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MW 40x8 / 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: PLN 1-6500
Rating: 5

cylindrical magnet

Catalog no 010069

GTIN/EAN: 5906301810681

5.00

Diameter Ø

40 mm [±0,1 mm]

Height

8 mm [±0,1 mm]

Weight

75.4 g

Magnetization Direction

↑ axial

Load capacity

20.43 kg / 200.39 N

Magnetic Induction

230.22 mT / 2302 Gs

Coating

[NiCuNi] Nickel

check technical data »

31.27 ZŁ with VAT / pcs + price for transport

25.42 ZŁ net + 23% VAT / pcs

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Technical specification - MW 40x8 / N38 - cylindrical magnet

Specification / characteristics - MW 40x8 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010069
GTIN/EAN	5906301810681
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	40 mm [±0,1 mm]
Height	8 mm [±0,1 mm]
Weight	75.4 g
Magnetization Direction	↑ axial
Load capacity ~ ?	20.43 kg / 200.39 N
Magnetic Induction ~ ?	230.22 mT / 2302 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 40x8 / 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 simulation of the assembly - report

The following values are the outcome of a engineering calculation. Results were calculated on algorithms for the class Nd₂Fe₁₄B. Actual performance may differ. Please consider these calculations as a preliminary roadmap for designers.

Table 1: Static force (pull vs gap) - interaction chart
MW 40x8 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2302 Gs 230.2 mT	20.43 kg / 45.04 pounds 20430.0 g / 200.4 N	dangerous!
1 mm	2235 Gs 223.5 mT	19.25 kg / 42.44 pounds 19252.0 g / 188.9 N	dangerous!
2 mm	2156 Gs 215.6 mT	17.92 kg / 39.50 pounds 17917.4 g / 175.8 N	dangerous!
3 mm	2068 Gs 206.8 mT	16.49 kg / 36.36 pounds 16490.6 g / 161.8 N	dangerous!
5 mm	1875 Gs 187.5 mT	13.56 kg / 29.89 pounds 13556.7 g / 133.0 N	dangerous!
10 mm	1375 Gs 137.5 mT	7.29 kg / 16.07 pounds 7287.4 g / 71.5 N	warning
15 mm	959 Gs 95.9 mT	3.54 kg / 7.81 pounds 3542.3 g / 34.8 N	warning
20 mm	661 Gs 66.1 mT	1.68 kg / 3.71 pounds 1684.9 g / 16.5 N	low risk
30 mm	328 Gs 32.8 mT	0.41 kg / 0.91 pounds 414.2 g / 4.1 N	low risk
50 mm	105 Gs 10.5 mT	0.04 kg / 0.09 pounds 42.3 g / 0.4 N	low risk

Grip strength drops significantly per each millimeter of distance. Remember that even the smallest gap (e.g., contamination, paint, dust) significantly weakens the grip. Magnets operate most effectively during direct contact; air break weakens the power. Notice how rapidly the parameters drop, when the magnet does not touch flatly to the steel surface. When designing the assembly, discard additional spacers.

Table 2: Vertical force (wall)
MW 40x8 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	4.09 kg / 9.01 pounds 4086.0 g / 40.1 N
1 mm	Stal (~0.2)	3.85 kg / 8.49 pounds 3850.0 g / 37.8 N
2 mm	Stal (~0.2)	3.58 kg / 7.90 pounds 3584.0 g / 35.2 N
3 mm	Stal (~0.2)	3.30 kg / 7.27 pounds 3298.0 g / 32.4 N
5 mm	Stal (~0.2)	2.71 kg / 5.98 pounds 2712.0 g / 26.6 N
10 mm	Stal (~0.2)	1.46 kg / 3.21 pounds 1458.0 g / 14.3 N
15 mm	Stal (~0.2)	0.71 kg / 1.56 pounds 708.0 g / 6.9 N
20 mm	Stal (~0.2)	0.34 kg / 0.74 pounds 336.0 g / 3.3 N
30 mm	Stal (~0.2)	0.08 kg / 0.18 pounds 82.0 g / 0.8 N
50 mm	Stal (~0.2)	0.01 kg / 0.02 pounds 8.0 g / 0.1 N

The following data indicates the theoretical holding capacity necessary to cause the sliding of the magnet vertically on a upright steel wall (considering typical friction). This parameter depends on the air gap between the magnet and the surface.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 40x8 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	6.13 kg / 13.51 pounds 6129.0 g / 60.1 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	4.09 kg / 9.01 pounds 4086.0 g / 40.1 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	2.04 kg / 4.50 pounds 2043.0 g / 20.0 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	10.22 kg / 22.52 pounds 10215.0 g / 100.2 N

When hanging a magnet on a vertical wall (e.g., a board), it you can count on just approx. 20%-30% of its nominal power. Gravity and a low friction coefficient cause that products slip faster than they detach. Planning a hanger? Note that the sliding force is significantly lower than the perpendicular breakaway force. On a slippery surface, the element will give way down under a significantly smaller load. Using a rubber coating can effectively increase the grip.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 40x8 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	5%	1.02 kg / 2.25 pounds 1021.5 g / 10.0 N
1 mm	13%	2.55 kg / 5.63 pounds 2553.8 g / 25.1 N
2 mm	25%	5.11 kg / 11.26 pounds 5107.5 g / 50.1 N
3 mm	38%	7.66 kg / 16.89 pounds 7661.3 g / 75.2 N
5 mm	63%	12.77 kg / 28.15 pounds 12768.8 g / 125.3 N
10 mm	100%	20.43 kg / 45.04 pounds 20430.0 g / 200.4 N
11 mm	100%	20.43 kg / 45.04 pounds 20430.0 g / 200.4 N
12 mm	100%	20.43 kg / 45.04 pounds 20430.0 g / 200.4 N

A too thin steel is incapable of absorb the full magnetic flux, which weakens actual performance of the magnet. Should you mount a strong magnet to a weak sheet, the magnetism will pass right through and the pull force will drop sharply. To achieve 100% of this magnet's power, you require a sufficiently solid element of metal. The saturation effect means that on delicate walls (e.g., thin profiles), the magnet shows lower pull force. We advise picking the steel thickness from these parameters.

Table 5: Working in heat (stability) - power drop
MW 40x8 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	20.43 kg / 45.04 pounds 20430.0 g / 200.4 N	OK
40 °C	-2.2%	19.98 kg / 44.05 pounds 19980.5 g / 196.0 N	OK
60 °C	-4.4%	19.53 kg / 43.06 pounds 19531.1 g / 191.6 N
80 °C	-6.6%	19.08 kg / 42.07 pounds 19081.6 g / 187.2 N
100 °C	-28.8%	14.55 kg / 32.07 pounds 14546.2 g / 142.7 N

Classic neodymiums lose strength after exceeding the maximum temperature. Watch out for overheating – high temperature can permanently damage this product. With every degree above norm, the magnet's power temporarily decreases. Refrain from using this magnet in hot environments exceeding its working range. Too high temperature will lead to permanent loss of magnetic properties.

*Engineering note: Temperature resistance depends not only on the material grade, as well as the dimension ratios. Low-profile magnets (low permeance coefficient) may lose charge permanently sooner compared to rod magnets. Red status in the table signals permanent field degradation for this particular item.

Table 6: Two magnets (attraction) - field collision
MW 40x8 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	41.05 kg / 90.51 pounds 3 871 Gs	6.16 kg / 13.58 pounds 6158 g / 60.4 N	N/A
1 mm	39.92 kg / 88.02 pounds 4 540 Gs	5.99 kg / 13.20 pounds 5989 g / 58.7 N	35.93 kg / 79.22 pounds ~0 Gs
2 mm	38.69 kg / 85.29 pounds 4 469 Gs	5.80 kg / 12.79 pounds 5803 g / 56.9 N	34.82 kg / 76.76 pounds ~0 Gs
3 mm	37.38 kg / 82.40 pounds 4 393 Gs	5.61 kg / 12.36 pounds 5606 g / 55.0 N	33.64 kg / 74.16 pounds ~0 Gs
5 mm	34.59 kg / 76.25 pounds 4 226 Gs	5.19 kg / 11.44 pounds 5188 g / 50.9 N	31.13 kg / 68.63 pounds ~0 Gs
10 mm	27.24 kg / 60.06 pounds 3 750 Gs	4.09 kg / 9.01 pounds 4086 g / 40.1 N	24.52 kg / 54.05 pounds ~0 Gs
20 mm	14.64 kg / 32.28 pounds 2 750 Gs	2.20 kg / 4.84 pounds 2197 g / 21.5 N	13.18 kg / 29.06 pounds ~0 Gs
50 mm	1.65 kg / 3.63 pounds 922 Gs	0.25 kg / 0.54 pounds 247 g / 2.4 N	1.48 kg / 3.26 pounds ~0 Gs
60 mm	0.83 kg / 1.84 pounds 656 Gs	0.12 kg / 0.28 pounds 125 g / 1.2 N	0.75 kg / 1.65 pounds ~0 Gs
70 mm	0.44 kg / 0.97 pounds 477 Gs	0.07 kg / 0.15 pounds 66 g / 0.6 N	0.40 kg / 0.87 pounds ~0 Gs
80 mm	0.24 kg / 0.54 pounds 355 Gs	0.04 kg / 0.08 pounds 37 g / 0.4 N	0.22 kg / 0.49 pounds ~0 Gs
90 mm	0.14 kg / 0.31 pounds 270 Gs	0.02 kg / 0.05 pounds 21 g / 0.2 N	0.13 kg / 0.28 pounds ~0 Gs
100 mm	0.09 kg / 0.19 pounds 210 Gs	0.01 kg / 0.03 pounds 13 g / 0.1 N	0.08 kg / 0.17 pounds ~0 Gs

Two magnets attract each other from a significantly greater distance than a neodymium and metal combination. The setup of magnet-to-magnet produces a massive flux and a larger range of action. Designing a solid fastener? Apply two magnets instead of a neodymium and a steel. Be careful that when connecting a pair of magnets, the pinch force is huge. The repulsion force is marginally weaker than the connection force, but still large.
*Field value between like poles reaches ~0 Gs at the geometric center of the gap (caused by magnetic field nullification).
Note: Calculations apply to sliding force of two same magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Protective zones (implants) - warnings
MW 40x8 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	15.5 cm
Hearing aid	10 Gs (1.0 mT)	12.5 cm
Timepiece	20 Gs (2.0 mT)	9.5 cm
Mobile device	40 Gs (4.0 mT)	7.5 cm
Car key	50 Gs (5.0 mT)	7.0 cm
Payment card	400 Gs (40.0 mT)	3.0 cm
HDD hard drive	600 Gs (60.0 mT)	2.5 cm

Powerful magnet radiation poses a serious hazard to electronic devices as well as medical implants. These NdFeB products generate a flux that destroys function of digital equipment. Be aware: the invisible magnetic field acts through matter and housings. Special caution must be taken by people with cochlear implants and insulin pumps. Also at risk are: mechanical watches, car keys, membranes, and screens. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - warning
MW 40x8 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	19.96 km/h (5.54 m/s)	1.16 J
30 mm	29.12 km/h (8.09 m/s)	2.47 J
50 mm	37.17 km/h (10.32 m/s)	4.02 J
100 mm	52.50 km/h (14.58 m/s)	8.02 J

Neodymium magnets are prone to chipping – a collision with steel risks their cracking. Control the attraction moment – a magnet released freely becomes dangerous. Striking energy can cause material chips or injury to fingers. Always hold the magnet 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 magnet. Use safety goggles when handling with powerful specimens.

Table 9: Corrosion resistance
MW 40x8 / 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)

For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Note the thickness of the protective layer.

Table 10: Construction data (Flux)
MW 40x8 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	33 553 Mx	335.5 µWb
P_c Coefficient	0.29	Low (Flat)

Flux value emitted by the magnet pole. Key data in coil applications and motors. P_c value determines the working geometry.

Table 11: Submerged application
MW 40x8 / N38

Environment	Effective steel pull	Effect
Air (land)	20.43 kg	Standard
Water (riverbed)	23.39 kg (+2.96 kg buoyancy gain)	+14.5%

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. 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 a fraction of its max power.

2. Steel saturation

*Thin steel (e.g. computer case) significantly reduces the holding force.

3. Temperature resistance

*For standard magnets, 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) = 0.29

The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. 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%

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: 010069-2026

Magnet Unit Converter

Force (pull)

Force in lbs

Magnetic Induction

Gauss (Gs)

Induction (T)

Type a number into a field, and the rest will recalculate on the fly.

UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread

23.99 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

MPL 40x10x5x2[7/3.5] / N38 - lamellar magnet

9.93 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

MW 2x4 / N38 - cylindrical magnet

0.209 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

MW 4x6 / N38 - cylindrical magnet

0.381 ZŁ brutto / pcs

This product is an incredibly powerful cylinder magnet, composed of modern NdFeB material, which, at dimensions of Ø40x8 mm, guarantees the highest energy density. This specific item boasts high dimensional repeatability and industrial build quality, making it a perfect solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 20.43 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.

It finds application in DIY projects, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 200.39 N with a weight of only 75.4 g, this rod is indispensable in miniature devices and wherever low weight is crucial.

Due to the delicate structure of the ceramic sinter, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this precision component. To ensure stability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.

Grade N38 is the most popular standard for professional neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø40x8), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.

This model is characterized by dimensions Ø40x8 mm, which, at a weight of 75.4 g, makes it an element with high magnetic energy density. The value of 200.39 N means that the magnet is capable of holding a weight many times exceeding its own mass of 75.4 g. 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 8 mm), which means that the N and S poles are located on the flat, circular surfaces. 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 diametrically if your project requires it.

Advantages as well as disadvantages of neodymium magnets.

Benefits

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

Their strength remains stable, and after approximately ten years it decreases only by ~1% (according to research),
They possess excellent resistance to magnetism drop as a result of external magnetic sources,
The use of an shiny coating of noble metals (nickel, gold, silver) causes the element to present itself better,
The surface of neodymium magnets generates a concentrated magnetic field – this is a distinguishing feature,
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...
In view of the possibility of precise forming and adaptation to unique needs, neodymium magnets can be created in a variety of forms and dimensions, which increases their versatility,
Huge importance in innovative solutions – they find application in hard drives, motor assemblies, advanced medical instruments, and technologically advanced constructions.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Limitations

Characteristics of disadvantages of neodymium magnets: application proposals

At strong impacts they can break, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's 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 very resistant to heat
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 suggest a housing - magnetic holder, due to difficulties in realizing nuts inside the magnet and complex forms.
Potential hazard to health – tiny shards of magnets can be dangerous, in case of ingestion, which gains importance in the aspect of protecting the youngest. Additionally, tiny parts of these products are able to disrupt the diagnostic process medical after entering the body.
Due to neodymium price, their price is higher than average,

Holding force characteristics

Detachment force of the magnet in optimal conditions – what affects it?

The load parameter shown refers to the limit force, measured under ideal test conditions, specifically:

on a block made of structural steel, perfectly concentrating the magnetic flux
whose transverse dimension equals approx. 10 mm
with a plane perfectly flat
with zero gap (without coatings)
for force applied at a right angle (in the magnet axis)
at conditions approx. 20°C

Determinants of practical lifting force of a magnet

Holding efficiency is influenced by working environment parameters, mainly (from priority):

Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or dirt) diminishes the pulling force, often by half at just 0.5 mm.
Pull-off angle – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the maximum value.
Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
Material composition – different alloys reacts the same. Alloy additives worsen the interaction with the magnet.
Surface condition – smooth surfaces ensure maximum contact, which increases field saturation. Uneven metal weaken the grip.
Temperature – heating the magnet causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, in contrast under shearing force the load capacity is reduced by as much as 75%. Additionally, even a minimal clearance between the magnet and the plate decreases the lifting capacity.

Safety rules for work with neodymium magnets

Pinching danger

Big blocks can crush fingers instantly. Never place your hand betwixt two attracting surfaces.

Pacemakers

Warning for patients: Powerful magnets affect medical devices. Keep minimum 30 cm distance or ask another person to work with the magnets.

GPS Danger

A strong magnetic field interferes with the operation of magnetometers in smartphones and navigation systems. Maintain magnets near a smartphone to avoid breaking the sensors.

Risk of cracking

NdFeB magnets are sintered ceramics, meaning they are very brittle. Collision of two magnets will cause them shattering into small pieces.

Demagnetization risk

Control the heat. Exposing the magnet to high heat will permanently weaken its properties and strength.

Keep away from children

Always keep magnets out of reach of children. Choking hazard is high, and the consequences of magnets clamping inside the body are tragic.

Avoid contact if allergic

Certain individuals suffer from a contact allergy to Ni, which is the standard coating for NdFeB magnets. Prolonged contact might lead to an allergic reaction. We strongly advise use safety gloves.

Immense force

Exercise caution. Neodymium magnets attract from a long distance and snap with huge force, often quicker than you can move away.

Safe distance

Do not bring magnets near a wallet, computer, or screen. The magnetism can permanently damage these devices and erase data from cards.

Combustion hazard

Fire warning: Rare earth powder is explosive. Avoid machining magnets in home conditions as this may cause fire.

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

MW 40x8 / N38 - cylindrical magnet

Technical specification - MW 40x8 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering simulation of the assembly - report

Table 1: Static force (pull vs gap) - interaction chart MW 40x8 / N38

Table 2: Vertical force (wall) MW 40x8 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces MW 40x8 / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection MW 40x8 / N38

Table 5: Working in heat (stability) - power drop MW 40x8 / N38

Table 6: Two magnets (attraction) - field collision MW 40x8 / N38

Table 7: Protective zones (implants) - warnings MW 40x8 / N38

Table 8: Collisions (kinetic energy) - warning MW 40x8 / N38

Table 9: Corrosion resistance MW 40x8 / N38

Table 10: Construction data (Flux) MW 40x8 / N38

Table 11: Submerged application MW 40x8 / N38

1. Vertical hold

2. Steel saturation

3. Temperature resistance

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

Elemental analysis

Sustainability

Force (pull)

Magnetic Induction

See also proposals

UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread

MPL 40x10x5x2[7/3.5] / N38 - lamellar magnet

MW 2x4 / N38 - cylindrical magnet

MW 4x6 / N38 - cylindrical magnet

Advantages as well as disadvantages of neodymium magnets.

Benefits

Limitations

Holding force characteristics

Detachment force of the magnet in optimal conditions – what affects it?

Determinants of practical lifting force of a magnet

Safety rules for work with neodymium magnets

Pinching danger

Pacemakers

GPS Danger

Risk of cracking

Demagnetization risk

Keep away from children

Avoid contact if allergic

Immense force

Safe distance

Combustion hazard

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs gap) - interaction chart
MW 40x8 / N38

Table 2: Vertical force (wall)
MW 40x8 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 40x8 / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 40x8 / N38

Table 5: Working in heat (stability) - power drop
MW 40x8 / N38

Table 6: Two magnets (attraction) - field collision
MW 40x8 / N38

Table 7: Protective zones (implants) - warnings
MW 40x8 / N38

Table 8: Collisions (kinetic energy) - warning
MW 40x8 / N38

Table 9: Corrosion resistance
MW 40x8 / N38

Table 10: Construction data (Flux)
MW 40x8 / N38

Table 11: Submerged application
MW 40x8 / N38