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MW 8x1.5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010101

GTIN: 5906301811008

5.00

Diameter Ø

8 mm [±0,1 mm]

Height

1.5 mm [±0,1 mm]

Weight

0.57 g

Magnetization Direction

↑ axial

Load capacity

0.74 kg / 7.27 N

Magnetic Induction

217.52 mT / 2175 Gs

Coating

[NiCuNi] Nickel

0.455 ZŁ with VAT / pcs + price for transport

0.370 ZŁ net + 23% VAT / pcs

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MW 8x1.5 / N38 - cylindrical magnet

Specification / characteristics MW 8x1.5 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010101
GTIN	5906301811008
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	8 mm [±0,1 mm]
Height	1.5 mm [±0,1 mm]
Weight	0.57 g
Magnetization Direction	↑ axial
Load capacity ~ ?	0.74 kg / 7.27 N
Magnetic Induction ~ ?	217.52 mT / 2175 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 8x1.5 / 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

Physical modeling of the assembly - data

Presented values constitute the result of a engineering calculation. Results rely on models for the class Nd₂Fe₁₄B. Actual performance may deviate from the simulation results. Please consider these data as a preliminary roadmap during assembly planning.

Table 1: Static pull force (pull vs gap) - characteristics
MW 8x1.5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	2174 Gs 217.4 mT	0.74 kg / 740.0 g 7.3 N	low risk
1 mm	1782 Gs 178.2 mT	0.50 kg / 497.3 g 4.9 N	low risk
2 mm	1310 Gs 131.0 mT	0.27 kg / 268.7 g 2.6 N	low risk
3 mm	914 Gs 91.4 mT	0.13 kg / 130.8 g 1.3 N	low risk
5 mm	439 Gs 43.9 mT	0.03 kg / 30.2 g 0.3 N	low risk
10 mm	99 Gs 9.9 mT	0.00 kg / 1.5 g 0.0 N	low risk
15 mm	35 Gs 3.5 mT	0.00 kg / 0.2 g 0.0 N	low risk
20 mm	16 Gs 1.6 mT	0.00 kg / 0.0 g 0.0 N	low risk
30 mm	5 Gs 0.5 mT	0.00 kg / 0.0 g 0.0 N	low risk
50 mm	1 Gs 0.1 mT	0.00 kg / 0.0 g 0.0 N	low risk

Pulling power drops significantly per each millimeter of gap. Keep in mind that every additional insulation layer (e.g., dirt, paint, rust) strongly reduces the pull force. Neodymiums operate optimally in perfect adhesion; gap weakens the power. Notice how flashily the load capacity fall, when the product does not touch directly to the metal substrate. When designing the arrangement, avoid additional spacers.

Table 2: Vertical Force (Wall)
MW 8x1.5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	0.15 kg / 148.0 g 1.5 N
1 mm	Stal (~0.2)	0.10 kg / 100.0 g 1.0 N
2 mm	Stal (~0.2)	0.05 kg / 54.0 g 0.5 N
3 mm	Stal (~0.2)	0.03 kg / 26.0 g 0.3 N
5 mm	Stal (~0.2)	0.01 kg / 6.0 g 0.1 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 defines the estimated shear load required to initiate the downward movement of the magnet downwards against a vertical steel wall (considering standard friction). This value varies with the gap size between the magnet and the surface.

Table 3: Vertical assembly (shearing) - vertical pull
MW 8x1.5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.22 kg / 222.0 g 2.2 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.15 kg / 148.0 g 1.5 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.07 kg / 74.0 g 0.7 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	0.37 kg / 370.0 g 3.6 N

When hanging a element on a vertical wall (e.g., a board), it will maintain just about 20%-30% of its nominal power. Gravitational force and a low friction coefficient mean that magnets slip faster than they pull off. Planning a hanger? Note that the shear force is significantly lower than the maximum static pull force. On a smooth steel, the element will slip down under a much lighter load. Utilizing a rubberized coating can drastically improve the result.

Table 4: Steel thickness (saturation) - sheet metal selection
MW 8x1.5 / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	10%	0.07 kg / 74.0 g 0.7 N
1 mm	25%	0.19 kg / 185.0 g 1.8 N
2 mm	50%	0.37 kg / 370.0 g 3.6 N
5 mm	100%	0.74 kg / 740.0 g 7.3 N
10 mm	100%	0.74 kg / 740.0 g 7.3 N

A thin sheet is not enough to focus the full magnetic flux, which weakens actual performance of the magnet. If you attach a powerful product to a too thin substrate, the flux will penetrate right through and the pull force will drop sharply. To utilize 100% of this neodymium's power, you need a suitably thick piece of steel. The material oversaturation means that on thin elements (e.g., car bodies), the holder works worse. We recommend selecting the steel dimension based on the following data.

Table 5: Thermal stability (stability) - thermal limit
MW 8x1.5 / N38

Ambient temp. (°C)	Power loss	Remaining pull	Status
20 °C	0.0%	0.74 kg / 740.0 g 7.3 N	OK
40 °C	-2.2%	0.72 kg / 723.7 g 7.1 N	OK
60 °C	-4.4%	0.71 kg / 707.4 g 6.9 N
80 °C	-6.6%	0.69 kg / 691.2 g 6.8 N
100 °C	-28.8%	0.53 kg / 526.9 g 5.2 N

Classic neodymiums irreversibly lose parameters above the temperature limit. Avoid high temperatures – excessive heat can permanently destroy this magnet. As the temperature rises, the magnet's power temporarily drops. Refrain from using this product close to ovens exceeding its working range. Exceeding the critical threshold will result in irreversible degradation of magnetic properties.

*Technical advisory: Temperature resistance is determined by both grade, and the Permeance Coefficient Pc. Thin magnets (low Pc) risk losing magnetic properties at lower temperatures than taller cylinders. Warning indicator in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (attraction) - field collision
MW 8x1.5 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	1.46 kg / 1465 g 14.4 N 3 712 Gs	N/A
1 mm	1.24 kg / 1244 g 12.2 N 4 007 Gs	1.12 kg / 1120 g 11.0 N ~0 Gs
2 mm	0.98 kg / 984 g 9.7 N 3 565 Gs	0.89 kg / 886 g 8.7 N ~0 Gs
3 mm	0.74 kg / 738 g 7.2 N 3 086 Gs	0.66 kg / 664 g 6.5 N ~0 Gs
5 mm	0.37 kg / 374 g 3.7 N 2 196 Gs	0.34 kg / 336 g 3.3 N ~0 Gs
10 mm	0.06 kg / 60 g 0.6 N 878 Gs	0.05 kg / 54 g 0.5 N ~0 Gs
20 mm	0.00 kg / 3 g 0.0 N 199 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 magnetic products attract each other from a significantly greater distance than a magnet and sheet setup. The setup of two magnets generates a stronger field and a further horizon of operation. Designing a strong closure? Apply two magnets instead of one magnet and a striker plate. Remember that when attracting two neodymiums, the collision energy is huge. The repulsion force is slightly lower than the attraction, but still large.
*Field value in repulsion mode reaches ~0 Gs at the geometric center of the gap (resulting from vector opposition).

Table 7: Safety (HSE) (electronics) - precautionary measures
MW 8x1.5 / 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
Mechanical watch	20 Gs (2.0 mT)	2.0 cm
Phone / Smartphone	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

Powerful magnet radiation is a real danger to IT equipment as well as pacemakers. These NdFeB products generate a flux that prevents correct functioning of digital equipment. Be aware: the unseen radiation passes through tissues and plastic. Special caution must be taken by people with hearing aids and insulin pumps. The risk also applies to: mechanical watches, car keys, membranes, and displays. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - warning
MW 8x1.5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	36.39 km/h (10.11 m/s)	0.03 J
30 mm	62.94 km/h (17.48 m/s)	0.09 J
50 mm	81.25 km/h (22.57 m/s)	0.15 J
100 mm	114.91 km/h (31.92 m/s)	0.29 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 cause material chips or injury to fingers. Be sure to control the product during installation so it doesn't slam with momentum against the metal. A collision at high speed almost guarantees destruction of the neodymium. Use safety goggles when handling with large magnets.

Table 9: Coating parameters (durability)
MW 8x1.5 / 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)

Neodymium magnets are highly susceptible to corrosion without proper protection. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Design data (Pc)
MW 8x1.5 / N38

Parameter	Value	Jedn. SI / Opis
Strumień (Flux)	1 285 Mx	12.9 µWb
Współczynnik Pc	0.27	Niski (Płaski)

Total magnetic flux emitted by the pole face. Key data for generator builders and Hall effect devices. Pc Factor determines the working geometry.

Table 11: Submerged application
MW 8x1.5 / N38

Environment	Effective steel pull	Effect
Air (land)	0.74 kg	Standard
Water (riverbed)	0.85 kg (+0.11 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!

Water displaces steel, making heavy objects slightly lighter. Buoyancy helps in lifting finds.

1. Wall mount (shear)

*Warning: On a vertical wall, the magnet holds merely ~20% of its nominal pull.

2. Plate thickness effect

*Thin steel (e.g. computer case) severely limits the holding force.

3. Heat tolerance

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

Quick Unit Converter

Pulling Force

Force in kg

Force (N)

Force in lbs

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The presented product is an extremely powerful cylindrical magnet, composed of durable NdFeB material, which, with dimensions of Ø8x1.5 mm, guarantees maximum efficiency. This specific item boasts a tolerance of ±0.1mm and industrial build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 0.74 kg), this product is in stock from our European logistics center, ensuring quick order fulfillment. Moreover, its Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.

This model is created for building generators, advanced sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the high power of 7.27 N with a weight of only 0.57 g, this cylindrical magnet is indispensable in electronics and wherever every gram matters.

Due to the delicate structure of the ceramic sinter, 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 are safe for nickel and fill the gap, guaranteeing durability of the connection.

Grade N38 is the most popular standard for industrial neodymium magnets, offering a great economic balance and operational stability. If you need the strongest magnets in the same volume (Ø8x1.5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.

The presented product is a neodymium magnet with precisely defined parameters: diameter 8 mm and height 1.5 mm. The key parameter here is the lifting capacity amounting to approximately 0.74 kg (force ~7.27 N), which, with such compact dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against oxidation, 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 8 mm. 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.

Advantages as well as disadvantages of neodymium magnets.

Strengths

Apart from their notable magnetic energy, neodymium magnets have these key benefits:

They have constant strength, and over around ten years their performance decreases symbolically – ~1% (in testing),
They have excellent resistance to weakening of magnetic properties due to external fields,
Thanks to the metallic finish, the layer of Ni-Cu-Ni, gold, or silver gives an visually attractive appearance,
Magnetic induction on the surface of the magnet remains maximum,
Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
Thanks to modularity in constructing and the ability to modify to individual projects,
Universal use in electronics industry – they serve a role in magnetic memories, drive modules, precision medical tools, also industrial machines.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which allows their use in compact constructions

Weaknesses

Cons of neodymium magnets: weaknesses and usage proposals

At very strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as 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 recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
We recommend a housing - magnetic mechanism, due to difficulties in creating threads inside the magnet and complex forms.
Health risk resulting from small fragments of magnets are risky, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, tiny parts of these products are able to be problematic in diagnostics medical in case of swallowing.
Due to expensive raw materials, their price is higher than average,

Holding force characteristics

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

The force parameter is a measurement result performed under the following configuration:

on a plate made of mild steel, perfectly concentrating the magnetic field
possessing a thickness of minimum 10 mm to ensure full flux closure
characterized by smoothness
without any clearance between the magnet and steel
under axial force direction (90-degree angle)
in neutral thermal conditions

Determinants of lifting force in real conditions

It is worth knowing that the application force will differ depending on elements below, starting with the most relevant:

Distance – existence of foreign body (rust, tape, gap) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
Direction of force – highest force is reached only during pulling at a 90° angle. The shear force of the magnet along the plate is typically many times lower (approx. 1/5 of the lifting capacity).
Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of generating force.
Steel type – low-carbon steel attracts best. Higher carbon content decrease magnetic properties and lifting capacity.
Surface condition – smooth surfaces guarantee perfect abutment, which improves field saturation. Uneven metal reduce efficiency.
Operating temperature – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under attempts to slide the magnet the load capacity is reduced by as much as 75%. Additionally, even a slight gap between the magnet and the plate lowers the load capacity.

Precautions when working with NdFeB magnets

Electronic hazard

Data protection: Strong magnets can damage data carriers and delicate electronics (heart implants, hearing aids, mechanical watches).

Life threat

Patients with a heart stimulator should keep an absolute distance from magnets. The magnetic field can disrupt the functioning of the implant.

Maximum temperature

Keep cool. NdFeB magnets are susceptible to heat. If you need resistance above 80°C, ask us about HT versions (H, SH, UH).

Dust is flammable

Powder generated during grinding of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.

GPS and phone interference

Be aware: rare earth magnets generate a field that disrupts sensitive sensors. Keep a safe distance from your phone, tablet, and navigation systems.

Beware of splinters

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

Bodily injuries

Risk of injury: The attraction force is so immense that it can result in blood blisters, crushing, and broken bones. Use thick gloves.

Handling guide

Exercise caution. Neodymium magnets attract from a long distance and connect with huge force, often faster than you can react.

Metal Allergy

Studies show that nickel (standard magnet coating) is a common allergen. For allergy sufferers, refrain from touching magnets with bare hands or select versions in plastic housing.

Keep away from children

Always store magnets away from children. Ingestion danger is significant, and the effects of magnets connecting inside the body are very dangerous.

Danger! Looking for details? Read our article: Why are neodymium magnets dangerous?

MW 8x1.5 / N38 - cylindrical magnet

Hunting for a discount?

MW 8x1.5 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the assembly - data

1. Wall mount (shear)

2. Plate thickness effect

3. Heat tolerance

Pulling Force

Magnetic Induction

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MP 20x8x6 / N38 - ring magnet

MW 10x10 / N38 - cylindrical magnet

SM 32x375 [2xM8] / N42 - magnetic separator

SM 32x175 [2xM8] / N52 - magnetic separator

Advantages as well as disadvantages of neodymium magnets.

Strengths

Weaknesses

Holding force characteristics

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

Determinants of lifting force in real conditions

Electronic hazard

Life threat

Maximum temperature

Dust is flammable

GPS and phone interference

Beware of splinters

Bodily injuries

Handling guide

Metal Allergy

Keep away from children

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C