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MW 29x10 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010053

GTIN/EAN: 5906301810520

5.00

Diameter Ø

29 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

49.54 g

Magnetization Direction

↑ axial

Load capacity

20.82 kg / 204.22 N

Magnetic Induction

351.88 mT / 3519 Gs

Coating

[NiCuNi] Nickel

17.34 with VAT / pcs + price for transport

14.10 ZŁ net + 23% VAT / pcs

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Strength as well as form of neodymium magnets can be estimated on our online calculation tool.

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Technical parameters of the product - MW 29x10 / N38 - cylindrical magnet

Specification / characteristics - MW 29x10 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010053
GTIN/EAN 5906301810520
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 Ø 29 mm [±0,1 mm]
Height 10 mm [±0,1 mm]
Weight 49.54 g
Magnetization Direction ↑ axial
Load capacity ~ ? 20.82 kg / 204.22 N
Magnetic Induction ~ ? 351.88 mT / 3519 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 29x10 / N38 - cylindrical 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 simulation of the assembly - data

The following data are the direct effect of a engineering simulation. Results were calculated on algorithms for the material Nd2Fe14B. Operational performance might slightly deviate from the simulation results. Please consider these data as a reference point during assembly planning.

Table 1: Static pull force (force vs gap) - characteristics
MW 29x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3518 Gs
351.8 mT
20.82 kg / 45.90 lbs
20820.0 g / 204.2 N
crushing
1 mm 3321 Gs
332.1 mT
18.55 kg / 40.89 lbs
18548.8 g / 182.0 N
crushing
2 mm 3106 Gs
310.6 mT
16.23 kg / 35.77 lbs
16226.1 g / 159.2 N
crushing
3 mm 2883 Gs
288.3 mT
13.98 kg / 30.82 lbs
13978.2 g / 137.1 N
crushing
5 mm 2437 Gs
243.7 mT
9.99 kg / 22.02 lbs
9987.1 g / 98.0 N
warning
10 mm 1500 Gs
150.0 mT
3.78 kg / 8.34 lbs
3783.1 g / 37.1 N
warning
15 mm 905 Gs
90.5 mT
1.38 kg / 3.04 lbs
1379.2 g / 13.5 N
low risk
20 mm 563 Gs
56.3 mT
0.53 kg / 1.17 lbs
532.4 g / 5.2 N
low risk
30 mm 247 Gs
24.7 mT
0.10 kg / 0.23 lbs
102.4 g / 1.0 N
low risk
50 mm 72 Gs
7.2 mT
0.01 kg / 0.02 lbs
8.7 g / 0.1 N
low risk

Table 2: Vertical capacity (vertical surface)
MW 29x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 4.16 kg / 9.18 lbs
4164.0 g / 40.8 N
1 mm Stal (~0.2) 3.71 kg / 8.18 lbs
3710.0 g / 36.4 N
2 mm Stal (~0.2) 3.25 kg / 7.16 lbs
3246.0 g / 31.8 N
3 mm Stal (~0.2) 2.80 kg / 6.16 lbs
2796.0 g / 27.4 N
5 mm Stal (~0.2) 2.00 kg / 4.40 lbs
1998.0 g / 19.6 N
10 mm Stal (~0.2) 0.76 kg / 1.67 lbs
756.0 g / 7.4 N
15 mm Stal (~0.2) 0.28 kg / 0.61 lbs
276.0 g / 2.7 N
20 mm Stal (~0.2) 0.11 kg / 0.23 lbs
106.0 g / 1.0 N
30 mm Stal (~0.2) 0.02 kg / 0.04 lbs
20.0 g / 0.2 N
50 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 g / 0.0 N

Table 3: Wall mounting (sliding) - vertical pull
MW 29x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
6.25 kg / 13.77 lbs
6246.0 g / 61.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
4.16 kg / 9.18 lbs
4164.0 g / 40.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
2.08 kg / 4.59 lbs
2082.0 g / 20.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
10.41 kg / 22.95 lbs
10410.0 g / 102.1 N

Table 4: Material efficiency (substrate influence) - power losses
MW 29x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
1.04 kg / 2.30 lbs
1041.0 g / 10.2 N
1 mm
13%
2.60 kg / 5.74 lbs
2602.5 g / 25.5 N
2 mm
25%
5.21 kg / 11.48 lbs
5205.0 g / 51.1 N
3 mm
38%
7.81 kg / 17.21 lbs
7807.5 g / 76.6 N
5 mm
63%
13.01 kg / 28.69 lbs
13012.5 g / 127.7 N
10 mm
100%
20.82 kg / 45.90 lbs
20820.0 g / 204.2 N
11 mm
100%
20.82 kg / 45.90 lbs
20820.0 g / 204.2 N
12 mm
100%
20.82 kg / 45.90 lbs
20820.0 g / 204.2 N

Table 5: Thermal resistance (stability) - resistance threshold
MW 29x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 20.82 kg / 45.90 lbs
20820.0 g / 204.2 N
OK
40 °C -2.2% 20.36 kg / 44.89 lbs
20362.0 g / 199.8 N
OK
60 °C -4.4% 19.90 kg / 43.88 lbs
19903.9 g / 195.3 N
80 °C -6.6% 19.45 kg / 42.87 lbs
19445.9 g / 190.8 N
100 °C -28.8% 14.82 kg / 32.68 lbs
14823.8 g / 145.4 N

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 29x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 50.40 kg / 111.11 lbs
5 016 Gs
7.56 kg / 16.67 lbs
7560 g / 74.2 N
N/A
1 mm 47.70 kg / 105.17 lbs
6 845 Gs
7.16 kg / 15.78 lbs
7156 g / 70.2 N
42.93 kg / 94.65 lbs
~0 Gs
2 mm 44.90 kg / 98.99 lbs
6 641 Gs
6.74 kg / 14.85 lbs
6735 g / 66.1 N
40.41 kg / 89.09 lbs
~0 Gs
3 mm 42.08 kg / 92.77 lbs
6 429 Gs
6.31 kg / 13.92 lbs
6312 g / 61.9 N
37.87 kg / 83.50 lbs
~0 Gs
5 mm 36.52 kg / 80.52 lbs
5 990 Gs
5.48 kg / 12.08 lbs
5478 g / 53.7 N
32.87 kg / 72.47 lbs
~0 Gs
10 mm 24.18 kg / 53.30 lbs
4 873 Gs
3.63 kg / 7.99 lbs
3626 g / 35.6 N
21.76 kg / 47.97 lbs
~0 Gs
20 mm 9.16 kg / 20.19 lbs
2 999 Gs
1.37 kg / 3.03 lbs
1374 g / 13.5 N
8.24 kg / 18.17 lbs
~0 Gs
50 mm 0.54 kg / 1.19 lbs
729 Gs
0.08 kg / 0.18 lbs
81 g / 0.8 N
0.49 kg / 1.07 lbs
~0 Gs
60 mm 0.25 kg / 0.55 lbs
493 Gs
0.04 kg / 0.08 lbs
37 g / 0.4 N
0.22 kg / 0.49 lbs
~0 Gs
70 mm 0.12 kg / 0.27 lbs
347 Gs
0.02 kg / 0.04 lbs
18 g / 0.2 N
0.11 kg / 0.24 lbs
~0 Gs
80 mm 0.06 kg / 0.14 lbs
252 Gs
0.01 kg / 0.02 lbs
10 g / 0.1 N
0.06 kg / 0.13 lbs
~0 Gs
90 mm 0.04 kg / 0.08 lbs
188 Gs
0.01 kg / 0.01 lbs
5 g / 0.1 N
0.03 kg / 0.07 lbs
~0 Gs
100 mm 0.02 kg / 0.05 lbs
144 Gs
0.00 kg / 0.01 lbs
3 g / 0.0 N
0.02 kg / 0.04 lbs
~0 Gs

Table 7: Safety (HSE) (electronics) - warnings
MW 29x10 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 13.5 cm
Hearing aid 10 Gs (1.0 mT) 10.5 cm
Timepiece 20 Gs (2.0 mT) 8.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 6.5 cm
Remote 50 Gs (5.0 mT) 6.0 cm
Payment card 400 Gs (40.0 mT) 2.5 cm
HDD hard drive 600 Gs (60.0 mT) 2.0 cm

Table 8: Dynamics (cracking risk) - collision effects
MW 29x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.90 km/h
(6.36 m/s)
1.00 J
30 mm 35.92 km/h
(9.98 m/s)
2.47 J
50 mm 46.24 km/h
(12.85 m/s)
4.09 J
100 mm 65.38 km/h
(18.16 m/s)
8.17 J

Table 9: Anti-corrosion coating durability
MW 29x10 / 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)
MW 29x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 24 471 Mx 244.7 µWb
Pc Coefficient 0.45 Low (Flat)

Table 11: Submerged application
MW 29x10 / N38

Environment Effective steel pull Effect
Air (land) 20.82 kg Standard
Water (riverbed) 23.84 kg
(+3.02 kg buoyancy gain)
+14.5%
Rust risk: 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)

*Note: On a vertical surface, the magnet holds merely approx. 20-30% of its perpendicular strength.

2. Steel saturation

*Thin steel (e.g. 0.5mm PC case) drastically limits 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 Pc (Permeance Coefficient) = 0.45

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.

Technical and environmental data
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: 010053-2026
Measurement Calculator
Pulling force

Magnetic Field

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The offered product is a very strong rod magnet, made from durable NdFeB material, which, at dimensions of Ø29x10 mm, guarantees optimal power. The MW 29x10 / N38 component is characterized by a tolerance of ±0.1mm and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 20.82 kg), this product is in stock from our European logistics center, ensuring lightning-fast order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is created for building electric motors, advanced Hall effect sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the high power of 204.22 N with a weight of only 49.54 g, this rod is indispensable in electronics and wherever low weight is crucial.
Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 29.1 mm) using two-component epoxy glues. To ensure long-term durability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering an optimal price-to-power ratio and operational stability. If you need the strongest magnets in the same volume (Ø29x10), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 29 mm and height 10 mm. The value of 204.22 N means that the magnet is capable of holding a weight many times exceeding its own mass of 49.54 g. The product has a [NiCuNi] coating, which protects the surface against external factors, giving it an aesthetic, silvery shine.
Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 29 mm. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized diametrically if your project requires it.

Pros as well as cons of rare earth magnets.

Advantages

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • Their magnetic field is durable, and after around 10 years it drops only by ~1% (according to research),
  • Magnets perfectly protect themselves against loss of magnetization caused by external fields,
  • By covering with a smooth coating of nickel, the element gains an nice look,
  • Magnets are characterized by maximum magnetic induction on the surface,
  • 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 freedom in designing and the ability to customize to client solutions,
  • Key role in modern technologies – they are commonly used in mass storage devices, drive modules, advanced medical instruments, also complex engineering applications.
  • Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Limitations

Characteristics of disadvantages of neodymium magnets and proposals for their use:
  • At very strong impacts they can crack, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets suffer 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
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
  • We suggest casing - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complex shapes.
  • Possible danger related to microscopic parts of magnets are risky, if swallowed, which gains importance in the context of child safety. Additionally, tiny parts of these products can complicate diagnosis medical after entering the body.
  • Due to expensive raw materials, their price is relatively high,

Pull force analysis

Maximum lifting force for a neodymium magnet – what affects it?

The load parameter shown concerns the limit force, obtained under laboratory conditions, namely:
  • with the application of a sheet made of low-carbon steel, ensuring maximum field concentration
  • with a thickness minimum 10 mm
  • characterized by lack of roughness
  • under conditions of gap-free contact (metal-to-metal)
  • during pulling in a direction vertical to the mounting surface
  • in temp. approx. 20°C

Determinants of practical lifting force of a magnet

In real-world applications, the real power results from many variables, ranked from crucial:
  • Air gap (between the magnet and the plate), because even a tiny clearance (e.g. 0.5 mm) leads to a drastic drop in lifting capacity by up to 50% (this also applies to varnish, rust or debris).
  • Force direction – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
  • Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Material type – the best choice is pure iron steel. Stainless steels may have worse magnetic properties.
  • Surface condition – ground elements ensure maximum contact, which improves field saturation. Uneven metal reduce efficiency.
  • Thermal factor – hot environment reduces magnetic field. Too high temperature can permanently demagnetize the magnet.

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the lifting capacity is smaller. In addition, even a small distance between the magnet and the plate decreases the holding force.

Precautions when working with NdFeB magnets
Life threat

Patients with a pacemaker have to maintain an safe separation from magnets. The magnetic field can stop the operation of the implant.

Safe distance

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

Immense force

Before starting, read the rules. Sudden snapping can destroy the magnet or hurt your hand. Think ahead.

No play value

Always keep magnets away from children. Ingestion danger is high, and the effects of magnets connecting inside the body are very dangerous.

GPS Danger

A powerful magnetic field interferes with the operation of magnetometers in smartphones and GPS navigation. Do not bring magnets near a smartphone to prevent damaging the sensors.

Metal Allergy

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

Finger safety

Risk of injury: The attraction force is so immense that it can cause hematomas, pinching, and broken bones. Protective gloves are recommended.

Magnet fragility

Despite metallic appearance, neodymium is brittle and cannot withstand shocks. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Heat sensitivity

Regular neodymium magnets (N-type) lose magnetization when the temperature goes above 80°C. The loss of strength is permanent.

Fire risk

Fire hazard: Neodymium dust is highly flammable. Do not process magnets without safety gear as this risks ignition.

Caution! Want to know more? Check our post: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98