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:
Need more?
Give us a call
+48 888 99 98 98
alternatively contact us through
request form
our website.
Force along with structure of a neodymium magnet can be verified with our
modular calculator.
Same-day shipping for orders placed before 14:00.
Technical 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 |
Physical modeling of the product - report
These data constitute the outcome of a mathematical calculation. Values rely on algorithms for the class Nd2Fe14B. Actual performance might slightly deviate from the simulation results. Please consider these data as a supplementary guide during assembly planning.
Table 1: Static pull 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 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
|
medium risk |
Table 2: Shear 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 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: Vertical assembly (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 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 (substrate influence) - power losses
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: Thermal resistance (stability) - resistance threshold
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: Magnet-Magnet interaction (repulsion) - field collision
MW 80x30 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (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: Protective zones (electronics) - 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: Collisions (kinetic energy) - 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 (Pc)
MW 80x30 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 194 600 Mx | 1946.0 µWb |
| Pc Coefficient | 0.48 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
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. Shear force
*Warning: On a vertical wall, the magnet retains just a fraction of its nominal pull.
2. Plate thickness effect
*Thin steel (e.g. computer case) severely reduces the holding force.
3. Temperature resistance
*For standard magnets, 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.
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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other products
Pros as well as cons of Nd2Fe14B magnets.
Advantages
- They have constant strength, and over more than 10 years their attraction force decreases symbolically – ~1% (according to theory),
- Neodymium magnets are highly resistant to loss of magnetic properties caused by magnetic disturbances,
- Thanks to the shimmering finish, the coating of nickel, gold-plated, or silver gives an clean appearance,
- Magnetic induction on the surface of the magnet is maximum,
- Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
- Thanks to modularity in shaping and the ability to customize to unusual requirements,
- Key role in advanced technology sectors – they are used in hard drives, electric motors, medical equipment, as well as other advanced devices.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Disadvantages
- Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a strong case, which not only secures them against impacts but also increases their durability
- We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
- Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
- Due to limitations in producing nuts and complicated shapes in magnets, we propose using cover - magnetic mechanism.
- Health risk related to microscopic parts of magnets are risky, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these devices can complicate diagnosis medical when they are in the body.
- Due to expensive raw materials, their price is higher than average,
Lifting parameters
Detachment force of the magnet in optimal conditions – what contributes to it?
- with the use of a sheet made of special test steel, ensuring full magnetic saturation
- possessing a massiveness of at least 10 mm to avoid saturation
- with an polished contact surface
- under conditions of gap-free contact (surface-to-surface)
- for force applied at a right angle (in the magnet axis)
- in neutral thermal conditions
Determinants of lifting force in real conditions
- Clearance – existence of foreign body (paint, dirt, air) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
- Force direction – note 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 – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of converting into lifting capacity.
- Steel grade – the best choice is pure iron steel. Cast iron may have worse magnetic properties.
- Surface structure – the smoother and more polished the surface, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
- Thermal factor – hot environment weakens pulling force. Too high temperature can permanently demagnetize the magnet.
Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas under shearing force the lifting capacity is smaller. In addition, even a small distance between the magnet’s surface and the plate decreases the holding force.
Safe handling of neodymium magnets
Eye protection
Protect your eyes. Magnets can fracture upon uncontrolled impact, launching shards into the air. Wear goggles.
Life threat
Patients with a ICD must maintain an safe separation from magnets. The magnetism can interfere with the operation of the implant.
Serious injuries
Protect your hands. Two powerful magnets will snap together immediately with a force of several hundred kilograms, crushing anything in their path. Be careful!
Do not give to children
Absolutely keep magnets out of reach of children. Choking hazard is significant, and the effects of magnets connecting inside the body are very dangerous.
Handling rules
Before use, check safety instructions. Sudden snapping can destroy the magnet or hurt your hand. Be predictive.
Impact on smartphones
Remember: neodymium magnets generate a field that disrupts sensitive sensors. Keep a separation from your phone, tablet, and navigation systems.
Warning for allergy sufferers
Nickel alert: The Ni-Cu-Ni coating contains nickel. If an allergic reaction happens, cease handling magnets and use protective gear.
Permanent damage
Regular neodymium magnets (grade N) lose power when the temperature surpasses 80°C. Damage is permanent.
Combustion hazard
Dust generated during cutting of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.
Protect data
Very strong magnetic fields can erase data on credit cards, hard drives, and other magnetic media. Stay away of at least 10 cm.
