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
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Detailed 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 |
Engineering analysis of the magnet - technical parameters
The following data constitute the result of a physical simulation. Results are based on algorithms for the class Nd2Fe14B. Real-world performance may differ from theoretical values. Treat these data as a supplementary guide during assembly planning.
Table 1: Static force (pull vs gap) - 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 pounds
170640.0 g / 1674.0 N
|
critical level |
| 1 mm |
3643 Gs
364.3 mT
|
163.71 kg / 360.93 pounds
163714.9 g / 1606.0 N
|
critical level |
| 2 mm |
3563 Gs
356.3 mT
|
156.65 kg / 345.35 pounds
156647.8 g / 1536.7 N
|
critical level |
| 3 mm |
3482 Gs
348.2 mT
|
149.55 kg / 329.71 pounds
149554.1 g / 1467.1 N
|
critical level |
| 5 mm |
3314 Gs
331.4 mT
|
135.46 kg / 298.63 pounds
135457.0 g / 1328.8 N
|
critical level |
| 10 mm |
2880 Gs
288.0 mT
|
102.34 kg / 225.63 pounds
102343.3 g / 1004.0 N
|
critical level |
| 15 mm |
2457 Gs
245.7 mT
|
74.47 kg / 164.17 pounds
74468.4 g / 730.5 N
|
critical level |
| 20 mm |
2069 Gs
206.9 mT
|
52.79 kg / 116.38 pounds
52789.9 g / 517.9 N
|
critical level |
| 30 mm |
1439 Gs
143.9 mT
|
25.53 kg / 56.29 pounds
25534.0 g / 250.5 N
|
critical level |
| 50 mm |
704 Gs
70.4 mT
|
6.11 kg / 13.48 pounds
6115.0 g / 60.0 N
|
warning |
Table 2: Sliding hold (vertical surface)
MW 80x30 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
34.13 kg / 75.24 pounds
34128.0 g / 334.8 N
|
| 1 mm | Stal (~0.2) |
32.74 kg / 72.18 pounds
32742.0 g / 321.2 N
|
| 2 mm | Stal (~0.2) |
31.33 kg / 69.07 pounds
31330.0 g / 307.3 N
|
| 3 mm | Stal (~0.2) |
29.91 kg / 65.94 pounds
29910.0 g / 293.4 N
|
| 5 mm | Stal (~0.2) |
27.09 kg / 59.73 pounds
27092.0 g / 265.8 N
|
| 10 mm | Stal (~0.2) |
20.47 kg / 45.12 pounds
20468.0 g / 200.8 N
|
| 15 mm | Stal (~0.2) |
14.89 kg / 32.84 pounds
14894.0 g / 146.1 N
|
| 20 mm | Stal (~0.2) |
10.56 kg / 23.28 pounds
10558.0 g / 103.6 N
|
| 30 mm | Stal (~0.2) |
5.11 kg / 11.26 pounds
5106.0 g / 50.1 N
|
| 50 mm | Stal (~0.2) |
1.22 kg / 2.69 pounds
1222.0 g / 12.0 N
|
Table 3: Wall mounting (shearing) - 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 pounds
51192.0 g / 502.2 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
34.13 kg / 75.24 pounds
34128.0 g / 334.8 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
17.06 kg / 37.62 pounds
17064.0 g / 167.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
85.32 kg / 188.10 pounds
85320.0 g / 837.0 N
|
Table 4: Material efficiency (saturation) - sheet metal selection
MW 80x30 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
5.69 kg / 12.54 pounds
5688.0 g / 55.8 N
|
| 1 mm |
|
14.22 kg / 31.35 pounds
14220.0 g / 139.5 N
|
| 2 mm |
|
28.44 kg / 62.70 pounds
28440.0 g / 279.0 N
|
| 3 mm |
|
42.66 kg / 94.05 pounds
42660.0 g / 418.5 N
|
| 5 mm |
|
71.10 kg / 156.75 pounds
71100.0 g / 697.5 N
|
| 10 mm |
|
142.20 kg / 313.50 pounds
142200.0 g / 1395.0 N
|
| 11 mm |
|
156.42 kg / 344.85 pounds
156420.0 g / 1534.5 N
|
| 12 mm |
|
170.64 kg / 376.20 pounds
170640.0 g / 1674.0 N
|
Table 5: Working in heat (material behavior) - power drop
MW 80x30 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
170.64 kg / 376.20 pounds
170640.0 g / 1674.0 N
|
OK |
| 40 °C | -2.2% |
166.89 kg / 367.92 pounds
166885.9 g / 1637.2 N
|
OK |
| 60 °C | -4.4% |
163.13 kg / 359.64 pounds
163131.8 g / 1600.3 N
|
|
| 80 °C | -6.6% |
159.38 kg / 351.37 pounds
159377.8 g / 1563.5 N
|
|
| 100 °C | -28.8% |
121.50 kg / 267.85 pounds
121495.7 g / 1191.9 N
|
Table 6: Two magnets (repulsion) - field range
MW 80x30 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
428.66 kg / 945.03 pounds
5 157 Gs
|
64.30 kg / 141.76 pounds
64299 g / 630.8 N
|
N/A |
| 1 mm |
420.08 kg / 926.12 pounds
7 364 Gs
|
63.01 kg / 138.92 pounds
63012 g / 618.1 N
|
378.07 kg / 833.51 pounds
~0 Gs
|
| 2 mm |
411.26 kg / 906.68 pounds
7 286 Gs
|
61.69 kg / 136.00 pounds
61690 g / 605.2 N
|
370.14 kg / 816.01 pounds
~0 Gs
|
| 3 mm |
402.40 kg / 887.15 pounds
7 207 Gs
|
60.36 kg / 133.07 pounds
60360 g / 592.1 N
|
362.16 kg / 798.43 pounds
~0 Gs
|
| 5 mm |
384.60 kg / 847.90 pounds
7 046 Gs
|
57.69 kg / 127.19 pounds
57690 g / 565.9 N
|
346.14 kg / 763.11 pounds
~0 Gs
|
| 10 mm |
340.28 kg / 750.18 pounds
6 627 Gs
|
51.04 kg / 112.53 pounds
51042 g / 500.7 N
|
306.25 kg / 675.17 pounds
~0 Gs
|
| 20 mm |
257.09 kg / 566.80 pounds
5 761 Gs
|
38.56 kg / 85.02 pounds
38564 g / 378.3 N
|
231.38 kg / 510.12 pounds
~0 Gs
|
| 50 mm |
92.55 kg / 204.04 pounds
3 456 Gs
|
13.88 kg / 30.61 pounds
13883 g / 136.2 N
|
83.30 kg / 183.63 pounds
~0 Gs
|
| 60 mm |
64.14 kg / 141.41 pounds
2 877 Gs
|
9.62 kg / 21.21 pounds
9622 g / 94.4 N
|
57.73 kg / 127.27 pounds
~0 Gs
|
| 70 mm |
44.44 kg / 97.98 pounds
2 395 Gs
|
6.67 kg / 14.70 pounds
6666 g / 65.4 N
|
40.00 kg / 88.18 pounds
~0 Gs
|
| 80 mm |
30.93 kg / 68.19 pounds
1 998 Gs
|
4.64 kg / 10.23 pounds
4639 g / 45.5 N
|
27.84 kg / 61.37 pounds
~0 Gs
|
| 90 mm |
21.69 kg / 47.82 pounds
1 673 Gs
|
3.25 kg / 7.17 pounds
3254 g / 31.9 N
|
19.52 kg / 43.04 pounds
~0 Gs
|
| 100 mm |
15.36 kg / 33.87 pounds
1 408 Gs
|
2.30 kg / 5.08 pounds
2304 g / 22.6 N
|
13.83 kg / 30.48 pounds
~0 Gs
|
Table 7: Safety (HSE) (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 |
| Mechanical watch | 20 Gs (2.0 mT) | 23.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 18.0 cm |
| Car key | 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: Collisions (cracking risk) - warning
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: Underwater work (magnet fishing)
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. Sliding resistance
*Caution: On a vertical surface, the magnet retains merely ~20% of its perpendicular strength.
2. Steel saturation
*Thin steel (e.g. computer case) drastically reduces the holding force.
3. Heat tolerance
*For N38 material, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.48
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.
Elemental analysis
| 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 |
Other offers
Advantages as well as disadvantages of neodymium magnets.
Strengths
- They have constant strength, and over more than ten years their attraction force decreases symbolically – ~1% (in testing),
- They maintain their magnetic properties even under strong external field,
- In other words, due to the aesthetic surface of nickel, the element becomes visually attractive,
- They feature high magnetic induction at the operating surface, making them more effective,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
- In view of the possibility of free forming and adaptation to unique solutions, neodymium magnets can be manufactured in a variety of forms and dimensions, which expands the range of possible applications,
- Significant place in innovative solutions – they are utilized in hard drives, electromotive mechanisms, medical devices, and multitasking production systems.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Cons
- At very strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
- NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
- Magnets exposed to a humid environment can rust. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
- Limited ability of creating nuts in the magnet and complicated forms - recommended is a housing - mounting mechanism.
- Potential hazard related to microscopic parts of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. Additionally, small components of these products can be problematic in diagnostics medical after entering the body.
- With mass production the cost of neodymium magnets can be a barrier,
Lifting parameters
Maximum holding power of the magnet – what contributes to it?
- on a block made of mild steel, effectively closing the magnetic flux
- with a cross-section minimum 10 mm
- characterized by even structure
- under conditions of gap-free contact (surface-to-surface)
- during detachment in a direction perpendicular to the plane
- at conditions approx. 20°C
Determinants of lifting force in real conditions
- Distance – the presence of foreign body (paint, tape, gap) acts as an insulator, which reduces power rapidly (even by 50% at 0.5 mm).
- Loading method – declared lifting capacity refers to pulling vertically. When slipping, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
- Plate thickness – insufficiently thick plate causes magnetic saturation, causing part of the power to be lost into the air.
- Steel grade – the best choice is high-permeability steel. Hardened steels may have worse magnetic properties.
- Base smoothness – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
- Temperature – temperature increase results in weakening of induction. It is worth remembering the maximum operating temperature for a given model.
Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas under shearing force the holding force is lower. Moreover, even a small distance between the magnet’s surface and the plate lowers the load capacity.
H&S for magnets
Finger safety
Risk of injury: The pulling power is so great that it can result in hematomas, pinching, and broken bones. Use thick gloves.
Implant safety
People with a heart stimulator must keep an absolute distance from magnets. The magnetic field can disrupt the operation of the implant.
Cards and drives
Device Safety: Strong magnets can damage data carriers and sensitive devices (pacemakers, medical aids, timepieces).
Impact on smartphones
A powerful magnetic field interferes with the functioning of compasses in phones and navigation systems. Do not bring magnets close to a smartphone to prevent damaging the sensors.
Do not drill into magnets
Fire hazard: Neodymium dust is highly flammable. Avoid machining magnets in home conditions as this risks ignition.
Operating temperature
Standard neodymium magnets (grade N) lose power when the temperature surpasses 80°C. Damage is permanent.
Sensitization to coating
It is widely known that nickel (the usual finish) is a strong allergen. If your skin reacts to metals, avoid touching magnets with bare hands or choose versions in plastic housing.
Eye protection
NdFeB magnets are ceramic materials, which means they are very brittle. Collision of two magnets leads to them cracking into shards.
Do not underestimate power
Handle magnets with awareness. Their huge power can shock even professionals. Stay alert and do not underestimate their force.
Adults only
These products are not suitable for play. Swallowing multiple magnets may result in them connecting inside the digestive tract, which poses a critical condition and requires immediate surgery.
