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MW 29x10 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010053

GTIN/EAN: 5906301810520

5.00
Load capacity 20.82 kg / 204.22 N Magnetic Induction 351.88 mT / 3519 Gs
Diameter Ø
29 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
49.54 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel
product parameters »

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Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

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Parameters along with shape of neodymium magnets can be analyzed using our force calculator.

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Technical of the product - 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 simulation of the product - technical parameters

The following information are the outcome of a engineering calculation. Results were calculated on models for the class Nd2Fe14B. Actual conditions may deviate from the simulation results. Treat these calculations as a reference point when designing systems.

Table 1: Static pull force (force vs distance) - interaction chart
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
 warning
10 mm 1500 Gs
150.0 mT
 3.78 kg / 8.34 lbs
3783.1 g / 37.1 N
 warning
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 weakens sharply with every subsequent millimeter of gap. Remember that even a microscopic distance (e.g., contamination, varnish, veneer) noticeably weakens the grip. Neodymiums hold optimally during direct contact; gap kills the force. See how rapidly the load capacity fall, when the magnet does not touch tightly to the metal substrate. When calculating the arrangement, avoid unnecessary gaps.

Table 2: Sliding capacity (wall)
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 defines the theoretical holding capacity needed to cause the downward movement of the magnet down along a upright steel plate (considering standard friction coefficient). The holding force is relative to the separation distance between the magnet and the surface.

Table 3: Wall mounting (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 mounting a element on a upright plane (e.g., a fridge), it you can count on only about 1/5 of its maximum pull force. Gravitational force as well as a weak degree of grip mean that holders slide down faster than they detach. Planning a hanger? Note that the shear force is significantly lower than the maximum static pull force. On a painted metal, the magnet will slip down under a significantly smaller weight. Utilizing a rubberized coating can significantly improve the result.

Table 4: Steel thickness (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
A thin sheet is not enough to absorb the entire magnetic field, which weakens actual performance of the magnet. If you attach a powerful product to a too thin substrate, the flux will pass right through and the pull force will drop sharply. To squeeze the maximum of this neodymium's potential, you require a sufficiently solid piece of metal. The saturation effect means that on sheet metal structures (e.g., car bodies), the magnet shows lower pull force. We recommend selecting the steel cross-section based on the following data.

Table 5: Thermal stability (material behavior) - thermal limit
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
Classic neodymiums change their properties power above the temperature limit. Watch out for overheating – high temperature can permanently demagnetize this magnet. With every degree above norm, the neodymium's force temporarily drops. Avoid using this product in hot environments higher than its operating temperature limit. Too high temperature will cause destruction of magnetic properties.
*Engineering note: Heat tolerance is determined by both grade, but also on the magnet's shape. Low-profile magnets (low Pc) risk losing magnetic properties under lower heat stress compared to rod magnets. The danger warning in the table signals permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - field range
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 attract each other from a significantly greater distance than a neodymium and metal setup. The connection of two magnets produces a massive flux and a larger range of performance. Want to build a powerful holder? Utilize two neodymiums instead of a neodymium and a steel. Remember that when connecting a pair of magnets, the collision energy is extreme. The levitation is slightly lower than the attraction, but still impressive.
*Flux density between like poles reaches ~0 Gs at the midpoint between the magnets (caused by magnetic field nullification).
Note: Results refer to sliding force of two identical magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Protective zones (implants) - 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
Mechanical watch 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
A strong magnetic field poses a large risk to IT equipment and medical implants. These magnets produce a field that disrupts operation of sensitive medical devices. Be aware: the invisible magnetic field acts through matter and housings. Increased vigilance must be taken by people with hearing aids and insulin pumps. The risk also applies to: mechanical watches, remotes, speakers, and screens. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (cracking risk) - warning
MW 29x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 23.58 km/h
(6.55 m/s)
 1.06 J
30 mm 25.55 km/h
(7.10 m/s)
 1.25 J
50 mm 25.62 km/h
(7.12 m/s)
 1.25 J
100 mm 25.63 km/h
(7.12 m/s)
 1.26 J
NdFeB products are delicate – a strong collision with metal causes immediate chipping. Pay attention to connection velocity – a magnet released freely speeds with massive force. Striking energy can destroy the magnet or injury to skin. Always hold the magnet during mounting so it doesn't hit with great force against the steel surface. A collision at high speed ends with a crack of the magnet. Wear eye protection when handling with powerful specimens.

Table 9: Surface protection spec
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)
Neodymium magnets are highly susceptible to corrosion without proper protection. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Construction 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. Essential parameter in coil applications and motors. 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%
Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
Water displaces steel, making heavy objects slightly lighter. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Sliding resistance

*Warning: On a vertical surface, the magnet holds only ~20% of its max power.

2. Plate thickness effect

*Thin steel (e.g. 0.5mm PC case) drastically reduces the holding force.

3. Heat tolerance

*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.

Technical specification and ecology

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%

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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This product is an extremely powerful rod magnet, manufactured from modern NdFeB material, which, at dimensions of Ø29x10 mm, guarantees the highest energy density. This specific item features an accuracy of ±0.1mm and industrial build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with significant force (approx. 20.82 kg), this product is in stock from our warehouse in Poland, ensuring rapid order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It finds application in modeling, advanced automation, and broadly understood industry, serving as a positioning 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 miniature devices and wherever low weight is crucial.
Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 29.1 mm) using epoxy glues. 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.
Magnets N38 are suitable for the majority of applications in automation 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 oxidation, giving it an aesthetic, silvery shine.
This rod magnet 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.

Strengths and weaknesses of rare earth magnets.

Strengths

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • Their magnetic field is durable, and after around ten years it decreases only by ~1% (according to research),
  • They are extremely resistant to demagnetization induced by presence of other magnetic fields,
  • Thanks to the reflective finish, the coating of nickel, gold, or silver gives an modern appearance,
  • The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
  • 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...
  • Possibility of exact creating and adjusting to defined applications,
  • Universal use in modern industrial fields – they are used in data components, brushless drives, medical devices, also technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which makes them useful in small systems

Disadvantages

Characteristics of disadvantages of neodymium magnets: weaknesses and usage proposals
  • To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in realizing nuts and complicated shapes in magnets, we recommend using a housing - magnetic mechanism.
  • Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that small components of these magnets can be problematic in diagnostics medical after entering the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities

Pull force analysis

Maximum lifting capacity of the magnet – what affects it?

Information about lifting capacity was determined for optimal configuration, assuming:
  • using a base made of high-permeability steel, acting as a magnetic yoke
  • whose transverse dimension is min. 10 mm
  • characterized by smoothness
  • without the slightest clearance between the magnet and steel
  • under perpendicular force vector (90-degree angle)
  • in temp. approx. 20°C

Determinants of lifting force in real conditions

Holding efficiency impacted by working environment parameters, including (from priority):
  • Clearance – existence of any layer (rust, dirt, air) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Base massiveness – insufficiently thick steel does not accept the full field, causing part of the flux to be wasted into the air.
  • Material type – the best choice is pure iron steel. Hardened steels may attract less.
  • Surface condition – smooth surfaces guarantee perfect abutment, which increases field saturation. Uneven metal weaken the grip.
  • Temperature – heating the magnet results in weakening of force. Check the thermal limit for a given model.

Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, however under shearing force the holding force is lower. Additionally, even a slight gap between the magnet and the plate lowers the load capacity.

H&S for magnets
Swallowing risk

Absolutely store magnets away from children. Ingestion danger is significant, and the consequences of magnets connecting inside the body are life-threatening.

Permanent damage

Control the heat. Heating the magnet above 80 degrees Celsius will ruin its magnetic structure and strength.

Magnetic media

Avoid bringing magnets close to a wallet, laptop, or TV. The magnetic field can destroy these devices and erase data from cards.

Pacemakers

Individuals with a ICD have to maintain an large gap from magnets. The magnetic field can disrupt the functioning of the life-saving device.

Keep away from electronics

GPS units and mobile phones are highly sensitive to magnetic fields. Close proximity with a powerful NdFeB magnet can ruin the internal compass in your phone.

Hand protection

Danger of trauma: The attraction force is so immense that it can cause hematomas, pinching, and even bone fractures. Protective gloves are recommended.

Fire risk

Fire warning: Neodymium dust is explosive. Do not process magnets in home conditions as this may cause fire.

Skin irritation risks

It is widely known that nickel (the usual finish) is a potent allergen. If your skin reacts to metals, prevent direct skin contact or opt for versions in plastic housing.

Fragile material

NdFeB magnets are sintered ceramics, meaning they are prone to chipping. Clashing of two magnets leads to them breaking into shards.

Immense force

Before use, check safety instructions. Sudden snapping can break the magnet or injure your hand. Be predictive.

Safety First! Want to know more? Read our article: Why are neodymium magnets dangerous?