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
- Coating
- [NiCuNi] Nickel
650.01 zł with VAT / pcs + price for transport
528.46 zł net + 23% VAT / pcs
bulk discounts:
Need more?Engineering report for this magnet
Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.
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Technical specification of the product - 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 |
Technical modeling of the assembly - technical parameters
The following values constitute the outcome of a physical simulation. Results are based on models for the class Nd2Fe14B. Operational parameters might slightly differ from theoretical values. Please consider these data as a supplementary guide when designing systems.
Table 1: Static pull force (force vs gap) - interaction chart
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
|
dangerous! |
| 1 mm |
3143 Gs
314.3 mT
|
208.96 kg / 460.68 LBS
208959.6 g / 2049.9 N
|
dangerous! |
| 2 mm |
3094 Gs
309.4 mT
|
202.53 kg / 446.51 LBS
202531.7 g / 1986.8 N
|
dangerous! |
| 3 mm |
3044 Gs
304.4 mT
|
195.98 kg / 432.07 LBS
195982.5 g / 1922.6 N
|
dangerous! |
| 5 mm |
2939 Gs
293.9 mT
|
182.65 kg / 402.68 LBS
182651.7 g / 1791.8 N
|
dangerous! |
| 10 mm |
2657 Gs
265.7 mT
|
149.35 kg / 329.26 LBS
149349.8 g / 1465.1 N
|
dangerous! |
| 15 mm |
2366 Gs
236.6 mT
|
118.41 kg / 261.05 LBS
118412.6 g / 1161.6 N
|
dangerous! |
| 20 mm |
2081 Gs
208.1 mT
|
91.64 kg / 202.03 LBS
91640.5 g / 899.0 N
|
dangerous! |
| 30 mm |
1573 Gs
157.3 mT
|
52.34 kg / 115.40 LBS
52344.5 g / 513.5 N
|
dangerous! |
| 50 mm |
874 Gs
87.4 mT
|
16.14 kg / 35.58 LBS
16140.3 g / 158.3 N
|
dangerous! |
Table 2: Shear load (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 (sliding) - vertical pull
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) - power losses
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 (stability) - 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: Two magnets (attraction) - field range
MW 100x30 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral 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: Safety (HSE) (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 |
| Timepiece | 20 Gs (2.0 mT) | 27.0 cm |
| Phone / Smartphone | 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: Impact energy (cracking risk) - warning
MW 100x30 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
16.21 km/h
(4.50 m/s)
|
17.91 J | |
| 30 mm |
23.14 km/h
(6.43 m/s)
|
36.50 J | |
| 50 mm |
24.98 km/h
(6.94 m/s)
|
42.54 J | |
| 100 mm |
25.76 km/h
(7.16 m/s)
|
45.24 J |
Table 9: Coating parameters (durability)
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 (Pc)
MW 100x30 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 269 425 Mx | 2694.3 µWb |
| Pc Coefficient | 0.40 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
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. Wall mount (shear)
*Note: On a vertical wall, the magnet retains only ~20% of its nominal pull.
2. Plate thickness effect
*Thin metal sheet (e.g. computer case) drastically weakens the holding force.
3. Thermal stability
*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.
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
See also offers
Strengths as well as weaknesses of Nd2Fe14B magnets.
Benefits
- They have stable power, and over nearly 10 years their performance decreases symbolically – ~1% (according to theory),
- They are extremely resistant to demagnetization induced by external magnetic fields,
- In other words, due to the glossy finish of gold, the element gains a professional look,
- The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
- Thanks to the ability of free molding and adaptation to unique needs, NdFeB magnets can be created in a variety of shapes and sizes, which expands the range of possible applications,
- Huge importance in advanced technology sectors – they serve a role in hard drives, electric motors, medical equipment, also complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which enables their usage in miniature devices
Cons
- They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also improves its resistance to damage
- We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 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 resistant to moisture, when using outdoors
- Due to limitations in creating nuts and complicated shapes in magnets, we propose using casing - magnetic holder.
- Potential hazard resulting from small fragments of magnets can be dangerous, if swallowed, which becomes key in the context of child health protection. Additionally, tiny parts of these magnets can disrupt the diagnostic process medical after entering the body.
- With budget limitations the cost of neodymium magnets can be a barrier,
Holding force characteristics
Maximum magnetic pulling force – what contributes to it?
- using a sheet made of mild steel, functioning as a magnetic yoke
- with a cross-section no less than 10 mm
- with a plane cleaned and smooth
- with total lack of distance (without paint)
- under axial force vector (90-degree angle)
- at ambient temperature room level
Magnet lifting force in use – key factors
- Gap (betwixt the magnet and the plate), as even a very small distance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to varnish, corrosion or dirt).
- Force direction – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
- Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of generating force.
- Chemical composition of the base – low-carbon steel gives the best results. Higher carbon content reduce magnetic properties and holding force.
- Surface quality – the more even the surface, the better the adhesion and higher the lifting capacity. Unevenness acts like micro-gaps.
- Thermal conditions – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and in frost gain strength (up to a certain limit).
Lifting capacity testing was performed on a smooth plate of suitable thickness, under perpendicular forces, however 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.
Safe handling of NdFeB magnets
Magnetic media
Intense magnetic fields can destroy records on payment cards, hard drives, and storage devices. Maintain a gap of min. 10 cm.
Magnets are brittle
Despite the nickel coating, the material is delicate and cannot withstand shocks. Do not hit, as the magnet may crumble into sharp, dangerous pieces.
Thermal limits
Standard neodymium magnets (N-type) lose magnetization when the temperature goes above 80°C. This process is irreversible.
Choking Hazard
Neodymium magnets are not toys. Accidental ingestion of several magnets may result in them connecting inside the digestive tract, which constitutes a critical condition and necessitates immediate surgery.
Phone sensors
Note: rare earth magnets produce a field that confuses precision electronics. Keep a separation from your mobile, device, and GPS.
Sensitization to coating
Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction happens, immediately stop handling magnets and use protective gear.
Combustion hazard
Combustion risk: Rare earth powder is highly flammable. Do not process magnets in home conditions as this may cause fire.
Crushing force
Pinching hazard: The attraction force is so great that it can cause blood blisters, pinching, and broken bones. Use thick gloves.
Implant safety
For implant holders: Powerful magnets disrupt medical devices. Maintain at least 30 cm distance or request help to handle the magnets.
Safe operation
Be careful. Rare earth magnets act from a distance and snap with huge force, often quicker than you can move away.
