Product available Ships today (order by 14:00)

MW 55x25 / N38 - cylindrical magnet

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, mazowieckie, 05-850, PL
Telephone: +48 22 499 98 98
Price range: 1-6500 PLN

cylindrical magnet

Catalog no 010081

GTIN/EAN: 5906301810803

5.00

Load capacity 92.25 kg / 904.94 N Magnetic Induction 416.97 mT / 4170 Gs

Diameter Ø: 55 mm [±0,1 mm]
Height: 25 mm [±0,1 mm]
Weight: 445.47 g
Magnetization Direction: ↑ axial
Coating: [NiCuNi] Nickel

How we measure these parameters — certificates and measurements

see properties »

125.37 zł net / pcs

154.21 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

Need more?

Quantity

Net

Gross

price from 1 pcs

125.37 zł

154.21 zł

price from 5 pcs

117.85 zł

144.95 zł

price from 20 pcs

110.33 zł

135.70 zł

Frequently asked questions

What is the maximum working temperature of a disc magnet?

Standard N-series grades work up to 80 °C. Grades N50, N52 and N54 have a lower limit of 60 °C, because coercivity falls as BHmax rises. Higher temperatures require the H (120 °C), SH (150 °C), UH (180 °C), EH (200 °C) or AH (230 °C) series. Within the working range the magnet loses about 0.11% of its induction per degree, and that loss is reversible.

What is the difference between N38, N42 and N52?

The number after N is the energy product BHmax. Moving from N38 to N52 raises it by several tens of percent, but the real holding force increases by roughly 20%, because force also depends on geometry and on the magnetic circuit. N52 costs about twice as much as N42, so for most mounting work N38–N42 is the best price-to-force ratio.

What is the dimensional tolerance?

±0.1 mm as standard, ±0.05 mm to order. The tolerance is stated next to the dimensions on every product page.

Guides from the knowledge base

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

PDF report Calculator

Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

Order by 14:00 and we’ll ship today!

Technical of the product - MW 55x25 / N38 - cylindrical magnet

Specification / characteristics - MW 55x25 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010081
GTIN/EAN	5906301810803
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	55 mm [±0,1 mm]
Height	25 mm [±0,1 mm]
Weight	445.47 g
Magnetization Direction	↑ axial
Load capacity ~ ?	92.25 kg / 904.94 N
Magnetic Induction ~ ?	416.97 mT / 4170 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 55x25 / N38 - cylindrical magnet

properties	values	units
Remanence Br ?	12.2-12.6	kGs
Remanence Br ?	1220-1260	mT
Coercivity bHc ?	10.8-11.5	kOe
Coercivity bHc ?	860-915	kA/m
Intrinsic coercivity iHc	≥ 12	kOe
Intrinsic coercivity iHc	≥ 955	kA/m
Energy product BHmax ?	36-38	BH max MGOe
Energy product BHmax ?	287-303	BH max KJ/m
Maximum working 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	310	°C
Curie Temperature TF	590	°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 analysis of the assembly - report

Presented information constitute the direct effect of a engineering calculation. Values were calculated on algorithms for the material Nd₂Fe₁₄B. Real-world performance may differ from theoretical values. Use these calculations as a supplementary guide during assembly planning.

Table 1: Static pull force (pull vs gap) - power drop
MW 55x25 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	4169 Gs 416.9 mT	92.25 kg / 203.38 LBS 92250.0 g / 905.0 N	dangerous!
1 mm	4034 Gs 403.4 mT	86.37 kg / 190.41 LBS 86369.8 g / 847.3 N	dangerous!
2 mm	3894 Gs 389.4 mT	80.47 kg / 177.41 LBS 80469.7 g / 789.4 N	dangerous!
3 mm	3751 Gs 375.1 mT	74.67 kg / 164.62 LBS 74670.6 g / 732.5 N	dangerous!
5 mm	3461 Gs 346.1 mT	63.58 kg / 140.17 LBS 63580.6 g / 623.7 N	dangerous!
10 mm	2756 Gs 275.6 mT	40.32 kg / 88.89 LBS 40320.8 g / 395.5 N	dangerous!
15 mm	2140 Gs 214.0 mT	24.31 kg / 53.59 LBS 24308.3 g / 238.5 N	dangerous!
20 mm	1644 Gs 164.4 mT	14.34 kg / 31.61 LBS 14338.1 g / 140.7 N	dangerous!
30 mm	975 Gs 97.5 mT	5.05 kg / 11.12 LBS 5046.0 g / 49.5 N	strong
50 mm	388 Gs 38.8 mT	0.80 kg / 1.77 LBS 801.0 g / 7.9 N	low risk

Pulling power decreases sharply with every mm of gap. Keep in mind that even the smallest gap (e.g., contamination, paint, veneer) noticeably weakens the grip. Neodymiums hold most effectively in perfect adhesion; air break weakens the power. Notice how flashily the load capacity fall, when the magnet does not adhere flatly to the steel surface. When calculating the arrangement, discard additional spacers.

Table 2: Shear force (wall)
MW 55x25 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	18.45 kg / 40.68 LBS 18450.0 g / 181.0 N
1 mm	Stal (~0.2)	17.27 kg / 38.08 LBS 17274.0 g / 169.5 N
2 mm	Stal (~0.2)	16.09 kg / 35.48 LBS 16094.0 g / 157.9 N
3 mm	Stal (~0.2)	14.93 kg / 32.92 LBS 14934.0 g / 146.5 N
5 mm	Stal (~0.2)	12.72 kg / 28.03 LBS 12716.0 g / 124.7 N
10 mm	Stal (~0.2)	8.06 kg / 17.78 LBS 8064.0 g / 79.1 N
15 mm	Stal (~0.2)	4.86 kg / 10.72 LBS 4862.0 g / 47.7 N
20 mm	Stal (~0.2)	2.87 kg / 6.32 LBS 2868.0 g / 28.1 N
30 mm	Stal (~0.2)	1.01 kg / 2.23 LBS 1010.0 g / 9.9 N
50 mm	Stal (~0.2)	0.16 kg / 0.35 LBS 160.0 g / 1.6 N

This section presents the approximate holding capacity required to initiate the slippage of the magnet downwards along a upright metal surface (considering standard friction). The holding force depends on the distance between the magnet and the metal.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 55x25 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	27.68 kg / 61.01 LBS 27675.0 g / 271.5 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	18.45 kg / 40.68 LBS 18450.0 g / 181.0 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	9.23 kg / 20.34 LBS 9225.0 g / 90.5 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	46.13 kg / 101.69 LBS 46125.0 g / 452.5 N

When mounting a magnet on a upright surface (e.g., a board), it will only hold just approx. 20%-30% of its nominal power. Gravitational force as well as a low friction coefficient mean that holders slip easier than they pop off the substrate. Planning a hanger? Consider that the shear force is much weaker than the perpendicular breakaway force. On a slippery surface, the element will slip down under a noticeably lighter cargo. Using a rubber pad can effectively raise the stability.

Table 4: Steel thickness (saturation) - power losses
MW 55x25 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	3%	3.08 kg / 6.78 LBS 3075.0 g / 30.2 N
1 mm	8%	7.69 kg / 16.95 LBS 7687.5 g / 75.4 N
2 mm	17%	15.37 kg / 33.90 LBS 15375.0 g / 150.8 N
3 mm	25%	23.06 kg / 50.84 LBS 23062.5 g / 226.2 N
5 mm	42%	38.44 kg / 84.74 LBS 38437.5 g / 377.1 N
10 mm	83%	76.88 kg / 169.48 LBS 76875.0 g / 754.1 N
11 mm	92%	84.56 kg / 186.43 LBS 84562.5 g / 829.6 N
12 mm	100%	92.25 kg / 203.38 LBS 92250.0 g / 905.0 N

A thin sheet is incapable of conduct the entire magnetic field, which wastes potential of the magnet. Should you install a neodymium to a weak sheet, the flux will pass right through and the attraction force will be weaker. To achieve 100% of this magnet's potential, you need a suitably thick element of steel. The saturation effect means that on thin elements (e.g., appliance housings), the product shows lower pull force. We advise picking the steel dimension based on the following data.

Table 5: Working in heat (stability) - power drop
MW 55x25 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	92.25 kg / 203.38 LBS 92250.0 g / 905.0 N	OK
40 °C	-2.2%	90.22 kg / 198.90 LBS 90220.5 g / 885.1 N	OK
60 °C	-4.4%	88.19 kg / 194.43 LBS 88191.0 g / 865.2 N
80 °C	-6.6%	86.16 kg / 189.95 LBS 86161.5 g / 845.2 N
100 °C	-28.8%	65.68 kg / 144.80 LBS 65682.0 g / 644.3 N

Classic neodymiums lose parameters past the thermal threshold. Protect against heat – excessive heat can irreversibly destroy this magnet. With increasing heat, the neodymium's capacity briefly decreases. Avoid using this magnet close to ovens higher than its safe range. Too high temperature will lead to irreversible degradation of magnetic properties.

*Technical advisory: Thermal stability is determined by both grade, as well as the dimension ratios. Low-profile magnets (pancake types) are more susceptible to demagnetization sooner than taller cylinders. Red status in the table signals permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 55x25 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	254.60 kg / 561.30 LBS 5 431 Gs	38.19 kg / 84.20 LBS 38190 g / 374.6 N	N/A
1 mm	246.57 kg / 543.59 LBS 8 206 Gs	36.99 kg / 81.54 LBS 36985 g / 362.8 N	221.91 kg / 489.23 LBS ~0 Gs
2 mm	238.37 kg / 525.52 LBS 8 068 Gs	35.76 kg / 78.83 LBS 35756 g / 350.8 N	214.54 kg / 472.97 LBS ~0 Gs
3 mm	230.21 kg / 507.52 LBS 7 929 Gs	34.53 kg / 76.13 LBS 34531 g / 338.7 N	207.19 kg / 456.77 LBS ~0 Gs
5 mm	214.04 kg / 471.88 LBS 7 645 Gs	32.11 kg / 70.78 LBS 32106 g / 315.0 N	192.64 kg / 424.69 LBS ~0 Gs
10 mm	175.48 kg / 386.86 LBS 6 923 Gs	26.32 kg / 58.03 LBS 26322 g / 258.2 N	157.93 kg / 348.17 LBS ~0 Gs
20 mm	111.28 kg / 245.33 LBS 5 513 Gs	16.69 kg / 36.80 LBS 16692 g / 163.8 N	100.15 kg / 220.80 LBS ~0 Gs
50 mm	23.33 kg / 51.43 LBS 2 524 Gs	3.50 kg / 7.71 LBS 3499 g / 34.3 N	20.99 kg / 46.28 LBS ~0 Gs
60 mm	13.93 kg / 30.70 LBS 1 950 Gs	2.09 kg / 4.61 LBS 2089 g / 20.5 N	12.53 kg / 27.63 LBS ~0 Gs
70 mm	8.48 kg / 18.70 LBS 1 522 Gs	1.27 kg / 2.81 LBS 1272 g / 12.5 N	7.63 kg / 16.83 LBS ~0 Gs
80 mm	5.29 kg / 11.66 LBS 1 202 Gs	0.79 kg / 1.75 LBS 793 g / 7.8 N	4.76 kg / 10.50 LBS ~0 Gs
90 mm	3.38 kg / 7.45 LBS 961 Gs	0.51 kg / 1.12 LBS 507 g / 5.0 N	3.04 kg / 6.70 LBS ~0 Gs
100 mm	2.21 kg / 4.87 LBS 777 Gs	0.33 kg / 0.73 LBS 332 g / 3.3 N	1.99 kg / 4.39 LBS ~0 Gs

Two strong neodymiums interact from a significantly greater distance than a magnet and steel combination. The setup of magnet-to-magnet produces a massive flux and a wider radius of performance. Designing a powerful holder? Utilize two neodymiums instead of one magnet and a striker plate. Exercise caution that when bringing together two magnets, the impact force is extreme. The repulsion force is a bit weaker than the connection force, but still impressive.
*The magnetic induction in repulsion mode reaches ~0 Gs in the exact middle between the magnets (due to field cancellation).
Attention: Estimates apply to sliding force of two identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Protective zones (implants) - precautionary measures
MW 55x25 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	27.5 cm
Hearing aid	10 Gs (1.0 mT)	21.5 cm
Timepiece	20 Gs (2.0 mT)	17.0 cm
Phone / Smartphone	40 Gs (4.0 mT)	13.0 cm
Remote	50 Gs (5.0 mT)	12.0 cm
Payment card	400 Gs (40.0 mT)	5.0 cm
HDD hard drive	600 Gs (60.0 mT)	4.5 cm

Extremely neodym field poses a large risk to electronics as well as pacemakers. These neodymiums produce a field that disrupts operation of sensitive medical devices. Notice: the invisible magnetic field penetrates the body and housings. Increased vigilance must be exercised by people with cochlear implants and drug dispensers. Influence will be felt by: mechanical watches, remotes, membranes, and displays. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Impact energy (kinetic energy) - collision effects
MW 55x25 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	19.19 km/h (5.33 m/s)	6.33 J
30 mm	23.74 km/h (6.59 m/s)	9.68 J
50 mm	24.27 km/h (6.74 m/s)	10.12 J
100 mm	24.39 km/h (6.78 m/s)	10.23 J

Magnetic elements are prone to chipping – a violent impact against metal risks their cracking. Pay attention to connection velocity – a neodymium left loose turns into a projectile. Striking energy can destroy the magnet or painful pinches to fingers. Always hold the magnet during mounting so it doesn't hit with great force against the steel surface. A collision at high speed ends with a crack of the neodymium. Wear safety glasses when playing with large magnets.

Table 9: Coating parameters (durability)
MW 55x25 / 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. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Electrical data (Flux)
MW 55x25 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	101 075 Mx	1010.7 µWb
P_c Coefficient	0.55	Low (Flat)

Flux value passing through the magnet pole. Essential parameter in coil applications and motors. P_c value determines the working geometry.

Table 11: Underwater work (magnet fishing)
MW 55x25 / N38

Environment	Effective steel pull	Effect
Air (land)	92.25 kg	Standard
Water (riverbed)	105.63 kg (+13.38 kg buoyancy gain)	+14.5%

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

In water, the magnet feels stronger thanks to Archimedes' principle. Buoyancy helps in lifting finds.

1. Shear force

*Note: On a vertical surface, the magnet holds just ~20% of its nominal pull.

2. Plate thickness effect

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

3. Temperature resistance

*For N38 material, 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) = 0.55

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. 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%

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: 010081-2026

Quick Unit Converter

Force (pull)

Force (N)

Force in lbs

Field Strength

Input your value in a single field to see the conversion for all other units right away.

Check out more products

Product available Ships today (order by 14:00)

HH 36x7.5 [M6] / N38 - through hole magnetic holder

38.90 zł brutto / pcs

Product available Ships today (order by 14:00)

UMP 94x28 [3xM10] GW F300 GOLD / N38 - search holder

200.00 zł brutto / pcs

Product available Ships today (order by 14:00)

UMP 107x40 [M8+M10] GW F 400 kg / N38 - search holder

400.00 zł brutto / pcs

Product available Ships today (order by 14:00)

NC NeoCube fi 5 mm kuleczki kolorowe / N38 - neocube

49.99 zł brutto / pcs

The offered product is a very strong cylinder magnet, composed of modern NdFeB material, which, with dimensions of Ø55x25 mm, guarantees maximum efficiency. The MW 55x25 / N38 component is characterized by a tolerance of ±0.1mm and professional build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 92.25 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.

This model is ideal for building generators, advanced sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the pull force of 904.94 N with a weight of only 445.47 g, this rod 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., 55.1 mm) using two-component epoxy glues. To ensure stability in automation, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.

Magnets N38 are strong enough for 90% of applications in automation and machine building, where excessive miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø55x25), 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 Ø55x25 mm, which, at a weight of 445.47 g, makes it an element with impressive magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 92.25 kg (force ~904.94 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.

This cylinder is magnetized axially (along the height of 25 mm), which means that the N and S poles are located on the flat, circular surfaces. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized diametrically if your project requires it.

Advantages as well as disadvantages of rare earth magnets.

Strengths

In addition to their magnetic capacity, neodymium magnets provide the following advantages:

They have constant strength, and over more than 10 years their performance decreases symbolically – ~1% (in testing),
They are noted for resistance to demagnetization induced by external disturbances,
Thanks to the shiny finish, the surface of Ni-Cu-Ni, gold, or silver-plated gives an aesthetic appearance,
They show high magnetic induction at the operating surface, which improves attraction properties,
Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
Thanks to the potential of accurate shaping and adaptation to individualized requirements, NdFeB magnets can be created in a broad palette of shapes and sizes, which expands the range of possible applications,
Key role in modern technologies – they serve a role in magnetic memories, brushless drives, advanced medical instruments, and complex engineering applications.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which allows their use in small systems

Weaknesses

Disadvantages of NdFeB magnets:

Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a steel housing, which not only secures them against impacts but also raises their durability
NdFeB 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 as well as 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
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 and corrosion.
Due to limitations in producing nuts and complex forms in magnets, we recommend using a housing - magnetic mount.
Potential hazard resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, small elements of these devices can complicate diagnosis medical after entering the body.
Due to expensive raw materials, their price is higher than average,

Lifting parameters

Maximum holding power of the magnet – what affects it?

Magnet power was defined for the most favorable conditions, assuming:

on a plate made of mild steel, optimally conducting the magnetic field
whose transverse dimension equals approx. 10 mm
with a plane perfectly flat
under conditions of gap-free contact (metal-to-metal)
for force acting at a right angle (pull-off, not shear)
in neutral thermal conditions

Key elements affecting lifting force

It is worth knowing that the working load may be lower depending on the following factors, in order of importance:

Gap between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
Steel thickness – too thin sheet causes magnetic saturation, causing part of the flux to be escaped to the other side.
Steel grade – the best choice is pure iron steel. Stainless steels may attract less.
Surface quality – the more even the surface, the better the adhesion and higher the lifting capacity. Unevenness acts like micro-gaps.
Temperature – heating the magnet causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity was determined using a polished steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, whereas under parallel forces the lifting capacity is smaller. Additionally, even a slight gap between the magnet and the plate decreases the lifting capacity.

Warnings

Magnetic media

Avoid bringing magnets close to a purse, computer, or screen. The magnetic field can permanently damage these devices and erase data from cards.

Hand protection

Danger of trauma: The attraction force is so great that it can result in blood blisters, crushing, and broken bones. Use thick gloves.

GPS Danger

A strong magnetic field negatively affects the operation of magnetometers in smartphones and GPS navigation. Do not bring magnets close to a smartphone to avoid damaging the sensors.

Flammability

Fire warning: Neodymium dust is explosive. Do not process magnets without safety gear as this may cause fire.

ICD Warning

Warning for patients: Strong magnetic fields disrupt medical devices. Maintain minimum 30 cm distance or ask another person to handle the magnets.

Nickel allergy

Allergy Notice: The nickel-copper-nickel coating contains nickel. If skin irritation appears, immediately stop working with magnets and use protective gear.

Safe operation

Before starting, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.

Beware of splinters

NdFeB magnets are ceramic materials, meaning they are prone to chipping. Impact of two magnets leads to them shattering into small pieces.

Choking Hazard

Only for adults. Small elements can be swallowed, causing serious injuries. Store out of reach of kids and pets.

Permanent damage

Control the heat. Exposing the magnet above 80 degrees Celsius will ruin its magnetic structure and strength.

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

MW 55x25 / N38 - cylindrical magnet

Technical of the product - MW 55x25 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering analysis of the assembly - report

Table 1: Static pull force (pull vs gap) - power drop MW 55x25 / N38

Table 2: Shear force (wall) MW 55x25 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces MW 55x25 / N38

Table 4: Steel thickness (saturation) - power losses MW 55x25 / N38

Table 5: Working in heat (stability) - power drop MW 55x25 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system MW 55x25 / N38

Table 7: Protective zones (implants) - precautionary measures MW 55x25 / N38

Table 8: Impact energy (kinetic energy) - collision effects MW 55x25 / N38

Table 9: Coating parameters (durability) MW 55x25 / N38

Table 10: Electrical data (Flux) MW 55x25 / N38

Table 11: Underwater work (magnet fishing) MW 55x25 / N38

1. Shear force

2. Plate thickness effect

3. Temperature resistance

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

Chemical composition

Environmental data

Force (pull)

Field Strength

Check out more products

HH 36x7.5 [M6] / N38 - through hole magnetic holder

UMP 94x28 [3xM10] GW F300 GOLD / N38 - search holder

UMP 107x40 [M8+M10] GW F 400 kg / N38 - search holder

NC NeoCube fi 5 mm kuleczki kolorowe / N38 - neocube

Advantages as well as disadvantages of rare earth magnets.

Strengths

Weaknesses

Lifting parameters

Maximum holding power of the magnet – what affects it?

Key elements affecting lifting force

Warnings

Magnetic media

Hand protection

GPS Danger

Flammability

ICD Warning

Nickel allergy

Safe operation

Beware of splinters

Choking Hazard

Permanent damage

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs gap) - power drop
MW 55x25 / N38

Table 2: Shear force (wall)
MW 55x25 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 55x25 / N38

Table 4: Steel thickness (saturation) - power losses
MW 55x25 / N38

Table 5: Working in heat (stability) - power drop
MW 55x25 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 55x25 / N38

Table 7: Protective zones (implants) - precautionary measures
MW 55x25 / N38

Table 8: Impact energy (kinetic energy) - collision effects
MW 55x25 / N38

Table 9: Coating parameters (durability)
MW 55x25 / N38

Table 10: Electrical data (Flux)
MW 55x25 / N38

Table 11: Underwater work (magnet fishing)
MW 55x25 / N38