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
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
512.20 zł net / pcs
630.01 zł with VAT (23% VAT) / pcs
bulk discounts:
Need more?Frequently asked questions
What is the maximum working temperature of a disc magnet?
What is the difference between N38, N42 and N52?
What is the dimensional tolerance?
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.
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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 | 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 simulation of the product - technical parameters
Presented data are the outcome of a physical analysis. Values were calculated on algorithms for the class Nd2Fe14B. Operational conditions might slightly deviate from the simulation results. Please consider these calculations as a reference point when designing systems.
Table 1: Static pull force (pull 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 LBS
163930.0 g / 1608.2 N
|
dangerous! |
| 1 mm |
5201 Gs
520.1 mT
|
154.68 kg / 341.01 LBS
154677.8 g / 1517.4 N
|
dangerous! |
| 2 mm |
5045 Gs
504.5 mT
|
145.58 kg / 320.96 LBS
145583.5 g / 1428.2 N
|
dangerous! |
| 3 mm |
4890 Gs
489.0 mT
|
136.77 kg / 301.52 LBS
136769.5 g / 1341.7 N
|
dangerous! |
| 5 mm |
4582 Gs
458.2 mT
|
120.07 kg / 264.72 LBS
120074.6 g / 1177.9 N
|
dangerous! |
| 10 mm |
3842 Gs
384.2 mT
|
84.43 kg / 186.13 LBS
84425.8 g / 828.2 N
|
dangerous! |
| 15 mm |
3176 Gs
317.6 mT
|
57.69 kg / 127.18 LBS
57688.8 g / 565.9 N
|
dangerous! |
| 20 mm |
2604 Gs
260.4 mT
|
38.78 kg / 85.50 LBS
38782.9 g / 380.5 N
|
dangerous! |
| 30 mm |
1744 Gs
174.4 mT
|
17.39 kg / 38.33 LBS
17385.0 g / 170.5 N
|
dangerous! |
| 50 mm |
829 Gs
82.9 mT
|
3.93 kg / 8.66 LBS
3929.4 g / 38.5 N
|
medium risk |
Table 2: Slippage hold (vertical surface)
MW 70x60 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
32.79 kg / 72.28 LBS
32786.0 g / 321.6 N
|
| 1 mm | Stal (~0.2) |
30.94 kg / 68.20 LBS
30936.0 g / 303.5 N
|
| 2 mm | Stal (~0.2) |
29.12 kg / 64.19 LBS
29116.0 g / 285.6 N
|
| 3 mm | Stal (~0.2) |
27.35 kg / 60.31 LBS
27354.0 g / 268.3 N
|
| 5 mm | Stal (~0.2) |
24.01 kg / 52.94 LBS
24014.0 g / 235.6 N
|
| 10 mm | Stal (~0.2) |
16.89 kg / 37.23 LBS
16886.0 g / 165.7 N
|
| 15 mm | Stal (~0.2) |
11.54 kg / 25.44 LBS
11538.0 g / 113.2 N
|
| 20 mm | Stal (~0.2) |
7.76 kg / 17.10 LBS
7756.0 g / 76.1 N
|
| 30 mm | Stal (~0.2) |
3.48 kg / 7.67 LBS
3478.0 g / 34.1 N
|
| 50 mm | Stal (~0.2) |
0.79 kg / 1.73 LBS
786.0 g / 7.7 N
|
Table 3: Wall mounting (sliding) - 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 LBS
49179.0 g / 482.4 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
32.79 kg / 72.28 LBS
32786.0 g / 321.6 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
16.39 kg / 36.14 LBS
16393.0 g / 160.8 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
81.97 kg / 180.70 LBS
81965.0 g / 804.1 N
|
Table 4: Material efficiency (substrate influence) - power losses
MW 70x60 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
5.46 kg / 12.05 LBS
5464.3 g / 53.6 N
|
| 1 mm |
|
13.66 kg / 30.12 LBS
13660.8 g / 134.0 N
|
| 2 mm |
|
27.32 kg / 60.23 LBS
27321.7 g / 268.0 N
|
| 3 mm |
|
40.98 kg / 90.35 LBS
40982.5 g / 402.0 N
|
| 5 mm |
|
68.30 kg / 150.58 LBS
68304.2 g / 670.1 N
|
| 10 mm |
|
136.61 kg / 301.17 LBS
136608.3 g / 1340.1 N
|
| 11 mm |
|
150.27 kg / 331.29 LBS
150269.2 g / 1474.1 N
|
| 12 mm |
|
163.93 kg / 361.40 LBS
163930.0 g / 1608.2 N
|
Table 5: Working in heat (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 LBS
163930.0 g / 1608.2 N
|
OK |
| 40 °C | -2.2% |
160.32 kg / 353.45 LBS
160323.5 g / 1572.8 N
|
OK |
| 60 °C | -4.4% |
156.72 kg / 345.50 LBS
156717.1 g / 1537.4 N
|
OK |
| 80 °C | -6.6% |
153.11 kg / 337.55 LBS
153110.6 g / 1502.0 N
|
|
| 100 °C | -28.8% |
116.72 kg / 257.32 LBS
116718.2 g / 1145.0 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 70x60 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
680.08 kg / 1499.31 LBS
5 950 Gs
|
102.01 kg / 224.90 LBS
102012 g / 1000.7 N
|
N/A |
| 1 mm |
660.96 kg / 1457.16 LBS
10 556 Gs
|
99.14 kg / 218.57 LBS
99144 g / 972.6 N
|
594.86 kg / 1311.45 LBS
~0 Gs
|
| 2 mm |
641.69 kg / 1414.69 LBS
10 401 Gs
|
96.25 kg / 212.20 LBS
96254 g / 944.3 N
|
577.52 kg / 1273.22 LBS
~0 Gs
|
| 3 mm |
622.69 kg / 1372.80 LBS
10 246 Gs
|
93.40 kg / 205.92 LBS
93404 g / 916.3 N
|
560.42 kg / 1235.52 LBS
~0 Gs
|
| 5 mm |
585.53 kg / 1290.87 LBS
9 936 Gs
|
87.83 kg / 193.63 LBS
87830 g / 861.6 N
|
526.98 kg / 1161.79 LBS
~0 Gs
|
| 10 mm |
498.14 kg / 1098.21 LBS
9 164 Gs
|
74.72 kg / 164.73 LBS
74721 g / 733.0 N
|
448.33 kg / 988.39 LBS
~0 Gs
|
| 20 mm |
350.25 kg / 772.16 LBS
7 684 Gs
|
52.54 kg / 115.82 LBS
52537 g / 515.4 N
|
315.22 kg / 694.95 LBS
~0 Gs
|
| 50 mm |
107.57 kg / 237.16 LBS
4 259 Gs
|
16.14 kg / 35.57 LBS
16136 g / 158.3 N
|
96.82 kg / 213.44 LBS
~0 Gs
|
| 60 mm |
72.12 kg / 159.00 LBS
3 487 Gs
|
10.82 kg / 23.85 LBS
10818 g / 106.1 N
|
64.91 kg / 143.10 LBS
~0 Gs
|
| 70 mm |
48.77 kg / 107.51 LBS
2 867 Gs
|
7.31 kg / 16.13 LBS
7315 g / 71.8 N
|
43.89 kg / 96.76 LBS
~0 Gs
|
| 80 mm |
33.37 kg / 73.57 LBS
2 372 Gs
|
5.01 kg / 11.04 LBS
5005 g / 49.1 N
|
30.03 kg / 66.21 LBS
~0 Gs
|
| 90 mm |
23.15 kg / 51.04 LBS
1 976 Gs
|
3.47 kg / 7.66 LBS
3473 g / 34.1 N
|
20.84 kg / 45.94 LBS
~0 Gs
|
| 100 mm |
16.30 kg / 35.94 LBS
1 658 Gs
|
2.45 kg / 5.39 LBS
2445 g / 24.0 N
|
14.67 kg / 32.34 LBS
~0 Gs
|
Table 7: Hazards (electronics) - precautionary measures
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 |
| Mechanical watch | 20 Gs (2.0 mT) | 25.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 19.5 cm |
| Remote | 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) - warning
MW 70x60 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
13.35 km/h
(3.71 m/s)
|
11.92 J | |
| 30 mm |
17.44 km/h
(4.84 m/s)
|
20.32 J | |
| 50 mm |
18.17 km/h
(5.05 m/s)
|
22.06 J | |
| 100 mm |
18.41 km/h
(5.12 m/s)
|
22.66 J |
Table 9: Corrosion resistance
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. Vertical hold
*Warning: On a vertical surface, the magnet holds merely a fraction of its max power.
2. Efficiency vs thickness
*Thin steel (e.g. 0.5mm PC case) significantly limits the holding force.
3. Heat tolerance
*For N38 material, 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.
Material specification
| 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 |
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Pros and cons of Nd2Fe14B magnets.
Strengths
- They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
- They are extremely resistant to demagnetization induced by presence of other magnetic fields,
- The use of an shiny coating of noble metals (nickel, gold, silver) causes the element to present itself better,
- The surface of neodymium magnets generates a unique magnetic field – this is one of their assets,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
- Due to the ability of flexible molding and adaptation to specialized needs, magnetic components can be manufactured in a variety of geometric configurations, which increases their versatility,
- Huge importance in modern industrial fields – they serve a role in hard drives, brushless drives, precision medical tools, and complex engineering applications.
- Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,
Cons
- To avoid cracks under impact, we suggest using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
- 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 rust. Therefore while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture
- Limited ability of producing threads in the magnet and complicated shapes - recommended is cover - magnet mounting.
- Possible danger related to microscopic parts of magnets can be dangerous, in case of ingestion, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these magnets are able to be problematic in diagnostics medical in case of swallowing.
- With mass production the cost of neodymium magnets can be a barrier,
Pull force analysis
Highest magnetic holding force – what affects it?
- using a plate made of high-permeability steel, acting as a ideal flux conductor
- with a thickness no less than 10 mm
- characterized by smoothness
- without any clearance between the magnet and steel
- under perpendicular force direction (90-degree angle)
- at conditions approx. 20°C
Lifting capacity in real conditions – factors
- Space between surfaces – every millimeter of distance (caused e.g. by veneer or dirt) diminishes the pulling force, often by half at just 0.5 mm.
- Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the nominal value.
- Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
- Material composition – not every steel attracts identically. High carbon content worsen the interaction with the magnet.
- Smoothness – ideal contact is obtained only on polished steel. Any scratches and bumps create air cushions, reducing force.
- Thermal environment – heating the magnet causes a temporary drop of induction. Check the thermal limit for a given model.
Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the holding force is lower. Additionally, even a small distance between the magnet’s surface and the plate reduces the holding force.
Precautions when working with neodymium magnets
Magnetic media
Intense magnetic fields can erase data on credit cards, HDDs, and storage devices. Stay away of min. 10 cm.
Material brittleness
Despite the nickel coating, the material is brittle and cannot withstand shocks. Avoid impacts, as the magnet may crumble into hazardous fragments.
Crushing risk
Large magnets can break fingers in a fraction of a second. Do not put your hand between two strong magnets.
Medical implants
Warning for patients: Powerful magnets disrupt medical devices. Maintain at least 30 cm distance or request help to work with the magnets.
Fire warning
Powder created during cutting of magnets is self-igniting. Do not drill into magnets unless you are an expert.
Handling rules
Handle magnets with awareness. Their huge power can surprise even professionals. Be vigilant and do not underestimate their power.
Allergic reactions
Studies show that nickel (standard magnet coating) is a common allergen. For allergy sufferers, refrain from touching magnets with bare hands and select coated magnets.
Compass and GPS
GPS units and mobile phones are highly susceptible to magnetism. Direct contact with a strong magnet can ruin the sensors in your phone.
Thermal limits
Monitor thermal conditions. Heating the magnet to high heat will destroy its properties and strength.
Choking Hazard
Adult use only. Small elements pose a choking risk, leading to intestinal necrosis. Keep out of reach of kids and pets.
