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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

bulk discounts:

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Technical of the product - 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

Engineering simulation of the assembly - report

The following information are the direct effect of a physical analysis. Results were calculated on algorithms for the material Nd2Fe14B. Actual conditions may differ. Please consider these calculations as a reference point during assembly planning.

Table 1: Static pull force (pull vs gap) - 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
warning
1 mm 4400 Gs
440.0 mT
8.83 kg / 19.47 LBS
8832.4 g / 86.6 N
warning
2 mm 4254 Gs
425.4 mT
8.26 kg / 18.21 LBS
8258.2 g / 81.0 N
warning
3 mm 4107 Gs
410.7 mT
7.70 kg / 16.97 LBS
7697.5 g / 75.5 N
warning
5 mm 3812 Gs
381.2 mT
6.63 kg / 14.62 LBS
6630.0 g / 65.0 N
warning
10 mm 3097 Gs
309.7 mT
4.38 kg / 9.65 LBS
4375.1 g / 42.9 N
warning
15 mm 2463 Gs
246.3 mT
2.77 kg / 6.10 LBS
2767.8 g / 27.2 N
warning
20 mm 1939 Gs
193.9 mT
1.72 kg / 3.78 LBS
1715.2 g / 16.8 N
safe
30 mm 1202 Gs
120.2 mT
0.66 kg / 1.45 LBS
659.2 g / 6.5 N
safe
50 mm 509 Gs
50.9 mT
0.12 kg / 0.26 LBS
118.0 g / 1.2 N
safe

Table 2: Shear load (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: Wall mounting (sliding) - behavior on slippery surfaces
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: Material efficiency (saturation) - 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 (stability) - resistance threshold
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) - forces in the system
MP 60x20x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding 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: Protective zones (electronics) - warnings
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
Phone / Smartphone 40 Gs (4.0 mT) 15.0 cm
Remote 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: Collisions (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: Corrosion resistance
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: Construction 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: Submerged application
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%
Rust risk: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Wall mount (shear)

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

2. Efficiency vs thickness

*Thin steel (e.g. 0.5mm PC case) significantly limits the holding force.

3. Heat tolerance

*For N38 material, the max working temp 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
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%
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
Quick Unit Converter
Force (pull)

Magnetic Induction

View also proposals

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 easy screwing to wood, wall, plastic, or metal. It is also often used in advertising for fixing signs and in workshops for organizing tools.
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. When tightening the screw, you must maintain great sensitivity. We recommend tightening manually with a screwdriver, not an impact driver, because excessive force will cause the ring to crack. 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.
Moisture can penetrate micro-cracks in the coating and cause oxidation of the magnet. 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 magnets in hermetic housing or additional protection with varnish.
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. Always check that the screw head is not larger than the outer diameter of the magnet (60 mm), so it doesn't protrude beyond the outline.
It is a magnetic ring with a diameter of 60 mm and thickness 5 mm. The pulling force of this model is an impressive 9.41 kg, which translates to 92.27 N in newtons. The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 20 mm.
The poles are located on the planes with holes, not on the sides of the ring. 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.

Strengths and weaknesses of rare earth magnets.

Advantages

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They have constant strength, and over nearly 10 years their attraction force decreases symbolically – ~1% (in testing),
  • Neodymium magnets are extremely resistant to demagnetization caused by external magnetic fields,
  • Thanks to the metallic finish, the coating of Ni-Cu-Ni, gold, or silver gives an modern appearance,
  • The surface of neodymium magnets generates a intense magnetic field – this is one of their assets,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to freedom in designing and the ability to modify to specific needs,
  • Versatile presence in future technologies – they find application in HDD drives, electric motors, medical equipment, as well as complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which enables their usage in compact constructions

Disadvantages

Disadvantages of neodymium magnets:
  • To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
  • We warn that neodymium magnets can reduce 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. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation as well as corrosion.
  • Due to limitations in creating nuts and complicated forms in magnets, we recommend using cover - magnetic mechanism.
  • Health risk related to microscopic parts of magnets are risky, if swallowed, which becomes key in the context of child safety. Additionally, small elements of these magnets can disrupt the diagnostic process medical in case of swallowing.
  • Due to neodymium price, their price exceeds standard values,

Lifting parameters

Maximum holding power of the magnet – what contributes to it?

Breakaway force was defined for optimal configuration, including:
  • using a plate made of high-permeability steel, functioning as a ideal flux conductor
  • whose transverse dimension reaches at least 10 mm
  • characterized by even structure
  • with direct contact (no impurities)
  • under vertical force vector (90-degree angle)
  • at standard ambient temperature

Impact of factors on magnetic holding capacity in practice

Please note that the working load may be lower influenced by the following factors, starting with the most relevant:
  • Air gap (betwixt the magnet and the metal), since even a very small clearance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to varnish, corrosion or debris).
  • Direction of force – highest force is reached only during pulling at a 90° angle. The force required to slide of the magnet along the surface is usually many times lower (approx. 1/5 of the lifting capacity).
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
  • Material composition – different alloys attracts identically. High carbon content weaken the attraction effect.
  • Surface finish – ideal contact is possible only on smooth steel. Rough texture reduce the real contact area, reducing force.
  • Thermal environment – heating the magnet causes a temporary drop of force. Check the maximum operating temperature for a given model.

Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas under shearing force the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet and the plate reduces the lifting capacity.

Safety rules for work with NdFeB magnets
Allergy Warning

Certain individuals experience a contact allergy to Ni, which is the standard coating for NdFeB magnets. Extended handling may cause dermatitis. We suggest wear safety gloves.

GPS Danger

GPS units and smartphones are highly sensitive to magnetism. Direct contact with a strong magnet can ruin the internal compass in your phone.

Conscious usage

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

Warning for heart patients

Life threat: Strong magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.

Do not drill into magnets

Dust generated during grinding of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.

Heat sensitivity

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

Hand protection

Protect your hands. Two large magnets will join immediately with a force of several hundred kilograms, destroying anything in their path. Be careful!

Keep away from children

Neodymium magnets are not suitable for play. Swallowing several magnets can lead to them connecting inside the digestive tract, which constitutes a direct threat to life and necessitates urgent medical intervention.

Threat to electronics

Avoid bringing magnets close to a wallet, computer, or TV. The magnetism can permanently damage these devices and wipe information from cards.

Beware of splinters

NdFeB magnets are ceramic materials, which means they are fragile like glass. Collision of two magnets will cause them cracking into small pieces.

Security! Learn more about risks in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98