e-mail: bok@dhit.pl

Neodymium magnets – most powerful on the market

Looking for huge power in small size? Our range includes rich assortment of various shapes and sizes. Best choice for home use, workshop and industrial tasks. Browse assortment available immediately.

discover magnet catalog

Magnets for underwater searches

Discover your passion with treasure salvaging! Our specialized grips (F200, F400) provide safety guarantee and huge lifting capacity. Solid, corrosion-resistant housing and reinforced ropes are reliable in rivers and lakes.

choose searching equipment

Reliable threaded grips

Professional solutions for mounting without drilling. Threaded mounts (external or internal) guarantee quick improvement of work on production halls. They are indispensable mounting lighting, detectors and banners.

check industrial applications

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

Dhit sp. z o.o.
Product available Ships tomorrow

MW 38x3.5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010062

GTIN/EAN: 5906301810612

5.00

Diameter Ø

38 mm [±0,1 mm]

Height

3.5 mm [±0,1 mm]

Weight

29.77 g

Magnetization Direction

↑ axial

Load capacity

5.09 kg / 49.91 N

Magnetic Induction

112.31 mT / 1123 Gs

Coating

[NiCuNi] Nickel

15.83 with VAT / pcs + price for transport

12.87 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
12.87 ZŁ
15.83 ZŁ
price from 50 pcs
12.10 ZŁ
14.88 ZŁ
price from 200 pcs
11.33 ZŁ
13.93 ZŁ
Need advice?

Call us +48 22 499 98 98 if you prefer drop us a message via our online form the contact section.
Lifting power along with appearance of a magnet can be verified using our force calculator.

Order by 14:00 and we’ll ship today!

Product card - MW 38x3.5 / N38 - cylindrical magnet

Specification / characteristics - MW 38x3.5 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010062
GTIN/EAN 5906301810612
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 38 mm [±0,1 mm]
Height 3.5 mm [±0,1 mm]
Weight 29.77 g
Magnetization Direction ↑ axial
Load capacity ~ ? 5.09 kg / 49.91 N
Magnetic Induction ~ ? 112.31 mT / 1123 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 38x3.5 / 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 assembly - technical parameters

The following values are the direct effect of a mathematical calculation. Results rely on algorithms for the material Nd2Fe14B. Operational conditions might slightly deviate from the simulation results. Please consider these data as a supplementary guide when designing systems.

Table 1: Static pull force (pull vs distance) - interaction chart
MW 38x3.5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg) Risk Status
0 mm 1123 Gs
112.3 mT
5.09 kg / 5090.0 g
49.9 N
strong
1 mm 1103 Gs
110.3 mT
4.91 kg / 4910.1 g
48.2 N
strong
2 mm 1075 Gs
107.5 mT
4.66 kg / 4663.0 g
45.7 N
strong
3 mm 1040 Gs
104.0 mT
4.36 kg / 4364.2 g
42.8 N
strong
5 mm 954 Gs
95.4 mT
3.67 kg / 3673.1 g
36.0 N
strong
10 mm 703 Gs
70.3 mT
2.00 kg / 1997.1 g
19.6 N
safe
15 mm 483 Gs
48.3 mT
0.94 kg / 943.2 g
9.3 N
safe
20 mm 326 Gs
32.6 mT
0.43 kg / 429.7 g
4.2 N
safe
30 mm 155 Gs
15.5 mT
0.10 kg / 97.1 g
1.0 N
safe
50 mm 47 Gs
4.7 mT
0.01 kg / 8.9 g
0.1 N
safe

Table 2: Slippage load (wall)
MW 38x3.5 / N38

Distance (mm) Friction coefficient Pull Force (kg)
0 mm Stal (~0.2) 1.02 kg / 1018.0 g
10.0 N
1 mm Stal (~0.2) 0.98 kg / 982.0 g
9.6 N
2 mm Stal (~0.2) 0.93 kg / 932.0 g
9.1 N
3 mm Stal (~0.2) 0.87 kg / 872.0 g
8.6 N
5 mm Stal (~0.2) 0.73 kg / 734.0 g
7.2 N
10 mm Stal (~0.2) 0.40 kg / 400.0 g
3.9 N
15 mm Stal (~0.2) 0.19 kg / 188.0 g
1.8 N
20 mm Stal (~0.2) 0.09 kg / 86.0 g
0.8 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

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MW 38x3.5 / N38

Surface type Friction coefficient / % Mocy Max load (kg)
Raw steel
µ = 0.3 30% Nominalnej Siły
1.53 kg / 1527.0 g
15.0 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.02 kg / 1018.0 g
10.0 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.51 kg / 509.0 g
5.0 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
2.55 kg / 2545.0 g
25.0 N

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 38x3.5 / N38

Steel thickness (mm) % power Real pull force (kg)
0.5 mm
10%
0.51 kg / 509.0 g
5.0 N
1 mm
25%
1.27 kg / 1272.5 g
12.5 N
2 mm
50%
2.55 kg / 2545.0 g
25.0 N
5 mm
100%
5.09 kg / 5090.0 g
49.9 N
10 mm
100%
5.09 kg / 5090.0 g
49.9 N

Table 5: Thermal resistance (material behavior) - thermal limit
MW 38x3.5 / N38

Ambient temp. (°C) Power loss Remaining pull Status
20 °C 0.0% 5.09 kg / 5090.0 g
49.9 N
OK
40 °C -2.2% 4.98 kg / 4978.0 g
48.8 N
OK
60 °C -4.4% 4.87 kg / 4866.0 g
47.7 N
80 °C -6.6% 4.75 kg / 4754.1 g
46.6 N
100 °C -28.8% 3.62 kg / 3624.1 g
35.6 N

Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 38x3.5 / N38

Gap (mm) Attraction (kg) (N-S) Repulsion (kg) (N-N)
0 mm 8.82 kg / 8818 g
86.5 N
2 143 Gs
N/A
1 mm 8.68 kg / 8679 g
85.1 N
2 228 Gs
7.81 kg / 7811 g
76.6 N
~0 Gs
2 mm 8.51 kg / 8507 g
83.5 N
2 206 Gs
7.66 kg / 7656 g
75.1 N
~0 Gs
3 mm 8.31 kg / 8306 g
81.5 N
2 180 Gs
7.47 kg / 7475 g
73.3 N
~0 Gs
5 mm 7.83 kg / 7829 g
76.8 N
2 116 Gs
7.05 kg / 7046 g
69.1 N
~0 Gs
10 mm 6.36 kg / 6364 g
62.4 N
1 908 Gs
5.73 kg / 5727 g
56.2 N
~0 Gs
20 mm 3.46 kg / 3460 g
33.9 N
1 407 Gs
3.11 kg / 3114 g
30.5 N
~0 Gs
50 mm 0.35 kg / 346 g
3.4 N
445 Gs
0.31 kg / 312 g
3.1 N
~0 Gs

Table 7: Hazards (implants) - precautionary measures
MW 38x3.5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 11.5 cm
Hearing aid 10 Gs (1.0 mT) 9.0 cm
Mechanical watch 20 Gs (2.0 mT) 7.0 cm
Mobile device 40 Gs (4.0 mT) 5.5 cm
Remote 50 Gs (5.0 mT) 5.0 cm
Payment card 400 Gs (40.0 mT) 2.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.5 cm

Table 8: Collisions (cracking risk) - collision effects
MW 38x3.5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 16.10 km/h
(4.47 m/s)
0.30 J
30 mm 23.11 km/h
(6.42 m/s)
0.61 J
50 mm 29.52 km/h
(8.20 m/s)
1.00 J
100 mm 41.70 km/h
(11.58 m/s)
2.00 J

Table 9: Coating parameters (durability)
MW 38x3.5 / 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: Construction data (Flux)
MW 38x3.5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 17 022 Mx 170.2 µWb
Pc Coefficient 0.14 Low (Flat)

Table 11: Hydrostatics and buoyancy
MW 38x3.5 / N38

Environment Effective steel pull Effect
Air (land) 5.09 kg Standard
Water (riverbed) 5.83 kg
(+0.74 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. Vertical hold

*Note: On a vertical wall, the magnet holds just approx. 20-30% of its max power.

2. Plate thickness effect

*Thin steel (e.g. computer case) drastically reduces the holding force.

3. Power loss vs temp

*For standard magnets, the critical limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.14

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
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%
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: 010062-2025
Quick Unit Converter
Magnet pull force

Magnetic Induction

Other offers

This product is an exceptionally strong cylindrical magnet, composed of advanced NdFeB material, which, with dimensions of Ø38x3.5 mm, guarantees maximum efficiency. The MW 38x3.5 / N38 component boasts an accuracy of ±0.1mm and professional build quality, making it a perfect solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 5.09 kg), this product is in stock from our warehouse in Poland, ensuring quick order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
This model is perfect for building electric motors, advanced sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the pull force of 49.91 N with a weight of only 29.77 g, this rod is indispensable in electronics and wherever low weight is crucial.
Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this precision component. To ensure long-term durability in industry, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most frequently chosen standard for industrial neodymium magnets, offering an optimal price-to-power ratio and operational stability. If you need the strongest magnets in the same volume (Ø38x3.5), 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 38 mm and height 3.5 mm. The value of 49.91 N means that the magnet is capable of holding a weight many times exceeding its own mass of 29.77 g. The product has a [NiCuNi] coating, which protects the surface against oxidation, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 3.5 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.

Pros and cons of rare earth magnets.

Strengths

Apart from their consistent power, neodymium magnets have these key benefits:
  • They retain attractive force for nearly 10 years – the loss is just ~1% (in theory),
  • They possess excellent resistance to weakening of magnetic properties when exposed to external magnetic sources,
  • In other words, due to the glossy surface of nickel, the element becomes visually attractive,
  • They feature high magnetic induction at the operating surface, which improves attraction properties,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Thanks to the potential of accurate shaping and adaptation to custom solutions, neodymium magnets can be modeled in a variety of geometric configurations, which expands the range of possible applications,
  • Significant place in advanced technology sectors – they are utilized in data components, drive modules, diagnostic systems, and industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in miniature devices

Limitations

Disadvantages of neodymium magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a steel housing, which not only protects them against impacts but also raises their durability
  • Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • Limited possibility of creating nuts in the magnet and complicated shapes - preferred is casing - mounting mechanism.
  • Health risk resulting from small fragments of magnets are risky, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that tiny parts of these devices can disrupt the diagnostic process medical when they are in the body.
  • Due to expensive raw materials, their price is higher than average,

Holding force characteristics

Breakaway strength of the magnet in ideal conditionswhat contributes to it?

The lifting capacity listed is a theoretical maximum value conducted under specific, ideal conditions:
  • on a base made of structural steel, perfectly concentrating the magnetic flux
  • whose thickness is min. 10 mm
  • with a surface perfectly flat
  • without any insulating layer between the magnet and steel
  • for force acting at a right angle (pull-off, not shear)
  • in stable room temperature

Determinants of lifting force in real conditions

In real-world applications, the actual lifting capacity results from several key aspects, presented from the most important:
  • Distance – the presence of any layer (paint, dirt, air) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Direction of force – maximum parameter is available only during perpendicular pulling. The shear force of the magnet along the surface is standardly many times smaller (approx. 1/5 of the lifting capacity).
  • Plate thickness – insufficiently thick plate causes magnetic saturation, causing part of the power to be escaped into the air.
  • Metal type – different alloys reacts the same. High carbon content worsen the attraction effect.
  • Smoothness – ideal contact is obtained only on smooth steel. Any scratches and bumps create air cushions, reducing force.
  • Thermal factor – high temperature reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under parallel forces the holding force is lower. Moreover, even a slight gap between the magnet’s surface and the plate lowers the lifting capacity.

Safety rules for work with NdFeB magnets
Keep away from electronics

A powerful magnetic field interferes with the operation of magnetometers in phones and GPS navigation. Keep magnets near a device to avoid breaking the sensors.

Flammability

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

Warning for allergy sufferers

Nickel alert: The nickel-copper-nickel coating consists of nickel. If skin irritation occurs, immediately stop handling magnets and use protective gear.

Do not underestimate power

Handle with care. Rare earth magnets act from a distance and connect with huge force, often quicker than you can move away.

Physical harm

Risk of injury: The pulling power is so great that it can result in blood blisters, crushing, and even bone fractures. Protective gloves are recommended.

Magnetic media

Equipment safety: Neodymium magnets can damage payment cards and delicate electronics (heart implants, medical aids, timepieces).

Power loss in heat

Monitor thermal conditions. Heating the magnet to high heat will destroy its properties and strength.

Health Danger

For implant holders: Powerful magnets affect medical devices. Maintain at least 30 cm distance or ask another person to work with the magnets.

Do not give to children

These products are not toys. Accidental ingestion of a few magnets can lead to them attracting across intestines, which poses a direct threat to life and necessitates urgent medical intervention.

Shattering risk

Protect your eyes. Magnets can fracture upon uncontrolled impact, launching shards into the air. Eye protection is mandatory.

Security! Learn more about risks in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98