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MW 5x7 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010090

GTIN/EAN: 5906301810896

5.00

Diameter Ø

5 mm [±0,1 mm]

Height

7 mm [±0,1 mm]

Weight

1.03 g

Magnetization Direction

↑ axial

Load capacity

0.67 kg / 6.60 N

Magnetic Induction

582.40 mT / 5824 Gs

Coating

[NiCuNi] Nickel

0.726 with VAT / pcs + price for transport

0.590 ZŁ net + 23% VAT / pcs

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Technical - MW 5x7 / N38 - cylindrical magnet

Specification / characteristics - MW 5x7 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010090
GTIN/EAN 5906301810896
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 7 mm [±0,1 mm]
Weight 1.03 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.67 kg / 6.60 N
Magnetic Induction ~ ? 582.40 mT / 5824 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 5x7 / 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 assembly - data

The following values are the outcome of a engineering calculation. Results rely on algorithms for the class Nd2Fe14B. Actual conditions might slightly differ from theoretical values. Use these data as a preliminary roadmap for designers.

Table 1: Static pull force (pull vs distance) - characteristics
MW 5x7 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5815 Gs
581.5 mT
0.67 kg / 1.48 lbs
670.0 g / 6.6 N
safe
1 mm 3615 Gs
361.5 mT
0.26 kg / 0.57 lbs
259.0 g / 2.5 N
safe
2 mm 2101 Gs
210.1 mT
0.09 kg / 0.19 lbs
87.4 g / 0.9 N
safe
3 mm 1252 Gs
125.2 mT
0.03 kg / 0.07 lbs
31.1 g / 0.3 N
safe
5 mm 524 Gs
52.4 mT
0.01 kg / 0.01 lbs
5.4 g / 0.1 N
safe
10 mm 119 Gs
11.9 mT
0.00 kg / 0.00 lbs
0.3 g / 0.0 N
safe
15 mm 45 Gs
4.5 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe
20 mm 21 Gs
2.1 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe
30 mm 7 Gs
0.7 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe
50 mm 2 Gs
0.2 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe

Table 2: Vertical capacity (vertical surface)
MW 5x7 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.13 kg / 0.30 lbs
134.0 g / 1.3 N
1 mm Stal (~0.2) 0.05 kg / 0.11 lbs
52.0 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
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) - behavior on slippery surfaces
MW 5x7 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.20 kg / 0.44 lbs
201.0 g / 2.0 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.13 kg / 0.30 lbs
134.0 g / 1.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.07 kg / 0.15 lbs
67.0 g / 0.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.34 kg / 0.74 lbs
335.0 g / 3.3 N

Table 4: Material efficiency (saturation) - power losses
MW 5x7 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.07 kg / 0.15 lbs
67.0 g / 0.7 N
1 mm
25%
0.17 kg / 0.37 lbs
167.5 g / 1.6 N
2 mm
50%
0.34 kg / 0.74 lbs
335.0 g / 3.3 N
3 mm
75%
0.50 kg / 1.11 lbs
502.5 g / 4.9 N
5 mm
100%
0.67 kg / 1.48 lbs
670.0 g / 6.6 N
10 mm
100%
0.67 kg / 1.48 lbs
670.0 g / 6.6 N
11 mm
100%
0.67 kg / 1.48 lbs
670.0 g / 6.6 N
12 mm
100%
0.67 kg / 1.48 lbs
670.0 g / 6.6 N

Table 5: Working in heat (stability) - thermal limit
MW 5x7 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.67 kg / 1.48 lbs
670.0 g / 6.6 N
OK
40 °C -2.2% 0.66 kg / 1.44 lbs
655.3 g / 6.4 N
OK
60 °C -4.4% 0.64 kg / 1.41 lbs
640.5 g / 6.3 N
OK
80 °C -6.6% 0.63 kg / 1.38 lbs
625.8 g / 6.1 N
100 °C -28.8% 0.48 kg / 1.05 lbs
477.0 g / 4.7 N

Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 5x7 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 4.09 kg / 9.02 lbs
6 079 Gs
0.61 kg / 1.35 lbs
614 g / 6.0 N
N/A
1 mm 2.64 kg / 5.81 lbs
9 332 Gs
0.40 kg / 0.87 lbs
395 g / 3.9 N
2.37 kg / 5.23 lbs
~0 Gs
2 mm 1.58 kg / 3.49 lbs
7 230 Gs
0.24 kg / 0.52 lbs
237 g / 2.3 N
1.42 kg / 3.14 lbs
~0 Gs
3 mm 0.92 kg / 2.03 lbs
5 516 Gs
0.14 kg / 0.30 lbs
138 g / 1.4 N
0.83 kg / 1.83 lbs
~0 Gs
5 mm 0.31 kg / 0.69 lbs
3 224 Gs
0.05 kg / 0.10 lbs
47 g / 0.5 N
0.28 kg / 0.62 lbs
~0 Gs
10 mm 0.03 kg / 0.07 lbs
1 048 Gs
0.00 kg / 0.01 lbs
5 g / 0.0 N
0.03 kg / 0.07 lbs
~0 Gs
20 mm 0.00 kg / 0.00 lbs
238 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
24 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
15 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
10 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
7 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
5 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
4 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) - warnings
MW 5x7 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 3.5 cm
Hearing aid 10 Gs (1.0 mT) 3.0 cm
Timepiece 20 Gs (2.0 mT) 2.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.0 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 5x7 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 25.73 km/h
(7.15 m/s)
0.03 J
30 mm 44.55 km/h
(12.38 m/s)
0.08 J
50 mm 57.52 km/h
(15.98 m/s)
0.13 J
100 mm 81.34 km/h
(22.59 m/s)
0.26 J

Table 9: Coating parameters (durability)
MW 5x7 / 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 (Pc)
MW 5x7 / N38

Parameter Value SI Unit / Description
Magnetic Flux 1 219 Mx 12.2 µWb
Pc Coefficient 1.05 High (Stable)

Table 11: Submerged application
MW 5x7 / N38

Environment Effective steel pull Effect
Air (land) 0.67 kg Standard
Water (riverbed) 0.77 kg
(+0.10 kg buoyancy gain)
+14.5%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Wall mount (shear)

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

2. Plate thickness effect

*Thin steel (e.g. computer case) drastically weakens the holding force.

3. Thermal stability

*For N38 grade, the max working temp is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.05

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%
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: 010090-2026
Magnet Unit Converter
Pulling force

Magnetic Field

Other products

This product is an extremely powerful rod magnet, composed of modern NdFeB material, which, with dimensions of Ø5x7 mm, guarantees optimal power. The MW 5x7 / N38 model is characterized by high dimensional repeatability and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 0.67 kg), this product is in stock from our European logistics center, ensuring lightning-fast order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It successfully proves itself in DIY projects, advanced robotics, and broadly understood industry, serving as a positioning or actuating element. Thanks to the pull force of 6.60 N with a weight of only 1.03 g, this cylindrical magnet is indispensable in electronics and wherever every gram matters.
Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure long-term durability in industry, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering a great economic balance and operational stability. If you need the strongest magnets in the same volume (Ø5x7), 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 7 mm. The value of 6.60 N means that the magnet is capable of holding a weight many times exceeding its own mass of 1.03 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 7 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.

Pros as well as cons of rare earth magnets.

Pros

Apart from their strong power, neodymium magnets have these key benefits:
  • Their strength remains stable, and after approximately 10 years it decreases only by ~1% (according to research),
  • They show high resistance to demagnetization induced by external disturbances,
  • In other words, due to the metallic finish of gold, the element becomes visually attractive,
  • Magnets possess impressive magnetic induction on the active area,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Possibility of custom modeling and adjusting to precise requirements,
  • Wide application in innovative solutions – they are utilized in data components, motor assemblies, medical equipment, and technologically advanced constructions.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Weaknesses

Characteristics of disadvantages of neodymium magnets: weaknesses and usage proposals
  • At strong impacts they can crack, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • 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, in case of application outdoors
  • We suggest cover - magnetic mount, due to difficulties in creating nuts inside the magnet and complex forms.
  • Possible danger resulting from small fragments of magnets can be dangerous, in case of ingestion, which is particularly important in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products can be problematic in diagnostics medical when they are in the body.
  • With budget limitations the cost of neodymium magnets is economically unviable,

Pull force analysis

Breakaway strength of the magnet in ideal conditionswhat it depends on?

The load parameter shown concerns the limit force, obtained under optimal environment, meaning:
  • on a plate made of structural steel, optimally conducting the magnetic flux
  • with a cross-section of at least 10 mm
  • characterized by even structure
  • with direct contact (without coatings)
  • under axial force direction (90-degree angle)
  • at temperature approx. 20 degrees Celsius

Magnet lifting force in use – key factors

In practice, the actual holding force depends on many variables, listed from crucial:
  • Distance (between the magnet and the metal), because even a very small distance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to paint, rust or debris).
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Steel thickness – insufficiently thick plate does not accept the full field, causing part of the flux to be escaped to the other side.
  • Metal type – different alloys attracts identically. High carbon content worsen the attraction effect.
  • Surface condition – smooth surfaces ensure maximum contact, which improves force. Rough surfaces reduce efficiency.
  • Temperature influence – high temperature weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a slight gap between the magnet and the plate decreases the holding force.

H&S for magnets
Caution required

Handle with care. Rare earth magnets attract from a long distance and snap with massive power, often faster than you can react.

Compass and GPS

A strong magnetic field interferes with the functioning of magnetometers in smartphones and navigation systems. Do not bring magnets near a device to avoid breaking the sensors.

Machining danger

Drilling and cutting of neodymium magnets poses a fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.

ICD Warning

Individuals with a pacemaker must keep an absolute distance from magnets. The magnetism can interfere with the functioning of the life-saving device.

Operating temperature

Do not overheat. NdFeB magnets are sensitive to temperature. If you require operation above 80°C, inquire about HT versions (H, SH, UH).

Swallowing risk

Absolutely keep magnets away from children. Risk of swallowing is significant, and the consequences of magnets clamping inside the body are tragic.

Magnet fragility

NdFeB magnets are sintered ceramics, which means they are fragile like glass. Impact of two magnets leads to them shattering into shards.

Bone fractures

Large magnets can smash fingers instantly. Never place your hand betwixt two attracting surfaces.

Sensitization to coating

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If skin irritation occurs, immediately stop working with magnets and wear gloves.

Data carriers

Very strong magnetic fields can erase data on credit cards, hard drives, and other magnetic media. Maintain a gap of at least 10 cm.

Important! Learn more about hazards in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98