MW 100x30 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010002
GTIN/EAN: 5906301810025
Diameter Ø
100 mm [±0,1 mm]
Height
30 mm [±0,1 mm]
Weight
1767.15 g
Magnetization Direction
↑ axial
Load capacity
215.17 kg / 2110.78 N
Magnetic Induction
318.96 mT / 3190 Gs
Coating
[NiCuNi] Nickel
650.01 ZŁ with VAT / pcs + price for transport
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Technical parameters - MW 100x30 / N38 - cylindrical magnet
Specification / characteristics - MW 100x30 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010002 |
| GTIN/EAN | 5906301810025 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 100 mm [±0,1 mm] |
| Height | 30 mm [±0,1 mm] |
| Weight | 1767.15 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 215.17 kg / 2110.78 N |
| Magnetic Induction ~ ? | 318.96 mT / 3190 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 product - data
Presented values constitute the outcome of a engineering analysis. Values are based on algorithms for the class Nd2Fe14B. Actual performance might slightly differ from theoretical values. Use these data as a reference point when designing systems.
Table 1: Static pull force (pull vs distance) - power drop
MW 100x30 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3189 Gs
318.9 mT
|
215.17 kg / 474.37 LBS
215170.0 g / 2110.8 N
|
crushing |
| 1 mm |
3143 Gs
314.3 mT
|
208.96 kg / 460.68 LBS
208959.6 g / 2049.9 N
|
crushing |
| 2 mm |
3094 Gs
309.4 mT
|
202.53 kg / 446.51 LBS
202531.7 g / 1986.8 N
|
crushing |
| 3 mm |
3044 Gs
304.4 mT
|
195.98 kg / 432.07 LBS
195982.5 g / 1922.6 N
|
crushing |
| 5 mm |
2939 Gs
293.9 mT
|
182.65 kg / 402.68 LBS
182651.7 g / 1791.8 N
|
crushing |
| 10 mm |
2657 Gs
265.7 mT
|
149.35 kg / 329.26 LBS
149349.8 g / 1465.1 N
|
crushing |
| 15 mm |
2366 Gs
236.6 mT
|
118.41 kg / 261.05 LBS
118412.6 g / 1161.6 N
|
crushing |
| 20 mm |
2081 Gs
208.1 mT
|
91.64 kg / 202.03 LBS
91640.5 g / 899.0 N
|
crushing |
| 30 mm |
1573 Gs
157.3 mT
|
52.34 kg / 115.40 LBS
52344.5 g / 513.5 N
|
crushing |
| 50 mm |
874 Gs
87.4 mT
|
16.14 kg / 35.58 LBS
16140.3 g / 158.3 N
|
crushing |
Table 2: Shear capacity (wall)
MW 100x30 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
43.03 kg / 94.87 LBS
43034.0 g / 422.2 N
|
| 1 mm | Stal (~0.2) |
41.79 kg / 92.14 LBS
41792.0 g / 410.0 N
|
| 2 mm | Stal (~0.2) |
40.51 kg / 89.30 LBS
40506.0 g / 397.4 N
|
| 3 mm | Stal (~0.2) |
39.20 kg / 86.41 LBS
39196.0 g / 384.5 N
|
| 5 mm | Stal (~0.2) |
36.53 kg / 80.53 LBS
36530.0 g / 358.4 N
|
| 10 mm | Stal (~0.2) |
29.87 kg / 65.85 LBS
29870.0 g / 293.0 N
|
| 15 mm | Stal (~0.2) |
23.68 kg / 52.21 LBS
23682.0 g / 232.3 N
|
| 20 mm | Stal (~0.2) |
18.33 kg / 40.41 LBS
18328.0 g / 179.8 N
|
| 30 mm | Stal (~0.2) |
10.47 kg / 23.08 LBS
10468.0 g / 102.7 N
|
| 50 mm | Stal (~0.2) |
3.23 kg / 7.12 LBS
3228.0 g / 31.7 N
|
Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 100x30 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
64.55 kg / 142.31 LBS
64551.0 g / 633.2 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
43.03 kg / 94.87 LBS
43034.0 g / 422.2 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
21.52 kg / 47.44 LBS
21517.0 g / 211.1 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
107.59 kg / 237.18 LBS
107585.0 g / 1055.4 N
|
Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 100x30 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
7.17 kg / 15.81 LBS
7172.3 g / 70.4 N
|
| 1 mm |
|
17.93 kg / 39.53 LBS
17930.8 g / 175.9 N
|
| 2 mm |
|
35.86 kg / 79.06 LBS
35861.7 g / 351.8 N
|
| 3 mm |
|
53.79 kg / 118.59 LBS
53792.5 g / 527.7 N
|
| 5 mm |
|
89.65 kg / 197.65 LBS
89654.2 g / 879.5 N
|
| 10 mm |
|
179.31 kg / 395.31 LBS
179308.3 g / 1759.0 N
|
| 11 mm |
|
197.24 kg / 434.84 LBS
197239.2 g / 1934.9 N
|
| 12 mm |
|
215.17 kg / 474.37 LBS
215170.0 g / 2110.8 N
|
Table 5: Thermal resistance (material behavior) - power drop
MW 100x30 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
215.17 kg / 474.37 LBS
215170.0 g / 2110.8 N
|
OK |
| 40 °C | -2.2% |
210.44 kg / 463.93 LBS
210436.3 g / 2064.4 N
|
OK |
| 60 °C | -4.4% |
205.70 kg / 453.50 LBS
205702.5 g / 2017.9 N
|
|
| 80 °C | -6.6% |
200.97 kg / 443.06 LBS
200968.8 g / 1971.5 N
|
|
| 100 °C | -28.8% |
153.20 kg / 337.75 LBS
153201.0 g / 1502.9 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 100x30 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
492.55 kg / 1085.88 LBS
4 762 Gs
|
73.88 kg / 162.88 LBS
73882 g / 724.8 N
|
N/A |
| 1 mm |
485.56 kg / 1070.47 LBS
6 333 Gs
|
72.83 kg / 160.57 LBS
72834 g / 714.5 N
|
437.00 kg / 963.42 LBS
~0 Gs
|
| 2 mm |
478.33 kg / 1054.54 LBS
6 286 Gs
|
71.75 kg / 158.18 LBS
71749 g / 703.9 N
|
430.50 kg / 949.08 LBS
~0 Gs
|
| 3 mm |
471.01 kg / 1038.40 LBS
6 238 Gs
|
70.65 kg / 155.76 LBS
70652 g / 693.1 N
|
423.91 kg / 934.56 LBS
~0 Gs
|
| 5 mm |
456.15 kg / 1005.64 LBS
6 139 Gs
|
68.42 kg / 150.85 LBS
68422 g / 671.2 N
|
410.53 kg / 905.07 LBS
~0 Gs
|
| 10 mm |
418.11 kg / 921.77 LBS
5 877 Gs
|
62.72 kg / 138.27 LBS
62716 g / 615.2 N
|
376.30 kg / 829.59 LBS
~0 Gs
|
| 20 mm |
341.88 kg / 753.71 LBS
5 314 Gs
|
51.28 kg / 113.06 LBS
51282 g / 503.1 N
|
307.69 kg / 678.34 LBS
~0 Gs
|
| 50 mm |
159.49 kg / 351.61 LBS
3 630 Gs
|
23.92 kg / 52.74 LBS
23923 g / 234.7 N
|
143.54 kg / 316.45 LBS
~0 Gs
|
| 60 mm |
119.82 kg / 264.16 LBS
3 146 Gs
|
17.97 kg / 39.62 LBS
17973 g / 176.3 N
|
107.84 kg / 237.75 LBS
~0 Gs
|
| 70 mm |
89.40 kg / 197.09 LBS
2 718 Gs
|
13.41 kg / 29.56 LBS
13410 g / 131.6 N
|
80.46 kg / 177.38 LBS
~0 Gs
|
| 80 mm |
66.51 kg / 146.64 LBS
2 344 Gs
|
9.98 kg / 22.00 LBS
9977 g / 97.9 N
|
59.86 kg / 131.97 LBS
~0 Gs
|
| 90 mm |
49.50 kg / 109.14 LBS
2 022 Gs
|
7.43 kg / 16.37 LBS
7426 g / 72.8 N
|
44.55 kg / 98.22 LBS
~0 Gs
|
| 100 mm |
36.95 kg / 81.45 LBS
1 747 Gs
|
5.54 kg / 12.22 LBS
5542 g / 54.4 N
|
33.25 kg / 73.31 LBS
~0 Gs
|
Table 7: Hazards (electronics) - precautionary measures
MW 100x30 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 44.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 34.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 27.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 21.0 cm |
| Remote | 50 Gs (5.0 mT) | 19.0 cm |
| Payment card | 400 Gs (40.0 mT) | 8.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 6.5 cm |
Table 8: Collisions (kinetic energy) - warning
MW 100x30 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
15.21 km/h
(4.22 m/s)
|
15.77 J | |
| 30 mm |
22.01 km/h
(6.11 m/s)
|
33.03 J | |
| 50 mm |
26.02 km/h
(7.23 m/s)
|
46.17 J | |
| 100 mm |
35.32 km/h
(9.81 m/s)
|
85.04 J |
Table 9: Corrosion resistance
MW 100x30 / 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 100x30 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 269 425 Mx | 2694.3 µWb |
| Pc Coefficient | 0.40 | Low (Flat) |
Table 11: Submerged application
MW 100x30 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 215.17 kg | Standard |
| Water (riverbed) |
246.37 kg
(+31.20 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Caution: On a vertical surface, the magnet retains just approx. 20-30% of its max power.
2. Efficiency vs thickness
*Thin steel (e.g. 0.5mm PC case) significantly 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) = 0.40
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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other deals
Strengths and weaknesses of Nd2Fe14B magnets.
Pros
- They have constant strength, and over nearly 10 years their attraction force decreases symbolically – ~1% (in testing),
- Neodymium magnets are characterized by highly resistant to loss of magnetic properties caused by external field sources,
- A magnet with a smooth silver surface is more attractive,
- The surface of neodymium magnets generates a strong magnetic field – this is a key feature,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
- Thanks to the option of precise forming and customization to custom needs, neodymium magnets can be modeled in a wide range of forms and dimensions, which expands the range of possible applications,
- Significant place in modern technologies – they are used in data components, electromotive mechanisms, medical equipment, also modern systems.
- Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which enables their usage in compact constructions
Disadvantages
- At strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
- Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
- When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation as well as corrosion.
- We suggest casing - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complicated shapes.
- Possible danger related to microscopic parts of magnets pose a threat, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, small components of these magnets are able to 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
Holding force characteristics
Magnetic strength at its maximum – what it depends on?
- on a block made of structural steel, effectively closing the magnetic field
- with a cross-section minimum 10 mm
- with a plane cleaned and smooth
- with direct contact (no paint)
- during detachment in a direction perpendicular to the mounting surface
- in stable room temperature
What influences lifting capacity in practice
- Space between magnet and steel – every millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
- Loading method – declared lifting capacity refers to detachment vertically. When slipping, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
- Steel thickness – insufficiently thick plate does not accept the full field, causing part of the flux to be wasted to the other side.
- Chemical composition of the base – low-carbon steel attracts best. Higher carbon content lower magnetic properties and holding force.
- Surface condition – ground elements ensure maximum contact, which improves field saturation. Rough surfaces weaken the grip.
- Thermal factor – high temperature weakens magnetic field. Too high temperature can permanently damage the magnet.
Lifting capacity was measured using a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, whereas under attempts to slide the magnet the holding force is lower. In addition, even a small distance between the magnet and the plate lowers the load capacity.
Warnings
Implant safety
For implant holders: Strong magnetic fields disrupt electronics. Maintain at least 30 cm distance or ask another person to work with the magnets.
Metal Allergy
A percentage of the population suffer from a contact allergy to Ni, which is the common plating for NdFeB magnets. Frequent touching might lead to an allergic reaction. We recommend use safety gloves.
Handling guide
Be careful. Rare earth magnets attract from a long distance and snap with huge force, often faster than you can move away.
Shattering risk
Watch out for shards. Magnets can fracture upon violent connection, ejecting shards into the air. Eye protection is mandatory.
Flammability
Mechanical processing of neodymium magnets carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.
Adults only
Absolutely store magnets away from children. Choking hazard is significant, and the effects of magnets clamping inside the body are very dangerous.
Data carriers
Powerful magnetic fields can erase data on payment cards, hard drives, and storage devices. Keep a distance of min. 10 cm.
Maximum temperature
Standard neodymium magnets (grade N) lose power when the temperature exceeds 80°C. This process is irreversible.
Compass and GPS
An intense magnetic field negatively affects the functioning of compasses in smartphones and navigation systems. Do not bring magnets near a smartphone to avoid damaging the sensors.
Crushing risk
Danger of trauma: The attraction force is so great that it can result in hematomas, crushing, and even bone fractures. Use thick gloves.
