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MP 15x7/3.5x5 / 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 030390

GTIN/EAN: 5906301812302

5.00

Diameter

15 mm [±0,1 mm]

internal diameter Ø

7/3.5 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

6.27 g

Magnetization Direction

↑ axial

Load capacity

5.09 kg / 49.95 N

Magnetic Induction

343.70 mT / 3437 Gs

Coating

[NiCuNi] Nickel

technical specifications »

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Physical properties - MP 15x7/3.5x5 / N38 - ring magnet

Specification / characteristics - MP 15x7/3.5x5 / N38 - ring magnet

properties

properties	values
Cat. no.	030390
GTIN/EAN	5906301812302
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	15 mm [±0,1 mm]
internal diameter Ø	7/3.5 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	6.27 g
Magnetization Direction	↑ axial
Load capacity ~ ?	5.09 kg / 49.95 N
Magnetic Induction ~ ?	343.70 mT / 3437 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 15x7/3.5x5 / 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

Technical modeling of the magnet - data

These information constitute the outcome of a engineering calculation. Results are based on algorithms for the class Nd₂Fe₁₄B. Actual parameters may differ. Please consider these data as a preliminary roadmap when designing systems.

Table 1: Static force (pull vs distance) - characteristics
MP 15x7/3.5x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	3054 Gs 305.4 mT	5.09 kg / 11.22 LBS 5090.0 g / 49.9 N	medium risk
1 mm	2736 Gs 273.6 mT	4.09 kg / 9.01 LBS 4085.7 g / 40.1 N	medium risk
2 mm	2372 Gs 237.2 mT	3.07 kg / 6.77 LBS 3069.9 g / 30.1 N	medium risk
3 mm	2007 Gs 200.7 mT	2.20 kg / 4.84 LBS 2197.4 g / 21.6 N	medium risk
5 mm	1377 Gs 137.7 mT	1.03 kg / 2.28 LBS 1034.5 g / 10.1 N	weak grip
10 mm	526 Gs 52.6 mT	0.15 kg / 0.33 LBS 151.3 g / 1.5 N	weak grip
15 mm	232 Gs 23.2 mT	0.03 kg / 0.06 LBS 29.3 g / 0.3 N	weak grip
20 mm	118 Gs 11.8 mT	0.01 kg / 0.02 LBS 7.6 g / 0.1 N	weak grip
30 mm	42 Gs 4.2 mT	0.00 kg / 0.00 LBS 0.9 g / 0.0 N	weak grip
50 mm	10 Gs 1.0 mT	0.00 kg / 0.00 LBS 0.1 g / 0.0 N	weak grip

Magnetic force weakens drastically with every subsequent millimeter of spacing. Keep in mind that even a microscopic distance (e.g., dirt, paint, dust) strongly diminishes the holding power. Magnetic products hold most effectively during direct contact; gap weakens the power. Observe how quickly the pull force fall, when the product does not adhere flatly to the steel surface. When planning the arrangement, avoid unnecessary gaps.

Table 2: Vertical capacity (wall)
MP 15x7/3.5x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.02 kg / 2.24 LBS 1018.0 g / 10.0 N
1 mm	Stal (~0.2)	0.82 kg / 1.80 LBS 818.0 g / 8.0 N
2 mm	Stal (~0.2)	0.61 kg / 1.35 LBS 614.0 g / 6.0 N
3 mm	Stal (~0.2)	0.44 kg / 0.97 LBS 440.0 g / 4.3 N
5 mm	Stal (~0.2)	0.21 kg / 0.45 LBS 206.0 g / 2.0 N
10 mm	Stal (~0.2)	0.03 kg / 0.07 LBS 30.0 g / 0.3 N
15 mm	Stal (~0.2)	0.01 kg / 0.01 LBS 6.0 g / 0.1 N
20 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 2.0 g / 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N

The table below shows the approximate holding capacity needed to cause the sliding of the magnet downwards along a upright steel wall (assuming typical friction). This value depends on the air gap between the magnet and the surface.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MP 15x7/3.5x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.53 kg / 3.37 LBS 1527.0 g / 15.0 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.02 kg / 2.24 LBS 1018.0 g / 10.0 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.51 kg / 1.12 LBS 509.0 g / 5.0 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	2.55 kg / 5.61 LBS 2545.0 g / 25.0 N

When placing a element on a vertical plane (e.g., a board), it you can count on just approx. 1/5 of its maximum pull force. Gravitational force and a weak degree of grip cause that products slip easier than they pull off. Planning a vertical fastening? Consider that the shear force is noticeably lower than the maximum static pull force. On a painted metal, the holder will slide down under a significantly smaller cargo. Application of an anti-slip layer can effectively increase the grip.

Table 4: Steel thickness (substrate influence) - sheet metal selection
MP 15x7/3.5x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.51 kg / 1.12 LBS 509.0 g / 5.0 N
1 mm	25%	1.27 kg / 2.81 LBS 1272.5 g / 12.5 N
2 mm	50%	2.55 kg / 5.61 LBS 2545.0 g / 25.0 N
3 mm	75%	3.82 kg / 8.42 LBS 3817.5 g / 37.4 N
5 mm	100%	5.09 kg / 11.22 LBS 5090.0 g / 49.9 N
10 mm	100%	5.09 kg / 11.22 LBS 5090.0 g / 49.9 N
11 mm	100%	5.09 kg / 11.22 LBS 5090.0 g / 49.9 N
12 mm	100%	5.09 kg / 11.22 LBS 5090.0 g / 49.9 N

A thin sheet is not enough to absorb the full magnetic flux, which squanders power of the magnet. If you mount a strong magnet to a thin surface, the flux will penetrate right through and the holding will be smaller. To squeeze 100% of this magnet's power, you require a sufficiently solid element of metal. The material oversaturation means that on sheet metal structures (e.g., car bodies), the product shows lower pull force. We suggest choosing the steel dimension based on the following data.

Table 5: Working in heat (material behavior) - thermal limit
MP 15x7/3.5x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	5.09 kg / 11.22 LBS 5090.0 g / 49.9 N	OK
40 °C	-2.2%	4.98 kg / 10.97 LBS 4978.0 g / 48.8 N	OK
60 °C	-4.4%	4.87 kg / 10.73 LBS 4866.0 g / 47.7 N
80 °C	-6.6%	4.75 kg / 10.48 LBS 4754.1 g / 46.6 N
100 °C	-28.8%	3.62 kg / 7.99 LBS 3624.1 g / 35.6 N

Ordinary NdFeB products change their properties strength past the thermal threshold. Avoid high temperatures – excessive heat can irreversibly destroy this product. With every degree above norm, the magnet's capacity momentarily drops. Do not use this product close to ovens higher than its operating temperature limit. Exceeding the critical threshold will cause irreversible degradation of magnetism.

*Technical advisory: Heat tolerance is determined by both grade, as well as the dimension ratios. Low-profile magnets (low permeance coefficient) are more susceptible to demagnetization sooner than long magnets. Red status in the table signals a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - field range
MP 15x7/3.5x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	8.17 kg / 18.00 LBS 4 643 Gs	1.22 kg / 2.70 LBS 1225 g / 12.0 N	N/A
1 mm	7.39 kg / 16.29 LBS 5 810 Gs	1.11 kg / 2.44 LBS 1108 g / 10.9 N	6.65 kg / 14.66 LBS ~0 Gs
2 mm	6.55 kg / 14.45 LBS 5 472 Gs	0.98 kg / 2.17 LBS 983 g / 9.6 N	5.90 kg / 13.01 LBS ~0 Gs
3 mm	5.72 kg / 12.62 LBS 5 113 Gs	0.86 kg / 1.89 LBS 858 g / 8.4 N	5.15 kg / 11.35 LBS ~0 Gs
5 mm	4.19 kg / 9.23 LBS 4 374 Gs	0.63 kg / 1.38 LBS 628 g / 6.2 N	3.77 kg / 8.31 LBS ~0 Gs
10 mm	1.66 kg / 3.66 LBS 2 753 Gs	0.25 kg / 0.55 LBS 249 g / 2.4 N	1.49 kg / 3.29 LBS ~0 Gs
20 mm	0.24 kg / 0.54 LBS 1 053 Gs	0.04 kg / 0.08 LBS 36 g / 0.4 N	0.22 kg / 0.48 LBS ~0 Gs
50 mm	0.00 kg / 0.01 LBS 134 Gs	0.00 kg / 0.00 LBS 1 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
60 mm	0.00 kg / 0.00 LBS 83 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
70 mm	0.00 kg / 0.00 LBS 55 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
80 mm	0.00 kg / 0.00 LBS 38 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
90 mm	0.00 kg / 0.00 LBS 27 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
100 mm	0.00 kg / 0.00 LBS 20 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs

Two magnets attract each other from a wider radius than a magnet and sheet setup. The connection of magnet-to-magnet creates a more powerful interaction and a larger range of action. Designing a solid fastener? Utilize two neodymiums instead of one magnet and a striker plate. Exercise caution that when attracting two neodymiums, the impact force is huge. The levitation is marginally weaker than the connection force, but still large.
*The magnetic induction in repulsion mode reaches ~0 Gs at the midpoint between the magnets (caused by magnetic field nullification).
Important: Results refer to sliding force of dual same neodymium magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Safety (HSE) (electronics) - warnings
MP 15x7/3.5x5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	6.5 cm
Hearing aid	10 Gs (1.0 mT)	5.5 cm
Mechanical watch	20 Gs (2.0 mT)	4.0 cm
Mobile device	40 Gs (4.0 mT)	3.5 cm
Remote	50 Gs (5.0 mT)	3.0 cm
Payment card	400 Gs (40.0 mT)	1.5 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

Extremely neodym field poses a serious hazard to IT equipment and pacemakers. These neodymiums produce a field that prevents correct functioning of digital equipment. Remember: the invisible magnetic field passes through tissues and plastic. Increased vigilance must be taken by people with hearing aids and drug dispensers. Also at risk are: automatic timepieces, remotes, speakers, and screens. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Impact energy (kinetic energy) - collision effects
MP 15x7/3.5x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	29.26 km/h (8.13 m/s)	0.21 J
30 mm	49.78 km/h (13.83 m/s)	0.60 J
50 mm	64.25 km/h (17.85 m/s)	1.00 J
100 mm	90.87 km/h (25.24 m/s)	2.00 J

Magnetic elements are delicate – a strong collision with metal can result in shattering. Watch the impact speed – a neodymium left loose turns into a projectile. Impact energy can trigger coating fragments or dangerous crushing to fingers. Hold the magnet firmly during mounting so it doesn't slam with momentum against the steel surface. A collision at high speed ends with a crack of the neodymium. Wear safety glasses when handling with large magnets.

Table 9: Corrosion resistance
MP 15x7/3.5x5 / 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. Note the thickness of the protective layer.

Table 10: Electrical data (P_c)
MP 15x7/3.5x5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	4 791 Mx	47.9 µWb
P_c Coefficient	0.39	Low (Flat)

Total magnetic flux emitted by the magnet pole. Key data in coil applications and motors. P_c value defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MP 15x7/3.5x5 / N38

Environment	Effective steel pull	Effect
Air (land)	5.09 kg	Standard
Water (riverbed)	5.83 kg (+0.74 kg buoyancy gain)	+14.5%

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

The magnetic field penetrates through water without any losses. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Vertical hold

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

2. Steel thickness impact

*Thin metal sheet (e.g. 0.5mm PC case) drastically limits the holding force.

3. Power loss vs temp

*For standard magnets, 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) = 0.39

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 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: 030390-2026

Magnet Unit Converter

Magnet pull force

Kilograms (kg)

Force in lbs

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Gauss (Gs)

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The ring magnet with a hole MP 15x7/3.5x5 / N38 is created for mechanical fastening, where glue might fail or be insufficient. Thanks to the hole (often for a screw), this model enables quick installation to wood, wall, plastic, or metal. It is also often used in advertising for fixing signs and in workshops for organizing tools.

This is a crucial issue when working with model MP 15x7/3.5x5 / N38. Neodymium magnets are sintered ceramics, which means they are very brittle and inelastic. When tightening the screw, you must maintain great sensitivity. 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 flexible washer 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. 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 7/3.5 mm fits this model. For magnets with a straight hole, a conical head can act like a wedge and burst the magnet. Aesthetic mounting requires selecting the appropriate head size.

The presented product is a ring magnet with dimensions Ø15 mm (outer diameter) and height 5 mm. The pulling force of this model is an impressive 5.09 kg, which translates to 49.95 N in newtons. The mounting hole diameter is precisely 7/3.5 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.

Strengths as well as weaknesses of Nd₂Fe₁₄B magnets.

Pros

Besides their durability, neodymium magnets are valued for these benefits:

Their magnetic field is maintained, and after around 10 years it drops only by ~1% (according to research),
They possess excellent resistance to magnetic field loss when exposed to external fields,
Thanks to the smooth finish, the plating of Ni-Cu-Ni, gold-plated, or silver-plated gives an visually attractive appearance,
Neodymium magnets deliver maximum magnetic induction on a small surface, which ensures high operational effectiveness,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
Possibility of exact modeling and optimizing to complex conditions,
Key role in modern technologies – they are utilized in magnetic memories, electromotive mechanisms, medical devices, as well as multitasking production systems.
Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which allows their use in miniature devices

Weaknesses

Characteristics of disadvantages of neodymium magnets and ways of using them

Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a strong case, which not only protects them against impacts but also increases their durability
Neodymium magnets lose their power 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 durability even at temperatures up to 230°C
When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
Due to limitations in creating threads and complicated forms in magnets, we propose using casing - magnetic mechanism.
Potential hazard to health – tiny shards of magnets pose a threat, in case of ingestion, which becomes key in the aspect of protecting the youngest. Additionally, small elements of these magnets are able to disrupt the diagnostic process medical in case of swallowing.
With large orders the cost of neodymium magnets is economically unviable,

Lifting parameters

Best holding force of the magnet in ideal parameters – what contributes to it?

Holding force of 5.09 kg is a theoretical maximum value executed under the following configuration:

on a base made of structural steel, effectively closing the magnetic field
with a thickness no less than 10 mm
with an ground touching surface
without any insulating layer between the magnet and steel
for force acting at a right angle (pull-off, not shear)
at room temperature

Determinants of practical lifting force of a magnet

In practice, the actual lifting capacity results from several key aspects, presented from the most important:

Distance – existence of foreign body (paint, dirt, gap) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
Direction of force – maximum parameter is available only during perpendicular pulling. The shear force of the magnet along the plate is typically several times lower (approx. 1/5 of the lifting capacity).
Element thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet restricts the attraction force (the magnet "punches through" it).
Material type – ideal substrate is pure iron steel. Hardened steels may attract less.
Surface quality – the more even the surface, the better the adhesion and stronger the hold. Roughness creates an air distance.
Temperature influence – high temperature weakens magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, however under parallel forces the holding force is lower. Moreover, even a slight gap between the magnet and the plate decreases the lifting capacity.

Safety rules for work with neodymium magnets

Skin irritation risks

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If redness happens, immediately stop working with magnets and use protective gear.

Do not underestimate power

Use magnets with awareness. Their powerful strength can surprise even professionals. Stay alert and respect their power.

Serious injuries

Protect your hands. Two large magnets will snap together immediately with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!

Thermal limits

Monitor thermal conditions. Exposing the magnet to high heat will permanently weaken its magnetic structure and strength.

Protect data

Powerful magnetic fields can corrupt files on payment cards, HDDs, and other magnetic media. Stay away of at least 10 cm.

Dust is flammable

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

Magnet fragility

Watch out for shards. Magnets can fracture upon violent connection, ejecting sharp fragments into the air. Eye protection is mandatory.

Pacemakers

People with a pacemaker should maintain an safe separation from magnets. The magnetism can stop the operation of the life-saving device.

Compass and GPS

Be aware: neodymium magnets produce a field that confuses precision electronics. Maintain a separation from your phone, tablet, and navigation systems.

No play value

These products are not intended for children. Swallowing several magnets can lead to them connecting inside the digestive tract, which poses a severe health hazard and necessitates immediate surgery.

Caution! Learn more about hazards in the article: Magnet Safety Guide.

MP 15x7/3.5x5 / N38 - ring magnet

Physical properties - MP 15x7/3.5x5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical modeling of the magnet - data

Table 1: Static force (pull vs distance) - characteristics MP 15x7/3.5x5 / N38

Table 2: Vertical capacity (wall) MP 15x7/3.5x5 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces MP 15x7/3.5x5 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection MP 15x7/3.5x5 / N38

Table 5: Working in heat (material behavior) - thermal limit MP 15x7/3.5x5 / N38

Table 6: Two magnets (attraction) - field range MP 15x7/3.5x5 / N38

Table 7: Safety (HSE) (electronics) - warnings MP 15x7/3.5x5 / N38

Table 8: Impact energy (kinetic energy) - collision effects MP 15x7/3.5x5 / N38

Table 9: Corrosion resistance MP 15x7/3.5x5 / N38

Table 10: Electrical data (Pc) MP 15x7/3.5x5 / N38

Table 11: Underwater work (magnet fishing) MP 15x7/3.5x5 / N38

1. Vertical hold

2. Steel thickness impact

3. Power loss vs temp

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

Chemical composition

Sustainability

Magnet pull force

Field Strength

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Strengths as well as weaknesses of Nd2Fe14B magnets.

Pros

Weaknesses

Lifting parameters

Best holding force of the magnet in ideal parameters – what contributes to it?

Determinants of practical lifting force of a magnet

Safety rules for work with neodymium magnets

Skin irritation risks

Do not underestimate power

Serious injuries

Thermal limits

Protect data

Dust is flammable

Magnet fragility

Pacemakers

Compass and GPS

No play value

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs distance) - characteristics
MP 15x7/3.5x5 / N38

Table 2: Vertical capacity (wall)
MP 15x7/3.5x5 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MP 15x7/3.5x5 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection
MP 15x7/3.5x5 / N38

Table 5: Working in heat (material behavior) - thermal limit
MP 15x7/3.5x5 / N38

Table 6: Two magnets (attraction) - field range
MP 15x7/3.5x5 / N38

Table 7: Safety (HSE) (electronics) - warnings
MP 15x7/3.5x5 / N38

Table 8: Impact energy (kinetic energy) - collision effects
MP 15x7/3.5x5 / N38

Table 9: Corrosion resistance
MP 15x7/3.5x5 / N38

Table 10: Electrical data (P_c)
MP 15x7/3.5x5 / N38

Table 11: Underwater work (magnet fishing)
MP 15x7/3.5x5 / N38

Strengths as well as weaknesses of Nd₂Fe₁₄B magnets.