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
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
21.56 zł net / pcs
26.52 zł with VAT (23% VAT) / pcs
bulk discounts:
Need more?Frequently asked questions
What is the maximum working temperature of a disc magnet?
What is the difference between N38, N42 and N52?
What is the dimensional tolerance?
Engineering report for this magnet
Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.
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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 |
|---|---|---|
| Remanence Br ? | 12.2-12.6 | kGs |
| Remanence Br ? | 1220-1260 | mT |
| Coercivity bHc ? | 10.8-11.5 | kOe |
| Coercivity bHc ? | 860-915 | kA/m |
| Intrinsic coercivity iHc | ≥ 12 | kOe |
| Intrinsic coercivity iHc | ≥ 955 | kA/m |
| Energy product BHmax ? | 36-38 | BH max MGOe |
| Energy product BHmax ? | 287-303 | BH max KJ/m |
| Maximum working 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 | 310 | °C |
| Curie Temperature TF | 590 | °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 modeling of the product - data
These information are the outcome of a physical simulation. Values were calculated on models for the material Nd2Fe14B. Actual conditions might slightly differ from theoretical values. Treat these data as a reference point when designing systems.
Table 1: Static pull force (force vs gap) - interaction chart
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
|
crushing |
| 1 mm |
3064 Gs
306.4 mT
|
21.54 kg / 47.49 lbs
21539.1 g / 211.3 N
|
crushing |
| 2 mm |
2901 Gs
290.1 mT
|
19.30 kg / 42.55 lbs
19302.3 g / 189.4 N
|
crushing |
| 3 mm |
2728 Gs
272.8 mT
|
17.07 kg / 37.64 lbs
17072.3 g / 167.5 N
|
crushing |
| 5 mm |
2373 Gs
237.3 mT
|
12.91 kg / 28.47 lbs
12913.7 g / 126.7 N
|
crushing |
| 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: Shear force (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) - 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 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 (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 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 (stability) - resistance threshold
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 (repulsion) - field collision
MW 33x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding 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: Hazards (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 |
| Mechanical watch | 20 Gs (2.0 mT) | 9.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 7.0 cm |
| Car key | 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) - collision effects
MW 33x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
23.18 km/h
(6.44 m/s)
|
1.33 J | |
| 30 mm |
25.71 km/h
(7.14 m/s)
|
1.64 J | |
| 50 mm |
25.82 km/h
(7.17 m/s)
|
1.65 J | |
| 100 mm |
25.84 km/h
(7.18 m/s)
|
1.65 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: Construction 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
*Warning: On a vertical surface, the magnet retains merely ~20% of its max power.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) significantly reduces the holding force.
3. Heat tolerance
*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) = 0.40
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.
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other deals
Strengths and weaknesses of Nd2Fe14B magnets.
Strengths
- They do not lose strength, even after approximately 10 years – the decrease in strength is only ~1% (theoretically),
- They are resistant to demagnetization induced by external field influence,
- In other words, due to the glossy layer of nickel, the element is aesthetically pleasing,
- The surface of neodymium magnets generates a strong magnetic field – this is a key feature,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
- Thanks to modularity in constructing and the capacity to adapt to unusual requirements,
- Versatile presence in advanced technology sectors – they are utilized in mass storage devices, electric drive systems, medical devices, and multitasking production systems.
- Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which enables their usage in miniature devices
Weaknesses
- At very strong impacts they can break, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- Magnets exposed to a humid environment can rust. Therefore while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
- Limited possibility of making threads in the magnet and complex shapes - recommended is casing - magnetic holder.
- Potential hazard to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the aspect of protecting the youngest. Additionally, small components of these devices are able to complicate diagnosis medical when they are in the body.
- With large orders the cost of neodymium magnets is economically unviable,
Lifting parameters
Breakaway strength of the magnet in ideal conditions – what it depends on?
- on a plate made of mild steel, perfectly concentrating the magnetic flux
- with a thickness no less than 10 mm
- with a surface perfectly flat
- with total lack of distance (no paint)
- for force acting at a right angle (pull-off, not shear)
- at standard ambient temperature
Magnet lifting force in use – key factors
- Air gap (betwixt the magnet and the metal), because even a very small clearance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to varnish, rust or debris).
- Load vector – maximum parameter is obtained only during pulling at a 90° angle. The shear force of the magnet along the surface is typically several times lower (approx. 1/5 of the lifting capacity).
- Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
- Steel grade – ideal substrate is pure iron steel. Cast iron may generate lower lifting capacity.
- Surface structure – the smoother and more polished the surface, the better the adhesion and stronger the hold. Unevenness creates an air distance.
- Thermal environment – heating the magnet results in weakening of force. It is worth remembering the maximum operating temperature for a given model.
Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the lifting capacity is smaller. Additionally, even a slight gap between the magnet’s surface and the plate reduces the load capacity.
Safety rules for work with NdFeB magnets
Choking Hazard
These products are not suitable for play. Accidental ingestion of multiple magnets can lead to them attracting across intestines, which constitutes a critical condition and necessitates urgent medical intervention.
Avoid contact if allergic
Allergy Notice: The Ni-Cu-Ni coating contains nickel. If skin irritation happens, cease handling magnets and use protective gear.
Fragile material
Watch out for shards. Magnets can explode upon uncontrolled impact, launching shards into the air. We recommend safety glasses.
Flammability
Dust created during grinding of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.
Implant safety
Individuals with a pacemaker must maintain an absolute distance from magnets. The magnetism can stop the operation of the implant.
Crushing force
Watch your fingers. Two powerful magnets will join instantly with a force of several hundred kilograms, crushing anything in their path. Be careful!
Data carriers
Do not bring magnets close to a wallet, computer, or screen. The magnetic field can destroy these devices and wipe information from cards.
Thermal limits
Do not overheat. Neodymium magnets are susceptible to temperature. If you require resistance above 80°C, ask us about HT versions (H, SH, UH).
Safe operation
Use magnets with awareness. Their immense force can surprise even experienced users. Be vigilant and respect their force.
Compass and GPS
Navigation devices and smartphones are extremely susceptible to magnetic fields. Direct contact with a strong magnet can decalibrate the sensors in your phone.
