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MW 29x10 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010053

GTIN/EAN: 5906301810520

5.00

Diameter Ø

29 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

49.54 g

Magnetization Direction

↑ axial

Load capacity

20.82 kg / 204.22 N

Magnetic Induction

351.88 mT / 3519 Gs

Coating

[NiCuNi] Nickel

17.34 with VAT / pcs + price for transport

14.10 ZŁ net + 23% VAT / pcs

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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

Engineering analysis of the magnet - technical parameters

Presented data are the outcome of a mathematical analysis. Results rely on models for the material Nd2Fe14B. Actual parameters might slightly differ. Use these data as a supplementary guide for designers.

Table 1: Static force (force 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 pounds
20820.0 g / 204.2 N
critical level
1 mm 3321 Gs
332.1 mT
18.55 kg / 40.89 pounds
18548.8 g / 182.0 N
critical level
2 mm 3106 Gs
310.6 mT
16.23 kg / 35.77 pounds
16226.1 g / 159.2 N
critical level
3 mm 2883 Gs
288.3 mT
13.98 kg / 30.82 pounds
13978.2 g / 137.1 N
critical level
5 mm 2437 Gs
243.7 mT
9.99 kg / 22.02 pounds
9987.1 g / 98.0 N
strong
10 mm 1500 Gs
150.0 mT
3.78 kg / 8.34 pounds
3783.1 g / 37.1 N
strong
15 mm 905 Gs
90.5 mT
1.38 kg / 3.04 pounds
1379.2 g / 13.5 N
low risk
20 mm 563 Gs
56.3 mT
0.53 kg / 1.17 pounds
532.4 g / 5.2 N
low risk
30 mm 247 Gs
24.7 mT
0.10 kg / 0.23 pounds
102.4 g / 1.0 N
low risk
50 mm 72 Gs
7.2 mT
0.01 kg / 0.02 pounds
8.7 g / 0.1 N
low risk

Table 2: Sliding 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

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
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

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

Table 5: Thermal resistance (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 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

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

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (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

Table 7: Protective zones (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
Mechanical watch 20 Gs (2.0 mT) 8.5 cm
Phone / Smartphone 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

Table 8: Collisions (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

Table 9: Coating parameters (durability)
MW 29x10 / N38

Technical parameter Value / Description
Coating type [NiCuNi] Nickel
Layer structure Nickel - Copper - Nickel
Layer thickness 10-20 µm
Salt spray test (SST) ? 24 h
Recommended environment Indoors only (dry)

Table 10: 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)

Table 11: Underwater work (magnet fishing)
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.
1. Wall mount (shear)

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

2. Steel saturation

*Thin steel (e.g. 0.5mm PC case) significantly limits the holding force.

3. Heat tolerance

*For N38 material, the safety limit is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.45

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. The solid red line represents the demagnetization curve (material potential), while the dashed blue line is the load line based on the magnet's geometry. The Pc (Permeance Coefficient), also known as the load line slope, is a dimensionless value that describes the relationship between the magnet's shape and its magnetic stability. The intersection of these two lines (the black dot) is the operating point — it determines the actual magnetic flux density generated by the magnet in this specific configuration. A higher Pc value means the magnet is more 'slender' (tall relative to its area), resulting in a higher operating point and better resistance to irreversible demagnetization caused by external fields or temperature. A value of 0.42 is relatively low (typical for flat magnets), meaning the operating point is closer to the 'knee' of the curve — caution is advised when operating at temperatures near the maximum limit to avoid strength loss.

Technical 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
Measurement Calculator
Force (pull)

Field Strength

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The offered product is an incredibly powerful cylindrical magnet, manufactured from modern NdFeB material, which, at dimensions of Ø29x10 mm, guarantees maximum efficiency. This specific item features an accuracy of ±0.1mm and professional build quality, making it an excellent solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 20.82 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
It successfully proves itself in modeling, advanced automation, and broadly understood industry, serving as a fastening or actuating element. 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 every gram matters.
Due to the delicate structure of the ceramic sinter, we absolutely advise against force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. To ensure long-term durability in automation, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. 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 warehouse.
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 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 and cons of Nd2Fe14B magnets.

Benefits

Besides their tremendous pulling force, neodymium magnets offer the following advantages:
  • They retain magnetic properties for nearly 10 years – the drop is just ~1% (based on simulations),
  • Neodymium magnets prove to be remarkably resistant to loss of magnetic properties caused by external interference,
  • A magnet with a metallic gold surface looks better,
  • Neodymium magnets deliver maximum magnetic induction on a their surface, which allows for strong attraction,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling action at temperatures reaching 230°C and above...
  • Thanks to the potential of free shaping and customization to specialized requirements, NdFeB magnets can be modeled in a wide range of forms and dimensions, which makes them more universal,
  • Universal use in electronics industry – they serve a role in hard drives, drive modules, precision medical tools, and industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which enables their usage in miniature devices

Weaknesses

Disadvantages of NdFeB magnets:
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
  • Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation and corrosion.
  • We recommend casing - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complex shapes.
  • Health risk resulting from small fragments of magnets pose a threat, in case of ingestion, which becomes key in the context of child safety. It is also worth noting that small components of these devices can complicate diagnosis medical when they are in the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Lifting parameters

Breakaway strength of the magnet in ideal conditionswhat contributes to it?

Breakaway force was defined for the most favorable conditions, taking into account:
  • with the use of a sheet made of low-carbon steel, ensuring full magnetic saturation
  • whose transverse dimension reaches at least 10 mm
  • with a surface cleaned and smooth
  • without any clearance between the magnet and steel
  • during detachment in a direction vertical to the plane
  • at conditions approx. 20°C

Lifting capacity in practice – influencing factors

Effective lifting capacity is influenced by working environment parameters, including (from priority):
  • Space between surfaces – every millimeter of separation (caused e.g. by varnish or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Angle of force application – maximum parameter is obtained only during pulling at a 90° angle. The shear force of the magnet along the surface is usually many times lower (approx. 1/5 of the lifting capacity).
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet limits the lifting capacity (the magnet "punches through" it).
  • Metal type – not every steel attracts identically. Alloy additives worsen the attraction effect.
  • Surface condition – smooth surfaces guarantee perfect abutment, which increases field saturation. Uneven metal reduce efficiency.
  • Temperature – heating the magnet results in weakening of force. It is worth remembering the maximum operating temperature for a given model.

Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under shearing force the load capacity is reduced by as much as fivefold. Additionally, even a small distance between the magnet’s surface and the plate decreases the lifting capacity.

Safety rules for work with NdFeB magnets
Phone sensors

Navigation devices and mobile phones are highly sensitive to magnetic fields. Close proximity with a strong magnet can ruin the internal compass in your phone.

ICD Warning

People with a heart stimulator must keep an large gap from magnets. The magnetic field can interfere with the functioning of the life-saving device.

Fire risk

Powder generated during grinding of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.

Hand protection

Big blocks can smash fingers in a fraction of a second. Never put your hand betwixt two attracting surfaces.

Adults only

Absolutely store magnets away from children. Choking hazard is significant, and the consequences of magnets clamping inside the body are very dangerous.

Power loss in heat

Watch the temperature. Exposing the magnet to high heat will destroy its magnetic structure and strength.

Material brittleness

Protect your eyes. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. Wear goggles.

Electronic devices

Data protection: Neodymium magnets can ruin data carriers and sensitive devices (pacemakers, medical aids, mechanical watches).

Allergy Warning

Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If redness appears, immediately stop handling magnets and use protective gear.

Caution required

Use magnets with awareness. Their huge power can surprise even experienced users. Stay alert and do not underestimate their power.

Danger! Need more info? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98