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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

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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

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 assembly - data

Presented values are the outcome of a physical simulation. Values rely on algorithms for the class Nd₂Fe₁₄B. Operational conditions might slightly differ from theoretical values. Please consider these data as a reference point when designing systems.

Table 1: Static pull force (force vs distance) - power drop
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	dangerous!
1 mm	3321 Gs 332.1 mT	18.55 kg / 18548.8 g 182.0 N	dangerous!
2 mm	3106 Gs 310.6 mT	16.23 kg / 16226.1 g 159.2 N	dangerous!
3 mm	2883 Gs 288.3 mT	13.98 kg / 13978.2 g 137.1 N	dangerous!
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	low risk
20 mm	563 Gs 56.3 mT	0.53 kg / 532.4 g 5.2 N	low risk
30 mm	247 Gs 24.7 mT	0.10 kg / 102.4 g 1.0 N	low risk
50 mm	72 Gs 7.2 mT	0.01 kg / 8.7 g 0.1 N	low risk

Pulling power decreases significantly with every subsequent millimeter of spacing. Remember that even a microscopic distance (e.g., contamination, varnish, rust) noticeably weakens the grip. Magnets work strongest during direct contact; gap drastically cuts the power. Notice how flashily the parameters plummet, when the product does not adhere flatly to the metal substrate. When designing the mounting, avoid unnecessary gaps.

Table 2: Shear force (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

This section presents the theoretical shear load sufficient to initiate the shifting of the magnet down along a upright metal surface (considering standard friction). The holding force is relative to the air gap between the magnet and the surface.

Table 3: Vertical assembly (sliding) - vertical pull
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 element on a upright wall (e.g., a car body), it you can count on only about 1/5 of its maximum pull force. Gravitational force and a low friction coefficient mean that products slide down easier than they pull off. Want to create a vertical fastening? Note that the shear force is significantly lower than the maximum static pull force. On a painted metal, the magnet will give way down under a noticeably lighter weight. Using a rubber coating can drastically increase the grip.

Table 4: Material efficiency (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 unable to focus the entire magnetic field, which wastes potential of the magnet. If you mount a strong magnet to a too thin substrate, the magnetism will penetrate right through and the pull force will drop sharply. To utilize the maximum of this magnet's power, you need a suitably thick backing of metal. The saturation effect means that on thin elements (e.g., appliance housings), the product works worse. We suggest choosing the steel thickness based on the following data.

Table 5: Thermal stability (stability) - resistance threshold
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 above the temperature limit. Protect against heat – excessive heat can permanently destroy this product. As the temperature rises, the neodymium's power temporarily lowers. Avoid using this product close to ovens higher than its working range. Too high temperature will lead to permanent loss of magnetism.

*Important note: Thermal stability 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 than taller cylinders. Warning indicator in the table indicates a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
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 magnets attract each other from a significantly greater distance than a neodymium and metal combination. Such a system of two magnets generates a stronger field and a further horizon of performance. Want to build a powerful holder? Use a pair of magnets instead of one magnet and a striker plate. Be careful that when bringing together two magnets, the collision energy is extreme. The repulsion force is marginally weaker than the connection force, but still significant.
*Flux density for N-N configuration reaches ~0 Gs at the midpoint of the gap (due to field cancellation).

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
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

Powerful magnet radiation poses a large risk to IT equipment and medical implants. These magnets produce a flux that destroys function of sensitive medical devices. Be aware: the invisible magnetic field passes through tissues and plastic. Increased vigilance must be exercised by people with hearing aids and insulin pumps. Also at risk are: mechanical watches, car keys, membranes, and screens. Do not place the magnet near cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (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

Neodymium magnets are prone to chipping – a collision with steel risks their cracking. Control the attraction moment – a neodymium left loose turns into a projectile. Impact energy can trigger coating fragments or dangerous crushing to fingers. Always hold the magnet during bringing near metal so it doesn't hit with great force against the metal. A collision at high speed ends with a crack of the magnet. Use safety goggles when handling with large magnets.

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: Electrical data (P_c)
MW 29x10 / N38

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

Total magnetic flux emitted by the pole surface. Key data when building generators and motors. The P_c coefficient determines the magnet's operating point.

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%

Corrosion warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.

Water displaces steel, making heavy objects slightly lighter. 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 merely a fraction of its nominal pull.

2. Steel saturation

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

3. Thermal stability

*For N38 grade, the safety 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.

Engineering data and GPSR

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%

Ecology and recycling (GPSR)

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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Magnet pull force

Force (N)

Force in lbs

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The offered product is a very strong cylinder magnet, composed of durable NdFeB material, which, at dimensions of Ø29x10 mm, guarantees optimal power. The MW 29x10 / N38 component is characterized by a tolerance of ±0.1mm and industrial build quality, making it an excellent solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 20.82 kg), this product is in stock from our warehouse in Poland, ensuring lightning-fast order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.

This model is created for building electric motors, 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 rod is indispensable in electronics 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 industry, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.

Magnets N38 are strong enough for 90% of applications in automation 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 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 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 through the diameter if your project requires it.

Advantages and disadvantages of rare earth magnets.

Pros

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:

They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (according to literature),
They retain their magnetic properties even under close interference source,
In other words, due to the smooth surface of gold, the element gains a professional look,
The surface of neodymium magnets generates a strong magnetic field – this is a distinguishing feature,
Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
Thanks to versatility in shaping and the ability to adapt to client solutions,
Universal use in innovative solutions – they are utilized in data components, drive modules, advanced medical instruments, as well as complex engineering applications.
Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Limitations

Disadvantages of NdFeB magnets:

Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a steel housing, which not only protects them against impacts but also raises their durability
We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
We recommend cover - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complex shapes.
Health risk resulting from small fragments of magnets are risky, if swallowed, which is particularly important in the context of child safety. It is also worth noting that small components of these devices can disrupt the diagnostic process medical when they are in the body.
Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Maximum lifting force for a neodymium magnet – what it depends on?

The specified lifting capacity concerns the limit force, measured under ideal test conditions, namely:

with the contact of a sheet made of low-carbon steel, ensuring maximum field concentration
whose transverse dimension equals approx. 10 mm
characterized by lack of roughness
under conditions of no distance (metal-to-metal)
during pulling in a direction vertical to the mounting surface
at conditions approx. 20°C

Lifting capacity in practice – influencing factors

It is worth knowing that the application force will differ subject to elements below, in order of importance:

Distance – existence of foreign body (rust, tape, gap) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
Force direction – declared lifting capacity refers to detachment vertically. When slipping, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
Steel grade – ideal substrate is pure iron steel. Hardened steels may attract less.
Surface condition – ground elements guarantee perfect abutment, which improves force. Uneven metal reduce efficiency.
Heat – NdFeB sinters have a sensitivity to temperature. When it is hot they are weaker, and in frost gain strength (up to a certain limit).

Lifting capacity was assessed by applying a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a slight gap between the magnet and the plate lowers the lifting capacity.

H&S for magnets

Serious injuries

Mind your fingers. Two powerful magnets will snap together instantly with a force of several hundred kilograms, destroying anything in their path. Be careful!

Keep away from children

Strictly store magnets out of reach of children. Ingestion danger is significant, and the consequences of magnets connecting inside the body are life-threatening.

Heat warning

Standard neodymium magnets (grade N) lose magnetization when the temperature surpasses 80°C. Damage is permanent.

Do not underestimate power

Exercise caution. Rare earth magnets attract from a distance and snap with massive power, often quicker than you can react.

Impact on smartphones

Note: neodymium magnets generate a field that interferes with sensitive sensors. Maintain a safe distance from your phone, device, and GPS.

Risk of cracking

Watch out for shards. Magnets can fracture upon violent connection, ejecting sharp fragments into the air. Eye protection is mandatory.

Fire risk

Mechanical processing of NdFeB material poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Magnetic media

Intense magnetic fields can erase data on payment cards, hard drives, and other magnetic media. Maintain a gap of at least 10 cm.

Allergy Warning

Allergy Notice: The Ni-Cu-Ni coating contains nickel. If skin irritation happens, cease handling magnets and wear gloves.

Medical implants

Patients with a pacemaker must keep an safe separation from magnets. The magnetism can stop the operation of the implant.

Danger! Learn more about risks in the article: Magnet Safety Guide.

MW 29x10 / N38 - cylindrical magnet

Technical - MW 29x10 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical simulation of the assembly - data

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

Table 2: Shear force (wall) MW 29x10 / N38

Table 3: Vertical assembly (sliding) - vertical pull MW 29x10 / N38

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

Table 5: Thermal stability (stability) - resistance threshold MW 29x10 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system MW 29x10 / N38

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

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

Table 9: Surface protection spec MW 29x10 / N38

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

Table 11: Underwater work (magnet fishing) MW 29x10 / N38

1. Shear force

2. Steel saturation

3. Thermal stability

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

Chemical composition

Ecology and recycling (GPSR)

Magnet pull force

Magnetic Field

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UMS 32x10.5x5.5x8 / N38 - conical magnetic holder

Advantages and disadvantages of rare earth magnets.

Pros

Limitations

Lifting parameters

Maximum lifting force for a neodymium magnet – what it depends on?

Lifting capacity in practice – influencing factors

H&S for magnets

Serious injuries

Keep away from children

Heat warning

Do not underestimate power

Impact on smartphones

Risk of cracking

Fire risk

Magnetic media

Allergy Warning

Medical implants

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

Table 2: Shear force (wall)
MW 29x10 / N38

Table 3: Vertical assembly (sliding) - vertical pull
MW 29x10 / N38

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

Table 5: Thermal stability (stability) - resistance threshold
MW 29x10 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 29x10 / N38

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

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

Table 9: Surface protection spec
MW 29x10 / N38

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

Table 11: Underwater work (magnet fishing)
MW 29x10 / N38