Product available Ships tomorrow

MP 5x2.7/1.2x5 S / N38 - ring 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

ring magnet

Catalog no 030202

GTIN/EAN: 5906301812197

5.00

Diameter

5 mm [±0,1 mm]

internal diameter Ø

2.7/1.2 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

0.69 g

Magnetization Direction

↑ axial

Load capacity

0.75 kg / 7.31 N

Magnetic Induction

553.14 mT / 5531 Gs

Coating

[NiCuNi] Nickel

check parameters »

0.836 ZŁ with VAT / pcs + price for transport

0.680 ZŁ net + 23% VAT / pcs

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Need advice?

Pick up the phone and ask +48 888 99 98 98 or get in touch via our online form the contact page.
Lifting power along with structure of a neodymium magnet can be estimated on our force calculator.

Orders placed before 14:00 will be shipped the same business day.

Physical properties - MP 5x2.7/1.2x5 S / N38 - ring magnet

Specification / characteristics - MP 5x2.7/1.2x5 S / N38 - ring magnet

properties

properties	values
Cat. no.	030202
GTIN/EAN	5906301812197
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	5 mm [±0,1 mm]
internal diameter Ø	2.7/1.2 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	0.69 g
Magnetization Direction	↑ axial
Load capacity ~ ?	0.75 kg / 7.31 N
Magnetic Induction ~ ?	553.14 mT / 5531 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 5x2.7/1.2x5 S / N38 - ring magnet

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

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

Physical simulation of the magnet - technical parameters

These data constitute the result of a physical analysis. Results rely on models for the class Nd₂Fe₁₄B. Operational performance might slightly differ from theoretical values. Use these data as a preliminary roadmap during assembly planning.

Table 1: Static pull force (pull vs gap) - characteristics
MP 5x2.7/1.2x5 S / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5322 Gs 532.2 mT	0.75 kg / 1.65 pounds 750.0 g / 7.4 N	safe
1 mm	3295 Gs 329.5 mT	0.29 kg / 0.63 pounds 287.5 g / 2.8 N	safe
2 mm	1883 Gs 188.3 mT	0.09 kg / 0.21 pounds 93.9 g / 0.9 N	safe
3 mm	1098 Gs 109.8 mT	0.03 kg / 0.07 pounds 31.9 g / 0.3 N	safe
5 mm	440 Gs 44.0 mT	0.01 kg / 0.01 pounds 5.1 g / 0.1 N	safe
10 mm	92 Gs 9.2 mT	0.00 kg / 0.00 pounds 0.2 g / 0.0 N	safe
15 mm	33 Gs 3.3 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	safe
20 mm	15 Gs 1.5 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	safe
30 mm	5 Gs 0.5 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	safe
50 mm	1 Gs 0.1 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	safe

Pulling power weakens sharply with every mm of gap. Keep in mind that every additional insulation layer (e.g., contamination, varnish, veneer) strongly reduces the pull force. Magnetic products work optimally in perfect adhesion; air break drastically cuts the power. See how quickly the load capacity fall, when the product does not adhere flatly to the steel surface. When calculating the assembly, discard unnecessary gaps.

Table 2: Sliding hold (vertical surface)
MP 5x2.7/1.2x5 S / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.15 kg / 0.33 pounds 150.0 g / 1.5 N
1 mm	Stal (~0.2)	0.06 kg / 0.13 pounds 58.0 g / 0.6 N
2 mm	Stal (~0.2)	0.02 kg / 0.04 pounds 18.0 g / 0.2 N
3 mm	Stal (~0.2)	0.01 kg / 0.01 pounds 6.0 g / 0.1 N
5 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 2.0 g / 0.0 N
10 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
15 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

The following data presents the estimated force required to initiate the slippage of the magnet vertically against a upright metal surface (considering typical friction). This parameter is relative to the separation distance between the magnet and the surface.

Table 3: Wall mounting (shearing) - vertical pull
MP 5x2.7/1.2x5 S / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.22 kg / 0.50 pounds 225.0 g / 2.2 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.15 kg / 0.33 pounds 150.0 g / 1.5 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.08 kg / 0.17 pounds 75.0 g / 0.7 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	0.38 kg / 0.83 pounds 375.0 g / 3.7 N

When hanging a holder on a vertical surface (e.g., a fridge), it will maintain barely approx. 20%-30% of nominal attraction strength. Gravitational force as well as a low friction coefficient influence the fact that magnets slip faster than they detach. Designing a wall mount? Consider that the sliding force is noticeably lower than the maximum static pull force. On a smooth steel, the element will slide down under a significantly smaller cargo. Using a rubber coating can significantly increase the grip.

Table 4: Steel thickness (substrate influence) - sheet metal selection
MP 5x2.7/1.2x5 S / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.08 kg / 0.17 pounds 75.0 g / 0.7 N
1 mm	25%	0.19 kg / 0.41 pounds 187.5 g / 1.8 N
2 mm	50%	0.38 kg / 0.83 pounds 375.0 g / 3.7 N
3 mm	75%	0.56 kg / 1.24 pounds 562.5 g / 5.5 N
5 mm	100%	0.75 kg / 1.65 pounds 750.0 g / 7.4 N
10 mm	100%	0.75 kg / 1.65 pounds 750.0 g / 7.4 N
11 mm	100%	0.75 kg / 1.65 pounds 750.0 g / 7.4 N
12 mm	100%	0.75 kg / 1.65 pounds 750.0 g / 7.4 N

A thin sheet is unable to take in the full magnetic flux, which squanders power of the holder. If you attach a powerful product to a thin surface, the field will pass right through and the holding will be smaller. To squeeze the maximum of this magnet's power, you need a suitably thick piece of metal. The saturation phenomenon means that on sheet metal structures (e.g., car bodies), the product shows lower pull force. We advise picking the steel cross-section based on the following data.

Table 5: Working in heat (stability) - thermal limit
MP 5x2.7/1.2x5 S / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	0.75 kg / 1.65 pounds 750.0 g / 7.4 N	OK
40 °C	-2.2%	0.73 kg / 1.62 pounds 733.5 g / 7.2 N	OK
60 °C	-4.4%	0.72 kg / 1.58 pounds 717.0 g / 7.0 N	OK
80 °C	-6.6%	0.70 kg / 1.54 pounds 700.5 g / 6.9 N
100 °C	-28.8%	0.53 kg / 1.18 pounds 534.0 g / 5.2 N

Standard neodymium magnets lose parameters after exceeding the maximum temperature. Avoid high temperatures – high temperature can permanently destroy this magnet. As the temperature rises, the magnet's power briefly decreases. Avoid using this product close to ovens higher than its safe range. Too high temperature will lead to permanent loss of magnetism.

*Engineering note: Heat tolerance depends not only on the material grade, as well as the dimension ratios. Thin magnets (low permeance coefficient) may lose charge permanently under lower heat stress than taller cylinders. The danger warning in the table points to a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - field range
MP 5x2.7/1.2x5 S / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	2.75 kg / 6.06 pounds 5 924 Gs	0.41 kg / 0.91 pounds 412 g / 4.0 N	N/A
1 mm	1.77 kg / 3.90 pounds 8 541 Gs	0.27 kg / 0.58 pounds 265 g / 2.6 N	1.59 kg / 3.51 pounds ~0 Gs
2 mm	1.05 kg / 2.32 pounds 6 590 Gs	0.16 kg / 0.35 pounds 158 g / 1.5 N	0.95 kg / 2.09 pounds ~0 Gs
3 mm	0.60 kg / 1.33 pounds 4 992 Gs	0.09 kg / 0.20 pounds 91 g / 0.9 N	0.54 kg / 1.20 pounds ~0 Gs
5 mm	0.20 kg / 0.44 pounds 2 860 Gs	0.03 kg / 0.07 pounds 30 g / 0.3 N	0.18 kg / 0.39 pounds ~0 Gs
10 mm	0.02 kg / 0.04 pounds 880 Gs	0.00 kg / 0.01 pounds 3 g / 0.0 N	0.02 kg / 0.04 pounds ~0 Gs
20 mm	0.00 kg / 0.00 pounds 184 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
50 mm	0.00 kg / 0.00 pounds 16 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
60 mm	0.00 kg / 0.00 pounds 10 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
70 mm	0.00 kg / 0.00 pounds 6 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
80 mm	0.00 kg / 0.00 pounds 4 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
90 mm	0.00 kg / 0.00 pounds 3 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
100 mm	0.00 kg / 0.00 pounds 2 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs

Two strong neodymiums interact from a significantly greater distance than a neodymium and metal setup. The setup of magnet-to-magnet creates a more powerful interaction and a larger range of operation. Planning to create a strong closure? Utilize two neodymiums instead of a neodymium and a striker plate. Exercise caution that when connecting a pair of magnets, the collision energy is huge. The repulsion force is a bit weaker than the attraction, but still significant.
*The magnetic induction in repulsion mode is approximately ~0 Gs in the exact middle of the gap (due to field cancellation).
Important: Figures apply to sliding force of dual same magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (electronics) - warnings
MP 5x2.7/1.2x5 S / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	3.0 cm
Hearing aid	10 Gs (1.0 mT)	2.5 cm
Mechanical watch	20 Gs (2.0 mT)	2.0 cm
Mobile device	40 Gs (4.0 mT)	1.5 cm
Car key	50 Gs (5.0 mT)	1.5 cm
Payment card	400 Gs (40.0 mT)	1.0 cm
HDD hard drive	600 Gs (60.0 mT)	0.5 cm

Powerful magnet radiation poses a serious hazard to electronics as well as pacemakers. These NdFeB products produce a field that destroys function of digital equipment. Remember: the invisible magnetic field passes through tissues and glass. Exceptional care must be taken by people with hearing aids and insulin pumps. Influence will be felt by: mechanical watches, remotes, speakers, and screens. Do not place the magnet near cards, hard drives, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - collision effects
MP 5x2.7/1.2x5 S / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	33.26 km/h (9.24 m/s)	0.03 J
30 mm	57.59 km/h (16.00 m/s)	0.09 J
50 mm	74.35 km/h (20.65 m/s)	0.15 J
100 mm	105.14 km/h (29.21 m/s)	0.29 J

NdFeB products are prone to chipping – a strong collision with metal causes immediate chipping. Watch the impact speed – a neodymium left loose turns into a projectile. Impact energy can trigger coating fragments or painful pinches to skin. Hold the magnet firmly during installation so it doesn't slam with momentum against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the magnet. Wear eye protection when handling with powerful specimens.

Table 9: Corrosion resistance
MP 5x2.7/1.2x5 S / 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. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (P_c)
MP 5x2.7/1.2x5 S / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	862 Mx	8.6 µWb
P_c Coefficient	0.83	High (Stable)

Total magnetic flux emitted by the pole surface. Essential parameter when building generators as well as sensors. The P_c coefficient determines the working geometry.

Table 11: Underwater work (magnet fishing)
MP 5x2.7/1.2x5 S / N38

Environment	Effective steel pull	Effect
Air (land)	0.75 kg	Standard
Water (riverbed)	0.86 kg (+0.11 kg buoyancy gain)	+14.5%

Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

Water displaces steel, making heavy objects slightly lighter. However, remember the water resistance when pulling the rope quickly.

1. Wall mount (shear)

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

2. Plate thickness effect

*Thin metal sheet (e.g. 0.5mm PC 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) = 0.83

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%

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: 030202-2026

Measurement Calculator

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Kilograms (kg)

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MP 20x8x5 / N38 - ring magnet

3.80 ZŁ brutto / pcs

The ring magnet with a hole MP 5x2.7/1.2x5 S / N38 is created for mechanical fastening, where glue might fail or be insufficient. Thanks to the hole (often for a screw), this model enables easy screwing to wood, wall, plastic, or metal. This product with a force of 0.75 kg works great as a door latch, speaker holder, or mounting element in devices.

This material behaves more like porcelain than steel, so it doesn't forgive mistakes during mounting. When tightening the screw, you must maintain caution. We recommend tightening manually with a screwdriver, not an impact driver, because excessive force will cause the ring to crack. It's a good idea to use a rubber spacer under the screw head, which will cushion the stresses. Remember: cracking during assembly results from material properties, not a product defect.

These magnets are coated with standard Ni-Cu-Ni plating, which protects them in indoor conditions, but does not ensure full waterproofing. In the place of the mounting hole, the coating is thinner and easily scratched when tightening the screw, which will become a corrosion focus. This product is dedicated for indoor use. For outdoor applications, we recommend choosing rubberized holders or additional protection with varnish.

A screw or bolt with a thread diameter smaller than 2.7/1.2 mm fits this model. If the magnet does not have a chamfer (cone), we recommend using a screw with a flat or cylindrical head, or possibly using a washer. Always check that the screw head is not larger than the outer diameter of the magnet (5 mm), so it doesn't protrude beyond the outline.

The presented product is a ring magnet with dimensions Ø5 mm (outer diameter) and height 5 mm. The pulling force of this model is an impressive 0.75 kg, which translates to 7.31 N in newtons. The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 2.7/1.2 mm.

The poles are located on the planes with holes, not on the sides of the ring. If you want two such magnets screwed with cones facing each other (faces) to attract, you must connect them with opposite poles (N to S). We do not offer paired sets with marked poles in this category, but they are easy to match manually.

Strengths and weaknesses of rare earth magnets.

Strengths

Besides their remarkable magnetic power, neodymium magnets offer the following advantages:

Their power is maintained, and after around 10 years it drops only by ~1% (according to research),
Magnets very well resist against demagnetization caused by ambient magnetic noise,
A magnet with a metallic silver surface has better aesthetics,
They feature high magnetic induction at the operating surface, which improves attraction properties,
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...
Thanks to freedom in constructing and the ability to customize to client solutions,
Wide application in future technologies – they are commonly used in mass storage devices, motor assemblies, diagnostic systems, as well as industrial machines.
Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Cons

Disadvantages of neodymium magnets:

They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also increases its resistance to damage
When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
Magnets exposed to a humid environment can rust. Therefore during using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
Limited ability of making nuts in the magnet and complex forms - recommended is casing - mounting mechanism.
Health risk related to microscopic parts of magnets can be dangerous, in case of ingestion, which gains importance in the aspect of protecting the youngest. It is also worth noting that small elements of these magnets can complicate diagnosis medical when they are in the body.
With budget limitations the cost of neodymium magnets can be a barrier,

Holding force characteristics

Maximum magnetic pulling force – what it depends on?

The lifting capacity listed is a measurement result executed under specific, ideal conditions:

on a plate made of structural steel, optimally conducting the magnetic field
whose thickness reaches at least 10 mm
characterized by lack of roughness
with direct contact (without paint)
during detachment in a direction perpendicular to the mounting surface
in stable room temperature

Lifting capacity in real conditions – factors

In real-world applications, the real power results from many variables, presented from the most important:

Air gap (betwixt the magnet and the metal), since even a very small distance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to paint, rust or debris).
Force direction – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
Chemical composition of the base – low-carbon steel attracts best. Alloy steels decrease magnetic permeability and holding force.
Surface finish – ideal contact is possible only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
Thermal environment – heating the magnet results in weakening of induction. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, in contrast under attempts to slide the magnet the load capacity is reduced by as much as 75%. In addition, even a minimal clearance between the magnet’s surface and the plate reduces the load capacity.

Warnings

Life threat

People with a ICD must keep an large gap from magnets. The magnetism can interfere with the operation of the life-saving device.

Adults only

Absolutely keep magnets away from children. Ingestion danger is high, and the effects of magnets clamping inside the body are life-threatening.

Maximum temperature

Do not overheat. NdFeB magnets are susceptible to temperature. If you need operation above 80°C, ask us about special high-temperature series (H, SH, UH).

Crushing force

Large magnets can smash fingers instantly. Do not place your hand between two attracting surfaces.

Phone sensors

GPS units and mobile phones are highly sensitive to magnetism. Direct contact with a powerful NdFeB magnet can ruin the internal compass in your phone.

Machining danger

Fire warning: Neodymium dust is explosive. Avoid machining magnets in home conditions as this may cause fire.

Respect the power

Before use, check safety instructions. Sudden snapping can destroy the magnet or injure your hand. Be predictive.

Electronic hazard

Powerful magnetic fields can destroy records on payment cards, hard drives, and storage devices. Stay away of at least 10 cm.

Magnets are brittle

Watch out for shards. Magnets can explode upon violent connection, launching shards into the air. Wear goggles.

Metal Allergy

It is widely known that the nickel plating (the usual finish) is a strong allergen. If you have an allergy, avoid direct skin contact or opt for coated magnets.

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

MP 5x2.7/1.2x5 S / N38 - ring magnet

Physical properties - MP 5x2.7/1.2x5 S / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical simulation of the magnet - technical parameters

Table 1: Static pull force (pull vs gap) - characteristics MP 5x2.7/1.2x5 S / N38

Table 2: Sliding hold (vertical surface) MP 5x2.7/1.2x5 S / N38

Table 3: Wall mounting (shearing) - vertical pull MP 5x2.7/1.2x5 S / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection MP 5x2.7/1.2x5 S / N38

Table 5: Working in heat (stability) - thermal limit MP 5x2.7/1.2x5 S / N38

Table 6: Magnet-Magnet interaction (repulsion) - field range MP 5x2.7/1.2x5 S / N38

Table 7: Safety (HSE) (electronics) - warnings MP 5x2.7/1.2x5 S / N38

Table 8: Dynamics (cracking risk) - collision effects MP 5x2.7/1.2x5 S / N38

Table 9: Corrosion resistance MP 5x2.7/1.2x5 S / N38

Table 10: Electrical data (Pc) MP 5x2.7/1.2x5 S / N38

Table 11: Underwater work (magnet fishing) MP 5x2.7/1.2x5 S / N38

1. Wall mount (shear)

2. Plate thickness effect

3. Heat tolerance

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

Chemical composition

Sustainability

Magnet pull force

Magnetic Induction

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MP 20x8x5 / N38 - ring magnet

Strengths and weaknesses of rare earth magnets.

Strengths

Cons

Holding force characteristics

Maximum magnetic pulling force – what it depends on?

Lifting capacity in real conditions – factors

Warnings

Life threat

Adults only

Maximum temperature

Crushing force

Phone sensors

Machining danger

Respect the power

Electronic hazard

Magnets are brittle

Metal Allergy

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs gap) - characteristics
MP 5x2.7/1.2x5 S / N38

Table 2: Sliding hold (vertical surface)
MP 5x2.7/1.2x5 S / N38

Table 3: Wall mounting (shearing) - vertical pull
MP 5x2.7/1.2x5 S / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection
MP 5x2.7/1.2x5 S / N38

Table 5: Working in heat (stability) - thermal limit
MP 5x2.7/1.2x5 S / N38

Table 6: Magnet-Magnet interaction (repulsion) - field range
MP 5x2.7/1.2x5 S / N38

Table 7: Safety (HSE) (electronics) - warnings
MP 5x2.7/1.2x5 S / N38

Table 8: Dynamics (cracking risk) - collision effects
MP 5x2.7/1.2x5 S / N38

Table 9: Corrosion resistance
MP 5x2.7/1.2x5 S / N38

Table 10: Electrical data (P_c)
MP 5x2.7/1.2x5 S / N38

Table 11: Underwater work (magnet fishing)
MP 5x2.7/1.2x5 S / N38