Product available Ships today (order by 14:00)

MP 20x5x5 / 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 030186

GTIN/EAN: 5906301812036

5.00

Diameter

20 mm [±0,1 mm]

internal diameter Ø

5 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

11.04 g

Magnetization Direction

↑ axial

Load capacity

6.49 kg / 63.68 N

Magnetic Induction

277.16 mT / 2772 Gs

Coating

[NiCuNi] Nickel

see technical data »

2.76 ZŁ with VAT / pcs + price for transport

2.24 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

2.24 ZŁ

2.76 ZŁ

price from 300 pcs

2.11 ZŁ

2.59 ZŁ

price from 1150 pcs

1.971 ZŁ

2.42 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Want to talk magnets?

Contact us by phone +48 22 499 98 98 alternatively let us know by means of our online form through our site.
Force along with appearance of magnetic components can be analyzed with our magnetic mass calculator.

Same-day shipping for orders placed before 14:00.

Technical details - MP 20x5x5 / N38 - ring magnet

Specification / characteristics - MP 20x5x5 / N38 - ring magnet

properties

properties	values
Cat. no.	030186
GTIN/EAN	5906301812036
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	20 mm [±0,1 mm]
internal diameter Ø	5 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	11.04 g
Magnetization Direction	↑ axial
Load capacity ~ ?	6.49 kg / 63.68 N
Magnetic Induction ~ ?	277.16 mT / 2772 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 20x5x5 / 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

Engineering simulation of the product - technical parameters

Presented data are the result of a physical calculation. Results were calculated on algorithms for the material Nd₂Fe₁₄B. Real-world conditions may differ from theoretical values. Treat these data as a reference point during assembly planning.

Table 1: Static force (force vs distance) - characteristics
MP 20x5x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5917 Gs 591.7 mT	6.49 kg / 14.31 pounds 6490.0 g / 63.7 N	strong
1 mm	5321 Gs 532.1 mT	5.25 kg / 11.57 pounds 5249.3 g / 51.5 N	strong
2 mm	4736 Gs 473.6 mT	4.16 kg / 9.17 pounds 4158.8 g / 40.8 N	strong
3 mm	4184 Gs 418.4 mT	3.25 kg / 7.15 pounds 3245.0 g / 31.8 N	strong
5 mm	3216 Gs 321.6 mT	1.92 kg / 4.23 pounds 1917.2 g / 18.8 N	low risk
10 mm	1650 Gs 165.0 mT	0.50 kg / 1.11 pounds 504.5 g / 4.9 N	low risk
15 mm	907 Gs 90.7 mT	0.15 kg / 0.34 pounds 152.6 g / 1.5 N	low risk
20 mm	544 Gs 54.4 mT	0.05 kg / 0.12 pounds 54.9 g / 0.5 N	low risk
30 mm	240 Gs 24.0 mT	0.01 kg / 0.02 pounds 10.7 g / 0.1 N	low risk
50 mm	75 Gs 7.5 mT	0.00 kg / 0.00 pounds 1.0 g / 0.0 N	low risk

Pulling power decreases drastically with every subsequent millimeter of distance. Remember that even a microscopic distance (e.g., dirt, paint, veneer) significantly reduces the pull force. Magnetic products hold most effectively at the point of direct contact; gap nullifies the power. Notice how rapidly the parameters fall, when the product does not touch directly to the steel surface. When planning the assembly, avoid additional spacers.

Table 2: Slippage capacity (vertical surface)
MP 20x5x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.30 kg / 2.86 pounds 1298.0 g / 12.7 N
1 mm	Stal (~0.2)	1.05 kg / 2.31 pounds 1050.0 g / 10.3 N
2 mm	Stal (~0.2)	0.83 kg / 1.83 pounds 832.0 g / 8.2 N
3 mm	Stal (~0.2)	0.65 kg / 1.43 pounds 650.0 g / 6.4 N
5 mm	Stal (~0.2)	0.38 kg / 0.85 pounds 384.0 g / 3.8 N
10 mm	Stal (~0.2)	0.10 kg / 0.22 pounds 100.0 g / 1.0 N
15 mm	Stal (~0.2)	0.03 kg / 0.07 pounds 30.0 g / 0.3 N
20 mm	Stal (~0.2)	0.01 kg / 0.02 pounds 10.0 g / 0.1 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 2.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

The table below defines the estimated shear load sufficient to start the sliding of the magnet down against a upright steel wall (considering typical friction coefficient). The holding force is a function of the distance between the magnet and the metal.

Table 3: Vertical assembly (shearing) - vertical pull
MP 20x5x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.95 kg / 4.29 pounds 1947.0 g / 19.1 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.30 kg / 2.86 pounds 1298.0 g / 12.7 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.65 kg / 1.43 pounds 649.0 g / 6.4 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.25 kg / 7.15 pounds 3245.0 g / 31.8 N

When hanging a holder on a upright plane (e.g., a board), it will only hold just approx. 1/5 of its nominal power. Gravity and a low friction coefficient cause that products slide down faster than they detach. Want to create a vertical fastening? Remember that the sliding force is much weaker than the perpendicular breakaway force. On a slippery surface, the magnet will give way down under a noticeably lighter cargo. Utilizing a rubberized coating can drastically improve the result.

Table 4: Material efficiency (saturation) - sheet metal selection
MP 20x5x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.65 kg / 1.43 pounds 649.0 g / 6.4 N
1 mm	25%	1.62 kg / 3.58 pounds 1622.5 g / 15.9 N
2 mm	50%	3.25 kg / 7.15 pounds 3245.0 g / 31.8 N
3 mm	75%	4.87 kg / 10.73 pounds 4867.5 g / 47.8 N
5 mm	100%	6.49 kg / 14.31 pounds 6490.0 g / 63.7 N
10 mm	100%	6.49 kg / 14.31 pounds 6490.0 g / 63.7 N
11 mm	100%	6.49 kg / 14.31 pounds 6490.0 g / 63.7 N
12 mm	100%	6.49 kg / 14.31 pounds 6490.0 g / 63.7 N

A thin metal plate is incapable of absorb the entire magnetic field, which squanders power of the magnet. Should you mount a strong magnet to a weak sheet, the flux will pass right through and the pull force will drop sharply. To utilize full efficiency of this magnet's potential, you require a sufficiently solid element of steel. The saturation effect means that on sheet metal structures (e.g., appliance housings), the product holds weaker. We suggest choosing the steel dimension according to the table below.

Table 5: Thermal resistance (material behavior) - power drop
MP 20x5x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	6.49 kg / 14.31 pounds 6490.0 g / 63.7 N	OK
40 °C	-2.2%	6.35 kg / 13.99 pounds 6347.2 g / 62.3 N	OK
60 °C	-4.4%	6.20 kg / 13.68 pounds 6204.4 g / 60.9 N	OK
80 °C	-6.6%	6.06 kg / 13.36 pounds 6061.7 g / 59.5 N
100 °C	-28.8%	4.62 kg / 10.19 pounds 4620.9 g / 45.3 N

Standard neodymium magnets change their properties strength above the temperature limit. Watch out for overheating – heat can irreversibly destroy this magnet. As the temperature rises, the neodymium's force temporarily lowers. Do not use this product close to ovens exceeding its safe range. Exceeding the critical threshold will lead to irreversible degradation of magnetism.

*Engineering note: Temperature resistance depends not only on the material grade, and the Permeance Coefficient Pc. Flat magnets (low permeance coefficient) may lose charge permanently sooner compared to rod magnets. Red status in the table points to permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - field range
MP 20x5x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Strength (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	54.03 kg / 119.11 pounds 6 121 Gs	8.10 kg / 17.87 pounds 8104 g / 79.5 N	N/A
1 mm	48.76 kg / 107.50 pounds 11 242 Gs	7.31 kg / 16.13 pounds 7314 g / 71.8 N	43.89 kg / 96.75 pounds ~0 Gs
2 mm	43.70 kg / 96.34 pounds 10 642 Gs	6.55 kg / 14.45 pounds 6555 g / 64.3 N	39.33 kg / 86.71 pounds ~0 Gs
3 mm	38.98 kg / 85.94 pounds 10 051 Gs	5.85 kg / 12.89 pounds 5847 g / 57.4 N	35.08 kg / 77.34 pounds ~0 Gs
5 mm	30.63 kg / 67.54 pounds 8 910 Gs	4.60 kg / 10.13 pounds 4595 g / 45.1 N	27.57 kg / 60.78 pounds ~0 Gs
10 mm	15.96 kg / 35.19 pounds 6 432 Gs	2.39 kg / 5.28 pounds 2394 g / 23.5 N	14.36 kg / 31.67 pounds ~0 Gs
20 mm	4.20 kg / 9.26 pounds 3 299 Gs	0.63 kg / 1.39 pounds 630 g / 6.2 N	3.78 kg / 8.33 pounds ~0 Gs
50 mm	0.19 kg / 0.42 pounds 702 Gs	0.03 kg / 0.06 pounds 29 g / 0.3 N	0.17 kg / 0.38 pounds ~0 Gs
60 mm	0.09 kg / 0.20 pounds 480 Gs	0.01 kg / 0.03 pounds 13 g / 0.1 N	0.08 kg / 0.18 pounds ~0 Gs
70 mm	0.05 kg / 0.10 pounds 342 Gs	0.01 kg / 0.01 pounds 7 g / 0.1 N	0.04 kg / 0.09 pounds ~0 Gs
80 mm	0.02 kg / 0.05 pounds 253 Gs	0.00 kg / 0.01 pounds 4 g / 0.0 N	0.02 kg / 0.05 pounds ~0 Gs
90 mm	0.01 kg / 0.03 pounds 193 Gs	0.00 kg / 0.00 pounds 2 g / 0.0 N	0.01 kg / 0.03 pounds ~0 Gs
100 mm	0.01 kg / 0.02 pounds 150 Gs	0.00 kg / 0.00 pounds 1 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs

Two magnetic products attract each other from a wider radius than a neodymium and metal combination. The connection of magnet-to-magnet generates a stronger field and a larger range of operation. Planning to create a strong closure? Apply two magnets instead of one magnet and a striker plate. Remember that when bringing together two magnets, the impact force is extreme. The levitation is slightly lower than the attraction, but still impressive.
*Field value between like poles drops to ~0 Gs in the exact middle of the gap (due to field cancellation).
Note: Calculations refer to sliding force of two same magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Hazards (electronics) - warnings
MP 20x5x5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	14.5 cm
Hearing aid	10 Gs (1.0 mT)	11.5 cm
Timepiece	20 Gs (2.0 mT)	9.0 cm
Mobile device	40 Gs (4.0 mT)	6.5 cm
Remote	50 Gs (5.0 mT)	6.0 cm
Payment card	400 Gs (40.0 mT)	2.5 cm
HDD hard drive	600 Gs (60.0 mT)	2.0 cm

Powerful magnet radiation is a real danger to electronic devices as well as medical implants. These NdFeB products produce a field that destroys function of digital equipment. Notice: the unseen radiation acts through matter and plastic. Exceptional care must be exercised by people with hearing aids and drug dispensers. Also at risk are: automatic timepieces, car keys, speakers, and screens. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Impact energy (cracking risk) - collision effects
MP 20x5x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	25.61 km/h (7.11 m/s)	0.28 J
30 mm	42.40 km/h (11.78 m/s)	0.77 J
50 mm	54.68 km/h (15.19 m/s)	1.27 J
100 mm	77.33 km/h (21.48 m/s)	2.55 J

NdFeB products are prone to chipping – a collision with steel causes immediate chipping. Pay attention to connection velocity – a magnet released freely speeds with massive force. Kinetic force can cause material chips or painful pinches to fingers. Hold the magnet firmly during installation so it doesn't hit violently against the steel surface. A collision at high speed means shattering of the neodymium. Use safety goggles when working with large magnets.

Table 9: Coating parameters (durability)
MP 20x5x5 / 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)

Neodymium magnets are highly susceptible to corrosion without proper protection. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Electrical data (P_c)
MP 20x5x5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	16 116 Mx	161.2 µWb
P_c Coefficient	1.13	High (Stable)

Flux value passing through the pole surface. Key data in coil applications as well as sensors. The P_c coefficient defines the working geometry.

Table 11: Underwater work (magnet fishing)
MP 20x5x5 / N38

Environment	Effective steel pull	Effect
Air (land)	6.49 kg	Standard
Water (riverbed)	7.43 kg (+0.94 kg buoyancy gain)	+14.5%

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

The magnetic field penetrates through water without any losses. Buoyancy helps in lifting finds.

1. Shear force

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

2. Plate thickness effect

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

3. Thermal stability

*For N38 material, the safety limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 1.13

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

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%

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: 030186-2026

Magnet Unit Converter

Force (pull)

Force in kg

Force (N)

Force in lbs

Magnetic Field

Induction (Gs)

Insert a value in one of the inputs, to see all other values change on the fly.

Other offers

Product available Ships today (order by 14:00)

MW 40x15 / N38 - cylindrical magnet

65.93 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

MW 15x5 / N38 - cylindrical magnet

3.20 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

MW 15x3 / N38 - cylindrical magnet

1.624 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

UI 45x13x6 [Z323] / N38 - badge holder

2.40 ZŁ brutto / pcs

It is ideally suited for places where solid attachment of the magnet to the substrate is required without the risk of detachment. Mounting is clean and reversible, unlike gluing. It is also often used in advertising for fixing signs and in workshops for organizing tools.

This material behaves more like porcelain than steel, so it doesn't forgive mistakes during mounting. One turn too many can destroy the magnet, so do it slowly. 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.

Moisture can penetrate micro-cracks in the coating and cause oxidation of the magnet. Damage to the protective layer during assembly is the most common cause of rusting. This product is dedicated for inside building use. For outdoor applications, we recommend choosing magnets in hermetic housing or additional protection with varnish.

A screw or bolt with a thread diameter smaller than 5 mm fits this model. For magnets with a straight hole, a conical head can act like a wedge and burst the magnet. Always check that the screw head is not larger than the outer diameter of the magnet (20 mm), so it doesn't protrude beyond the outline.

This model is characterized by dimensions Ø20x5 mm and a weight of 11.04 g. The key parameter here is the lifting capacity amounting to approximately 6.49 kg (force ~63.68 N). The mounting hole diameter is precisely 5 mm.

These magnets are magnetized axially (through the thickness), which means one flat side is the N pole and the other is S. 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.

Advantages and disadvantages of rare earth magnets.

Advantages

Apart from their notable power, neodymium magnets have these key benefits:

They do not lose power, even during nearly ten years – the drop in strength is only ~1% (according to tests),
They are extremely resistant to demagnetization induced by presence of other magnetic fields,
In other words, due to the smooth surface of silver, the element gains visual value,
Magnets possess excellent magnetic induction on the surface,
Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling action at temperatures reaching 230°C and above...
Thanks to flexibility in designing and the capacity to customize to complex applications,
Fundamental importance in advanced technology sectors – they are commonly used in hard drives, electromotive mechanisms, advanced medical instruments, and technologically advanced constructions.
Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Cons

What to avoid - cons of neodymium magnets: application proposals

They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
Due to limitations in creating threads and complicated shapes in magnets, we recommend using casing - magnetic mount.
Possible danger to health – tiny shards of magnets pose a threat, in case of ingestion, which gains importance in the context of child safety. Additionally, small components of these magnets are able to be problematic in diagnostics medical when they are in the body.
Due to expensive raw materials, their price is relatively high,

Lifting parameters

Maximum lifting capacity of the magnet – what it depends on?

The specified lifting capacity concerns the maximum value, measured under ideal test conditions, specifically:

with the application of a yoke made of special test steel, guaranteeing maximum field concentration
whose transverse dimension equals approx. 10 mm
with an polished contact surface
without the slightest air gap between the magnet and steel
during pulling in a direction perpendicular to the mounting surface
in stable room temperature

What influences lifting capacity in practice

Real force is influenced by working environment parameters, mainly (from most important):

Distance – the presence of any layer (rust, dirt, gap) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
Force direction – catalog parameter refers to pulling vertically. When applying parallel force, the magnet holds much less (typically approx. 20-30% of nominal force).
Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
Material composition – not every steel attracts identically. High carbon content worsen the interaction with the magnet.
Surface structure – the more even the plate, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
Operating temperature – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).

Holding force was tested on the plate surface of 20 mm thickness, when a perpendicular force was applied, whereas under shearing force the holding force is lower. In addition, even a minimal clearance between the magnet and the plate decreases the holding force.

Safety rules for work with neodymium magnets

Magnet fragility

Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Fire risk

Dust generated during cutting of magnets is combustible. Do not drill into magnets unless you are an expert.

Do not underestimate power

Handle with care. Neodymium magnets act from a distance and connect with huge force, often quicker than you can react.

Power loss in heat

Keep cool. Neodymium magnets are susceptible to temperature. If you require resistance above 80°C, inquire about HT versions (H, SH, UH).

Allergic reactions

Some people have a contact allergy to nickel, which is the typical protective layer for neodymium magnets. Extended handling might lead to dermatitis. We suggest wear protective gloves.

GPS and phone interference

A strong magnetic field negatively affects the functioning of compasses in phones and GPS navigation. Keep magnets near a device to avoid damaging the sensors.

Bone fractures

Mind your fingers. Two powerful magnets will join immediately with a force of massive weight, destroying everything in their path. Be careful!

Product not for children

These products are not suitable for play. Accidental ingestion of a few magnets may result in them connecting inside the digestive tract, which poses a severe health hazard and requires urgent medical intervention.

Health Danger

For implant holders: Powerful magnets affect electronics. Keep minimum 30 cm distance or request help to work with the magnets.

Magnetic media

Avoid bringing magnets near a wallet, laptop, or TV. The magnetism can permanently damage these devices and wipe information from cards.

Attention! Need more info? Check our post: Are neodymium magnets dangerous?

MP 20x5x5 / N38 - ring magnet

Technical details - MP 20x5x5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering simulation of the product - technical parameters

Table 1: Static force (force vs distance) - characteristics MP 20x5x5 / N38

Table 2: Slippage capacity (vertical surface) MP 20x5x5 / N38

Table 3: Vertical assembly (shearing) - vertical pull MP 20x5x5 / N38

Table 4: Material efficiency (saturation) - sheet metal selection MP 20x5x5 / N38

Table 5: Thermal resistance (material behavior) - power drop MP 20x5x5 / N38

Table 6: Magnet-Magnet interaction (attraction) - field range MP 20x5x5 / N38

Table 7: Hazards (electronics) - warnings MP 20x5x5 / N38

Table 8: Impact energy (cracking risk) - collision effects MP 20x5x5 / N38

Table 9: Coating parameters (durability) MP 20x5x5 / N38

Table 10: Electrical data (Pc) MP 20x5x5 / N38

Table 11: Underwater work (magnet fishing) MP 20x5x5 / N38

1. Shear force

2. Plate thickness effect

3. Thermal stability

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

Elemental analysis

Environmental data

Force (pull)

Magnetic Field

Other offers

MW 40x15 / N38 - cylindrical magnet

MW 15x5 / N38 - cylindrical magnet

MW 15x3 / N38 - cylindrical magnet

UI 45x13x6 [Z323] / N38 - badge holder

Advantages and disadvantages of rare earth magnets.

Advantages

Cons

Lifting parameters

Maximum lifting capacity of the magnet – what it depends on?

What influences lifting capacity in practice

Safety rules for work with neodymium magnets

Magnet fragility

Fire risk

Do not underestimate power

Power loss in heat

Allergic reactions

GPS and phone interference

Bone fractures

Product not for children

Health Danger

Magnetic media

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs distance) - characteristics
MP 20x5x5 / N38

Table 2: Slippage capacity (vertical surface)
MP 20x5x5 / N38

Table 3: Vertical assembly (shearing) - vertical pull
MP 20x5x5 / N38

Table 4: Material efficiency (saturation) - sheet metal selection
MP 20x5x5 / N38

Table 5: Thermal resistance (material behavior) - power drop
MP 20x5x5 / N38

Table 6: Magnet-Magnet interaction (attraction) - field range
MP 20x5x5 / N38

Table 7: Hazards (electronics) - warnings
MP 20x5x5 / N38

Table 8: Impact energy (cracking risk) - collision effects
MP 20x5x5 / N38

Table 9: Coating parameters (durability)
MP 20x5x5 / N38

Table 10: Electrical data (P_c)
MP 20x5x5 / N38

Table 11: Underwater work (magnet fishing)
MP 20x5x5 / N38