Product on order Ships in 3-5 days

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: 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

product specifications »

6.77 ZŁ with VAT / pcs + price for transport

5.50 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

5.50 ZŁ

6.77 ZŁ

price from 150 pcs

5.17 ZŁ

6.36 ZŁ

price from 500 pcs

4.84 ZŁ

5.95 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Hunting for a discount?

Call us now +48 22 499 98 98 or send us a note via request form the contact page.
Strength as well as form of a magnet can be checked on our force calculator.

Order by 14:00 and we’ll ship today!

Physical properties - 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 simulation of the assembly - data

These data represent the outcome of a physical analysis. Results are based on models for the class Nd₂Fe₁₄B. Actual conditions might slightly differ. Use these data as a reference point for designers.

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

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

Pulling power decreases drastically with every mm of distance. Note that even the smallest gap (e.g., dirt, paint, veneer) strongly reduces the pull force. Magnets work strongest at the point of direct contact; gap drastically cuts the force. Observe how rapidly the load capacity drop, when the product does not adhere flatly to the steel surface. When designing the mounting, discard redundant distances.

Table 2: Shear hold (wall)
MP 25x13x4 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	0.83 kg / 828.0 g 8.1 N
1 mm	Stal (~0.2)	0.70 kg / 700.0 g 6.9 N
2 mm	Stal (~0.2)	0.58 kg / 582.0 g 5.7 N
3 mm	Stal (~0.2)	0.48 kg / 480.0 g 4.7 N
5 mm	Stal (~0.2)	0.32 kg / 318.0 g 3.1 N
10 mm	Stal (~0.2)	0.11 kg / 106.0 g 1.0 N
15 mm	Stal (~0.2)	0.04 kg / 38.0 g 0.4 N
20 mm	Stal (~0.2)	0.01 kg / 14.0 g 0.1 N
30 mm	Stal (~0.2)	0.00 kg / 4.0 g 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N

This section defines the estimated shear load needed to initiate the shifting of the magnet down against a vertical metal surface (considering typical friction). This parameter depends on the air gap between the magnet and the metal.

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

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

When hanging a element on a upright wall (e.g., a board), it will maintain barely about 20%-30% of nominal attraction strength. Gravity as well as a low friction coefficient cause that magnets slip faster than they detach. Planning a vertical fastening? Consider that the sliding force is noticeably lower than the maximum static pull force. On a smooth steel, the holder will slip down under a significantly smaller load. Application of an anti-slip pad can effectively improve the result.

Table 4: Steel thickness (saturation) - power losses
MP 25x13x4 / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	10%	0.41 kg / 414.0 g 4.1 N
1 mm	25%	1.04 kg / 1035.0 g 10.2 N
2 mm	50%	2.07 kg / 2070.0 g 20.3 N
5 mm	100%	4.14 kg / 4140.0 g 40.6 N
10 mm	100%	4.14 kg / 4140.0 g 40.6 N

A thin metal plate cannot absorb the full magnetic flux, which squanders power of the magnet. Should you install a neodymium to a weak sheet, the magnetism will penetrate right through and the holding will be smaller. To utilize full efficiency of this magnet's power, you require a sufficiently solid element of metal. The saturation phenomenon causes that on thin elements (e.g., thin profiles), the holder holds weaker. We advise picking the steel cross-section based on the following data.

Table 5: Working in heat (material behavior) - resistance threshold
MP 25x13x4 / N38

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

Classic neodymiums lose strength past the thermal threshold. Protect against heat – excessive heat can permanently demagnetize this magnet. With every degree above norm, the neodymium's force briefly drops. Refrain from using this product near heat sources higher than its safe range. Too high temperature will lead to irreversible degradation of magnetism.

*Technical advisory: Temperature resistance depends not only on the material grade, as well as the dimension ratios. Flat magnets (pancake types) are more susceptible to demagnetization at lower temperatures than taller cylinders. Warning indicator in the table points to permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - field collision
MP 25x13x4 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	83.66 kg / 83661 g 820.7 N 6 082 Gs	N/A
1 mm	77.09 kg / 77087 g 756.2 N 11 091 Gs	69.38 kg / 69378 g 680.6 N ~0 Gs
2 mm	70.68 kg / 70675 g 693.3 N 10 620 Gs	63.61 kg / 63608 g 624.0 N ~0 Gs
3 mm	64.59 kg / 64591 g 633.6 N 10 153 Gs	58.13 kg / 58131 g 570.3 N ~0 Gs
5 mm	53.48 kg / 53478 g 524.6 N 9 238 Gs	48.13 kg / 48130 g 472.2 N ~0 Gs
10 mm	32.05 kg / 32053 g 314.4 N 7 152 Gs	28.85 kg / 28848 g 283.0 N ~0 Gs
20 mm	10.77 kg / 10768 g 105.6 N 4 145 Gs	9.69 kg / 9691 g 95.1 N ~0 Gs
50 mm	0.66 kg / 657 g 6.4 N 1 024 Gs	0.59 kg / 592 g 5.8 N ~0 Gs

Two magnetic products interact from a much further distance than a magnet and steel combination. Such a system of magnet-to-magnet creates a more powerful interaction and a larger range of performance. Want to build a powerful holder? Utilize two neodymiums instead of one magnet and a steel. Remember that when attracting two neodymiums, the impact force is massive. The levitation is marginally weaker than the attraction, but still large.
*Field value in repulsion mode reaches ~0 Gs in the exact middle of the gap (due to field cancellation).

Table 7: Hazards (implants) - warnings
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
Car key	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 electronics as well as medical implants. These NdFeB products generate a field that prevents correct functioning of digital equipment. Be aware: the unseen radiation passes through tissues and plastic. Special caution must be taken by people with cochlear implants and drug dispensers. Also at risk are: mechanical watches, car keys, membranes, and displays. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Impact energy (kinetic energy) - collision effects
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

NdFeB products are delicate – a collision with steel risks their cracking. Watch the impact speed – a magnet released freely speeds with massive force. Striking energy 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 steel surface. A collision at high speed almost guarantees destruction of the magnet. Wear safety glasses when handling with powerful specimens.

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. Note the thickness of the protective layer.

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 passing through the pole surface. Key data in coil applications and motors. The P_c coefficient determines the magnet's operating point.

Table 11: Physics of underwater searching
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%

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

Contrary to myths, water does not block the magnetic field. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Vertical hold

*Note: On a vertical wall, the magnet retains just approx. 20-30% of its nominal pull.

2. Efficiency vs thickness

*Thin steel (e.g. computer case) significantly weakens the holding force.

3. Thermal stability

*For N38 material, 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.

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%

Ecology and recycling (GPSR)

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: 030190-2025

Magnet Unit Converter

Magnet pull force

Kilograms (kg)

Newtons (N)

Pounds (lbs)

Field Strength

Gauss (Gs)

Tesla (T)

Enter data in any box, and the rest convert instantly.

Other products

Product on order Ships in 3-5 days

MPL 25x15x2 / N38 - lamellar magnet

2.39 ZŁ brutto / pcs

Product on order Ships in 3-5 days

UMC 60x9/5x15 / N38 - cylindrical magnetic holder

64.94 ZŁ brutto / pcs

Product on order Ships in 3-5 days

RM R8 ULTRA - 13000 Gs / N52 - magnetic distributor

200.00 ZŁ brutto / pcs

Product on order Ships in 3-5 days

SM 25x300 [2xM8] / N52 - magnetic separator

910.20 ZŁ brutto / pcs

The ring magnet with a hole MP 25x13x4 / N38 is created for mechanical fastening, where glue might fail or be insufficient. Thanks to the hole (often for a screw), this model enables easy screwing to wood, wall, plastic, or metal. This product with a force of 4.14 kg works great as a cabinet closure, speaker holder, or mounting element in devices.

This material behaves more like porcelain than steel, so it doesn't forgive mistakes during mounting. When tightening the screw, you must maintain caution. We recommend tightening manually with a screwdriver, not an impact driver, because excessive force 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.

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 indoor use. For outdoor applications, we recommend choosing rubberized holders or additional protection with varnish.

A screw or bolt with a thread diameter smaller than 13 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. Aesthetic mounting requires selecting the appropriate head size.

The presented product is a ring magnet with dimensions Ø25 mm (outer diameter) and height 4 mm. 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.

Advantages as well as disadvantages of neodymium magnets.

Advantages

Apart from their consistent holding force, neodymium magnets have these key benefits:

They retain magnetic properties for almost ten years – the drop is just ~1% (according to analyses),
They maintain their magnetic properties even under close interference source,
In other words, due to the metallic layer of gold, the element becomes visually attractive,
Magnets are characterized by excellent magnetic induction on the active area,
Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
Thanks to modularity in designing and the capacity to adapt to client solutions,
Huge importance in electronics industry – they find application in computer drives, drive modules, diagnostic systems, also technologically advanced constructions.
Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Cons

Disadvantages of neodymium magnets:

At very strong impacts they can crack, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
They rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
We recommend casing - magnetic mount, due to difficulties in creating nuts inside the magnet and complex shapes.
Health risk related to microscopic parts of magnets pose a threat, in case of ingestion, which becomes key in the context of child health protection. Additionally, tiny parts of these products are able to be problematic in diagnostics medical after entering the body.
High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities

Pull force analysis

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

Breakaway force was determined for ideal contact conditions, taking into account:

on a block made of mild steel, perfectly concentrating the magnetic flux
with a thickness of at least 10 mm
with a surface free of scratches
without the slightest clearance between the magnet and steel
under axial force direction (90-degree angle)
in temp. approx. 20°C

Practical aspects of lifting capacity – factors

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 distance (caused e.g. by varnish or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
Direction of force – highest force is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is typically many times smaller (approx. 1/5 of the lifting capacity).
Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
Steel type – low-carbon steel gives the best results. Alloy admixtures lower magnetic permeability and holding force.
Surface finish – full contact is obtained only on polished steel. Rough texture create air cushions, reducing force.
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).

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, however under shearing force the load capacity is reduced by as much as 75%. In addition, even a slight gap between the magnet and the plate decreases the lifting capacity.

Safety rules for work with neodymium magnets

Choking Hazard

Only for adults. Tiny parts can be swallowed, leading to severe trauma. Keep away from kids and pets.

Warning for allergy sufferers

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If an allergic reaction occurs, cease working with magnets and wear gloves.

Heat sensitivity

Keep cool. NdFeB magnets are susceptible to heat. If you need operation above 80°C, ask us about special high-temperature series (H, SH, UH).

Risk of cracking

NdFeB magnets are sintered ceramics, which means they are very brittle. Clashing of two magnets leads to them shattering into shards.

Keep away from electronics

Navigation devices and smartphones are highly sensitive to magnetism. Close proximity with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

Keep away from computers

Avoid bringing magnets close to a wallet, laptop, or TV. The magnetism can permanently damage these devices and erase data from cards.

Physical harm

Danger of trauma: The attraction force is so great that it can cause hematomas, crushing, and even bone fractures. Protective gloves are recommended.

Medical interference

Patients with a heart stimulator should maintain an absolute distance from magnets. The magnetism can interfere with the functioning of the life-saving device.

Do not underestimate power

Handle magnets with awareness. Their immense force can surprise even experienced users. Stay alert and do not underestimate their force.

Fire warning

Dust generated during grinding of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.

Attention! Need more info? Read our article: Are neodymium magnets dangerous?

MP 25x13x4 / N38 - ring magnet

Physical properties - MP 25x13x4 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical simulation of the assembly - data

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

Table 2: Shear hold (wall) MP 25x13x4 / N38

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

Table 4: Steel thickness (saturation) - power losses MP 25x13x4 / N38

Table 5: Working in heat (material behavior) - resistance threshold MP 25x13x4 / N38

Table 6: Magnet-Magnet interaction (attraction) - field collision MP 25x13x4 / N38

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

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

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

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

Table 11: Physics of underwater searching MP 25x13x4 / N38

1. Vertical hold

2. Efficiency vs thickness

3. Thermal stability

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

Material specification

Ecology and recycling (GPSR)

Magnet pull force

Field Strength

Other products

MPL 25x15x2 / N38 - lamellar magnet

UMC 60x9/5x15 / N38 - cylindrical magnetic holder

RM R8 ULTRA - 13000 Gs / N52 - magnetic distributor

SM 25x300 [2xM8] / N52 - magnetic separator

Advantages as well as disadvantages of neodymium magnets.

Advantages

Cons

Pull force analysis

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

Practical aspects of lifting capacity – factors

Safety rules for work with neodymium magnets

Choking Hazard

Warning for allergy sufferers

Heat sensitivity

Risk of cracking

Keep away from electronics

Keep away from computers

Physical harm

Medical interference

Do not underestimate power

Fire warning

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

Table 2: Shear hold (wall)
MP 25x13x4 / N38

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

Table 4: Steel thickness (saturation) - power losses
MP 25x13x4 / N38

Table 5: Working in heat (material behavior) - resistance threshold
MP 25x13x4 / N38

Table 6: Magnet-Magnet interaction (attraction) - field collision
MP 25x13x4 / N38

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

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

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

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

Table 11: Physics of underwater searching
MP 25x13x4 / N38