MW 33x10 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010057
GTIN/EAN: 5906301810568
Diameter Ø
33 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
64.15 g
Magnetization Direction
↑ axial
Load capacity
23.67 kg / 232.15 N
Magnetic Induction
321.26 mT / 3213 Gs
Coating
[NiCuNi] Nickel
26.52 ZŁ with VAT / pcs + price for transport
21.56 ZŁ net + 23% VAT / pcs
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Physical properties - MW 33x10 / N38 - cylindrical magnet
Specification / characteristics - MW 33x10 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010057 |
| GTIN/EAN | 5906301810568 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 33 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 64.15 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 23.67 kg / 232.15 N |
| Magnetic Induction ~ ? | 321.26 mT / 3213 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 analysis of the product - data
Presented information constitute the outcome of a physical calculation. Results rely on algorithms for the class Nd2Fe14B. Operational conditions might slightly differ. Please consider these calculations as a reference point when designing systems.
Table 1: Static force (force vs distance) - power drop
MW 33x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3212 Gs
321.2 mT
|
23.67 kg / 52.18 pounds
23670.0 g / 232.2 N
|
dangerous! |
| 1 mm |
3064 Gs
306.4 mT
|
21.54 kg / 47.49 pounds
21539.1 g / 211.3 N
|
dangerous! |
| 2 mm |
2901 Gs
290.1 mT
|
19.30 kg / 42.55 pounds
19302.3 g / 189.4 N
|
dangerous! |
| 3 mm |
2728 Gs
272.8 mT
|
17.07 kg / 37.64 pounds
17072.3 g / 167.5 N
|
dangerous! |
| 5 mm |
2373 Gs
237.3 mT
|
12.91 kg / 28.47 pounds
12913.7 g / 126.7 N
|
dangerous! |
| 10 mm |
1569 Gs
156.9 mT
|
5.65 kg / 12.45 pounds
5648.1 g / 55.4 N
|
medium risk |
| 15 mm |
1004 Gs
100.4 mT
|
2.31 kg / 5.10 pounds
2312.6 g / 22.7 N
|
medium risk |
| 20 mm |
650 Gs
65.0 mT
|
0.97 kg / 2.14 pounds
969.4 g / 9.5 N
|
weak grip |
| 30 mm |
299 Gs
29.9 mT
|
0.21 kg / 0.45 pounds
205.1 g / 2.0 N
|
weak grip |
| 50 mm |
90 Gs
9.0 mT
|
0.02 kg / 0.04 pounds
18.7 g / 0.2 N
|
weak grip |
Table 2: Sliding load (vertical surface)
MW 33x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
4.73 kg / 10.44 pounds
4734.0 g / 46.4 N
|
| 1 mm | Stal (~0.2) |
4.31 kg / 9.50 pounds
4308.0 g / 42.3 N
|
| 2 mm | Stal (~0.2) |
3.86 kg / 8.51 pounds
3860.0 g / 37.9 N
|
| 3 mm | Stal (~0.2) |
3.41 kg / 7.53 pounds
3414.0 g / 33.5 N
|
| 5 mm | Stal (~0.2) |
2.58 kg / 5.69 pounds
2582.0 g / 25.3 N
|
| 10 mm | Stal (~0.2) |
1.13 kg / 2.49 pounds
1130.0 g / 11.1 N
|
| 15 mm | Stal (~0.2) |
0.46 kg / 1.02 pounds
462.0 g / 4.5 N
|
| 20 mm | Stal (~0.2) |
0.19 kg / 0.43 pounds
194.0 g / 1.9 N
|
| 30 mm | Stal (~0.2) |
0.04 kg / 0.09 pounds
42.0 g / 0.4 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.01 pounds
4.0 g / 0.0 N
|
Table 3: Wall mounting (sliding) - vertical pull
MW 33x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
7.10 kg / 15.66 pounds
7101.0 g / 69.7 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
4.73 kg / 10.44 pounds
4734.0 g / 46.4 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
2.37 kg / 5.22 pounds
2367.0 g / 23.2 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
11.84 kg / 26.09 pounds
11835.0 g / 116.1 N
|
Table 4: Steel thickness (saturation) - sheet metal selection
MW 33x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
1.18 kg / 2.61 pounds
1183.5 g / 11.6 N
|
| 1 mm |
|
2.96 kg / 6.52 pounds
2958.8 g / 29.0 N
|
| 2 mm |
|
5.92 kg / 13.05 pounds
5917.5 g / 58.1 N
|
| 3 mm |
|
8.88 kg / 19.57 pounds
8876.3 g / 87.1 N
|
| 5 mm |
|
14.79 kg / 32.61 pounds
14793.8 g / 145.1 N
|
| 10 mm |
|
23.67 kg / 52.18 pounds
23670.0 g / 232.2 N
|
| 11 mm |
|
23.67 kg / 52.18 pounds
23670.0 g / 232.2 N
|
| 12 mm |
|
23.67 kg / 52.18 pounds
23670.0 g / 232.2 N
|
Table 5: Working in heat (stability) - power drop
MW 33x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
23.67 kg / 52.18 pounds
23670.0 g / 232.2 N
|
OK |
| 40 °C | -2.2% |
23.15 kg / 51.04 pounds
23149.3 g / 227.1 N
|
OK |
| 60 °C | -4.4% |
22.63 kg / 49.89 pounds
22628.5 g / 222.0 N
|
|
| 80 °C | -6.6% |
22.11 kg / 48.74 pounds
22107.8 g / 216.9 N
|
|
| 100 °C | -28.8% |
16.85 kg / 37.15 pounds
16853.0 g / 165.3 N
|
Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 33x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
54.40 kg / 119.94 pounds
4 780 Gs
|
8.16 kg / 17.99 pounds
8160 g / 80.1 N
|
N/A |
| 1 mm |
52.02 kg / 114.68 pounds
6 282 Gs
|
7.80 kg / 17.20 pounds
7803 g / 76.5 N
|
46.82 kg / 103.21 pounds
~0 Gs
|
| 2 mm |
49.51 kg / 109.14 pounds
6 128 Gs
|
7.43 kg / 16.37 pounds
7426 g / 72.8 N
|
44.55 kg / 98.23 pounds
~0 Gs
|
| 3 mm |
46.95 kg / 103.50 pounds
5 968 Gs
|
7.04 kg / 15.52 pounds
7042 g / 69.1 N
|
42.25 kg / 93.15 pounds
~0 Gs
|
| 5 mm |
41.79 kg / 92.13 pounds
5 630 Gs
|
6.27 kg / 13.82 pounds
6268 g / 61.5 N
|
37.61 kg / 82.91 pounds
~0 Gs
|
| 10 mm |
29.68 kg / 65.43 pounds
4 745 Gs
|
4.45 kg / 9.82 pounds
4452 g / 43.7 N
|
26.71 kg / 58.89 pounds
~0 Gs
|
| 20 mm |
12.98 kg / 28.62 pounds
3 138 Gs
|
1.95 kg / 4.29 pounds
1947 g / 19.1 N
|
11.68 kg / 25.76 pounds
~0 Gs
|
| 50 mm |
0.99 kg / 2.18 pounds
867 Gs
|
0.15 kg / 0.33 pounds
149 g / 1.5 N
|
0.89 kg / 1.97 pounds
~0 Gs
|
| 60 mm |
0.47 kg / 1.04 pounds
598 Gs
|
0.07 kg / 0.16 pounds
71 g / 0.7 N
|
0.42 kg / 0.94 pounds
~0 Gs
|
| 70 mm |
0.24 kg / 0.53 pounds
426 Gs
|
0.04 kg / 0.08 pounds
36 g / 0.4 N
|
0.22 kg / 0.47 pounds
~0 Gs
|
| 80 mm |
0.13 kg / 0.28 pounds
312 Gs
|
0.02 kg / 0.04 pounds
19 g / 0.2 N
|
0.12 kg / 0.26 pounds
~0 Gs
|
| 90 mm |
0.07 kg / 0.16 pounds
235 Gs
|
0.01 kg / 0.02 pounds
11 g / 0.1 N
|
0.07 kg / 0.14 pounds
~0 Gs
|
| 100 mm |
0.04 kg / 0.09 pounds
181 Gs
|
0.01 kg / 0.01 pounds
6 g / 0.1 N
|
0.04 kg / 0.09 pounds
~0 Gs
|
Table 7: Hazards (electronics) - precautionary measures
MW 33x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 14.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 11.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 9.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 7.0 cm |
| Remote | 50 Gs (5.0 mT) | 6.5 cm |
| Payment card | 400 Gs (40.0 mT) | 3.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 2.5 cm |
Table 8: Collisions (cracking risk) - collision effects
MW 33x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
22.07 km/h
(6.13 m/s)
|
1.21 J | |
| 30 mm |
33.74 km/h
(9.37 m/s)
|
2.82 J | |
| 50 mm |
43.34 km/h
(12.04 m/s)
|
4.65 J | |
| 100 mm |
61.26 km/h
(17.02 m/s)
|
9.29 J |
Table 9: Anti-corrosion coating durability
MW 33x10 / 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 33x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 29 509 Mx | 295.1 µWb |
| Pc Coefficient | 0.40 | Low (Flat) |
Table 11: Physics of underwater searching
MW 33x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 23.67 kg | Standard |
| Water (riverbed) |
27.10 kg
(+3.43 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Caution: On a vertical surface, the magnet holds merely a fraction of its nominal pull.
2. Steel thickness impact
*Thin metal sheet (e.g. 0.5mm PC case) severely limits the holding force.
3. Thermal stability
*For N38 material, the critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.40
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
View also proposals
Pros as well as cons of Nd2Fe14B magnets.
Benefits
- They retain full power for nearly ten years – the loss is just ~1% (according to analyses),
- Magnets very well protect themselves against loss of magnetization caused by foreign field sources,
- Thanks to the shimmering finish, the coating of Ni-Cu-Ni, gold, or silver gives an elegant appearance,
- The surface of neodymium magnets generates a maximum magnetic field – this is a distinguishing feature,
- Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
- Due to the possibility of free forming and adaptation to unique requirements, neodymium magnets can be modeled in a wide range of geometric configurations, which expands the range of possible applications,
- Wide application in advanced technology sectors – they serve a role in mass storage devices, motor assemblies, precision medical tools, also industrial machines.
- Thanks to their power density, small magnets offer high operating force, with minimal size,
Limitations
- Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a strong case, which not only protects them against impacts but also raises their durability
- Neodymium magnets decrease their strength 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
- They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
- Limited ability of creating threads in the magnet and complicated shapes - recommended is casing - magnet mounting.
- Health risk to health – tiny shards of magnets pose a threat, in case of ingestion, which gains importance in the aspect of protecting the youngest. Additionally, small components of these products are able to disrupt the diagnostic process medical when they are in the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Holding force characteristics
Magnetic strength at its maximum – what it depends on?
- with the application of a sheet made of low-carbon steel, ensuring full magnetic saturation
- possessing a massiveness of at least 10 mm to avoid saturation
- with an ground contact surface
- without the slightest insulating layer between the magnet and steel
- under axial application of breakaway force (90-degree angle)
- at room temperature
Determinants of practical lifting force of a magnet
- Distance (between the magnet and the metal), as even a very small clearance (e.g. 0.5 mm) leads to a reduction in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
- Force direction – note that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
- Steel thickness – too thin sheet does not accept the full field, causing part of the power to be wasted into the air.
- Material composition – not every steel reacts the same. Alloy additives weaken the interaction with the magnet.
- Smoothness – ideal contact is obtained only on polished steel. Rough texture reduce the real contact area, reducing force.
- Thermal factor – high temperature reduces pulling force. Too high temperature can permanently damage the magnet.
Lifting capacity was assessed by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular detachment force, however under shearing force the load capacity is reduced by as much as 75%. In addition, even a minimal clearance between the magnet and the plate decreases the holding force.
Safety rules for work with NdFeB magnets
Allergy Warning
Studies show that nickel (standard magnet coating) is a potent allergen. If you have an allergy, avoid touching magnets with bare hands or choose coated magnets.
Threat to navigation
Navigation devices and mobile phones are highly sensitive to magnetism. Close proximity with a strong magnet can permanently damage the sensors in your phone.
Handling rules
Use magnets consciously. Their huge power can surprise even experienced users. Be vigilant and respect their force.
Health Danger
Patients with a ICD have to maintain an safe separation from magnets. The magnetism can disrupt the operation of the implant.
Electronic hazard
Equipment safety: Strong magnets can damage data carriers and sensitive devices (heart implants, medical aids, mechanical watches).
Combustion hazard
Combustion risk: Neodymium dust is highly flammable. Avoid machining magnets in home conditions as this risks ignition.
Finger safety
Protect your hands. Two powerful magnets will join immediately with a force of several hundred kilograms, destroying everything in their path. Be careful!
Beware of splinters
Neodymium magnets are ceramic materials, meaning they are very brittle. Impact of two magnets leads to them shattering into small pieces.
Demagnetization risk
Keep cool. Neodymium magnets are susceptible to heat. If you need operation above 80°C, look for special high-temperature series (H, SH, UH).
No play value
Absolutely store magnets out of reach of children. Ingestion danger is significant, and the effects of magnets clamping inside the body are tragic.
