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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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Detailed specification - 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 simulation of the magnet - report

Presented data represent the outcome of a physical analysis. Values were calculated on algorithms for the material Nd2Fe14B. Real-world performance may deviate from the simulation results. Use these calculations as a reference point when designing systems.

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
weak grip
20 mm 563 Gs
56.3 mT
0.53 kg / 1.17 LBS
532.4 g / 5.2 N
weak grip
30 mm 247 Gs
24.7 mT
0.10 kg / 0.23 LBS
102.4 g / 1.0 N
weak grip
50 mm 72 Gs
7.2 mT
0.01 kg / 0.02 LBS
8.7 g / 0.1 N
weak grip

Table 2: Slippage load (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

Table 3: Wall mounting (shearing) - 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 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

Table 4: Material efficiency (substrate influence) - 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

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 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

Table 6: Magnet-Magnet interaction (repulsion) - field collision
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

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
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

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

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: Construction data (Flux)
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%
Rust risk: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Sliding resistance

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

2. Efficiency vs thickness

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

3. Temperature resistance

*For N38 grade, 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

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.

Engineering data and GPSR
Material specification
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
Magnet Unit Converter
Force (pull)

Magnetic Induction

Other products

The offered product is an exceptionally strong cylinder magnet, manufactured from modern NdFeB material, which, with dimensions of Ø29x10 mm, guarantees the highest energy density. This specific item boasts high dimensional repeatability and industrial build quality, making it a perfect solution for professional engineers and designers. As a magnetic rod with significant force (approx. 20.82 kg), this product is in stock from our European logistics center, ensuring lightning-fast order fulfillment. Moreover, 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 created for building generators, advanced Hall effect sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the pull force of 204.22 N with a weight of only 49.54 g, this cylindrical magnet is indispensable in electronics and wherever low weight is crucial.
Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. To ensure stability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability 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.
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 key parameter here is the holding force amounting to approximately 20.82 kg (force ~204.22 N), which, with such defined 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.
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 and disadvantages of neodymium magnets.

Benefits

Apart from their notable holding force, neodymium magnets have these key benefits:
  • They retain full power for around 10 years – the loss is just ~1% (according to analyses),
  • They retain their magnetic properties even under external field action,
  • Thanks to the shimmering finish, the coating of nickel, gold, or silver-plated gives an visually attractive appearance,
  • The surface of neodymium magnets generates a concentrated magnetic field – this is a distinguishing feature,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for action at temperatures approaching 230°C and above...
  • Possibility of detailed machining as well as adjusting to individual needs,
  • Huge importance in high-tech industry – they serve a role in magnetic memories, brushless drives, precision medical tools, also other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which enables their usage in miniature devices

Cons

Problematic aspects of neodymium magnets and proposals for their use:
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects the magnet but also improves its resistance to damage
  • Neodymium magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • 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 secure oxidation and corrosion.
  • We suggest cover - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complex shapes.
  • Possible danger resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child health protection. It is also worth noting that small components of these products can disrupt the diagnostic process medical in case of swallowing.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Detachment force of the magnet in optimal conditionswhat it depends on?

Magnet power was determined for optimal configuration, including:
  • with the contact of a yoke made of special test steel, guaranteeing full magnetic saturation
  • possessing a thickness of min. 10 mm to ensure full flux closure
  • with an ground touching surface
  • without any insulating layer between the magnet and steel
  • under vertical application of breakaway force (90-degree angle)
  • at conditions approx. 20°C

Key elements affecting lifting force

Bear in mind that the application force will differ subject to the following factors, in order of importance:
  • Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
  • Angle of force application – highest force is obtained only during perpendicular pulling. The shear force of the magnet along the surface is usually several times lower (approx. 1/5 of the lifting capacity).
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
  • Chemical composition of the base – low-carbon steel gives the best results. Higher carbon content lower magnetic properties and holding force.
  • Surface condition – smooth surfaces guarantee perfect abutment, which improves force. Rough surfaces reduce efficiency.
  • Heat – NdFeB sinters have a sensitivity to temperature. When it is hot they are weaker, and in frost they can be stronger (up to a certain limit).

Lifting capacity was determined using a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, whereas under parallel forces the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet’s surface and the plate reduces the load capacity.

Warnings
Machining danger

Fire warning: Rare earth powder is highly flammable. Avoid machining magnets without safety gear as this risks ignition.

Safe distance

Avoid bringing magnets close to a purse, laptop, or screen. The magnetic field can permanently damage these devices and erase data from cards.

Physical harm

Protect your hands. Two powerful magnets will snap together immediately with a force of several hundred kilograms, destroying anything in their path. Exercise extreme caution!

Power loss in heat

Regular neodymium magnets (grade N) undergo demagnetization when the temperature goes above 80°C. The loss of strength is permanent.

Danger to the youngest

Strictly keep magnets out of reach of children. Ingestion danger is high, and the effects of magnets clamping inside the body are fatal.

Material brittleness

Beware of splinters. Magnets can fracture upon violent connection, launching shards into the air. Eye protection is mandatory.

Warning for allergy sufferers

Medical facts indicate that nickel (the usual finish) is a common allergen. For allergy sufferers, avoid direct skin contact or opt for encased magnets.

GPS Danger

A strong magnetic field disrupts the functioning of magnetometers in smartphones and navigation systems. Do not bring magnets near a device to prevent breaking the sensors.

Medical interference

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

Respect the power

Handle magnets with awareness. Their powerful strength can shock even professionals. Plan your moves and respect their power.

Attention! More info about risks in the article: Magnet Safety Guide.