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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Technical specification of the product - 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 simulation of the magnet - data
The following information are the direct effect of a engineering simulation. Results were calculated on algorithms for the class Nd2Fe14B. Real-world conditions may differ from theoretical values. Treat these calculations as a preliminary roadmap for designers.
Table 1: Static force (force vs gap) - characteristics
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 LBS
23670.0 g / 232.2 N
|
dangerous! |
| 1 mm |
3064 Gs
306.4 mT
|
21.54 kg / 47.49 LBS
21539.1 g / 211.3 N
|
dangerous! |
| 2 mm |
2901 Gs
290.1 mT
|
19.30 kg / 42.55 LBS
19302.3 g / 189.4 N
|
dangerous! |
| 3 mm |
2728 Gs
272.8 mT
|
17.07 kg / 37.64 LBS
17072.3 g / 167.5 N
|
dangerous! |
| 5 mm |
2373 Gs
237.3 mT
|
12.91 kg / 28.47 LBS
12913.7 g / 126.7 N
|
dangerous! |
| 10 mm |
1569 Gs
156.9 mT
|
5.65 kg / 12.45 LBS
5648.1 g / 55.4 N
|
medium risk |
| 15 mm |
1004 Gs
100.4 mT
|
2.31 kg / 5.10 LBS
2312.6 g / 22.7 N
|
medium risk |
| 20 mm |
650 Gs
65.0 mT
|
0.97 kg / 2.14 LBS
969.4 g / 9.5 N
|
low risk |
| 30 mm |
299 Gs
29.9 mT
|
0.21 kg / 0.45 LBS
205.1 g / 2.0 N
|
low risk |
| 50 mm |
90 Gs
9.0 mT
|
0.02 kg / 0.04 LBS
18.7 g / 0.2 N
|
low risk |
Table 2: Slippage 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 LBS
4734.0 g / 46.4 N
|
| 1 mm | Stal (~0.2) |
4.31 kg / 9.50 LBS
4308.0 g / 42.3 N
|
| 2 mm | Stal (~0.2) |
3.86 kg / 8.51 LBS
3860.0 g / 37.9 N
|
| 3 mm | Stal (~0.2) |
3.41 kg / 7.53 LBS
3414.0 g / 33.5 N
|
| 5 mm | Stal (~0.2) |
2.58 kg / 5.69 LBS
2582.0 g / 25.3 N
|
| 10 mm | Stal (~0.2) |
1.13 kg / 2.49 LBS
1130.0 g / 11.1 N
|
| 15 mm | Stal (~0.2) |
0.46 kg / 1.02 LBS
462.0 g / 4.5 N
|
| 20 mm | Stal (~0.2) |
0.19 kg / 0.43 LBS
194.0 g / 1.9 N
|
| 30 mm | Stal (~0.2) |
0.04 kg / 0.09 LBS
42.0 g / 0.4 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.01 LBS
4.0 g / 0.0 N
|
Table 3: Wall mounting (shearing) - behavior on slippery surfaces
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 LBS
7101.0 g / 69.7 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
4.73 kg / 10.44 LBS
4734.0 g / 46.4 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
2.37 kg / 5.22 LBS
2367.0 g / 23.2 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
11.84 kg / 26.09 LBS
11835.0 g / 116.1 N
|
Table 4: Steel thickness (substrate influence) - power losses
MW 33x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
1.18 kg / 2.61 LBS
1183.5 g / 11.6 N
|
| 1 mm |
|
2.96 kg / 6.52 LBS
2958.8 g / 29.0 N
|
| 2 mm |
|
5.92 kg / 13.05 LBS
5917.5 g / 58.1 N
|
| 3 mm |
|
8.88 kg / 19.57 LBS
8876.3 g / 87.1 N
|
| 5 mm |
|
14.79 kg / 32.61 LBS
14793.8 g / 145.1 N
|
| 10 mm |
|
23.67 kg / 52.18 LBS
23670.0 g / 232.2 N
|
| 11 mm |
|
23.67 kg / 52.18 LBS
23670.0 g / 232.2 N
|
| 12 mm |
|
23.67 kg / 52.18 LBS
23670.0 g / 232.2 N
|
Table 5: Thermal stability (material behavior) - 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 LBS
23670.0 g / 232.2 N
|
OK |
| 40 °C | -2.2% |
23.15 kg / 51.04 LBS
23149.3 g / 227.1 N
|
OK |
| 60 °C | -4.4% |
22.63 kg / 49.89 LBS
22628.5 g / 222.0 N
|
|
| 80 °C | -6.6% |
22.11 kg / 48.74 LBS
22107.8 g / 216.9 N
|
|
| 100 °C | -28.8% |
16.85 kg / 37.15 LBS
16853.0 g / 165.3 N
|
Table 6: Magnet-Magnet interaction (attraction) - field range
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 LBS
4 780 Gs
|
8.16 kg / 17.99 LBS
8160 g / 80.1 N
|
N/A |
| 1 mm |
52.02 kg / 114.68 LBS
6 282 Gs
|
7.80 kg / 17.20 LBS
7803 g / 76.5 N
|
46.82 kg / 103.21 LBS
~0 Gs
|
| 2 mm |
49.51 kg / 109.14 LBS
6 128 Gs
|
7.43 kg / 16.37 LBS
7426 g / 72.8 N
|
44.55 kg / 98.23 LBS
~0 Gs
|
| 3 mm |
46.95 kg / 103.50 LBS
5 968 Gs
|
7.04 kg / 15.52 LBS
7042 g / 69.1 N
|
42.25 kg / 93.15 LBS
~0 Gs
|
| 5 mm |
41.79 kg / 92.13 LBS
5 630 Gs
|
6.27 kg / 13.82 LBS
6268 g / 61.5 N
|
37.61 kg / 82.91 LBS
~0 Gs
|
| 10 mm |
29.68 kg / 65.43 LBS
4 745 Gs
|
4.45 kg / 9.82 LBS
4452 g / 43.7 N
|
26.71 kg / 58.89 LBS
~0 Gs
|
| 20 mm |
12.98 kg / 28.62 LBS
3 138 Gs
|
1.95 kg / 4.29 LBS
1947 g / 19.1 N
|
11.68 kg / 25.76 LBS
~0 Gs
|
| 50 mm |
0.99 kg / 2.18 LBS
867 Gs
|
0.15 kg / 0.33 LBS
149 g / 1.5 N
|
0.89 kg / 1.97 LBS
~0 Gs
|
| 60 mm |
0.47 kg / 1.04 LBS
598 Gs
|
0.07 kg / 0.16 LBS
71 g / 0.7 N
|
0.42 kg / 0.94 LBS
~0 Gs
|
| 70 mm |
0.24 kg / 0.53 LBS
426 Gs
|
0.04 kg / 0.08 LBS
36 g / 0.4 N
|
0.22 kg / 0.47 LBS
~0 Gs
|
| 80 mm |
0.13 kg / 0.28 LBS
312 Gs
|
0.02 kg / 0.04 LBS
19 g / 0.2 N
|
0.12 kg / 0.26 LBS
~0 Gs
|
| 90 mm |
0.07 kg / 0.16 LBS
235 Gs
|
0.01 kg / 0.02 LBS
11 g / 0.1 N
|
0.07 kg / 0.14 LBS
~0 Gs
|
| 100 mm |
0.04 kg / 0.09 LBS
181 Gs
|
0.01 kg / 0.01 LBS
6 g / 0.1 N
|
0.04 kg / 0.09 LBS
~0 Gs
|
Table 7: Safety (HSE) (implants) - warnings
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: Impact energy (cracking risk) - warning
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: Surface protection spec
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 (Pc)
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 retains only approx. 20-30% of its nominal pull.
2. Steel thickness impact
*Thin steel (e.g. computer case) significantly weakens the holding force.
3. Power loss vs temp
*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) = 0.40
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% |
Sustainability
| 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
- Their magnetic field is maintained, and after around 10 years it drops only by ~1% (theoretically),
- They retain their magnetic properties even under strong external field,
- In other words, due to the glossy layer of gold, the element looks attractive,
- They are known for high magnetic induction at the operating surface, making them more effective,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Thanks to modularity in designing and the ability to modify to client solutions,
- Wide application in electronics industry – they find application in HDD drives, electromotive mechanisms, advanced medical instruments, and multitasking production systems.
- Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which allows their use in small systems
Limitations
- They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
- Neodymium magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
- They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- We recommend casing - magnetic holder, due to difficulties in creating threads inside the magnet and complicated shapes.
- Health risk resulting from small fragments of magnets are risky, when accidentally swallowed, which gains importance in the context of child safety. Additionally, small components of these devices can complicate diagnosis medical after entering the body.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which increases costs of application in large quantities
Pull force analysis
Breakaway strength of the magnet in ideal conditions – what contributes to it?
- with the contact of a yoke made of low-carbon steel, ensuring maximum field concentration
- whose transverse dimension reaches at least 10 mm
- with an polished touching surface
- with total lack of distance (without coatings)
- for force applied at a right angle (pull-off, not shear)
- at room temperature
Determinants of practical lifting force of a magnet
- Clearance – the presence of foreign body (rust, dirt, gap) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
- Loading method – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet exhibits significantly lower power (typically approx. 20-30% of nominal force).
- Steel thickness – insufficiently thick plate causes magnetic saturation, causing part of the flux to be wasted into the air.
- Material composition – different alloys attracts identically. Alloy additives worsen the attraction effect.
- Surface structure – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
- Thermal factor – hot environment reduces pulling force. Exceeding the limit temperature can permanently damage the magnet.
Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under attempts to slide the magnet the lifting capacity is smaller. In addition, even a small distance between the magnet’s surface and the plate reduces the holding force.
H&S for magnets
Threat to electronics
Equipment safety: Strong magnets can damage data carriers and delicate electronics (heart implants, medical aids, mechanical watches).
Safe operation
Before starting, check safety instructions. Sudden snapping can destroy the magnet or injure your hand. Be predictive.
Flammability
Fire warning: Neodymium dust is highly flammable. Do not process magnets in home conditions as this risks ignition.
Skin irritation risks
Certain individuals experience a sensitization to nickel, which is the standard coating for NdFeB magnets. Prolonged contact may cause skin redness. It is best to use protective gloves.
Heat sensitivity
Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will ruin its properties and pulling force.
Fragile material
Protect your eyes. Magnets can explode upon uncontrolled impact, launching sharp fragments into the air. Wear goggles.
Bone fractures
Big blocks can break fingers instantly. Never place your hand betwixt two strong magnets.
Danger to the youngest
Product intended for adults. Tiny parts pose a choking risk, leading to serious injuries. Keep out of reach of kids and pets.
Warning for heart patients
Warning for patients: Strong magnetic fields affect electronics. Maintain minimum 30 cm distance or request help to handle the magnets.
Threat to navigation
A strong magnetic field interferes with the functioning of compasses in smartphones and GPS navigation. Maintain magnets close to a smartphone to prevent damaging the sensors.
