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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

product specifications »

17.34 ZŁ with VAT / pcs + price for transport

14.10 ZŁ net + 23% VAT / pcs

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Specifications and structure of a neodymium magnet can be estimated on our magnetic mass calculator.

Same-day processing for orders placed before 14:00.

Technical parameters - 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 analysis of the assembly - technical parameters

Presented information constitute the direct effect of a mathematical calculation. Results were calculated on algorithms for the class Nd2Fe14B. Operational conditions may differ. Use these calculations as a supplementary guide when designing systems.

Table 1: Static pull force (pull vs distance) - power drop
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
 dangerous!
1 mm 3321 Gs
332.1 mT
 18.55 kg / 40.89 LBS
18548.8 g / 182.0 N
 dangerous!
2 mm 3106 Gs
310.6 mT
 16.23 kg / 35.77 LBS
16226.1 g / 159.2 N
 dangerous!
3 mm 2883 Gs
288.3 mT
 13.98 kg / 30.82 LBS
13978.2 g / 137.1 N
 dangerous!
5 mm 2437 Gs
243.7 mT
 9.99 kg / 22.02 LBS
9987.1 g / 98.0 N
 medium risk
10 mm 1500 Gs
150.0 mT
 3.78 kg / 8.34 LBS
3783.1 g / 37.1 N
 medium risk
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
Magnetic force decreases significantly with every mm of distance. Note that every additional insulation layer (e.g., contamination, varnish, veneer) noticeably diminishes the holding power. Neodymiums operate optimally in perfect adhesion; air break nullifies the power. Analyze how rapidly the pull force fall, when the magnet does not adhere tightly to the steel surface. When calculating the mounting, avoid additional spacers.

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
The following data calculates the estimated force required to initiate the shifting of the magnet downwards on a vertical steel plate (considering standard friction coefficient). This parameter varies with the air gap between the magnet and the surface.

Table 3: Vertical assembly (shearing) - 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
When hanging a holder on a upright surface (e.g., a car body), it will only hold barely approx. 1/5 of nominal attraction strength. Gravity and a weak degree of grip mean that magnets slide down easier than they pop off the substrate. Want to create a wall mount? Note that the shear force is noticeably lower than the maximum static pull force. On a painted metal, the element will slide down under a much lighter weight. Using a rubber pad can significantly increase the grip.

Table 4: Material efficiency (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 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
A thin sheet cannot conduct the entire magnetic field, which weakens actual performance of the holder. If you mount a strong magnet to a weak sheet, the field will pass right through and the pull force will drop sharply. To utilize full efficiency of this magnet's power, you require a sufficiently solid element of steel. The material oversaturation causes that on delicate walls (e.g., thin profiles), the holder holds weaker. We advise picking the steel cross-section based on the following data.

Table 5: Thermal resistance (material behavior) - 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
Standard neodymium magnets irreversibly lose power past the thermal threshold. Avoid high temperatures – heat can irreversibly damage this product. With every degree above norm, the neodymium's force temporarily lowers. Do not use this product close to heaters exceeding its operating temperature limit. Too high temperature will lead to irreversible degradation of magnetic properties.
*Important note: Temperature resistance is determined by both grade, and the Permeance Coefficient Pc. Flat magnets (low permeance coefficient) may lose charge permanently sooner compared to rod magnets. Warning indicator in the table points to permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 29x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear 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
Two magnetic products attract each other from a wider radius than a neodymium and metal setup. Such a system of two magnets generates a stronger field and a further horizon of operation. Planning to create a strong closure? Apply two magnets instead of a neodymium and a steel. Be careful that when attracting two neodymiums, the collision energy is massive. The levitation is slightly lower than the attraction, but still significant.
*Flux density for N-N configuration is approximately ~0 Gs at the geometric center of the gap (caused by magnetic field nullification).
Attention: Results demonstrate shear force of two same neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (implants) - 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
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
A strong magnetic field is a real danger to IT equipment and pacemakers. These magnets generate a field that prevents correct functioning of digital equipment. Notice: the unseen radiation passes through tissues and glass. Increased vigilance must be taken by people with cochlear implants and drug dispensers. Also at risk are: automatic timepieces, car keys, membranes, and screens. Do not place the magnet near cards, hard drives, or sensitive navigation tools.

Table 8: Dynamics (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 magnet released freely turns into a projectile. Kinetic force can trigger coating fragments or injury to fingers. Always hold the magnet during mounting so it doesn't hit violently against the steel surface. A collision at high speed almost guarantees destruction of the neodymium. Wear eye protection when playing with large magnets.

Table 9: Corrosion resistance
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)
For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Improper coating selection is the most common cause of magnet failure over time.

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

Parameter Value SI Unit / Description
Magnetic Flux 24 471 Mx 244.7 µWb
Pc Coefficient 0.45 Low (Flat)
Flux value passing through the magnet pole. Key data for generator designers as well as sensors. Pc value determines 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.
Water displaces steel, making heavy objects slightly lighter. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.
1. Shear force

*Warning: On a vertical wall, the magnet retains only a fraction of its nominal pull.

2. Efficiency vs thickness

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

3. Thermal stability

*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.

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
Force (pull)
Magnetic Field
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This product is an incredibly powerful cylindrical magnet, manufactured from durable NdFeB material, which, with dimensions of Ø29x10 mm, guarantees the highest energy density. This specific item is characterized by a tolerance of ±0.1mm and industrial build quality, making it an excellent solution for the most demanding engineers and designers. As a magnetic rod with significant force (approx. 20.82 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring quick order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is perfect for building generators, advanced Hall effect sensors, and efficient filters, where maximum induction 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 miniature devices and wherever every gram matters.
Due to the delicate structure of the ceramic sinter, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure stability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Magnets NdFeB grade N38 are suitable for the majority of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. 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 available off-the-shelf 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. 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 neodymium magnets.

Advantages

Apart from their notable magnetism, neodymium magnets have these key benefits:
  • They retain full power for around 10 years – the loss is just ~1% (based on simulations),
  • They feature excellent resistance to magnetic field loss due to external magnetic sources,
  • A magnet with a smooth nickel surface has better aesthetics,
  • They are known for high magnetic induction at the operating surface, which increases their power,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Considering the potential of accurate forming and customization to individualized requirements, NdFeB magnets can be modeled in a variety of geometric configurations, which expands the range of possible applications,
  • Significant place in modern industrial fields – they are utilized in magnetic memories, electric drive systems, medical devices, as well as complex engineering applications.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Disadvantages of neodymium magnets:
  • To avoid cracks under impact, we suggest using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in creating threads and complicated shapes in magnets, we propose using a housing - magnetic holder.
  • Possible danger to health – tiny shards of magnets pose a threat, if swallowed, which is particularly important in the context of child safety. Furthermore, small components of these magnets can disrupt the diagnostic process medical when they are in the body.
  • With budget limitations the cost of neodymium magnets can be a barrier,

Pull force analysis

Maximum magnetic pulling force – what affects it?

Magnet power is the result of a measurement for optimal configuration, including:
  • on a plate made of mild steel, effectively closing the magnetic field
  • whose thickness is min. 10 mm
  • characterized by lack of roughness
  • under conditions of ideal adhesion (surface-to-surface)
  • under perpendicular force vector (90-degree angle)
  • at temperature room level

Magnet lifting force in use – key factors

It is worth knowing that the magnet holding will differ subject to elements below, in order of importance:
  • Air gap (between the magnet and the metal), as even a tiny distance (e.g. 0.5 mm) results in a drastic drop in lifting capacity by up to 50% (this also applies to varnish, rust or debris).
  • Angle of force application – highest force is available only during perpendicular pulling. The force required to slide of the magnet along the surface is standardly many times lower (approx. 1/5 of the lifting capacity).
  • Base massiveness – insufficiently thick plate causes magnetic saturation, causing part of the power to be wasted into the air.
  • Steel type – mild steel gives the best results. Alloy steels reduce magnetic permeability and holding force.
  • Surface finish – ideal contact is possible only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
  • Thermal conditions – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity testing was performed on a smooth plate of suitable thickness, under perpendicular forces, in contrast under shearing force the load capacity is reduced by as much as 5 times. In addition, even a minimal clearance between the magnet’s surface and the plate decreases the holding force.

Safe handling of NdFeB magnets
Magnetic media

Do not bring magnets near a purse, computer, or TV. The magnetism can permanently damage these devices and wipe information from cards.

Finger safety

Big blocks can crush fingers in a fraction of a second. Do not place your hand betwixt two strong magnets.

Heat warning

Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will destroy its properties and strength.

Safe operation

Handle magnets with awareness. Their powerful strength can shock even professionals. Stay alert and do not underestimate their force.

Flammability

Fire hazard: Rare earth powder is explosive. Avoid machining magnets without safety gear as this may cause fire.

Beware of splinters

Watch out for shards. Magnets can fracture upon uncontrolled impact, ejecting shards into the air. Eye protection is mandatory.

Adults only

Always store magnets out of reach of children. Risk of swallowing is high, and the consequences of magnets clamping inside the body are life-threatening.

Health Danger

Individuals with a heart stimulator must maintain an safe separation from magnets. The magnetic field can stop the operation of the implant.

Phone sensors

Note: neodymium magnets generate a field that disrupts sensitive sensors. Maintain a safe distance from your mobile, device, and navigation systems.

Allergic reactions

Nickel alert: The nickel-copper-nickel coating consists of nickel. If redness appears, immediately stop handling magnets and wear gloves.

Attention! Learn more about risks in the article: Safety of working with magnets.