Product available Ships tomorrow

MW 7x2 / N38 - cylindrical magnet

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, Poland, 05-850, PL
Telephone: +48 22 499 98 98
Price range: 1-6500
Rating: 5

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

technical specifications »

0.381 ZŁ with VAT / pcs + price for transport

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Technical - 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

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 - technical parameters

Presented information constitute the outcome of a mathematical calculation. Values are based on algorithms for the material Nd₂Fe₁₄B. Operational performance might slightly differ from theoretical values. Please consider these data as a preliminary roadmap during assembly planning.

Table 1: Static pull force (pull vs distance) - power drop
MW 7x2 / N38

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

Magnetic force decreases significantly with every subsequent millimeter of distance. Keep in mind that even a microscopic distance (e.g., contamination, varnish, rust) strongly weakens the grip. Magnetic products work strongest during direct contact; distance nullifies the force. Analyze how flashily the pull force plummet, when the magnet does not adhere directly to the metal substrate. When calculating the arrangement, avoid unnecessary gaps.

Table 2: Sliding force (vertical surface)
MW 7x2 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	0.20 kg / 198.0 g 1.9 N
1 mm	Stal (~0.2)	0.11 kg / 114.0 g 1.1 N
2 mm	Stal (~0.2)	0.05 kg / 54.0 g 0.5 N
3 mm	Stal (~0.2)	0.02 kg / 22.0 g 0.2 N
5 mm	Stal (~0.2)	0.00 kg / 4.0 g 0.0 N
10 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
15 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N

The following data calculates the estimated weight limit required to initiate the downward movement of the magnet vertically along a vertical metal surface (considering standard friction). This parameter varies with the gap size between the magnet and the metal.

Table 3: Wall mounting (shearing) - vertical pull
MW 7x2 / N38

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

When hanging a element on a upright surface (e.g., a car body), it will only hold barely about 20%-30% of its maximum pull force. Gravitational force as well as a low friction coefficient influence the fact that products slip faster than they pull off. Designing a wall mount? Note that the sliding force is significantly lower than the perpendicular breakaway force. On a smooth steel, the element will slide down under a significantly smaller load. Utilizing a rubberized pad can drastically increase the grip.

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

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	10%	0.10 kg / 99.0 g 1.0 N
1 mm	25%	0.25 kg / 247.5 g 2.4 N
2 mm	50%	0.50 kg / 495.0 g 4.9 N
5 mm	100%	0.99 kg / 990.0 g 9.7 N
10 mm	100%	0.99 kg / 990.0 g 9.7 N

A thin metal plate is not enough to conduct the entire magnetic field, which wastes potential of the magnet. If you install a neodymium to a too thin substrate, the magnetism will pass right through and the holding will be smaller. To achieve the maximum of this magnet's potential, you require a sufficiently solid backing of steel. The saturation effect causes that on thin elements (e.g., car bodies), the magnet works worse. We suggest choosing the steel dimension based on the following data.

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

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

Classic neodymiums lose parameters past the thermal threshold. Watch out for overheating – heat can irreversibly damage this product. With increasing heat, the neodymium's capacity temporarily lowers. Refrain from using this magnet close to ovens higher than its operating temperature limit. Too high temperature will result in permanent loss of magnetism.

*Important note: Heat tolerance depends not only on the material grade, and the Permeance Coefficient Pc. Thin magnets (pancake types) risk losing magnetic properties under lower heat stress than taller cylinders. The danger warning in the table signals a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (attraction) - forces in the system
MW 7x2 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	2.24 kg / 2236 g 21.9 N 4 653 Gs	N/A
1 mm	1.76 kg / 1764 g 17.3 N 5 454 Gs	1.59 kg / 1588 g 15.6 N ~0 Gs
2 mm	1.29 kg / 1290 g 12.7 N 4 663 Gs	1.16 kg / 1161 g 11.4 N ~0 Gs
3 mm	0.89 kg / 895 g 8.8 N 3 884 Gs	0.81 kg / 805 g 7.9 N ~0 Gs
5 mm	0.40 kg / 395 g 3.9 N 2 581 Gs	0.36 kg / 356 g 3.5 N ~0 Gs
10 mm	0.05 kg / 52 g 0.5 N 932 Gs	0.05 kg / 46 g 0.5 N ~0 Gs
20 mm	0.00 kg / 2 g 0.0 N 200 Gs	0.00 kg / 0 g 0.0 N ~0 Gs
50 mm	0.00 kg / 0 g 0.0 N 17 Gs	0.00 kg / 0 g 0.0 N ~0 Gs

Two strong neodymiums interact from a much further distance than a magnet and sheet setup. The connection of magnet-to-magnet generates a stronger field and a further horizon of performance. Designing a solid fastener? Utilize two neodymiums instead of one magnet and a striker plate. Remember that when attracting two neodymiums, the impact force is extreme. The repulsion force is slightly lower than the connection force, but still impressive.
*Flux density between like poles reaches ~0 Gs in the exact middle of the gap (due to field cancellation).

Table 7: Protective zones (electronics) - warnings
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
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)	1.0 cm
HDD hard drive	600 Gs (60.0 mT)	0.5 cm

A strong magnetic field poses a real danger to IT equipment as well as pacemakers. These magnets produce a field that disrupts operation of sensitive medical devices. Remember: the unseen radiation acts through matter and plastic. Exceptional care must be taken by people with cochlear implants and insulin pumps. Influence will be felt by: mechanical watches, car keys, membranes, and screens. Do not bring the product near payment cards, HDD media, or sensitive navigation tools.

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

Start from (mm)	Speed (km/h)	Energy (J)
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

Neodymium magnets are very brittle – a violent impact against metal causes immediate chipping. Pay attention to connection velocity – a neodymium left loose becomes dangerous. Striking energy can destroy the magnet or dangerous crushing to skin. Hold the magnet firmly during bringing near metal so it doesn't hit violently against the metal. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Wear eye protection when handling with powerful specimens.

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)

Neodymium magnets are highly susceptible to corrosion without proper protection. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (P_c)
MW 7x2 / N38

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

Flux value passing through the pole surface. Key data when building generators as well as sensors. P_c value defines the magnet's operating point.

Table 11: Physics of underwater searching
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.

The magnetic field penetrates through water without any losses. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Sliding resistance

*Caution: On a vertical wall, the magnet retains merely ~20% of its perpendicular strength.

2. Steel thickness impact

*Thin steel (e.g. 0.5mm PC case) drastically reduces the holding force.

3. Power loss vs temp

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

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

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

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 P_c (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 P_c 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

Elemental analysis

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: 010099-2025

Magnet Unit Converter

Force (pull)

Force in kg

Force (N)

Pounds (lbs)

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Input a value into a field, and all other values change instantly.

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The offered product is an exceptionally strong cylindrical magnet, produced from advanced NdFeB material, which, at dimensions of Ø7x2 mm, guarantees optimal power. This specific item is characterized by a tolerance of ±0.1mm and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a magnetic rod with significant force (approx. 0.99 kg), this product is in stock from our European logistics center, ensuring lightning-fast order fulfillment. Moreover, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.

This model is ideal for building electric motors, advanced sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the pull force of 9.76 N with a weight of only 0.58 g, this rod 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 long-term durability in industry, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.

Magnets NdFeB grade N38 are strong enough for 90% of applications in automation and machine building, where excessive miniaturization with maximum force is not required. 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 warehouse.

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. 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 diametrically if your project requires it.

Pros as well as cons of rare earth magnets.

Pros

In addition to their pulling strength, neodymium magnets provide the following advantages:

Their magnetic field is maintained, and after approximately 10 years it drops only by ~1% (theoretically),
They are extremely resistant to demagnetization induced by external field influence,
In other words, due to the reflective layer of nickel, the element becomes visually attractive,
They feature high magnetic induction at the operating surface, which improves attraction properties,
Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling operation at temperatures approaching 230°C and above...
Thanks to flexibility in shaping and the capacity to customize to complex applications,
Significant place in innovative solutions – they find application in HDD drives, electric motors, medical equipment, and technologically advanced constructions.
Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Weaknesses

Disadvantages of NdFeB magnets:

They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
Due to limitations in realizing nuts and complex shapes in magnets, we recommend using cover - magnetic mechanism.
Health risk to health – tiny shards of magnets are risky, in case of ingestion, which is particularly important in the context of child safety. Additionally, small elements of these products are able to complicate diagnosis medical when they are in the body.
Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Pull force analysis

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

Holding force of 0.99 kg is a measurement result conducted under specific, ideal conditions:

using a sheet made of mild steel, acting as a ideal flux conductor
possessing a massiveness of minimum 10 mm to ensure full flux closure
with a surface cleaned and smooth
without any air gap between the magnet and steel
for force acting at a right angle (pull-off, not shear)
at ambient temperature approx. 20 degrees Celsius

Key elements affecting lifting force

Bear in mind that the magnet holding may be lower depending on elements below, starting with the most relevant:

Distance – existence of any layer (paint, tape, air) interrupts the magnetic circuit, which reduces capacity rapidly (even by 50% at 0.5 mm).
Direction of force – maximum parameter is available only during pulling at a 90° angle. The shear force of the magnet along the plate is usually several times lower (approx. 1/5 of the lifting capacity).
Substrate thickness – for full efficiency, the steel must be adequately massive. Thin sheet restricts the attraction force (the magnet "punches through" it).
Material type – ideal substrate is high-permeability steel. Cast iron may attract less.
Smoothness – ideal contact is possible only on smooth steel. Rough texture create air cushions, reducing force.
Temperature – heating the magnet causes a temporary drop of force. Check the thermal limit for a given model.

Lifting capacity was measured using a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, however under shearing force the holding force is lower. Moreover, even a slight gap between the magnet’s surface and the plate lowers the load capacity.

Safety rules for work with NdFeB magnets

Immense force

Be careful. Rare earth magnets attract from a distance and snap with massive power, often faster than you can move away.

Fire risk

Dust created during cutting of magnets is self-igniting. Do not drill into magnets unless you are an expert.

Heat warning

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

Keep away from electronics

Remember: neodymium magnets generate a field that interferes with precision electronics. Keep a separation from your mobile, tablet, and navigation systems.

Cards and drives

Intense magnetic fields can corrupt files on payment cards, HDDs, and other magnetic media. Keep a distance of at least 10 cm.

Bone fractures

Large magnets can crush fingers instantly. Never put your hand between two strong magnets.

Allergic reactions

Nickel alert: The nickel-copper-nickel coating contains nickel. If skin irritation occurs, immediately stop working with magnets and wear gloves.

Implant safety

Warning for patients: Powerful magnets affect electronics. Maintain at least 30 cm distance or ask another person to work with the magnets.

Risk of cracking

Despite the nickel coating, the material is delicate and cannot withstand shocks. Avoid impacts, as the magnet may crumble into hazardous fragments.

Adults only

Product intended for adults. Tiny parts can be swallowed, causing serious injuries. Keep out of reach of children and animals.

Safety First! Need more info? Read our article: Why are neodymium magnets dangerous?

MW 7x2 / N38 - cylindrical magnet

Technical - MW 7x2 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering modeling of the product - technical parameters

Table 1: Static pull force (pull vs distance) - power drop MW 7x2 / N38

Table 2: Sliding force (vertical surface) MW 7x2 / N38

Table 3: Wall mounting (shearing) - vertical pull MW 7x2 / N38

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

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

Table 6: Two magnets (attraction) - forces in the system MW 7x2 / N38

Table 7: Protective zones (electronics) - warnings MW 7x2 / N38

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

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

Table 10: Electrical data (Pc) MW 7x2 / N38

Table 11: Physics of underwater searching MW 7x2 / N38

1. Sliding resistance

2. Steel thickness impact

3. Power loss vs temp

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

Elemental analysis

Ecology and recycling (GPSR)

Force (pull)

Field Strength

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Pros as well as cons of rare earth magnets.

Pros

Weaknesses

Pull force analysis

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

Key elements affecting lifting force

Safety rules for work with NdFeB magnets

Immense force

Fire risk

Heat warning

Keep away from electronics

Cards and drives

Bone fractures

Allergic reactions

Implant safety

Risk of cracking

Adults only

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs distance) - power drop
MW 7x2 / N38

Table 2: Sliding force (vertical surface)
MW 7x2 / N38

Table 3: Wall mounting (shearing) - vertical pull
MW 7x2 / N38

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

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

Table 6: Two magnets (attraction) - forces in the system
MW 7x2 / N38

Table 7: Protective zones (electronics) - warnings
MW 7x2 / N38

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

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

Table 10: Electrical data (P_c)
MW 7x2 / N38

Table 11: Physics of underwater searching
MW 7x2 / N38