MW 70x60 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010098
GTIN/EAN: 5906301810971
Diameter Ø
70 mm [±0,1 mm]
Height
60 mm [±0,1 mm]
Weight
1731.8 g
Magnetization Direction
↑ axial
Load capacity
163.93 kg / 1608.16 N
Magnetic Induction
535.45 mT / 5354 Gs
Coating
[NiCuNi] Nickel
630.01 ZŁ with VAT / pcs + price for transport
512.20 ZŁ net + 23% VAT / pcs
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Physical properties - MW 70x60 / N38 - cylindrical magnet
Specification / characteristics - MW 70x60 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010098 |
| GTIN/EAN | 5906301810971 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 70 mm [±0,1 mm] |
| Height | 60 mm [±0,1 mm] |
| Weight | 1731.8 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 163.93 kg / 1608.16 N |
| Magnetic Induction ~ ? | 535.45 mT / 5354 Gs |
| Coating | [NiCuNi] Nickel |
| Manufacturing Tolerance | ±0.1 mm |
Magnetic properties of material N38
| 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
| 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 |
Technical simulation of the assembly - technical parameters
These data represent the direct effect of a physical calculation. Values were calculated on models for the class Nd2Fe14B. Operational conditions may differ. Please consider these calculations as a supplementary guide when designing systems.
Table 1: Static pull force (force vs distance) - power drop
MW 70x60 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
5354 Gs
535.4 mT
|
163.93 kg / 361.40 pounds
163930.0 g / 1608.2 N
|
critical level |
| 1 mm |
5201 Gs
520.1 mT
|
154.68 kg / 341.01 pounds
154677.8 g / 1517.4 N
|
critical level |
| 2 mm |
5045 Gs
504.5 mT
|
145.58 kg / 320.96 pounds
145583.5 g / 1428.2 N
|
critical level |
| 3 mm |
4890 Gs
489.0 mT
|
136.77 kg / 301.52 pounds
136769.5 g / 1341.7 N
|
critical level |
| 5 mm |
4582 Gs
458.2 mT
|
120.07 kg / 264.72 pounds
120074.6 g / 1177.9 N
|
critical level |
| 10 mm |
3842 Gs
384.2 mT
|
84.43 kg / 186.13 pounds
84425.8 g / 828.2 N
|
critical level |
| 15 mm |
3176 Gs
317.6 mT
|
57.69 kg / 127.18 pounds
57688.8 g / 565.9 N
|
critical level |
| 20 mm |
2604 Gs
260.4 mT
|
38.78 kg / 85.50 pounds
38782.9 g / 380.5 N
|
critical level |
| 30 mm |
1744 Gs
174.4 mT
|
17.39 kg / 38.33 pounds
17385.0 g / 170.5 N
|
critical level |
| 50 mm |
829 Gs
82.9 mT
|
3.93 kg / 8.66 pounds
3929.4 g / 38.5 N
|
warning |
Table 2: Sliding force (wall)
MW 70x60 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
32.79 kg / 72.28 pounds
32786.0 g / 321.6 N
|
| 1 mm | Stal (~0.2) |
30.94 kg / 68.20 pounds
30936.0 g / 303.5 N
|
| 2 mm | Stal (~0.2) |
29.12 kg / 64.19 pounds
29116.0 g / 285.6 N
|
| 3 mm | Stal (~0.2) |
27.35 kg / 60.31 pounds
27354.0 g / 268.3 N
|
| 5 mm | Stal (~0.2) |
24.01 kg / 52.94 pounds
24014.0 g / 235.6 N
|
| 10 mm | Stal (~0.2) |
16.89 kg / 37.23 pounds
16886.0 g / 165.7 N
|
| 15 mm | Stal (~0.2) |
11.54 kg / 25.44 pounds
11538.0 g / 113.2 N
|
| 20 mm | Stal (~0.2) |
7.76 kg / 17.10 pounds
7756.0 g / 76.1 N
|
| 30 mm | Stal (~0.2) |
3.48 kg / 7.67 pounds
3478.0 g / 34.1 N
|
| 50 mm | Stal (~0.2) |
0.79 kg / 1.73 pounds
786.0 g / 7.7 N
|
Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 70x60 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
49.18 kg / 108.42 pounds
49179.0 g / 482.4 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
32.79 kg / 72.28 pounds
32786.0 g / 321.6 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
16.39 kg / 36.14 pounds
16393.0 g / 160.8 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
81.97 kg / 180.70 pounds
81965.0 g / 804.1 N
|
Table 4: Steel thickness (saturation) - sheet metal selection
MW 70x60 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
5.46 kg / 12.05 pounds
5464.3 g / 53.6 N
|
| 1 mm |
|
13.66 kg / 30.12 pounds
13660.8 g / 134.0 N
|
| 2 mm |
|
27.32 kg / 60.23 pounds
27321.7 g / 268.0 N
|
| 3 mm |
|
40.98 kg / 90.35 pounds
40982.5 g / 402.0 N
|
| 5 mm |
|
68.30 kg / 150.58 pounds
68304.2 g / 670.1 N
|
| 10 mm |
|
136.61 kg / 301.17 pounds
136608.3 g / 1340.1 N
|
| 11 mm |
|
150.27 kg / 331.29 pounds
150269.2 g / 1474.1 N
|
| 12 mm |
|
163.93 kg / 361.40 pounds
163930.0 g / 1608.2 N
|
Table 5: Thermal stability (material behavior) - resistance threshold
MW 70x60 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
163.93 kg / 361.40 pounds
163930.0 g / 1608.2 N
|
OK |
| 40 °C | -2.2% |
160.32 kg / 353.45 pounds
160323.5 g / 1572.8 N
|
OK |
| 60 °C | -4.4% |
156.72 kg / 345.50 pounds
156717.1 g / 1537.4 N
|
OK |
| 80 °C | -6.6% |
153.11 kg / 337.55 pounds
153110.6 g / 1502.0 N
|
|
| 100 °C | -28.8% |
116.72 kg / 257.32 pounds
116718.2 g / 1145.0 N
|
Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 70x60 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
680.08 kg / 1499.31 pounds
5 950 Gs
|
102.01 kg / 224.90 pounds
102012 g / 1000.7 N
|
N/A |
| 1 mm |
660.96 kg / 1457.16 pounds
10 556 Gs
|
99.14 kg / 218.57 pounds
99144 g / 972.6 N
|
594.86 kg / 1311.45 pounds
~0 Gs
|
| 2 mm |
641.69 kg / 1414.69 pounds
10 401 Gs
|
96.25 kg / 212.20 pounds
96254 g / 944.3 N
|
577.52 kg / 1273.22 pounds
~0 Gs
|
| 3 mm |
622.69 kg / 1372.80 pounds
10 246 Gs
|
93.40 kg / 205.92 pounds
93404 g / 916.3 N
|
560.42 kg / 1235.52 pounds
~0 Gs
|
| 5 mm |
585.53 kg / 1290.87 pounds
9 936 Gs
|
87.83 kg / 193.63 pounds
87830 g / 861.6 N
|
526.98 kg / 1161.79 pounds
~0 Gs
|
| 10 mm |
498.14 kg / 1098.21 pounds
9 164 Gs
|
74.72 kg / 164.73 pounds
74721 g / 733.0 N
|
448.33 kg / 988.39 pounds
~0 Gs
|
| 20 mm |
350.25 kg / 772.16 pounds
7 684 Gs
|
52.54 kg / 115.82 pounds
52537 g / 515.4 N
|
315.22 kg / 694.95 pounds
~0 Gs
|
| 50 mm |
107.57 kg / 237.16 pounds
4 259 Gs
|
16.14 kg / 35.57 pounds
16136 g / 158.3 N
|
96.82 kg / 213.44 pounds
~0 Gs
|
| 60 mm |
72.12 kg / 159.00 pounds
3 487 Gs
|
10.82 kg / 23.85 pounds
10818 g / 106.1 N
|
64.91 kg / 143.10 pounds
~0 Gs
|
| 70 mm |
48.77 kg / 107.51 pounds
2 867 Gs
|
7.31 kg / 16.13 pounds
7315 g / 71.8 N
|
43.89 kg / 96.76 pounds
~0 Gs
|
| 80 mm |
33.37 kg / 73.57 pounds
2 372 Gs
|
5.01 kg / 11.04 pounds
5005 g / 49.1 N
|
30.03 kg / 66.21 pounds
~0 Gs
|
| 90 mm |
23.15 kg / 51.04 pounds
1 976 Gs
|
3.47 kg / 7.66 pounds
3473 g / 34.1 N
|
20.84 kg / 45.94 pounds
~0 Gs
|
| 100 mm |
16.30 kg / 35.94 pounds
1 658 Gs
|
2.45 kg / 5.39 pounds
2445 g / 24.0 N
|
14.67 kg / 32.34 pounds
~0 Gs
|
Table 7: Hazards (implants) - warnings
MW 70x60 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 42.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 33.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 25.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 19.5 cm |
| Car key | 50 Gs (5.0 mT) | 18.0 cm |
| Payment card | 400 Gs (40.0 mT) | 7.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 6.0 cm |
Table 8: Impact energy (kinetic energy) - collision effects
MW 70x60 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
12.58 km/h
(3.49 m/s)
|
10.57 J | |
| 30 mm |
18.09 km/h
(5.02 m/s)
|
21.86 J | |
| 50 mm |
22.27 km/h
(6.19 m/s)
|
33.13 J | |
| 100 mm |
31.06 km/h
(8.63 m/s)
|
64.44 J |
Table 9: Surface protection spec
MW 70x60 / 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 70x60 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 209 626 Mx | 2096.3 µWb |
| Pc Coefficient | 0.82 | High (Stable) |
Table 11: Hydrostatics and buoyancy
MW 70x60 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 163.93 kg | Standard |
| Water (riverbed) |
187.70 kg
(+23.77 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Warning: On a vertical surface, the magnet holds merely a fraction of its nominal pull.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) significantly weakens the holding force.
3. Heat tolerance
*For standard magnets, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.82
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.
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 |
Other offers
Advantages and disadvantages of Nd2Fe14B magnets.
Strengths
- Their magnetic field is durable, and after around 10 years it decreases only by ~1% (according to research),
- Neodymium magnets prove to be extremely resistant to demagnetization caused by magnetic disturbances,
- By using a smooth layer of silver, the element acquires an aesthetic look,
- Neodymium magnets deliver maximum magnetic induction on a their surface, which increases force concentration,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
- In view of the potential of accurate molding and customization to individualized solutions, neodymium magnets can be modeled in a broad palette of forms and dimensions, which makes them more universal,
- Wide application in advanced technology sectors – they are used in hard drives, electromotive mechanisms, advanced medical instruments, as well as other advanced devices.
- Thanks to their power density, small magnets offer high operating force, in miniature format,
Cons
- They are fragile upon heavy 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 strength. 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
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
- We recommend casing - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complex shapes.
- Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, small elements of these products can complicate diagnosis medical in case of swallowing.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities
Pull force analysis
Maximum lifting force for a neodymium magnet – what it depends on?
- on a plate made of structural steel, perfectly concentrating the magnetic field
- with a thickness no less than 10 mm
- characterized by smoothness
- without the slightest insulating layer between the magnet and steel
- under vertical application of breakaway force (90-degree angle)
- at ambient temperature approx. 20 degrees Celsius
Impact of factors on magnetic holding capacity in practice
- Gap (between the magnet and the metal), since even a microscopic clearance (e.g. 0.5 mm) leads to a drastic drop in force by up to 50% (this also applies to paint, rust or debris).
- Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
- Plate thickness – insufficiently thick steel does not close the flux, causing part of the power to be lost to the other side.
- Material composition – different alloys reacts the same. High carbon content worsen the interaction with the magnet.
- Surface condition – smooth surfaces ensure maximum contact, which increases force. Uneven metal weaken the grip.
- Temperature influence – high temperature reduces pulling force. Too high temperature can permanently damage the magnet.
Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under attempts to slide the magnet the lifting capacity is smaller. In addition, even a small distance between the magnet and the plate reduces the load capacity.
H&S for magnets
Pinching danger
Pinching hazard: The pulling power is so great that it can cause blood blisters, pinching, and even bone fractures. Protective gloves are recommended.
Magnet fragility
Protect your eyes. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. We recommend safety glasses.
Safe operation
Before starting, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.
Warning for allergy sufferers
Allergy Notice: The Ni-Cu-Ni coating contains nickel. If an allergic reaction occurs, immediately stop working with magnets and wear gloves.
Keep away from computers
Very strong magnetic fields can destroy records on payment cards, hard drives, and storage devices. Maintain a gap of at least 10 cm.
Do not drill into magnets
Machining of neodymium magnets carries a risk of fire risk. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.
Threat to navigation
Be aware: neodymium magnets produce a field that confuses sensitive sensors. Maintain a safe distance from your phone, device, and GPS.
Medical implants
Warning for patients: Strong magnetic fields affect electronics. Keep at least 30 cm distance or ask another person to work with the magnets.
Do not give to children
Adult use only. Small elements can be swallowed, leading to serious injuries. Store away from children and animals.
Heat sensitivity
Regular neodymium magnets (grade N) undergo demagnetization when the temperature exceeds 80°C. The loss of strength is permanent.
