap during assembly planning.

Table 1: Static pull force (force vs gap) - interaction chart
MW 7x2 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3070 Gs
307.0 mT
0.99 kg / 2.18 LBS
990.0 g / 9.7 N
safe
1 mm 2332 Gs
233.2 mT
0.57 kg / 1.26 LBS
571.1 g / 5.6 N
safe
2 mm 1590 Gs
159.0 mT
0.27 kg / 0.59 LBS
265.5 g / 2.6 N
safe
3 mm 1044 Gs
104.4 mT
0.11 kg / 0.25 LBS
114.6 g / 1.1 N
safe
5 mm 466 Gs
46.6 mT
0.02 kg / 0.05 LBS
22.8 g / 0.2 N
safe
10 mm 100 Gs
10.0 mT
0.00 kg / 0.00 LBS
1.1 g / 0.0 N
safe
15 mm 35 Gs
3.5 mT
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
safe
20 mm 16 Gs
1.6 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe
30 mm 5 Gs
0.5 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 load (wall)
MW 7x2 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.20 kg / 0.44 LBS
198.0 g / 1.9 N
1 mm Stal (~0.2) 0.11 kg / 0.25 LBS
114.0 g / 1.1 N
2 mm Stal (~0.2) 0.05 kg / 0.12 LBS
54.0 g / 0.5 N
3 mm Stal (~0.2) 0.02 kg / 0.05 LBS
22.0 g / 0.2 N
5 mm Stal (~0.2) 0.00 kg / 0.01 LBS
4.0 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 (sliding) - behavior on slippery surfaces
MW 7x2 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.30 kg / 0.65 LBS
297.0 g / 2.9 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.20 kg / 0.44 LBS
198.0 g / 1.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.10 kg / 0.22 LBS
99.0 g / 1.0 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.50 kg / 1.09 LBS
495.0 g / 4.9 N

Table 4: Steel thickness (saturation) - power losses
MW 7x2 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.10 kg / 0.22 LBS
99.0 g / 1.0 N
1 mm
25%
0.25 kg / 0.55 LBS
247.5 g / 2.4 N
2 mm
50%
0.50 kg / 1.09 LBS
495.0 g / 4.9 N
3 mm
75%
0.74 kg / 1.64 LBS
742.5 g / 7.3 N
5 mm
100%
0.99 kg / 2.18 LBS
990.0 g / 9.7 N
10 mm
100%
0.99 kg / 2.18 LBS
990.0 g / 9.7 N
11 mm
100%
0.99 kg / 2.18 LBS
990.0 g / 9.7 N
12 mm
100%
0.99 kg / 2.18 LBS
990.0 g / 9.7 N

Table 5: Thermal resistance (material behavior) - resistance threshold
MW 7x2 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.99 kg / 2.18 LBS
990.0 g / 9.7 N
OK
40 °C -2.2% 0.97 kg / 2.13 LBS
968.2 g / 9.5 N
OK
60 °C -4.4% 0.95 kg / 2.09 LBS
946.4 g / 9.3 N
80 °C -6.6% 0.92 kg / 2.04 LBS
924.7 g / 9.1 N
100 °C -28.8% 0.70 kg / 1.55 LBS
704.9 g / 6.9 N

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 7x2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 2.24 kg / 4.93 LBS
4 653 Gs
0.34 kg / 0.74 LBS
335 g / 3.3 N
N/A
1 mm 1.76 kg / 3.89 LBS
5 454 Gs
0.26 kg / 0.58 LBS
265 g / 2.6 N
1.59 kg / 3.50 LBS
~0 Gs
2 mm 1.29 kg / 2.84 LBS
4 663 Gs
0.19 kg / 0.43 LBS
193 g / 1.9 N
1.16 kg / 2.56 LBS
~0 Gs
3 mm 0.89 kg / 1.97 LBS
3 884 Gs
0.13 kg / 0.30 LBS
134 g / 1.3 N
0.81 kg / 1.77 LBS
~0 Gs
5 mm 0.40 kg / 0.87 LBS
2 581 Gs
0.06 kg / 0.13 LBS
59 g / 0.6 N
0.36 kg / 0.78 LBS
~0 Gs
10 mm 0.05 kg / 0.11 LBS
932 Gs
0.01 kg / 0.02 LBS
8 g / 0.1 N
0.05 kg / 0.10 LBS
~0 Gs
20 mm 0.00 kg / 0.01 LBS
200 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
17 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
10 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
6 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
4 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
3 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) (electronics) - precautionary measures
MW 7x2 / 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
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) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 0.5 cm

Table 8: Dynamics (cracking risk) - warning
MW 7x2 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 41.69 km/h
(11.58 m/s)
0.04 J
30 mm 72.17 km/h
(20.05 m/s)
0.12 J
50 mm 93.17 km/h
(25.88 m/s)
0.19 J
100 mm 131.76 km/h
(36.60 m/s)
0.39 J

Table 9: Coating parameters (durability)
MW 7x2 / 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 7x2 / N38

Parameter Value SI Unit / Description
Magnetic Flux 1 284 Mx 12.8 µWb
Pc Coefficient 0.39 Low (Flat)

Table 11: Submerged application
MW 7x2 / N38

Environment Effective steel pull Effect
Air (land) 0.99 kg Standard
Water (riverbed) 1.13 kg
(+0.14 kg buoyancy gain)
+14.5%
Corrosion warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Sliding resistance

*Warning: On a vertical surface, the magnet retains only ~20% of its nominal pull.

2. Plate thickness effect

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

3. Heat tolerance

*For standard magnets, the max working temp is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.39

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
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%
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: 010099-2026
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Force (pull)

Magnetic Field

Other deals

This product is an incredibly powerful cylinder magnet, composed of modern NdFeB material, which, with dimensions of Ø7x2 mm, guarantees optimal power. The MW 7x2 / N38 model boasts high dimensional repeatability and professional build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with significant force (approx. 0.99 kg), this product is available off-the-shelf from our European logistics center, ensuring lightning-fast order fulfillment. Furthermore, its Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
It successfully proves itself in modeling, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the pull force of 9.76 N with a weight of only 0.58 g, this rod is indispensable in miniature devices and wherever low weight is crucial.
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., 7.1 mm) using epoxy glues. To ensure long-term durability in automation, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most frequently chosen standard for industrial neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø7x2), 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 Ø7x2 mm, which, at a weight of 0.58 g, makes it an element with impressive magnetic energy density. The value of 9.76 N means that the magnet is capable of holding a weight many times exceeding its own mass of 0.58 g. The product has a [NiCuNi] coating, which protects the surface against oxidation, 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 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 through the diameter if your project requires it.

Advantages and disadvantages of neodymium magnets.

Benefits

Apart from their consistent power, neodymium magnets have these key benefits:
  • Their magnetic field is maintained, and after approximately 10 years it drops only by ~1% (according to research),
  • Neodymium magnets are characterized by exceptionally resistant to loss of magnetic properties caused by external interference,
  • Thanks to the reflective finish, the coating of nickel, gold, or silver gives an professional appearance,
  • They show high magnetic induction at the operating surface, which improves attraction properties,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Due to the possibility of precise forming and adaptation to unique needs, magnetic components can be manufactured in a broad palette of geometric configurations, which expands the range of possible applications,
  • Key role in future technologies – they are used in mass storage devices, motor assemblies, medical devices, also industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which allows their use in small systems

Weaknesses

Cons of neodymium magnets: application proposals
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a special holder, which not only secures them against impacts but also raises their durability
  • When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their power 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
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
  • Due to limitations in producing threads and complicated forms in magnets, we recommend using a housing - magnetic mechanism.
  • Possible danger related to microscopic parts of magnets are risky, when accidentally swallowed, which becomes key in the context of child safety. It is also worth noting that tiny parts of these products are able to disrupt the diagnostic process medical in case of swallowing.
  • Due to expensive raw materials, their price exceeds standard values,

Lifting parameters

Maximum lifting capacity of the magnetwhat affects it?

Breakaway force was determined for the most favorable conditions, assuming:
  • using a plate made of high-permeability steel, serving as a circuit closing element
  • whose transverse dimension reaches at least 10 mm
  • with an ground contact surface
  • without any air gap between the magnet and steel
  • under vertical force direction (90-degree angle)
  • in stable room temperature

Practical aspects of lifting capacity – factors

In practice, the actual lifting capacity is determined by several key aspects, ranked from the most important:
  • Gap (betwixt the magnet and the plate), since even a microscopic clearance (e.g. 0.5 mm) can cause a drastic drop in lifting capacity by up to 50% (this also applies to paint, rust or debris).
  • Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Substrate thickness – for full efficiency, the steel must be adequately massive. Thin sheet restricts the attraction force (the magnet "punches through" it).
  • Steel grade – the best choice is high-permeability steel. Cast iron may have worse magnetic properties.
  • Surface structure – the smoother and more polished the surface, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
  • Thermal conditions – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and in frost gain strength (up to a certain limit).

Lifting capacity was determined by applying a steel plate with a smooth surface of optimal thickness (min. 20 mm), under vertically applied force, whereas under attempts to slide the magnet the lifting capacity is smaller. In addition, even a small distance between the magnet’s surface and the plate lowers the holding force.

Safe handling of neodymium magnets
Impact on smartphones

An intense magnetic field disrupts the functioning of compasses in phones and GPS navigation. Maintain magnets close to a smartphone to prevent breaking the sensors.

Keep away from computers

Equipment safety: Strong magnets can ruin data carriers and sensitive devices (pacemakers, medical aids, timepieces).

Heat warning

Keep cool. Neodymium magnets are susceptible to temperature. If you need operation above 80°C, look for special high-temperature series (H, SH, UH).

Implant safety

Medical warning: Strong magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.

Allergy Warning

Some people suffer from a contact allergy to nickel, which is the standard coating for NdFeB magnets. Extended handling might lead to a rash. We suggest use safety gloves.

Keep away from children

Only for adults. Small elements can be swallowed, leading to serious injuries. Keep away from children and animals.

Do not underestimate power

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

Eye protection

Watch out for shards. Magnets can fracture upon violent connection, ejecting sharp fragments into the air. Wear goggles.

Combustion hazard

Machining of NdFeB material poses a fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Crushing risk

Risk of injury: The pulling power is so great that it can cause hematomas, pinching, and even bone fractures. Protective gloves are recommended.

Safety First! Details about hazards in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98