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MP 15x7/3.5x5 / 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 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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Strength along with form of a neodymium magnet can be reviewed on our force calculator.

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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 - technical parameters

The following information are the direct effect of a physical calculation. Results were calculated on algorithms for the class Nd₂Fe₁₄B. Real-world parameters may deviate from the simulation results. Use these calculations as a reference point for designers.

Table 1: Static force (pull vs distance) - interaction chart
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	warning
1 mm	2736 Gs 273.6 mT	4.09 kg / 9.01 lbs 4085.7 g / 40.1 N	warning
2 mm	2372 Gs 237.2 mT	3.07 kg / 6.77 lbs 3069.9 g / 30.1 N	warning
3 mm	2007 Gs 200.7 mT	2.20 kg / 4.84 lbs 2197.4 g / 21.6 N	warning
5 mm	1377 Gs 137.7 mT	1.03 kg / 2.28 lbs 1034.5 g / 10.1 N	safe
10 mm	526 Gs 52.6 mT	0.15 kg / 0.33 lbs 151.3 g / 1.5 N	safe
15 mm	232 Gs 23.2 mT	0.03 kg / 0.06 lbs 29.3 g / 0.3 N	safe
20 mm	118 Gs 11.8 mT	0.01 kg / 0.02 lbs 7.6 g / 0.1 N	safe
30 mm	42 Gs 4.2 mT	0.00 kg / 0.00 lbs 0.9 g / 0.0 N	safe
50 mm	10 Gs 1.0 mT	0.00 kg / 0.00 lbs 0.1 g / 0.0 N	safe

Pulling power drops significantly with every mm of spacing. Note that even a microscopic distance (e.g., dirt, paint, rust) strongly weakens the grip. Neodymiums operate most effectively at the point of direct contact; distance drastically cuts the power. Notice how rapidly the load capacity plummet, when the magnet does not touch tightly to the metal substrate. When designing the arrangement, discard unnecessary gaps.

Table 2: Shear capacity (vertical surface)
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 calculates the theoretical weight limit needed to initiate the sliding of the magnet downwards along a vertical steel wall (considering standard friction). The holding force depends on the gap size between the magnet and the surface.

Table 3: Vertical assembly (sliding) - 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 mounting a element on a vertical wall (e.g., a board), it you can count on just approx. 20%-30% of nominal attraction strength. Gravity and a low friction coefficient cause that products move down faster than they pop off the substrate. Planning a wall mount? Note that the shear force is much weaker than the perpendicular breakaway force. On a painted metal, the holder will give way down under a noticeably lighter weight. Using a rubber layer can significantly improve the result.

Table 4: Material efficiency (substrate influence) - power losses
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 metal plate is not enough to absorb the entire magnetic field, which squanders power of the holder. Should you install a neodymium to a weak sheet, the flux will penetrate right through and the holding will be smaller. To squeeze 100% of this magnet's potential, you require a sufficiently solid element of steel. The saturation effect means that on delicate walls (e.g., thin profiles), the magnet holds weaker. We advise picking the steel cross-section according to the table below.

Table 5: Working in heat (material behavior) - resistance threshold
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

Standard neodymium magnets change their properties parameters past the thermal threshold. Watch out for overheating – high temperature can irreversibly demagnetize this magnet. As the temperature rises, the magnet's force temporarily decreases. Avoid using this magnet near heat sources exceeding its working range. Exceeding the critical threshold will lead to permanent loss of magnetism.

*Technical advisory: Temperature resistance is determined by both grade, as well as the dimension ratios. Flat magnets (low Pc) are more susceptible to demagnetization sooner than taller cylinders. The danger warning in the table signals permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - field range
MP 15x7/3.5x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear 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 magnetic products attract each other from a wider radius than a neodymium and metal setup. Such a system of two magnets creates a more powerful interaction and a larger range of performance. Want to build a powerful holder? Use a pair of magnets instead of a neodymium and a striker plate. Remember that when connecting a pair of magnets, the pinch force is extreme. The repulsion force is a bit weaker than the attraction, but still impressive.
*Field value for N-N configuration drops to ~0 Gs in the exact middle between the magnets (caused by magnetic field nullification).
Attention: Estimates show friction force of a pair of identical magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Protective zones (implants) - 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
Timepiece	20 Gs (2.0 mT)	4.0 cm
Phone / Smartphone	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

Powerful magnet radiation is a real danger to electronic devices as well as medical implants. These neodymiums produce a field that destroys function of digital equipment. Notice: the unseen radiation acts through matter and plastic. Special caution must be taken by people with cochlear implants and drug dispensers. Also at risk are: automatic timepieces, car keys, speakers, and displays. Do not bring the product near payment cards, HDD media, or sensitive navigation tools.

Table 8: Dynamics (kinetic energy) - warning
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

NdFeB products are delicate – a violent impact against metal causes immediate chipping. Watch the impact speed – a magnet released freely becomes dangerous. Striking energy can cause material chips or painful pinches to fingers. Be sure to control the product during installation so it doesn't hit violently against the metal. A contact at a velocity of dozens of km/h means shattering of the neodymium. Wear safety glasses when playing with powerful specimens.

Table 9: Coating parameters (durability)
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: Construction 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)

Flux value emitted by the pole surface. Key data for generator designers as well as sensors. P_c value defines the working geometry.

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%

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

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. Vertical hold

*Warning: On a vertical surface, the magnet holds only a fraction of its nominal pull.

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) severely reduces the holding force.

3. Heat tolerance

*For N38 grade, the critical limit 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 and environmental data

Material specification

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: 030390-2026

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The ring magnet with a hole MP 15x7/3.5x5 / 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. 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 hard but breakable and inelastic. When tightening the screw, you must maintain caution. We recommend tightening manually with a screwdriver, not an impact driver, because too much pressure will cause the ring to crack. The flat screw head should evenly press the magnet. 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. 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 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. 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 (15 mm), so it doesn't protrude beyond the outline.

The presented product is a ring magnet with dimensions Ø15 mm (outer diameter) and height 5 mm. The key parameter here is the lifting capacity amounting to approximately 5.09 kg (force ~49.95 N). The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 7/3.5 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). When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Pros and cons of Nd₂Fe₁₄B magnets.

Pros

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

They retain full power for around 10 years – the loss is just ~1% (based on simulations),
They show high resistance to demagnetization induced by external disturbances,
A magnet with a smooth silver surface looks better,
Magnetic induction on the surface of the magnet remains impressive,
Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
Possibility of exact machining and adjusting to individual applications,
Huge importance in future technologies – they serve a role in magnetic memories, brushless drives, diagnostic systems, and technologically advanced constructions.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which allows their use in miniature devices

Weaknesses

What to avoid - cons of neodymium magnets: tips and applications.

They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
Magnets exposed to a humid environment can rust. Therefore during using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
Due to limitations in realizing threads and complex shapes in magnets, we recommend using cover - magnetic mount.
Potential hazard to health – tiny shards of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child safety. Additionally, small elements of these magnets can be problematic in diagnostics medical in case of swallowing.
High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Holding force characteristics

Breakaway strength of the magnet in ideal conditions – what contributes to it?

The specified lifting capacity refers to the peak performance, measured under ideal test conditions, meaning:

with the contact of a sheet made of low-carbon steel, guaranteeing maximum field concentration
possessing a thickness of min. 10 mm to ensure full flux closure
with an ideally smooth contact surface
under conditions of no distance (surface-to-surface)
under perpendicular force direction (90-degree angle)
in neutral thermal conditions

Lifting capacity in real conditions – factors

Please note that the application force will differ depending on elements below, starting with the most relevant:

Clearance – the presence of foreign body (paint, tape, gap) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
Force direction – declared lifting capacity refers to pulling vertically. When slipping, the magnet exhibits significantly lower power (typically approx. 20-30% of maximum force).
Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
Material composition – not every steel attracts identically. Alloy additives worsen the attraction effect.
Surface structure – the more even the surface, the larger the contact zone and higher the lifting capacity. Roughness creates an air distance.
Temperature – temperature increase causes a temporary drop of force. 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, 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 reduces the holding force.

H&S for magnets

Power loss in heat

Avoid heat. Neodymium magnets are sensitive to heat. If you need operation above 80°C, ask us about special high-temperature series (H, SH, UH).

Magnet fragility

Despite the nickel coating, neodymium is delicate and not impact-resistant. Do not hit, as the magnet may shatter into hazardous fragments.

Machining danger

Machining of neodymium magnets poses a fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Pacemakers

Warning for patients: Strong magnetic fields disrupt medical devices. Maintain minimum 30 cm distance or ask another person to handle the magnets.

Handling rules

Use magnets consciously. Their immense force can shock even experienced users. Plan your moves and do not underestimate their power.

Allergy Warning

A percentage of the population have a contact allergy to Ni, which is the standard coating for NdFeB magnets. Frequent touching can result in an allergic reaction. We suggest wear safety gloves.

Serious injuries

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

Choking Hazard

Only for adults. Small elements can be swallowed, leading to serious injuries. Store out of reach of kids and pets.

Threat to navigation

A strong magnetic field negatively affects the operation of compasses in smartphones and navigation systems. Do not bring magnets near a smartphone to prevent damaging the sensors.

Data carriers

Avoid bringing magnets close to a wallet, computer, or TV. The magnetic field can destroy these devices and erase data from cards.

Caution! Want to know more? Check our post: Are neodymium magnets dangerous?

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 - technical parameters

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

Table 2: Shear capacity (vertical surface) MP 15x7/3.5x5 / N38

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

Table 4: Material efficiency (substrate influence) - power losses MP 15x7/3.5x5 / N38

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

Table 6: Magnet-Magnet interaction (repulsion) - field range MP 15x7/3.5x5 / N38

Table 7: Protective zones (implants) - warnings MP 15x7/3.5x5 / N38

Table 8: Dynamics (kinetic energy) - warning MP 15x7/3.5x5 / N38

Table 9: Coating parameters (durability) MP 15x7/3.5x5 / N38

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

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

1. Vertical hold

2. Plate thickness effect

3. Heat tolerance

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

Material specification

Environmental data

Magnet pull force

Magnetic Field

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Pros and cons of Nd2Fe14B magnets.

Pros

Weaknesses

Holding force characteristics

Breakaway strength of the magnet in ideal conditions – what contributes to it?

Lifting capacity in real conditions – factors

H&S for magnets

Power loss in heat

Magnet fragility

Machining danger

Pacemakers

Handling rules

Allergy Warning

Serious injuries

Choking Hazard

Threat to navigation

Data carriers

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

Table 2: Shear capacity (vertical surface)
MP 15x7/3.5x5 / N38

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

Table 4: Material efficiency (substrate influence) - power losses
MP 15x7/3.5x5 / N38

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

Table 6: Magnet-Magnet interaction (repulsion) - field range
MP 15x7/3.5x5 / N38

Table 7: Protective zones (implants) - warnings
MP 15x7/3.5x5 / N38

Table 8: Dynamics (kinetic energy) - warning
MP 15x7/3.5x5 / N38

Table 9: Coating parameters (durability)
MP 15x7/3.5x5 / N38

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

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

Pros and cons of Nd₂Fe₁₄B magnets.