Product available Ships tomorrow

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 parameters »

3.44 ZŁ with VAT / pcs + price for transport

2.80 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

2.80 ZŁ

3.44 ZŁ

price from 250 pcs

2.63 ZŁ

3.24 ZŁ

price from 900 pcs

2.46 ZŁ

3.03 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Can't decide what to choose?

Call us now +48 888 99 98 98 if you prefer contact us via contact form through our site.
Weight along with form of a magnet can be analyzed using our modular calculator.

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

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

Physical modeling of the magnet - data

These information represent the outcome of a engineering simulation. Values are based on models for the material Nd₂Fe₁₄B. Operational performance might slightly differ. Treat these data as a preliminary roadmap for designers.

Table 1: Static force (force 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	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

Grip strength weakens drastically with every mm of distance. Note that even a very thin break (e.g., contamination, paint, veneer) strongly reduces the pull force. Magnets operate strongest at the point of direct contact; distance nullifies the power. Analyze how rapidly the load capacity fall, when the magnet does not touch tightly to the steel surface. When designing the mounting, eliminate redundant distances.

Table 2: Sliding hold (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 following data calculates the approximate holding capacity necessary to start the slippage of the magnet down on a vertical steel wall (assuming standard friction). The holding force varies with the gap size between the magnet and the surface.

Table 3: Wall mounting (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 magnet on a upright plane (e.g., a board), it will only hold just about 1/5 of its maximum pull force. Gravitational force and a weak degree of grip cause that magnets slide down easier than they pull off. Want to create a wall mount? Remember that the shear force is noticeably lower than the maximum static pull force. On a smooth steel, the magnet will slide down under a noticeably lighter weight. Utilizing a rubberized layer can effectively improve the result.

Table 4: Material efficiency (saturation) - 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 wastes potential of the magnet. If you install a neodymium to a too thin substrate, the field will penetrate right through and the holding will be smaller. To utilize 100% of this magnet's potential, you require a sufficiently solid element of metal. The material oversaturation means that on thin elements (e.g., appliance housings), the magnet works worse. We recommend selecting the steel thickness from these parameters.

Table 5: Thermal stability (stability) - 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 power after exceeding the maximum temperature. Protect against heat – high temperature can irreversibly demagnetize this product. As the temperature rises, the magnet's capacity briefly decreases. Avoid using this magnet close to ovens exceeding its operating temperature limit. Too high temperature will result in permanent loss of magnetic properties.

*Important note: Temperature resistance depends not only on the material grade, as well as the dimension ratios. Thin magnets (low Pc) are more susceptible to demagnetization sooner than long magnets. Warning indicator in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (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 magnets interact from a much further distance than a neodymium and metal combination. The setup of magnet-to-magnet produces a massive flux and a larger range of action. Designing a solid fastener? Utilize two neodymiums instead of one magnet and a striker plate. Remember that when bringing together two magnets, the pinch force is huge. The levitation is a bit weaker than the attraction, but still significant.
*The magnetic induction between like poles is approximately ~0 Gs in the exact middle between the magnets (resulting from vector opposition).
Attention: Figures apply to friction force of a pair of matching neodymium magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Hazards (implants) - precautionary measures
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
Phone / Smartphone	40 Gs (4.0 mT)	3.5 cm
Car key	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

A strong magnetic field is a serious hazard to IT equipment as well as medical implants. These neodymiums generate a flux that disrupts operation of sensitive medical devices. Notice: the invisible magnetic field acts through matter and glass. Increased vigilance must be exercised by people with hearing aids and drug dispensers. The risk also applies to: mechanical watches, car keys, membranes, and displays. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Collisions (cracking risk) - 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

Magnetic elements are delicate – a strong collision with metal causes immediate chipping. Control the attraction moment – a neodymium left loose speeds with massive force. Kinetic force can cause material chips or painful pinches to fingers. Be sure to control the product during mounting 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 handling with large magnets.

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)

The SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction data (Flux)
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 passing through the magnet pole. Essential parameter when building generators as well as sensors. The P_c coefficient defines the magnet's operating point.

Table 11: Physics of underwater searching
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!

Contrary to myths, water does not block the magnetic field. However, remember the water resistance when pulling the rope quickly.

1. Shear force

*Caution: On a vertical wall, the magnet retains merely a fraction of its perpendicular strength.

2. Efficiency vs thickness

*Thin metal sheet (e.g. 0.5mm PC case) drastically reduces 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

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.

Engineering data and GPSR

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%

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

Quick Unit Converter

Magnet pull force

Force in lbs

Magnetic Induction

Gauss (Gs)

Induction (T)

Just populate a single box, to let the tool compute everything else automatically.

Other offers

Product available Ships tomorrow

XT-5 magnetyzery do silników - DIESEL + powietrze - XT-5 magnetizer

94.99 ZŁ brutto / pcs

Product available Ships tomorrow

MPL 15x3x6 / N38 - lamellar magnet

0.726 ZŁ brutto / pcs

Product available Ships tomorrow

UMGGZ 43x6 [M6] GZ / N38 - rubber magnetic holder external thread

10.46 ZŁ brutto / pcs

Product available Ships tomorrow

SM 32x125 [2xM8] / N52 - magnetic separator

455.10 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. Thanks to the hole (often for a screw), this model enables quick installation to wood, wall, plastic, or metal. This product with a force of 5.09 kg works great as a cabinet closure, speaker holder, or spacer element in devices.

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. One turn too many can destroy the magnet, so do it slowly. 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 can be damaged 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.

The inner hole diameter determines the maximum size of the mounting element. 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.

It is a magnetic ring with a diameter of 15 mm and thickness 5 mm. The key parameter here is the holding force amounting to approximately 5.09 kg (force ~49.95 N). 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). When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Strengths as well as weaknesses of rare earth magnets.

Advantages

Apart from their superior magnetism, neodymium magnets have these key benefits:

They have unchanged lifting capacity, and over nearly 10 years their performance decreases symbolically – ~1% (in testing),
Magnets very well resist against loss of magnetization caused by ambient magnetic noise,
In other words, due to the shiny surface of gold, the element becomes visually attractive,
They feature high magnetic induction at the operating surface, which improves attraction properties,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
Possibility of individual creating and modifying to concrete requirements,
Huge importance in high-tech industry – they are utilized in magnetic memories, motor assemblies, advanced medical instruments, as well as complex engineering applications.
Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which enables their usage in small systems

Limitations

Characteristics of disadvantages of neodymium magnets: application proposals

At very strong impacts they can crack, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
NdFeB magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
Limited possibility of producing threads in the magnet and complex shapes - recommended is cover - magnetic holder.
Health risk to health – tiny shards of magnets pose a threat, in case of ingestion, which gains importance in the context of child safety. It is also worth noting that small components of these magnets are able to disrupt the diagnostic process medical after entering the body.
High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities

Lifting parameters

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

Magnet power was determined for the most favorable conditions, taking into account:

on a base made of mild steel, perfectly concentrating the magnetic flux
with a cross-section no less than 10 mm
characterized by lack of roughness
under conditions of ideal adhesion (surface-to-surface)
during detachment in a direction vertical to the mounting surface
at temperature room level

Determinants of practical lifting force of a magnet

Bear in mind that the application force will differ subject to the following factors, in order of importance:

Clearance – existence of any layer (rust, tape, air) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the nominal value.
Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
Material composition – different alloys reacts the same. High carbon content worsen the interaction with the magnet.
Surface finish – ideal contact is possible only on polished steel. Rough texture reduce the real contact area, reducing force.
Temperature influence – hot environment reduces pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the holding force is lower. Moreover, even a slight gap between the magnet’s surface and the plate lowers the holding force.

H&S for magnets

Electronic hazard

Do not bring magnets close to a purse, computer, or screen. The magnetic field can irreversibly ruin these devices and erase data from cards.

Crushing risk

Large magnets can break fingers in a fraction of a second. Under no circumstances place your hand between two attracting surfaces.

Handling guide

Handle magnets consciously. Their powerful strength can shock even professionals. Stay alert and respect their power.

Compass and GPS

Remember: neodymium magnets produce a field that confuses sensitive sensors. Keep a separation from your mobile, device, and navigation systems.

Operating temperature

Do not overheat. NdFeB magnets are sensitive to heat. If you need operation above 80°C, look for HT versions (H, SH, UH).

Pacemakers

Warning for patients: Powerful magnets disrupt electronics. Keep minimum 30 cm distance or ask another person to work with the magnets.

Magnet fragility

Neodymium magnets are ceramic materials, meaning they are fragile like glass. Clashing of two magnets will cause them cracking into small pieces.

Dust is flammable

Powder generated during machining of magnets is flammable. Do not drill into magnets unless you are an expert.

Adults only

Adult use only. Small elements pose a choking risk, leading to serious injuries. Keep away from children and animals.

Warning for allergy sufferers

Certain individuals suffer from a sensitization to nickel, which is the typical protective layer for NdFeB magnets. Prolonged contact may cause dermatitis. We strongly advise use protective gloves.

Safety First! Need more info? 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

Physical modeling of the magnet - data

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

Table 2: Sliding hold (vertical surface) MP 15x7/3.5x5 / N38

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

Table 4: Material efficiency (saturation) - sheet metal selection MP 15x7/3.5x5 / N38

Table 5: Thermal stability (stability) - resistance threshold MP 15x7/3.5x5 / N38

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

Table 7: Hazards (implants) - precautionary measures MP 15x7/3.5x5 / N38

Table 8: Collisions (cracking risk) - warning MP 15x7/3.5x5 / N38

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

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

Table 11: Physics of underwater searching MP 15x7/3.5x5 / N38

1. Shear force

2. Efficiency vs thickness

3. Power loss vs temp

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

Chemical composition

Environmental data

Magnet pull force

Magnetic Induction

Other offers

XT-5 magnetyzery do silników - DIESEL + powietrze - XT-5 magnetizer

MPL 15x3x6 / N38 - lamellar magnet

UMGGZ 43x6 [M6] GZ / N38 - rubber magnetic holder external thread

SM 32x125 [2xM8] / N52 - magnetic separator

Strengths as well as weaknesses of rare earth magnets.

Advantages

Limitations

Lifting parameters

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

Determinants of practical lifting force of a magnet

H&S for magnets

Electronic hazard

Crushing risk

Handling guide

Compass and GPS

Operating temperature

Pacemakers

Magnet fragility

Dust is flammable

Adults only

Warning for allergy sufferers

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

Table 2: Sliding hold (vertical surface)
MP 15x7/3.5x5 / N38

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

Table 4: Material efficiency (saturation) - sheet metal selection
MP 15x7/3.5x5 / N38

Table 5: Thermal stability (stability) - resistance threshold
MP 15x7/3.5x5 / N38

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

Table 7: Hazards (implants) - precautionary measures
MP 15x7/3.5x5 / N38

Table 8: Collisions (cracking risk) - warning
MP 15x7/3.5x5 / N38

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

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

Table 11: Physics of underwater searching
MP 15x7/3.5x5 / N38