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MP 22x6x10 / N38 - ring magnet

ring magnet

Catalog no 030394

GTIN/EAN: 5906301812319

5.00
Load capacity 13.65 kg / 133.89 N Magnetic Induction 416.85 mT / 4168 Gs
Diameter
22 mm [±0,1 mm]
internal diameter Ø
6 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
26.39 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

11.34net / pcs

13.95 zł with VAT (23% VAT) / pcs

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Quantity
Net
Gross
price from 1 pcs
11.34 zł
13.95 zł
price from 60 pcs
10.66 zł
13.11 zł
price from 230 pcs
9.98 zł
12.27 zł

Frequently asked questions

What is the hole in a ring magnet for?
For mounting on a screw or a shaft. The bore may be cylindrical or countersunk for a screw head. The hole removes magnet volume, so a ring holds less than a disc of the same outside diameter.
What is the polarisation?
Axial as standard — poles on the flat faces of the ring. Diametrical polarisation is made to order.
What sizes are available?
Outside diameter from 5 to 62 mm from stock. To order up to 200 mm outside diameter, 180 mm bore and 40 mm height, with a lead time of 25–35 days.

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

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Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Product card - MP 22x6x10 / N38 - ring magnet

Specification / characteristics - MP 22x6x10 / N38 - ring magnet

properties
properties values
Cat. no. 030394
GTIN/EAN 5906301812319
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 22 mm [±0,1 mm]
internal diameter Ø 6 mm [±0,1 mm]
Height 10 mm [±0,1 mm]
Weight 26.39 g
Magnetization Direction ↑ axial
Load capacity ~ ? 13.65 kg / 133.89 N
Magnetic Induction ~ ? 416.85 mT / 4168 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 22x6x10 / N38 - ring magnet
properties values units
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working 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 310 °C
Curie Temperature TF 590 °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 product - report

Presented information constitute the result of a mathematical calculation. Values rely on models for the material Nd2Fe14B. Actual conditions might slightly differ from theoretical values. Treat these data as a reference point when designing systems.

Table 1: Static pull force (pull vs distance) - interaction chart
MP 22x6x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5864 Gs
586.4 mT
13.65 kg / 30.09 lbs
13650.0 g / 133.9 N
dangerous!
1 mm 5326 Gs
532.6 mT
11.26 kg / 24.83 lbs
11261.1 g / 110.5 N
dangerous!
2 mm 4795 Gs
479.5 mT
9.13 kg / 20.12 lbs
9127.3 g / 89.5 N
medium risk
3 mm 4288 Gs
428.8 mT
7.30 kg / 16.09 lbs
7299.8 g / 71.6 N
medium risk
5 mm 3381 Gs
338.1 mT
4.54 kg / 10.01 lbs
4539.0 g / 44.5 N
medium risk
10 mm 1830 Gs
183.0 mT
1.33 kg / 2.93 lbs
1329.4 g / 13.0 N
safe
15 mm 1039 Gs
103.9 mT
0.43 kg / 0.95 lbs
428.7 g / 4.2 N
safe
20 mm 635 Gs
63.5 mT
0.16 kg / 0.35 lbs
159.9 g / 1.6 N
safe
30 mm 285 Gs
28.5 mT
0.03 kg / 0.07 lbs
32.1 g / 0.3 N
safe
50 mm 90 Gs
9.0 mT
0.00 kg / 0.01 lbs
3.2 g / 0.0 N
safe

Table 2: Slippage hold (wall)
MP 22x6x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 2.73 kg / 6.02 lbs
2730.0 g / 26.8 N
1 mm Stal (~0.2) 2.25 kg / 4.96 lbs
2252.0 g / 22.1 N
2 mm Stal (~0.2) 1.83 kg / 4.03 lbs
1826.0 g / 17.9 N
3 mm Stal (~0.2) 1.46 kg / 3.22 lbs
1460.0 g / 14.3 N
5 mm Stal (~0.2) 0.91 kg / 2.00 lbs
908.0 g / 8.9 N
10 mm Stal (~0.2) 0.27 kg / 0.59 lbs
266.0 g / 2.6 N
15 mm Stal (~0.2) 0.09 kg / 0.19 lbs
86.0 g / 0.8 N
20 mm Stal (~0.2) 0.03 kg / 0.07 lbs
32.0 g / 0.3 N
30 mm Stal (~0.2) 0.01 kg / 0.01 lbs
6.0 g / 0.1 N
50 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N

Table 3: Wall mounting (shearing) - vertical pull
MP 22x6x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
4.10 kg / 9.03 lbs
4095.0 g / 40.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
2.73 kg / 6.02 lbs
2730.0 g / 26.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.37 kg / 3.01 lbs
1365.0 g / 13.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
6.83 kg / 15.05 lbs
6825.0 g / 67.0 N

Table 4: Steel thickness (substrate influence) - power losses
MP 22x6x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
0.68 kg / 1.50 lbs
682.5 g / 6.7 N
1 mm
13%
1.71 kg / 3.76 lbs
1706.3 g / 16.7 N
2 mm
25%
3.41 kg / 7.52 lbs
3412.5 g / 33.5 N
3 mm
38%
5.12 kg / 11.28 lbs
5118.8 g / 50.2 N
5 mm
63%
8.53 kg / 18.81 lbs
8531.3 g / 83.7 N
10 mm
100%
13.65 kg / 30.09 lbs
13650.0 g / 133.9 N
11 mm
100%
13.65 kg / 30.09 lbs
13650.0 g / 133.9 N
12 mm
100%
13.65 kg / 30.09 lbs
13650.0 g / 133.9 N

Table 5: Thermal stability (stability) - power drop
MP 22x6x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 13.65 kg / 30.09 lbs
13650.0 g / 133.9 N
OK
40 °C -2.2% 13.35 kg / 29.43 lbs
13349.7 g / 131.0 N
OK
60 °C -4.4% 13.05 kg / 28.77 lbs
13049.4 g / 128.0 N
OK
80 °C -6.6% 12.75 kg / 28.11 lbs
12749.1 g / 125.1 N
100 °C -28.8% 9.72 kg / 21.43 lbs
9718.8 g / 95.3 N

Table 6: Magnet-Magnet interaction (attraction) - field collision
MP 22x6x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 54.34 kg / 119.79 lbs
6 106 Gs
8.15 kg / 17.97 lbs
8151 g / 80.0 N
N/A
1 mm 49.50 kg / 109.14 lbs
11 193 Gs
7.43 kg / 16.37 lbs
7426 g / 72.8 N
44.55 kg / 98.22 lbs
~0 Gs
2 mm 44.83 kg / 98.83 lbs
10 652 Gs
6.72 kg / 14.82 lbs
6724 g / 66.0 N
40.34 kg / 88.94 lbs
~0 Gs
3 mm 40.43 kg / 89.14 lbs
10 116 Gs
6.06 kg / 13.37 lbs
6065 g / 59.5 N
36.39 kg / 80.22 lbs
~0 Gs
5 mm 32.54 kg / 71.74 lbs
9 075 Gs
4.88 kg / 10.76 lbs
4881 g / 47.9 N
29.29 kg / 64.57 lbs
~0 Gs
10 mm 18.07 kg / 39.83 lbs
6 762 Gs
2.71 kg / 5.98 lbs
2710 g / 26.6 N
16.26 kg / 35.85 lbs
~0 Gs
20 mm 5.29 kg / 11.67 lbs
3 660 Gs
0.79 kg / 1.75 lbs
794 g / 7.8 N
4.76 kg / 10.50 lbs
~0 Gs
50 mm 0.27 kg / 0.60 lbs
828 Gs
0.04 kg / 0.09 lbs
41 g / 0.4 N
0.24 kg / 0.54 lbs
~0 Gs
60 mm 0.13 kg / 0.28 lbs
569 Gs
0.02 kg / 0.04 lbs
19 g / 0.2 N
0.12 kg / 0.25 lbs
~0 Gs
70 mm 0.07 kg / 0.15 lbs
408 Gs
0.01 kg / 0.02 lbs
10 g / 0.1 N
0.06 kg / 0.13 lbs
~0 Gs
80 mm 0.04 kg / 0.08 lbs
303 Gs
0.01 kg / 0.01 lbs
5 g / 0.1 N
0.03 kg / 0.07 lbs
~0 Gs
90 mm 0.02 kg / 0.05 lbs
231 Gs
0.00 kg / 0.01 lbs
3 g / 0.0 N
0.02 kg / 0.04 lbs
~0 Gs
100 mm 0.01 kg / 0.03 lbs
180 Gs
0.00 kg / 0.00 lbs
2 g / 0.0 N
0.01 kg / 0.03 lbs
~0 Gs

Table 7: Safety (HSE) (implants) - warnings
MP 22x6x10 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 15.5 cm
Hearing aid 10 Gs (1.0 mT) 12.0 cm
Timepiece 20 Gs (2.0 mT) 9.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 7.0 cm
Remote 50 Gs (5.0 mT) 6.5 cm
Payment card 400 Gs (40.0 mT) 3.0 cm
HDD hard drive 600 Gs (60.0 mT) 2.5 cm

Table 8: Dynamics (kinetic energy) - collision effects
MP 22x6x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 23.12 km/h
(6.42 m/s)
0.54 J
30 mm 24.35 km/h
(6.76 m/s)
0.60 J
50 mm 24.40 km/h
(6.78 m/s)
0.61 J
100 mm 24.41 km/h
(6.78 m/s)
0.61 J

Table 9: Coating parameters (durability)
MP 22x6x10 / 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 (Flux)
MP 22x6x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 16 465 Mx 164.7 µWb
Pc Coefficient 1.13 High (Stable)

Table 11: Underwater work (magnet fishing)
MP 22x6x10 / N38

Environment Effective steel pull Effect
Air (land) 13.65 kg Standard
Water (riverbed) 15.63 kg
(+1.98 kg buoyancy gain)
+14.5%
Warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

1. Vertical hold

*Caution: On a vertical wall, the magnet retains merely ~20% of its max power.

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) severely reduces the holding force.

3. Power loss vs temp

*For standard magnets, the max working temp is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.13

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%

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: 030394-2026
Measurement Calculator

Force (pull)


Magnetic Induction

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. 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 22x6x10 / 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.
The inner hole diameter determines the maximum size of the mounting element. For magnets with a straight hole, a conical head can act like a wedge and burst the magnet. Aesthetic mounting requires selecting the appropriate head size.
This model is characterized by dimensions Ø22x10 mm and a weight of 26.39 g. The pulling force of this model is an impressive 13.65 kg, which translates to 133.89 N in newtons. The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 6 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). When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Strengths and weaknesses of Nd2Fe14B magnets.

Advantages

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • They do not lose magnetism, even after around ten years – the decrease in power is only ~1% (according to tests),
  • Magnets perfectly protect themselves against loss of magnetization caused by external fields,
  • The use of an elegant finish of noble metals (nickel, gold, silver) causes the element to present itself better,
  • They show high magnetic induction at the operating surface, which increases their power,
  • Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
  • Possibility of detailed forming and modifying to defined needs,
  • Universal use in advanced technology sectors – they are used in data components, motor assemblies, diagnostic systems, also industrial machines.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Cons

Disadvantages of neodymium magnets:
  • To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
  • When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
  • Due to limitations in realizing nuts and complicated forms in magnets, we propose using a housing - magnetic mount.
  • Health risk related to microscopic parts of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child health protection. It is also worth noting that small elements of these products can be problematic in diagnostics medical after entering the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Holding force characteristics

Maximum holding power of the magnet – what it depends on?

Breakaway force was determined for optimal configuration, taking into account:
  • with the application of a yoke made of special test steel, guaranteeing maximum field concentration
  • whose transverse dimension is min. 10 mm
  • characterized by lack of roughness
  • under conditions of no distance (metal-to-metal)
  • under perpendicular application of breakaway force (90-degree angle)
  • at temperature approx. 20 degrees Celsius

Practical lifting capacity: influencing factors

Real force impacted by working environment parameters, including (from priority):
  • Distance (between the magnet and the plate), because even a very small clearance (e.g. 0.5 mm) leads to a drastic drop in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
  • Force direction – note that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Plate thickness – too thin plate does not close the flux, causing part of the power to be lost into the air.
  • Metal type – not every steel attracts identically. High carbon content worsen the attraction effect.
  • Surface condition – ground elements ensure maximum contact, which increases field saturation. Rough surfaces reduce efficiency.
  • Thermal factor – hot environment weakens magnetic field. Exceeding the limit temperature can permanently damage the magnet.

Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under shearing force the load capacity is reduced by as much as 5 times. In addition, even a minimal clearance between the magnet and the plate decreases the lifting capacity.

Warnings
Immense force

Handle magnets consciously. Their huge power can shock even professionals. Plan your moves and do not underestimate their power.

Magnets are brittle

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

Nickel coating and allergies

A percentage of the population suffer from a hypersensitivity to nickel, which is the common plating for neodymium magnets. Frequent touching might lead to an allergic reaction. We suggest use safety gloves.

Cards and drives

Avoid bringing magnets close to a purse, laptop, or TV. The magnetism can irreversibly ruin these devices and erase data from cards.

Demagnetization risk

Do not overheat. Neodymium magnets are sensitive to heat. If you require operation above 80°C, inquire about HT versions (H, SH, UH).

Threat to navigation

GPS units and mobile phones are extremely sensitive to magnetism. Direct contact with a strong magnet can permanently damage the internal compass in your phone.

Fire warning

Fire warning: Rare earth powder is highly flammable. Do not process magnets without safety gear as this may cause fire.

Finger safety

Big blocks can smash fingers instantly. Do not put your hand betwixt two strong magnets.

Do not give to children

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

Medical interference

Patients with a ICD must keep an safe separation from magnets. The magnetic field can stop the functioning of the life-saving device.

Warning! Need more info? Check our post: Are neodymium magnets dangerous?