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MW 40x8 / N38 - cylindrical magnet

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, Poland, 05-850, PL
Telephone: +48 22 499 98 98
Price range: PLN 1-6500
Rating: 5

cylindrical magnet

Catalog no 010069

GTIN/EAN: 5906301810681

5.00

Diameter Ø

40 mm [±0,1 mm]

Height

8 mm [±0,1 mm]

Weight

75.4 g

Magnetization Direction

↑ axial

Load capacity

20.43 kg / 200.39 N

Magnetic Induction

230.22 mT / 2302 Gs

Coating

[NiCuNi] Nickel

see technical specifications »

31.27 ZŁ with VAT / pcs + price for transport

25.42 ZŁ net + 23% VAT / pcs

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Product card - MW 40x8 / N38 - cylindrical magnet

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

properties

properties	values
Cat. no.	010069
GTIN/EAN	5906301810681
Production/Distribution	Dhit sp. z o.o. ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin	Poland / China / Germany
Customs code	85059029
Diameter Ø	40 mm [±0,1 mm]
Height	8 mm [±0,1 mm]
Weight	75.4 g
Magnetization Direction	↑ axial
Load capacity ~ ?	20.43 kg / 200.39 N
Magnetic Induction ~ ?	230.22 mT / 2302 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 40x8 / N38 - cylindrical magnet

properties	values	units
remenance Br [min. - max.] ?	12.2-12.6	kGs
remenance Br [min. - max.] ?	1220-1260	mT
coercivity bHc ?	10.8-11.5	kOe
coercivity bHc ?	860-915	kA/m
actual internal force iHc	≥ 12	kOe
actual internal force iHc	≥ 955	kA/m
energy density [min. - max.] ?	36-38	BH max MGOe
energy density [min. - max.] ?	287-303	BH max KJ/m
max. temperature ?	≤ 80	°C

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

properties	values	units
Vickers hardness	≥550	Hv
Density	≥7.4	g/cm³
Curie Temperature TC	312 - 380	°C
Curie Temperature TF	593 - 716	°F
Specific resistance	150	μΩ⋅cm
Bending strength	250	MPa
Compressive strength	1000~1100	MPa
Thermal expansion parallel (∥) to orientation (M)	(3-4) x 10^-6	°C^-1
Thermal expansion perpendicular (⊥) to orientation (M)	-(1-3) x 10^-6	°C^-1
Young's modulus	1.7 x 10⁴	kg/mm²

Physical analysis of the magnet - report

The following information represent the direct effect of a physical calculation. Results were calculated on models for the class Nd₂Fe₁₄B. Operational performance may differ. Use these data as a preliminary roadmap when designing systems.

Table 1: Static force (force vs distance) - power drop
MW 40x8 / N38

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

Magnetic force drops significantly with every subsequent millimeter of distance. Remember that even a microscopic distance (e.g., dirt, paint, veneer) significantly diminishes the holding power. Neodymiums operate optimally in perfect adhesion; air break weakens the power. See how flashily the parameters drop, when the magnet does not touch tightly to the metal substrate. When designing the mounting, eliminate redundant distances.

Table 2: Sliding capacity (wall)
MW 40x8 / N38

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

The following data calculates the estimated holding capacity sufficient to initiate the slippage of the magnet down along a upright metal surface (considering standard friction). The holding force depends on the air gap between the magnet and the metal.

Table 3: Vertical assembly (sliding) - vertical pull
MW 40x8 / N38

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

When placing a holder on a vertical plane (e.g., a car body), it will only hold just approx. 20%-30% of nominal attraction strength. Gravity as well as a low friction coefficient cause that products slip easier than they detach. Planning a hanger? Consider that the shear force is significantly lower than the perpendicular breakaway force. On a smooth steel, the magnet will slip down under a significantly smaller cargo. Application of an anti-slip pad can drastically improve the result.

Table 4: Steel thickness (saturation) - sheet metal selection
MW 40x8 / N38

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

A thin metal plate cannot take in the entire magnetic field, which weakens actual performance of the magnet. If you mount a strong magnet to a weak sheet, the field will pass right through and the attraction force will be weaker. To squeeze full efficiency of this neodymium's power, you require a sufficiently solid piece of metal. The material oversaturation causes that on delicate walls (e.g., car bodies), the holder shows lower pull force. We advise picking the steel cross-section based on the following data.

Table 5: Thermal resistance (stability) - resistance threshold
MW 40x8 / N38

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

Standard neodymium magnets lose power after exceeding the maximum temperature. Protect against heat – high temperature can permanently destroy this magnet. As the temperature rises, the neodymium's power briefly drops. Do not use this product near heat sources exceeding its working range. Ignoring the limit will cause destruction of magnetic properties.

*Technical advisory: Temperature resistance is determined by both grade, but also on the magnet's shape. Flat magnets (pancake types) risk losing magnetic properties under lower heat stress compared to rod magnets. The danger warning in the table points to permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 40x8 / N38

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

Two strong neodymiums interact from a wider radius than a magnet and sheet combination. Such a system of magnet-to-magnet generates a stronger field and a wider radius of performance. Planning to create a solid fastener? Utilize two neodymiums instead of a neodymium and a steel. Exercise caution that when bringing together two magnets, the impact force is massive. The repulsion force is slightly lower than the connection force, but still impressive.
*Field value in repulsion mode drops to ~0 Gs at the midpoint between the magnets (caused by magnetic field nullification).
Attention: Estimates apply to shear force of a pair of same neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Hazards (electronics) - precautionary measures
MW 40x8 / N38

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

Powerful magnet radiation is a real danger to IT equipment and pacemakers. These NdFeB products generate a flux that disrupts operation of digital equipment. Remember: the invisible magnetic field penetrates the body and housings. Exceptional care must be exercised by people with hearing aids and insulin pumps. The risk also applies to: automatic timepieces, car keys, speakers, and screens. Do not bring the product near payment cards, HDD media, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - collision effects
MW 40x8 / N38

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

Neodymium magnets are prone to chipping – a collision with steel risks their cracking. Pay attention to connection velocity – a magnet released freely turns into a projectile. Striking energy can destroy the magnet or painful pinches to fingers. Always hold the magnet during installation so it doesn't hit violently against the steel surface. A collision at high speed almost guarantees destruction of the neodymium. Wear safety glasses when playing with large magnets.

Table 9: Surface protection spec
MW 40x8 / N38

Technical parameter	Value / Description
Coating type	[NiCuNi] Nickel
Layer structure	Nickel - Copper - Nickel
Layer thickness	10-20 µm
Salt spray test (SST) ?	24 h
Recommended environment	Indoors only (dry)

The SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Note the thickness of the protective layer.

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

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

Total magnetic flux passing through the magnet pole. Key data for generator designers and motors. P_c value defines the working geometry.

Table 11: Underwater work (magnet fishing)
MW 40x8 / N38

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

Corrosion warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.

Contrary to myths, water does not block the magnetic field. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Sliding resistance

*Warning: On a vertical surface, the magnet retains just a fraction of its perpendicular strength.

2. Plate thickness effect

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

3. Power loss vs temp

*For N38 material, the critical limit 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.

Engineering data and GPSR

Material specification

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%

Ecology and recycling (GPSR)

recyclability (EoL)	100%
recycled raw materials	~10% (pre-cons)
carbon footprint	low / zredukowany
waste code (EWC)	16 02 16

Safety card (GPSR)

responsible entity

Dhit sp. z o.o.

ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki

tel: +48 22 499 98 98 | e-mail: bok@dhit.pl

batch number/type

id: 010069-2026

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MW 8x3 / N38 - cylindrical magnet

0.701 ZŁ brutto / pcs

This product is an incredibly powerful cylinder magnet, composed of advanced NdFeB material, which, with dimensions of Ø40x8 mm, guarantees maximum efficiency. This specific item is characterized by an accuracy of ±0.1mm and professional build quality, making it an ideal solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 20.43 kg), this product is in stock from our warehouse in Poland, ensuring rapid order fulfillment. Additionally, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.

It successfully proves itself in DIY projects, advanced robotics, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 200.39 N with a weight of only 75.4 g, this cylindrical magnet is indispensable in electronics and wherever low weight is crucial.

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

Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering an optimal price-to-power ratio and operational stability. If you need even stronger magnets in the same volume (Ø40x8), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.

This model is characterized by dimensions Ø40x8 mm, which, at a weight of 75.4 g, makes it an element with impressive magnetic energy density. The key parameter here is the holding force amounting to approximately 20.43 kg (force ~200.39 N), which, with such defined dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.

This cylinder is magnetized axially (along the height of 8 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.

Strengths as well as weaknesses of neodymium magnets.

Pros

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

They do not lose magnetism, even during approximately ten years – the drop in power is only ~1% (based on measurements),
Magnets perfectly defend themselves against loss of magnetization caused by ambient magnetic noise,
Thanks to the shimmering finish, the coating of nickel, gold, or silver gives an clean appearance,
They are known for high magnetic induction at the operating surface, which improves attraction properties,
Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
Possibility of detailed creating as well as adjusting to atypical applications,
Key role in modern industrial fields – they serve a role in mass storage devices, brushless drives, advanced medical instruments, also technologically advanced constructions.
Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Weaknesses

Cons of neodymium magnets and proposals for their use:

They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only protects the magnet but also increases its resistance to damage
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.
They oxidize in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
Due to limitations in producing nuts and complicated forms in magnets, we propose using casing - magnetic holder.
Health risk related to microscopic parts of magnets are risky, in case of ingestion, which becomes key in the context of child health protection. Additionally, small elements of these devices are able to complicate diagnosis medical after entering the body.
Due to neodymium price, their price is relatively high,

Lifting parameters

Highest magnetic holding force – what contributes to it?

The load parameter shown concerns the limit force, recorded under ideal test conditions, namely:

on a plate made of mild steel, optimally conducting the magnetic flux
with a thickness minimum 10 mm
characterized by even structure
under conditions of no distance (metal-to-metal)
under axial application of breakaway force (90-degree angle)
in stable room temperature

Impact of factors on magnetic holding capacity in practice

Real force is influenced by specific conditions, mainly (from most important):

Distance – the presence of any layer (rust, dirt, air) acts as an insulator, which reduces power steeply (even by 50% at 0.5 mm).
Direction of force – highest force is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is standardly many times lower (approx. 1/5 of the lifting capacity).
Plate thickness – insufficiently thick steel causes magnetic saturation, causing part of the flux to be lost into the air.
Steel grade – ideal substrate is pure iron steel. Stainless steels may have worse magnetic properties.
Plate texture – ground elements ensure maximum contact, which increases force. Rough surfaces weaken the grip.
Temperature – heating the magnet results in weakening of induction. Check the maximum operating temperature for a given model.

Lifting capacity was measured with the use of a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, in contrast under attempts to slide the magnet the holding force is lower. In addition, even a minimal clearance between the magnet and the plate decreases the holding force.

Precautions when working with NdFeB magnets

No play value

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

Conscious usage

Before starting, read the rules. Sudden snapping can break the magnet or injure your hand. Be predictive.

Fire risk

Mechanical processing of NdFeB material carries a risk of fire hazard. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Pacemakers

Patients with a pacemaker must maintain an safe separation from magnets. The magnetism can stop the functioning of the life-saving device.

Electronic hazard

Avoid bringing magnets near a wallet, laptop, or screen. The magnetic field can irreversibly ruin these devices and erase data from cards.

Warning for allergy sufferers

Medical facts indicate that nickel (the usual finish) is a strong allergen. If your skin reacts to metals, refrain from touching magnets with bare hands or opt for versions in plastic housing.

Magnet fragility

NdFeB magnets are sintered ceramics, which means they are fragile like glass. Clashing of two magnets will cause them cracking into shards.

Permanent damage

Standard neodymium magnets (N-type) undergo demagnetization when the temperature surpasses 80°C. The loss of strength is permanent.

Threat to navigation

GPS units and smartphones are extremely susceptible to magnetic fields. Direct contact with a strong magnet can permanently damage the sensors in your phone.

Crushing force

Mind your fingers. Two powerful magnets will join instantly with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!

Warning! Details about risks in the article: Magnet Safety Guide.

MW 40x8 / N38 - cylindrical magnet

Product card - MW 40x8 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical analysis of the magnet - report

Table 1: Static force (force vs distance) - power drop MW 40x8 / N38

Table 2: Sliding capacity (wall) MW 40x8 / N38

Table 3: Vertical assembly (sliding) - vertical pull MW 40x8 / N38

Table 4: Steel thickness (saturation) - sheet metal selection MW 40x8 / N38

Table 5: Thermal resistance (stability) - resistance threshold MW 40x8 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system MW 40x8 / N38

Table 7: Hazards (electronics) - precautionary measures MW 40x8 / N38

Table 8: Collisions (cracking risk) - collision effects MW 40x8 / N38

Table 9: Surface protection spec MW 40x8 / N38

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

Table 11: Underwater work (magnet fishing) MW 40x8 / N38

1. Sliding resistance

2. Plate thickness effect

3. Power loss vs temp

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

Material specification

Ecology and recycling (GPSR)

Pulling force

Magnetic Induction

Other offers

AM ucho [M12] - magnetic accessories

MPL 20x8x6 / N38 - lamellar magnet

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

MW 8x3 / N38 - cylindrical magnet

Strengths as well as weaknesses of neodymium magnets.

Pros

Weaknesses

Lifting parameters

Highest magnetic holding force – what contributes to it?

Impact of factors on magnetic holding capacity in practice

Precautions when working with NdFeB magnets

No play value

Conscious usage

Fire risk

Pacemakers

Electronic hazard

Warning for allergy sufferers

Magnet fragility

Permanent damage

Threat to navigation

Crushing force

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs distance) - power drop
MW 40x8 / N38

Table 2: Sliding capacity (wall)
MW 40x8 / N38

Table 3: Vertical assembly (sliding) - vertical pull
MW 40x8 / N38

Table 4: Steel thickness (saturation) - sheet metal selection
MW 40x8 / N38

Table 5: Thermal resistance (stability) - resistance threshold
MW 40x8 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 40x8 / N38

Table 7: Hazards (electronics) - precautionary measures
MW 40x8 / N38

Table 8: Collisions (cracking risk) - collision effects
MW 40x8 / N38

Table 9: Surface protection spec
MW 40x8 / N38

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

Table 11: Underwater work (magnet fishing)
MW 40x8 / N38