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
528.46 ZŁ net + 23% VAT / pcs
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Product card - 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 - data
These data constitute the result of a mathematical calculation. Values were calculated on algorithms for the class Nd2Fe14B. Actual performance may differ from theoretical values. Please consider these data as a supplementary guide for designers.
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
|
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 (shearing) - 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 (saturation) - 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 stability (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: Magnet-Magnet interaction (attraction) - forces in the system
MW 100x30 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (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) (implants) - 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 |
| Car key | 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 (cracking risk) - collision effects
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. Sliding resistance
*Warning: On a vertical surface, the magnet holds only a fraction of its max power.
2. Efficiency vs thickness
*Thin steel (e.g. computer case) drastically reduces the holding force.
3. Heat tolerance
*For standard magnets, 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
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 |
Check out also products
Strengths as well as weaknesses of neodymium magnets.
Advantages
- They virtually do not lose power, because even after 10 years the performance loss is only ~1% (in laboratory conditions),
- They retain their magnetic properties even under strong external field,
- The use of an aesthetic layer of noble metals (nickel, gold, silver) causes the element to look better,
- Magnets are characterized by exceptionally strong magnetic induction on the outer side,
- Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
- Thanks to flexibility in constructing and the ability to adapt to unusual requirements,
- Key role in electronics industry – they serve a role in magnetic memories, electromotive mechanisms, advanced medical instruments, as well as multitasking production systems.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which makes them useful in compact constructions
Weaknesses
- They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
- When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their strength 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
- Magnets exposed to a humid environment can rust. Therefore during using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
- We suggest cover - magnetic holder, due to difficulties in creating threads inside the magnet and complex forms.
- Health risk to health – tiny shards of magnets pose a threat, if swallowed, which becomes key in the context of child health protection. It is also worth noting that small elements of these products are able to disrupt the diagnostic process medical after entering the body.
- With mass production the cost of neodymium magnets is a challenge,
Lifting parameters
Optimal lifting capacity of a neodymium magnet – what affects it?
- with the contact of a yoke made of low-carbon steel, ensuring maximum field concentration
- with a thickness no less than 10 mm
- with a surface cleaned and smooth
- with direct contact (no coatings)
- for force applied at a right angle (in the magnet axis)
- at room temperature
Practical aspects of lifting capacity – factors
- Gap (between the magnet and the plate), since even a microscopic clearance (e.g. 0.5 mm) results in a reduction in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
- Loading method – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
- Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
- Plate material – mild steel gives the best results. Alloy admixtures decrease magnetic permeability and holding force.
- Surface condition – ground elements guarantee perfect abutment, which increases force. Uneven metal weaken the grip.
- Thermal factor – high temperature reduces pulling force. Too high temperature can permanently demagnetize the magnet.
Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, however under shearing force the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet’s surface and the plate reduces the lifting capacity.
Safety rules for work with neodymium magnets
Pinching danger
Mind your fingers. Two powerful magnets will snap together immediately with a force of massive weight, destroying everything in their path. Be careful!
Health Danger
People with a ICD should keep an safe separation from magnets. The magnetism can disrupt the functioning of the implant.
Cards and drives
Equipment safety: Strong magnets can ruin payment cards and sensitive devices (pacemakers, hearing aids, mechanical watches).
Magnets are brittle
Watch out for shards. Magnets can explode upon violent connection, launching sharp fragments into the air. Eye protection is mandatory.
Product not for children
Always store magnets away from children. Choking hazard is high, and the consequences of magnets connecting inside the body are life-threatening.
Impact on smartphones
Remember: neodymium magnets produce a field that disrupts precision electronics. Keep a safe distance from your mobile, tablet, and navigation systems.
Mechanical processing
Combustion risk: Neodymium dust is explosive. Avoid machining magnets without safety gear as this risks ignition.
Warning for allergy sufferers
Nickel alert: The nickel-copper-nickel coating consists of nickel. If an allergic reaction occurs, cease working with magnets and use protective gear.
Handling rules
Before use, read the rules. Sudden snapping can break the magnet or injure your hand. Be predictive.
Demagnetization risk
Avoid heat. NdFeB magnets are susceptible to temperature. If you require operation above 80°C, inquire about special high-temperature series (H, SH, UH).
