Product available Ships today (order by 14:00)

MW 45x25 / 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 010072

GTIN/EAN: 5906301810711

5.00

Diameter Ø

45 mm [±0,1 mm]

Height

25 mm [±0,1 mm]

Weight

298.21 g

Magnetization Direction

↑ axial

Load capacity

67.33 kg / 660.51 N

Magnetic Induction

460.72 mT / 4607 Gs

Coating

[NiCuNi] Nickel

view technical specifications »

101.55 ZŁ with VAT / pcs + price for transport

82.56 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

82.56 ZŁ

101.55 ZŁ

price from 10 pcs

77.61 ZŁ

95.46 ZŁ

price from 40 pcs

72.65 ZŁ

89.36 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Want to negotiate?

Give us a call +48 888 99 98 98 or contact us by means of our online form the contact section.
Weight along with form of magnets can be verified on our magnetic mass calculator.

Orders submitted before 14:00 will be dispatched today!

Product card - MW 45x25 / N38 - cylindrical magnet

Specification / characteristics - MW 45x25 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010072
GTIN/EAN	5906301810711
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	45 mm [±0,1 mm]
Height	25 mm [±0,1 mm]
Weight	298.21 g
Magnetization Direction	↑ axial
Load capacity ~ ?	67.33 kg / 660.51 N
Magnetic Induction ~ ?	460.72 mT / 4607 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 45x25 / 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

Physical simulation of the product - data

These information are the result of a physical simulation. Values are based on models for the material Nd₂Fe₁₄B. Operational conditions might slightly deviate from the simulation results. Treat these data as a reference point for designers.

Table 1: Static pull force (force vs gap) - interaction chart
MW 45x25 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	4606 Gs 460.6 mT	67.33 kg / 148.44 pounds 67330.0 g / 660.5 N	critical level
1 mm	4413 Gs 441.3 mT	61.79 kg / 136.23 pounds 61791.4 g / 606.2 N	critical level
2 mm	4214 Gs 421.4 mT	56.35 kg / 124.22 pounds 56345.9 g / 552.8 N	critical level
3 mm	4014 Gs 401.4 mT	51.11 kg / 112.68 pounds 51112.0 g / 501.4 N	critical level
5 mm	3615 Gs 361.5 mT	41.47 kg / 91.42 pounds 41466.0 g / 406.8 N	critical level
10 mm	2697 Gs 269.7 mT	23.08 kg / 50.89 pounds 23083.9 g / 226.5 N	critical level
15 mm	1965 Gs 196.5 mT	12.25 kg / 27.00 pounds 12247.0 g / 120.1 N	critical level
20 mm	1426 Gs 142.6 mT	6.46 kg / 14.23 pounds 6455.7 g / 63.3 N	warning
30 mm	778 Gs 77.8 mT	1.92 kg / 4.24 pounds 1922.5 g / 18.9 N	low risk
50 mm	285 Gs 28.5 mT	0.26 kg / 0.57 pounds 257.0 g / 2.5 N	low risk

Magnetic force drops sharply with every mm of gap. Note that even the smallest gap (e.g., contamination, paint, veneer) noticeably weakens the grip. Magnets hold optimally in perfect adhesion; air break kills the power. Observe how rapidly the parameters drop, when the magnet does not touch directly to the steel surface. When planning the assembly, discard unnecessary gaps.

Table 2: Vertical load (vertical surface)
MW 45x25 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	13.47 kg / 29.69 pounds 13466.0 g / 132.1 N
1 mm	Stal (~0.2)	12.36 kg / 27.24 pounds 12358.0 g / 121.2 N
2 mm	Stal (~0.2)	11.27 kg / 24.85 pounds 11270.0 g / 110.6 N
3 mm	Stal (~0.2)	10.22 kg / 22.54 pounds 10222.0 g / 100.3 N
5 mm	Stal (~0.2)	8.29 kg / 18.29 pounds 8294.0 g / 81.4 N
10 mm	Stal (~0.2)	4.62 kg / 10.18 pounds 4616.0 g / 45.3 N
15 mm	Stal (~0.2)	2.45 kg / 5.40 pounds 2450.0 g / 24.0 N
20 mm	Stal (~0.2)	1.29 kg / 2.85 pounds 1292.0 g / 12.7 N
30 mm	Stal (~0.2)	0.38 kg / 0.85 pounds 384.0 g / 3.8 N
50 mm	Stal (~0.2)	0.05 kg / 0.11 pounds 52.0 g / 0.5 N

The following data indicates the approximate weight limit needed to cause the downward movement of the magnet downwards against a vertical metal surface (considering standard friction). This value is a function of the separation distance between the magnet and the metal.

Table 3: Vertical assembly (shearing) - vertical pull
MW 45x25 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	20.20 kg / 44.53 pounds 20199.0 g / 198.2 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	13.47 kg / 29.69 pounds 13466.0 g / 132.1 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	6.73 kg / 14.84 pounds 6733.0 g / 66.1 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	33.67 kg / 74.22 pounds 33665.0 g / 330.3 N

When placing a magnet on a upright wall (e.g., a board), it will only hold only approx. 1/5 of nominal attraction strength. Gravity and a weak degree of grip mean that holders slip faster than they pop off the substrate. Want to create a wall mount? Remember that the shear force is significantly lower than the maximum static pull force. On a slippery surface, the magnet will give way down under a noticeably lighter weight. Utilizing a rubberized coating can significantly improve the result.

Table 4: Steel thickness (substrate influence) - power losses
MW 45x25 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	3%	2.24 kg / 4.95 pounds 2244.3 g / 22.0 N
1 mm	8%	5.61 kg / 12.37 pounds 5610.8 g / 55.0 N
2 mm	17%	11.22 kg / 24.74 pounds 11221.7 g / 110.1 N
3 mm	25%	16.83 kg / 37.11 pounds 16832.5 g / 165.1 N
5 mm	42%	28.05 kg / 61.85 pounds 28054.2 g / 275.2 N
10 mm	83%	56.11 kg / 123.70 pounds 56108.3 g / 550.4 N
11 mm	92%	61.72 kg / 136.07 pounds 61719.2 g / 605.5 N
12 mm	100%	67.33 kg / 148.44 pounds 67330.0 g / 660.5 N

A too thin steel is unable to focus the entire magnetic field, which wastes potential of the magnet. Should you attach a powerful product to a weak sheet, the magnetism will penetrate right through and the holding will be smaller. To squeeze the maximum of this neodymium's potential, you need a suitably thick backing of steel. The saturation phenomenon means that on delicate walls (e.g., car bodies), the holder works worse. We advise picking the steel dimension from these parameters.

Table 5: Thermal stability (stability) - thermal limit
MW 45x25 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	67.33 kg / 148.44 pounds 67330.0 g / 660.5 N	OK
40 °C	-2.2%	65.85 kg / 145.17 pounds 65848.7 g / 646.0 N	OK
60 °C	-4.4%	64.37 kg / 141.91 pounds 64367.5 g / 631.4 N	OK
80 °C	-6.6%	62.89 kg / 138.64 pounds 62886.2 g / 616.9 N
100 °C	-28.8%	47.94 kg / 105.69 pounds 47939.0 g / 470.3 N

Classic neodymiums irreversibly lose strength past the thermal threshold. Watch out for overheating – high temperature can permanently demagnetize this magnet. With every degree above norm, the magnet's power temporarily decreases. Do not use this product in hot environments higher than its working range. Ignoring the limit will lead to destruction of magnetism.

*Technical advisory: Heat tolerance depends not only on the material grade, and the Permeance Coefficient Pc. Flat magnets (low permeance coefficient) are more susceptible to demagnetization under lower heat stress compared to rod magnets. Red status in the table points to permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 45x25 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	208.06 kg / 458.70 pounds 5 651 Gs	31.21 kg / 68.80 pounds 31209 g / 306.2 N	N/A
1 mm	199.55 kg / 439.92 pounds 9 023 Gs	29.93 kg / 65.99 pounds 29932 g / 293.6 N	179.59 kg / 395.93 pounds ~0 Gs
2 mm	190.95 kg / 420.96 pounds 8 826 Gs	28.64 kg / 63.14 pounds 28642 g / 281.0 N	171.85 kg / 378.87 pounds ~0 Gs
3 mm	182.46 kg / 402.26 pounds 8 628 Gs	27.37 kg / 60.34 pounds 27369 g / 268.5 N	164.22 kg / 362.03 pounds ~0 Gs
5 mm	165.94 kg / 365.83 pounds 8 228 Gs	24.89 kg / 54.87 pounds 24891 g / 244.2 N	149.35 kg / 329.25 pounds ~0 Gs
10 mm	128.14 kg / 282.49 pounds 7 230 Gs	19.22 kg / 42.37 pounds 19221 g / 188.6 N	115.32 kg / 254.24 pounds ~0 Gs
20 mm	71.33 kg / 157.26 pounds 5 394 Gs	10.70 kg / 23.59 pounds 10700 g / 105.0 N	64.20 kg / 141.54 pounds ~0 Gs
50 mm	10.72 kg / 23.63 pounds 2 091 Gs	1.61 kg / 3.54 pounds 1608 g / 15.8 N	9.65 kg / 21.26 pounds ~0 Gs
60 mm	5.94 kg / 13.10 pounds 1 557 Gs	0.89 kg / 1.96 pounds 891 g / 8.7 N	5.35 kg / 11.79 pounds ~0 Gs
70 mm	3.41 kg / 7.52 pounds 1 180 Gs	0.51 kg / 1.13 pounds 512 g / 5.0 N	3.07 kg / 6.77 pounds ~0 Gs
80 mm	2.03 kg / 4.48 pounds 910 Gs	0.30 kg / 0.67 pounds 305 g / 3.0 N	1.83 kg / 4.03 pounds ~0 Gs
90 mm	1.25 kg / 2.76 pounds 714 Gs	0.19 kg / 0.41 pounds 188 g / 1.8 N	1.13 kg / 2.48 pounds ~0 Gs
100 mm	0.79 kg / 1.75 pounds 569 Gs	0.12 kg / 0.26 pounds 119 g / 1.2 N	0.71 kg / 1.58 pounds ~0 Gs

Two magnets attract each other from a much further distance than a magnet and sheet setup. The connection of magnet-to-magnet generates a stronger field and a further horizon of performance. Planning to create a powerful holder? Utilize two neodymiums instead of one magnet and a steel. Remember that when connecting a pair of magnets, the pinch force is extreme. The repulsion force is slightly lower than the attraction, but still impressive.
*Field value for N-N configuration reaches ~0 Gs at the geometric center of the gap (due to field cancellation).
* Calculations apply to friction force of two matching neodymium magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Safety (HSE) (electronics) - warnings
MW 45x25 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	24.0 cm
Hearing aid	10 Gs (1.0 mT)	19.0 cm
Timepiece	20 Gs (2.0 mT)	14.5 cm
Phone / Smartphone	40 Gs (4.0 mT)	11.5 cm
Car key	50 Gs (5.0 mT)	10.5 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 poses a real danger to electronics as well as pacemakers. These NdFeB products produce a flux that disrupts operation of sensitive medical devices. Remember: the unseen radiation passes through tissues and plastic. Special caution must be exercised by people with hearing aids and drug dispensers. Also at risk are: mechanical watches, car keys, membranes, and screens. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - warning
MW 45x25 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	18.11 km/h (5.03 m/s)	3.77 J
30 mm	26.71 km/h (7.42 m/s)	8.21 J
50 mm	33.97 km/h (9.43 m/s)	13.27 J
100 mm	47.92 km/h (13.31 m/s)	26.42 J

Magnetic elements are delicate – a collision with steel risks their cracking. Watch the impact speed – a neodymium left loose turns into a projectile. Striking energy can cause material chips or dangerous crushing to fingers. Be sure to control the product during bringing near metal so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Wear eye protection when working with powerful specimens.

Table 9: Surface protection spec
MW 45x25 / 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. Note the thickness of the protective layer.

Table 10: Construction data (P_c)
MW 45x25 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	73 928 Mx	739.3 µWb
P_c Coefficient	0.63	High (Stable)

Total magnetic flux emitted by the pole surface. Essential parameter for generator designers as well as sensors. P_c value determines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MW 45x25 / N38

Environment	Effective steel pull	Effect
Air (land)	67.33 kg	Standard
Water (riverbed)	77.09 kg (+9.76 kg buoyancy gain)	+14.5%

Rust risk: 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. Buoyancy helps in lifting finds.

1. Sliding resistance

*Note: On a vertical wall, the magnet retains just approx. 20-30% of its max power.

2. Steel saturation

*Thin metal sheet (e.g. 0.5mm PC case) significantly reduces the holding force.

3. Power loss vs temp

*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) = 0.63

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.

Engineering data and GPSR

Chemical composition

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: 010072-2026

Magnet Unit Converter

Force (pull)

lbs

Magnetic Induction

Induction (Gs)

Induction (T)

Simply complete any input, and the tool compute everything else automatically.

Other proposals

Product available Ships today (order by 14:00)

MW 33x30 / N38 - cylindrical magnet

52.89 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

UMH 60x15x69 [M8] / N38 - magnetic holder with hook

143.91 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

SM 19x225 [2xM6] / N50 - magnetic separator

492.00 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

MW 7x1.5 / N38 - cylindrical magnet

0.369 ZŁ brutto / pcs

This product is an incredibly powerful cylindrical magnet, composed of modern NdFeB material, which, at dimensions of Ø45x25 mm, guarantees optimal power. The MW 45x25 / N38 model boasts an accuracy of ±0.1mm and professional build quality, making it an ideal solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 67.33 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.

This model is perfect for building electric motors, advanced sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the high power of 660.51 N with a weight of only 298.21 g, this rod is indispensable in electronics and wherever every gram matters.

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 professional component. To ensure long-term durability in automation, specialized industrial adhesives are used, which do not react with the nickel coating 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 even stronger magnets in the same volume (Ø45x25), 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 Ø45x25 mm, which, at a weight of 298.21 g, makes it an element with high magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 67.33 kg (force ~660.51 N), which, with such defined 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.

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 45 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 through the diameter if your project requires it.

Pros as well as cons of neodymium magnets.

Advantages

Apart from their superior power, neodymium magnets have these key benefits:

They retain magnetic properties for nearly 10 years – the loss is just ~1% (according to analyses),
They show high resistance to demagnetization induced by external magnetic fields,
A magnet with a metallic nickel surface has better aesthetics,
They show high magnetic induction at the operating surface, which affects their effectiveness,
Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
Thanks to versatility in forming and the ability to modify to complex applications,
Significant place in future technologies – they are used in computer drives, motor assemblies, precision medical tools, as well as modern systems.
Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which makes them useful in compact constructions

Disadvantages

Characteristics of disadvantages of neodymium magnets: application proposals

To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
When exposed to high temperature, neodymium magnets suffer a drop in power. 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
When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation as well as corrosion.
Limited ability of making nuts in the magnet and complicated shapes - recommended is cover - magnetic holder.
Health risk resulting from small fragments of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child health protection. It is also worth noting that small elements of these magnets are able to complicate diagnosis medical when they are in the body.
With mass production the cost of neodymium magnets is economically unviable,

Pull force analysis

Magnetic strength at its maximum – what it depends on?

The load parameter shown concerns the peak performance, recorded under ideal test conditions, namely:

on a plate made of mild steel, perfectly concentrating the magnetic flux
whose transverse dimension equals approx. 10 mm
with an ideally smooth contact surface
with direct contact (without impurities)
during detachment in a direction perpendicular to the plane
at room temperature

Impact of factors on magnetic holding capacity in practice

In practice, the actual holding force depends on many variables, presented from the most important:

Distance (between the magnet and the metal), since even a very small distance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
Direction of force – highest force is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is usually many times smaller (approx. 1/5 of the lifting capacity).
Steel thickness – too thin sheet does not accept the full field, causing part of the power to be escaped to the other side.
Material composition – not every steel reacts the same. High carbon content weaken the attraction effect.
Surface structure – the more even the plate, the better the adhesion and higher the lifting capacity. Roughness acts like micro-gaps.
Operating temperature – neodymium magnets have a negative temperature coefficient. When it is hot they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under parallel forces the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet’s surface and the plate decreases the load capacity.

Safe handling of neodymium magnets

Medical interference

Health Alert: Strong magnets can deactivate heart devices and defibrillators. Stay away if you have medical devices.

Magnetic media

Powerful magnetic fields can erase data on payment cards, hard drives, and storage devices. Maintain a gap of at least 10 cm.

Thermal limits

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

Magnet fragility

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

Combustion hazard

Dust produced during machining of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.

Bone fractures

Risk of injury: The attraction force is so immense that it can result in blood blisters, crushing, and even bone fractures. Protective gloves are recommended.

Magnetic interference

A powerful magnetic field interferes with the functioning of magnetometers in smartphones and GPS navigation. Do not bring magnets near a device to prevent damaging the sensors.

Choking Hazard

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

Metal Allergy

Allergy Notice: The Ni-Cu-Ni coating contains nickel. If skin irritation appears, cease working with magnets and use protective gear.

Powerful field

Exercise caution. Neodymium magnets attract from a distance and connect with massive power, often quicker than you can react.

Important! Want to know more? Check our post: Are neodymium magnets dangerous?

MW 45x25 / N38 - cylindrical magnet

Product card - MW 45x25 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical simulation of the product - data

Table 1: Static pull force (force vs gap) - interaction chart MW 45x25 / N38

Table 2: Vertical load (vertical surface) MW 45x25 / N38

Table 3: Vertical assembly (shearing) - vertical pull MW 45x25 / N38

Table 4: Steel thickness (substrate influence) - power losses MW 45x25 / N38

Table 5: Thermal stability (stability) - thermal limit MW 45x25 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system MW 45x25 / N38

Table 7: Safety (HSE) (electronics) - warnings MW 45x25 / N38

Table 8: Collisions (cracking risk) - warning MW 45x25 / N38

Table 9: Surface protection spec MW 45x25 / N38

Table 10: Construction data (Pc) MW 45x25 / N38

Table 11: Underwater work (magnet fishing) MW 45x25 / N38

1. Sliding resistance

2. Steel saturation

3. Power loss vs temp

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

Chemical composition

Sustainability

Force (pull)

Magnetic Induction

Other proposals

MW 33x30 / N38 - cylindrical magnet

UMH 60x15x69 [M8] / N38 - magnetic holder with hook

SM 19x225 [2xM6] / N50 - magnetic separator

MW 7x1.5 / N38 - cylindrical magnet

Pros as well as cons of neodymium magnets.

Advantages

Disadvantages

Pull force analysis

Magnetic strength at its maximum – what it depends on?

Impact of factors on magnetic holding capacity in practice

Safe handling of neodymium magnets

Medical interference

Magnetic media

Thermal limits

Magnet fragility

Combustion hazard

Bone fractures

Magnetic interference

Choking Hazard

Metal Allergy

Powerful field

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs gap) - interaction chart
MW 45x25 / N38

Table 2: Vertical load (vertical surface)
MW 45x25 / N38

Table 3: Vertical assembly (shearing) - vertical pull
MW 45x25 / N38

Table 4: Steel thickness (substrate influence) - power losses
MW 45x25 / N38

Table 5: Thermal stability (stability) - thermal limit
MW 45x25 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 45x25 / N38

Table 7: Safety (HSE) (electronics) - warnings
MW 45x25 / N38

Table 8: Collisions (cracking risk) - warning
MW 45x25 / N38

Table 9: Surface protection spec
MW 45x25 / N38

Table 10: Construction data (P_c)
MW 45x25 / N38

Table 11: Underwater work (magnet fishing)
MW 45x25 / N38