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MW 3x6 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010065

GTIN: 5906301810643

5.00

Diameter Ø

3 mm [±0,1 mm]

Height

6 mm [±0,1 mm]

Weight

0.32 g

Magnetization Direction

↑ axial

Load capacity

0.54 kg / 5.27 N

Magnetic Induction

598.96 mT

Coating

[NiCuNi] Nickel

0.295 ZŁ with VAT / pcs + price for transport

0.240 ZŁ net + 23% VAT / pcs

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Lifting power as well as form of a magnet can be tested using our modular calculator.

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MW 3x6 / N38 - cylindrical magnet

Specification / characteristics MW 3x6 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010065
GTIN	5906301810643
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	3 mm [±0,1 mm]
Height	6 mm [±0,1 mm]
Weight	0.32 g
Magnetization Direction	↑ axial
Load capacity ~ ?	0.54 kg / 5.27 N
Magnetic Induction ~ ?	598.96 mT
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 3x6 / N38 - cylindrical magnet

properties	values	units
remenance Br [Min. - Max.] ?	12.2-12.6	kGs
remenance Br [Min. - Max.] ?	1220-1260	T
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 106	°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 analysis of the magnet - parameters

Presented information are the outcome of a mathematical simulation. Results are based on models for the NdFeB class. Actual parameters may deviate from the simulation. Treat these calculations as a reference point for designers.

Table 1: Static force (force vs gap) - power drop
MW 3x6 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	5974 Gs 597.4 mT	0.54 kg / 540.0 g 5.3 N	safe
1 mm	2623 Gs 262.3 mT	0.10 kg / 104.1 g 1.0 N	safe
2 mm	1134 Gs 113.4 mT	0.02 kg / 19.5 g 0.2 N	safe
5 mm	205 Gs 20.5 mT	0.00 kg / 0.6 g 0.0 N	safe
10 mm	42 Gs 4.2 mT	0.00 kg / 0.0 g 0.0 N	safe
15 mm	15 Gs 1.5 mT	0.00 kg / 0.0 g 0.0 N	safe
20 mm	7 Gs 0.7 mT	0.00 kg / 0.0 g 0.0 N	safe
30 mm	2 Gs 0.2 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 sharply with every mm of distance. Remember that even the smallest break (e.g., dirt, paint, veneer) strongly reduces the holding power. Neodymiums work most effectively at the point of contact; distance kills the power. Observe how rapidly the load capacity plummets when the product does not touch flatly to the metal. When planning the assembly, eliminate unnecessary distances.

Table 2: Vertical assembly (sliding) - behavior on slippery surfaces
MW 3x6 / N38

Surface Type	Friction Coefficient / % Mocy	Max Load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.16 kg / 162.0 g 1.6 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.11 kg / 108.0 g 1.1 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.05 kg / 54.0 g 0.5 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	0.27 kg / 270.0 g 2.6 N

When placing a magnet on a upright surface (e.g., a board), it will only hold only about 20%-30% of its nominal force. Gravitational force as well as a weak friction coefficient mean that products slide down easier than they pull off. Want to make a hanger? Remember that the shear force is much lower than the breakaway force. On a smooth steel, the element will slip down under a significantly smaller load. Using an rubber coating can significantly improve the grip.

Table 3: Steel thickness (saturation) - sheet metal selection
MW 3x6 / N38

Steel Thickness (mm)	% Power	Real Pull (kg)
0.5 mm	10%	0.05 kg / 54.0 g 0.5 N
1 mm	25%	0.14 kg / 135.0 g 1.3 N
2 mm	50%	0.27 kg / 270.0 g 2.6 N
5 mm	100%	0.54 kg / 540.0 g 5.3 N
10 mm	100%	0.54 kg / 540.0 g 5.3 N

A too thin surface is incapable of absorb the entire magnetic field, which wastes the magnet's potential. If you mount a powerful magnet to thin surfaces, the flux will penetrate right through and the holding will be weaker. To achieve the maximum of this neodymium's potential, you require a sufficiently solid piece of steel. The saturation effect causes that on delicate elements (e.g., car bodies), the magnet holds worse. We recommend choosing the steel cross-section according to the table below.

Table 4: Working in heat (behavior) - power drop
MW 3x6 / N38

Ambient Temp. (°C)	Power Loss	Remaining Pull	Status
20 °C	0.0%	0.54 kg / 540.0 g 5.3 N	OK
40 °C	-2.2%	0.53 kg / 528.1 g 5.2 N	OK
60 °C	-4.4%	0.52 kg / 516.2 g 5.1 N	OK
80 °C	-6.6%	0.50 kg / 504.4 g 4.9 N
100 °C	-28.8%	0.38 kg / 384.5 g 3.8 N

Classic neodymium magnets irreversibly lose their magnetic properties after exceeding the maximum temperature. Watch out for high temperatures – heat can irreversibly damage this product. With increasing heat, the neodymium's power temporarily drops. Do not use this product near heaters exceeding its working range. Ignoring the critical threshold will cause irreversible degradation of magnetic properties.

Table 5: Two magnets (attraction) - field range
MW 3x6 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	0.81 kg / 810.0 g 7.9 N	N/A
2 mm	0.03 kg / 30.0 g 0.3 N	0.03 kg / 28.0 g 0.3 N
5 mm	0.00 kg / 0.0 g 0.0 N	0.00 kg / 0.0 g 0.0 N
10 mm	0.00 kg / 0.0 g 0.0 N	0.00 kg / 0.0 g 0.0 N
20 mm	0.00 kg / 0.0 g 0.0 N	0.00 kg / 0.0 g 0.0 N
50 mm	0.00 kg / 0.0 g 0.0 N	0.00 kg / 0.0 g 0.0 N

Two strong neodymiums interact from a significantly greater distance than a magnet and steel combination. A two-magnet connection generates a more powerful field and a larger range of action. Want to build a strong closure? Use a set of two of neodymiums instead of a neodymium and a striker plate. Be careful that when connecting a pair of magnets, the pinch force is massive. The repulsion force is slightly weaker than the attraction, but still substantial.

Table 6: Protective zones (electronics) - hazards
MW 3x6 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	2.5 cm
Hearing aid / Implant	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)	1.0 cm
Payment card	400 Gs (40.0 mT)	0.5 cm
HDD hard drive	600 Gs (60.0 mT)	0.5 cm

A powerful magnet radiation poses a real hazard to electronic devices and medical implants. These magnets produce a flux that destroys the function of delicate digital devices. Remember: the invisible magnetic field passes through tissues and plastic. Exceptional care must be exercised by people with hearing aids and drug dispensers. Also at risk are: automatic timepieces, car keys, membranes, and displays. Do not place the product near cards, HDD media, or precise navigation instruments.

Table 7: Collisions (kinetic energy) - warning
MW 3x6 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	41.43 km/h (11.51 m/s)	0.02 J
30 mm	71.76 km/h (19.93 m/s)	0.06 J
50 mm	92.64 km/h (25.73 m/s)	0.11 J
100 mm	131.01 km/h (36.39 m/s)	0.21 J

Neodymium magnets are fragile – a uncontrolled impact against metal can result in their cracking. Pay attention to the impact speed – a neodymium released freely becomes dangerous. Impact energy can trigger material chips or dangerous crushing of fingers. Always control the magnet during installation so it doesn't hit the steel with great force. A contact at a speed of dozens of km/h means the destruction of the neodymium. Wear safety glasses when working with powerful specimens.

Table 8: Anti-corrosion coating durability
MW 3x6 / 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 9: Physics of underwater searching
MW 3x6 / N38

Environment	Effective Steel Pull	Effect
Air (Land)	0.54 kg	Standard
Water (Riverbed)	0.62 kg (+0.08 kg Buoyancy gain)	+14.5%

Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

Interestingly, in water, the magnet feels 'stronger' due to Archimedes' principle. However, remember the water resistance when pulling the rope quickly.

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The presented product is a very strong rod magnet, composed of modern NdFeB material, which, at dimensions of Ø3x6 mm, guarantees maximum efficiency. This specific item features high dimensional repeatability and industrial build quality, making it a perfect solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 0.54 kg), this product is in stock from our warehouse in Poland, ensuring quick order fulfillment. Furthermore, 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 modeling, advanced robotics, and broadly understood industry, serving as a positioning or actuating element. Thanks to the pull force of 5.27 N with a weight of only 0.32 g, this cylindrical magnet 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., 3.1 mm) using epoxy glues. To ensure long-term durability in automation, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.

Magnets N38 are strong enough for the majority of applications in modeling and machine building, where excessive miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø3x6), 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 Ø3x6 mm, which, at a weight of 0.32 g, makes it an element with impressive magnetic energy density. The value of 5.27 N means that the magnet is capable of holding a weight many times exceeding its own mass of 0.32 g. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.

Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 3 mm. 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 through the diameter if your project requires it.

Advantages as well as disadvantages of rare earth magnets.

Besides their stability, neodymium magnets are valued for these benefits:

They have constant strength, and over around ten years their attraction force decreases symbolically – ~1% (in testing),
They possess excellent resistance to magnetism drop as a result of external fields,
A magnet with a shiny nickel surface looks better,
Magnets are distinguished by maximum magnetic induction on the surface,
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 the potential of accurate molding and adaptation to specialized needs, neodymium magnets can be produced in a broad palette of forms and dimensions, which expands the range of possible applications,
Significant place in modern industrial fields – they are used in hard drives, electromotive mechanisms, medical devices, also complex engineering applications.
Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Disadvantages of neodymium magnets:

At strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (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 very resistant to heat
When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
Due to limitations in realizing threads and complicated shapes in magnets, we recommend using cover - magnetic mechanism.
Potential hazard resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child health protection. Additionally, small components of these products can complicate diagnosis medical in case of swallowing.
High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities

Magnetic strength at its maximum – what affects it?

Information about lifting capacity is the result of a measurement for ideal contact conditions, taking into account:

using a plate made of high-permeability steel, serving as a magnetic yoke
possessing a massiveness of min. 10 mm to avoid saturation
with a surface cleaned and smooth
with direct contact (without paint)
during pulling in a direction perpendicular to the plane
at room temperature

Determinants of practical lifting force of a magnet

Effective lifting capacity is affected by working environment parameters, mainly (from priority):

Distance – existence of foreign body (rust, dirt, gap) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
Force direction – catalog parameter refers to detachment vertically. When applying parallel force, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
Steel thickness – too thin sheet causes magnetic saturation, causing part of the power to be escaped into the air.
Material composition – different alloys reacts the same. High carbon content worsen the interaction with the magnet.
Surface quality – the more even the plate, the better the adhesion and higher the lifting capacity. Roughness acts like micro-gaps.
Heat – NdFeB sinters 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 conducted on a smooth plate of optimal thickness, under a perpendicular pulling force, however under parallel forces the load capacity is reduced by as much as 5 times. Additionally, even a slight gap {between} the magnet’s surface and the plate decreases the holding force.

Precautions when working with NdFeB magnets

Nickel coating and allergies

A percentage of the population experience a sensitization to Ni, which is the common plating for neodymium magnets. Prolonged contact may cause a rash. We suggest wear protective gloves.

This is not a toy

Product intended for adults. Tiny parts pose a choking risk, causing severe trauma. Store away from kids and pets.

Threat to electronics

Device Safety: Strong magnets can damage payment cards and delicate electronics (heart implants, hearing aids, mechanical watches).

Demagnetization risk

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

Danger to pacemakers

Warning for patients: Strong magnetic fields affect medical devices. Maintain at least 30 cm distance or ask another person to handle the magnets.

Crushing risk

Pinching hazard: The attraction force is so immense that it can result in blood blisters, pinching, and even bone fractures. Use thick gloves.

Phone sensors

Navigation devices and mobile phones are extremely sensitive to magnetic fields. Close proximity with a strong magnet can permanently damage the internal compass in your phone.

Combustion hazard

Drilling and cutting of NdFeB material poses a fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Handling rules

Handle magnets with awareness. Their immense force can shock even experienced users. Plan your moves and respect their power.

Magnets are brittle

Beware of splinters. Magnets can explode upon uncontrolled impact, launching shards into the air. Eye protection is mandatory.

Danger!

Looking for details? Read our article: Are neodymium magnets dangerous?

MW 3x6 / N38 - cylindrical magnet

MW 3x6 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering analysis of the magnet - parameters

Other products

SM 32x200 [2xM8] / N42 - magnetic separator

MW 5x1 / N38 - cylindrical magnet

MW 18.9x10 / N38 - cylindrical magnet

UMGW 20x15x7 [M4] GW / N38 - magnetic holder internal thread

Advantages as well as disadvantages of rare earth magnets.

Magnetic strength at its maximum – what affects it?

Determinants of practical lifting force of a magnet

Precautions when working with NdFeB magnets

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C