MW 38x12 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010060
GTIN/EAN: 5906301810599
Diameter Ø
38 mm [±0,1 mm]
Height
12 mm [±0,1 mm]
Weight
102.07 g
Magnetization Direction
↑ axial
Load capacity
32.79 kg / 321.71 N
Magnetic Induction
331.00 mT / 3310 Gs
Coating
[NiCuNi] Nickel
32.10 ZŁ with VAT / pcs + price for transport
26.10 ZŁ net + 23% VAT / pcs
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Technical data of the product - MW 38x12 / N38 - cylindrical magnet
Specification / characteristics - MW 38x12 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010060 |
| GTIN/EAN | 5906301810599 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 38 mm [±0,1 mm] |
| Height | 12 mm [±0,1 mm] |
| Weight | 102.07 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 32.79 kg / 321.71 N |
| Magnetic Induction ~ ? | 331.00 mT / 3310 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 |
Engineering simulation of the magnet - technical parameters
These information represent the outcome of a engineering analysis. Results are based on models for the class Nd2Fe14B. Operational conditions might slightly differ from theoretical values. Please consider these data as a supplementary guide when designing systems.
Table 1: Static pull force (pull vs distance) - characteristics
MW 38x12 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3309 Gs
330.9 mT
|
32.79 kg / 72.29 pounds
32790.0 g / 321.7 N
|
dangerous! |
| 1 mm |
3175 Gs
317.5 mT
|
30.18 kg / 66.54 pounds
30182.9 g / 296.1 N
|
dangerous! |
| 2 mm |
3029 Gs
302.9 mT
|
27.46 kg / 60.55 pounds
27464.0 g / 269.4 N
|
dangerous! |
| 3 mm |
2875 Gs
287.5 mT
|
24.74 kg / 54.55 pounds
24742.8 g / 242.7 N
|
dangerous! |
| 5 mm |
2556 Gs
255.6 mT
|
19.56 kg / 43.13 pounds
19563.2 g / 191.9 N
|
dangerous! |
| 10 mm |
1805 Gs
180.5 mT
|
9.75 kg / 21.50 pounds
9750.4 g / 95.7 N
|
strong |
| 15 mm |
1229 Gs
122.9 mT
|
4.52 kg / 9.96 pounds
4519.1 g / 44.3 N
|
strong |
| 20 mm |
836 Gs
83.6 mT
|
2.09 kg / 4.61 pounds
2092.9 g / 20.5 N
|
strong |
| 30 mm |
411 Gs
41.1 mT
|
0.51 kg / 1.11 pounds
505.7 g / 5.0 N
|
safe |
| 50 mm |
132 Gs
13.2 mT
|
0.05 kg / 0.12 pounds
52.4 g / 0.5 N
|
safe |
Table 2: Shear capacity (wall)
MW 38x12 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
6.56 kg / 14.46 pounds
6558.0 g / 64.3 N
|
| 1 mm | Stal (~0.2) |
6.04 kg / 13.31 pounds
6036.0 g / 59.2 N
|
| 2 mm | Stal (~0.2) |
5.49 kg / 12.11 pounds
5492.0 g / 53.9 N
|
| 3 mm | Stal (~0.2) |
4.95 kg / 10.91 pounds
4948.0 g / 48.5 N
|
| 5 mm | Stal (~0.2) |
3.91 kg / 8.62 pounds
3912.0 g / 38.4 N
|
| 10 mm | Stal (~0.2) |
1.95 kg / 4.30 pounds
1950.0 g / 19.1 N
|
| 15 mm | Stal (~0.2) |
0.90 kg / 1.99 pounds
904.0 g / 8.9 N
|
| 20 mm | Stal (~0.2) |
0.42 kg / 0.92 pounds
418.0 g / 4.1 N
|
| 30 mm | Stal (~0.2) |
0.10 kg / 0.22 pounds
102.0 g / 1.0 N
|
| 50 mm | Stal (~0.2) |
0.01 kg / 0.02 pounds
10.0 g / 0.1 N
|
Table 3: Vertical assembly (sliding) - vertical pull
MW 38x12 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
9.84 kg / 21.69 pounds
9837.0 g / 96.5 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
6.56 kg / 14.46 pounds
6558.0 g / 64.3 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
3.28 kg / 7.23 pounds
3279.0 g / 32.2 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
16.40 kg / 36.14 pounds
16395.0 g / 160.8 N
|
Table 4: Steel thickness (saturation) - power losses
MW 38x12 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
1.64 kg / 3.61 pounds
1639.5 g / 16.1 N
|
| 1 mm |
|
4.10 kg / 9.04 pounds
4098.8 g / 40.2 N
|
| 2 mm |
|
8.20 kg / 18.07 pounds
8197.5 g / 80.4 N
|
| 3 mm |
|
12.30 kg / 27.11 pounds
12296.3 g / 120.6 N
|
| 5 mm |
|
20.49 kg / 45.18 pounds
20493.8 g / 201.0 N
|
| 10 mm |
|
32.79 kg / 72.29 pounds
32790.0 g / 321.7 N
|
| 11 mm |
|
32.79 kg / 72.29 pounds
32790.0 g / 321.7 N
|
| 12 mm |
|
32.79 kg / 72.29 pounds
32790.0 g / 321.7 N
|
Table 5: Working in heat (material behavior) - resistance threshold
MW 38x12 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
32.79 kg / 72.29 pounds
32790.0 g / 321.7 N
|
OK |
| 40 °C | -2.2% |
32.07 kg / 70.70 pounds
32068.6 g / 314.6 N
|
OK |
| 60 °C | -4.4% |
31.35 kg / 69.11 pounds
31347.2 g / 307.5 N
|
|
| 80 °C | -6.6% |
30.63 kg / 67.52 pounds
30625.9 g / 300.4 N
|
|
| 100 °C | -28.8% |
23.35 kg / 51.47 pounds
23346.5 g / 229.0 N
|
Table 6: Magnet-Magnet interaction (attraction) - field range
MW 38x12 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
76.58 kg / 168.83 pounds
4 859 Gs
|
11.49 kg / 25.32 pounds
11487 g / 112.7 N
|
N/A |
| 1 mm |
73.60 kg / 162.27 pounds
6 489 Gs
|
11.04 kg / 24.34 pounds
11040 g / 108.3 N
|
66.24 kg / 146.04 pounds
~0 Gs
|
| 2 mm |
70.49 kg / 155.40 pounds
6 350 Gs
|
10.57 kg / 23.31 pounds
10573 g / 103.7 N
|
63.44 kg / 139.86 pounds
~0 Gs
|
| 3 mm |
67.33 kg / 148.43 pounds
6 206 Gs
|
10.10 kg / 22.26 pounds
10099 g / 99.1 N
|
60.59 kg / 133.59 pounds
~0 Gs
|
| 5 mm |
60.95 kg / 134.38 pounds
5 905 Gs
|
9.14 kg / 20.16 pounds
9143 g / 89.7 N
|
54.86 kg / 120.94 pounds
~0 Gs
|
| 10 mm |
45.69 kg / 100.73 pounds
5 113 Gs
|
6.85 kg / 15.11 pounds
6853 g / 67.2 N
|
41.12 kg / 90.65 pounds
~0 Gs
|
| 20 mm |
22.77 kg / 50.20 pounds
3 609 Gs
|
3.42 kg / 7.53 pounds
3416 g / 33.5 N
|
20.49 kg / 45.18 pounds
~0 Gs
|
| 50 mm |
2.34 kg / 5.17 pounds
1 158 Gs
|
0.35 kg / 0.78 pounds
352 g / 3.5 N
|
2.11 kg / 4.65 pounds
~0 Gs
|
| 60 mm |
1.18 kg / 2.60 pounds
822 Gs
|
0.18 kg / 0.39 pounds
177 g / 1.7 N
|
1.06 kg / 2.34 pounds
~0 Gs
|
| 70 mm |
0.63 kg / 1.38 pounds
598 Gs
|
0.09 kg / 0.21 pounds
94 g / 0.9 N
|
0.56 kg / 1.24 pounds
~0 Gs
|
| 80 mm |
0.35 kg / 0.77 pounds
446 Gs
|
0.05 kg / 0.12 pounds
52 g / 0.5 N
|
0.31 kg / 0.69 pounds
~0 Gs
|
| 90 mm |
0.20 kg / 0.45 pounds
340 Gs
|
0.03 kg / 0.07 pounds
30 g / 0.3 N
|
0.18 kg / 0.40 pounds
~0 Gs
|
| 100 mm |
0.12 kg / 0.27 pounds
264 Gs
|
0.02 kg / 0.04 pounds
18 g / 0.2 N
|
0.11 kg / 0.24 pounds
~0 Gs
|
Table 7: Hazards (implants) - warnings
MW 38x12 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 17.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 13.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 10.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 8.0 cm |
| Car key | 50 Gs (5.0 mT) | 7.5 cm |
| Payment card | 400 Gs (40.0 mT) | 3.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 2.5 cm |
Table 8: Impact energy (kinetic energy) - warning
MW 38x12 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
21.17 km/h
(5.88 m/s)
|
1.76 J | |
| 30 mm |
31.61 km/h
(8.78 m/s)
|
3.93 J | |
| 50 mm |
40.46 km/h
(11.24 m/s)
|
6.45 J | |
| 100 mm |
57.16 km/h
(15.88 m/s)
|
12.87 J |
Table 9: Anti-corrosion coating durability
MW 38x12 / 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 38x12 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 40 045 Mx | 400.5 µWb |
| Pc Coefficient | 0.42 | Low (Flat) |
Table 11: Submerged application
MW 38x12 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 32.79 kg | Standard |
| Water (riverbed) |
37.54 kg
(+4.75 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Caution: On a vertical surface, the magnet holds only approx. 20-30% of its max power.
2. Plate thickness effect
*Thin metal sheet (e.g. computer case) drastically limits the holding force.
3. Power loss vs temp
*For standard magnets, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.42
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.
Material specification
| 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 rare earth magnets.
Advantages
- They have unchanged lifting capacity, and over around 10 years their performance decreases symbolically – ~1% (in testing),
- They have excellent resistance to magnetic field loss due to external magnetic sources,
- Thanks to the reflective finish, the coating of Ni-Cu-Ni, gold-plated, or silver-plated gives an visually attractive appearance,
- Magnetic induction on the top side of the magnet turns out to be extremely intense,
- Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling action at temperatures approaching 230°C and above...
- In view of the potential of precise forming and adaptation to specialized requirements, neodymium magnets can be created in a broad palette of shapes and sizes, which amplifies use scope,
- Significant place in advanced technology sectors – they are used in hard drives, electric drive systems, diagnostic systems, and multitasking production systems.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which allows their use in miniature devices
Limitations
- They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only protects the magnet but also improves its resistance to damage
- We warn that neodymium magnets can lose their power 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 corrode. Therefore while using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
- Limited ability of producing threads in the magnet and complicated forms - recommended is casing - magnet mounting.
- Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child health protection. Furthermore, small components of these devices can be problematic in diagnostics medical after entering the body.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities
Pull force analysis
Maximum holding power of the magnet – what affects it?
- using a base made of low-carbon steel, functioning as a ideal flux conductor
- possessing a thickness of at least 10 mm to avoid saturation
- with a surface perfectly flat
- under conditions of no distance (metal-to-metal)
- during pulling in a direction perpendicular to the plane
- at standard ambient temperature
Practical lifting capacity: influencing factors
- Clearance – existence of foreign body (rust, dirt, air) acts as an insulator, which reduces power steeply (even by 50% at 0.5 mm).
- Direction of force – highest force is available only during perpendicular pulling. The force required to slide of the magnet along the plate is standardly several times lower (approx. 1/5 of the lifting capacity).
- Element thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
- Steel grade – ideal substrate is high-permeability steel. Stainless steels may have worse magnetic properties.
- Surface finish – ideal contact is obtained only on polished steel. Rough texture create air cushions, reducing force.
- Heat – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).
Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, whereas under shearing force the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate lowers the lifting capacity.
Safe handling of NdFeB magnets
Bone fractures
Pinching hazard: The pulling power is so immense that it can cause blood blisters, pinching, and broken bones. Use thick gloves.
Handling rules
Before starting, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.
Swallowing risk
Product intended for adults. Tiny parts can be swallowed, causing severe trauma. Keep out of reach of children and animals.
Compass and GPS
A powerful magnetic field negatively affects the operation of compasses in phones and GPS navigation. Maintain magnets near a device to avoid damaging the sensors.
Operating temperature
Standard neodymium magnets (grade N) lose magnetization when the temperature goes above 80°C. The loss of strength is permanent.
Allergy Warning
Some people experience a sensitization to nickel, which is the typical protective layer for neodymium magnets. Extended handling may cause dermatitis. It is best to wear protective gloves.
Combustion hazard
Fire warning: Rare earth powder is explosive. Do not process magnets without safety gear as this risks ignition.
Protect data
Powerful magnetic fields can erase data on payment cards, HDDs, and other magnetic media. Stay away of min. 10 cm.
Danger to pacemakers
Medical warning: Neodymium magnets can deactivate pacemakers and defibrillators. Stay away if you have medical devices.
Fragile material
Beware of splinters. Magnets can fracture upon violent connection, launching shards into the air. Wear goggles.
