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
bulk discounts:
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Product card - 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 simulation of the magnet - report
The following data constitute the outcome of a mathematical calculation. Results were calculated on algorithms for the material Nd2Fe14B. Operational parameters may deviate from the simulation results. Treat these calculations 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
|
critical level |
| 1 mm |
3668 Gs
366.8 mT
|
36.56 kg / 80.61 pounds
36563.4 g / 358.7 N
|
critical level |
| 2 mm |
3485 Gs
348.5 mT
|
33.01 kg / 72.78 pounds
33011.6 g / 323.8 N
|
critical level |
| 3 mm |
3297 Gs
329.7 mT
|
29.55 kg / 65.14 pounds
29545.5 g / 289.8 N
|
critical level |
| 5 mm |
2917 Gs
291.7 mT
|
23.13 kg / 50.99 pounds
23128.9 g / 226.9 N
|
critical level |
| 10 mm |
2049 Gs
204.9 mT
|
11.41 kg / 25.15 pounds
11406.3 g / 111.9 N
|
critical level |
| 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
|
low risk |
| 50 mm |
155 Gs
15.5 mT
|
0.07 kg / 0.14 pounds
65.6 g / 0.6 N
|
low risk |
Table 2: Shear capacity (vertical surface)
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: Vertical assembly (sliding) - 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: 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 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: Working in heat (stability) - resistance threshold
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: Magnet-Magnet interaction (repulsion) - field range
MW 38x15 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding 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: Hazards (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 |
| Mechanical watch | 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) - collision effects
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: Corrosion resistance
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: Underwater work (magnet fishing)
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. Vertical hold
*Caution: On a vertical wall, the magnet holds merely ~20% of its nominal pull.
2. Efficiency vs thickness
*Thin steel (e.g. computer case) significantly limits 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
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other offers
Advantages and disadvantages of Nd2Fe14B magnets.
Pros
- They do not lose magnetism, even over nearly 10 years – the decrease in strength is only ~1% (based on measurements),
- They do not lose their magnetic properties even under close interference source,
- A magnet with a smooth gold surface has better aesthetics,
- Magnetic induction on the working layer of the magnet remains very high,
- Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures reaching 230°C and above...
- Thanks to modularity in constructing and the ability to adapt to unusual requirements,
- Key role in future technologies – they are commonly used in magnetic memories, electromotive mechanisms, diagnostic systems, as well as modern systems.
- Thanks to their power density, small magnets offer high operating force, with minimal size,
Cons
- At strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
- We warn that neodymium magnets can reduce their strength 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 suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
- Due to limitations in creating threads and complicated shapes in magnets, we recommend using cover - magnetic mechanism.
- Potential hazard resulting from small fragments of magnets can be dangerous, in case of ingestion, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these magnets are able to complicate diagnosis medical after entering the body.
- With large orders the cost of neodymium magnets is a challenge,
Holding force characteristics
Optimal lifting capacity of a neodymium magnet – what it depends on?
- on a base made of structural steel, perfectly concentrating the magnetic flux
- with a thickness of at least 10 mm
- with an polished touching surface
- with total lack of distance (no impurities)
- during pulling in a direction vertical to the plane
- at standard ambient temperature
Practical aspects of lifting capacity – factors
- Space between magnet and steel – every millimeter of distance (caused e.g. by varnish or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
- Force direction – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet holds much less (typically approx. 20-30% of nominal force).
- Element thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
- Material composition – not every steel reacts the same. High carbon content worsen the interaction with the magnet.
- Surface quality – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Roughness creates an air distance.
- Heat – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).
Lifting capacity testing was conducted on a smooth plate of optimal thickness, under a perpendicular pulling force, however under parallel forces the holding force is lower. Additionally, even a slight gap between the magnet and the plate decreases the lifting capacity.
Warnings
Allergic reactions
Some people experience a hypersensitivity to Ni, which is the common plating for neodymium magnets. Extended handling may cause an allergic reaction. We recommend use protective gloves.
Warning for heart patients
For implant holders: Strong magnetic fields affect electronics. Keep at least 30 cm distance or ask another person to handle the magnets.
Pinching danger
Big blocks can smash fingers instantly. Do not place your hand between two attracting surfaces.
Handling rules
Before starting, check safety instructions. Sudden snapping can break the magnet or hurt your hand. Be predictive.
Magnet fragility
NdFeB magnets are sintered ceramics, which means they are prone to chipping. Collision of two magnets leads to them shattering into shards.
Flammability
Mechanical processing of neodymium magnets poses a fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.
Do not give to children
Strictly store magnets out of reach of children. Ingestion danger is significant, and the effects of magnets clamping inside the body are tragic.
Do not overheat magnets
Do not overheat. NdFeB magnets are sensitive to temperature. If you need resistance above 80°C, inquire about special high-temperature series (H, SH, UH).
Protect data
Data protection: Neodymium magnets can damage data carriers and sensitive devices (heart implants, medical aids, timepieces).
Keep away from electronics
A strong magnetic field interferes with the operation of magnetometers in phones and navigation systems. Maintain magnets near a device to prevent breaking the sensors.
