Product available Ships tomorrow

MW 40x15 / 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 010067

GTIN/EAN: 5906301810667

Diameter Ø

40 mm [±0,1 mm]

Height

15 mm [±0,1 mm]

Weight

141.37 g

Magnetization Direction

↑ axial

Load capacity

42.64 kg / 418.33 N

Magnetic Induction

371.91 mT / 3719 Gs

Coating

[NiCuNi] Nickel

see technical specifications »

65.93 ZŁ with VAT / pcs + price for transport

53.60 ZŁ net + 23% VAT / pcs

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Technical details - MW 40x15 / N38 - cylindrical magnet

Specification / characteristics - MW 40x15 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010067
GTIN/EAN	5906301810667
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	15 mm [±0,1 mm]
Weight	141.37 g
Magnetization Direction	↑ axial
Load capacity ~ ?	42.64 kg / 418.33 N
Magnetic Induction ~ ?	371.91 mT / 3719 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 40x15 / N38 - cylindrical magnet

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

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

Engineering analysis of the product - report

Presented information are the outcome of a engineering calculation. Values rely on algorithms for the material Nd₂Fe₁₄B. Operational conditions may deviate from the simulation results. Use these calculations as a preliminary roadmap when designing systems.

Table 1: Static pull force (force vs gap) - characteristics
MW 40x15 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	3718 Gs 371.8 mT	42.64 kg / 94.00 lbs 42640.0 g / 418.3 N	crushing
1 mm	3563 Gs 356.3 mT	39.16 kg / 86.33 lbs 39159.5 g / 384.2 N	crushing
2 mm	3398 Gs 339.8 mT	35.62 kg / 78.52 lbs 35617.1 g / 349.4 N	crushing
3 mm	3228 Gs 322.8 mT	32.13 kg / 70.84 lbs 32130.5 g / 315.2 N	crushing
5 mm	2880 Gs 288.0 mT	25.58 kg / 56.40 lbs 25584.2 g / 251.0 N	crushing
10 mm	2069 Gs 206.9 mT	13.20 kg / 29.09 lbs 13196.7 g / 129.5 N	crushing
15 mm	1439 Gs 143.9 mT	6.38 kg / 14.07 lbs 6383.1 g / 62.6 N	strong
20 mm	999 Gs 99.9 mT	3.08 kg / 6.79 lbs 3077.9 g / 30.2 N	strong
30 mm	507 Gs 50.7 mT	0.79 kg / 1.75 lbs 792.4 g / 7.8 N	safe
50 mm	169 Gs 16.9 mT	0.09 kg / 0.19 lbs 88.4 g / 0.9 N	safe

Pulling power weakens significantly with every subsequent millimeter of spacing. Remember that even the smallest gap (e.g., contamination, varnish, rust) noticeably diminishes the holding power. Magnets operate optimally in perfect adhesion; gap drastically cuts the power. Notice how quickly the pull force fall, when the product does not adhere flatly to the metal substrate. When designing the mounting, discard additional spacers.

Table 2: Shear hold (vertical surface)
MW 40x15 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	8.53 kg / 18.80 lbs 8528.0 g / 83.7 N
1 mm	Stal (~0.2)	7.83 kg / 17.27 lbs 7832.0 g / 76.8 N
2 mm	Stal (~0.2)	7.12 kg / 15.71 lbs 7124.0 g / 69.9 N
3 mm	Stal (~0.2)	6.43 kg / 14.17 lbs 6426.0 g / 63.0 N
5 mm	Stal (~0.2)	5.12 kg / 11.28 lbs 5116.0 g / 50.2 N
10 mm	Stal (~0.2)	2.64 kg / 5.82 lbs 2640.0 g / 25.9 N
15 mm	Stal (~0.2)	1.28 kg / 2.81 lbs 1276.0 g / 12.5 N
20 mm	Stal (~0.2)	0.62 kg / 1.36 lbs 616.0 g / 6.0 N
30 mm	Stal (~0.2)	0.16 kg / 0.35 lbs 158.0 g / 1.5 N
50 mm	Stal (~0.2)	0.02 kg / 0.04 lbs 18.0 g / 0.2 N

The following data shows the theoretical force sufficient to start the shifting of the magnet downwards along a vertical steel wall (assuming standard friction coefficient). The holding force is relative to the distance between the magnet and the surface.

Table 3: Wall mounting (shearing) - vertical pull
MW 40x15 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	12.79 kg / 28.20 lbs 12792.0 g / 125.5 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	8.53 kg / 18.80 lbs 8528.0 g / 83.7 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	4.26 kg / 9.40 lbs 4264.0 g / 41.8 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	21.32 kg / 47.00 lbs 21320.0 g / 209.1 N

When placing a holder on a upright surface (e.g., a car body), it you can count on just about 1/5 of its maximum pull force. Gravity as well as a low friction coefficient cause that magnets slip easier than they detach. Planning a wall mount? Consider that the sliding force is significantly lower than the maximum static pull force. On a painted metal, the magnet will slip down under a significantly smaller load. Utilizing a rubberized layer can significantly raise the stability.

Table 4: Steel thickness (saturation) - sheet metal selection
MW 40x15 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	5%	2.13 kg / 4.70 lbs 2132.0 g / 20.9 N
1 mm	13%	5.33 kg / 11.75 lbs 5330.0 g / 52.3 N
2 mm	25%	10.66 kg / 23.50 lbs 10660.0 g / 104.6 N
3 mm	38%	15.99 kg / 35.25 lbs 15990.0 g / 156.9 N
5 mm	63%	26.65 kg / 58.75 lbs 26650.0 g / 261.4 N
10 mm	100%	42.64 kg / 94.00 lbs 42640.0 g / 418.3 N
11 mm	100%	42.64 kg / 94.00 lbs 42640.0 g / 418.3 N
12 mm	100%	42.64 kg / 94.00 lbs 42640.0 g / 418.3 N

A too thin steel is not enough to focus the entire magnetic field, which wastes potential of the magnet. If you mount a strong magnet to a thin surface, the flux will penetrate right through and the pull force will drop sharply. To squeeze 100% of this magnet's potential, you require a sufficiently solid backing of steel. The saturation phenomenon causes that on sheet metal structures (e.g., thin profiles), the holder holds weaker. We recommend selecting the steel dimension according to the table below.

Table 5: Working in heat (material behavior) - thermal limit
MW 40x15 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	42.64 kg / 94.00 lbs 42640.0 g / 418.3 N	OK
40 °C	-2.2%	41.70 kg / 91.94 lbs 41701.9 g / 409.1 N	OK
60 °C	-4.4%	40.76 kg / 89.87 lbs 40763.8 g / 399.9 N
80 °C	-6.6%	39.83 kg / 87.80 lbs 39825.8 g / 390.7 N
100 °C	-28.8%	30.36 kg / 66.93 lbs 30359.7 g / 297.8 N

Standard neodymium magnets irreversibly lose parameters past the thermal threshold. Watch out for overheating – heat can irreversibly demagnetize this magnet. As the temperature rises, the magnet's force temporarily decreases. Refrain from using this magnet close to heaters higher than its operating temperature limit. Ignoring the limit will lead to irreversible degradation of magnetic properties.

*Engineering note: Heat tolerance is determined by both grade, as well as the dimension ratios. Thin magnets (pancake types) may lose charge permanently under lower heat stress compared to rod magnets. The danger warning in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (repulsion) - field collision
MW 40x15 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	107.12 kg / 236.16 lbs 5 156 Gs	16.07 kg / 35.42 lbs 16068 g / 157.6 N	N/A
1 mm	102.82 kg / 226.67 lbs 7 286 Gs	15.42 kg / 34.00 lbs 15422 g / 151.3 N	92.53 kg / 204.00 lbs ~0 Gs
2 mm	98.38 kg / 216.89 lbs 7 127 Gs	14.76 kg / 32.53 lbs 14757 g / 144.8 N	88.54 kg / 195.20 lbs ~0 Gs
3 mm	93.92 kg / 207.06 lbs 6 964 Gs	14.09 kg / 31.06 lbs 14088 g / 138.2 N	84.53 kg / 186.36 lbs ~0 Gs
5 mm	85.07 kg / 187.55 lbs 6 627 Gs	12.76 kg / 28.13 lbs 12760 g / 125.2 N	76.56 kg / 168.79 lbs ~0 Gs
10 mm	64.27 kg / 141.70 lbs 5 761 Gs	9.64 kg / 21.25 lbs 9641 g / 94.6 N	57.85 kg / 127.53 lbs ~0 Gs
20 mm	33.15 kg / 73.09 lbs 4 137 Gs	4.97 kg / 10.96 lbs 4973 g / 48.8 N	29.84 kg / 65.78 lbs ~0 Gs
50 mm	3.84 kg / 8.47 lbs 1 408 Gs	0.58 kg / 1.27 lbs 576 g / 5.7 N	3.46 kg / 7.62 lbs ~0 Gs
60 mm	1.99 kg / 4.39 lbs 1 014 Gs	0.30 kg / 0.66 lbs 299 g / 2.9 N	1.79 kg / 3.95 lbs ~0 Gs
70 mm	1.08 kg / 2.38 lbs 747 Gs	0.16 kg / 0.36 lbs 162 g / 1.6 N	0.97 kg / 2.14 lbs ~0 Gs
80 mm	0.61 kg / 1.35 lbs 563 Gs	0.09 kg / 0.20 lbs 92 g / 0.9 N	0.55 kg / 1.22 lbs ~0 Gs
90 mm	0.36 kg / 0.80 lbs 432 Gs	0.05 kg / 0.12 lbs 54 g / 0.5 N	0.33 kg / 0.72 lbs ~0 Gs
100 mm	0.22 kg / 0.49 lbs 339 Gs	0.03 kg / 0.07 lbs 33 g / 0.3 N	0.20 kg / 0.44 lbs ~0 Gs

Two magnetic products interact from a much further distance than a magnet and steel combination. The connection of two magnets creates a more powerful interaction and a wider radius of performance. Planning to create a powerful holder? Utilize two neodymiums instead of a neodymium and a steel. Be careful that when attracting two neodymiums, the collision energy is extreme. The repulsion force is slightly lower than the connection force, but still impressive.
*Flux density in repulsion mode drops to ~0 Gs at the geometric center between the magnets (resulting from vector opposition).
* Figures show sliding force of two matching magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Hazards (electronics) - warnings
MW 40x15 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	19.0 cm
Hearing aid	10 Gs (1.0 mT)	15.0 cm
Timepiece	20 Gs (2.0 mT)	11.5 cm
Phone / Smartphone	40 Gs (4.0 mT)	9.0 cm
Car key	50 Gs (5.0 mT)	8.5 cm
Payment card	400 Gs (40.0 mT)	3.5 cm
HDD hard drive	600 Gs (60.0 mT)	3.0 cm

Powerful magnet radiation is a real danger to electronics and pacemakers. These magnets produce a field that destroys function of sensitive medical devices. Remember: the unseen radiation penetrates the body and glass. Exceptional care must be taken by people with hearing aids and insulin pumps. Influence will be felt by: automatic timepieces, car keys, membranes, and displays. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Collisions (cracking risk) - warning
MW 40x15 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	20.63 km/h (5.73 m/s)	2.32 J
30 mm	30.69 km/h (8.52 m/s)	5.14 J
50 mm	39.22 km/h (10.89 m/s)	8.39 J
100 mm	55.39 km/h (15.39 m/s)	16.73 J

Neodymium magnets are delicate – a violent impact against metal risks their cracking. Watch the impact speed – a neodymium left loose becomes dangerous. Striking energy can cause material chips or painful pinches to fingers. Hold the magnet firmly during bringing near metal so it doesn't hit violently against the metal. A collision at high speed means shattering of the magnet. Use safety goggles when handling with powerful specimens.

Table 9: Corrosion resistance
MW 40x15 / 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: Construction data (Flux)
MW 40x15 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	48 650 Mx	486.5 µWb
P_c Coefficient	0.48	Low (Flat)

Total magnetic flux passing through the magnet pole. Essential parameter for generator designers and motors. The P_c coefficient defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MW 40x15 / N38

Environment	Effective steel pull	Effect
Air (land)	42.64 kg	Standard
Water (riverbed)	48.82 kg (+6.18 kg buoyancy gain)	+14.5%

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

Water displaces steel, making heavy objects slightly lighter. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Shear force

*Note: On a vertical surface, the magnet holds only ~20% of its max power.

2. Efficiency vs thickness

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

3. Power loss vs temp

*For N38 grade, 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) = 0.48

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 specification and ecology

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: 010067-2026

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MW 30x5 / N38 - cylindrical magnet

8.35 ZŁ brutto / pcs

The presented product is an exceptionally strong rod magnet, composed of advanced NdFeB material, which, with dimensions of Ø40x15 mm, guarantees optimal power. This specific item boasts a tolerance of ±0.1mm and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 42.64 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring lightning-fast order fulfillment. Furthermore, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.

It successfully proves itself in DIY projects, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 418.33 N with a weight of only 141.37 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.

Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 40.1 mm) using two-component epoxy glues. To ensure stability in industry, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.

Magnets N38 are suitable for 90% of applications in modeling and machine building, where excessive miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø40x15), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.

The presented product is a neodymium magnet with precisely defined parameters: diameter 40 mm and height 15 mm. The key parameter here is the lifting capacity amounting to approximately 42.64 kg (force ~418.33 N), which, with such defined dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which secures it against external factors, 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 40 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 and cons of neodymium magnets.

Advantages

Besides their immense strength, neodymium magnets offer the following advantages:

They do not lose magnetism, even over nearly 10 years – the decrease in lifting capacity is only ~1% (based on measurements),
Magnets perfectly defend themselves against demagnetization caused by external fields,
The use of an elegant layer of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
They are known for high magnetic induction at the operating surface, which affects their effectiveness,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
Possibility of detailed shaping and optimizing to concrete conditions,
Wide application in future technologies – they are utilized in hard drives, electromotive mechanisms, advanced medical instruments, as well as complex engineering applications.
Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Cons

Disadvantages of neodymium magnets:

To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
Limited possibility of creating threads in the magnet and complex forms - preferred is cover - magnetic holder.
Possible danger related to microscopic parts of magnets pose a threat, if swallowed, which becomes key in the context of child safety. Furthermore, tiny parts of these products are able to be problematic in diagnostics medical in case of swallowing.
High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities

Holding force characteristics

Detachment force of the magnet in optimal conditions – what it depends on?

The force parameter is a result of laboratory testing executed under standard conditions:

on a block made of mild steel, optimally conducting the magnetic flux
whose thickness is min. 10 mm
with a plane perfectly flat
without the slightest clearance between the magnet and steel
during detachment in a direction vertical to the mounting surface
at conditions approx. 20°C

Practical aspects of lifting capacity – factors

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

Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
Angle of force application – maximum parameter is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is typically several times smaller (approx. 1/5 of the lifting capacity).
Steel thickness – too thin steel does not accept the full field, causing part of the power to be wasted into the air.
Steel grade – the best choice is pure iron steel. Cast iron may have worse magnetic properties.
Base smoothness – the more even the plate, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
Temperature influence – high temperature weakens pulling force. Too high temperature can permanently demagnetize the magnet.

Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under shearing force the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate reduces the lifting capacity.

Warnings

Maximum temperature

Do not overheat. NdFeB magnets are susceptible to heat. If you require resistance above 80°C, look for HT versions (H, SH, UH).

Bone fractures

Big blocks can crush fingers in a fraction of a second. Under no circumstances place your hand betwixt two strong magnets.

Keep away from electronics

An intense magnetic field interferes with the operation of compasses in smartphones and GPS navigation. Keep magnets close to a device to avoid damaging the sensors.

Eye protection

Despite the nickel coating, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.

Allergy Warning

Nickel alert: The nickel-copper-nickel coating consists of nickel. If redness happens, immediately stop working with magnets and wear gloves.

Choking Hazard

Always store magnets out of reach of children. Ingestion danger is significant, and the effects of magnets clamping inside the body are tragic.

Implant safety

Life threat: Neodymium magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.

Dust is flammable

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

Caution required

Handle with care. Rare earth magnets act from a distance and snap with huge force, often quicker than you can react.

Electronic devices

Very strong magnetic fields can erase data on credit cards, HDDs, and storage devices. Keep a distance of at least 10 cm.

Attention! More info about risks in the article: Magnet Safety Guide.

MW 40x15 / N38 - cylindrical magnet

Technical details - MW 40x15 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering analysis of the product - report

Table 1: Static pull force (force vs gap) - characteristics MW 40x15 / N38

Table 2: Shear hold (vertical surface) MW 40x15 / N38

Table 3: Wall mounting (shearing) - vertical pull MW 40x15 / N38

Table 4: Steel thickness (saturation) - sheet metal selection MW 40x15 / N38

Table 5: Working in heat (material behavior) - thermal limit MW 40x15 / N38

Table 6: Two magnets (repulsion) - field collision MW 40x15 / N38

Table 7: Hazards (electronics) - warnings MW 40x15 / N38

Table 8: Collisions (cracking risk) - warning MW 40x15 / N38

Table 9: Corrosion resistance MW 40x15 / N38

Table 10: Construction data (Flux) MW 40x15 / N38

Table 11: Underwater work (magnet fishing) MW 40x15 / N38

1. Shear force

2. Efficiency vs thickness

3. Power loss vs temp

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

Chemical composition

Environmental data

Force (pull)

Field Strength

Other proposals

UMC 60x9/5x15 / N38 - cylindrical magnetic holder

UMGZ 42x20x9 [M8] GZ / N38 - magnetic holder external thread

MPL 3x3x2 / N38 - lamellar magnet

MW 30x5 / N38 - cylindrical magnet

Pros and cons of neodymium magnets.

Advantages

Cons

Holding force characteristics

Detachment force of the magnet in optimal conditions – what it depends on?

Practical aspects of lifting capacity – factors

Warnings

Maximum temperature

Bone fractures

Keep away from electronics

Eye protection

Allergy Warning

Choking Hazard

Implant safety

Dust is flammable

Caution required

Electronic devices

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs gap) - characteristics
MW 40x15 / N38

Table 2: Shear hold (vertical surface)
MW 40x15 / N38

Table 3: Wall mounting (shearing) - vertical pull
MW 40x15 / N38

Table 4: Steel thickness (saturation) - sheet metal selection
MW 40x15 / N38

Table 5: Working in heat (material behavior) - thermal limit
MW 40x15 / N38

Table 6: Two magnets (repulsion) - field collision
MW 40x15 / N38

Table 7: Hazards (electronics) - warnings
MW 40x15 / N38

Table 8: Collisions (cracking risk) - warning
MW 40x15 / N38

Table 9: Corrosion resistance
MW 40x15 / N38

Table 10: Construction data (Flux)
MW 40x15 / N38

Table 11: Underwater work (magnet fishing)
MW 40x15 / N38