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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

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17.34 ZŁ with VAT / pcs + price for transport

14.10 ZŁ net + 23% VAT / pcs

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Lifting power and appearance of a magnet can be analyzed on our modular calculator.

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Product card - 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

Engineering analysis of the assembly - data

These values constitute the outcome of a engineering analysis. Values are based on models for the class Nd2Fe14B. Operational parameters may deviate from the simulation results. Please consider these calculations as a preliminary roadmap when designing systems.

Table 1: Static force (force vs distance) - 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 pounds
20820.0 g / 204.2 N
 dangerous!
1 mm 3321 Gs
332.1 mT
 18.55 kg / 40.89 pounds
18548.8 g / 182.0 N
 dangerous!
2 mm 3106 Gs
310.6 mT
 16.23 kg / 35.77 pounds
16226.1 g / 159.2 N
 dangerous!
3 mm 2883 Gs
288.3 mT
 13.98 kg / 30.82 pounds
13978.2 g / 137.1 N
 dangerous!
5 mm 2437 Gs
243.7 mT
 9.99 kg / 22.02 pounds
9987.1 g / 98.0 N
 warning
10 mm 1500 Gs
150.0 mT
 3.78 kg / 8.34 pounds
3783.1 g / 37.1 N
 warning
15 mm 905 Gs
90.5 mT
 1.38 kg / 3.04 pounds
1379.2 g / 13.5 N
 safe
20 mm 563 Gs
56.3 mT
 0.53 kg / 1.17 pounds
532.4 g / 5.2 N
 safe
30 mm 247 Gs
24.7 mT
 0.10 kg / 0.23 pounds
102.4 g / 1.0 N
 safe
50 mm 72 Gs
7.2 mT
 0.01 kg / 0.02 pounds
8.7 g / 0.1 N
 safe
Pulling power drops drastically per each millimeter of spacing. Keep in mind that even a very thin break (e.g., contamination, varnish, rust) strongly diminishes the holding power. Magnetic products hold most effectively in perfect adhesion; distance kills the power. See how rapidly the pull force fall, when the magnet does not adhere flatly to the steel surface. When designing the arrangement, avoid redundant distances.

Table 2: Shear force (wall)
MW 29x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 4.16 kg / 9.18 pounds
4164.0 g / 40.8 N
1 mm Stal (~0.2) 3.71 kg / 8.18 pounds
3710.0 g / 36.4 N
2 mm Stal (~0.2) 3.25 kg / 7.16 pounds
3246.0 g / 31.8 N
3 mm Stal (~0.2) 2.80 kg / 6.16 pounds
2796.0 g / 27.4 N
5 mm Stal (~0.2) 2.00 kg / 4.40 pounds
1998.0 g / 19.6 N
10 mm Stal (~0.2) 0.76 kg / 1.67 pounds
756.0 g / 7.4 N
15 mm Stal (~0.2) 0.28 kg / 0.61 pounds
276.0 g / 2.7 N
20 mm Stal (~0.2) 0.11 kg / 0.23 pounds
106.0 g / 1.0 N
30 mm Stal (~0.2) 0.02 kg / 0.04 pounds
20.0 g / 0.2 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
The table below defines the approximate holding capacity sufficient to cause the sliding of the magnet down along a vertical metal surface (assuming standard friction coefficient). The holding force varies with the separation distance between the magnet and the surface.

Table 3: Vertical assembly (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 pounds
6246.0 g / 61.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
4.16 kg / 9.18 pounds
4164.0 g / 40.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
2.08 kg / 4.59 pounds
2082.0 g / 20.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
10.41 kg / 22.95 pounds
10410.0 g / 102.1 N
When mounting a magnet on a vertical plane (e.g., a car body), it will only hold just approx. 20%-30% of its nominal power. Gravitational force and a weak degree of grip influence the fact that products move down easier than they pull off. Want to create a vertical fastening? Consider that the sliding force is noticeably lower than the perpendicular breakaway force. On a smooth steel, the magnet will give way down under a much lighter weight. Using a rubber coating can effectively raise the stability.

Table 4: Steel thickness (saturation) - sheet metal selection
MW 29x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
 1.04 kg / 2.30 pounds
1041.0 g / 10.2 N
1 mm
13%
 2.60 kg / 5.74 pounds
2602.5 g / 25.5 N
2 mm
25%
 5.21 kg / 11.48 pounds
5205.0 g / 51.1 N
3 mm
38%
 7.81 kg / 17.21 pounds
7807.5 g / 76.6 N
5 mm
63%
 13.01 kg / 28.69 pounds
13012.5 g / 127.7 N
10 mm
100%
 20.82 kg / 45.90 pounds
20820.0 g / 204.2 N
11 mm
100%
 20.82 kg / 45.90 pounds
20820.0 g / 204.2 N
12 mm
100%
 20.82 kg / 45.90 pounds
20820.0 g / 204.2 N
A too thin steel is incapable of focus the full magnetic flux, which wastes potential of the holder. Should you mount a strong magnet to a weak sheet, the field will penetrate right through and the attraction force will be weaker. To utilize the maximum of this neodymium's power, you need a suitably thick piece of metal. The saturation effect causes that on sheet metal structures (e.g., thin profiles), the product works worse. We advise picking the steel cross-section from these parameters.

Table 5: Working in heat (stability) - thermal limit
MW 29x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 20.82 kg / 45.90 pounds
20820.0 g / 204.2 N
 OK
40 °C -2.2% 20.36 kg / 44.89 pounds
20362.0 g / 199.8 N
 OK
60 °C -4.4% 19.90 kg / 43.88 pounds
19903.9 g / 195.3 N
80 °C -6.6% 19.45 kg / 42.87 pounds
19445.9 g / 190.8 N
100 °C -28.8% 14.82 kg / 32.68 pounds
14823.8 g / 145.4 N
Ordinary NdFeB products irreversibly lose power above the temperature limit. Avoid high temperatures – heat can irreversibly damage this magnet. With every degree above norm, the magnet's capacity temporarily lowers. Avoid using this magnet close to heaters higher than its safe range. Exceeding the critical threshold will lead to destruction of magnetism.
*Technical advisory: Thermal stability depends not only on the material grade, but also on the magnet's shape. Low-profile magnets (low Pc) risk losing magnetic properties under lower heat stress than long magnets. Red status in the table indicates a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - field range
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 pounds
5 016 Gs
7.56 kg / 16.67 pounds
7560 g / 74.2 N
 N/A
1 mm 47.70 kg / 105.17 pounds
6 845 Gs
7.16 kg / 15.78 pounds
7156 g / 70.2 N
 42.93 kg / 94.65 pounds
~0 Gs
2 mm 44.90 kg / 98.99 pounds
6 641 Gs
6.74 kg / 14.85 pounds
6735 g / 66.1 N
 40.41 kg / 89.09 pounds
~0 Gs
3 mm 42.08 kg / 92.77 pounds
6 429 Gs
6.31 kg / 13.92 pounds
6312 g / 61.9 N
 37.87 kg / 83.50 pounds
~0 Gs
5 mm 36.52 kg / 80.52 pounds
5 990 Gs
5.48 kg / 12.08 pounds
5478 g / 53.7 N
 32.87 kg / 72.47 pounds
~0 Gs
10 mm 24.18 kg / 53.30 pounds
4 873 Gs
3.63 kg / 7.99 pounds
3626 g / 35.6 N
 21.76 kg / 47.97 pounds
~0 Gs
20 mm 9.16 kg / 20.19 pounds
2 999 Gs
1.37 kg / 3.03 pounds
1374 g / 13.5 N
 8.24 kg / 18.17 pounds
~0 Gs
50 mm 0.54 kg / 1.19 pounds
729 Gs
0.08 kg / 0.18 pounds
81 g / 0.8 N
 0.49 kg / 1.07 pounds
~0 Gs
60 mm 0.25 kg / 0.55 pounds
493 Gs
0.04 kg / 0.08 pounds
37 g / 0.4 N
 0.22 kg / 0.49 pounds
~0 Gs
70 mm 0.12 kg / 0.27 pounds
347 Gs
0.02 kg / 0.04 pounds
18 g / 0.2 N
 0.11 kg / 0.24 pounds
~0 Gs
80 mm 0.06 kg / 0.14 pounds
252 Gs
0.01 kg / 0.02 pounds
10 g / 0.1 N
 0.06 kg / 0.13 pounds
~0 Gs
90 mm 0.04 kg / 0.08 pounds
188 Gs
0.01 kg / 0.01 pounds
5 g / 0.1 N
 0.03 kg / 0.07 pounds
~0 Gs
100 mm 0.02 kg / 0.05 pounds
144 Gs
0.00 kg / 0.01 pounds
3 g / 0.0 N
 0.02 kg / 0.04 pounds
~0 Gs
Two strong neodymiums interact from a significantly greater distance than a magnet and steel setup. Such a system of two magnets creates a more powerful interaction and a further horizon of performance. Planning to create a powerful holder? Apply two magnets instead of one magnet and a striker plate. Be careful that when attracting two neodymiums, the pinch force is huge. The repulsion force is marginally weaker than the attraction, but still significant.
*Field value in repulsion mode drops to ~0 Gs in the exact middle between the magnets (due to field cancellation).
Note: Results refer to shear force of a pair of matching magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (electronics) - precautionary measures
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
Mechanical watch 20 Gs (2.0 mT) 8.5 cm
Mobile device 40 Gs (4.0 mT) 6.5 cm
Car key 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
Extremely neodym field is a real danger to electronic devices and medical implants. These magnets produce a flux that destroys function of sensitive medical devices. Be aware: the invisible magnetic field passes through tissues and plastic. Increased vigilance must be taken by people with cochlear implants and insulin pumps. The risk also applies to: automatic timepieces, car keys, membranes, and screens. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Impact energy (kinetic energy) - warning
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
Neodymium magnets are very brittle – a violent impact against metal causes immediate chipping. Pay attention to connection velocity – a neodymium left loose speeds with massive force. Kinetic force can destroy the magnet or dangerous crushing to skin. Hold the magnet firmly during mounting so it doesn't hit violently against the steel surface. A collision at high speed ends with a crack of the magnet. Wear eye protection when working with powerful specimens.

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)
The SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (Flux)
MW 29x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 24 471 Mx 244.7 µWb
Pc Coefficient 0.45 Low (Flat)
Total magnetic flux passing through the pole surface. Essential parameter for generator designers and motors. Pc value defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
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: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
The magnetic field penetrates through water without any losses. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.
1. Sliding resistance

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

2. Efficiency vs thickness

*Thin steel (e.g. computer case) drastically weakens 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) = 0.45

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.

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%
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: 010053-2026
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This product is an exceptionally strong rod magnet, produced from modern NdFeB material, which, with dimensions of Ø29x10 mm, guarantees optimal power. This specific item boasts high dimensional repeatability and professional build quality, making it an ideal solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 20.82 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It successfully proves itself in DIY projects, advanced automation, and broadly understood industry, serving as a fastening or actuating element. 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 every gram matters.
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 epoxy glues. To ensure stability 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 frequently chosen standard for professional neodymium magnets, offering an optimal price-to-power ratio and operational stability. If you need even stronger magnets in the same volume (Ø29x10), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.
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 secures it against external factors, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 10 mm), which means that the N and S poles are located on the flat, circular surfaces. Such an arrangement is standard when connecting magnets in stacks (e.g., in filters) or when mounting in sockets at the bottom of a hole. On request, we can also produce versions magnetized diametrically if your project requires it.

Strengths and weaknesses of rare earth magnets.

Pros

Apart from their superior holding force, neodymium magnets have these key benefits:
  • They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (according to literature),
  • Neodymium magnets are characterized by extremely resistant to demagnetization caused by external interference,
  • In other words, due to the metallic layer of nickel, the element becomes visually attractive,
  • Magnets possess maximum magnetic induction on the active area,
  • 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 accurate creating as well as optimizing to concrete requirements,
  • Fundamental importance in modern technologies – they are utilized in hard drives, electromotive mechanisms, diagnostic systems, as well as technologically advanced constructions.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Weaknesses

Drawbacks and weaknesses of neodymium magnets: weaknesses and usage proposals
  • At strong impacts they can break, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
  • We recommend casing - magnetic mount, due to difficulties in creating threads inside the magnet and complicated forms.
  • Possible danger resulting from small fragments of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Additionally, small elements of these devices can complicate diagnosis medical after entering the body.
  • Due to complex production process, their price exceeds standard values,

Lifting parameters

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

Magnet power was determined for the most favorable conditions, taking into account:
  • with the use of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
  • with a cross-section no less than 10 mm
  • with an ideally smooth touching surface
  • without the slightest air gap between the magnet and steel
  • under vertical application of breakaway force (90-degree angle)
  • at conditions approx. 20°C

What influences lifting capacity in practice

It is worth knowing that the magnet holding will differ subject to the following factors, in order of importance:
  • Air gap (betwixt the magnet and the metal), because even a tiny distance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to varnish, rust or debris).
  • Force direction – note that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
  • Plate thickness – too thin plate does not accept the full field, causing part of the power to be escaped into the air.
  • Material composition – not every steel reacts the same. High carbon content weaken the interaction with the magnet.
  • Surface finish – ideal contact is possible only on smooth steel. Rough texture create air cushions, reducing force.
  • Thermal environment – heating the magnet causes a temporary drop of force. It is worth remembering the thermal limit for a given model.

Lifting capacity was determined with the use of a smooth steel plate of optimal thickness (min. 20 mm), under vertically applied force, whereas under shearing force the holding force is lower. Additionally, even a small distance between the magnet’s surface and the plate lowers the load capacity.

Safe handling of NdFeB magnets
Pinching danger

Watch your fingers. Two powerful magnets will join immediately with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!

Handling rules

Use magnets consciously. Their immense force can surprise even professionals. Stay alert and do not underestimate their force.

Threat to electronics

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

Threat to navigation

Note: rare earth magnets produce a field that interferes with sensitive sensors. Keep a separation from your phone, device, and GPS.

Flammability

Mechanical processing of NdFeB material poses a fire risk. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Risk of cracking

Neodymium magnets are ceramic materials, which means they are fragile like glass. Impact of two magnets will cause them shattering into small pieces.

Implant safety

Patients with a heart stimulator must maintain an absolute distance from magnets. The magnetism can stop the operation of the implant.

Danger to the youngest

Adult use only. Small elements pose a choking risk, leading to severe trauma. Keep away from children and animals.

Demagnetization risk

Avoid heat. Neodymium magnets are sensitive to temperature. If you require resistance above 80°C, look for HT versions (H, SH, UH).

Nickel coating and allergies

Some people suffer from a sensitization to nickel, which is the common plating for NdFeB magnets. Prolonged contact might lead to skin redness. We recommend use protective gloves.

Warning! More info about risks in the article: Safety of working with magnets.