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MW 25x5 / N38AH - 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 010501

GTIN/EAN: 5906301814993

Diameter Ø

25 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

18.41 g

Magnetization Direction

↑ axial

Load capacity

7.29 kg / 71.47 N

Magnetic Induction

219.99 mT / 2200 Gs

Coating

[NiCuNi] Nickel

technical specifications »

16.68 ZŁ with VAT / pcs + price for transport

13.56 ZŁ net + 23% VAT / pcs

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Technical - MW 25x5 / N38AH - cylindrical magnet

Specification / characteristics - MW 25x5 / N38AH - cylindrical magnet

properties

properties	values
Cat. no.	010501
GTIN/EAN	5906301814993
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	25 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	18.41 g
Magnetization Direction	↑ axial
Load capacity ~ ?	7.29 kg / 71.47 N
Magnetic Induction ~ ?	219.99 mT / 2200 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38AH

Specification / characteristics MW 25x5 / N38AH - cylindrical magnet

properties	values	units
remenance Br [min. - max.] ?	12.2-12.5	kGs
remenance Br [min. - max.] ?	1120-1250	mT
coercivity bHc ?	≥ 11.3	kOe
coercivity bHc ?	≥ 899	kA/m
actual internal force iHc	≥ 33	kOe
actual internal force iHc	≥ 2624	kA/m
energy density [min. - max.] ?	36-39	BH max MGOe
energy density [min. - max.] ?	287-310	BH max KJ/m
max. temperature ?	≤ 230	°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 analysis of the magnet - technical parameters

The following data constitute the direct effect of a physical calculation. Results are based on algorithms for the class Nd₂Fe₁₄B. Actual parameters might slightly deviate from the simulation results. Treat these data as a preliminary roadmap when designing systems.

Table 1: Static pull force (pull vs gap) - characteristics
MW 25x5 / N38AH

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2292 Gs 229.2 mT	7.29 kg / 16.07 LBS 7290.0 g / 71.5 N	strong
1 mm	2180 Gs 218.0 mT	6.59 kg / 14.53 LBS 6591.0 g / 64.7 N	strong
2 mm	2042 Gs 204.2 mT	5.78 kg / 12.75 LBS 5782.0 g / 56.7 N	strong
3 mm	1888 Gs 188.8 mT	4.94 kg / 10.90 LBS 4942.8 g / 48.5 N	strong
5 mm	1564 Gs 156.4 mT	3.39 kg / 7.48 LBS 3394.1 g / 33.3 N	strong
10 mm	886 Gs 88.6 mT	1.09 kg / 2.40 LBS 1089.7 g / 10.7 N	safe
15 mm	493 Gs 49.3 mT	0.34 kg / 0.74 LBS 336.7 g / 3.3 N	safe
20 mm	287 Gs 28.7 mT	0.11 kg / 0.25 LBS 114.0 g / 1.1 N	safe
30 mm	115 Gs 11.5 mT	0.02 kg / 0.04 LBS 18.4 g / 0.2 N	safe
50 mm	31 Gs 3.1 mT	0.00 kg / 0.00 LBS 1.3 g / 0.0 N	safe

Grip strength decreases sharply with every mm of distance. Remember that every additional insulation layer (e.g., contamination, varnish, rust) noticeably weakens the grip. Magnets work optimally in perfect adhesion; distance drastically cuts the force. See how rapidly the parameters plummet, when the magnet does not touch directly to the metal substrate. When calculating the assembly, discard redundant distances.

Table 2: Slippage hold (wall)
MW 25x5 / N38AH

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.46 kg / 3.21 LBS 1458.0 g / 14.3 N
1 mm	Stal (~0.2)	1.32 kg / 2.91 LBS 1318.0 g / 12.9 N
2 mm	Stal (~0.2)	1.16 kg / 2.55 LBS 1156.0 g / 11.3 N
3 mm	Stal (~0.2)	0.99 kg / 2.18 LBS 988.0 g / 9.7 N
5 mm	Stal (~0.2)	0.68 kg / 1.49 LBS 678.0 g / 6.7 N
10 mm	Stal (~0.2)	0.22 kg / 0.48 LBS 218.0 g / 2.1 N
15 mm	Stal (~0.2)	0.07 kg / 0.15 LBS 68.0 g / 0.7 N
20 mm	Stal (~0.2)	0.02 kg / 0.05 LBS 22.0 g / 0.2 N
30 mm	Stal (~0.2)	0.00 kg / 0.01 LBS 4.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N

This section presents the estimated shear load necessary to cause the sliding of the magnet down along a vertical steel plate (considering typical friction). This value depends on the gap size between the magnet and the metal.

Table 3: Wall mounting (shearing) - vertical pull
MW 25x5 / N38AH

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.19 kg / 4.82 LBS 2187.0 g / 21.5 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.46 kg / 3.21 LBS 1458.0 g / 14.3 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.73 kg / 1.61 LBS 729.0 g / 7.2 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.65 kg / 8.04 LBS 3645.0 g / 35.8 N

When placing a holder on a upright plane (e.g., a board), it you can count on barely approx. 1/5 of its nominal power. Gravitational force as well as a low friction coefficient influence the fact that products slide down easier than they detach. Want to create a wall mount? Consider that the shear force is much weaker than the maximum static pull force. On a slippery surface, the element will slide down under a noticeably lighter load. Utilizing a rubberized pad can significantly increase the grip.

Table 4: Material efficiency (saturation) - power losses
MW 25x5 / N38AH

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.73 kg / 1.61 LBS 729.0 g / 7.2 N
1 mm	25%	1.82 kg / 4.02 LBS 1822.5 g / 17.9 N
2 mm	50%	3.65 kg / 8.04 LBS 3645.0 g / 35.8 N
3 mm	75%	5.47 kg / 12.05 LBS 5467.5 g / 53.6 N
5 mm	100%	7.29 kg / 16.07 LBS 7290.0 g / 71.5 N
10 mm	100%	7.29 kg / 16.07 LBS 7290.0 g / 71.5 N
11 mm	100%	7.29 kg / 16.07 LBS 7290.0 g / 71.5 N
12 mm	100%	7.29 kg / 16.07 LBS 7290.0 g / 71.5 N

A too thin steel cannot take in the full magnetic flux, which weakens actual performance of the magnet. Should you mount a strong magnet to a thin surface, the magnetism will penetrate right through and the pull force will drop sharply. To achieve the maximum of this neodymium's power, you need a suitably thick backing of metal. The saturation phenomenon means that on sheet metal structures (e.g., car bodies), the magnet holds weaker. We suggest choosing the steel thickness from these parameters.

Table 5: Working in heat (material behavior) - power drop
MW 25x5 / N38AH

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	7.29 kg / 16.07 LBS 7290.0 g / 71.5 N	OK
80 °C	-6.6%	6.81 kg / 15.01 LBS 6808.9 g / 66.8 N
150 °C	-14.3%	6.25 kg / 13.77 LBS 6247.5 g / 61.3 N
200 °C	-19.8%	5.85 kg / 12.89 LBS 5846.6 g / 57.4 N
230 °C	-23.1%	5.61 kg / 12.36 LBS 5606.0 g / 55.0 N
250 °C	-45.3%	3.99 kg / 8.79 LBS 3987.6 g / 39.1 N

Standard neodymium magnets irreversibly lose power after exceeding the maximum temperature. Avoid high temperatures – high temperature can irreversibly demagnetize this product. With every degree above norm, the magnet's power temporarily drops. Do not use this magnet close to heaters exceeding its working range. Ignoring the limit will cause destruction of magnetic properties.

*Technical advisory: Temperature resistance depends not only on the material grade, and the Permeance Coefficient Pc. Low-profile magnets (low permeance coefficient) are more susceptible to demagnetization at lower temperatures than taller cylinders. Warning indicator in the table indicates permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 25x5 / N38AH

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Strength (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	15.90 kg / 35.06 LBS 3 855 Gs	2.39 kg / 5.26 LBS 2385 g / 23.4 N	N/A
1 mm	15.19 kg / 33.48 LBS 4 480 Gs	2.28 kg / 5.02 LBS 2278 g / 22.3 N	13.67 kg / 30.13 LBS ~0 Gs
2 mm	14.38 kg / 31.70 LBS 4 359 Gs	2.16 kg / 4.75 LBS 2157 g / 21.2 N	12.94 kg / 28.53 LBS ~0 Gs
3 mm	13.51 kg / 29.79 LBS 4 226 Gs	2.03 kg / 4.47 LBS 2027 g / 19.9 N	12.16 kg / 26.81 LBS ~0 Gs
5 mm	11.70 kg / 25.79 LBS 3 932 Gs	1.75 kg / 3.87 LBS 1755 g / 17.2 N	10.53 kg / 23.21 LBS ~0 Gs
10 mm	7.40 kg / 16.32 LBS 3 128 Gs	1.11 kg / 2.45 LBS 1111 g / 10.9 N	6.66 kg / 14.69 LBS ~0 Gs
20 mm	2.38 kg / 5.24 LBS 1 773 Gs	0.36 kg / 0.79 LBS 357 g / 3.5 N	2.14 kg / 4.72 LBS ~0 Gs
50 mm	0.09 kg / 0.21 LBS 354 Gs	0.01 kg / 0.03 LBS 14 g / 0.1 N	0.09 kg / 0.19 LBS ~0 Gs
60 mm	0.04 kg / 0.09 LBS 231 Gs	0.01 kg / 0.01 LBS 6 g / 0.1 N	0.04 kg / 0.08 LBS ~0 Gs
70 mm	0.02 kg / 0.04 LBS 157 Gs	0.00 kg / 0.01 LBS 3 g / 0.0 N	0.02 kg / 0.04 LBS ~0 Gs
80 mm	0.01 kg / 0.02 LBS 112 Gs	0.00 kg / 0.00 LBS 1 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
90 mm	0.01 kg / 0.01 LBS 82 Gs	0.00 kg / 0.00 LBS 1 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
100 mm	0.00 kg / 0.01 LBS 62 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs

Two magnetic products interact from a significantly greater distance than a neodymium and metal setup. Such a system of magnet-to-magnet creates a more powerful interaction and a further horizon of action. Want to build a powerful holder? Use a pair of magnets instead of a neodymium and a steel. Exercise caution that when connecting a pair of magnets, the impact force is extreme. The repulsion force is a bit weaker than the attraction, but still impressive.
*Field value for N-N configuration drops to ~0 Gs in the exact middle between the magnets (resulting from vector opposition).
* Estimates demonstrate friction force of dual identical magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Hazards (implants) - warnings
MW 25x5 / N38AH

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	10.0 cm
Hearing aid	10 Gs (1.0 mT)	7.5 cm
Timepiece	20 Gs (2.0 mT)	6.0 cm
Phone / Smartphone	40 Gs (4.0 mT)	5.0 cm
Remote	50 Gs (5.0 mT)	4.5 cm
Payment card	400 Gs (40.0 mT)	2.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.5 cm

Extremely neodym field is a real danger to electronic devices and pacemakers. These magnets generate a flux that prevents correct functioning of digital equipment. Notice: the unseen radiation passes through tissues and plastic. Exceptional care must be taken by people with hearing aids and drug dispensers. Also at risk are: mechanical watches, remotes, membranes, and screens. Do not place the magnet near cards, hard drives, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - collision effects
MW 25x5 / N38AH

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	21.86 km/h (6.07 m/s)	0.34 J
30 mm	34.81 km/h (9.67 m/s)	0.86 J
50 mm	44.88 km/h (12.47 m/s)	1.43 J
100 mm	63.46 km/h (17.63 m/s)	2.86 J

Neodymium magnets are delicate – a strong collision with metal causes immediate chipping. Pay attention to connection velocity – a magnet released freely turns into a projectile. Striking energy can destroy the magnet or painful pinches to skin. Be sure to control the product during mounting so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h ends with a crack of the neodymium. Wear safety glasses when working with large magnets.

Table 9: Surface protection spec
MW 25x5 / N38AH

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 SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction data (P_c)
MW 25x5 / N38AH

Parameter	Value	SI Unit / Description
Magnetic Flux	13 054 Mx	130.5 µWb
P_c Coefficient	0.29	Low (Flat)

Flux value emitted by the magnet pole. Essential parameter for generator designers and motors. P_c value defines the magnet's operating point.

Table 11: Submerged application
MW 25x5 / N38AH

Environment	Effective steel pull	Effect
Air (land)	7.29 kg	Standard
Water (riverbed)	8.35 kg (+1.06 kg buoyancy gain)	+14.5%

Corrosion 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 retains merely approx. 20-30% of its max power.

2. Steel saturation

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

3. Heat tolerance

*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) = 0.29

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 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%

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: 010501-2026

Measurement Calculator

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This product is an incredibly powerful cylindrical magnet, made from durable NdFeB material, which, with dimensions of Ø25x5 mm, guarantees the highest energy density. The MW 25x5 / N38AH component boasts a tolerance of ±0.1mm and professional build quality, making it an ideal solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 7.29 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring quick order fulfillment. Additionally, its Ni-Cu-Ni coating secures 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 high power of 71.47 N with a weight of only 18.41 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.

Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 25.1 mm) using two-component epoxy glues. To ensure long-term durability in industry, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.

Grade N38 is the most frequently chosen standard for industrial neodymium magnets, offering an optimal price-to-power ratio and operational stability. If you need the strongest magnets in the same volume (Ø25x5), 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 Ø25x5 mm, which, at a weight of 18.41 g, makes it an element with high magnetic energy density. The value of 71.47 N means that the magnet is capable of holding a weight many times exceeding its own mass of 18.41 g. 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 25 mm. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized diametrically if your project requires it.

Strengths and weaknesses of rare earth magnets.

Strengths

Besides their magnetic performance, neodymium magnets are valued for these benefits:

They do not lose strength, even over around ten years – the drop in strength is only ~1% (based on measurements),
Magnets effectively protect themselves against loss of magnetization caused by ambient magnetic noise,
In other words, due to the reflective layer of silver, the element looks attractive,
The surface of neodymium magnets generates a strong magnetic field – this is a distinguishing feature,
Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
Thanks to versatility in constructing and the ability to modify to client solutions,
Key role in high-tech industry – they serve a role in magnetic memories, electromotive mechanisms, diagnostic systems, as well as complex engineering applications.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Disadvantages of neodymium magnets:

Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a strong case, which not only protects them against impacts but also raises their durability
We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
Magnets exposed to a humid environment can rust. Therefore while using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
We recommend cover - magnetic mechanism, due to difficulties in producing threads inside the magnet and complex shapes.
Possible danger resulting from small fragments of magnets can be dangerous, if swallowed, which becomes key in the context of child safety. Furthermore, small components of these devices are able to complicate diagnosis medical in case of swallowing.
Due to expensive raw materials, their price is higher than average,

Holding force characteristics

Highest magnetic holding force – what it depends on?

Magnet power was determined for optimal configuration, including:

with the application of a sheet made of special test steel, guaranteeing full magnetic saturation
whose transverse dimension equals approx. 10 mm
with a plane perfectly flat
without any clearance between the magnet and steel
for force applied at a right angle (pull-off, not shear)
in neutral thermal conditions

Determinants of practical lifting force of a magnet

Holding efficiency is affected by specific conditions, mainly (from priority):

Distance (between the magnet and the metal), as even a very small distance (e.g. 0.5 mm) can cause a drastic drop in lifting capacity by up to 50% (this also applies to varnish, corrosion or debris).
Loading method – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet holds much less (often approx. 20-30% of maximum force).
Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
Material type – ideal substrate is pure iron steel. Cast iron may generate lower lifting capacity.
Smoothness – full contact is obtained only on polished steel. Any scratches and bumps reduce the real contact area, reducing force.
Thermal factor – high temperature weakens magnetic field. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate decreases the load capacity.

H&S for magnets

Skin irritation risks

Some people have a sensitization to nickel, which is the common plating for NdFeB magnets. Prolonged contact can result in a rash. We strongly advise use safety gloves.

Conscious usage

Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Think ahead.

Power loss in heat

Keep cool. Neodymium magnets are sensitive to heat. If you require resistance above 80°C, inquire about special high-temperature series (H, SH, UH).

Keep away from computers

Powerful magnetic fields can destroy records on credit cards, hard drives, and other magnetic media. Keep a distance of at least 10 cm.

Material brittleness

Neodymium magnets are sintered ceramics, which means they are prone to chipping. Clashing of two magnets will cause them cracking into shards.

GPS and phone interference

Navigation devices and smartphones are highly susceptible to magnetic fields. Direct contact with a powerful NdFeB magnet can ruin the internal compass in your phone.

Pacemakers

Individuals with a heart stimulator have to keep an safe separation from magnets. The magnetic field can interfere with the functioning of the implant.

Hand protection

Pinching hazard: The pulling power is so immense that it can cause blood blisters, pinching, and broken bones. Use thick gloves.

Product not for children

Only for adults. Tiny parts pose a choking risk, leading to intestinal necrosis. Keep out of reach of kids and pets.

Do not drill into magnets

Powder produced during cutting of magnets is flammable. Do not drill into magnets without proper cooling and knowledge.

Caution! Learn more about hazards in the article: Magnet Safety Guide.

MW 25x5 / N38AH - cylindrical magnet

Technical - MW 25x5 / N38AH - cylindrical magnet

Magnetic properties of material N38AH

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering analysis of the magnet - technical parameters

Table 1: Static pull force (pull vs gap) - characteristics MW 25x5 / N38AH

Table 2: Slippage hold (wall) MW 25x5 / N38AH

Table 3: Wall mounting (shearing) - vertical pull MW 25x5 / N38AH

Table 4: Material efficiency (saturation) - power losses MW 25x5 / N38AH

Table 5: Working in heat (material behavior) - power drop MW 25x5 / N38AH

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system MW 25x5 / N38AH

Table 7: Hazards (implants) - warnings MW 25x5 / N38AH

Table 8: Collisions (cracking risk) - collision effects MW 25x5 / N38AH

Table 9: Surface protection spec MW 25x5 / N38AH

Table 10: Construction data (Pc) MW 25x5 / N38AH

Table 11: Submerged application MW 25x5 / N38AH

1. Vertical hold

2. Steel saturation

3. Heat tolerance

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

Elemental analysis

Sustainability

Force (pull)

Field Strength

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Strengths and weaknesses of rare earth magnets.

Strengths

Cons

Holding force characteristics

Highest magnetic holding force – what it depends on?

Determinants of practical lifting force of a magnet

H&S for magnets

Skin irritation risks

Conscious usage

Power loss in heat

Keep away from computers

Material brittleness

GPS and phone interference

Pacemakers

Hand protection

Product not for children

Do not drill into magnets

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs gap) - characteristics
MW 25x5 / N38AH

Table 2: Slippage hold (wall)
MW 25x5 / N38AH

Table 3: Wall mounting (shearing) - vertical pull
MW 25x5 / N38AH

Table 4: Material efficiency (saturation) - power losses
MW 25x5 / N38AH

Table 5: Working in heat (material behavior) - power drop
MW 25x5 / N38AH

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 25x5 / N38AH

Table 7: Hazards (implants) - warnings
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Table 8: Collisions (cracking risk) - collision effects
MW 25x5 / N38AH

Table 9: Surface protection spec
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Table 10: Construction data (P_c)
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Table 11: Submerged application
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