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MW 7x1.5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010393

GTIN/EAN: 5906301811091

5.00

Diameter Ø

7 mm [±0,1 mm]

Height

1.5 mm [±0,1 mm]

Weight

0.43 g

Magnetization Direction

↑ axial

Load capacity

0.69 kg / 6.75 N

Magnetic Induction

243.98 mT / 2440 Gs

Coating

[NiCuNi] Nickel

view parameters »

0.369 ZŁ with VAT / pcs + price for transport

0.300 ZŁ net + 23% VAT / pcs

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Lifting power along with form of a neodymium magnet can be verified using our force calculator.

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Technical - MW 7x1.5 / N38 - cylindrical magnet

Specification / characteristics - MW 7x1.5 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010393
GTIN/EAN 5906301811091
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 1.5 mm [±0,1 mm]
Weight 0.43 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.69 kg / 6.75 N
Magnetic Induction ~ ? 243.98 mT / 2440 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 7x1.5 / 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 modeling of the assembly - report

These data are the outcome of a engineering calculation. Values were calculated on models for the material Nd2Fe14B. Actual parameters might slightly deviate from the simulation results. Please consider these calculations as a preliminary roadmap when designing systems.

Table 1: Static pull force (pull vs distance) - power drop
MW 7x1.5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2438 Gs
243.8 mT
 0.69 kg / 1.52 LBS
690.0 g / 6.8 N
 weak grip
1 mm 1900 Gs
190.0 mT
 0.42 kg / 0.92 LBS
419.1 g / 4.1 N
 weak grip
2 mm 1308 Gs
130.8 mT
 0.20 kg / 0.44 LBS
198.6 g / 1.9 N
 weak grip
3 mm 859 Gs
85.9 mT
 0.09 kg / 0.19 LBS
85.7 g / 0.8 N
 weak grip
5 mm 380 Gs
38.0 mT
 0.02 kg / 0.04 LBS
16.7 g / 0.2 N
 weak grip
10 mm 79 Gs
7.9 mT
 0.00 kg / 0.00 LBS
0.7 g / 0.0 N
 weak grip
15 mm 27 Gs
2.7 mT
 0.00 kg / 0.00 LBS
0.1 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
Pulling power drops significantly with every mm of spacing. Remember that even a microscopic distance (e.g., dirt, paint, veneer) significantly reduces the pull force. Magnets operate optimally at the point of direct contact; air break kills the force. Analyze how quickly the load capacity drop, when the product does not touch flatly to the metal substrate. When calculating the arrangement, eliminate additional spacers.

Table 2: Slippage load (vertical surface)
MW 7x1.5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.14 kg / 0.30 LBS
138.0 g / 1.4 N
1 mm Stal (~0.2) 0.08 kg / 0.19 LBS
84.0 g / 0.8 N
2 mm Stal (~0.2) 0.04 kg / 0.09 LBS
40.0 g / 0.4 N
3 mm Stal (~0.2) 0.02 kg / 0.04 LBS
18.0 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
The following data defines the estimated shear load needed to cause the shifting of the magnet downwards along a vertical steel plate (assuming standard friction coefficient). This parameter depends on the air gap between the magnet and the surface.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MW 7x1.5 / 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
207.0 g / 2.0 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.14 kg / 0.30 LBS
138.0 g / 1.4 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.07 kg / 0.15 LBS
69.0 g / 0.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.35 kg / 0.76 LBS
345.0 g / 3.4 N
When hanging a holder on a upright wall (e.g., a car body), it will only hold barely approx. 20%-30% of nominal attraction strength. Gravitational force as well as a weak degree of grip mean that products move down faster than they pull off. Planning a hanger? Consider that the sliding force is much weaker than the maximum static pull force. On a slippery surface, the element will slide down under a noticeably lighter cargo. Application of an anti-slip coating can significantly raise the stability.

Table 4: Steel thickness (saturation) - sheet metal selection
MW 7x1.5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.07 kg / 0.15 LBS
69.0 g / 0.7 N
1 mm
25%
 0.17 kg / 0.38 LBS
172.5 g / 1.7 N
2 mm
50%
 0.35 kg / 0.76 LBS
345.0 g / 3.4 N
3 mm
75%
 0.52 kg / 1.14 LBS
517.5 g / 5.1 N
5 mm
100%
 0.69 kg / 1.52 LBS
690.0 g / 6.8 N
10 mm
100%
 0.69 kg / 1.52 LBS
690.0 g / 6.8 N
11 mm
100%
 0.69 kg / 1.52 LBS
690.0 g / 6.8 N
12 mm
100%
 0.69 kg / 1.52 LBS
690.0 g / 6.8 N
A thin sheet is not enough to take in the full magnetic flux, which weakens actual performance of the magnet. Should you attach a powerful product to a thin surface, the field will penetrate right through and the holding will be smaller. To utilize full efficiency of this neodymium's power, you require a sufficiently solid element of metal. The material oversaturation means that on thin elements (e.g., appliance housings), the magnet holds weaker. We advise picking the steel cross-section from these parameters.

Table 5: Thermal stability (stability) - power drop
MW 7x1.5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.69 kg / 1.52 LBS
690.0 g / 6.8 N
 OK
40 °C -2.2% 0.67 kg / 1.49 LBS
674.8 g / 6.6 N
 OK
60 °C -4.4% 0.66 kg / 1.45 LBS
659.6 g / 6.5 N
80 °C -6.6% 0.64 kg / 1.42 LBS
644.5 g / 6.3 N
100 °C -28.8% 0.49 kg / 1.08 LBS
491.3 g / 4.8 N
Classic neodymiums change their properties power past the thermal threshold. Avoid high temperatures – heat can irreversibly demagnetize this product. With every degree above norm, the neodymium's force momentarily drops. Avoid using this magnet near heat sources exceeding its working range. Too high temperature will cause irreversible degradation of magnetism.
*Engineering note: Heat tolerance is determined by both grade, but also on the magnet's shape. Low-profile magnets (pancake types) risk losing magnetic properties at lower temperatures than long magnets. Red status in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 7x1.5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 1.41 kg / 3.11 LBS
4 025 Gs
0.21 kg / 0.47 LBS
212 g / 2.1 N
 N/A
1 mm 1.15 kg / 2.53 LBS
4 398 Gs
0.17 kg / 0.38 LBS
172 g / 1.7 N
 1.03 kg / 2.28 LBS
~0 Gs
2 mm 0.86 kg / 1.89 LBS
3 801 Gs
0.13 kg / 0.28 LBS
129 g / 1.3 N
 0.77 kg / 1.70 LBS
~0 Gs
3 mm 0.60 kg / 1.33 LBS
3 185 Gs
0.09 kg / 0.20 LBS
90 g / 0.9 N
 0.54 kg / 1.19 LBS
~0 Gs
5 mm 0.27 kg / 0.59 LBS
2 125 Gs
0.04 kg / 0.09 LBS
40 g / 0.4 N
 0.24 kg / 0.53 LBS
~0 Gs
10 mm 0.03 kg / 0.08 LBS
759 Gs
0.01 kg / 0.01 LBS
5 g / 0.1 N
 0.03 kg / 0.07 LBS
~0 Gs
20 mm 0.00 kg / 0.00 LBS
159 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
13 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
8 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 wider radius than a magnet and steel setup. The setup of two magnets creates a more powerful interaction and a wider radius of performance. Planning to create a strong closure? Utilize two neodymiums instead of a neodymium and a striker plate. Exercise caution that when attracting two neodymiums, the pinch force is massive. The repulsion force is slightly lower than the connection force, but still significant.
*Field value for N-N configuration drops to ~0 Gs in the exact middle between the magnets (due to field cancellation).
Note: Results apply to sliding force of dual matching neodymium magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Hazards (electronics) - precautionary measures
MW 7x1.5 / 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
Remote 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
Extremely neodym field poses a real danger to electronic devices and medical implants. These magnets produce a flux that destroys function of sensitive medical devices. Remember: the invisible magnetic field acts through matter and plastic. Special caution must be taken by people with hearing aids and insulin pumps. Influence will be felt by: mechanical watches, remotes, membranes, and displays. Do not bring the product near payment cards, HDD media, or sensitive navigation tools.

Table 8: Collisions (kinetic energy) - collision effects
MW 7x1.5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 40.43 km/h
(11.23 m/s)
 0.03 J
30 mm 69.97 km/h
(19.44 m/s)
 0.08 J
50 mm 90.34 km/h
(25.09 m/s)
 0.14 J
100 mm 127.75 km/h
(35.49 m/s)
 0.27 J
NdFeB products are prone to chipping – a violent impact against metal risks their cracking. Pay attention to connection velocity – a magnet released freely becomes dangerous. Kinetic force can trigger coating fragments or painful pinches to skin. Be sure to control the product during bringing near metal so it doesn't hit with great force against the metal. A collision at high speed almost guarantees destruction of the neodymium. Wear safety glasses when handling with large magnets.

Table 9: Anti-corrosion coating durability
MW 7x1.5 / 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)
The SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Electrical data (Pc)
MW 7x1.5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 1 075 Mx 10.8 µWb
Pc Coefficient 0.31 Low (Flat)
Flux value emitted by the pole surface. Key data when building generators and motors. The Pc coefficient defines the working geometry.

Table 11: Submerged application
MW 7x1.5 / N38

Environment Effective steel pull Effect
Air (land) 0.69 kg Standard
Water (riverbed) 0.79 kg
(+0.10 kg buoyancy gain)
+14.5%
Warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
Contrary to myths, water does not block the magnetic field. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.
1. Vertical hold

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

2. Steel thickness impact

*Thin metal sheet (e.g. 0.5mm PC case) severely reduces the holding force.

3. Heat tolerance

*For standard magnets, the safety limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.31

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: 010393-2026
Magnet Unit Converter
Pulling force
Magnetic Induction
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The presented product is an extremely powerful rod magnet, composed of modern NdFeB material, which, with dimensions of Ø7x1.5 mm, guarantees optimal power. This specific item features an accuracy of ±0.1mm and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 0.69 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring lightning-fast order fulfillment. Moreover, its Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 6.75 N with a weight of only 0.43 g, this cylindrical magnet is indispensable in electronics and wherever every gram matters.
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., 7.1 mm) using epoxy glues. To ensure stability 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 popular standard for professional neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø7x1.5), 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 Ø7x1.5 mm, which, at a weight of 0.43 g, makes it an element with impressive magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 0.69 kg (force ~6.75 N), which, with such defined dimensions, proves the high power 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 1.5 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 diametrically if your project requires it.

Advantages and disadvantages of rare earth magnets.

Strengths

Besides their tremendous field intensity, neodymium magnets offer the following advantages:
  • They do not lose strength, even over nearly 10 years – the reduction in strength is only ~1% (according to tests),
  • Neodymium magnets prove to be exceptionally resistant to magnetic field loss caused by magnetic disturbances,
  • The use of an aesthetic coating of noble metals (nickel, gold, silver) causes the element to present itself better,
  • They show high magnetic induction at the operating surface, making them more effective,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
  • Possibility of individual modeling as well as adjusting to concrete needs,
  • Huge importance in modern industrial fields – they are utilized in computer drives, drive modules, advanced medical instruments, also technologically advanced constructions.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Weaknesses

Disadvantages of neodymium magnets:
  • Brittleness is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a steel housing, which not only protects them against impacts but also increases their 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 and 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
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
  • We recommend casing - magnetic holder, due to difficulties in producing threads inside the magnet and complex shapes.
  • Potential hazard related to microscopic parts of magnets can be dangerous, if swallowed, which becomes key in the context of child health protection. Additionally, tiny parts of these magnets can complicate diagnosis medical after entering the body.
  • With large orders the cost of neodymium magnets is economically unviable,

Holding force characteristics

Best holding force of the magnet in ideal parameters – what contributes to it?

Magnet power is the result of a measurement for the most favorable conditions, assuming:
  • with the application of a yoke made of special test steel, guaranteeing full magnetic saturation
  • whose thickness reaches at least 10 mm
  • with an ideally smooth contact surface
  • under conditions of no distance (surface-to-surface)
  • during pulling in a direction perpendicular to the plane
  • at conditions approx. 20°C

Key elements affecting lifting force

During everyday use, the real power is determined by many variables, presented from the most important:
  • Distance – existence of foreign body (paint, tape, air) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
  • Angle of force application – highest force is available only during perpendicular pulling. The force required to slide of the magnet along the surface is standardly several times smaller (approx. 1/5 of the lifting capacity).
  • Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Metal type – different alloys reacts the same. High carbon content weaken the attraction effect.
  • Surface finish – full contact is obtained only on smooth steel. Rough texture create air cushions, weakening the magnet.
  • Heat – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, however under parallel forces the load capacity is reduced by as much as 75%. In addition, even a slight gap between the magnet and the plate reduces the holding force.

H&S for magnets
Skin irritation risks

Studies show that the nickel plating (the usual finish) is a strong allergen. If your skin reacts to metals, refrain from direct skin contact or opt for encased magnets.

No play value

Adult use only. Tiny parts pose a choking risk, leading to intestinal necrosis. Keep away from children and animals.

Phone sensors

Remember: rare earth magnets produce a field that disrupts sensitive sensors. Keep a safe distance from your mobile, device, and navigation systems.

Flammability

Dust generated during cutting of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.

Keep away from computers

Avoid bringing magnets near a purse, laptop, or screen. The magnetism can irreversibly ruin these devices and wipe information from cards.

Respect the power

Before starting, check safety instructions. Uncontrolled attraction can break the magnet or injure your hand. Think ahead.

Demagnetization risk

Regular neodymium magnets (N-type) lose magnetization when the temperature goes above 80°C. The loss of strength is permanent.

Medical implants

Patients with a pacemaker have to maintain an safe separation from magnets. The magnetic field can interfere with the operation of the implant.

Magnet fragility

Despite the nickel coating, neodymium is brittle and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Serious injuries

Large magnets can break fingers in a fraction of a second. Under no circumstances put your hand between two attracting surfaces.

Caution! Learn more about risks in the article: Magnet Safety Guide.