Product on order Ships in 3-5 days

MW 40x30 / 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 010068

GTIN/EAN: 5906301810674

5.00

Diameter Ø

40 mm [±0,1 mm]

Height

30 mm [±0,1 mm]

Weight

282.74 g

Magnetization Direction

→ diametrical

Load capacity

54.73 kg / 536.88 N

Magnetic Induction

515.71 mT / 5157 Gs

Coating

[NiCuNi] Nickel

technical parameters »

104.80 ZŁ with VAT / pcs + price for transport

85.20 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

85.20 ZŁ

104.80 ZŁ

price from 10 pcs

80.09 ZŁ

98.51 ZŁ

price from 30 pcs

74.98 ZŁ

92.22 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Not sure about your choice?

Contact us by phone +48 888 99 98 98 or send us a note using form the contact section.
Lifting power along with shape of neodymium magnets can be tested on our force calculator.

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

Product card - MW 40x30 / N38 - cylindrical magnet

Specification / characteristics - MW 40x30 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010068
GTIN/EAN	5906301810674
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	30 mm [±0,1 mm]
Weight	282.74 g
Magnetization Direction	→ diametrical
Load capacity ~ ?	54.73 kg / 536.88 N
Magnetic Induction ~ ?	515.71 mT / 5157 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 40x30 / 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

The following data represent the outcome of a physical simulation. Values were calculated on models for the material Nd₂Fe₁₄B. Operational performance may differ from theoretical values. Treat these data as a supplementary guide when designing systems.

Table 1: Static pull force (force vs distance) - interaction chart
MW 40x30 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5156 Gs 515.6 mT	54.73 kg / 120.66 LBS 54730.0 g / 536.9 N	critical level
1 mm	4900 Gs 490.0 mT	49.43 kg / 108.98 LBS 49432.0 g / 484.9 N	critical level
2 mm	4641 Gs 464.1 mT	44.33 kg / 97.74 LBS 44334.0 g / 434.9 N	critical level
3 mm	4383 Gs 438.3 mT	39.54 kg / 87.17 LBS 39538.7 g / 387.9 N	critical level
5 mm	3879 Gs 387.9 mT	30.98 kg / 68.30 LBS 30981.5 g / 303.9 N	critical level
10 mm	2773 Gs 277.3 mT	15.83 kg / 34.89 LBS 15826.7 g / 155.3 N	critical level
15 mm	1946 Gs 194.6 mT	7.79 kg / 17.18 LBS 7792.9 g / 76.4 N	medium risk
20 mm	1372 Gs 137.2 mT	3.88 kg / 8.55 LBS 3877.9 g / 38.0 N	medium risk
30 mm	723 Gs 72.3 mT	1.08 kg / 2.37 LBS 1076.5 g / 10.6 N	low risk
50 mm	258 Gs 25.8 mT	0.14 kg / 0.30 LBS 137.4 g / 1.3 N	low risk

Grip strength decreases significantly with every subsequent millimeter of distance. Remember that every additional insulation layer (e.g., contamination, varnish, dust) noticeably reduces the pull force. Neodymiums operate most effectively in perfect adhesion; distance nullifies the force. Observe how quickly the parameters fall, when the product does not touch directly to the metal substrate. When planning the mounting, discard additional spacers.

Table 2: Vertical hold (wall)
MW 40x30 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	10.95 kg / 24.13 LBS 10946.0 g / 107.4 N
1 mm	Stal (~0.2)	9.89 kg / 21.79 LBS 9886.0 g / 97.0 N
2 mm	Stal (~0.2)	8.87 kg / 19.55 LBS 8866.0 g / 87.0 N
3 mm	Stal (~0.2)	7.91 kg / 17.43 LBS 7908.0 g / 77.6 N
5 mm	Stal (~0.2)	6.20 kg / 13.66 LBS 6196.0 g / 60.8 N
10 mm	Stal (~0.2)	3.17 kg / 6.98 LBS 3166.0 g / 31.1 N
15 mm	Stal (~0.2)	1.56 kg / 3.43 LBS 1558.0 g / 15.3 N
20 mm	Stal (~0.2)	0.78 kg / 1.71 LBS 776.0 g / 7.6 N
30 mm	Stal (~0.2)	0.22 kg / 0.48 LBS 216.0 g / 2.1 N
50 mm	Stal (~0.2)	0.03 kg / 0.06 LBS 28.0 g / 0.3 N

This section calculates the approximate weight limit necessary to cause the downward movement of the magnet down against a upright metal surface (assuming standard friction coefficient). This value is relative to the air gap between the magnet and the metal.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 40x30 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	16.42 kg / 36.20 LBS 16419.0 g / 161.1 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	10.95 kg / 24.13 LBS 10946.0 g / 107.4 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	5.47 kg / 12.07 LBS 5473.0 g / 53.7 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	27.37 kg / 60.33 LBS 27365.0 g / 268.5 N

When hanging a holder on a upright plane (e.g., a car body), it will maintain only about 20%-30% of nominal attraction strength. Gravitational force as well as a weak degree of grip mean that products move down faster than they pop off the substrate. Planning a wall mount? Remember that the shear force is much weaker than the perpendicular breakaway force. On a smooth steel, the holder will slide down under a noticeably lighter cargo. Utilizing a rubberized layer can drastically increase the grip.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 40x30 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	3%	1.82 kg / 4.02 LBS 1824.3 g / 17.9 N
1 mm	8%	4.56 kg / 10.05 LBS 4560.8 g / 44.7 N
2 mm	17%	9.12 kg / 20.11 LBS 9121.7 g / 89.5 N
3 mm	25%	13.68 kg / 30.16 LBS 13682.5 g / 134.2 N
5 mm	42%	22.80 kg / 50.27 LBS 22804.2 g / 223.7 N
10 mm	83%	45.61 kg / 100.55 LBS 45608.3 g / 447.4 N
11 mm	92%	50.17 kg / 110.60 LBS 50169.2 g / 492.2 N
12 mm	100%	54.73 kg / 120.66 LBS 54730.0 g / 536.9 N

A thin metal plate cannot conduct the full magnetic flux, which squanders power of the holder. Should you attach a powerful product to a thin surface, the field will penetrate right through and the pull force will drop sharply. To utilize full efficiency of this neodymium's potential, you require a sufficiently solid backing of metal. The saturation effect means that on sheet metal structures (e.g., appliance housings), the product works worse. We recommend selecting the steel cross-section from these parameters.

Table 5: Thermal resistance (material behavior) - resistance threshold
MW 40x30 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	54.73 kg / 120.66 LBS 54730.0 g / 536.9 N	OK
40 °C	-2.2%	53.53 kg / 118.00 LBS 53525.9 g / 525.1 N	OK
60 °C	-4.4%	52.32 kg / 115.35 LBS 52321.9 g / 513.3 N	OK
80 °C	-6.6%	51.12 kg / 112.70 LBS 51117.8 g / 501.5 N
100 °C	-28.8%	38.97 kg / 85.91 LBS 38967.8 g / 382.3 N

Classic neodymiums irreversibly lose parameters past the thermal threshold. Watch out for overheating – heat can permanently demagnetize this magnet. With increasing heat, the neodymium's force temporarily lowers. Do not use this magnet near heat sources higher than its working range. Too high temperature will result in destruction of magnetic properties.

*Engineering note: Heat tolerance is determined by both grade, as well as the dimension ratios. Low-profile magnets (low permeance coefficient) are more susceptible to demagnetization under lower heat stress than taller cylinders. Warning indicator in the table indicates permanent field degradation for this particular item.

Table 6: Two magnets (attraction) - field collision
MW 40x30 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	205.97 kg / 454.08 LBS 5 879 Gs	30.89 kg / 68.11 LBS 30895 g / 303.1 N	N/A
1 mm	195.99 kg / 432.09 LBS 10 060 Gs	29.40 kg / 64.81 LBS 29399 g / 288.4 N	176.39 kg / 388.88 LBS ~0 Gs
2 mm	186.03 kg / 410.12 LBS 9 800 Gs	27.90 kg / 61.52 LBS 27904 g / 273.7 N	167.42 kg / 369.11 LBS ~0 Gs
3 mm	176.30 kg / 388.68 LBS 9 541 Gs	26.45 kg / 58.30 LBS 26445 g / 259.4 N	158.67 kg / 349.81 LBS ~0 Gs
5 mm	157.67 kg / 347.60 LBS 9 023 Gs	23.65 kg / 52.14 LBS 23650 g / 232.0 N	141.90 kg / 312.84 LBS ~0 Gs
10 mm	116.59 kg / 257.04 LBS 7 759 Gs	17.49 kg / 38.56 LBS 17489 g / 171.6 N	104.93 kg / 231.34 LBS ~0 Gs
20 mm	59.56 kg / 131.31 LBS 5 545 Gs	8.93 kg / 19.70 LBS 8934 g / 87.6 N	53.60 kg / 118.18 LBS ~0 Gs
50 mm	7.52 kg / 16.58 LBS 1 971 Gs	1.13 kg / 2.49 LBS 1128 g / 11.1 N	6.77 kg / 14.92 LBS ~0 Gs
60 mm	4.05 kg / 8.93 LBS 1 446 Gs	0.61 kg / 1.34 LBS 608 g / 6.0 N	3.65 kg / 8.04 LBS ~0 Gs
70 mm	2.28 kg / 5.03 LBS 1 085 Gs	0.34 kg / 0.75 LBS 342 g / 3.4 N	2.05 kg / 4.53 LBS ~0 Gs
80 mm	1.34 kg / 2.96 LBS 832 Gs	0.20 kg / 0.44 LBS 201 g / 2.0 N	1.21 kg / 2.66 LBS ~0 Gs
90 mm	0.82 kg / 1.80 LBS 650 Gs	0.12 kg / 0.27 LBS 123 g / 1.2 N	0.74 kg / 1.62 LBS ~0 Gs
100 mm	0.52 kg / 1.14 LBS 517 Gs	0.08 kg / 0.17 LBS 78 g / 0.8 N	0.47 kg / 1.03 LBS ~0 Gs

Two magnets attract each other from a much further distance than a neodymium and metal combination. Such a system of two magnets produces a massive flux and a further horizon of performance. Designing a solid fastener? Utilize two neodymiums instead of one magnet and a steel. Exercise caution that when bringing together two magnets, the pinch force is massive. The repulsion force is a bit weaker than the connection force, but still significant.
*Flux density for N-N configuration reaches ~0 Gs at the midpoint of the gap (resulting from vector opposition).
Attention: Figures refer to shear force of a pair of identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Hazards (implants) - warnings
MW 40x30 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	23.5 cm
Hearing aid	10 Gs (1.0 mT)	18.0 cm
Timepiece	20 Gs (2.0 mT)	14.0 cm
Phone / Smartphone	40 Gs (4.0 mT)	11.0 cm
Remote	50 Gs (5.0 mT)	10.0 cm
Payment card	400 Gs (40.0 mT)	4.5 cm
HDD hard drive	600 Gs (60.0 mT)	3.5 cm

Extremely neodym field is a real danger to electronics and pacemakers. These NdFeB products produce a field that prevents correct functioning of sensitive medical devices. Remember: the unseen radiation penetrates the body and housings. Exceptional care must be taken by people with cochlear implants and drug dispensers. Influence will be felt by: automatic timepieces, car keys, membranes, and screens. Avoid contact with magnetic cards, hard drives, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - collision effects
MW 40x30 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	16.37 km/h (4.55 m/s)	2.92 J
30 mm	24.60 km/h (6.83 m/s)	6.60 J
50 mm	31.42 km/h (8.73 m/s)	10.77 J
100 mm	44.37 km/h (12.33 m/s)	21.48 J

NdFeB products are very brittle – a collision with steel risks their cracking. Control the attraction moment – a neodymium left loose turns into a projectile. Kinetic force can trigger coating fragments or painful pinches to fingers. Hold the magnet firmly during installation so it doesn't hit with great force against the metal. A collision at high speed almost guarantees destruction of the neodymium. Use safety goggles when handling with large magnets.

Table 9: Corrosion resistance
MW 40x30 / 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. Note the thickness of the protective layer.

Table 10: Electrical data (P_c)
MW 40x30 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	65 488 Mx	654.9 µWb
P_c Coefficient	0.76	High (Stable)

Total magnetic flux passing through the magnet pole. Essential parameter when building generators and motors. P_c value determines the working geometry.

Table 11: Submerged application
MW 40x30 / N38

Environment	Effective steel pull	Effect
Air (land)	54.73 kg	Standard
Water (riverbed)	62.67 kg (+7.94 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!

In water, the magnet feels stronger thanks to Archimedes' principle. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Vertical hold

*Note: On a vertical surface, the magnet holds merely ~20% of its perpendicular strength.

2. Steel thickness impact

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

3. Thermal stability

*For standard magnets, the safety limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.76

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 and environmental data

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%

Environmental data

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: 010068-2026

Magnet Unit Converter

Force (pull)

Force in kg

Force (N)

Force in lbs

Magnetic Induction

Induction (Gs)

Induction (T)

Input your value in a single slot to see the conversion in the other units right away.

View also offers

Product on order Ships in 3-5 days

MW 10x5 / N38 - cylindrical magnet

1.513 ZŁ brutto / pcs

Product on order Ships in 3-5 days

SM 18x125 [2xM5] / N42 - magnetic separator

276.75 ZŁ brutto / pcs

Product on order Ships in 3-5 days

SM 32x250 [2xM8] / N42 - magnetic separator

750.30 ZŁ brutto / pcs

Product on order Ships in 3-5 days

MW 45x35 / N38 - cylindrical magnet

180.10 ZŁ brutto / pcs

The presented product is an extremely powerful cylinder magnet, manufactured from advanced NdFeB material, which, with dimensions of Ø40x30 mm, guarantees the highest energy density. The MW 40x30 / N38 model is characterized by high dimensional repeatability and professional build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with significant force (approx. 54.73 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.

It finds application in modeling, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power of 536.88 N with a weight of only 282.74 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.

Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 40.1 mm) using epoxy glues. To ensure stability in industry, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.

Magnets NdFeB grade N38 are suitable 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 (Ø40x30), 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 40 mm and height 30 mm. The value of 536.88 N means that the magnet is capable of holding a weight many times exceeding its own mass of 282.74 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 30 mm), which means that the N and S poles are located on the flat, circular surfaces. Such an arrangement is most desirable 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 and disadvantages of Nd₂Fe₁₄B magnets.

Benefits

Besides their exceptional pulling force, neodymium magnets offer the following advantages:

They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
They do not lose their magnetic properties even under strong external field,
The use of an shiny coating of noble metals (nickel, gold, silver) causes the element to have aesthetics,
Magnets are characterized by excellent magnetic induction on the working surface,
Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
Possibility of accurate shaping and adjusting to precise conditions,
Wide application in modern industrial fields – they find application in computer drives, electromotive mechanisms, medical devices, as well as multitasking production systems.
Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Cons

Disadvantages of neodymium magnets:

To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (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 extremely 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, in case of application outdoors
We recommend a housing - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complex forms.
Potential hazard resulting from small fragments of magnets can be dangerous, if swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, small elements of these products can complicate diagnosis medical in case of swallowing.
Due to expensive raw materials, their price is relatively high,

Lifting parameters

Maximum lifting capacity of the magnet – what it depends on?

Holding force of 54.73 kg is a measurement result conducted under standard conditions:

with the contact of a sheet made of low-carbon steel, guaranteeing maximum field concentration
with a thickness minimum 10 mm
with an polished contact surface
without any air gap between the magnet and steel
for force applied at a right angle (pull-off, not shear)
in stable room temperature

Lifting capacity in practice – influencing factors

It is worth knowing that the magnet holding will differ depending on the following factors, in order of importance:

Distance (betwixt the magnet and the plate), as even a very small distance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to paint, rust or debris).
Loading method – declared lifting capacity refers to detachment vertically. When slipping, the magnet holds significantly lower power (often approx. 20-30% of maximum force).
Plate thickness – insufficiently thick plate does not close the flux, causing part of the flux to be escaped to the other side.
Plate material – mild steel gives the best results. Alloy admixtures reduce magnetic properties and lifting capacity.
Base smoothness – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Unevenness acts like micro-gaps.
Thermal conditions – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and in frost gain strength (up to a certain limit).

Lifting capacity was determined with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular pulling force, whereas under attempts to slide the magnet the holding force is lower. Moreover, even a small distance between the magnet’s surface and the plate decreases the holding force.

H&S for magnets

Swallowing risk

Only for adults. Small elements can be swallowed, leading to severe trauma. Store away from children and animals.

Skin irritation risks

Some people suffer from a contact allergy to Ni, which is the typical protective layer for neodymium magnets. Frequent touching might lead to skin redness. We suggest use protective gloves.

Beware of splinters

Beware of splinters. Magnets can explode upon violent connection, ejecting shards into the air. Wear goggles.

Serious injuries

Protect your hands. Two powerful magnets will join immediately with a force of several hundred kilograms, crushing everything in their path. Be careful!

Permanent damage

Watch the temperature. Exposing the magnet above 80 degrees Celsius will destroy its properties and pulling force.

Safe distance

Intense magnetic fields can corrupt files on credit cards, HDDs, and other magnetic media. Stay away of at least 10 cm.

Magnetic interference

A strong magnetic field interferes with the operation of magnetometers in smartphones and navigation systems. Do not bring magnets close to a device to avoid damaging the sensors.

Combustion hazard

Machining of neodymium magnets poses a fire risk. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Life threat

For implant holders: Powerful magnets affect electronics. Maintain at least 30 cm distance or request help to handle the magnets.

Conscious usage

Be careful. Rare earth magnets attract from a distance and connect with huge force, often faster than you can move away.

Danger! Details about hazards in the article: Magnet Safety Guide.

MW 40x30 / N38 - cylindrical magnet

Product card - MW 40x30 / 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 (force vs distance) - interaction chart MW 40x30 / N38

Table 2: Vertical hold (wall) MW 40x30 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces MW 40x30 / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection MW 40x30 / N38

Table 5: Thermal resistance (material behavior) - resistance threshold MW 40x30 / N38

Table 6: Two magnets (attraction) - field collision MW 40x30 / N38

Table 7: Hazards (implants) - warnings MW 40x30 / N38

Table 8: Dynamics (cracking risk) - collision effects MW 40x30 / N38

Table 9: Corrosion resistance MW 40x30 / N38

Table 10: Electrical data (Pc) MW 40x30 / N38

Table 11: Submerged application MW 40x30 / N38

1. Vertical hold

2. Steel thickness impact

3. Thermal stability

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

Elemental analysis

Environmental data

Force (pull)

Magnetic Induction

View also offers

MW 10x5 / N38 - cylindrical magnet

SM 18x125 [2xM5] / N42 - magnetic separator

SM 32x250 [2xM8] / N42 - magnetic separator

MW 45x35 / N38 - cylindrical magnet

Advantages and disadvantages of Nd2Fe14B magnets.

Benefits

Cons

Lifting parameters

Maximum lifting capacity of the magnet – what it depends on?

Lifting capacity in practice – influencing factors

H&S for magnets

Swallowing risk

Skin irritation risks

Beware of splinters

Serious injuries

Permanent damage

Safe distance

Magnetic interference

Combustion hazard

Life threat

Conscious usage

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs distance) - interaction chart
MW 40x30 / N38

Table 2: Vertical hold (wall)
MW 40x30 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 40x30 / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 40x30 / N38

Table 5: Thermal resistance (material behavior) - resistance threshold
MW 40x30 / N38

Table 6: Two magnets (attraction) - field collision
MW 40x30 / N38

Table 7: Hazards (implants) - warnings
MW 40x30 / N38

Table 8: Dynamics (cracking risk) - collision effects
MW 40x30 / N38

Table 9: Corrosion resistance
MW 40x30 / N38

Table 10: Electrical data (P_c)
MW 40x30 / N38

Table 11: Submerged application
MW 40x30 / N38

Advantages and disadvantages of Nd₂Fe₁₄B magnets.