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
bulk discounts:
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Technical parameters of the product - 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 product - report
These values are the direct effect of a engineering analysis. Results rely on algorithms for the material Nd2Fe14B. Operational conditions might slightly differ. Use these data as a preliminary roadmap when designing systems.
Table 1: Static pull force (pull vs distance) - characteristics
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
|
dangerous! |
| 1 mm |
3643 Gs
364.3 mT
|
163.71 kg / 360.93 LBS
163714.9 g / 1606.0 N
|
dangerous! |
| 2 mm |
3563 Gs
356.3 mT
|
156.65 kg / 345.35 LBS
156647.8 g / 1536.7 N
|
dangerous! |
| 3 mm |
3482 Gs
348.2 mT
|
149.55 kg / 329.71 LBS
149554.1 g / 1467.1 N
|
dangerous! |
| 5 mm |
3314 Gs
331.4 mT
|
135.46 kg / 298.63 LBS
135457.0 g / 1328.8 N
|
dangerous! |
| 10 mm |
2880 Gs
288.0 mT
|
102.34 kg / 225.63 LBS
102343.3 g / 1004.0 N
|
dangerous! |
| 15 mm |
2457 Gs
245.7 mT
|
74.47 kg / 164.17 LBS
74468.4 g / 730.5 N
|
dangerous! |
| 20 mm |
2069 Gs
206.9 mT
|
52.79 kg / 116.38 LBS
52789.9 g / 517.9 N
|
dangerous! |
| 30 mm |
1439 Gs
143.9 mT
|
25.53 kg / 56.29 LBS
25534.0 g / 250.5 N
|
dangerous! |
| 50 mm |
704 Gs
70.4 mT
|
6.11 kg / 13.48 LBS
6115.0 g / 60.0 N
|
medium risk |
Table 2: Slippage load (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: Wall mounting (shearing) - behavior on slippery surfaces
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) - 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 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: Working in heat (stability) - 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: Two magnets (attraction) - 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: Protective zones (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 |
| 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: Dynamics (kinetic energy) - 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: Corrosion resistance
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: Construction 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. Sliding resistance
*Warning: On a vertical wall, the magnet retains merely approx. 20-30% of its max power.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) severely reduces the holding force.
3. Temperature resistance
*For N38 grade, 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
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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other offers
Strengths and weaknesses of rare earth magnets.
Strengths
- They have constant strength, and over around 10 years their performance decreases symbolically – ~1% (according to theory),
- They are extremely resistant to demagnetization induced by presence of other magnetic fields,
- By using a lustrous coating of nickel, the element gains an proper look,
- They are known for high magnetic induction at the operating surface, which affects their effectiveness,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
- Thanks to freedom in shaping and the ability to customize to specific needs,
- Huge importance in innovative solutions – they are used in magnetic memories, drive modules, medical devices, as well as modern systems.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Disadvantages
- To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
- When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- They oxidize in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
- Due to limitations in producing nuts and complex shapes in magnets, we propose using a housing - magnetic mechanism.
- Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child health protection. Furthermore, small components of these devices are able to complicate diagnosis medical after entering the body.
- Due to neodymium price, their price is higher than average,
Pull force analysis
Maximum lifting force for a neodymium magnet – what affects it?
- with the contact of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
- whose transverse dimension reaches at least 10 mm
- with an ground touching surface
- under conditions of ideal adhesion (surface-to-surface)
- during pulling in a direction vertical to the mounting surface
- at temperature room level
What influences lifting capacity in practice
- Gap 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 – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
- Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
- Steel grade – ideal substrate is pure iron steel. Hardened steels may attract less.
- Base smoothness – the more even the plate, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
- Temperature – temperature increase results in weakening of induction. Check the thermal limit for a given model.
Lifting capacity testing was performed on a smooth plate of suitable thickness, under a perpendicular pulling force, in contrast under parallel forces the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate decreases the load capacity.
Precautions when working with neodymium magnets
Powerful field
Use magnets consciously. Their immense force can surprise even professionals. Stay alert and do not underestimate their power.
Keep away from children
NdFeB magnets are not toys. Eating a few magnets may result in them connecting inside the digestive tract, which poses a critical condition and necessitates urgent medical intervention.
Life threat
Medical warning: Neodymium magnets can deactivate pacemakers and defibrillators. Stay away if you have medical devices.
Demagnetization risk
Control the heat. Heating the magnet to high heat will ruin its properties and strength.
Protective goggles
Neodymium magnets are sintered ceramics, which means they are prone to chipping. Collision of two magnets leads to them cracking into shards.
Metal Allergy
It is widely known that the nickel plating (standard magnet coating) is a strong allergen. If your skin reacts to metals, avoid touching magnets with bare hands or choose versions in plastic housing.
GPS Danger
Remember: rare earth magnets generate a field that disrupts sensitive sensors. Maintain a safe distance from your phone, tablet, and navigation systems.
Do not drill into magnets
Dust produced during grinding of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.
Protect data
Powerful magnetic fields can corrupt files on payment cards, hard drives, and storage devices. Keep a distance of at least 10 cm.
Physical harm
Risk of injury: The attraction force is so great that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.
