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 - 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 |
Technical analysis of the assembly - technical parameters
These data constitute the direct effect of a engineering simulation. Values were calculated on models for the class Nd2Fe14B. Operational conditions might slightly differ. Use these data as a preliminary roadmap during assembly planning.
Table 1: Static pull force (pull vs gap) - characteristics
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 LBS
40080.0 g / 393.2 N
|
crushing |
| 1 mm |
3668 Gs
366.8 mT
|
36.56 kg / 80.61 LBS
36563.4 g / 358.7 N
|
crushing |
| 2 mm |
3485 Gs
348.5 mT
|
33.01 kg / 72.78 LBS
33011.6 g / 323.8 N
|
crushing |
| 3 mm |
3297 Gs
329.7 mT
|
29.55 kg / 65.14 LBS
29545.5 g / 289.8 N
|
crushing |
| 5 mm |
2917 Gs
291.7 mT
|
23.13 kg / 50.99 LBS
23128.9 g / 226.9 N
|
crushing |
| 10 mm |
2049 Gs
204.9 mT
|
11.41 kg / 25.15 LBS
11406.3 g / 111.9 N
|
crushing |
| 15 mm |
1396 Gs
139.6 mT
|
5.30 kg / 11.68 LBS
5297.4 g / 52.0 N
|
warning |
| 20 mm |
954 Gs
95.4 mT
|
2.47 kg / 5.45 LBS
2473.1 g / 24.3 N
|
warning |
| 30 mm |
474 Gs
47.4 mT
|
0.61 kg / 1.35 LBS
610.3 g / 6.0 N
|
low risk |
| 50 mm |
155 Gs
15.5 mT
|
0.07 kg / 0.14 LBS
65.6 g / 0.6 N
|
low risk |
Table 2: Sliding 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 LBS
8016.0 g / 78.6 N
|
| 1 mm | Stal (~0.2) |
7.31 kg / 16.12 LBS
7312.0 g / 71.7 N
|
| 2 mm | Stal (~0.2) |
6.60 kg / 14.55 LBS
6602.0 g / 64.8 N
|
| 3 mm | Stal (~0.2) |
5.91 kg / 13.03 LBS
5910.0 g / 58.0 N
|
| 5 mm | Stal (~0.2) |
4.63 kg / 10.20 LBS
4626.0 g / 45.4 N
|
| 10 mm | Stal (~0.2) |
2.28 kg / 5.03 LBS
2282.0 g / 22.4 N
|
| 15 mm | Stal (~0.2) |
1.06 kg / 2.34 LBS
1060.0 g / 10.4 N
|
| 20 mm | Stal (~0.2) |
0.49 kg / 1.09 LBS
494.0 g / 4.8 N
|
| 30 mm | Stal (~0.2) |
0.12 kg / 0.27 LBS
122.0 g / 1.2 N
|
| 50 mm | Stal (~0.2) |
0.01 kg / 0.03 LBS
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 LBS
12024.0 g / 118.0 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
8.02 kg / 17.67 LBS
8016.0 g / 78.6 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
4.01 kg / 8.84 LBS
4008.0 g / 39.3 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
20.04 kg / 44.18 LBS
20040.0 g / 196.6 N
|
Table 4: Steel thickness (saturation) - sheet metal selection
MW 38x15 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
2.00 kg / 4.42 LBS
2004.0 g / 19.7 N
|
| 1 mm |
|
5.01 kg / 11.05 LBS
5010.0 g / 49.1 N
|
| 2 mm |
|
10.02 kg / 22.09 LBS
10020.0 g / 98.3 N
|
| 3 mm |
|
15.03 kg / 33.14 LBS
15030.0 g / 147.4 N
|
| 5 mm |
|
25.05 kg / 55.23 LBS
25050.0 g / 245.7 N
|
| 10 mm |
|
40.08 kg / 88.36 LBS
40080.0 g / 393.2 N
|
| 11 mm |
|
40.08 kg / 88.36 LBS
40080.0 g / 393.2 N
|
| 12 mm |
|
40.08 kg / 88.36 LBS
40080.0 g / 393.2 N
|
Table 5: Thermal resistance (stability) - power drop
MW 38x15 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
40.08 kg / 88.36 LBS
40080.0 g / 393.2 N
|
OK |
| 40 °C | -2.2% |
39.20 kg / 86.42 LBS
39198.2 g / 384.5 N
|
OK |
| 60 °C | -4.4% |
38.32 kg / 84.47 LBS
38316.5 g / 375.9 N
|
|
| 80 °C | -6.6% |
37.43 kg / 82.53 LBS
37434.7 g / 367.2 N
|
|
| 100 °C | -28.8% |
28.54 kg / 62.91 LBS
28537.0 g / 279.9 N
|
Table 6: Two magnets (repulsion) - 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 LBS
5 235 Gs
|
15.47 kg / 34.10 LBS
15466 g / 151.7 N
|
N/A |
| 1 mm |
98.64 kg / 217.47 LBS
7 512 Gs
|
14.80 kg / 32.62 LBS
14796 g / 145.2 N
|
88.78 kg / 195.72 LBS
~0 Gs
|
| 2 mm |
94.06 kg / 207.36 LBS
7 336 Gs
|
14.11 kg / 31.10 LBS
14109 g / 138.4 N
|
84.65 kg / 186.63 LBS
~0 Gs
|
| 3 mm |
89.48 kg / 197.26 LBS
7 155 Gs
|
13.42 kg / 29.59 LBS
13421 g / 131.7 N
|
80.53 kg / 177.53 LBS
~0 Gs
|
| 5 mm |
80.42 kg / 177.30 LBS
6 783 Gs
|
12.06 kg / 26.60 LBS
12064 g / 118.3 N
|
72.38 kg / 159.57 LBS
~0 Gs
|
| 10 mm |
59.50 kg / 131.17 LBS
5 834 Gs
|
8.92 kg / 19.68 LBS
8925 g / 87.6 N
|
53.55 kg / 118.05 LBS
~0 Gs
|
| 20 mm |
29.34 kg / 64.69 LBS
4 097 Gs
|
4.40 kg / 9.70 LBS
4401 g / 43.2 N
|
26.41 kg / 58.22 LBS
~0 Gs
|
| 50 mm |
3.08 kg / 6.80 LBS
1 328 Gs
|
0.46 kg / 1.02 LBS
463 g / 4.5 N
|
2.78 kg / 6.12 LBS
~0 Gs
|
| 60 mm |
1.57 kg / 3.46 LBS
948 Gs
|
0.24 kg / 0.52 LBS
236 g / 2.3 N
|
1.41 kg / 3.12 LBS
~0 Gs
|
| 70 mm |
0.84 kg / 1.85 LBS
694 Gs
|
0.13 kg / 0.28 LBS
126 g / 1.2 N
|
0.76 kg / 1.67 LBS
~0 Gs
|
| 80 mm |
0.47 kg / 1.04 LBS
520 Gs
|
0.07 kg / 0.16 LBS
71 g / 0.7 N
|
0.42 kg / 0.94 LBS
~0 Gs
|
| 90 mm |
0.28 kg / 0.61 LBS
398 Gs
|
0.04 kg / 0.09 LBS
42 g / 0.4 N
|
0.25 kg / 0.55 LBS
~0 Gs
|
| 100 mm |
0.17 kg / 0.37 LBS
311 Gs
|
0.03 kg / 0.06 LBS
25 g / 0.2 N
|
0.15 kg / 0.33 LBS
~0 Gs
|
Table 7: Hazards (electronics) - 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 |
| Phone / Smartphone | 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: Impact energy (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 (Flux)
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. Wall mount (shear)
*Warning: On a vertical wall, the magnet retains just ~20% of its perpendicular strength.
2. Steel saturation
*Thin steel (e.g. computer case) drastically reduces the holding force.
3. Power loss vs temp
*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) = 0.50
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.
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
View also offers
Pros and cons of rare earth magnets.
Strengths
- They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (according to literature),
- They do not lose their magnetic properties even under external field action,
- By using a shiny coating of nickel, the element presents an professional look,
- Magnets exhibit exceptionally strong magnetic induction on the active area,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Thanks to flexibility in designing and the capacity to customize to individual projects,
- Versatile presence in modern industrial fields – they serve a role in data components, electric motors, advanced medical instruments, and other advanced devices.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Limitations
- At very strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise 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 protecting against moisture
- We suggest a housing - magnetic mount, due to difficulties in realizing threads inside the magnet and complex shapes.
- Possible danger related to microscopic parts of magnets can be dangerous, in case of ingestion, which becomes key in the context of child health protection. Additionally, tiny parts of these devices are able to be problematic in diagnostics medical when they are in the body.
- Due to expensive raw materials, their price exceeds standard values,
Pull force analysis
Breakaway strength of the magnet in ideal conditions – what affects it?
- using a base made of mild steel, serving as a ideal flux conductor
- with a cross-section of at least 10 mm
- characterized by lack of roughness
- without the slightest clearance between the magnet and steel
- for force applied at a right angle (in the magnet axis)
- at temperature room level
Practical aspects of lifting capacity – factors
- Distance – existence of any layer (rust, dirt, air) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
- Load vector – highest force is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the plate is typically several times smaller (approx. 1/5 of the lifting capacity).
- Element thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
- Steel grade – the best choice is pure iron steel. Stainless steels may have worse magnetic properties.
- Surface structure – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
- Temperature – heating the magnet causes a temporary drop of force. Check the maximum operating temperature for a given model.
Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the holding force is lower. Additionally, even a small distance between the magnet and the plate decreases the holding force.
Safety rules for work with neodymium magnets
Threat to navigation
GPS units and smartphones are extremely susceptible to magnetism. Close proximity with a powerful NdFeB magnet can ruin the sensors in your phone.
Skin irritation risks
A percentage of the population have a hypersensitivity to Ni, which is the common plating for neodymium magnets. Prolonged contact might lead to dermatitis. We recommend wear protective gloves.
Respect the power
Handle magnets consciously. Their immense force can surprise even experienced users. Plan your moves and do not underestimate their power.
Electronic devices
Equipment safety: Neodymium magnets can ruin payment cards and delicate electronics (heart implants, hearing aids, timepieces).
Physical harm
Risk of injury: The pulling power is so immense that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.
Protective goggles
Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Do not hit, as the magnet may crumble into hazardous fragments.
Maximum temperature
Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will ruin its properties and strength.
Pacemakers
Life threat: Neodymium magnets can turn off pacemakers and defibrillators. Stay away if you have electronic implants.
Machining danger
Dust created during cutting of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.
No play value
These products are not toys. Accidental ingestion of multiple magnets can lead to them attracting across intestines, which constitutes a direct threat to life and requires urgent medical intervention.
