Product available Ships tomorrow

MW 8x5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010105

GTIN/EAN: 5906301811046

5.00

Diameter Ø

8 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

1.88 g

Magnetization Direction

↑ axial

Load capacity

2.17 kg / 21.31 N

Magnetic Induction

483.41 mT / 4834 Gs

Coating

[NiCuNi] Nickel

0.836 with VAT / pcs + price for transport

0.680 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
0.680 ZŁ
0.836 ZŁ
price from 900 pcs
0.639 ZŁ
0.786 ZŁ
price from 3700 pcs
0.598 ZŁ
0.736 ZŁ
Not sure what to buy?

Pick up the phone and ask +48 888 99 98 98 if you prefer get in touch via our online form the contact form page.
Weight along with appearance of magnetic components can be reviewed using our modular calculator.

Same-day processing for orders placed before 14:00.

Physical properties - MW 8x5 / N38 - cylindrical magnet

Specification / characteristics - MW 8x5 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010105
GTIN/EAN 5906301811046
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 8 mm [±0,1 mm]
Height 5 mm [±0,1 mm]
Weight 1.88 g
Magnetization Direction ↑ axial
Load capacity ~ ? 2.17 kg / 21.31 N
Magnetic Induction ~ ? 483.41 mT / 4834 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 8x5 / 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

Engineering simulation of the product - data

The following values constitute the outcome of a engineering calculation. Results were calculated on models for the class Nd2Fe14B. Real-world conditions may differ from theoretical values. Please consider these calculations as a preliminary roadmap for designers.

Table 1: Static pull force (force vs gap) - characteristics
MW 8x5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4830 Gs
483.0 mT
2.17 kg / 4.78 LBS
2170.0 g / 21.3 N
medium risk
1 mm 3655 Gs
365.5 mT
1.24 kg / 2.74 LBS
1242.8 g / 12.2 N
weak grip
2 mm 2610 Gs
261.0 mT
0.63 kg / 1.40 LBS
633.9 g / 6.2 N
weak grip
3 mm 1825 Gs
182.5 mT
0.31 kg / 0.68 LBS
310.0 g / 3.0 N
weak grip
5 mm 915 Gs
91.5 mT
0.08 kg / 0.17 LBS
77.9 g / 0.8 N
weak grip
10 mm 234 Gs
23.4 mT
0.01 kg / 0.01 LBS
5.1 g / 0.1 N
weak grip
15 mm 89 Gs
8.9 mT
0.00 kg / 0.00 LBS
0.7 g / 0.0 N
weak grip
20 mm 43 Gs
4.3 mT
0.00 kg / 0.00 LBS
0.2 g / 0.0 N
weak grip
30 mm 14 Gs
1.4 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
weak grip
50 mm 3 Gs
0.3 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
weak grip

Table 2: Sliding force (wall)
MW 8x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.43 kg / 0.96 LBS
434.0 g / 4.3 N
1 mm Stal (~0.2) 0.25 kg / 0.55 LBS
248.0 g / 2.4 N
2 mm Stal (~0.2) 0.13 kg / 0.28 LBS
126.0 g / 1.2 N
3 mm Stal (~0.2) 0.06 kg / 0.14 LBS
62.0 g / 0.6 N
5 mm Stal (~0.2) 0.02 kg / 0.04 LBS
16.0 g / 0.2 N
10 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N

Table 3: Wall mounting (shearing) - vertical pull
MW 8x5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.65 kg / 1.44 LBS
651.0 g / 6.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.43 kg / 0.96 LBS
434.0 g / 4.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.22 kg / 0.48 LBS
217.0 g / 2.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.09 kg / 2.39 LBS
1085.0 g / 10.6 N

Table 4: Material efficiency (substrate influence) - power losses
MW 8x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.22 kg / 0.48 LBS
217.0 g / 2.1 N
1 mm
25%
0.54 kg / 1.20 LBS
542.5 g / 5.3 N
2 mm
50%
1.09 kg / 2.39 LBS
1085.0 g / 10.6 N
3 mm
75%
1.63 kg / 3.59 LBS
1627.5 g / 16.0 N
5 mm
100%
2.17 kg / 4.78 LBS
2170.0 g / 21.3 N
10 mm
100%
2.17 kg / 4.78 LBS
2170.0 g / 21.3 N
11 mm
100%
2.17 kg / 4.78 LBS
2170.0 g / 21.3 N
12 mm
100%
2.17 kg / 4.78 LBS
2170.0 g / 21.3 N

Table 5: Thermal resistance (stability) - resistance threshold
MW 8x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 2.17 kg / 4.78 LBS
2170.0 g / 21.3 N
OK
40 °C -2.2% 2.12 kg / 4.68 LBS
2122.3 g / 20.8 N
OK
60 °C -4.4% 2.07 kg / 4.57 LBS
2074.5 g / 20.4 N
OK
80 °C -6.6% 2.03 kg / 4.47 LBS
2026.8 g / 19.9 N
100 °C -28.8% 1.55 kg / 3.41 LBS
1545.0 g / 15.2 N

Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 8x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 7.23 kg / 15.94 LBS
5 742 Gs
1.08 kg / 2.39 LBS
1084 g / 10.6 N
N/A
1 mm 5.58 kg / 12.31 LBS
8 490 Gs
0.84 kg / 1.85 LBS
838 g / 8.2 N
5.03 kg / 11.08 LBS
~0 Gs
2 mm 4.14 kg / 9.13 LBS
7 310 Gs
0.62 kg / 1.37 LBS
621 g / 6.1 N
3.73 kg / 8.21 LBS
~0 Gs
3 mm 2.98 kg / 6.58 LBS
6 207 Gs
0.45 kg / 0.99 LBS
448 g / 4.4 N
2.69 kg / 5.92 LBS
~0 Gs
5 mm 1.48 kg / 3.26 LBS
4 369 Gs
0.22 kg / 0.49 LBS
222 g / 2.2 N
1.33 kg / 2.93 LBS
~0 Gs
10 mm 0.26 kg / 0.57 LBS
1 830 Gs
0.04 kg / 0.09 LBS
39 g / 0.4 N
0.23 kg / 0.51 LBS
~0 Gs
20 mm 0.02 kg / 0.04 LBS
468 Gs
0.00 kg / 0.01 LBS
3 g / 0.0 N
0.02 kg / 0.03 LBS
~0 Gs
50 mm 0.00 kg / 0.00 LBS
47 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
60 mm 0.00 kg / 0.00 LBS
29 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
70 mm 0.00 kg / 0.00 LBS
19 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
80 mm 0.00 kg / 0.00 LBS
13 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
90 mm 0.00 kg / 0.00 LBS
9 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
7 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs

Table 7: Protective zones (implants) - warnings
MW 8x5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 4.5 cm
Hearing aid 10 Gs (1.0 mT) 3.5 cm
Timepiece 20 Gs (2.0 mT) 3.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.5 cm
Remote 50 Gs (5.0 mT) 2.0 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Dynamics (cracking risk) - warning
MW 8x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 34.31 km/h
(9.53 m/s)
0.09 J
30 mm 59.35 km/h
(16.49 m/s)
0.26 J
50 mm 76.62 km/h
(21.28 m/s)
0.43 J
100 mm 108.35 km/h
(30.10 m/s)
0.85 J

Table 9: Corrosion resistance
MW 8x5 / 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 8x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 2 450 Mx 24.5 µWb
Pc Coefficient 0.68 High (Stable)

Table 11: Underwater work (magnet fishing)
MW 8x5 / N38

Environment Effective steel pull Effect
Air (land) 2.17 kg Standard
Water (riverbed) 2.48 kg
(+0.31 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 wall, the magnet retains just ~20% of its perpendicular strength.

2. Plate thickness effect

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

3. Thermal stability

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.68

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 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 and environmental data
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: 010105-2026
Quick Unit Converter
Force (pull)

Field Strength

Other deals

This product is an incredibly powerful cylinder magnet, manufactured from durable NdFeB material, which, at dimensions of Ø8x5 mm, guarantees maximum efficiency. This specific item boasts high dimensional repeatability and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 2.17 kg), this product is in stock from our warehouse in Poland, ensuring quick order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
It successfully proves itself in DIY projects, advanced robotics, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 21.31 N with a weight of only 1.88 g, this rod is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 8.1 mm) using two-component epoxy glues. To ensure long-term durability in automation, anaerobic resins are used, which are safe for nickel 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 extreme miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø8x5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 8 mm and height 5 mm. The value of 21.31 N means that the magnet is capable of holding a weight many times exceeding its own mass of 1.88 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 5 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.

Strengths and weaknesses of neodymium magnets.

Pros

Apart from their consistent holding force, neodymium magnets have these key benefits:
  • They have unchanged lifting capacity, and over more than 10 years their performance decreases symbolically – ~1% (according to theory),
  • They have excellent resistance to magnetism drop due to external magnetic sources,
  • Thanks to the shiny finish, the coating of nickel, gold, or silver-plated gives an elegant appearance,
  • Neodymium magnets generate maximum magnetic induction on a contact point, which allows for strong attraction,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Possibility of individual creating as well as optimizing to specific conditions,
  • Universal use in modern technologies – they serve a role in data components, electric motors, diagnostic systems, and modern systems.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Disadvantages

Disadvantages of NdFeB magnets:
  • They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only shields the magnet but also increases its resistance to damage
  • Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • We suggest a housing - magnetic holder, due to difficulties in creating nuts inside the magnet and complicated forms.
  • Potential hazard resulting from small fragments of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child health protection. Furthermore, tiny parts of these magnets are able to complicate diagnosis medical when they are in the body.
  • Due to neodymium price, their price exceeds standard values,

Pull force analysis

Maximum lifting capacity of the magnetwhat affects it?

Breakaway force was defined for the most favorable conditions, assuming:
  • using a sheet made of low-carbon steel, acting as a magnetic yoke
  • possessing a thickness of minimum 10 mm to ensure full flux closure
  • characterized by even structure
  • under conditions of no distance (metal-to-metal)
  • for force applied at a right angle (in the magnet axis)
  • in stable room temperature

Lifting capacity in real conditions – factors

During everyday use, the actual lifting capacity results from several key aspects, presented from crucial:
  • Distance (between the magnet and the metal), since even a microscopic distance (e.g. 0.5 mm) leads to a reduction in force by up to 50% (this also applies to varnish, rust or dirt).
  • Loading method – catalog parameter refers to pulling vertically. When attempting to slide, the magnet holds much less (often approx. 20-30% of nominal force).
  • Substrate thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Steel type – mild steel gives the best results. Alloy admixtures reduce magnetic properties and lifting capacity.
  • Surface condition – smooth surfaces ensure maximum contact, which improves force. Rough surfaces reduce efficiency.
  • Temperature – heating the magnet results in weakening of force. It is worth remembering the thermal limit for a given model.

Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the load capacity is reduced by as much as 75%. Moreover, even a slight gap between the magnet and the plate lowers the lifting capacity.

Safety rules for work with NdFeB magnets
Phone sensors

Navigation devices and smartphones are extremely susceptible to magnetic fields. Direct contact with a powerful NdFeB magnet can decalibrate the sensors in your phone.

Electronic devices

Data protection: Strong magnets can ruin data carriers and delicate electronics (pacemakers, hearing aids, timepieces).

Choking Hazard

Absolutely keep magnets out of reach of children. Risk of swallowing is high, and the effects of magnets clamping inside the body are very dangerous.

Avoid contact if allergic

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If redness occurs, immediately stop working with magnets and wear gloves.

Protective goggles

Watch out for shards. Magnets can explode upon violent connection, launching sharp fragments into the air. Wear goggles.

Implant safety

Patients with a heart stimulator must maintain an large gap from magnets. The magnetic field can stop the operation of the life-saving device.

Operating temperature

Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will destroy its properties and pulling force.

Flammability

Fire hazard: Neodymium dust is highly flammable. Do not process magnets in home conditions as this risks ignition.

Conscious usage

Handle with care. Rare earth magnets act from a long distance and connect with massive power, often quicker than you can react.

Crushing risk

Large magnets can break fingers in a fraction of a second. Do not place your hand between two attracting surfaces.

Security! More info about hazards in the article: Magnet Safety Guide.