MW 100x10 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010001
GTIN/EAN: 5906301810018
Diameter Ø
100 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
589.05 g
Magnetization Direction
↑ axial
Load capacity
40.86 kg / 400.80 N
Magnetic Induction
121.59 mT / 1216 Gs
Coating
[NiCuNi] Nickel
368.50 ZŁ with VAT / pcs + price for transport
299.59 ZŁ net + 23% VAT / pcs
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Product card - MW 100x10 / N38 - cylindrical magnet
Specification / characteristics - MW 100x10 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010001 |
| GTIN/EAN | 5906301810018 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 100 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 589.05 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 40.86 kg / 400.80 N |
| Magnetic Induction ~ ? | 121.59 mT / 1216 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 analysis of the assembly - data
The following information constitute the outcome of a engineering simulation. Values are based on models for the material Nd2Fe14B. Actual parameters might slightly deviate from the simulation results. Use these data as a supplementary guide when designing systems.
Table 1: Static pull force (force vs gap) - characteristics
MW 100x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
1216 Gs
121.6 mT
|
40.86 kg / 90.08 lbs
40860.0 g / 400.8 N
|
dangerous! |
| 1 mm |
1208 Gs
120.8 mT
|
40.35 kg / 88.95 lbs
40345.4 g / 395.8 N
|
dangerous! |
| 2 mm |
1199 Gs
119.9 mT
|
39.74 kg / 87.62 lbs
39742.7 g / 389.9 N
|
dangerous! |
| 3 mm |
1189 Gs
118.9 mT
|
39.06 kg / 86.12 lbs
39062.0 g / 383.2 N
|
dangerous! |
| 5 mm |
1165 Gs
116.5 mT
|
37.49 kg / 82.65 lbs
37490.2 g / 367.8 N
|
dangerous! |
| 10 mm |
1087 Gs
108.7 mT
|
32.64 kg / 71.96 lbs
32640.7 g / 320.2 N
|
dangerous! |
| 15 mm |
991 Gs
99.1 mT
|
27.15 kg / 59.86 lbs
27153.9 g / 266.4 N
|
dangerous! |
| 20 mm |
887 Gs
88.7 mT
|
21.76 kg / 47.97 lbs
21758.7 g / 213.5 N
|
dangerous! |
| 30 mm |
683 Gs
68.3 mT
|
12.90 kg / 28.45 lbs
12902.7 g / 126.6 N
|
dangerous! |
| 50 mm |
379 Gs
37.9 mT
|
3.97 kg / 8.75 lbs
3968.4 g / 38.9 N
|
strong |
Table 2: Vertical capacity (vertical surface)
MW 100x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
8.17 kg / 18.02 lbs
8172.0 g / 80.2 N
|
| 1 mm | Stal (~0.2) |
8.07 kg / 17.79 lbs
8070.0 g / 79.2 N
|
| 2 mm | Stal (~0.2) |
7.95 kg / 17.52 lbs
7948.0 g / 78.0 N
|
| 3 mm | Stal (~0.2) |
7.81 kg / 17.22 lbs
7812.0 g / 76.6 N
|
| 5 mm | Stal (~0.2) |
7.50 kg / 16.53 lbs
7498.0 g / 73.6 N
|
| 10 mm | Stal (~0.2) |
6.53 kg / 14.39 lbs
6528.0 g / 64.0 N
|
| 15 mm | Stal (~0.2) |
5.43 kg / 11.97 lbs
5430.0 g / 53.3 N
|
| 20 mm | Stal (~0.2) |
4.35 kg / 9.59 lbs
4352.0 g / 42.7 N
|
| 30 mm | Stal (~0.2) |
2.58 kg / 5.69 lbs
2580.0 g / 25.3 N
|
| 50 mm | Stal (~0.2) |
0.79 kg / 1.75 lbs
794.0 g / 7.8 N
|
Table 3: Vertical assembly (shearing) - vertical pull
MW 100x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
12.26 kg / 27.02 lbs
12258.0 g / 120.3 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
8.17 kg / 18.02 lbs
8172.0 g / 80.2 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
4.09 kg / 9.01 lbs
4086.0 g / 40.1 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
20.43 kg / 45.04 lbs
20430.0 g / 200.4 N
|
Table 4: Material efficiency (saturation) - sheet metal selection
MW 100x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
2.04 kg / 4.50 lbs
2043.0 g / 20.0 N
|
| 1 mm |
|
5.11 kg / 11.26 lbs
5107.5 g / 50.1 N
|
| 2 mm |
|
10.22 kg / 22.52 lbs
10215.0 g / 100.2 N
|
| 3 mm |
|
15.32 kg / 33.78 lbs
15322.5 g / 150.3 N
|
| 5 mm |
|
25.54 kg / 56.30 lbs
25537.5 g / 250.5 N
|
| 10 mm |
|
40.86 kg / 90.08 lbs
40860.0 g / 400.8 N
|
| 11 mm |
|
40.86 kg / 90.08 lbs
40860.0 g / 400.8 N
|
| 12 mm |
|
40.86 kg / 90.08 lbs
40860.0 g / 400.8 N
|
Table 5: Working in heat (stability) - resistance threshold
MW 100x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
40.86 kg / 90.08 lbs
40860.0 g / 400.8 N
|
OK |
| 40 °C | -2.2% |
39.96 kg / 88.10 lbs
39961.1 g / 392.0 N
|
OK |
| 60 °C | -4.4% |
39.06 kg / 86.12 lbs
39062.2 g / 383.2 N
|
|
| 80 °C | -6.6% |
38.16 kg / 84.14 lbs
38163.2 g / 374.4 N
|
|
| 100 °C | -28.8% |
29.09 kg / 64.14 lbs
29092.3 g / 285.4 N
|
Table 6: Two magnets (attraction) - forces in the system
MW 100x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
71.58 kg / 157.80 lbs
2 302 Gs
|
10.74 kg / 23.67 lbs
10737 g / 105.3 N
|
N/A |
| 1 mm |
71.15 kg / 156.86 lbs
2 424 Gs
|
10.67 kg / 23.53 lbs
10673 g / 104.7 N
|
64.04 kg / 141.17 lbs
~0 Gs
|
| 2 mm |
70.68 kg / 155.82 lbs
2 416 Gs
|
10.60 kg / 23.37 lbs
10602 g / 104.0 N
|
63.61 kg / 140.23 lbs
~0 Gs
|
| 3 mm |
70.17 kg / 154.69 lbs
2 408 Gs
|
10.53 kg / 23.20 lbs
10525 g / 103.3 N
|
63.15 kg / 139.22 lbs
~0 Gs
|
| 5 mm |
69.04 kg / 152.21 lbs
2 388 Gs
|
10.36 kg / 22.83 lbs
10356 g / 101.6 N
|
62.14 kg / 136.99 lbs
~0 Gs
|
| 10 mm |
65.68 kg / 144.79 lbs
2 329 Gs
|
9.85 kg / 21.72 lbs
9851 g / 96.6 N
|
59.11 kg / 130.31 lbs
~0 Gs
|
| 20 mm |
57.18 kg / 126.06 lbs
2 173 Gs
|
8.58 kg / 18.91 lbs
8577 g / 84.1 N
|
51.46 kg / 113.45 lbs
~0 Gs
|
| 50 mm |
29.67 kg / 65.40 lbs
1 565 Gs
|
4.45 kg / 9.81 lbs
4450 g / 43.7 N
|
26.70 kg / 58.86 lbs
~0 Gs
|
| 60 mm |
22.60 kg / 49.83 lbs
1 366 Gs
|
3.39 kg / 7.47 lbs
3390 g / 33.3 N
|
20.34 kg / 44.85 lbs
~0 Gs
|
| 70 mm |
16.98 kg / 37.43 lbs
1 184 Gs
|
2.55 kg / 5.61 lbs
2546 g / 25.0 N
|
15.28 kg / 33.68 lbs
~0 Gs
|
| 80 mm |
12.64 kg / 27.87 lbs
1 022 Gs
|
1.90 kg / 4.18 lbs
1896 g / 18.6 N
|
11.38 kg / 25.08 lbs
~0 Gs
|
| 90 mm |
9.38 kg / 20.67 lbs
880 Gs
|
1.41 kg / 3.10 lbs
1406 g / 13.8 N
|
8.44 kg / 18.60 lbs
~0 Gs
|
| 100 mm |
6.95 kg / 15.33 lbs
758 Gs
|
1.04 kg / 2.30 lbs
1043 g / 10.2 N
|
6.26 kg / 13.79 lbs
~0 Gs
|
Table 7: Safety (HSE) (implants) - warnings
MW 100x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 31.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 24.0 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 19.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 14.5 cm |
| Remote | 50 Gs (5.0 mT) | 13.5 cm |
| Payment card | 400 Gs (40.0 mT) | 5.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 3.5 cm |
Table 8: Dynamics (kinetic energy) - warning
MW 100x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
11.87 km/h
(3.30 m/s)
|
3.20 J | |
| 30 mm |
17.18 km/h
(4.77 m/s)
|
6.71 J | |
| 50 mm |
19.89 km/h
(5.52 m/s)
|
8.99 J | |
| 100 mm |
26.67 km/h
(7.41 m/s)
|
16.17 J |
Table 9: Coating parameters (durability)
MW 100x10 / 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 100x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 125 951 Mx | 1259.5 µWb |
| Pc Coefficient | 0.16 | Low (Flat) |
Table 11: Physics of underwater searching
MW 100x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 40.86 kg | Standard |
| Water (riverbed) |
46.78 kg
(+5.92 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Warning: On a vertical wall, the magnet holds merely approx. 20-30% of its nominal pull.
2. Steel thickness impact
*Thin metal sheet (e.g. computer case) significantly weakens the holding force.
3. Thermal stability
*For N38 material, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.16
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Strengths as well as weaknesses of Nd2Fe14B magnets.
Strengths
- They have stable power, and over nearly ten years their performance decreases symbolically – ~1% (according to theory),
- They are noted for resistance to demagnetization induced by external field influence,
- By using a shiny coating of gold, the element acquires an elegant look,
- They show high magnetic induction at the operating surface, making them more effective,
- 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...
- Possibility of detailed shaping as well as adjusting to atypical requirements,
- Fundamental importance in innovative solutions – they are commonly used in computer drives, drive modules, advanced medical instruments, and industrial machines.
- Thanks to concentrated force, small magnets offer high operating force, in miniature format,
Weaknesses
- Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a strong case, which not only protects them against impacts but also raises their durability
- We warn that neodymium magnets can lose their strength 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 rust. Therefore during using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Due to limitations in producing threads and complex forms in magnets, we propose using cover - magnetic mechanism.
- Possible danger related to microscopic parts of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child health protection. Furthermore, small elements of these products can disrupt the diagnostic process medical after entering the body.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities
Holding force characteristics
Detachment force of the magnet in optimal conditions – what it depends on?
- using a base made of high-permeability steel, functioning as a ideal flux conductor
- with a thickness no less than 10 mm
- with a plane free of scratches
- without the slightest clearance between the magnet and steel
- under vertical force vector (90-degree angle)
- in neutral thermal conditions
Key elements affecting lifting force
- Gap between magnet and steel – every millimeter of distance (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
- Pull-off angle – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
- Base massiveness – insufficiently thick plate does not close the flux, causing part of the flux to be escaped into the air.
- Steel type – low-carbon steel gives the best results. Alloy admixtures reduce magnetic permeability and lifting capacity.
- Surface finish – ideal contact is possible only on smooth steel. Rough texture create air cushions, reducing force.
- Heat – neodymium magnets have a sensitivity to temperature. When it is hot they are weaker, and in frost gain strength (up to a certain limit).
Lifting capacity was measured using a polished steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, in contrast under parallel forces the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the holding force.
H&S for magnets
Thermal limits
Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will permanently weaken its properties and strength.
Medical implants
People with a heart stimulator have to maintain an safe separation from magnets. The magnetism can stop the functioning of the implant.
Handling rules
Handle magnets with awareness. Their immense force can shock even experienced users. Be vigilant and respect their power.
Keep away from electronics
Navigation devices and smartphones are highly susceptible to magnetic fields. Direct contact with a strong magnet can permanently damage the sensors in your phone.
Risk of cracking
Watch out for shards. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. We recommend safety glasses.
Allergic reactions
Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If an allergic reaction appears, cease handling magnets and wear gloves.
Pinching danger
Protect your hands. Two powerful magnets will snap together immediately with a force of massive weight, destroying everything in their path. Be careful!
Dust explosion hazard
Fire hazard: Neodymium dust is explosive. Do not process magnets without safety gear as this may cause fire.
Safe distance
Intense magnetic fields can erase data on payment cards, hard drives, and storage devices. Maintain a gap of min. 10 cm.
Swallowing risk
Absolutely store magnets out of reach of children. Risk of swallowing is significant, and the consequences of magnets clamping inside the body are life-threatening.
