Neodymium magnets: power you're looking for

Looking for huge power in small size? We offer rich assortment of disc, cylindrical and ring magnets. They are ideal for domestic applications, garage and model making. Check our offer with fast shipping.

discover price list and dimensions

Equipment for treasure hunters

Discover your passion involving underwater treasure hunting! Our specialized grips (F200, F400) provide safety guarantee and immense power. Solid, corrosion-resistant housing and reinforced ropes will perform in any water.

find your water magnet

Reliable threaded grips

Reliable solutions for fixing non-invasive. Threaded grips (external or internal) guarantee instant organization of work on production halls. Perfect for mounting lighting, sensors and banners.

check industrial applications

🚀 Lightning processing: orders by 14:00 shipped immediately!

Dhit sp. z o.o.
Product available Ships today (order by 14:00)

MW 18.9x10 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010036

GTIN/EAN: 5906301810353

5.00

Diameter Ø

18.9 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

21.04 g

Magnetization Direction

→ diametrical

Load capacity

11.68 kg / 114.54 N

Magnetic Induction

450.35 mT / 4503 Gs

Coating

[NiCuNi] Nickel

11.07 with VAT / pcs + price for transport

9.00 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
9.00 ZŁ
11.07 ZŁ
price from 100 pcs
8.46 ZŁ
10.41 ZŁ
price from 300 pcs
7.92 ZŁ
9.74 ZŁ
Hunting for a discount?

Contact us by phone +48 888 99 98 98 otherwise get in touch by means of contact form the contact page.
Weight as well as form of magnetic components can be checked using our online calculation tool.

Orders placed before 14:00 will be shipped the same business day.

Technical - MW 18.9x10 / N38 - cylindrical magnet

Specification / characteristics - MW 18.9x10 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010036
GTIN/EAN 5906301810353
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 18.9 mm [±0,1 mm]
Height 10 mm [±0,1 mm]
Weight 21.04 g
Magnetization Direction → diametrical
Load capacity ~ ? 11.68 kg / 114.54 N
Magnetic Induction ~ ? 450.35 mT / 4503 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 18.9x10 / 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

Physical simulation of the magnet - report

The following data constitute the direct effect of a physical simulation. Results are based on models for the class Nd2Fe14B. Real-world conditions might slightly differ from theoretical values. Use these data as a reference point during assembly planning.

Table 1: Static force (force vs distance) - interaction chart
MW 18.9x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4502 Gs
450.2 mT
11.68 kg / 25.75 LBS
11680.0 g / 114.6 N
crushing
1 mm 4050 Gs
405.0 mT
9.46 kg / 20.85 LBS
9455.2 g / 92.8 N
strong
2 mm 3587 Gs
358.7 mT
7.42 kg / 16.35 LBS
7416.3 g / 72.8 N
strong
3 mm 3139 Gs
313.9 mT
5.68 kg / 12.52 LBS
5678.8 g / 55.7 N
strong
5 mm 2346 Gs
234.6 mT
3.17 kg / 6.99 LBS
3172.5 g / 31.1 N
strong
10 mm 1100 Gs
110.0 mT
0.70 kg / 1.54 LBS
696.7 g / 6.8 N
weak grip
15 mm 554 Gs
55.4 mT
0.18 kg / 0.39 LBS
176.7 g / 1.7 N
weak grip
20 mm 308 Gs
30.8 mT
0.05 kg / 0.12 LBS
54.6 g / 0.5 N
weak grip
30 mm 120 Gs
12.0 mT
0.01 kg / 0.02 LBS
8.3 g / 0.1 N
weak grip
50 mm 32 Gs
3.2 mT
0.00 kg / 0.00 LBS
0.6 g / 0.0 N
weak grip

Table 2: Sliding load (wall)
MW 18.9x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 2.34 kg / 5.15 LBS
2336.0 g / 22.9 N
1 mm Stal (~0.2) 1.89 kg / 4.17 LBS
1892.0 g / 18.6 N
2 mm Stal (~0.2) 1.48 kg / 3.27 LBS
1484.0 g / 14.6 N
3 mm Stal (~0.2) 1.14 kg / 2.50 LBS
1136.0 g / 11.1 N
5 mm Stal (~0.2) 0.63 kg / 1.40 LBS
634.0 g / 6.2 N
10 mm Stal (~0.2) 0.14 kg / 0.31 LBS
140.0 g / 1.4 N
15 mm Stal (~0.2) 0.04 kg / 0.08 LBS
36.0 g / 0.4 N
20 mm Stal (~0.2) 0.01 kg / 0.02 LBS
10.0 g / 0.1 N
30 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 18.9x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
3.50 kg / 7.72 LBS
3504.0 g / 34.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
2.34 kg / 5.15 LBS
2336.0 g / 22.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.17 kg / 2.57 LBS
1168.0 g / 11.5 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
5.84 kg / 12.87 LBS
5840.0 g / 57.3 N

Table 4: Material efficiency (substrate influence) - power losses
MW 18.9x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
0.58 kg / 1.29 LBS
584.0 g / 5.7 N
1 mm
13%
1.46 kg / 3.22 LBS
1460.0 g / 14.3 N
2 mm
25%
2.92 kg / 6.44 LBS
2920.0 g / 28.6 N
3 mm
38%
4.38 kg / 9.66 LBS
4380.0 g / 43.0 N
5 mm
63%
7.30 kg / 16.09 LBS
7300.0 g / 71.6 N
10 mm
100%
11.68 kg / 25.75 LBS
11680.0 g / 114.6 N
11 mm
100%
11.68 kg / 25.75 LBS
11680.0 g / 114.6 N
12 mm
100%
11.68 kg / 25.75 LBS
11680.0 g / 114.6 N

Table 5: Thermal stability (material behavior) - thermal limit
MW 18.9x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 11.68 kg / 25.75 LBS
11680.0 g / 114.6 N
OK
40 °C -2.2% 11.42 kg / 25.18 LBS
11423.0 g / 112.1 N
OK
60 °C -4.4% 11.17 kg / 24.62 LBS
11166.1 g / 109.5 N
OK
80 °C -6.6% 10.91 kg / 24.05 LBS
10909.1 g / 107.0 N
100 °C -28.8% 8.32 kg / 18.33 LBS
8316.2 g / 81.6 N

Table 6: Two magnets (attraction) - field range
MW 18.9x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 35.05 kg / 77.28 LBS
5 600 Gs
5.26 kg / 11.59 LBS
5258 g / 51.6 N
N/A
1 mm 31.70 kg / 69.88 LBS
8 562 Gs
4.75 kg / 10.48 LBS
4754 g / 46.6 N
28.53 kg / 62.89 LBS
~0 Gs
2 mm 28.38 kg / 62.56 LBS
8 101 Gs
4.26 kg / 9.38 LBS
4256 g / 41.8 N
25.54 kg / 56.30 LBS
~0 Gs
3 mm 25.22 kg / 55.59 LBS
7 636 Gs
3.78 kg / 8.34 LBS
3782 g / 37.1 N
22.69 kg / 50.03 LBS
~0 Gs
5 mm 19.53 kg / 43.05 LBS
6 720 Gs
2.93 kg / 6.46 LBS
2929 g / 28.7 N
17.57 kg / 38.75 LBS
~0 Gs
10 mm 9.52 kg / 20.99 LBS
4 692 Gs
1.43 kg / 3.15 LBS
1428 g / 14.0 N
8.57 kg / 18.89 LBS
~0 Gs
20 mm 2.09 kg / 4.61 LBS
2 199 Gs
0.31 kg / 0.69 LBS
314 g / 3.1 N
1.88 kg / 4.15 LBS
~0 Gs
50 mm 0.06 kg / 0.13 LBS
372 Gs
0.01 kg / 0.02 LBS
9 g / 0.1 N
0.05 kg / 0.12 LBS
~0 Gs
60 mm 0.03 kg / 0.06 LBS
241 Gs
0.00 kg / 0.01 LBS
4 g / 0.0 N
0.02 kg / 0.05 LBS
~0 Gs
70 mm 0.01 kg / 0.03 LBS
164 Gs
0.00 kg / 0.00 LBS
2 g / 0.0 N
0.01 kg / 0.02 LBS
~0 Gs
80 mm 0.01 kg / 0.01 LBS
116 Gs
0.00 kg / 0.00 LBS
1 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
90 mm 0.00 kg / 0.01 LBS
86 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
100 mm 0.00 kg / 0.00 LBS
65 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs

Table 7: Safety (HSE) (implants) - warnings
MW 18.9x10 / 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
Mechanical watch 20 Gs (2.0 mT) 6.0 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

Table 8: Dynamics (cracking risk) - collision effects
MW 18.9x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 24.63 km/h
(6.84 m/s)
0.49 J
30 mm 41.18 km/h
(11.44 m/s)
1.38 J
50 mm 53.13 km/h
(14.76 m/s)
2.29 J
100 mm 75.14 km/h
(20.87 m/s)
4.58 J

Table 9: Surface protection spec
MW 18.9x10 / 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: Electrical data (Flux)
MW 18.9x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 12 775 Mx 127.7 µWb
Pc Coefficient 0.61 High (Stable)

Table 11: Underwater work (magnet fishing)
MW 18.9x10 / N38

Environment Effective steel pull Effect
Air (land) 11.68 kg Standard
Water (riverbed) 13.37 kg
(+1.69 kg buoyancy gain)
+14.5%
Warning: 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 merely ~20% of its max power.

2. Steel thickness impact

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

3. Temperature resistance

*For N38 material, the max working temp is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.61

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%
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: 010036-2026
Magnet Unit Converter
Force (pull)

Magnetic Induction

Other proposals

The presented product is a very strong rod magnet, composed of advanced NdFeB material, which, with dimensions of Ø18.9x10 mm, guarantees the highest energy density. The MW 18.9x10 / N38 model boasts an accuracy of ±0.1mm and industrial build quality, making it a perfect solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 11.68 kg), this product is in stock from our European logistics center, ensuring rapid order fulfillment. Moreover, its Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is perfect for building electric motors, advanced Hall effect sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the pull force of 114.54 N with a weight of only 21.04 g, this rod 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 long-term durability in industry, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need even stronger magnets in the same volume (Ø18.9x10), 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 18.9 mm and height 10 mm. The value of 114.54 N means that the magnet is capable of holding a weight many times exceeding its own mass of 21.04 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. 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 rare earth magnets.

Pros

Apart from their superior magnetism, neodymium magnets have these key benefits:
  • They retain full power for around ten years – the loss is just ~1% (according to analyses),
  • Neodymium magnets are characterized by exceptionally resistant to magnetic field loss caused by magnetic disturbances,
  • In other words, due to the smooth surface of silver, the element is aesthetically pleasing,
  • They are known for high magnetic induction at the operating surface, which improves attraction properties,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
  • Thanks to freedom in forming and the ability to adapt to individual projects,
  • Huge importance in modern technologies – they serve a role in hard drives, drive modules, precision medical tools, and complex engineering applications.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Cons

Disadvantages of NdFeB magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a steel housing, which not only protects them against impacts but also raises their durability
  • When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
  • We suggest casing - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complicated forms.
  • Health risk to health – tiny shards of magnets can be dangerous, if swallowed, which becomes key in the context of child health protection. Additionally, tiny parts of these devices are able to be problematic in diagnostics medical in case of swallowing.
  • Due to expensive raw materials, their price is relatively high,

Pull force analysis

Best holding force of the magnet in ideal parameterswhat it depends on?

The declared magnet strength refers to the limit force, measured under ideal test conditions, meaning:
  • with the use of a sheet made of low-carbon steel, ensuring full magnetic saturation
  • possessing a thickness of min. 10 mm to ensure full flux closure
  • with a surface free of scratches
  • with direct contact (no coatings)
  • during detachment in a direction perpendicular to the plane
  • at room temperature

Practical lifting capacity: influencing factors

Holding efficiency is influenced by working environment parameters, mainly (from priority):
  • Clearance – existence of foreign body (rust, dirt, air) interrupts the magnetic circuit, which lowers power steeply (even by 50% at 0.5 mm).
  • Angle of force application – highest force is reached only during perpendicular pulling. The shear force of the magnet along the plate is standardly several times lower (approx. 1/5 of the lifting capacity).
  • Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of generating force.
  • Material composition – not every steel reacts the same. Alloy additives worsen the attraction effect.
  • Surface condition – ground elements guarantee perfect abutment, which improves force. Rough surfaces reduce efficiency.
  • Thermal environment – temperature increase causes a temporary drop of induction. Check the maximum operating temperature for a given model.

Lifting capacity was determined by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular pulling force, however under shearing force the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate lowers the load capacity.

Warnings
Data carriers

Avoid bringing magnets near a purse, laptop, or screen. The magnetism can irreversibly ruin these devices and erase data from cards.

Bone fractures

Big blocks can crush fingers in a fraction of a second. Never put your hand between two strong magnets.

Keep away from children

Strictly store magnets away from children. Ingestion danger is significant, and the effects of magnets clamping inside the body are very dangerous.

Life threat

People with a heart stimulator must maintain an safe separation from magnets. The magnetic field can stop the operation of the implant.

Shattering risk

Neodymium magnets are sintered ceramics, which means they are fragile like glass. Collision of two magnets leads to them breaking into small pieces.

Allergy Warning

Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If skin irritation appears, immediately stop working with magnets and use protective gear.

Threat to navigation

Be aware: rare earth magnets produce a field that disrupts sensitive sensors. Maintain a safe distance from your phone, device, and GPS.

Handling rules

Use magnets consciously. Their immense force can shock even experienced users. Plan your moves and do not underestimate their force.

Fire risk

Fire warning: Neodymium dust is highly flammable. Avoid machining magnets in home conditions as this risks ignition.

Maximum temperature

Keep cool. NdFeB magnets are sensitive to heat. If you need operation above 80°C, ask us about special high-temperature series (H, SH, UH).

Caution! More info about hazards in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98