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MW 24x6 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010048

GTIN/EAN: 5906301810476

5.00
Load capacity 9.98 kg / 97.88 N Magnetic Induction 277.18 mT / 2772 Gs
Diameter Ø
24 mm [±0,1 mm]
Height
6 mm [±0,1 mm]
Weight
20.36 g
Magnetization Direction
↑ axial
Coating
[Zn] Zinc

How we measure these parameters — certificates and measurements

technical details »

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Frequently asked questions

What is the maximum working temperature of a disc magnet?
Standard N-series grades work up to 80 °C. Grades N50, N52 and N54 have a lower limit of 60 °C, because coercivity falls as BHmax rises. Higher temperatures require the H (120 °C), SH (150 °C), UH (180 °C), EH (200 °C) or AH (230 °C) series. Within the working range the magnet loses about 0.11% of its induction per degree, and that loss is reversible.
What is the difference between N38, N42 and N52?
The number after N is the energy product BHmax. Moving from N38 to N52 raises it by several tens of percent, but the real holding force increases by roughly 20%, because force also depends on geometry and on the magnetic circuit. N52 costs about twice as much as N42, so for most mounting work N38–N42 is the best price-to-force ratio.
What is the dimensional tolerance?
±0.1 mm as standard, ±0.05 mm to order. The tolerance is stated next to the dimensions on every product page.

Guides from the knowledge base

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.

PDF report Calculator
Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Technical details - MW 24x6 / N38 - cylindrical magnet

Specification / characteristics - MW 24x6 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010048
GTIN/EAN 5906301810476
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 24 mm [±0,1 mm]
Height 6 mm [±0,1 mm]
Weight 20.36 g
Magnetization Direction ↑ axial
Load capacity ~ ? 9.98 kg / 97.88 N
Magnetic Induction ~ ? 277.18 mT / 2772 Gs
Coating [Zn] Zinc
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 24x6 / N38 - cylindrical magnet
properties values units
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working 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 310 °C
Curie Temperature TF 590 °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

Physical simulation of the magnet - report

The following values are the direct effect of a engineering analysis. Results were calculated on models for the material Nd2Fe14B. Operational parameters might slightly differ. Please consider these data as a supplementary guide when designing systems.

Table 1: Static pull force (pull vs distance) - interaction chart
MW 24x6 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2771 Gs
277.1 mT
 9.98 kg / 22.00 lbs
9980.0 g / 97.9 N
 warning
1 mm 2609 Gs
260.9 mT
 8.85 kg / 19.50 lbs
8846.4 g / 86.8 N
 warning
2 mm 2420 Gs
242.0 mT
 7.61 kg / 16.78 lbs
7609.6 g / 74.7 N
 warning
3 mm 2216 Gs
221.6 mT
 6.38 kg / 14.07 lbs
6383.0 g / 62.6 N
 warning
5 mm 1805 Gs
180.5 mT
 4.23 kg / 9.33 lbs
4233.2 g / 41.5 N
 warning
10 mm 991 Gs
99.1 mT
 1.28 kg / 2.81 lbs
1275.9 g / 12.5 N
 low risk
15 mm 542 Gs
54.2 mT
 0.38 kg / 0.84 lbs
381.4 g / 3.7 N
 low risk
20 mm 313 Gs
31.3 mT
 0.13 kg / 0.28 lbs
127.2 g / 1.2 N
 low risk
30 mm 125 Gs
12.5 mT
 0.02 kg / 0.04 lbs
20.4 g / 0.2 N
 low risk
50 mm 34 Gs
3.4 mT
 0.00 kg / 0.00 lbs
1.5 g / 0.0 N
 low risk
Pulling power weakens drastically with every mm of distance. Note that every additional insulation layer (e.g., contamination, paint, rust) significantly weakens the grip. Neodymiums work strongest during direct contact; gap nullifies the power. Analyze how rapidly the pull force fall, when the magnet does not adhere tightly to the steel surface. When calculating the assembly, avoid additional spacers.

Table 2: Slippage force (wall)
MW 24x6 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 2.00 kg / 4.40 lbs
1996.0 g / 19.6 N
1 mm Stal (~0.2) 1.77 kg / 3.90 lbs
1770.0 g / 17.4 N
2 mm Stal (~0.2) 1.52 kg / 3.36 lbs
1522.0 g / 14.9 N
3 mm Stal (~0.2) 1.28 kg / 2.81 lbs
1276.0 g / 12.5 N
5 mm Stal (~0.2) 0.85 kg / 1.87 lbs
846.0 g / 8.3 N
10 mm Stal (~0.2) 0.26 kg / 0.56 lbs
256.0 g / 2.5 N
15 mm Stal (~0.2) 0.08 kg / 0.17 lbs
76.0 g / 0.7 N
20 mm Stal (~0.2) 0.03 kg / 0.06 lbs
26.0 g / 0.3 N
30 mm Stal (~0.2) 0.00 kg / 0.01 lbs
4.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
The following data indicates the theoretical weight limit needed to start the slippage of the magnet vertically along a vertical metal surface (considering typical friction). This parameter depends on the air gap between the magnet and the metal.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MW 24x6 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
2.99 kg / 6.60 lbs
2994.0 g / 29.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
2.00 kg / 4.40 lbs
1996.0 g / 19.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.00 kg / 2.20 lbs
998.0 g / 9.8 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
4.99 kg / 11.00 lbs
4990.0 g / 49.0 N
When placing a magnet on a vertical wall (e.g., a car body), it will maintain only approx. 20%-30% of its maximum pull force. Gravity as well as a low friction coefficient mean that magnets slide down easier than they detach. Planning a vertical fastening? Consider that the shear force is much weaker than the maximum static pull force. On a slippery surface, the element will slip down under a much lighter cargo. Utilizing a rubberized coating can effectively raise the stability.

Table 4: Steel thickness (saturation) - sheet metal selection
MW 24x6 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 1.00 kg / 2.20 lbs
998.0 g / 9.8 N
1 mm
25%
 2.50 kg / 5.50 lbs
2495.0 g / 24.5 N
2 mm
50%
 4.99 kg / 11.00 lbs
4990.0 g / 49.0 N
3 mm
75%
 7.49 kg / 16.50 lbs
7485.0 g / 73.4 N
5 mm
100%
 9.98 kg / 22.00 lbs
9980.0 g / 97.9 N
10 mm
100%
 9.98 kg / 22.00 lbs
9980.0 g / 97.9 N
11 mm
100%
 9.98 kg / 22.00 lbs
9980.0 g / 97.9 N
12 mm
100%
 9.98 kg / 22.00 lbs
9980.0 g / 97.9 N
A thin metal plate cannot focus the entire magnetic field, which weakens actual performance of the magnet. Should you install a neodymium to a thin surface, the field will pass right through and the attraction force will be weaker. To squeeze full efficiency of this neodymium's potential, you need a suitably thick element of steel. The saturation phenomenon causes that on sheet metal structures (e.g., car bodies), the magnet shows lower pull force. We recommend selecting the steel thickness from these parameters.

Table 5: Thermal resistance (material behavior) - thermal limit
MW 24x6 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 9.98 kg / 22.00 lbs
9980.0 g / 97.9 N
 OK
40 °C -2.2% 9.76 kg / 21.52 lbs
9760.4 g / 95.7 N
 OK
60 °C -4.4% 9.54 kg / 21.03 lbs
9540.9 g / 93.6 N
80 °C -6.6% 9.32 kg / 20.55 lbs
9321.3 g / 91.4 N
100 °C -28.8% 7.11 kg / 15.67 lbs
7105.8 g / 69.7 N
Ordinary NdFeB products lose power past the thermal threshold. Protect against heat – heat can irreversibly destroy this magnet. With increasing heat, the neodymium's force temporarily decreases. Refrain from using this magnet close to heaters exceeding its working range. Ignoring the limit will lead to permanent loss of magnetic properties.
*Engineering note: Temperature resistance is determined by both grade, as well as the dimension ratios. Thin magnets (low permeance coefficient) may lose charge permanently at lower temperatures than long magnets. Warning indicator in the table indicates a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - field collision
MW 24x6 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 21.42 kg / 47.22 lbs
4 381 Gs
3.21 kg / 7.08 lbs
3213 g / 31.5 N
 N/A
1 mm 20.25 kg / 44.65 lbs
5 390 Gs
3.04 kg / 6.70 lbs
3038 g / 29.8 N
 18.23 kg / 40.19 lbs
~0 Gs
2 mm 18.99 kg / 41.86 lbs
5 218 Gs
2.85 kg / 6.28 lbs
2848 g / 27.9 N
 17.09 kg / 37.67 lbs
~0 Gs
3 mm 17.67 kg / 38.95 lbs
5 034 Gs
2.65 kg / 5.84 lbs
2650 g / 26.0 N
 15.90 kg / 35.06 lbs
~0 Gs
5 mm 15.00 kg / 33.07 lbs
4 638 Gs
2.25 kg / 4.96 lbs
2250 g / 22.1 N
 13.50 kg / 29.76 lbs
~0 Gs
10 mm 9.09 kg / 20.03 lbs
3 610 Gs
1.36 kg / 3.00 lbs
1363 g / 13.4 N
 8.18 kg / 18.03 lbs
~0 Gs
20 mm 2.74 kg / 6.04 lbs
1 982 Gs
0.41 kg / 0.91 lbs
411 g / 4.0 N
 2.46 kg / 5.43 lbs
~0 Gs
50 mm 0.10 kg / 0.23 lbs
385 Gs
0.02 kg / 0.03 lbs
15 g / 0.2 N
 0.09 kg / 0.21 lbs
~0 Gs
60 mm 0.04 kg / 0.10 lbs
251 Gs
0.01 kg / 0.01 lbs
7 g / 0.1 N
 0.04 kg / 0.09 lbs
~0 Gs
70 mm 0.02 kg / 0.04 lbs
171 Gs
0.00 kg / 0.01 lbs
3 g / 0.0 N
 0.02 kg / 0.04 lbs
~0 Gs
80 mm 0.01 kg / 0.02 lbs
121 Gs
0.00 kg / 0.00 lbs
2 g / 0.0 N
 0.01 kg / 0.02 lbs
~0 Gs
90 mm 0.01 kg / 0.01 lbs
89 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
100 mm 0.00 kg / 0.01 lbs
67 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
Two magnetic products interact from a significantly greater distance than a neodymium and metal combination. The connection of magnet-to-magnet produces a massive flux and a larger range of operation. Want to build a powerful holder? Utilize two neodymiums instead of a neodymium and a striker plate. Remember that when bringing together two magnets, the pinch force is huge. The levitation is a bit weaker than the connection force, but still impressive.
*Flux density between like poles reaches ~0 Gs at the geometric center between the magnets (resulting from vector opposition).
Attention: Figures refer to sliding force of two matching magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (electronics) - precautionary measures
MW 24x6 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 10.0 cm
Hearing aid 10 Gs (1.0 mT) 8.0 cm
Timepiece 20 Gs (2.0 mT) 6.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 5.0 cm
Remote 50 Gs (5.0 mT) 4.5 cm
Payment card 400 Gs (40.0 mT) 2.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.5 cm
A strong magnetic field is a serious hazard to electronic devices and medical implants. These neodymiums produce a flux that prevents correct functioning of sensitive medical devices. Notice: the invisible magnetic field acts through matter and plastic. Exceptional care must be exercised by people with hearing aids and drug dispensers. The risk also applies to: mechanical watches, remotes, membranes, and displays. Do not place the magnet near cards, HDD media, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - collision effects
MW 24x6 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 24.39 km/h
(6.78 m/s)
 0.47 J
30 mm 25.74 km/h
(7.15 m/s)
 0.52 J
50 mm 25.77 km/h
(7.16 m/s)
 0.52 J
100 mm 25.77 km/h
(7.16 m/s)
 0.52 J
Neodymium magnets are very brittle – a violent impact against metal causes immediate chipping. Pay attention to connection velocity – a neodymium left loose speeds with massive force. Impact energy can trigger coating fragments or dangerous crushing to skin. Be sure to control the product during mounting so it doesn't hit violently against the steel surface. A contact at a velocity of dozens of km/h means shattering of the neodymium. Wear safety glasses when playing with large magnets.

Table 9: Anti-corrosion coating durability
MW 24x6 / N38

Technical parameter Value / Description
Coating type [Zn] Zinc
Layer structure Zn (Zinc)
Layer thickness 8-15 µm
Salt spray test (SST) ? 48 h
Recommended environment Indoors / Garage
The SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Electrical data (Pc)
MW 24x6 / N38

Parameter Value SI Unit / Description
Magnetic Flux 13 932 Mx 139.3 µWb
Pc Coefficient 0.35 Low (Flat)
Flux value emitted by the pole surface. Key data when building generators as well as sensors. Pc value defines the working geometry.

Table 11: Physics of underwater searching
MW 24x6 / N38

Environment Effective steel pull Effect
Air (land) 9.98 kg Standard
Water (riverbed) 11.43 kg
(+1.45 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. Vertical hold

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

2. Steel thickness impact

*Thin steel (e.g. 0.5mm PC case) significantly reduces 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 Pc (Permeance Coefficient) = 0.35

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

Elemental analysis

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: 010048-2026
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Strengths as well as weaknesses of Nd2Fe14B magnets.

Strengths

Besides their remarkable strength, neodymium magnets offer the following advantages:
  • They virtually do not lose strength, because even after ten years the performance loss is only ~1% (in laboratory conditions),
  • They possess excellent resistance to magnetism drop when exposed to opposing magnetic fields,
  • By applying a smooth coating of silver, the element acquires an nice look,
  • Neodymium magnets achieve maximum magnetic induction on a contact point, which ensures high operational effectiveness,
  • Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to the potential of flexible forming and adaptation to unique solutions, NdFeB magnets can be produced in a wide range of geometric configurations, which makes them more universal,
  • Significant place in future technologies – they are utilized in magnetic memories, electric drive systems, precision medical tools, and other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which enables their usage in compact constructions

Limitations

Cons of neodymium magnets and ways of using them
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a strong case, which not only secures them against impacts but also raises their durability
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • We suggest a housing - magnetic holder, due to difficulties in realizing threads inside the magnet and complicated shapes.
  • Potential hazard related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child safety. Additionally, small components of these products can disrupt the diagnostic process medical when they are in the body.
  • Due to complex production process, their price is higher than average,

Holding force characteristics

Highest magnetic holding force – what it depends on?

The lifting capacity listed is a theoretical maximum value executed under the following configuration:
  • using a sheet made of low-carbon steel, functioning as a magnetic yoke
  • possessing a massiveness of min. 10 mm to avoid saturation
  • with an ground touching surface
  • under conditions of gap-free contact (metal-to-metal)
  • under vertical application of breakaway force (90-degree angle)
  • in temp. approx. 20°C

Practical aspects of lifting capacity – factors

It is worth knowing that the working load will differ influenced by the following factors, in order of importance:
  • Distance – the presence of foreign body (rust, dirt, air) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
  • Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
  • Material composition – not every steel attracts identically. Alloy additives worsen the attraction effect.
  • Surface quality – the more even the plate, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
  • Heat – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).

Lifting capacity was determined with the use of a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, whereas under parallel forces the holding force is lower. In addition, even a minimal clearance between the magnet and the plate decreases the load capacity.

H&S for magnets
Keep away from electronics

A powerful magnetic field disrupts the functioning of magnetometers in smartphones and GPS navigation. Maintain magnets close to a smartphone to avoid damaging the sensors.

No play value

Only for adults. Small elements pose a choking risk, causing serious injuries. Keep out of reach of kids and pets.

Handling guide

Before starting, read the rules. Uncontrolled attraction can destroy the magnet or hurt your hand. Think ahead.

Threat to electronics

Powerful magnetic fields can corrupt files on credit cards, HDDs, and other magnetic media. Maintain a gap of min. 10 cm.

Material brittleness

Beware of splinters. Magnets can fracture upon violent connection, launching sharp fragments into the air. We recommend safety glasses.

Health Danger

Warning for patients: Strong magnetic fields disrupt electronics. Maintain at least 30 cm distance or request help to work with the magnets.

Pinching danger

Protect your hands. Two powerful magnets will join immediately with a force of massive weight, crushing anything in their path. Be careful!

Heat warning

Standard neodymium magnets (grade N) lose power when the temperature goes above 80°C. The loss of strength is permanent.

Mechanical processing

Powder created during machining of magnets is flammable. Do not drill into magnets unless you are an expert.

Nickel coating and allergies

It is widely known that nickel (the usual finish) is a strong allergen. For allergy sufferers, refrain from direct skin contact or select versions in plastic housing.

Danger! Want to know more? Read our article: Are neodymium magnets dangerous?