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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Detailed specification - 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 - technical parameters
These data represent the direct effect of a physical analysis. Results rely on algorithms for the class Nd2Fe14B. Actual conditions might slightly deviate from the simulation results. Use these calculations as a reference point during assembly planning.
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 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
|
strong |
| 15 mm |
1004 Gs
100.4 mT
|
2.31 kg / 5.10 pounds
2312.6 g / 22.7 N
|
strong |
| 20 mm |
650 Gs
65.0 mT
|
0.97 kg / 2.14 pounds
969.4 g / 9.5 N
|
safe |
| 30 mm |
299 Gs
29.9 mT
|
0.21 kg / 0.45 pounds
205.1 g / 2.0 N
|
safe |
| 50 mm |
90 Gs
9.0 mT
|
0.02 kg / 0.04 pounds
18.7 g / 0.2 N
|
safe |
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 (shearing) - 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: Material efficiency (saturation) - power losses
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 (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 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: Two magnets (repulsion) - field range
MW 33x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear 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: Safety (HSE) (implants) - 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 |
| Timepiece | 20 Gs (2.0 mT) | 9.0 cm |
| Mobile device | 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: 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 (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: Submerged application
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 wall, the magnet holds just approx. 20-30% of its perpendicular strength.
2. Steel saturation
*Thin metal sheet (e.g. computer case) drastically limits the holding force.
3. Temperature resistance
*For N38 grade, 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.
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 proposals
Strengths and weaknesses of neodymium magnets.
Benefits
- They retain full power for nearly 10 years – the drop is just ~1% (based on simulations),
- They do not lose their magnetic properties even under strong external field,
- In other words, due to the metallic surface of silver, the element is aesthetically pleasing,
- Magnets have extremely high magnetic induction on the working surface,
- Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
- Thanks to versatility in designing and the ability to customize to specific needs,
- Fundamental importance in advanced technology sectors – they are commonly used in computer drives, electromotive mechanisms, medical devices, also multitasking production systems.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Cons
- At strong impacts they can crack, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
- Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
- When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
- We suggest a housing - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complicated forms.
- Potential hazard resulting from small fragments of magnets can be dangerous, in case of ingestion, which gains importance in the context of child health protection. Furthermore, small elements of these products can complicate diagnosis medical in case of swallowing.
- Due to neodymium price, their price is relatively high,
Holding force characteristics
Maximum lifting capacity of the magnet – what it depends on?
- using a sheet made of mild steel, acting as a magnetic yoke
- whose thickness is min. 10 mm
- characterized by lack of roughness
- under conditions of ideal adhesion (surface-to-surface)
- for force acting at a right angle (pull-off, not shear)
- at conditions approx. 20°C
Lifting capacity in practice – influencing factors
- Clearance – existence of any layer (rust, dirt, gap) interrupts the magnetic circuit, which reduces power steeply (even by 50% at 0.5 mm).
- Force direction – note that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the maximum value.
- Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
- Steel grade – the best choice is pure iron steel. Hardened steels may attract less.
- Smoothness – ideal contact is obtained only on polished steel. Rough texture create air cushions, reducing force.
- Temperature influence – high temperature reduces pulling force. Exceeding the limit temperature can permanently damage the magnet.
Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the holding force is lower. Moreover, even a minimal clearance between the magnet’s surface and the plate decreases the holding force.
Precautions when working with NdFeB magnets
ICD Warning
Warning for patients: Powerful magnets affect electronics. Keep at least 30 cm distance or request help to handle the magnets.
Threat to navigation
Navigation devices and mobile phones are extremely susceptible to magnetic fields. Direct contact with a strong magnet can decalibrate the sensors in your phone.
Sensitization to coating
Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If an allergic reaction appears, cease handling magnets and wear gloves.
Hand protection
Danger of trauma: The attraction force is so immense that it can cause blood blisters, pinching, and even bone fractures. Use thick gloves.
Threat to electronics
Very strong magnetic fields can destroy records on payment cards, hard drives, and other magnetic media. Maintain a gap of min. 10 cm.
Do not underestimate power
Exercise caution. Neodymium magnets act from a distance and connect with massive power, often faster than you can react.
Shattering risk
Despite the nickel coating, neodymium is delicate and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.
Dust explosion hazard
Mechanical processing of neodymium magnets carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.
Operating temperature
Avoid heat. NdFeB magnets are susceptible to heat. If you need operation above 80°C, look for HT versions (H, SH, UH).
Choking Hazard
These products are not suitable for play. Accidental ingestion of multiple magnets may result in them attracting across intestines, which constitutes a critical condition and necessitates urgent medical intervention.
