Product available Ships tomorrow CO2 GPSR PPWR REACH

MW 8x1.5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010101

GTIN/EAN: 5906301811008

5.00
Load capacity 0.74 kg / 7.27 N Magnetic Induction 217.52 mT / 2175 Gs
Diameter Ø
8 mm [±0,1 mm]
Height
1.5 mm [±0,1 mm]
Weight
0.57 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

0.370net / pcs

0.455 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

Need more?

Quantity
Net
Gross
price from 1 pcs
0.370 zł
0.455 zł
price from 1700 pcs
0.348 zł
0.428 zł
price from 6800 pcs
0.326 zł
0.400 zł

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.

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.

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.

Order by 14:00 and we’ll ship today!

Technical data of the product - MW 8x1.5 / N38 - cylindrical magnet

Specification / characteristics - MW 8x1.5 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010101
GTIN/EAN 5906301811008
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 1.5 mm [±0,1 mm]
Weight 0.57 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.74 kg / 7.27 N
Magnetic Induction ~ ? 217.52 mT / 2175 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 8x1.5 / 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 analysis of the assembly - data

These values are the direct effect of a physical calculation. Values rely on algorithms for the material Nd2Fe14B. Operational performance might slightly deviate from the simulation results. Please consider these calculations as a reference point for designers.

Table 1: Static pull force (pull vs gap) - power drop
MW 8x1.5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2174 Gs
217.4 mT
0.74 kg / 1.63 pounds
740.0 g / 7.3 N
weak grip
1 mm 1782 Gs
178.2 mT
0.50 kg / 1.10 pounds
497.3 g / 4.9 N
weak grip
2 mm 1310 Gs
131.0 mT
0.27 kg / 0.59 pounds
268.7 g / 2.6 N
weak grip
3 mm 914 Gs
91.4 mT
0.13 kg / 0.29 pounds
130.8 g / 1.3 N
weak grip
5 mm 439 Gs
43.9 mT
0.03 kg / 0.07 pounds
30.2 g / 0.3 N
weak grip
10 mm 99 Gs
9.9 mT
0.00 kg / 0.00 pounds
1.5 g / 0.0 N
weak grip
15 mm 35 Gs
3.5 mT
0.00 kg / 0.00 pounds
0.2 g / 0.0 N
weak grip
20 mm 16 Gs
1.6 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip
30 mm 5 Gs
0.5 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip
50 mm 1 Gs
0.1 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip

Table 2: Slippage force (vertical surface)
MW 8x1.5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.15 kg / 0.33 pounds
148.0 g / 1.5 N
1 mm Stal (~0.2) 0.10 kg / 0.22 pounds
100.0 g / 1.0 N
2 mm Stal (~0.2) 0.05 kg / 0.12 pounds
54.0 g / 0.5 N
3 mm Stal (~0.2) 0.03 kg / 0.06 pounds
26.0 g / 0.3 N
5 mm Stal (~0.2) 0.01 kg / 0.01 pounds
6.0 g / 0.1 N
10 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MW 8x1.5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.22 kg / 0.49 pounds
222.0 g / 2.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.15 kg / 0.33 pounds
148.0 g / 1.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.07 kg / 0.16 pounds
74.0 g / 0.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.37 kg / 0.82 pounds
370.0 g / 3.6 N

Table 4: Steel thickness (saturation) - sheet metal selection
MW 8x1.5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.07 kg / 0.16 pounds
74.0 g / 0.7 N
1 mm
25%
0.19 kg / 0.41 pounds
185.0 g / 1.8 N
2 mm
50%
0.37 kg / 0.82 pounds
370.0 g / 3.6 N
3 mm
75%
0.55 kg / 1.22 pounds
555.0 g / 5.4 N
5 mm
100%
0.74 kg / 1.63 pounds
740.0 g / 7.3 N
10 mm
100%
0.74 kg / 1.63 pounds
740.0 g / 7.3 N
11 mm
100%
0.74 kg / 1.63 pounds
740.0 g / 7.3 N
12 mm
100%
0.74 kg / 1.63 pounds
740.0 g / 7.3 N

Table 5: Working in heat (material behavior) - thermal limit
MW 8x1.5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.74 kg / 1.63 pounds
740.0 g / 7.3 N
OK
40 °C -2.2% 0.72 kg / 1.60 pounds
723.7 g / 7.1 N
OK
60 °C -4.4% 0.71 kg / 1.56 pounds
707.4 g / 6.9 N
80 °C -6.6% 0.69 kg / 1.52 pounds
691.2 g / 6.8 N
100 °C -28.8% 0.53 kg / 1.16 pounds
526.9 g / 5.2 N

Table 6: Two magnets (repulsion) - forces in the system
MW 8x1.5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 1.46 kg / 3.23 pounds
3 712 Gs
0.22 kg / 0.48 pounds
220 g / 2.2 N
N/A
1 mm 1.24 kg / 2.74 pounds
4 007 Gs
0.19 kg / 0.41 pounds
187 g / 1.8 N
1.12 kg / 2.47 pounds
~0 Gs
2 mm 0.98 kg / 2.17 pounds
3 565 Gs
0.15 kg / 0.33 pounds
148 g / 1.4 N
0.89 kg / 1.95 pounds
~0 Gs
3 mm 0.74 kg / 1.63 pounds
3 086 Gs
0.11 kg / 0.24 pounds
111 g / 1.1 N
0.66 kg / 1.46 pounds
~0 Gs
5 mm 0.37 kg / 0.82 pounds
2 196 Gs
0.06 kg / 0.12 pounds
56 g / 0.5 N
0.34 kg / 0.74 pounds
~0 Gs
10 mm 0.06 kg / 0.13 pounds
878 Gs
0.01 kg / 0.02 pounds
9 g / 0.1 N
0.05 kg / 0.12 pounds
~0 Gs
20 mm 0.00 kg / 0.01 pounds
199 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
17 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
60 mm 0.00 kg / 0.00 pounds
10 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.00 pounds
6 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
4 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.00 pounds
3 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.00 pounds
2 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Protective zones (electronics) - precautionary measures
MW 8x1.5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 3.0 cm
Hearing aid 10 Gs (1.0 mT) 2.5 cm
Timepiece 20 Gs (2.0 mT) 2.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 1.5 cm
Remote 50 Gs (5.0 mT) 1.5 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 0.5 cm

Table 8: Dynamics (cracking risk) - collision effects
MW 8x1.5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 24.77 km/h
(6.88 m/s)
0.01 J
30 mm 24.80 km/h
(6.89 m/s)
0.01 J
50 mm 24.80 km/h
(6.89 m/s)
0.01 J
100 mm 24.80 km/h
(6.89 m/s)
0.01 J

Table 9: Surface protection spec
MW 8x1.5 / 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 (Pc)
MW 8x1.5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 1 285 Mx 12.9 µWb
Pc Coefficient 0.27 Low (Flat)

Table 11: Submerged application
MW 8x1.5 / N38

Environment Effective steel pull Effect
Air (land) 0.74 kg Standard
Water (riverbed) 0.85 kg
(+0.11 kg buoyancy gain)
+14.5%
Corrosion warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.

1. Sliding resistance

*Caution: On a vertical wall, the magnet retains just a fraction of its perpendicular strength.

2. Steel saturation

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

3. Thermal stability

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.27

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%

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: 010101-2026
Magnet Unit Converter

Magnet pull force


Magnetic Induction

Other deals

The offered product is an exceptionally strong cylinder magnet, produced from modern NdFeB material, which, at dimensions of Ø8x1.5 mm, guarantees the highest energy density. The MW 8x1.5 / N38 model is characterized by high dimensional repeatability and industrial build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 0.74 kg), this product is in stock from our warehouse in Poland, ensuring lightning-fast order fulfillment. Additionally, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring 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 7.27 N with a weight of only 0.57 g, this rod is indispensable in miniature devices and wherever every gram matters.
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., 8.1 mm) using two-component epoxy glues. To ensure stability in automation, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most frequently chosen standard for industrial neodymium magnets, offering a great economic balance and operational stability. If you need even stronger magnets in the same volume (Ø8x1.5), 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 1.5 mm. The key parameter here is the lifting capacity amounting to approximately 0.74 kg (force ~7.27 N), which, with such compact dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which secures it 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 8 mm. 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.

Advantages and disadvantages of rare earth magnets.

Benefits

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • Their power remains stable, and after approximately 10 years it drops only by ~1% (theoretically),
  • They have excellent resistance to weakening of magnetic properties due to external magnetic sources,
  • Thanks to the metallic finish, the coating of Ni-Cu-Ni, gold, or silver-plated gives an clean appearance,
  • Neodymium magnets achieve maximum magnetic induction on a small area, which increases force concentration,
  • 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...
  • Thanks to freedom in forming and the capacity to adapt to individual projects,
  • Significant place in modern industrial fields – they are used in mass storage devices, motor assemblies, medical equipment, also technologically advanced constructions.
  • Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Weaknesses

Problematic aspects of neodymium magnets: application proposals
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only shields the magnet but also increases its resistance to damage
  • We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • They rust in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in producing nuts and complicated forms in magnets, we propose using a housing - magnetic holder.
  • Health risk to health – tiny shards of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child health protection. Additionally, small elements of these products can be problematic in diagnostics medical after entering the body.
  • With large orders the cost of neodymium magnets can be a barrier,

Pull force analysis

Maximum holding power of the magnet – what it depends on?

The force parameter is a theoretical maximum value conducted under specific, ideal conditions:
  • with the contact of a sheet made of special test steel, guaranteeing full magnetic saturation
  • with a cross-section of at least 10 mm
  • with a plane cleaned and smooth
  • with direct contact (no impurities)
  • for force applied at a right angle (pull-off, not shear)
  • in stable room temperature

Determinants of lifting force in real conditions

Effective lifting capacity impacted by specific conditions, mainly (from most important):
  • Gap between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Loading method – catalog parameter refers to detachment vertically. When applying parallel force, the magnet holds much less (often approx. 20-30% of maximum force).
  • Metal thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Plate material – mild steel gives the best results. Higher carbon content reduce magnetic properties and lifting capacity.
  • Plate texture – smooth surfaces guarantee perfect abutment, which increases force. Uneven metal weaken the grip.
  • Thermal environment – temperature increase causes a temporary drop of induction. Check the thermal limit for a given model.

Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the holding force is lower. In addition, even a small distance between the magnet and the plate decreases the lifting capacity.

Precautions when working with NdFeB magnets
Health Danger

People with a heart stimulator must keep an large gap from magnets. The magnetism can interfere with the operation of the implant.

Hand protection

Protect your hands. Two powerful magnets will snap together immediately with a force of several hundred kilograms, crushing anything in their path. Be careful!

Permanent damage

Regular neodymium magnets (N-type) lose magnetization when the temperature surpasses 80°C. This process is irreversible.

Safe operation

Be careful. Rare earth magnets act from a long distance and snap with massive power, often quicker than you can move away.

Allergy Warning

Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If skin irritation happens, cease working with magnets and wear gloves.

Threat to electronics

Do not bring magnets near a purse, computer, or screen. The magnetic field can destroy these devices and wipe information from cards.

Danger to the youngest

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

Eye protection

Neodymium magnets are ceramic materials, meaning they are very brittle. Clashing of two magnets leads to them cracking into small pieces.

Threat to navigation

Note: neodymium magnets generate a field that disrupts precision electronics. Maintain a separation from your phone, tablet, and GPS.

Flammability

Fire hazard: Rare earth powder is explosive. Do not process magnets without safety gear as this risks ignition.

Warning! Need more info? Read our article: Why are neodymium magnets dangerous?