MW 38x15 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010061
GTIN/EAN: 5906301810605
Diameter Ø
38 mm [±0,1 mm]
Height
15 mm [±0,1 mm]
Weight
127.59 g
Magnetization Direction
↑ axial
Load capacity
40.08 kg / 393.18 N
Magnetic Induction
384.07 mT / 3841 Gs
Coating
[NiCuNi] Nickel
70.00 ZŁ with VAT / pcs + price for transport
56.91 ZŁ net + 23% VAT / pcs
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Technical details - MW 38x15 / N38 - cylindrical magnet
Specification / characteristics - MW 38x15 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010061 |
| GTIN/EAN | 5906301810605 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 38 mm [±0,1 mm] |
| Height | 15 mm [±0,1 mm] |
| Weight | 127.59 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 40.08 kg / 393.18 N |
| Magnetic Induction ~ ? | 384.07 mT / 3841 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 simulation of the magnet - report
These information constitute the result of a mathematical simulation. Values are based on models for the class Nd2Fe14B. Operational conditions might slightly deviate from the simulation results. Treat these data as a reference point when designing systems.
Table 1: Static force (force vs distance) - interaction chart
MW 38x15 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3840 Gs
384.0 mT
|
40.08 kg / 88.36 pounds
40080.0 g / 393.2 N
|
dangerous! |
| 1 mm |
3668 Gs
366.8 mT
|
36.56 kg / 80.61 pounds
36563.4 g / 358.7 N
|
dangerous! |
| 2 mm |
3485 Gs
348.5 mT
|
33.01 kg / 72.78 pounds
33011.6 g / 323.8 N
|
dangerous! |
| 3 mm |
3297 Gs
329.7 mT
|
29.55 kg / 65.14 pounds
29545.5 g / 289.8 N
|
dangerous! |
| 5 mm |
2917 Gs
291.7 mT
|
23.13 kg / 50.99 pounds
23128.9 g / 226.9 N
|
dangerous! |
| 10 mm |
2049 Gs
204.9 mT
|
11.41 kg / 25.15 pounds
11406.3 g / 111.9 N
|
dangerous! |
| 15 mm |
1396 Gs
139.6 mT
|
5.30 kg / 11.68 pounds
5297.4 g / 52.0 N
|
medium risk |
| 20 mm |
954 Gs
95.4 mT
|
2.47 kg / 5.45 pounds
2473.1 g / 24.3 N
|
medium risk |
| 30 mm |
474 Gs
47.4 mT
|
0.61 kg / 1.35 pounds
610.3 g / 6.0 N
|
weak grip |
| 50 mm |
155 Gs
15.5 mT
|
0.07 kg / 0.14 pounds
65.6 g / 0.6 N
|
weak grip |
Table 2: Slippage force (wall)
MW 38x15 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
8.02 kg / 17.67 pounds
8016.0 g / 78.6 N
|
| 1 mm | Stal (~0.2) |
7.31 kg / 16.12 pounds
7312.0 g / 71.7 N
|
| 2 mm | Stal (~0.2) |
6.60 kg / 14.55 pounds
6602.0 g / 64.8 N
|
| 3 mm | Stal (~0.2) |
5.91 kg / 13.03 pounds
5910.0 g / 58.0 N
|
| 5 mm | Stal (~0.2) |
4.63 kg / 10.20 pounds
4626.0 g / 45.4 N
|
| 10 mm | Stal (~0.2) |
2.28 kg / 5.03 pounds
2282.0 g / 22.4 N
|
| 15 mm | Stal (~0.2) |
1.06 kg / 2.34 pounds
1060.0 g / 10.4 N
|
| 20 mm | Stal (~0.2) |
0.49 kg / 1.09 pounds
494.0 g / 4.8 N
|
| 30 mm | Stal (~0.2) |
0.12 kg / 0.27 pounds
122.0 g / 1.2 N
|
| 50 mm | Stal (~0.2) |
0.01 kg / 0.03 pounds
14.0 g / 0.1 N
|
Table 3: Wall mounting (shearing) - vertical pull
MW 38x15 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
12.02 kg / 26.51 pounds
12024.0 g / 118.0 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
8.02 kg / 17.67 pounds
8016.0 g / 78.6 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
4.01 kg / 8.84 pounds
4008.0 g / 39.3 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
20.04 kg / 44.18 pounds
20040.0 g / 196.6 N
|
Table 4: Material efficiency (saturation) - power losses
MW 38x15 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
2.00 kg / 4.42 pounds
2004.0 g / 19.7 N
|
| 1 mm |
|
5.01 kg / 11.05 pounds
5010.0 g / 49.1 N
|
| 2 mm |
|
10.02 kg / 22.09 pounds
10020.0 g / 98.3 N
|
| 3 mm |
|
15.03 kg / 33.14 pounds
15030.0 g / 147.4 N
|
| 5 mm |
|
25.05 kg / 55.23 pounds
25050.0 g / 245.7 N
|
| 10 mm |
|
40.08 kg / 88.36 pounds
40080.0 g / 393.2 N
|
| 11 mm |
|
40.08 kg / 88.36 pounds
40080.0 g / 393.2 N
|
| 12 mm |
|
40.08 kg / 88.36 pounds
40080.0 g / 393.2 N
|
Table 5: Thermal resistance (material behavior) - thermal limit
MW 38x15 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
40.08 kg / 88.36 pounds
40080.0 g / 393.2 N
|
OK |
| 40 °C | -2.2% |
39.20 kg / 86.42 pounds
39198.2 g / 384.5 N
|
OK |
| 60 °C | -4.4% |
38.32 kg / 84.47 pounds
38316.5 g / 375.9 N
|
|
| 80 °C | -6.6% |
37.43 kg / 82.53 pounds
37434.7 g / 367.2 N
|
|
| 100 °C | -28.8% |
28.54 kg / 62.91 pounds
28537.0 g / 279.9 N
|
Table 6: Two magnets (attraction) - field range
MW 38x15 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
103.10 kg / 227.31 pounds
5 235 Gs
|
15.47 kg / 34.10 pounds
15466 g / 151.7 N
|
N/A |
| 1 mm |
98.64 kg / 217.47 pounds
7 512 Gs
|
14.80 kg / 32.62 pounds
14796 g / 145.2 N
|
88.78 kg / 195.72 pounds
~0 Gs
|
| 2 mm |
94.06 kg / 207.36 pounds
7 336 Gs
|
14.11 kg / 31.10 pounds
14109 g / 138.4 N
|
84.65 kg / 186.63 pounds
~0 Gs
|
| 3 mm |
89.48 kg / 197.26 pounds
7 155 Gs
|
13.42 kg / 29.59 pounds
13421 g / 131.7 N
|
80.53 kg / 177.53 pounds
~0 Gs
|
| 5 mm |
80.42 kg / 177.30 pounds
6 783 Gs
|
12.06 kg / 26.60 pounds
12064 g / 118.3 N
|
72.38 kg / 159.57 pounds
~0 Gs
|
| 10 mm |
59.50 kg / 131.17 pounds
5 834 Gs
|
8.92 kg / 19.68 pounds
8925 g / 87.6 N
|
53.55 kg / 118.05 pounds
~0 Gs
|
| 20 mm |
29.34 kg / 64.69 pounds
4 097 Gs
|
4.40 kg / 9.70 pounds
4401 g / 43.2 N
|
26.41 kg / 58.22 pounds
~0 Gs
|
| 50 mm |
3.08 kg / 6.80 pounds
1 328 Gs
|
0.46 kg / 1.02 pounds
463 g / 4.5 N
|
2.78 kg / 6.12 pounds
~0 Gs
|
| 60 mm |
1.57 kg / 3.46 pounds
948 Gs
|
0.24 kg / 0.52 pounds
236 g / 2.3 N
|
1.41 kg / 3.12 pounds
~0 Gs
|
| 70 mm |
0.84 kg / 1.85 pounds
694 Gs
|
0.13 kg / 0.28 pounds
126 g / 1.2 N
|
0.76 kg / 1.67 pounds
~0 Gs
|
| 80 mm |
0.47 kg / 1.04 pounds
520 Gs
|
0.07 kg / 0.16 pounds
71 g / 0.7 N
|
0.42 kg / 0.94 pounds
~0 Gs
|
| 90 mm |
0.28 kg / 0.61 pounds
398 Gs
|
0.04 kg / 0.09 pounds
42 g / 0.4 N
|
0.25 kg / 0.55 pounds
~0 Gs
|
| 100 mm |
0.17 kg / 0.37 pounds
311 Gs
|
0.03 kg / 0.06 pounds
25 g / 0.2 N
|
0.15 kg / 0.33 pounds
~0 Gs
|
Table 7: Safety (HSE) (implants) - warnings
MW 38x15 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 18.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 14.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 11.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 9.0 cm |
| Car key | 50 Gs (5.0 mT) | 8.0 cm |
| Payment card | 400 Gs (40.0 mT) | 3.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 3.0 cm |
Table 8: Dynamics (cracking risk) - warning
MW 38x15 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
20.81 km/h
(5.78 m/s)
|
2.13 J | |
| 30 mm |
31.25 km/h
(8.68 m/s)
|
4.81 J | |
| 50 mm |
40.01 km/h
(11.11 m/s)
|
7.88 J | |
| 100 mm |
56.53 km/h
(15.70 m/s)
|
15.73 J |
Table 9: Anti-corrosion coating durability
MW 38x15 / 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 38x15 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 45 065 Mx | 450.7 µWb |
| Pc Coefficient | 0.50 | Low (Flat) |
Table 11: Submerged application
MW 38x15 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 40.08 kg | Standard |
| Water (riverbed) |
45.89 kg
(+5.81 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Caution: On a vertical wall, the magnet holds only ~20% of its max power.
2. Steel saturation
*Thin metal sheet (e.g. 0.5mm PC case) drastically limits the holding force.
3. Heat tolerance
*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) = 0.50
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.
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 |
Other products
Advantages as well as disadvantages of Nd2Fe14B magnets.
Advantages
- They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
- Magnets very well defend themselves against loss of magnetization caused by external fields,
- In other words, due to the metallic layer of nickel, the element is aesthetically pleasing,
- Neodymium magnets create maximum magnetic induction on a their surface, which allows for strong attraction,
- Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
- Thanks to versatility in forming and the ability to customize to unusual requirements,
- Huge importance in high-tech industry – they are utilized in magnetic memories, electric motors, medical devices, and multitasking production systems.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Cons
- Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a strong case, which not only secures them against impacts but also increases their durability
- Neodymium magnets decrease their force 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
- Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
- Due to limitations in producing nuts and complex forms in magnets, we recommend using a housing - magnetic mount.
- Possible danger resulting from small fragments of magnets can be dangerous, if swallowed, which becomes key in the aspect of protecting the youngest. Furthermore, small elements of these magnets can complicate diagnosis 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
Lifting parameters
Highest magnetic holding force – what affects it?
- on a block made of mild steel, optimally conducting the magnetic flux
- whose transverse dimension equals approx. 10 mm
- with a plane cleaned and smooth
- without the slightest insulating layer between the magnet and steel
- for force acting at a right angle (in the magnet axis)
- at temperature room level
Magnet lifting force in use – key factors
- Space between surfaces – every millimeter of separation (caused e.g. by varnish or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
- Angle of force application – highest force is available only during perpendicular pulling. The resistance to sliding of the magnet along the surface is standardly many times lower (approx. 1/5 of the lifting capacity).
- Base massiveness – too thin steel does not close the flux, causing part of the flux to be escaped to the other side.
- Steel grade – ideal substrate is high-permeability steel. Cast iron may have worse magnetic properties.
- Surface quality – the more even the plate, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
- Thermal conditions – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and in frost they can be stronger (up to a certain limit).
Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas under parallel forces the load capacity is reduced by as much as 5 times. Additionally, even a small distance between the magnet and the plate reduces the holding force.
H&S for magnets
Fire warning
Dust generated during machining of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.
Eye protection
Watch out for shards. Magnets can fracture upon violent connection, launching sharp fragments into the air. We recommend safety glasses.
Danger to the youngest
Always keep magnets out of reach of children. Risk of swallowing is high, and the consequences of magnets clamping inside the body are tragic.
Heat sensitivity
Avoid heat. NdFeB magnets are susceptible to heat. If you require operation above 80°C, ask us about special high-temperature series (H, SH, UH).
Danger to pacemakers
Warning for patients: Strong magnetic fields disrupt medical devices. Keep minimum 30 cm distance or request help to work with the magnets.
Bone fractures
Risk of injury: The attraction force is so great that it can result in hematomas, crushing, and broken bones. Use thick gloves.
Electronic hazard
Do not bring magnets close to a purse, computer, or screen. The magnetic field can permanently damage these devices and wipe information from cards.
Do not underestimate power
Before starting, check safety instructions. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.
Sensitization to coating
Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If redness happens, immediately stop handling magnets and use protective gear.
Precision electronics
Navigation devices and smartphones are highly sensitive to magnetic fields. Direct contact with a strong magnet can permanently damage the sensors in your phone.
