Product available Ships tomorrow

MW 38x3.5 / 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 010062

GTIN: 5906301810612

5.00

Diameter Ø

38 mm [±0,1 mm]

Height

3.5 mm [±0,1 mm]

Weight

29.77 g

Magnetization Direction

↑ axial

Load capacity

5.09 kg / 49.91 N

Magnetic Induction

112.31 mT / 1123 Gs

Coating

[NiCuNi] Nickel

15.83 ZŁ with VAT / pcs + price for transport

12.87 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

12.87 ZŁ

15.83 ZŁ

price from 50 pcs

12.10 ZŁ

14.88 ZŁ

price from 200 pcs

11.33 ZŁ

13.93 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Not sure where to buy?

Pick up the phone and ask +48 22 499 98 98 or contact us by means of form the contact page.
Weight along with appearance of a magnet can be tested with our online calculation tool.

Same-day shipping for orders placed before 14:00.

MW 38x3.5 / N38 - cylindrical magnet

Specification / characteristics MW 38x3.5 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010062
GTIN	5906301810612
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	38 mm [±0,1 mm]
Height	3.5 mm [±0,1 mm]
Weight	29.77 g
Magnetization Direction	↑ axial
Load capacity ~ ?	5.09 kg / 49.91 N
Magnetic Induction ~ ?	112.31 mT / 1123 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 38x3.5 / 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

Technical analysis of the product - technical parameters

These values are the result of a physical analysis. Results are based on models for the class NdFeB. Real-world performance might slightly differ from theoretical values. Treat these data as a supplementary guide for designers.

Table 1: Static pull force (pull vs distance) - power drop
MW 38x3.5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	1123 Gs 112.3 mT	5.09 kg / 5090.0 g 49.9 N	warning
1 mm	1103 Gs 110.3 mT	4.91 kg / 4910.1 g 48.2 N	warning
2 mm	1075 Gs 107.5 mT	4.66 kg / 4663.0 g 45.7 N	warning
3 mm	1040 Gs 104.0 mT	4.36 kg / 4364.2 g 42.8 N	warning
5 mm	954 Gs 95.4 mT	3.67 kg / 3673.1 g 36.0 N	warning
10 mm	703 Gs 70.3 mT	2.00 kg / 1997.1 g 19.6 N	low risk
15 mm	483 Gs 48.3 mT	0.94 kg / 943.2 g 9.3 N	low risk
20 mm	326 Gs 32.6 mT	0.43 kg / 429.7 g 4.2 N	low risk
30 mm	155 Gs 15.5 mT	0.10 kg / 97.1 g 1.0 N	low risk
50 mm	47 Gs 4.7 mT	0.01 kg / 8.9 g 0.1 N	low risk

Grip strength drops significantly with every subsequent millimeter of spacing. Remember that even a very thin break (e.g., contamination, varnish, rust) strongly reduces the pull force. Neodymiums hold strongest during direct contact; distance weakens the power. Observe how quickly the load capacity fall, when the magnet does not adhere tightly to the steel surface. When designing the assembly, avoid redundant distances.

Table 2: Shear Capacity (Vertical Surface)
MW 38x3.5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	1.02 kg / 1018.0 g 10.0 N
1 mm	Stal (~0.2)	0.98 kg / 982.0 g 9.6 N
2 mm	Stal (~0.2)	0.93 kg / 932.0 g 9.1 N
3 mm	Stal (~0.2)	0.87 kg / 872.0 g 8.6 N
5 mm	Stal (~0.2)	0.73 kg / 734.0 g 7.2 N
10 mm	Stal (~0.2)	0.40 kg / 400.0 g 3.9 N
15 mm	Stal (~0.2)	0.19 kg / 188.0 g 1.8 N
20 mm	Stal (~0.2)	0.09 kg / 86.0 g 0.8 N
30 mm	Stal (~0.2)	0.02 kg / 20.0 g 0.2 N
50 mm	Stal (~0.2)	0.00 kg / 2.0 g 0.0 N

The following data indicates the estimated holding capacity needed to initiate the sliding of the magnet vertically along a vertical metal surface (considering standard friction). This parameter is relative to the separation distance between the magnet and the metal.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 38x3.5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.53 kg / 1527.0 g 15.0 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.02 kg / 1018.0 g 10.0 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.51 kg / 509.0 g 5.0 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	2.55 kg / 2545.0 g 25.0 N

When placing a element on a vertical plane (e.g., a fridge), it will maintain just about 1/5 of its nominal power. Gravity as well as a low friction coefficient mean that holders move down easier than they pull off. Designing a hanger? Note that the sliding force is significantly lower than the maximum static pull force. On a slippery surface, the element will give way down under a much lighter cargo. Using a rubber pad can significantly improve the result.

Table 4: Steel thickness (saturation) - sheet metal selection
MW 38x3.5 / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	10%	0.51 kg / 509.0 g 5.0 N
1 mm	25%	1.27 kg / 1272.5 g 12.5 N
2 mm	50%	2.55 kg / 2545.0 g 25.0 N
5 mm	100%	5.09 kg / 5090.0 g 49.9 N
10 mm	100%	5.09 kg / 5090.0 g 49.9 N

A thin sheet cannot take in the entire magnetic field, which squanders power of the holder. If you mount a strong magnet to a thin surface, the flux will pass right through and the pull force will drop sharply. To squeeze full efficiency of this magnet's power, you require a sufficiently solid element of metal. The material oversaturation means that on thin elements (e.g., appliance housings), the product works worse. We suggest choosing the steel thickness based on the following data.

Table 5: Thermal stability (stability) - thermal limit
MW 38x3.5 / N38

Ambient temp. (°C)	Power loss	Remaining pull	Status
20 °C	0.0%	5.09 kg / 5090.0 g 49.9 N	OK
40 °C	-2.2%	4.98 kg / 4978.0 g 48.8 N	OK
60 °C	-4.4%	4.87 kg / 4866.0 g 47.7 N
80 °C	-6.6%	4.75 kg / 4754.1 g 46.6 N
100 °C	-28.8%	3.62 kg / 3624.1 g 35.6 N

Standard neodymium magnets irreversibly lose strength past the thermal threshold. Protect against heat – excessive heat can permanently destroy this magnet. With increasing heat, the neodymium's force momentarily lowers. Avoid using this magnet close to ovens exceeding its working range. Too high temperature will cause irreversible degradation of magnetic properties.

*Technical advisory: Heat tolerance is determined by both grade, and the Permeance Coefficient Pc. Flat magnets (low permeance coefficient) risk losing magnetic properties at lower temperatures compared to rod magnets. Warning indicator in the table indicates permanent field degradation for this particular item.

Table 6: Two magnets (attraction) - field range
MW 38x3.5 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	5.09 kg / 5091 g 49.9 N 2 246 Gs	N/A
1 mm	4.91 kg / 4910 g 48.2 N 2 228 Gs	4.42 kg / 4419 g 43.4 N ~0 Gs
2 mm	4.66 kg / 4663 g 45.7 N 2 206 Gs	4.20 kg / 4197 g 41.2 N ~0 Gs
3 mm	4.36 kg / 4364 g 42.8 N 2 180 Gs	3.93 kg / 3928 g 38.5 N ~0 Gs
5 mm	3.67 kg / 3673 g 36.0 N 2 116 Gs	3.31 kg / 3306 g 32.4 N ~0 Gs
10 mm	2.00 kg / 1997 g 19.6 N 1 908 Gs	1.80 kg / 1797 g 17.6 N ~0 Gs
20 mm	0.43 kg / 430 g 4.2 N 1 407 Gs	0.39 kg / 387 g 3.8 N ~0 Gs
50 mm	0.01 kg / 9 g 0.1 N 445 Gs	0.00 kg / 0 g 0.0 N ~0 Gs

Two magnetic products interact from a much further distance than a magnet and steel combination. The setup of two magnets creates a more powerful interaction and a further horizon of operation. Want to build a strong closure? Apply two magnets instead of one magnet and a steel. Exercise caution that when attracting two neodymiums, the impact force is massive. The levitation is slightly lower than the attraction, but still large.
*The magnetic induction between like poles drops to ~0 Gs at the midpoint between the magnets (caused by magnetic field nullification).

Table 7: Protective zones (implants) - warnings
MW 38x3.5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	11.5 cm
Hearing aid	10 Gs (1.0 mT)	9.0 cm
Timepiece	20 Gs (2.0 mT)	7.0 cm
Mobile device	40 Gs (4.0 mT)	5.5 cm
Remote	50 Gs (5.0 mT)	5.0 cm
Payment card	400 Gs (40.0 mT)	2.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.5 cm

A strong magnetic field is a real danger to electronics as well as pacemakers. These magnets produce a flux that disrupts operation of digital equipment. Be aware: the invisible magnetic field passes through tissues and plastic. Special caution must be exercised by people with hearing aids and drug dispensers. Influence will be felt by: mechanical watches, remotes, membranes, and screens. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Collisions (cracking risk) - warning
MW 38x3.5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	16.10 km/h (4.47 m/s)	0.30 J
30 mm	23.11 km/h (6.42 m/s)	0.61 J
50 mm	29.52 km/h (8.20 m/s)	1.00 J
100 mm	41.70 km/h (11.58 m/s)	2.00 J

Magnetic elements are prone to chipping – a strong collision with metal can result in shattering. Watch the impact speed – a magnet released freely turns into a projectile. Impact energy can trigger coating fragments or painful pinches to fingers. Hold the magnet firmly during mounting so it doesn't slam with momentum against the metal. A collision at high speed means shattering of the magnet. Wear safety glasses when handling with powerful specimens.

Table 9: Corrosion resistance
MW 38x3.5 / 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 following table defines the conditions under which this product can be safely used. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Design data (Pc)
MW 38x3.5 / N38

Parameter	Value	Jedn. SI / Opis
Strumień (Flux)	17 022 Mx	170.2 µWb
Współczynnik Pc	0.14	Niski (Płaski)

Total magnetic flux emitted by the pole face. Key data for coil applications and sensors. Pc Factor determines the magnet operating point.

Table 11: Hydrostatics and buoyancy
MW 38x3.5 / N38

Environment	Effective steel pull	Effect
Air (land)	5.09 kg	Standard
Water (riverbed)	5.83 kg (+0.74 kg Buoyancy gain)	+14.5%

Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.

Water displaces steel, making heavy objects slightly lighter. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

Quick Unit Converter

Pulling Force

Newtons (N)

lbs

Magnetic Induction

Induction (Gs)

Induction (T)

Put a figure in a single field to see the conversion in the other units immediately.

UMP 75x25 [M10x3] GW F200 GOLD Lina / N42 - search holder

200.00 ZŁ brutto / pcs

Product available Ships tomorrow

LM TLN - 22 SQ / N38 - magnetic leviton

523.00 ZŁ brutto / pcs

Product available Ships tomorrow

MW 5x1 / N38 - cylindrical magnet

0.1845 ZŁ brutto / pcs

Product available Ships tomorrow

SM 25x375 [2xM8] / N52 - magnetic separator

1131.60 ZŁ brutto / pcs

This product is an exceptionally strong cylinder magnet, composed of advanced NdFeB material, which, with dimensions of Ø38x3.5 mm, guarantees maximum efficiency. The MW 38x3.5 / N38 component boasts high dimensional repeatability and professional build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 5.09 kg), this product is in stock from our warehouse in Poland, ensuring quick order fulfillment. Moreover, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.

It successfully proves itself in DIY projects, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 49.91 N with a weight of only 29.77 g, this rod is indispensable in miniature devices and wherever low weight is crucial.

Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks chipping the coating of this precision component. To ensure long-term durability in automation, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.

Magnets N38 are strong enough for 90% of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø38x3.5), 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 Ø38x3.5 mm, which, at a weight of 29.77 g, makes it an element with high magnetic energy density. The key parameter here is the holding force amounting to approximately 5.09 kg (force ~49.91 N), which, with such compact dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.

This rod magnet is magnetized axially (along the height of 3.5 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.

Apart from their consistent magnetism, neodymium magnets have these key benefits:

They retain magnetic properties for around 10 years – the drop is just ~1% (in theory),
Neodymium magnets are exceptionally resistant to loss of magnetic properties caused by external interference,
In other words, due to the shiny finish of silver, the element becomes visually attractive,
Magnetic induction on the surface of the magnet is impressive,
Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
Possibility of precise creating and adapting to specific needs,
Key role in advanced technology sectors – they are commonly used in HDD drives, electromotive mechanisms, advanced medical instruments, also complex engineering applications.
Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which allows their use in miniature devices

Characteristics of disadvantages of neodymium magnets: application proposals

They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only protects the magnet but also increases its resistance to damage
Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
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 prevent oxidation as well as corrosion.
Limited possibility of making nuts in the magnet and complex forms - recommended is cover - mounting mechanism.
Possible danger to health – tiny shards of magnets are risky, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Furthermore, tiny parts of these products are able to complicate diagnosis medical when they are in the body.
Due to complex production process, their price is higher than average,

Maximum magnetic pulling force – what affects it?

The declared magnet strength represents the maximum value, obtained under optimal environment, specifically:

on a block made of mild steel, perfectly concentrating the magnetic flux
possessing a thickness of min. 10 mm to avoid saturation
with a plane perfectly flat
under conditions of ideal adhesion (surface-to-surface)
during detachment in a direction vertical to the plane
at temperature room level

What influences lifting capacity in practice

It is worth knowing that the application force will differ subject to the following factors, in order of importance:

Air gap (between the magnet and the metal), as even a very small clearance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to varnish, rust or debris).
Loading method – catalog parameter refers to pulling vertically. When slipping, the magnet exhibits significantly lower power (often approx. 20-30% of maximum force).
Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
Plate material – mild steel gives the best results. Higher carbon content decrease magnetic permeability and holding force.
Surface finish – ideal contact is obtained only on smooth steel. Rough texture reduce the real contact area, weakening the magnet.
Thermal environment – heating the magnet causes a temporary drop of force. Check the thermal limit for a given model.

* Lifting capacity was assessed with the use of a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular detachment force, in contrast under attempts to slide the magnet the load capacity is reduced by as much as 75%. Moreover, even a slight gap {between} the magnet’s surface and the plate decreases the lifting capacity.

H&S for magnets

GPS and phone interference

GPS units and smartphones are highly sensitive to magnetism. Direct contact with a strong magnet can decalibrate the internal compass in your phone.

Do not give to children

Absolutely store magnets out of reach of children. Choking hazard is high, and the effects of magnets connecting inside the body are tragic.

Do not underestimate power

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

Fire warning

Fire warning: Rare earth powder is explosive. Do not process magnets without safety gear as this may cause fire.

Beware of splinters

Beware of splinters. Magnets can fracture upon violent connection, ejecting shards into the air. Eye protection is mandatory.

Allergy Warning

Nickel alert: The Ni-Cu-Ni coating contains nickel. If skin irritation occurs, immediately stop working with magnets and use protective gear.

Threat to electronics

Powerful magnetic fields can destroy records on payment cards, HDDs, and other magnetic media. Keep a distance of at least 10 cm.

Power loss in heat

Standard neodymium magnets (N-type) lose power when the temperature surpasses 80°C. The loss of strength is permanent.

Warning for heart patients

Medical warning: Strong magnets can deactivate pacemakers and defibrillators. Stay away if you have electronic implants.

Finger safety

Mind your fingers. Two large magnets will join immediately with a force of massive weight, crushing everything in their path. Exercise extreme caution!

Warning!

Looking for details? Check our post: Why are neodymium magnets dangerous?

MW 38x3.5 / N38 - cylindrical magnet

MW 38x3.5 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical analysis of the product - technical parameters

Pulling Force

Magnetic Induction

See also deals

UMP 75x25 [M10x3] GW F200 GOLD Lina / N42 - search holder

LM TLN - 22 SQ / N38 - magnetic leviton

MW 5x1 / N38 - cylindrical magnet

SM 25x375 [2xM8] / N52 - magnetic separator

Pros as well as cons of rare earth magnets.

Maximum magnetic pulling force – what affects it?

What influences lifting capacity in practice

H&S for magnets

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C