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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Physical properties - 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 simulation of the magnet - report
The following values constitute the direct effect of a engineering calculation. Values were calculated on algorithms for the class Nd2Fe14B. Actual conditions may differ from theoretical values. Treat these calculations as a reference point for designers.
Table 1: Static pull 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 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
|
warning |
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 (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 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 (repulsion) - field range
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 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: Safety (HSE) (electronics) - warnings
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 |
| Phone / Smartphone | 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: Anti-corrosion coating 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: 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. Wall mount (shear)
*Note: On a vertical surface, the magnet retains just a fraction of its perpendicular strength.
2. Steel saturation
*Thin steel (e.g. 0.5mm PC case) significantly limits the holding force.
3. Thermal stability
*For standard magnets, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.48
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.
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 offers
Pros as well as cons of rare earth magnets.
Strengths
- They do not lose power, even during nearly 10 years – the reduction in lifting capacity is only ~1% (based on measurements),
- Neodymium magnets are extremely resistant to loss of magnetic properties caused by magnetic disturbances,
- The use of an metallic layer of noble metals (nickel, gold, silver) causes the element to have aesthetics,
- They are known for high magnetic induction at the operating surface, which increases their power,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Possibility of exact shaping and adjusting to concrete requirements,
- Wide application in modern industrial fields – they find application in mass storage devices, electromotive mechanisms, diagnostic systems, as well as modern systems.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Cons
- At very strong impacts they can crack, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's 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
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
- Limited ability of creating nuts in the magnet and complicated forms - preferred is casing - mounting mechanism.
- Health risk related to microscopic parts of magnets are risky, if swallowed, which becomes key in the context of child safety. Furthermore, small elements of these products can be problematic in diagnostics medical when they are in the body.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities
Holding force characteristics
Breakaway strength of the magnet in ideal conditions – what it depends on?
- on a block made of structural steel, effectively closing the magnetic field
- whose transverse dimension reaches at least 10 mm
- characterized by smoothness
- with direct contact (no paint)
- for force acting at a right angle (in the magnet axis)
- at standard ambient temperature
What influences lifting capacity in practice
- Gap between surfaces – every millimeter of separation (caused e.g. by veneer or unevenness) drastically reduces 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 significantly, often to levels of 20-30% of the nominal value.
- Base massiveness – too thin sheet does not accept the full field, causing part of the flux to be lost into the air.
- Steel type – low-carbon steel gives the best results. Higher carbon content decrease magnetic permeability and holding force.
- Plate texture – ground elements guarantee perfect abutment, which increases force. Uneven metal reduce efficiency.
- Temperature – temperature increase causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.
Lifting capacity testing was carried out on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under parallel forces the holding force is lower. Moreover, even a small distance between the magnet’s surface and the plate reduces the load capacity.
Warnings
Hand protection
Protect your hands. Two large magnets will snap together instantly with a force of massive weight, crushing everything in their path. Exercise extreme caution!
Permanent damage
Avoid heat. NdFeB magnets are sensitive to temperature. If you require operation above 80°C, ask us about HT versions (H, SH, UH).
Safe distance
Avoid bringing magnets near a purse, laptop, or screen. The magnetism can permanently damage these devices and wipe information from cards.
Dust is flammable
Mechanical processing of NdFeB material carries a risk of fire risk. Neodymium dust reacts violently with oxygen and is hard to extinguish.
Skin irritation risks
Medical facts indicate that nickel (the usual finish) is a strong allergen. If your skin reacts to metals, refrain from touching magnets with bare hands and choose coated magnets.
Beware of splinters
Watch out for shards. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. Eye protection is mandatory.
Magnetic interference
GPS units and mobile phones are extremely sensitive to magnetism. Direct contact with a powerful NdFeB magnet can permanently damage the internal compass in your phone.
Handling guide
Before starting, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.
Do not give to children
Always store magnets away from children. Choking hazard is high, and the consequences of magnets clamping inside the body are fatal.
Medical interference
People with a ICD must maintain an large gap from magnets. The magnetism can interfere with the functioning of the implant.
