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MW 29x10 / N38 - cylindrical magnet

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, Poland, 05-850, PL
Telephone: +48 22 499 98 98
Price range: 1-6500
Rating: 5

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

see technical specifications »

17.34 ZŁ with VAT / pcs + price for transport

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Physical properties - 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

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 modeling of the assembly - data

Presented data constitute the direct effect of a mathematical simulation. Results are based on models for the class Nd₂Fe₁₄B. Operational conditions might slightly deviate from the simulation results. Treat these data as a preliminary roadmap for designers.

Table 1: Static pull force (pull vs distance) - characteristics
MW 29x10 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	3518 Gs 351.8 mT	20.82 kg / 20820.0 g 204.2 N	crushing
1 mm	3321 Gs 332.1 mT	18.55 kg / 18548.8 g 182.0 N	crushing
2 mm	3106 Gs 310.6 mT	16.23 kg / 16226.1 g 159.2 N	crushing
3 mm	2883 Gs 288.3 mT	13.98 kg / 13978.2 g 137.1 N	crushing
5 mm	2437 Gs 243.7 mT	9.99 kg / 9987.1 g 98.0 N	strong
10 mm	1500 Gs 150.0 mT	3.78 kg / 3783.1 g 37.1 N	strong
15 mm	905 Gs 90.5 mT	1.38 kg / 1379.2 g 13.5 N	weak grip
20 mm	563 Gs 56.3 mT	0.53 kg / 532.4 g 5.2 N	weak grip
30 mm	247 Gs 24.7 mT	0.10 kg / 102.4 g 1.0 N	weak grip
50 mm	72 Gs 7.2 mT	0.01 kg / 8.7 g 0.1 N	weak grip

Magnetic force weakens drastically with every mm of gap. Remember that even a microscopic distance (e.g., dirt, paint, rust) significantly weakens the grip. Neodymiums hold most effectively during direct contact; gap nullifies the force. Notice how rapidly the load capacity drop, when the product does not touch tightly to the metal substrate. When planning the mounting, avoid redundant distances.

Table 2: Vertical capacity (wall)
MW 29x10 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	4.16 kg / 4164.0 g 40.8 N
1 mm	Stal (~0.2)	3.71 kg / 3710.0 g 36.4 N
2 mm	Stal (~0.2)	3.25 kg / 3246.0 g 31.8 N
3 mm	Stal (~0.2)	2.80 kg / 2796.0 g 27.4 N
5 mm	Stal (~0.2)	2.00 kg / 1998.0 g 19.6 N
10 mm	Stal (~0.2)	0.76 kg / 756.0 g 7.4 N
15 mm	Stal (~0.2)	0.28 kg / 276.0 g 2.7 N
20 mm	Stal (~0.2)	0.11 kg / 106.0 g 1.0 N
30 mm	Stal (~0.2)	0.02 kg / 20.0 g 0.2 N
50 mm	Stal (~0.2)	0.00 kg / 2.0 g 0.0 N

The table below calculates the estimated shear load necessary to cause the shifting of the magnet downwards on a vertical metal surface (assuming typical friction). This value varies with the gap size between the magnet and the metal.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 29x10 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	6.25 kg / 6246.0 g 61.3 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	4.16 kg / 4164.0 g 40.8 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	2.08 kg / 2082.0 g 20.4 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	10.41 kg / 10410.0 g 102.1 N

When placing a magnet on a upright wall (e.g., a board), it you can count on just about 1/5 of its nominal power. Gravitational force and a low friction coefficient influence the fact that magnets slide down faster than they pop off the substrate. Designing a vertical fastening? Consider that the shear force is noticeably lower than the maximum static pull force. On a slippery surface, the magnet will give way down under a much lighter cargo. Utilizing a rubberized layer can effectively increase the grip.

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 29x10 / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	5%	1.04 kg / 1041.0 g 10.2 N
1 mm	13%	2.60 kg / 2602.5 g 25.5 N
2 mm	25%	5.21 kg / 5205.0 g 51.1 N
5 mm	63%	13.01 kg / 13012.5 g 127.7 N
10 mm	100%	20.82 kg / 20820.0 g 204.2 N

A thin metal plate is incapable of take in the full magnetic flux, which squanders power of the holder. If you install a neodymium to a weak sheet, the flux will pass right through and the holding will be smaller. To achieve 100% of this neodymium's power, you need a suitably thick backing of metal. The saturation effect means that on thin elements (e.g., thin profiles), the holder shows lower pull force. We suggest choosing the steel cross-section according to the table below.

Table 5: Thermal stability (stability) - thermal limit
MW 29x10 / N38

Ambient temp. (°C)	Power loss	Remaining pull	Status
20 °C	0.0%	20.82 kg / 20820.0 g 204.2 N	OK
40 °C	-2.2%	20.36 kg / 20362.0 g 199.8 N	OK
60 °C	-4.4%	19.90 kg / 19903.9 g 195.3 N
80 °C	-6.6%	19.45 kg / 19445.9 g 190.8 N
100 °C	-28.8%	14.82 kg / 14823.8 g 145.4 N

Ordinary NdFeB products irreversibly lose strength past the thermal threshold. Protect against heat – excessive heat can irreversibly damage this product. As the temperature rises, the magnet's force temporarily lowers. Refrain from using this product near heat sources exceeding its working range. Ignoring the limit will cause irreversible degradation of magnetism.

*Engineering note: Temperature resistance depends not only on the material grade, but also on the magnet's shape. Thin magnets (low Pc) are more susceptible to demagnetization under lower heat stress than taller cylinders. The danger warning in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (attraction) - field range
MW 29x10 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	50.40 kg / 50399 g 494.4 N 5 016 Gs	N/A
1 mm	47.70 kg / 47704 g 468.0 N 6 845 Gs	42.93 kg / 42934 g 421.2 N ~0 Gs
2 mm	44.90 kg / 44901 g 440.5 N 6 641 Gs	40.41 kg / 40411 g 396.4 N ~0 Gs
3 mm	42.08 kg / 42082 g 412.8 N 6 429 Gs	37.87 kg / 37874 g 371.5 N ~0 Gs
5 mm	36.52 kg / 36522 g 358.3 N 5 990 Gs	32.87 kg / 32870 g 322.5 N ~0 Gs
10 mm	24.18 kg / 24176 g 237.2 N 4 873 Gs	21.76 kg / 21758 g 213.4 N ~0 Gs
20 mm	9.16 kg / 9158 g 89.8 N 2 999 Gs	8.24 kg / 8242 g 80.9 N ~0 Gs
50 mm	0.54 kg / 542 g 5.3 N 729 Gs	0.49 kg / 487 g 4.8 N ~0 Gs

Two magnetic products attract each other from a significantly greater distance than a magnet and sheet combination. The connection of two magnets generates a stronger field and a wider radius of action. Designing a strong closure? Utilize two neodymiums instead of a neodymium and a striker plate. Remember that when connecting a pair of magnets, the impact force is huge. The repulsion force is a bit weaker than the attraction, but still large.
*Flux density for N-N configuration is approximately ~0 Gs at the geometric center of the gap (resulting from vector opposition).

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
Mechanical watch	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 serious hazard to IT equipment as well as medical implants. These NdFeB products produce a field that destroys function of digital equipment. Be aware: the unseen radiation acts through matter and glass. Special caution must be taken by people with cochlear implants and drug dispensers. Also at risk are: mechanical watches, remotes, speakers, and screens. Do not place the magnet near cards, hard drives, or sensitive navigation tools.

Table 8: Collisions (kinetic energy) - warning
MW 29x10 / N38

Start from (mm)	Speed (km/h)	Energy (J)
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 prone to chipping – a violent impact against metal can result in shattering. Pay attention to connection velocity – a neodymium left loose turns into a projectile. Striking energy can trigger coating fragments or injury to fingers. 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 neodymium. Wear safety glasses when playing 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. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Electrical data (Flux)
MW 29x10 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	24 471 Mx	244.7 µWb
P_c Coefficient	0.45	Low (Flat)

Flux value emitted by the pole surface. Key data when building generators and motors. The P_c coefficient determines 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: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

In water, the magnet feels stronger thanks to Archimedes' principle. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Shear force

*Note: On a vertical wall, the magnet retains just ~20% of its nominal pull.

2. Plate thickness effect

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

3. Power loss vs temp

*For N38 grade, the critical limit is 80°C.

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

chart generated for the permeance coefficient P_c (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 P_c (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 P_c 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: 010053-2025

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The offered product is an extremely powerful rod magnet, produced from modern NdFeB material, which, with dimensions of Ø29x10 mm, guarantees optimal power. The MW 29x10 / N38 model features an accuracy of ±0.1mm and professional build quality, making it a perfect 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. 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 created for building generators, advanced sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the high power of 204.22 N with a weight of only 49.54 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.

Since our magnets have a tolerance of ±0.1mm, the best method is to glue them into holes with a slightly larger diameter (e.g., 29.1 mm) using two-component epoxy glues. To ensure stability 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.

Magnets NdFeB grade N38 are suitable for the majority of applications in modeling and machine building, where excessive 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 in continuous sale 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 protects the surface against external factors, 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. Such an arrangement is most desirable 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.

Pros and cons 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 drops only by ~1% (theoretically),
Neodymium magnets are distinguished by extremely resistant to loss of magnetic properties caused by magnetic disturbances,
The use of an metallic coating of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures reaching 230°C and above...
Thanks to modularity in constructing and the capacity to customize to individual projects,
Wide application in high-tech industry – they are utilized in mass storage devices, drive modules, advanced medical instruments, and technologically advanced constructions.
Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Disadvantages

Disadvantages of NdFeB magnets:

At very strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
We warn that neodymium magnets can reduce their strength 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 rust. Therefore when using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
We recommend a housing - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complicated forms.
Health risk to health – tiny shards of magnets can be dangerous, if swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, small components of these magnets are able to complicate diagnosis medical in case of swallowing.
Due to complex production process, their price is relatively high,

Pull force analysis

Maximum magnetic pulling force – what contributes to it?

Magnet power was determined for optimal configuration, including:

using a sheet made of high-permeability steel, serving as a ideal flux conductor
possessing a thickness of min. 10 mm to ensure full flux closure
characterized by lack of roughness
with zero gap (no coatings)
during detachment in a direction vertical to the plane
at ambient temperature approx. 20 degrees Celsius

Lifting capacity in real conditions – factors

Bear in mind that the working load will differ depending on elements below, in order of importance:

Clearance – the presence of foreign body (rust, tape, gap) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
Pull-off angle – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the maximum value.
Plate thickness – insufficiently thick plate does not accept the full field, causing part of the power to be lost to the other side.
Material composition – not every steel reacts the same. High carbon content worsen the interaction with the magnet.
Surface finish – ideal contact is obtained only on polished steel. Rough texture create air cushions, weakening the magnet.
Heat – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).

Lifting capacity testing was performed on a smooth plate of optimal thickness, under perpendicular forces, however under shearing force the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet’s surface and the plate reduces the lifting capacity.

Warnings

Magnets are brittle

Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Avoid impacts, as the magnet may shatter into hazardous fragments.

Handling guide

Handle magnets with awareness. Their immense force can surprise even experienced users. Be vigilant and respect their power.

Machining danger

Powder generated during cutting of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.

Data carriers

Powerful magnetic fields can erase data on payment cards, HDDs, and other magnetic media. Maintain a gap of min. 10 cm.

Impact on smartphones

Note: rare earth magnets produce a field that disrupts precision electronics. Maintain a safe distance from your phone, tablet, and navigation systems.

Sensitization to coating

Nickel alert: The nickel-copper-nickel coating consists of nickel. If redness happens, cease working with magnets and use protective gear.

Hand protection

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

Demagnetization risk

Do not overheat. NdFeB magnets are susceptible to heat. If you need resistance above 80°C, look for HT versions (H, SH, UH).

No play value

Strictly keep magnets away from children. Choking hazard is significant, and the effects of magnets clamping inside the body are fatal.

Life threat

For implant holders: Strong magnetic fields affect medical devices. Maintain at least 30 cm distance or request help to work with the magnets.

Safety First! Need more info? Read our article: Are neodymium magnets dangerous?

MW 29x10 / N38 - cylindrical magnet

Physical properties - MW 29x10 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering modeling of the assembly - data

Table 1: Static pull force (pull vs distance) - characteristics MW 29x10 / N38

Table 2: Vertical capacity (wall) MW 29x10 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces MW 29x10 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection MW 29x10 / N38

Table 5: Thermal stability (stability) - thermal limit MW 29x10 / N38

Table 6: Two magnets (attraction) - field range MW 29x10 / N38

Table 7: Hazards (implants) - precautionary measures MW 29x10 / N38

Table 8: Collisions (kinetic energy) - warning MW 29x10 / N38

Table 9: Anti-corrosion coating durability MW 29x10 / N38

Table 10: Electrical data (Flux) MW 29x10 / N38

Table 11: Hydrostatics and buoyancy MW 29x10 / N38

1. Shear force

2. Plate thickness effect

3. Power loss vs temp

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

Chemical composition

Sustainability

Force (pull)

Magnetic Field

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Pros and cons of rare earth magnets.

Strengths

Disadvantages

Pull force analysis

Maximum magnetic pulling force – what contributes to it?

Lifting capacity in real conditions – factors

Warnings

Magnets are brittle

Handling guide

Machining danger

Data carriers

Impact on smartphones

Sensitization to coating

Hand protection

Demagnetization risk

No play value

Life threat

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs distance) - characteristics
MW 29x10 / N38

Table 2: Vertical capacity (wall)
MW 29x10 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 29x10 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 29x10 / N38

Table 5: Thermal stability (stability) - thermal limit
MW 29x10 / N38

Table 6: Two magnets (attraction) - field range
MW 29x10 / N38

Table 7: Hazards (implants) - precautionary measures
MW 29x10 / N38

Table 8: Collisions (kinetic energy) - warning
MW 29x10 / N38

Table 9: Anti-corrosion coating durability
MW 29x10 / N38

Table 10: Electrical data (Flux)
MW 29x10 / N38

Table 11: Hydrostatics and buoyancy
MW 29x10 / N38