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MP 60x20x5 / N38 - ring magnet

ring magnet

Catalog no 030204

GTIN/EAN: 5906301812210

5.00

Diameter

60 mm [±0,1 mm]

internal diameter Ø

20 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

94.25 g

Magnetization Direction

↑ axial

Load capacity

9.41 kg / 92.27 N

Magnetic Induction

101.92 mT / 1019 Gs

Coating

[NiCuNi] Nickel

47.99 with VAT / pcs + price for transport

39.02 ZŁ net + 23% VAT / pcs

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Technical details - MP 60x20x5 / N38 - ring magnet

Specification / characteristics - MP 60x20x5 / N38 - ring magnet

properties
properties values
Cat. no. 030204
GTIN/EAN 5906301812210
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 60 mm [±0,1 mm]
internal diameter Ø 20 mm [±0,1 mm]
Height 5 mm [±0,1 mm]
Weight 94.25 g
Magnetization Direction ↑ axial
Load capacity ~ ? 9.41 kg / 92.27 N
Magnetic Induction ~ ? 101.92 mT / 1019 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 60x20x5 / 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

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

Presented information represent the direct effect of a mathematical analysis. Results rely on models for the material Nd2Fe14B. Real-world conditions might slightly deviate from the simulation results. Treat these data as a supplementary guide during assembly planning.

Table 1: Static force (pull vs distance) - power drop
MP 60x20x5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4541 Gs
454.1 mT
9.41 kg / 20.75 lbs
9410.0 g / 92.3 N
medium risk
1 mm 4400 Gs
440.0 mT
8.83 kg / 19.47 lbs
8832.4 g / 86.6 N
medium risk
2 mm 4254 Gs
425.4 mT
8.26 kg / 18.21 lbs
8258.2 g / 81.0 N
medium risk
3 mm 4107 Gs
410.7 mT
7.70 kg / 16.97 lbs
7697.5 g / 75.5 N
medium risk
5 mm 3812 Gs
381.2 mT
6.63 kg / 14.62 lbs
6630.0 g / 65.0 N
medium risk
10 mm 3097 Gs
309.7 mT
4.38 kg / 9.65 lbs
4375.1 g / 42.9 N
medium risk
15 mm 2463 Gs
246.3 mT
2.77 kg / 6.10 lbs
2767.8 g / 27.2 N
medium risk
20 mm 1939 Gs
193.9 mT
1.72 kg / 3.78 lbs
1715.2 g / 16.8 N
low risk
30 mm 1202 Gs
120.2 mT
0.66 kg / 1.45 lbs
659.2 g / 6.5 N
low risk
50 mm 509 Gs
50.9 mT
0.12 kg / 0.26 lbs
118.0 g / 1.2 N
low risk

Table 2: Vertical capacity (vertical surface)
MP 60x20x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 1.88 kg / 4.15 lbs
1882.0 g / 18.5 N
1 mm Stal (~0.2) 1.77 kg / 3.89 lbs
1766.0 g / 17.3 N
2 mm Stal (~0.2) 1.65 kg / 3.64 lbs
1652.0 g / 16.2 N
3 mm Stal (~0.2) 1.54 kg / 3.40 lbs
1540.0 g / 15.1 N
5 mm Stal (~0.2) 1.33 kg / 2.92 lbs
1326.0 g / 13.0 N
10 mm Stal (~0.2) 0.88 kg / 1.93 lbs
876.0 g / 8.6 N
15 mm Stal (~0.2) 0.55 kg / 1.22 lbs
554.0 g / 5.4 N
20 mm Stal (~0.2) 0.34 kg / 0.76 lbs
344.0 g / 3.4 N
30 mm Stal (~0.2) 0.13 kg / 0.29 lbs
132.0 g / 1.3 N
50 mm Stal (~0.2) 0.02 kg / 0.05 lbs
24.0 g / 0.2 N

Table 3: Vertical assembly (sliding) - vertical pull
MP 60x20x5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
2.82 kg / 6.22 lbs
2823.0 g / 27.7 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.88 kg / 4.15 lbs
1882.0 g / 18.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.94 kg / 2.07 lbs
941.0 g / 9.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
4.71 kg / 10.37 lbs
4705.0 g / 46.2 N

Table 4: Steel thickness (substrate influence) - power losses
MP 60x20x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.94 kg / 2.07 lbs
941.0 g / 9.2 N
1 mm
25%
2.35 kg / 5.19 lbs
2352.5 g / 23.1 N
2 mm
50%
4.71 kg / 10.37 lbs
4705.0 g / 46.2 N
3 mm
75%
7.06 kg / 15.56 lbs
7057.5 g / 69.2 N
5 mm
100%
9.41 kg / 20.75 lbs
9410.0 g / 92.3 N
10 mm
100%
9.41 kg / 20.75 lbs
9410.0 g / 92.3 N
11 mm
100%
9.41 kg / 20.75 lbs
9410.0 g / 92.3 N
12 mm
100%
9.41 kg / 20.75 lbs
9410.0 g / 92.3 N

Table 5: Thermal resistance (material behavior) - power drop
MP 60x20x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 9.41 kg / 20.75 lbs
9410.0 g / 92.3 N
OK
40 °C -2.2% 9.20 kg / 20.29 lbs
9203.0 g / 90.3 N
OK
60 °C -4.4% 9.00 kg / 19.83 lbs
8996.0 g / 88.3 N
OK
80 °C -6.6% 8.79 kg / 19.38 lbs
8788.9 g / 86.2 N
100 °C -28.8% 6.70 kg / 14.77 lbs
6699.9 g / 65.7 N

Table 6: Two magnets (attraction) - field collision
MP 60x20x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 303.46 kg / 669.01 lbs
5 621 Gs
45.52 kg / 100.35 lbs
45519 g / 446.5 N
N/A
1 mm 294.21 kg / 648.62 lbs
8 943 Gs
44.13 kg / 97.29 lbs
44132 g / 432.9 N
264.79 kg / 583.76 lbs
~0 Gs
2 mm 284.83 kg / 627.94 lbs
8 800 Gs
42.72 kg / 94.19 lbs
42725 g / 419.1 N
256.35 kg / 565.15 lbs
~0 Gs
3 mm 275.53 kg / 607.43 lbs
8 655 Gs
41.33 kg / 91.11 lbs
41329 g / 405.4 N
247.97 kg / 546.69 lbs
~0 Gs
5 mm 257.21 kg / 567.06 lbs
8 362 Gs
38.58 kg / 85.06 lbs
38582 g / 378.5 N
231.49 kg / 510.35 lbs
~0 Gs
10 mm 213.81 kg / 471.36 lbs
7 624 Gs
32.07 kg / 70.70 lbs
32071 g / 314.6 N
192.43 kg / 424.23 lbs
~0 Gs
20 mm 141.09 kg / 311.05 lbs
6 193 Gs
21.16 kg / 46.66 lbs
21164 g / 207.6 N
126.98 kg / 279.95 lbs
~0 Gs
50 mm 34.15 kg / 75.30 lbs
3 047 Gs
5.12 kg / 11.29 lbs
5123 g / 50.3 N
30.74 kg / 67.77 lbs
~0 Gs
60 mm 21.26 kg / 46.87 lbs
2 404 Gs
3.19 kg / 7.03 lbs
3189 g / 31.3 N
19.13 kg / 42.18 lbs
~0 Gs
70 mm 13.43 kg / 29.61 lbs
1 911 Gs
2.01 kg / 4.44 lbs
2015 g / 19.8 N
12.09 kg / 26.65 lbs
~0 Gs
80 mm 8.65 kg / 19.06 lbs
1 533 Gs
1.30 kg / 2.86 lbs
1297 g / 12.7 N
7.78 kg / 17.16 lbs
~0 Gs
90 mm 5.68 kg / 12.52 lbs
1 243 Gs
0.85 kg / 1.88 lbs
852 g / 8.4 N
5.11 kg / 11.27 lbs
~0 Gs
100 mm 3.81 kg / 8.39 lbs
1 017 Gs
0.57 kg / 1.26 lbs
571 g / 5.6 N
3.43 kg / 7.55 lbs
~0 Gs

Table 7: Safety (HSE) (implants) - precautionary measures
MP 60x20x5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 31.5 cm
Hearing aid 10 Gs (1.0 mT) 24.5 cm
Timepiece 20 Gs (2.0 mT) 19.5 cm
Mobile device 40 Gs (4.0 mT) 15.0 cm
Car key 50 Gs (5.0 mT) 14.0 cm
Payment card 400 Gs (40.0 mT) 6.0 cm
HDD hard drive 600 Gs (60.0 mT) 5.0 cm

Table 8: Dynamics (cracking risk) - collision effects
MP 60x20x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 12.67 km/h
(3.52 m/s)
0.58 J
30 mm 18.20 km/h
(5.06 m/s)
1.20 J
50 mm 22.71 km/h
(6.31 m/s)
1.88 J
100 mm 31.88 km/h
(8.85 m/s)
3.70 J

Table 9: Anti-corrosion coating durability
MP 60x20x5 / 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)
MP 60x20x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 109 640 Mx 1096.4 µWb
Pc Coefficient 0.62 High (Stable)

Table 11: Hydrostatics and buoyancy
MP 60x20x5 / N38

Environment Effective steel pull Effect
Air (land) 9.41 kg Standard
Water (riverbed) 10.77 kg
(+1.36 kg buoyancy gain)
+14.5%
Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Wall mount (shear)

*Caution: On a vertical surface, the magnet retains only approx. 20-30% of its max power.

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) drastically weakens the holding force.

3. Power loss vs temp

*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) = 0.62

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 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
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%
Sustainability
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: 030204-2026
Magnet Unit Converter
Magnet pull force

Magnetic Field

Other offers

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 9.41 kg works great as a cabinet closure, speaker holder, or mounting element in devices.
This is a crucial issue when working with model MP 60x20x5 / 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. It's a good idea to use a rubber spacer under the screw head, which will cushion the stresses. 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 does not ensure full waterproofing. In the place of the mounting hole, the coating is thinner and easily scratched when tightening the screw, which will become a corrosion focus. If you must use it outside, paint it with anti-corrosion paint after mounting.
A screw or bolt with a thread diameter smaller than 20 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.
This model is characterized by dimensions Ø60x5 mm and a weight of 94.25 g. The pulling force of this model is an impressive 9.41 kg, which translates to 92.27 N in newtons. The mounting hole diameter is precisely 20 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 and cons of Nd2Fe14B magnets.

Pros

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They have stable power, and over more than 10 years their performance decreases symbolically – ~1% (in testing),
  • They possess excellent resistance to weakening of magnetic properties due to external magnetic sources,
  • Thanks to the shiny finish, the plating of nickel, gold, or silver gives an professional appearance,
  • Magnetic induction on the working part of the magnet remains very high,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Thanks to the option of flexible forming and customization to custom solutions, NdFeB magnets can be created in a wide range of shapes and sizes, which increases their versatility,
  • Key role in future technologies – they are used in data components, electric motors, medical devices, also multitasking production systems.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Disadvantages of NdFeB magnets:
  • At very strong impacts they can crack, therefore we advise placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets decrease their strength 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 corrode. Therefore during using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • We suggest cover - magnetic mechanism, due to difficulties in producing threads inside the magnet and complex shapes.
  • Possible danger resulting from small fragments of magnets pose a threat, in case of ingestion, which gains importance in the context of child health protection. It is also worth noting that small elements of these products can disrupt the diagnostic process medical when they are in the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Holding force characteristics

Breakaway strength of the magnet in ideal conditionswhat contributes to it?

Magnet power was defined for the most favorable conditions, including:
  • using a plate made of low-carbon steel, serving as a ideal flux conductor
  • whose transverse dimension is min. 10 mm
  • with an ground touching surface
  • under conditions of gap-free contact (metal-to-metal)
  • during pulling in a direction vertical to the plane
  • in temp. approx. 20°C

Determinants of practical lifting force of a magnet

Bear in mind that the application force may be lower subject to elements below, in order of importance:
  • Distance (betwixt the magnet and the metal), since even a tiny distance (e.g. 0.5 mm) leads to a reduction in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
  • Force direction – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet exhibits much less (typically approx. 20-30% of nominal force).
  • Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Material composition – not every steel reacts the same. High carbon content weaken the attraction effect.
  • Surface quality – the more even the plate, the larger the contact zone and higher the lifting capacity. Roughness acts like micro-gaps.
  • Thermal environment – heating the magnet results in weakening of induction. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity was determined using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under vertically applied force, whereas under parallel forces the load capacity is reduced by as much as 5 times. Moreover, even a minimal clearance between the magnet and the plate lowers the holding force.

Safe handling of neodymium magnets
Fire risk

Dust created during grinding of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.

Pinching danger

Danger of trauma: The pulling power is so immense that it can cause hematomas, crushing, and even bone fractures. Protective gloves are recommended.

Impact on smartphones

Navigation devices and mobile phones are extremely susceptible to magnetism. Close proximity with a powerful NdFeB magnet can ruin the sensors in your phone.

Magnetic media

Equipment safety: Neodymium magnets can damage payment cards and sensitive devices (heart implants, hearing aids, mechanical watches).

Do not overheat magnets

Monitor thermal conditions. Exposing the magnet to high heat will ruin its properties and strength.

Allergy Warning

Some people experience a sensitization to nickel, which is the common plating for NdFeB magnets. Frequent touching may cause skin redness. We recommend use protective gloves.

Health Danger

For implant holders: Powerful magnets disrupt electronics. Keep minimum 30 cm distance or request help to handle the magnets.

Handling rules

Exercise caution. Rare earth magnets attract from a long distance and snap with huge force, often faster than you can move away.

Eye protection

Protect your eyes. Magnets can fracture upon violent connection, launching sharp fragments into the air. We recommend safety glasses.

Adults only

Strictly keep magnets out of reach of children. Choking hazard is significant, and the effects of magnets connecting inside the body are tragic.

Security! Looking for details? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98