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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

Technical analysis of the magnet - data

These data constitute the result of a physical simulation. Results are based on models for the material Nd2Fe14B. Real-world parameters may differ from theoretical values. Treat these calculations as a preliminary roadmap during assembly planning.

Table 1: Static force (pull vs gap) - 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
 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
Pulling power drops sharply per each millimeter of gap. Note that even a microscopic distance (e.g., contamination, paint, rust) strongly reduces the pull force. Magnets operate strongest during direct contact; air break kills the power. Observe how flashily the load capacity plummet, when the magnet does not touch directly to the steel surface. When calculating the mounting, eliminate redundant distances.

Table 2: Sliding force (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 table below shows the approximate weight limit required to cause the downward movement of the magnet down on a vertical steel wall (assuming typical friction coefficient). The holding force varies with the separation distance between the magnet and the surface.

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
When hanging a magnet on a vertical wall (e.g., a board), it you can count on just approx. 20%-30% of its nominal power. Gravity and a weak degree of grip mean that holders slide down faster than they pop off the substrate. Planning a hanger? Remember that the shear force is noticeably lower than the perpendicular breakaway force. On a painted metal, the element will slide down under a noticeably lighter weight. Utilizing a rubberized pad can drastically improve the result.

Table 4: Material efficiency (substrate influence) - 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 too thin steel is incapable of absorb the full magnetic flux, which squanders power of the magnet. If you attach a powerful product to a weak sheet, the flux will penetrate right through and the attraction force will be weaker. To achieve full efficiency of this magnet's power, you need a suitably thick piece of metal. The saturation phenomenon means that on sheet metal structures (e.g., appliance housings), the holder shows lower pull force. 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 change their properties strength past the thermal threshold. Protect against heat – heat can permanently destroy this product. With every degree above norm, the neodymium's power temporarily decreases. Do not use this product close to ovens exceeding its safe range. Too high temperature will cause destruction of magnetism.
*Technical advisory: Heat tolerance depends not only on the material grade, but also on the magnet's shape. Flat magnets (low permeance coefficient) are more susceptible to demagnetization sooner than long magnets. The danger warning in the table points to a risk of irreversible loss for this particular item.

Table 6: Two magnets (repulsion) - field collision
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 magnets interact from a much further distance than a magnet and steel setup. The connection of two magnets produces a massive flux and a wider radius of action. Designing a solid fastener? Use a pair of magnets instead of a neodymium and a striker plate. Remember that when connecting a pair of magnets, the impact force is huge. The levitation is marginally weaker than the connection force, but still large.
*Flux density for N-N configuration is approximately ~0 Gs at the midpoint of the gap (caused by magnetic field nullification).
* Results show shear force of a pair of identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Hazards (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
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
A strong magnetic field poses a real danger to electronics and medical implants. These NdFeB products generate a field that prevents correct functioning of digital equipment. Remember: the unseen radiation penetrates the body and plastic. Increased vigilance must be exercised by people with cochlear implants and drug dispensers. Also at risk are: automatic timepieces, car keys, speakers, and displays. Do not place the magnet near cards, hard drives, or precise measuring instruments.

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
Magnetic elements are very brittle – a violent impact against metal can result in shattering. Control the attraction moment – a magnet released freely becomes dangerous. Impact energy can cause material chips or painful pinches to fingers. Be sure to control the product during mounting so it doesn't hit with great force against the metal. A collision at high speed almost guarantees destruction of the neodymium. Wear eye protection when working 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)
The following table defines the conditions under which this product can be safely used. 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 emitted by the magnet pole. Essential parameter for generator designers as well as sensors. Pc value defines the working geometry.

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%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
In water, the magnet feels stronger thanks to Archimedes' principle. However, remember the water resistance when pulling the rope quickly.
1. Shear force

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

2. Plate thickness effect

*Thin steel (e.g. computer case) significantly limits the holding force.

3. Power loss vs temp

*For N38 material, 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

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.

Technical specification and ecology
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
Quick Unit Converter
Force (pull)
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The presented product is an incredibly powerful cylindrical magnet, composed of modern NdFeB material, which, with dimensions of Ø29x10 mm, guarantees the highest energy density. This specific item features an accuracy of ±0.1mm 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 in stock from our warehouse in Poland, ensuring lightning-fast order fulfillment. Furthermore, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
It finds application in modeling, advanced robotics, 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 low weight is crucial.
Due to the delicate structure of the ceramic sinter, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure stability in automation, 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 frequently chosen standard for industrial neodymium magnets, offering a great economic balance 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 key parameter here is the lifting capacity amounting to approximately 20.82 kg (force ~204.22 N), which, with such compact dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against oxidation, 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 through the diameter if your project requires it.

Advantages and disadvantages of Nd2Fe14B magnets.

Advantages

Apart from their consistent holding force, neodymium magnets have these key benefits:
  • They have constant strength, and over around 10 years their performance decreases symbolically – ~1% (in testing),
  • They retain their magnetic properties even under close interference source,
  • Thanks to the shiny finish, the surface of nickel, gold-plated, or silver-plated gives an professional appearance,
  • They feature high magnetic induction at the operating surface, which improves attraction properties,
  • 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...
  • Considering the option of accurate forming and customization to custom needs, neodymium magnets can be modeled in a variety of forms and dimensions, which amplifies use scope,
  • Significant place in future technologies – they serve a role in computer drives, drive modules, advanced medical instruments, also other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which makes them useful in miniature devices

Cons

Cons of neodymium magnets: weaknesses and usage proposals
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a steel housing, which not only secures them against impacts but also increases their durability
  • When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their strength 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 recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
  • We suggest casing - magnetic mechanism, due to difficulties in producing threads inside the magnet and complex forms.
  • Potential hazard resulting from small fragments of magnets can be dangerous, in case of ingestion, which becomes key in the context of child health protection. Additionally, tiny parts of these products can complicate diagnosis medical when they are in the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Holding force characteristics

Detachment force of the magnet in optimal conditions – what it depends on?

Breakaway force was determined for optimal configuration, taking into account:
  • with the contact of a sheet made of special test steel, guaranteeing full magnetic saturation
  • possessing a massiveness of at least 10 mm to avoid saturation
  • with an ground contact surface
  • under conditions of gap-free contact (surface-to-surface)
  • during detachment in a direction perpendicular to the mounting surface
  • at standard ambient temperature

Determinants of practical lifting force of a magnet

During everyday use, the real power is determined by several key aspects, listed from the most important:
  • Air gap (between the magnet and the plate), because even a tiny distance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
  • Angle of force application – highest force is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is typically many times lower (approx. 1/5 of the lifting capacity).
  • Steel thickness – insufficiently thick sheet does not accept the full field, causing part of the flux to be wasted into the air.
  • Material composition – different alloys attracts identically. Alloy additives worsen the attraction effect.
  • Smoothness – full contact is possible only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Operating temperature – NdFeB sinters have a sensitivity to temperature. When it is hot they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate reduces the load capacity.

Safety rules for work with NdFeB magnets
Demagnetization risk

Do not overheat. Neodymium magnets are susceptible to temperature. If you need resistance above 80°C, ask us about HT versions (H, SH, UH).

Fire warning

Dust generated during machining of magnets is self-igniting. Do not drill into magnets unless you are an expert.

Respect the power

Exercise caution. Rare earth magnets attract from a distance and connect with massive power, often faster than you can move away.

Eye protection

Protect your eyes. Magnets can explode upon uncontrolled impact, ejecting shards into the air. Wear goggles.

Do not give to children

Strictly store magnets away from children. Risk of swallowing is high, and the effects of magnets clamping inside the body are tragic.

Physical harm

Danger of trauma: The pulling power is so immense that it can cause blood blisters, crushing, and even bone fractures. Protective gloves are recommended.

Precision electronics

Remember: neodymium magnets generate a field that disrupts precision electronics. Keep a separation from your phone, tablet, and GPS.

Warning for heart patients

People with a heart stimulator must maintain an large gap from magnets. The magnetism can disrupt the operation of the life-saving device.

Data carriers

Do not bring magnets near a wallet, computer, or TV. The magnetism can irreversibly ruin these devices and wipe information from cards.

Allergic reactions

Some people suffer from a hypersensitivity to Ni, which is the standard coating for neodymium magnets. Frequent touching can result in skin redness. It is best to wear safety gloves.

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