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MW 70x50 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010496

GTIN/EAN: 5906301811145

Diameter Ø

70 mm [±0,1 mm]

Height

50 mm [±0,1 mm]

Weight

1443.17 g

Magnetization Direction

↑ axial

Load capacity

168.21 kg / 1650.14 N

Magnetic Induction

507.83 mT / 5078 Gs

Coating

[NiCuNi] Nickel

516.60 with VAT / pcs + price for transport

420.00 ZŁ net + 23% VAT / pcs

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Technical - MW 70x50 / N38 - cylindrical magnet

Specification / characteristics - MW 70x50 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010496
GTIN/EAN 5906301811145
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 70 mm [±0,1 mm]
Height 50 mm [±0,1 mm]
Weight 1443.17 g
Magnetization Direction ↑ axial
Load capacity ~ ? 168.21 kg / 1650.14 N
Magnetic Induction ~ ? 507.83 mT / 5078 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 70x50 / 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 modeling of the product - report

These information are the outcome of a engineering analysis. Results rely on algorithms for the class Nd2Fe14B. Operational parameters might slightly differ from theoretical values. Treat these data as a supplementary guide for designers.

Table 1: Static pull force (pull vs gap) - power drop
MW 70x50 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5078 Gs
507.8 mT
168.21 kg / 370.84 LBS
168210.0 g / 1650.1 N
critical level
1 mm 4935 Gs
493.5 mT
158.88 kg / 350.26 LBS
158876.4 g / 1558.6 N
critical level
2 mm 4790 Gs
479.0 mT
149.67 kg / 329.96 LBS
149666.1 g / 1468.2 N
critical level
3 mm 4644 Gs
464.4 mT
140.71 kg / 310.21 LBS
140708.8 g / 1380.4 N
critical level
5 mm 4354 Gs
435.4 mT
123.67 kg / 272.64 LBS
123667.4 g / 1213.2 N
critical level
10 mm 3652 Gs
365.2 mT
87.02 kg / 191.84 LBS
87016.1 g / 853.6 N
critical level
15 mm 3017 Gs
301.7 mT
59.37 kg / 130.88 LBS
59366.6 g / 582.4 N
critical level
20 mm 2469 Gs
246.9 mT
39.78 kg / 87.70 LBS
39781.3 g / 390.3 N
critical level
30 mm 1645 Gs
164.5 mT
17.66 kg / 38.93 LBS
17659.3 g / 173.2 N
critical level
50 mm 773 Gs
77.3 mT
3.89 kg / 8.59 LBS
3895.0 g / 38.2 N
strong

Table 2: Shear force (wall)
MW 70x50 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 33.64 kg / 74.17 LBS
33642.0 g / 330.0 N
1 mm Stal (~0.2) 31.78 kg / 70.05 LBS
31776.0 g / 311.7 N
2 mm Stal (~0.2) 29.93 kg / 65.99 LBS
29934.0 g / 293.7 N
3 mm Stal (~0.2) 28.14 kg / 62.04 LBS
28142.0 g / 276.1 N
5 mm Stal (~0.2) 24.73 kg / 54.53 LBS
24734.0 g / 242.6 N
10 mm Stal (~0.2) 17.40 kg / 38.37 LBS
17404.0 g / 170.7 N
15 mm Stal (~0.2) 11.87 kg / 26.18 LBS
11874.0 g / 116.5 N
20 mm Stal (~0.2) 7.96 kg / 17.54 LBS
7956.0 g / 78.0 N
30 mm Stal (~0.2) 3.53 kg / 7.79 LBS
3532.0 g / 34.6 N
50 mm Stal (~0.2) 0.78 kg / 1.72 LBS
778.0 g / 7.6 N

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 70x50 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
50.46 kg / 111.25 LBS
50463.0 g / 495.0 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
33.64 kg / 74.17 LBS
33642.0 g / 330.0 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
16.82 kg / 37.08 LBS
16821.0 g / 165.0 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
84.11 kg / 185.42 LBS
84105.0 g / 825.1 N

Table 4: Material efficiency (substrate influence) - power losses
MW 70x50 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
3%
5.61 kg / 12.36 LBS
5607.0 g / 55.0 N
1 mm
8%
14.02 kg / 30.90 LBS
14017.5 g / 137.5 N
2 mm
17%
28.03 kg / 61.81 LBS
28035.0 g / 275.0 N
3 mm
25%
42.05 kg / 92.71 LBS
42052.5 g / 412.5 N
5 mm
42%
70.09 kg / 154.52 LBS
70087.5 g / 687.6 N
10 mm
83%
140.18 kg / 309.03 LBS
140175.0 g / 1375.1 N
11 mm
92%
154.19 kg / 339.94 LBS
154192.5 g / 1512.6 N
12 mm
100%
168.21 kg / 370.84 LBS
168210.0 g / 1650.1 N

Table 5: Thermal stability (material behavior) - resistance threshold
MW 70x50 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 168.21 kg / 370.84 LBS
168210.0 g / 1650.1 N
OK
40 °C -2.2% 164.51 kg / 362.68 LBS
164509.4 g / 1613.8 N
OK
60 °C -4.4% 160.81 kg / 354.52 LBS
160808.8 g / 1577.5 N
OK
80 °C -6.6% 157.11 kg / 346.36 LBS
157108.1 g / 1541.2 N
100 °C -28.8% 119.77 kg / 264.04 LBS
119765.5 g / 1174.9 N

Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 70x50 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 611.75 kg / 1348.67 LBS
5 850 Gs
91.76 kg / 202.30 LBS
91762 g / 900.2 N
N/A
1 mm 594.86 kg / 1311.43 LBS
10 014 Gs
89.23 kg / 196.72 LBS
89229 g / 875.3 N
535.37 kg / 1180.29 LBS
~0 Gs
2 mm 577.80 kg / 1273.84 LBS
9 870 Gs
86.67 kg / 191.08 LBS
86670 g / 850.2 N
520.02 kg / 1146.45 LBS
~0 Gs
3 mm 560.95 kg / 1236.68 LBS
9 725 Gs
84.14 kg / 185.50 LBS
84142 g / 825.4 N
504.85 kg / 1113.01 LBS
~0 Gs
5 mm 527.90 kg / 1163.81 LBS
9 434 Gs
79.18 kg / 174.57 LBS
79184 g / 776.8 N
475.11 kg / 1047.43 LBS
~0 Gs
10 mm 449.75 kg / 991.54 LBS
8 708 Gs
67.46 kg / 148.73 LBS
67463 g / 661.8 N
404.78 kg / 892.38 LBS
~0 Gs
20 mm 316.46 kg / 697.68 LBS
7 304 Gs
47.47 kg / 104.65 LBS
47469 g / 465.7 N
284.81 kg / 627.91 LBS
~0 Gs
50 mm 96.30 kg / 212.30 LBS
4 029 Gs
14.44 kg / 31.85 LBS
14445 g / 141.7 N
86.67 kg / 191.07 LBS
~0 Gs
60 mm 64.22 kg / 141.59 LBS
3 291 Gs
9.63 kg / 21.24 LBS
9634 g / 94.5 N
57.80 kg / 127.43 LBS
~0 Gs
70 mm 43.17 kg / 95.18 LBS
2 698 Gs
6.48 kg / 14.28 LBS
6476 g / 63.5 N
38.86 kg / 85.66 LBS
~0 Gs
80 mm 29.36 kg / 64.73 LBS
2 225 Gs
4.40 kg / 9.71 LBS
4404 g / 43.2 N
26.43 kg / 58.26 LBS
~0 Gs
90 mm 20.25 kg / 44.63 LBS
1 847 Gs
3.04 kg / 6.69 LBS
3037 g / 29.8 N
18.22 kg / 40.17 LBS
~0 Gs
100 mm 14.17 kg / 31.23 LBS
1 545 Gs
2.12 kg / 4.68 LBS
2125 g / 20.8 N
12.75 kg / 28.11 LBS
~0 Gs

Table 7: Hazards (electronics) - warnings
MW 70x50 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 40.0 cm
Hearing aid 10 Gs (1.0 mT) 31.5 cm
Mechanical watch 20 Gs (2.0 mT) 24.5 cm
Mobile device 40 Gs (4.0 mT) 19.0 cm
Car key 50 Gs (5.0 mT) 17.5 cm
Payment card 400 Gs (40.0 mT) 7.5 cm
HDD hard drive 600 Gs (60.0 mT) 6.0 cm

Table 8: Dynamics (cracking risk) - warning
MW 70x50 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 13.97 km/h
(3.88 m/s)
10.87 J
30 mm 20.06 km/h
(5.57 m/s)
22.40 J
50 mm 24.70 km/h
(6.86 m/s)
33.96 J
100 mm 34.46 km/h
(9.57 m/s)
66.12 J

Table 9: Surface protection spec
MW 70x50 / 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 70x50 / N38

Parameter Value SI Unit / Description
Magnetic Flux 197 145 Mx 1971.5 µWb
Pc Coefficient 0.74 High (Stable)

Table 11: Submerged application
MW 70x50 / N38

Environment Effective steel pull Effect
Air (land) 168.21 kg Standard
Water (riverbed) 192.60 kg
(+24.39 kg buoyancy gain)
+14.5%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Shear force

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

2. Steel thickness impact

*Thin metal sheet (e.g. computer case) drastically 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) = 0.74

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 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: 010496-2026
Measurement Calculator
Force (pull)

Magnetic Induction

Other offers

The offered product is a very strong cylindrical magnet, made from durable NdFeB material, which, at dimensions of Ø70x50 mm, guarantees maximum efficiency. The MW 70x50 / N38 model is characterized by high dimensional repeatability and industrial build quality, making it an ideal solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 168.21 kg), this product is in stock from our European logistics center, ensuring rapid order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is created for building generators, advanced sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the pull force of 1650.14 N with a weight of only 1443.17 g, this cylindrical magnet is indispensable in electronics and wherever low weight is crucial.
Due to the delicate structure of the ceramic sinter, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. To ensure long-term durability in automation, 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 even stronger magnets in the same volume (Ø70x50), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 70 mm and height 50 mm. The value of 1650.14 N means that the magnet is capable of holding a weight many times exceeding its own mass of 1443.17 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 50 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 as well as cons of Nd2Fe14B magnets.

Pros

Besides their immense magnetic power, neodymium magnets offer the following advantages:
  • They do not lose strength, even after approximately ten years – the reduction in power is only ~1% (based on measurements),
  • They do not lose their magnetic properties even under close interference source,
  • By applying a shiny layer of silver, the element presents an aesthetic look,
  • Magnetic induction on the working part of the magnet remains strong,
  • 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...
  • In view of the ability of free molding and adaptation to unique requirements, NdFeB magnets can be manufactured in a variety of forms and dimensions, which increases their versatility,
  • Wide application in innovative solutions – they find application in magnetic memories, motor assemblies, advanced medical instruments, as well as complex engineering applications.
  • Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Cons

Disadvantages of NdFeB magnets:
  • They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also improves its resistance to damage
  • When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their power 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
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • We suggest a housing - magnetic mount, due to difficulties in realizing nuts inside the magnet and complicated shapes.
  • Potential hazard resulting from small fragments of magnets are risky, in case of ingestion, which is particularly important in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products are able to be problematic in diagnostics medical in case of swallowing.
  • With mass production the cost of neodymium magnets is a challenge,

Lifting parameters

Magnetic strength at its maximum – what it depends on?

Holding force of 168.21 kg is a result of laboratory testing conducted under standard conditions:
  • on a plate made of structural steel, perfectly concentrating the magnetic flux
  • with a cross-section minimum 10 mm
  • with an polished contact surface
  • with direct contact (without impurities)
  • for force applied at a right angle (pull-off, not shear)
  • at ambient temperature approx. 20 degrees Celsius

Key elements affecting lifting force

Real force impacted by specific conditions, including (from most important):
  • Gap between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Force direction – note that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Steel thickness – insufficiently thick sheet causes magnetic saturation, causing part of the power to be lost to the other side.
  • Material type – ideal substrate is pure iron steel. Stainless steels may have worse magnetic properties.
  • Surface condition – ground elements guarantee perfect abutment, which improves force. Rough surfaces reduce efficiency.
  • Operating temperature – NdFeB sinters have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).

Lifting capacity testing was performed on a smooth plate of optimal thickness, under perpendicular forces, however under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance between the magnet and the plate lowers the load capacity.

Warnings
Bodily injuries

Risk of injury: The attraction force is so immense that it can result in hematomas, crushing, and even bone fractures. Use thick gloves.

Metal Allergy

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

Powerful field

Handle magnets with awareness. Their huge power can shock even experienced users. Stay alert and respect their force.

Product not for children

Always keep magnets out of reach of children. Risk of swallowing is high, and the consequences of magnets clamping inside the body are life-threatening.

Electronic hazard

Equipment safety: Strong magnets can ruin data carriers and delicate electronics (heart implants, medical aids, timepieces).

ICD Warning

Life threat: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.

Do not overheat magnets

Standard neodymium magnets (grade N) undergo demagnetization when the temperature exceeds 80°C. The loss of strength is permanent.

Machining danger

Machining of neodymium magnets carries a risk of fire hazard. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Impact on smartphones

GPS units and smartphones are extremely sensitive to magnetism. Direct contact with a powerful NdFeB magnet can decalibrate the sensors in your phone.

Eye protection

Protect your eyes. Magnets can fracture upon violent connection, launching sharp fragments into the air. We recommend safety glasses.

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

e-mail: bok@dhit.pl

tel: +48 888 99 98 98