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MP 25x13x4 / 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 030190

GTIN/EAN: 5906301812074

5.00

Diameter

25 mm [±0,1 mm]

internal diameter Ø

13 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

10.74 g

Magnetization Direction

↑ axial

Load capacity

4.14 kg / 40.57 N

Magnetic Induction

188.92 mT / 1889 Gs

Coating

[NiCuNi] Nickel

see parameters »

6.77 ZŁ with VAT / pcs + price for transport

5.50 ZŁ net + 23% VAT / pcs

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Weight as well as structure of a neodymium magnet can be estimated on our power calculator.

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Technical data - MP 25x13x4 / N38 - ring magnet

Specification / characteristics - MP 25x13x4 / N38 - ring magnet

properties

properties	values
Cat. no.	030190
GTIN/EAN	5906301812074
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	25 mm [±0,1 mm]
internal diameter Ø	13 mm [±0,1 mm]
Height	4 mm [±0,1 mm]
Weight	10.74 g
Magnetization Direction	↑ axial
Load capacity ~ ?	4.14 kg / 40.57 N
Magnetic Induction ~ ?	188.92 mT / 1889 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 25x13x4 / 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 analysis of the magnet - technical parameters

The following information represent the result of a physical analysis. Results are based on algorithms for the material Nd₂Fe₁₄B. Operational conditions may differ. Treat these calculations as a reference point for designers.

Table 1: Static force (pull vs gap) - interaction chart
MP 25x13x4 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5777 Gs 577.7 mT	4.14 kg / 9.13 pounds 4140.0 g / 40.6 N	strong
1 mm	5310 Gs 531.0 mT	3.50 kg / 7.71 pounds 3497.4 g / 34.3 N	strong
2 mm	4846 Gs 484.6 mT	2.91 kg / 6.42 pounds 2912.4 g / 28.6 N	strong
3 mm	4397 Gs 439.7 mT	2.40 kg / 5.29 pounds 2398.5 g / 23.5 N	strong
5 mm	3576 Gs 357.6 mT	1.59 kg / 3.50 pounds 1586.2 g / 15.6 N	safe
10 mm	2073 Gs 207.3 mT	0.53 kg / 1.17 pounds 532.9 g / 5.2 N	safe
15 mm	1231 Gs 123.1 mT	0.19 kg / 0.41 pounds 188.0 g / 1.8 N	safe
20 mm	773 Gs 77.3 mT	0.07 kg / 0.16 pounds 74.0 g / 0.7 N	safe
30 mm	356 Gs 35.6 mT	0.02 kg / 0.03 pounds 15.7 g / 0.2 N	safe
50 mm	115 Gs 11.5 mT	0.00 kg / 0.00 pounds 1.6 g / 0.0 N	safe

Magnetic force drops drastically with every subsequent millimeter of spacing. Note that every additional insulation layer (e.g., dirt, varnish, dust) significantly weakens the grip. Magnets work optimally during direct contact; air break weakens the force. See how rapidly the pull force drop, when the product does not adhere tightly to the metal substrate. When planning the arrangement, avoid unnecessary gaps.

Table 2: Slippage load (vertical surface)
MP 25x13x4 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.83 kg / 1.83 pounds 828.0 g / 8.1 N
1 mm	Stal (~0.2)	0.70 kg / 1.54 pounds 700.0 g / 6.9 N
2 mm	Stal (~0.2)	0.58 kg / 1.28 pounds 582.0 g / 5.7 N
3 mm	Stal (~0.2)	0.48 kg / 1.06 pounds 480.0 g / 4.7 N
5 mm	Stal (~0.2)	0.32 kg / 0.70 pounds 318.0 g / 3.1 N
10 mm	Stal (~0.2)	0.11 kg / 0.23 pounds 106.0 g / 1.0 N
15 mm	Stal (~0.2)	0.04 kg / 0.08 pounds 38.0 g / 0.4 N
20 mm	Stal (~0.2)	0.01 kg / 0.03 pounds 14.0 g / 0.1 N
30 mm	Stal (~0.2)	0.00 kg / 0.01 pounds 4.0 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 estimated holding capacity sufficient to start the shifting of the magnet down along a vertical metal surface (assuming standard friction coefficient). This parameter varies with the separation distance between the magnet and the surface.

Table 3: Vertical assembly (shearing) - vertical pull
MP 25x13x4 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.24 kg / 2.74 pounds 1242.0 g / 12.2 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.83 kg / 1.83 pounds 828.0 g / 8.1 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.41 kg / 0.91 pounds 414.0 g / 4.1 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	2.07 kg / 4.56 pounds 2070.0 g / 20.3 N

When hanging a holder on a vertical surface (e.g., a car body), it will only hold only approx. 20%-30% of its maximum pull force. Gravity as well as a weak degree of grip influence the fact that magnets slide down faster than they pull off. Planning a vertical fastening? Note that the sliding force is significantly lower than the maximum static pull force. On a slippery surface, the holder will slip down under a significantly smaller load. Using a rubber coating can effectively improve the result.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MP 25x13x4 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.41 kg / 0.91 pounds 414.0 g / 4.1 N
1 mm	25%	1.04 kg / 2.28 pounds 1035.0 g / 10.2 N
2 mm	50%	2.07 kg / 4.56 pounds 2070.0 g / 20.3 N
3 mm	75%	3.10 kg / 6.85 pounds 3105.0 g / 30.5 N
5 mm	100%	4.14 kg / 9.13 pounds 4140.0 g / 40.6 N
10 mm	100%	4.14 kg / 9.13 pounds 4140.0 g / 40.6 N
11 mm	100%	4.14 kg / 9.13 pounds 4140.0 g / 40.6 N
12 mm	100%	4.14 kg / 9.13 pounds 4140.0 g / 40.6 N

A too thin steel cannot focus the full magnetic flux, which squanders power of the holder. If you install a neodymium to a thin surface, the magnetism will penetrate right through and the attraction force will be weaker. To squeeze 100% of this neodymium's potential, you require a sufficiently solid element of metal. The saturation phenomenon means that on thin elements (e.g., thin profiles), the magnet holds weaker. We suggest choosing the steel cross-section according to the table below.

Table 5: Thermal resistance (material behavior) - thermal limit
MP 25x13x4 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	4.14 kg / 9.13 pounds 4140.0 g / 40.6 N	OK
40 °C	-2.2%	4.05 kg / 8.93 pounds 4048.9 g / 39.7 N	OK
60 °C	-4.4%	3.96 kg / 8.73 pounds 3957.8 g / 38.8 N	OK
80 °C	-6.6%	3.87 kg / 8.52 pounds 3866.8 g / 37.9 N
100 °C	-28.8%	2.95 kg / 6.50 pounds 2947.7 g / 28.9 N

Standard neodymium magnets lose power past the thermal threshold. Protect against heat – excessive heat can irreversibly destroy this product. With every degree above norm, the magnet's capacity briefly lowers. Avoid using this product in hot environments exceeding its working range. Too high temperature will result in destruction of magnetism.

*Important note: Heat tolerance depends not only on the material grade, but also on the magnet's shape. Thin magnets (low permeance coefficient) may lose charge permanently sooner than long magnets. Red status in the table points to permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MP 25x13x4 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	83.66 kg / 184.44 pounds 6 082 Gs	12.55 kg / 27.67 pounds 12549 g / 123.1 N	N/A
1 mm	77.09 kg / 169.95 pounds 11 091 Gs	11.56 kg / 25.49 pounds 11563 g / 113.4 N	69.38 kg / 152.95 pounds ~0 Gs
2 mm	70.68 kg / 155.81 pounds 10 620 Gs	10.60 kg / 23.37 pounds 10601 g / 104.0 N	63.61 kg / 140.23 pounds ~0 Gs
3 mm	64.59 kg / 142.40 pounds 10 153 Gs	9.69 kg / 21.36 pounds 9689 g / 95.0 N	58.13 kg / 128.16 pounds ~0 Gs
5 mm	53.48 kg / 117.90 pounds 9 238 Gs	8.02 kg / 17.68 pounds 8022 g / 78.7 N	48.13 kg / 106.11 pounds ~0 Gs
10 mm	32.05 kg / 70.66 pounds 7 152 Gs	4.81 kg / 10.60 pounds 4808 g / 47.2 N	28.85 kg / 63.60 pounds ~0 Gs
20 mm	10.77 kg / 23.74 pounds 4 145 Gs	1.62 kg / 3.56 pounds 1615 g / 15.8 N	9.69 kg / 21.37 pounds ~0 Gs
50 mm	0.66 kg / 1.45 pounds 1 024 Gs	0.10 kg / 0.22 pounds 99 g / 1.0 N	0.59 kg / 1.30 pounds ~0 Gs
60 mm	0.32 kg / 0.70 pounds 712 Gs	0.05 kg / 0.10 pounds 48 g / 0.5 N	0.29 kg / 0.63 pounds ~0 Gs
70 mm	0.17 kg / 0.36 pounds 514 Gs	0.02 kg / 0.05 pounds 25 g / 0.2 N	0.15 kg / 0.33 pounds ~0 Gs
80 mm	0.09 kg / 0.20 pounds 383 Gs	0.01 kg / 0.03 pounds 14 g / 0.1 N	0.08 kg / 0.18 pounds ~0 Gs
90 mm	0.05 kg / 0.12 pounds 293 Gs	0.01 kg / 0.02 pounds 8 g / 0.1 N	0.05 kg / 0.11 pounds ~0 Gs
100 mm	0.03 kg / 0.07 pounds 230 Gs	0.00 kg / 0.01 pounds 5 g / 0.0 N	0.03 kg / 0.07 pounds ~0 Gs

Two magnets interact from a significantly greater distance than a magnet and sheet setup. Such a system of two magnets generates a stronger field and a larger range of performance. Designing a strong closure? Utilize two neodymiums instead of a neodymium and a steel. Remember that when attracting two neodymiums, the pinch force is huge. The repulsion force is slightly lower than the attraction, but still impressive.
*The magnetic induction between like poles reaches ~0 Gs at the midpoint of the gap (resulting from vector opposition).
Attention: Figures refer to sliding force of dual same neodymium magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Hazards (implants) - precautionary measures
MP 25x13x4 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	17.0 cm
Hearing aid	10 Gs (1.0 mT)	13.5 cm
Mechanical watch	20 Gs (2.0 mT)	10.5 cm
Mobile device	40 Gs (4.0 mT)	8.0 cm
Remote	50 Gs (5.0 mT)	7.5 cm
Payment card	400 Gs (40.0 mT)	3.0 cm
HDD hard drive	600 Gs (60.0 mT)	2.5 cm

Powerful magnet radiation poses a serious hazard to IT equipment and pacemakers. These neodymiums produce a flux that destroys function of sensitive medical devices. Be aware: the unseen radiation acts through matter and glass. Exceptional care must be taken by people with cochlear implants and insulin pumps. Influence will be felt by: automatic timepieces, car keys, speakers, and screens. Do not bring the product near payment cards, hard drives, or precise measuring instruments.

Table 8: Impact energy (kinetic energy) - warning
MP 25x13x4 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	21.33 km/h (5.93 m/s)	0.19 J
30 mm	34.38 km/h (9.55 m/s)	0.49 J
50 mm	44.29 km/h (12.30 m/s)	0.81 J
100 mm	62.62 km/h (17.39 m/s)	1.62 J

Neodymium magnets are prone to chipping – a violent impact against metal can result in shattering. Pay attention to connection velocity – a neodymium left loose speeds with massive force. Kinetic force can trigger coating fragments or injury to fingers. Be sure to control the product during bringing near metal so it doesn't hit violently against the metal. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Use safety goggles when playing with large magnets.

Table 9: Anti-corrosion coating durability
MP 25x13x4 / 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: Electrical data (P_c)
MP 25x13x4 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	24 861 Mx	248.6 µWb
P_c Coefficient	1.02	High (Stable)

Total magnetic flux emitted by the pole surface. Key data for generator designers as well as sensors. The P_c coefficient defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MP 25x13x4 / N38

Environment	Effective steel pull	Effect
Air (land)	4.14 kg	Standard
Water (riverbed)	4.74 kg (+0.60 kg buoyancy gain)	+14.5%

Rust risk: 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. Buoyancy helps in lifting finds.

1. Vertical hold

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

2. Steel thickness impact

*Thin steel (e.g. computer case) drastically reduces the holding force.

3. Thermal stability

*For standard magnets, the safety limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 1.02

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.

Engineering data and GPSR

Elemental analysis

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

Environmental data

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

Safety card (GPSR)

responsible entity

Dhit sp. z o.o.

ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki

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

batch number/type

id: 030190-2026

Measurement Calculator

Magnet pull force

Force in kg

Newtons (N)

lbs

Magnetic Induction

Gauss (Gs)

Input your value in a single field to see the conversion in the other units at once.

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The ring magnet with a hole MP 25x13x4 / N38 is created for mechanical fastening, where glue might fail or be insufficient. Mounting is clean and reversible, unlike gluing. This product with a force of 4.14 kg works great as a door latch, speaker holder, or mounting element in devices.

This is a crucial issue when working with model MP 25x13x4 / N38. Neodymium magnets are sintered ceramics, which means they are very brittle 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.

These magnets are coated with standard Ni-Cu-Ni plating, which protects them in indoor conditions, but is not sufficient for rain. 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 rubberized holders 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. Aesthetic mounting requires selecting the appropriate head size.

This model is characterized by dimensions Ø25x4 mm and a weight of 10.74 g. The pulling force of this model is an impressive 4.14 kg, which translates to 40.57 N in newtons. The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 13 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.

Pros as well as cons of rare earth magnets.

Strengths

In addition to their magnetic capacity, neodymium magnets provide the following advantages:

They do not lose magnetism, even after around ten years – the drop in lifting capacity is only ~1% (according to tests),
Neodymium magnets are characterized by highly resistant to loss of magnetic properties caused by magnetic disturbances,
A magnet with a shiny gold surface looks better,
Neodymium magnets achieve maximum magnetic induction on a small area, which increases force concentration,
Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
Possibility of exact forming and adapting to defined requirements,
Universal use in modern technologies – they are commonly used in magnetic memories, electric motors, medical equipment, also modern systems.
Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Disadvantages

Problematic aspects of neodymium magnets: tips and applications.

Brittleness is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a special holder, which not only secures them against impacts but also increases their durability
Neodymium magnets decrease 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 stability even at temperatures up to 230°C
Magnets exposed to a humid environment can rust. Therefore while using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
Due to limitations in creating nuts and complicated forms in magnets, we propose using cover - magnetic mount.
Health risk resulting from small fragments of magnets are risky, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, small elements of these products are able to disrupt the diagnostic process medical in case of swallowing.
Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Pull force analysis

Detachment force of the magnet in optimal conditions – what contributes to it?

Information about lifting capacity was determined for ideal contact conditions, assuming:

using a sheet made of low-carbon steel, acting as a ideal flux conductor
with a cross-section no less than 10 mm
with a plane perfectly flat
with direct contact (without paint)
during pulling in a direction perpendicular to the mounting surface
at conditions approx. 20°C

Key elements affecting lifting force

In real-world applications, the real power depends on a number of factors, listed from most significant:

Space between magnet and steel – every millimeter of separation (caused e.g. by veneer or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
Loading method – catalog parameter refers to pulling vertically. When applying parallel force, the magnet holds much less (typically approx. 20-30% of maximum force).
Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
Steel grade – the best choice is high-permeability steel. Stainless steels may have worse magnetic properties.
Surface condition – smooth surfaces guarantee perfect abutment, which increases field saturation. Rough surfaces weaken the grip.
Operating temperature – NdFeB sinters have a sensitivity to temperature. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).

Holding force was checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under attempts to slide the magnet the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate reduces the lifting capacity.

H&S for magnets

Risk of cracking

Despite metallic appearance, the material is brittle and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Powerful field

Before starting, read the rules. Sudden snapping can break the magnet or injure your hand. Think ahead.

Physical harm

Mind your fingers. Two large magnets will snap together immediately with a force of massive weight, crushing anything in their path. Be careful!

Protect data

Powerful magnetic fields can corrupt files on payment cards, hard drives, and other magnetic media. Keep a distance of at least 10 cm.

Demagnetization risk

Avoid heat. NdFeB magnets are sensitive to temperature. If you need resistance above 80°C, inquire about special high-temperature series (H, SH, UH).

Health Danger

Warning for patients: Strong magnetic fields affect electronics. Maintain at least 30 cm distance or ask another person to work with the magnets.

Swallowing risk

Strictly keep magnets away from children. Risk of swallowing is high, and the effects of magnets connecting inside the body are life-threatening.

Do not drill into magnets

Machining of NdFeB material carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is hard to extinguish.

GPS Danger

GPS units and smartphones are extremely susceptible to magnetic fields. Direct contact with a powerful NdFeB magnet can ruin the sensors in your phone.

Warning for allergy sufferers

Nickel alert: The nickel-copper-nickel coating consists of nickel. If an allergic reaction happens, immediately stop working with magnets and use protective gear.

Safety First! Want to know more? Read our article: Why are neodymium magnets dangerous?

MP 25x13x4 / N38 - ring magnet

Technical data - MP 25x13x4 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical analysis of the magnet - technical parameters

Table 1: Static force (pull vs gap) - interaction chart MP 25x13x4 / N38

Table 2: Slippage load (vertical surface) MP 25x13x4 / N38

Table 3: Vertical assembly (shearing) - vertical pull MP 25x13x4 / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection MP 25x13x4 / N38

Table 5: Thermal resistance (material behavior) - thermal limit MP 25x13x4 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system MP 25x13x4 / N38

Table 7: Hazards (implants) - precautionary measures MP 25x13x4 / N38

Table 8: Impact energy (kinetic energy) - warning MP 25x13x4 / N38

Table 9: Anti-corrosion coating durability MP 25x13x4 / N38

Table 10: Electrical data (Pc) MP 25x13x4 / N38

Table 11: Underwater work (magnet fishing) MP 25x13x4 / N38

1. Vertical hold

2. Steel thickness impact

3. Thermal stability

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

Elemental analysis

Environmental data

Magnet pull force

Magnetic Induction

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UMC 48x11/7x11.5 / N38 - cylindrical magnetic holder

Pros as well as cons of rare earth magnets.

Strengths

Disadvantages

Pull force analysis

Detachment force of the magnet in optimal conditions – what contributes to it?

Key elements affecting lifting force

H&S for magnets

Risk of cracking

Powerful field

Physical harm

Protect data

Demagnetization risk

Health Danger

Swallowing risk

Do not drill into magnets

GPS Danger

Warning for allergy sufferers

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs gap) - interaction chart
MP 25x13x4 / N38

Table 2: Slippage load (vertical surface)
MP 25x13x4 / N38

Table 3: Vertical assembly (shearing) - vertical pull
MP 25x13x4 / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection
MP 25x13x4 / N38

Table 5: Thermal resistance (material behavior) - thermal limit
MP 25x13x4 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MP 25x13x4 / N38

Table 7: Hazards (implants) - precautionary measures
MP 25x13x4 / N38

Table 8: Impact energy (kinetic energy) - warning
MP 25x13x4 / N38

Table 9: Anti-corrosion coating durability
MP 25x13x4 / N38

Table 10: Electrical data (P_c)
MP 25x13x4 / N38

Table 11: Underwater work (magnet fishing)
MP 25x13x4 / N38