Product available Ships today (order by 14:00)

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

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

ring magnet

Catalog no 030201

GTIN/EAN: 5906301812180

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

technical parameters »

0.836 ZŁ with VAT / pcs + price for transport

0.680 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

0.680 ZŁ

0.836 ZŁ

price from 900 pcs

0.639 ZŁ

0.786 ZŁ

price from 3700 pcs

0.598 ZŁ

0.736 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Do you have questions?

Contact us by phone +48 888 99 98 98 otherwise send us a note through contact form the contact section.
Specifications as well as appearance of neodymium magnets can be tested with our our magnetic calculator.

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

Technical data - MP 5x2.7/1.2x5 C / N38 - ring magnet

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

properties

properties	values
Cat. no.	030201
GTIN/EAN	5906301812180
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 C / 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 modeling of the assembly - technical parameters

These information represent the result of a physical simulation. Values were calculated on models for the class Nd₂Fe₁₄B. Operational parameters might slightly differ. Treat these calculations as a reference point during assembly planning.

Table 1: Static pull force (pull vs gap) - power drop
MP 5x2.7/1.2x5 C / 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	low risk
1 mm	3295 Gs 329.5 mT	0.29 kg / 0.63 pounds 287.5 g / 2.8 N	low risk
2 mm	1883 Gs 188.3 mT	0.09 kg / 0.21 pounds 93.9 g / 0.9 N	low risk
3 mm	1098 Gs 109.8 mT	0.03 kg / 0.07 pounds 31.9 g / 0.3 N	low risk
5 mm	440 Gs 44.0 mT	0.01 kg / 0.01 pounds 5.1 g / 0.1 N	low risk
10 mm	92 Gs 9.2 mT	0.00 kg / 0.00 pounds 0.2 g / 0.0 N	low risk
15 mm	33 Gs 3.3 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	low risk
20 mm	15 Gs 1.5 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	low risk
30 mm	5 Gs 0.5 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	low risk
50 mm	1 Gs 0.1 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	low risk

Magnetic force drops significantly with every subsequent millimeter of gap. Note that every additional insulation layer (e.g., contamination, varnish, veneer) strongly reduces the pull force. Magnets operate optimally during direct contact; gap kills the power. Notice how flashily the pull force plummet, when the product does not touch directly to the steel surface. When calculating the assembly, eliminate additional spacers.

Table 2: Vertical capacity (wall)
MP 5x2.7/1.2x5 C / 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

This section shows the approximate force required to cause the downward movement of the magnet down along a vertical metal surface (considering standard friction). This parameter is relative to the air gap between the magnet and the surface.

Table 3: Vertical assembly (sliding) - vertical pull
MP 5x2.7/1.2x5 C / 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 magnet on a upright plane (e.g., a fridge), it you can count on only about 20%-30% of nominal attraction strength. Gravitational force as well as a low friction coefficient cause that magnets move down faster than they pull off. Want to create a vertical fastening? Note that the shear force is noticeably lower than the maximum static pull force. On a painted metal, the element will slip down under a much lighter cargo. Utilizing a rubberized layer can significantly improve the result.

Table 4: Material efficiency (substrate influence) - power losses
MP 5x2.7/1.2x5 C / 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 too thin steel is incapable of take in the entire magnetic field, which squanders power of the magnet. If you mount a strong magnet to a weak sheet, the flux will penetrate right through and the attraction force will be weaker. To achieve the maximum of this neodymium's power, you need a suitably thick backing of steel. The material oversaturation causes that on delicate walls (e.g., thin profiles), the holder works worse. We advise picking the steel dimension according to the table below.

Table 5: Thermal resistance (stability) - power drop
MP 5x2.7/1.2x5 C / 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

Classic neodymiums change their properties strength above the temperature limit. Avoid high temperatures – heat can irreversibly destroy this product. With increasing heat, the magnet's force temporarily decreases. Refrain from using this magnet near heat sources higher than its safe range. Exceeding the critical threshold will cause irreversible degradation of magnetism.

*Important note: Thermal stability is determined by both grade, as well as the dimension ratios. Thin magnets (pancake types) are more susceptible to demagnetization sooner than long magnets. Warning indicator in the table points to permanent field degradation for this specific geometry.

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

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding 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 magnetic products attract each other from a wider radius than a magnet and steel combination. The connection of magnet-to-magnet creates a more powerful interaction and a further horizon of operation. Planning to create a solid fastener? Utilize two neodymiums instead of a neodymium and a striker plate. Remember that when bringing together two magnets, the collision energy is massive. The repulsion force is marginally weaker than the connection force, but still large.
*Flux density for N-N configuration drops to ~0 Gs in the exact middle of the gap (due to field cancellation).
* Calculations apply to friction force of dual identical neodymium magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Safety (HSE) (electronics) - precautionary measures
MP 5x2.7/1.2x5 C / 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
Phone / Smartphone	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 large risk to electronics as well as medical implants. These magnets produce a field that disrupts operation of sensitive medical devices. Remember: the unseen radiation passes through tissues and plastic. Exceptional care must be taken by people with hearing aids and insulin pumps. The risk also applies to: mechanical watches, car keys, membranes, and screens. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

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

Magnetic elements are very brittle – a strong collision with metal risks their cracking. Watch the impact speed – a magnet released freely becomes dangerous. Striking energy can destroy the magnet or injury to fingers. Be sure to control the product during installation so it doesn't hit violently against the steel surface. A collision at high speed ends with a crack of the magnet. Wear eye protection when playing with powerful specimens.

Table 9: Coating parameters (durability)
MP 5x2.7/1.2x5 C / 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 following table defines the conditions under which this product can be safely used. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

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

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

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

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

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

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

In water, the magnet feels stronger thanks to Archimedes' principle. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Sliding resistance

*Caution: On a vertical surface, the magnet holds only approx. 20-30% of its perpendicular strength.

2. Steel saturation

*Thin metal sheet (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) = 0.83

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. The solid red line represents the demagnetization curve (material potential), while the dashed blue line is the load line based on the magnet's geometry. The P_c (Permeance Coefficient), also known as the load line slope, is a dimensionless value that describes the relationship between the magnet's shape and its magnetic stability. The intersection of these two lines (the black dot) is the operating point — it determines the actual magnetic flux density generated by the magnet in this specific configuration. A higher P_c value means the magnet is more 'slender' (tall relative to its area), resulting in a higher operating point and better resistance to irreversible demagnetization caused by external fields or temperature. A value of 0.42 is relatively low (typical for flat magnets), meaning the operating point is closer to the 'knee' of the curve — caution is advised when operating at temperatures near the maximum limit to avoid strength loss.

Technical and environmental data

Elemental analysis

iron (Fe)	64% – 68%
neodymium (Nd)	29% – 32%
boron (B)	1.1% – 1.2%
dysprosium (Dy)	0.5% – 2.0%
coating (Ni-Cu-Ni)	< 0.05%

Sustainability

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

Safety card (GPSR)

responsible entity

Dhit sp. z o.o.

ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki

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

batch number/type

id: 030201-2026

Quick Unit Converter

Force (pull)

Kilograms (kg)

Force in lbs

Field Strength

Gauss (Gs)

Input your value in a single field to generate results in the other units right away.

Other products

Product available Ships today (order by 14:00)

MP 30x7/3x3 / N38 - ring magnet

6.84 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

SM 32x450 [2xM8] / N42 - magnetic separator

1340.70 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

UMH 32x8x46 [M6] / N38 - magnetic holder with hook

22.14 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

UI 17.5x5 [C310] / N38 - badge holder

1.316 ZŁ brutto / pcs

The ring-shaped magnet MP 5x2.7/1.2x5 C / N38 is created for permanent mounting, 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 spacer element in devices.

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. If you must use it outside, paint it with anti-corrosion paint after mounting.

The inner hole diameter determines the maximum size of the mounting element. 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 (5 mm), so it doesn't protrude beyond the outline.

This model is characterized by dimensions Ø5x5 mm and a weight of 0.69 g. 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. In the case of connecting two rings, make sure one is turned the right way. We do not offer paired sets with marked poles in this category, but they are easy to match manually.

Strengths and weaknesses of Nd₂Fe₁₄B magnets.

Advantages

Besides their exceptional field intensity, neodymium magnets offer the following advantages:

They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
They feature excellent resistance to weakening of magnetic properties when exposed to opposing magnetic fields,
The use of an shiny finish of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
Possibility of individual shaping as well as optimizing to complex needs,
Huge importance in electronics industry – they find application in hard drives, brushless drives, advanced medical instruments, and other advanced devices.
Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Weaknesses

Disadvantages of neodymium magnets:

They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only protects the magnet but also improves its resistance to damage
Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
Limited possibility of making threads in the magnet and complex shapes - recommended is cover - mounting mechanism.
Health risk to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, small elements of these magnets are able to complicate diagnosis medical when they are in the body.
Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Lifting parameters

Magnetic strength at its maximum – what contributes to it?

The lifting capacity listed is a theoretical maximum value performed under the following configuration:

with the contact of a sheet made of low-carbon steel, guaranteeing maximum field concentration
whose transverse dimension is min. 10 mm
with an ideally smooth touching surface
without any clearance between the magnet and steel
under vertical application of breakaway force (90-degree angle)
at standard ambient temperature

Practical aspects of lifting capacity – factors

Effective lifting capacity impacted by specific conditions, such as (from most important):

Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by veneer or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the nominal value.
Plate thickness – insufficiently thick steel causes magnetic saturation, causing part of the flux to be wasted to the other side.
Steel grade – ideal substrate is pure iron steel. Stainless steels may have worse magnetic properties.
Plate texture – ground elements guarantee perfect abutment, which improves field saturation. Rough surfaces weaken the grip.
Temperature influence – hot environment reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate lowers the holding force.

Warnings

Safe distance

Equipment safety: Neodymium magnets can ruin payment cards and delicate electronics (heart implants, hearing aids, timepieces).

Product not for children

NdFeB magnets 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 necessitates immediate surgery.

Threat to navigation

A powerful magnetic field disrupts the operation of magnetometers in smartphones and GPS navigation. Do not bring magnets near a smartphone to avoid damaging the sensors.

Immense force

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

Crushing risk

Protect your hands. Two powerful magnets will snap together instantly with a force of massive weight, destroying everything in their path. Be careful!

Magnet fragility

Neodymium magnets are sintered ceramics, meaning they are prone to chipping. Impact of two magnets leads to them shattering into shards.

Heat warning

Keep cool. NdFeB magnets are sensitive to temperature. If you require operation above 80°C, look for HT versions (H, SH, UH).

Nickel coating and allergies

Some people experience a hypersensitivity to nickel, which is the typical protective layer for neodymium magnets. Prolonged contact can result in skin redness. We strongly advise use protective gloves.

Fire risk

Dust generated during machining of magnets is self-igniting. Do not drill into magnets unless you are an expert.

Pacemakers

People with a heart stimulator must keep an safe separation from magnets. The magnetism can stop the operation of the life-saving device.

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

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

Technical data - MP 5x2.7/1.2x5 C / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering modeling of the assembly - technical parameters

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

Table 2: Vertical capacity (wall) MP 5x2.7/1.2x5 C / N38

Table 3: Vertical assembly (sliding) - vertical pull MP 5x2.7/1.2x5 C / N38

Table 4: Material efficiency (substrate influence) - power losses MP 5x2.7/1.2x5 C / N38

Table 5: Thermal resistance (stability) - power drop MP 5x2.7/1.2x5 C / N38

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

Table 7: Safety (HSE) (electronics) - precautionary measures MP 5x2.7/1.2x5 C / N38

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

Table 9: Coating parameters (durability) MP 5x2.7/1.2x5 C / N38

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

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

1. Sliding resistance

2. Steel saturation

3. Power loss vs temp

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

Elemental analysis

Sustainability

Force (pull)

Field Strength

Other products

MP 30x7/3x3 / N38 - ring magnet

SM 32x450 [2xM8] / N42 - magnetic separator

UMH 32x8x46 [M6] / N38 - magnetic holder with hook

UI 17.5x5 [C310] / N38 - badge holder

Strengths and weaknesses of Nd2Fe14B magnets.

Advantages

Weaknesses

Lifting parameters

Magnetic strength at its maximum – what contributes to it?

Practical aspects of lifting capacity – factors

Warnings

Safe distance

Product not for children

Threat to navigation

Immense force

Crushing risk

Magnet fragility

Heat warning

Nickel coating and allergies

Fire risk

Pacemakers

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

Table 2: Vertical capacity (wall)
MP 5x2.7/1.2x5 C / N38

Table 3: Vertical assembly (sliding) - vertical pull
MP 5x2.7/1.2x5 C / N38

Table 4: Material efficiency (substrate influence) - power losses
MP 5x2.7/1.2x5 C / N38

Table 5: Thermal resistance (stability) - power drop
MP 5x2.7/1.2x5 C / N38

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

Table 7: Safety (HSE) (electronics) - precautionary measures
MP 5x2.7/1.2x5 C / N38

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

Table 9: Coating parameters (durability)
MP 5x2.7/1.2x5 C / N38

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

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

Strengths and weaknesses of Nd₂Fe₁₄B magnets.