MW 80x30 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010100
GTIN/EAN: 5906301810995
Diameter Ø
80 mm [±0,1 mm]
Height
30 mm [±0,1 mm]
Weight
1130.97 g
Magnetization Direction
↑ axial
Load capacity
170.64 kg / 1673.99 N
Magnetic Induction
371.95 mT / 3720 Gs
Coating
[NiCuNi] Nickel
415.00 ZŁ with VAT / pcs + price for transport
337.40 ZŁ net + 23% VAT / pcs
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Technical specification - MW 80x30 / N38 - cylindrical magnet
Specification / characteristics - MW 80x30 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010100 |
| GTIN/EAN | 5906301810995 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 80 mm [±0,1 mm] |
| Height | 30 mm [±0,1 mm] |
| Weight | 1130.97 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 170.64 kg / 1673.99 N |
| Magnetic Induction ~ ? | 371.95 mT / 3720 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 |
Physical simulation of the assembly - technical parameters
Presented values are the outcome of a physical simulation. Values were calculated on algorithms for the class Nd2Fe14B. Real-world parameters may differ from theoretical values. Treat these calculations as a supplementary guide when designing systems.
Table 1: Static force (pull vs distance) - power drop
MW 80x30 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3719 Gs
371.9 mT
|
170.64 kg / 376.20 LBS
170640.0 g / 1674.0 N
|
crushing |
| 1 mm |
3643 Gs
364.3 mT
|
163.71 kg / 360.93 LBS
163714.9 g / 1606.0 N
|
crushing |
| 2 mm |
3563 Gs
356.3 mT
|
156.65 kg / 345.35 LBS
156647.8 g / 1536.7 N
|
crushing |
| 3 mm |
3482 Gs
348.2 mT
|
149.55 kg / 329.71 LBS
149554.1 g / 1467.1 N
|
crushing |
| 5 mm |
3314 Gs
331.4 mT
|
135.46 kg / 298.63 LBS
135457.0 g / 1328.8 N
|
crushing |
| 10 mm |
2880 Gs
288.0 mT
|
102.34 kg / 225.63 LBS
102343.3 g / 1004.0 N
|
crushing |
| 15 mm |
2457 Gs
245.7 mT
|
74.47 kg / 164.17 LBS
74468.4 g / 730.5 N
|
crushing |
| 20 mm |
2069 Gs
206.9 mT
|
52.79 kg / 116.38 LBS
52789.9 g / 517.9 N
|
crushing |
| 30 mm |
1439 Gs
143.9 mT
|
25.53 kg / 56.29 LBS
25534.0 g / 250.5 N
|
crushing |
| 50 mm |
704 Gs
70.4 mT
|
6.11 kg / 13.48 LBS
6115.0 g / 60.0 N
|
strong |
Table 2: Shear capacity (wall)
MW 80x30 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
34.13 kg / 75.24 LBS
34128.0 g / 334.8 N
|
| 1 mm | Stal (~0.2) |
32.74 kg / 72.18 LBS
32742.0 g / 321.2 N
|
| 2 mm | Stal (~0.2) |
31.33 kg / 69.07 LBS
31330.0 g / 307.3 N
|
| 3 mm | Stal (~0.2) |
29.91 kg / 65.94 LBS
29910.0 g / 293.4 N
|
| 5 mm | Stal (~0.2) |
27.09 kg / 59.73 LBS
27092.0 g / 265.8 N
|
| 10 mm | Stal (~0.2) |
20.47 kg / 45.12 LBS
20468.0 g / 200.8 N
|
| 15 mm | Stal (~0.2) |
14.89 kg / 32.84 LBS
14894.0 g / 146.1 N
|
| 20 mm | Stal (~0.2) |
10.56 kg / 23.28 LBS
10558.0 g / 103.6 N
|
| 30 mm | Stal (~0.2) |
5.11 kg / 11.26 LBS
5106.0 g / 50.1 N
|
| 50 mm | Stal (~0.2) |
1.22 kg / 2.69 LBS
1222.0 g / 12.0 N
|
Table 3: Vertical assembly (sliding) - vertical pull
MW 80x30 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
51.19 kg / 112.86 LBS
51192.0 g / 502.2 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
34.13 kg / 75.24 LBS
34128.0 g / 334.8 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
17.06 kg / 37.62 LBS
17064.0 g / 167.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
85.32 kg / 188.10 LBS
85320.0 g / 837.0 N
|
Table 4: Material efficiency (saturation) - power losses
MW 80x30 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
5.69 kg / 12.54 LBS
5688.0 g / 55.8 N
|
| 1 mm |
|
14.22 kg / 31.35 LBS
14220.0 g / 139.5 N
|
| 2 mm |
|
28.44 kg / 62.70 LBS
28440.0 g / 279.0 N
|
| 3 mm |
|
42.66 kg / 94.05 LBS
42660.0 g / 418.5 N
|
| 5 mm |
|
71.10 kg / 156.75 LBS
71100.0 g / 697.5 N
|
| 10 mm |
|
142.20 kg / 313.50 LBS
142200.0 g / 1395.0 N
|
| 11 mm |
|
156.42 kg / 344.85 LBS
156420.0 g / 1534.5 N
|
| 12 mm |
|
170.64 kg / 376.20 LBS
170640.0 g / 1674.0 N
|
Table 5: Thermal resistance (material behavior) - thermal limit
MW 80x30 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
170.64 kg / 376.20 LBS
170640.0 g / 1674.0 N
|
OK |
| 40 °C | -2.2% |
166.89 kg / 367.92 LBS
166885.9 g / 1637.2 N
|
OK |
| 60 °C | -4.4% |
163.13 kg / 359.64 LBS
163131.8 g / 1600.3 N
|
|
| 80 °C | -6.6% |
159.38 kg / 351.37 LBS
159377.8 g / 1563.5 N
|
|
| 100 °C | -28.8% |
121.50 kg / 267.85 LBS
121495.7 g / 1191.9 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 80x30 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
428.66 kg / 945.03 LBS
5 157 Gs
|
64.30 kg / 141.76 LBS
64299 g / 630.8 N
|
N/A |
| 1 mm |
420.08 kg / 926.12 LBS
7 364 Gs
|
63.01 kg / 138.92 LBS
63012 g / 618.1 N
|
378.07 kg / 833.51 LBS
~0 Gs
|
| 2 mm |
411.26 kg / 906.68 LBS
7 286 Gs
|
61.69 kg / 136.00 LBS
61690 g / 605.2 N
|
370.14 kg / 816.01 LBS
~0 Gs
|
| 3 mm |
402.40 kg / 887.15 LBS
7 207 Gs
|
60.36 kg / 133.07 LBS
60360 g / 592.1 N
|
362.16 kg / 798.43 LBS
~0 Gs
|
| 5 mm |
384.60 kg / 847.90 LBS
7 046 Gs
|
57.69 kg / 127.19 LBS
57690 g / 565.9 N
|
346.14 kg / 763.11 LBS
~0 Gs
|
| 10 mm |
340.28 kg / 750.18 LBS
6 627 Gs
|
51.04 kg / 112.53 LBS
51042 g / 500.7 N
|
306.25 kg / 675.17 LBS
~0 Gs
|
| 20 mm |
257.09 kg / 566.80 LBS
5 761 Gs
|
38.56 kg / 85.02 LBS
38564 g / 378.3 N
|
231.38 kg / 510.12 LBS
~0 Gs
|
| 50 mm |
92.55 kg / 204.04 LBS
3 456 Gs
|
13.88 kg / 30.61 LBS
13883 g / 136.2 N
|
83.30 kg / 183.63 LBS
~0 Gs
|
| 60 mm |
64.14 kg / 141.41 LBS
2 877 Gs
|
9.62 kg / 21.21 LBS
9622 g / 94.4 N
|
57.73 kg / 127.27 LBS
~0 Gs
|
| 70 mm |
44.44 kg / 97.98 LBS
2 395 Gs
|
6.67 kg / 14.70 LBS
6666 g / 65.4 N
|
40.00 kg / 88.18 LBS
~0 Gs
|
| 80 mm |
30.93 kg / 68.19 LBS
1 998 Gs
|
4.64 kg / 10.23 LBS
4639 g / 45.5 N
|
27.84 kg / 61.37 LBS
~0 Gs
|
| 90 mm |
21.69 kg / 47.82 LBS
1 673 Gs
|
3.25 kg / 7.17 LBS
3254 g / 31.9 N
|
19.52 kg / 43.04 LBS
~0 Gs
|
| 100 mm |
15.36 kg / 33.87 LBS
1 408 Gs
|
2.30 kg / 5.08 LBS
2304 g / 22.6 N
|
13.83 kg / 30.48 LBS
~0 Gs
|
Table 7: Hazards (implants) - precautionary measures
MW 80x30 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 37.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 29.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 23.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 18.0 cm |
| Remote | 50 Gs (5.0 mT) | 16.5 cm |
| Payment card | 400 Gs (40.0 mT) | 7.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 5.5 cm |
Table 8: Impact energy (cracking risk) - collision effects
MW 80x30 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
16.39 km/h
(4.55 m/s)
|
11.72 J | |
| 30 mm |
23.38 km/h
(6.49 m/s)
|
23.85 J | |
| 50 mm |
28.31 km/h
(7.86 m/s)
|
34.98 J | |
| 100 mm |
39.22 km/h
(10.90 m/s)
|
67.13 J |
Table 9: Coating parameters (durability)
MW 80x30 / 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 80x30 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 194 600 Mx | 1946.0 µWb |
| Pc Coefficient | 0.48 | Low (Flat) |
Table 11: Submerged application
MW 80x30 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 170.64 kg | Standard |
| Water (riverbed) |
195.38 kg
(+24.74 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Caution: On a vertical surface, the magnet retains only a fraction of its perpendicular strength.
2. Steel saturation
*Thin metal sheet (e.g. computer case) severely reduces the holding force.
3. Heat tolerance
*For N38 material, the critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.48
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.
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
See more proposals
Strengths and weaknesses of rare earth magnets.
Benefits
- They have constant strength, and over nearly 10 years their attraction force decreases symbolically – ~1% (according to theory),
- They maintain their magnetic properties even under close interference source,
- A magnet with a smooth gold surface looks better,
- Neodymium magnets generate maximum magnetic induction on a small surface, which increases force concentration,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
- Due to the potential of free molding and adaptation to individualized requirements, magnetic components can be created in a wide range of forms and dimensions, which expands the range of possible applications,
- Significant place in advanced technology sectors – they serve a role in HDD drives, drive modules, medical devices, as well as industrial machines.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Weaknesses
- At strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- NdFeB magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
- Magnets exposed to a humid environment can rust. Therefore while using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Due to limitations in realizing nuts and complicated forms in magnets, we propose using cover - magnetic holder.
- Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child safety. Furthermore, tiny parts of these magnets can be problematic in diagnostics medical after entering the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Lifting parameters
Maximum magnetic pulling force – what it depends on?
- on a block made of structural steel, optimally conducting the magnetic field
- with a thickness of at least 10 mm
- with a plane perfectly flat
- under conditions of ideal adhesion (surface-to-surface)
- during detachment in a direction perpendicular to the plane
- at room temperature
Practical lifting capacity: influencing factors
- Gap (between the magnet and the plate), as even a microscopic distance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to varnish, corrosion or dirt).
- Load vector – highest force is available only during perpendicular pulling. The shear force of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
- Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of generating force.
- Metal type – not every steel attracts identically. High carbon content worsen the interaction with the magnet.
- Surface structure – the more even the surface, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
- Operating temperature – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).
Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, whereas under shearing force the load capacity is reduced by as much as 75%. Additionally, even a minimal clearance between the magnet and the plate lowers the holding force.
Warnings
Magnet fragility
Neodymium magnets are sintered ceramics, which means they are prone to chipping. Impact of two magnets leads to them breaking into small pieces.
Permanent damage
Standard neodymium magnets (N-type) lose power when the temperature exceeds 80°C. This process is irreversible.
Crushing risk
Watch your fingers. Two large magnets will join instantly with a force of several hundred kilograms, crushing anything in their path. Be careful!
Precision electronics
A powerful magnetic field negatively affects the operation of magnetometers in smartphones and navigation systems. Maintain magnets near a device to prevent breaking the sensors.
Danger to the youngest
Neodymium magnets are not intended for children. Eating several magnets may result in them attracting across intestines, which constitutes a critical condition and necessitates immediate surgery.
Nickel allergy
Medical facts indicate that the nickel plating (standard magnet coating) is a strong allergen. If your skin reacts to metals, avoid touching magnets with bare hands or opt for versions in plastic housing.
Health Danger
For implant holders: Strong magnetic fields disrupt medical devices. Keep minimum 30 cm distance or ask another person to handle the magnets.
Handling rules
Be careful. Neodymium magnets attract from a long distance and snap with massive power, often faster than you can react.
Mechanical processing
Fire hazard: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this may cause fire.
Safe distance
Powerful magnetic fields can destroy records on payment cards, hard drives, and storage devices. Stay away of at least 10 cm.
