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Magnets for underwater searches

Start your adventure with treasure salvaging! Our double-handle grips (F200, F400) provide grip certainty and huge lifting capacity. Stainless steel construction and reinforced ropes will perform in rivers and lakes.

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MPL 60x10x5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020474

GTIN/EAN: 5906301811947

5.00

length

60 mm [±0,1 mm]

Width

10 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

22.5 g

Magnetization Direction

↑ axial

Load capacity

18.16 kg / 178.10 N

Magnetic Induction

315.09 mT / 3151 Gs

Coating

[NiCuNi] Nickel

19.00 with VAT / pcs + price for transport

15.45 ZŁ net + 23% VAT / pcs

bulk discounts:

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Technical - MPL 60x10x5 / N38 - lamellar magnet

Specification / characteristics - MPL 60x10x5 / N38 - lamellar magnet

properties
properties values
Cat. no. 020474
GTIN/EAN 5906301811947
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
length 60 mm [±0,1 mm]
Width 10 mm [±0,1 mm]
Height 5 mm [±0,1 mm]
Weight 22.5 g
Magnetization Direction ↑ axial
Load capacity ~ ? 18.16 kg / 178.10 N
Magnetic Induction ~ ? 315.09 mT / 3151 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 60x10x5 / N38 - lamellar 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

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 assembly - technical parameters

These data are the result of a physical calculation. Results are based on algorithms for the material Nd2Fe14B. Operational performance might slightly deviate from the simulation results. Use these data as a preliminary roadmap when designing systems.

Table 1: Static force (force vs gap) - interaction chart
MPL 60x10x5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3149 Gs
314.9 mT
18.16 kg / 40.04 lbs
18160.0 g / 178.1 N
critical level
1 mm 2731 Gs
273.1 mT
13.66 kg / 30.11 lbs
13658.3 g / 134.0 N
critical level
2 mm 2302 Gs
230.2 mT
9.70 kg / 21.38 lbs
9698.4 g / 95.1 N
strong
3 mm 1912 Gs
191.2 mT
6.70 kg / 14.76 lbs
6696.5 g / 65.7 N
strong
5 mm 1317 Gs
131.7 mT
3.18 kg / 7.00 lbs
3176.9 g / 31.2 N
strong
10 mm 598 Gs
59.8 mT
0.65 kg / 1.44 lbs
653.8 g / 6.4 N
weak grip
15 mm 330 Gs
33.0 mT
0.20 kg / 0.44 lbs
199.2 g / 2.0 N
weak grip
20 mm 205 Gs
20.5 mT
0.08 kg / 0.17 lbs
77.0 g / 0.8 N
weak grip
30 mm 96 Gs
9.6 mT
0.02 kg / 0.04 lbs
16.9 g / 0.2 N
weak grip
50 mm 31 Gs
3.1 mT
0.00 kg / 0.00 lbs
1.8 g / 0.0 N
weak grip

Table 2: Vertical hold (vertical surface)
MPL 60x10x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 3.63 kg / 8.01 lbs
3632.0 g / 35.6 N
1 mm Stal (~0.2) 2.73 kg / 6.02 lbs
2732.0 g / 26.8 N
2 mm Stal (~0.2) 1.94 kg / 4.28 lbs
1940.0 g / 19.0 N
3 mm Stal (~0.2) 1.34 kg / 2.95 lbs
1340.0 g / 13.1 N
5 mm Stal (~0.2) 0.64 kg / 1.40 lbs
636.0 g / 6.2 N
10 mm Stal (~0.2) 0.13 kg / 0.29 lbs
130.0 g / 1.3 N
15 mm Stal (~0.2) 0.04 kg / 0.09 lbs
40.0 g / 0.4 N
20 mm Stal (~0.2) 0.02 kg / 0.04 lbs
16.0 g / 0.2 N
30 mm Stal (~0.2) 0.00 kg / 0.01 lbs
4.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N

Table 3: Vertical assembly (sliding) - vertical pull
MPL 60x10x5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
5.45 kg / 12.01 lbs
5448.0 g / 53.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
3.63 kg / 8.01 lbs
3632.0 g / 35.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.82 kg / 4.00 lbs
1816.0 g / 17.8 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
9.08 kg / 20.02 lbs
9080.0 g / 89.1 N

Table 4: Steel thickness (substrate influence) - power losses
MPL 60x10x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
0.91 kg / 2.00 lbs
908.0 g / 8.9 N
1 mm
13%
2.27 kg / 5.00 lbs
2270.0 g / 22.3 N
2 mm
25%
4.54 kg / 10.01 lbs
4540.0 g / 44.5 N
3 mm
38%
6.81 kg / 15.01 lbs
6810.0 g / 66.8 N
5 mm
63%
11.35 kg / 25.02 lbs
11350.0 g / 111.3 N
10 mm
100%
18.16 kg / 40.04 lbs
18160.0 g / 178.1 N
11 mm
100%
18.16 kg / 40.04 lbs
18160.0 g / 178.1 N
12 mm
100%
18.16 kg / 40.04 lbs
18160.0 g / 178.1 N

Table 5: Working in heat (material behavior) - thermal limit
MPL 60x10x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 18.16 kg / 40.04 lbs
18160.0 g / 178.1 N
OK
40 °C -2.2% 17.76 kg / 39.16 lbs
17760.5 g / 174.2 N
OK
60 °C -4.4% 17.36 kg / 38.27 lbs
17361.0 g / 170.3 N
80 °C -6.6% 16.96 kg / 37.39 lbs
16961.4 g / 166.4 N
100 °C -28.8% 12.93 kg / 28.51 lbs
12929.9 g / 126.8 N

Table 6: Magnet-Magnet interaction (repulsion) - field range
MPL 60x10x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 36.69 kg / 80.89 lbs
4 464 Gs
5.50 kg / 12.13 lbs
5503 g / 54.0 N
N/A
1 mm 32.13 kg / 70.84 lbs
5 895 Gs
4.82 kg / 10.63 lbs
4820 g / 47.3 N
28.92 kg / 63.76 lbs
~0 Gs
2 mm 27.59 kg / 60.83 lbs
5 463 Gs
4.14 kg / 9.13 lbs
4139 g / 40.6 N
24.83 kg / 54.75 lbs
~0 Gs
3 mm 23.37 kg / 51.53 lbs
5 027 Gs
3.51 kg / 7.73 lbs
3506 g / 34.4 N
21.03 kg / 46.37 lbs
~0 Gs
5 mm 16.31 kg / 35.97 lbs
4 200 Gs
2.45 kg / 5.39 lbs
2447 g / 24.0 N
14.68 kg / 32.37 lbs
~0 Gs
10 mm 6.42 kg / 14.15 lbs
2 635 Gs
0.96 kg / 2.12 lbs
963 g / 9.4 N
5.78 kg / 12.74 lbs
~0 Gs
20 mm 1.32 kg / 2.91 lbs
1 195 Gs
0.20 kg / 0.44 lbs
198 g / 1.9 N
1.19 kg / 2.62 lbs
~0 Gs
50 mm 0.07 kg / 0.15 lbs
274 Gs
0.01 kg / 0.02 lbs
10 g / 0.1 N
0.06 kg / 0.14 lbs
~0 Gs
60 mm 0.03 kg / 0.08 lbs
192 Gs
0.01 kg / 0.01 lbs
5 g / 0.1 N
0.03 kg / 0.07 lbs
~0 Gs
70 mm 0.02 kg / 0.04 lbs
140 Gs
0.00 kg / 0.01 lbs
3 g / 0.0 N
0.02 kg / 0.04 lbs
~0 Gs
80 mm 0.01 kg / 0.02 lbs
104 Gs
0.00 kg / 0.00 lbs
2 g / 0.0 N
0.01 kg / 0.02 lbs
~0 Gs
90 mm 0.01 kg / 0.01 lbs
80 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
100 mm 0.00 kg / 0.01 lbs
62 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Hazards (electronics) - warnings
MPL 60x10x5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 10.5 cm
Hearing aid 10 Gs (1.0 mT) 8.0 cm
Timepiece 20 Gs (2.0 mT) 6.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 4.5 cm
Car key 50 Gs (5.0 mT) 4.5 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Dynamics (cracking risk) - collision effects
MPL 60x10x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 29.29 km/h
(8.14 m/s)
0.74 J
30 mm 49.65 km/h
(13.79 m/s)
2.14 J
50 mm 64.07 km/h
(17.80 m/s)
3.56 J
100 mm 90.60 km/h
(25.17 m/s)
7.13 J

Table 9: Anti-corrosion coating durability
MPL 60x10x5 / 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)

Table 10: Electrical data (Pc)
MPL 60x10x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 14 969 Mx 149.7 µWb
Pc Coefficient 0.26 Low (Flat)

Table 11: Physics of underwater searching
MPL 60x10x5 / N38

Environment Effective steel pull Effect
Air (land) 18.16 kg Standard
Water (riverbed) 20.79 kg
(+2.63 kg buoyancy gain)
+14.5%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Wall mount (shear)

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

2. Steel thickness impact

*Thin steel (e.g. 0.5mm PC case) drastically reduces the holding force.

3. Temperature resistance

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.26

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 Pc (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 Pc 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
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: 020474-2026
Magnet Unit Converter
Magnet pull force

Magnetic Induction

See also deals

This product is a very powerful plate magnet made of NdFeB material, which, with dimensions of 60x10x5 mm and a weight of 22.5 g, guarantees the highest quality connection. This rectangular block with a force of 178.10 N is ready for shipment in 24h, allowing for rapid realization of your project. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.
The key to success is shifting the magnets along their largest connection plane (using e.g., the edge of a table), which is easier than trying to tear them apart directly. Watch your fingers! Magnets with a force of 18.16 kg can pinch very hard and cause hematomas. Never use metal tools for prying, as the brittle NdFeB material may chip and damage your eyes.
They constitute a key element in the production of wind generators and material handling systems. Thanks to the flat surface and high force (approx. 18.16 kg), they are ideal as closers in furniture making and mounting elements in automation. Customers often choose this model for hanging tools on strips and for advanced DIY and modeling projects, where precision and power count.
For mounting flat magnets MPL 60x10x5 / N38, it is best to use strong epoxy glues (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. For lighter applications or mounting on smooth surfaces, branded foam tape (e.g., 3M VHB) will work, provided the surface is perfectly degreased. Remember to clean and degrease the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.
Standardly, the MPL 60x10x5 / N38 model is magnetized through the thickness (dimension 5 mm), which means that the N and S poles are located on its largest, flat surfaces. Thanks to this, it works best when "sticking" to sheet metal or another magnet with a large surface area. This is the most popular configuration for block magnets used in separators and holders.
This model is characterized by dimensions 60x10x5 mm, which, at a weight of 22.5 g, makes it an element with impressive energy density. The key parameter here is the holding force amounting to approximately 18.16 kg (force ~178.10 N), which, with such a flat shape, proves the high grade of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Strengths and weaknesses of Nd2Fe14B magnets.

Advantages

Besides their immense field intensity, neodymium magnets offer the following advantages:
  • They do not lose magnetism, even during nearly 10 years – the reduction in power is only ~1% (based on measurements),
  • They feature excellent resistance to weakening of magnetic properties as a result of external magnetic sources,
  • In other words, due to the aesthetic finish of nickel, the element becomes visually attractive,
  • The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
  • 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...
  • Considering the ability of flexible shaping and customization to specialized projects, magnetic components can be modeled in a broad palette of geometric configurations, which amplifies use scope,
  • Versatile presence in electronics industry – they are commonly used in computer drives, electromotive mechanisms, diagnostic systems, also other advanced devices.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages

What to avoid - cons of neodymium magnets and ways of using them
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a special holder, which not only secures them against impacts but also increases their durability
  • We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation and corrosion.
  • We suggest cover - magnetic holder, due to difficulties in realizing threads inside the magnet and complicated forms.
  • Health risk related to microscopic parts of magnets pose a threat, if swallowed, which gains importance in the context of child safety. It is also worth noting that small components of these magnets can complicate diagnosis medical after entering the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Breakaway strength of the magnet in ideal conditionswhat affects it?

Information about lifting capacity was determined for the most favorable conditions, taking into account:
  • with the contact of a yoke made of low-carbon steel, guaranteeing maximum field concentration
  • with a thickness of at least 10 mm
  • with an ground touching surface
  • with direct contact (no impurities)
  • for force applied at a right angle (in the magnet axis)
  • at standard ambient temperature

Key elements affecting lifting force

It is worth knowing that the working load will differ depending on the following factors, in order of importance:
  • Gap between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Direction of force – highest force is obtained only during perpendicular pulling. The shear force of the magnet along the plate is typically many times lower (approx. 1/5 of the lifting capacity).
  • Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Steel type – mild steel attracts best. Alloy steels decrease magnetic properties and lifting capacity.
  • Surface structure – the more even the plate, the larger the contact zone and stronger the hold. Roughness creates an air distance.
  • Thermal factor – hot environment weakens magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity was assessed using a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under parallel forces the holding force is lower. Additionally, even a slight gap between the magnet and the plate decreases the holding force.

Warnings
Warning for allergy sufferers

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If skin irritation appears, cease working with magnets and wear gloves.

Flammability

Mechanical processing of neodymium magnets carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Serious injuries

Mind your fingers. Two powerful magnets will join immediately with a force of massive weight, destroying anything in their path. Be careful!

Risk of cracking

Despite metallic appearance, neodymium is delicate and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

This is not a toy

Only for adults. Tiny parts can be swallowed, leading to serious injuries. Keep out of reach of kids and pets.

Precision electronics

Remember: neodymium magnets produce a field that interferes with sensitive sensors. Keep a separation from your mobile, tablet, and GPS.

Safe distance

Intense magnetic fields can destroy records on payment cards, HDDs, and other magnetic media. Keep a distance of min. 10 cm.

Implant safety

For implant holders: Strong magnetic fields disrupt medical devices. Maintain at least 30 cm distance or ask another person to handle the magnets.

Operating temperature

Monitor thermal conditions. Exposing the magnet to high heat will permanently weaken its properties and pulling force.

Respect the power

Use magnets with awareness. Their huge power can shock even experienced users. Stay alert and respect their power.

Safety First! Need more info? Check our post: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98