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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

technical details »

17.34 ZŁ with VAT / pcs + price for transport

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Technical - 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 product - report

These values represent the direct effect of a engineering simulation. Results rely on algorithms for the material Nd2Fe14B. Real-world conditions may differ from theoretical values. Use these calculations as a supplementary guide during assembly planning.

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 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
 strong
10 mm 1500 Gs
150.0 mT
 3.78 kg / 8.34 LBS
3783.1 g / 37.1 N
 strong
15 mm 905 Gs
90.5 mT
 1.38 kg / 3.04 LBS
1379.2 g / 13.5 N
 safe
20 mm 563 Gs
56.3 mT
 0.53 kg / 1.17 LBS
532.4 g / 5.2 N
 safe
30 mm 247 Gs
24.7 mT
 0.10 kg / 0.23 LBS
102.4 g / 1.0 N
 safe
50 mm 72 Gs
7.2 mT
 0.01 kg / 0.02 LBS
8.7 g / 0.1 N
 safe
Magnetic force drops sharply with every subsequent millimeter of gap. Keep in mind that even a microscopic distance (e.g., contamination, paint, veneer) noticeably weakens the grip. Neodymiums operate most effectively in perfect adhesion; air break nullifies the force. Notice how flashily the load capacity plummet, when the magnet does not touch tightly to the metal substrate. When planning the arrangement, avoid unnecessary gaps.

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
This section indicates the estimated shear load necessary to cause the shifting of the magnet vertically along a vertical steel plate (considering typical friction coefficient). This value is a function of 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 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 vertical plane (e.g., a car body), it will maintain barely approx. 20%-30% of its maximum pull force. Gravity as well as a low friction coefficient cause that holders move down faster than they pull off. Planning a hanger? Remember that the shear force is noticeably lower than the perpendicular breakaway force. On a painted metal, the holder will give way down under a much lighter cargo. Utilizing a rubberized pad can drastically raise the stability.

Table 4: Material efficiency (saturation) - 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
A thin metal plate is unable to take in the full magnetic flux, which weakens actual performance of the holder. Should you mount a strong magnet to a thin surface, the flux will penetrate right through and the pull force will drop sharply. To utilize 100% of this magnet's potential, you need a suitably thick element of steel. The saturation effect means that on sheet metal structures (e.g., appliance housings), the holder shows lower pull force. We suggest choosing the steel cross-section from these parameters.

Table 5: Working in heat (stability) - power drop
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
Ordinary NdFeB products irreversibly lose parameters after exceeding the maximum temperature. Avoid high temperatures – excessive heat can permanently damage this magnet. As the temperature rises, the magnet's force momentarily lowers. Do not use this product close to heaters exceeding its operating temperature limit. Too high temperature will lead to irreversible degradation of magnetism.
*Engineering note: Temperature resistance depends not only on the material grade, but also on the magnet's shape. Flat magnets (low Pc) risk losing magnetic properties at lower temperatures than long magnets. Warning indicator in the table indicates permanent field degradation for this specific geometry.

Table 6: Two magnets (repulsion) - 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
Two strong neodymiums interact from a wider radius than a magnet and sheet setup. The setup of magnet-to-magnet creates a more powerful interaction and a larger range of performance. Designing a strong closure? Use a pair of magnets instead of a neodymium and a steel. Exercise caution that when attracting two neodymiums, the pinch force is extreme. The levitation is marginally weaker than the attraction, but still significant.
*The magnetic induction for N-N configuration is approximately ~0 Gs at the geometric center of the gap (resulting from vector opposition).
Important: Results refer to shear force of a pair of identical magnets (friction coefficient ~0.15 for Ni-Ni coating).

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
Mobile device 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
Powerful magnet radiation poses a serious hazard to electronic devices as well as medical implants. These magnets produce a field that destroys function of digital equipment. Be aware: the unseen radiation passes through tissues and glass. Exceptional care must be taken by people with hearing aids and insulin pumps. The risk also applies to: mechanical watches, car keys, speakers, and screens. Do not bring the product near payment cards, HDD media, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - 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
NdFeB products are very brittle – a collision with steel risks their cracking. Watch the impact speed – a magnet released freely turns into a projectile. Impact energy can trigger coating fragments or dangerous crushing to fingers. Always hold the magnet during installation so it doesn't hit violently against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Use safety goggles when handling 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)
For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. 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 magnet pole. Key data for generator designers as well as sensors. 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%
Corrosion warning: 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. Shear force

*Note: On a vertical wall, the magnet retains merely a fraction of its perpendicular strength.

2. Efficiency vs thickness

*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) = 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
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%
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: 010053-2026
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The presented product is an exceptionally strong rod magnet, composed of durable NdFeB material, which, with dimensions of Ø29x10 mm, guarantees optimal power. This specific item boasts high dimensional repeatability and industrial 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 warehouse in Poland, ensuring lightning-fast order fulfillment. Moreover, its Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is perfect for building generators, advanced sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the pull force 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 tolerance of ±0.1mm, the recommended way 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, specialized industrial adhesives 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 a great economic balance 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 store.
This model is characterized by dimensions Ø29x10 mm, which, at a weight of 49.54 g, makes it an element with high magnetic energy density. 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.
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. 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.

Advantages as well as disadvantages of neodymium magnets.

Benefits

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • Their power is maintained, and after around ten years it decreases only by ~1% (according to research),
  • They do not lose their magnetic properties even under external field action,
  • A magnet with a smooth gold surface looks better,
  • They show high magnetic induction at the operating surface, making them more effective,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling operation at temperatures approaching 230°C and above...
  • Considering the option of flexible shaping and customization to individualized needs, NdFeB magnets can be created in a variety of shapes and sizes, which makes them more universal,
  • Key role in high-tech industry – they are used in HDD drives, motor assemblies, medical equipment, as well as multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which enables their usage in compact constructions

Disadvantages

Drawbacks and weaknesses of neodymium magnets: weaknesses and usage proposals
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a steel housing, which not only protects them against impacts but also increases their durability
  • When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their power 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
  • They rust in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in producing threads and complex forms in magnets, we recommend using cover - magnetic mount.
  • Health risk related to microscopic parts of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. Additionally, small components of these products can disrupt the diagnostic process medical when they are in the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Maximum magnetic pulling force – what contributes to it?

The specified lifting capacity represents the maximum value, recorded under ideal test conditions, meaning:
  • on a plate made of mild steel, effectively closing the magnetic flux
  • whose thickness is min. 10 mm
  • with a surface cleaned and smooth
  • under conditions of no distance (surface-to-surface)
  • for force applied at a right angle (in the magnet axis)
  • at standard ambient temperature

Practical lifting capacity: influencing factors

Real force is affected by working environment parameters, mainly (from most important):
  • Distance (between the magnet and the plate), since even a microscopic clearance (e.g. 0.5 mm) leads to a decrease in force by up to 50% (this also applies to varnish, corrosion or debris).
  • Angle of force application – highest force is obtained only during perpendicular pulling. The shear force of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
  • Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Plate material – mild steel attracts best. Higher carbon content lower magnetic permeability and holding force.
  • Surface quality – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Unevenness acts like micro-gaps.
  • 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 was measured by applying a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, however under attempts to slide the magnet the load capacity is reduced by as much as fivefold. In addition, even a slight gap between the magnet’s surface and the plate decreases the load capacity.

Safe handling of neodymium magnets
Physical harm

Watch your fingers. Two large magnets will join immediately with a force of several hundred kilograms, crushing anything in their path. Be careful!

Product not for children

Absolutely store magnets out of reach of children. Risk of swallowing is significant, and the consequences of magnets connecting inside the body are very dangerous.

Threat to electronics

Intense magnetic fields can erase data on credit cards, HDDs, and storage devices. Stay away of min. 10 cm.

GPS Danger

An intense magnetic field interferes with the operation of magnetometers in smartphones and GPS navigation. Do not bring magnets near a device to avoid damaging the sensors.

Maximum temperature

Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will destroy its magnetic structure and strength.

Nickel allergy

Allergy Notice: The Ni-Cu-Ni coating contains nickel. If redness appears, immediately stop working with magnets and wear gloves.

Caution required

Be careful. Neodymium magnets attract from a long distance and snap with massive power, often faster than you can move away.

Do not drill into magnets

Combustion risk: Rare earth powder is highly flammable. Do not process magnets in home conditions as this may cause fire.

Fragile material

Beware of splinters. Magnets can explode upon violent connection, launching shards into the air. We recommend safety glasses.

Danger to pacemakers

Individuals with a pacemaker should maintain an large gap from magnets. The magnetic field can disrupt the functioning of the implant.

Warning! Details about risks in the article: Magnet Safety Guide.