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 parameters - 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 |
Physical modeling of the magnet - technical parameters
The following data represent the result of a mathematical simulation. Values are based on algorithms for the class Nd2Fe14B. Actual parameters may deviate from the simulation results. Use these data as a reference point during assembly planning.
Table 1: Static pull force (pull vs distance) - 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
|
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
|
weak grip |
| 30 mm |
299 Gs
29.9 mT
|
0.21 kg / 0.45 LBS
205.1 g / 2.0 N
|
weak grip |
| 50 mm |
90 Gs
9.0 mT
|
0.02 kg / 0.04 LBS
18.7 g / 0.2 N
|
weak grip |
Table 2: Slippage load (wall)
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: Vertical assembly (sliding) - 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: 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 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) - thermal limit
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) - forces in the system
MW 33x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (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) (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: Impact energy (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: Coating parameters (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: Hydrostatics and buoyancy
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. Sliding resistance
*Warning: On a vertical surface, the magnet retains only approx. 20-30% of its max power.
2. Steel saturation
*Thin metal sheet (e.g. 0.5mm PC case) significantly limits the holding force.
3. Temperature resistance
*For N38 grade, 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
The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. 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 |
Other products
Pros and cons of Nd2Fe14B magnets.
Pros
- They do not lose power, even after approximately ten years – the reduction in power is only ~1% (according to tests),
- Magnets perfectly resist against loss of magnetization caused by external fields,
- By covering with a decorative layer of gold, the element acquires an aesthetic look,
- Magnetic induction on the top side of the magnet turns out to be impressive,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
- Thanks to the ability of free forming and customization to custom requirements, magnetic components can be produced in a variety of shapes and sizes, which increases their versatility,
- Key role in modern technologies – they are used in mass storage devices, brushless drives, diagnostic systems, and other advanced devices.
- Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,
Disadvantages
- To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
- We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- They rust in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
- Limited possibility of making nuts in the magnet and complicated forms - preferred is a housing - mounting mechanism.
- Possible danger related to microscopic parts of magnets are risky, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, small elements of these devices can complicate diagnosis medical after entering the body.
- With large orders the cost of neodymium magnets is economically unviable,
Pull force analysis
Best holding force of the magnet in ideal parameters – what it depends on?
- with the use of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
- with a cross-section no less than 10 mm
- with a plane cleaned and smooth
- under conditions of gap-free contact (surface-to-surface)
- under axial application of breakaway force (90-degree angle)
- at ambient temperature approx. 20 degrees Celsius
Impact of factors on magnetic holding capacity in practice
- Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) diminishes the pulling force, often by half at just 0.5 mm.
- Load vector – maximum parameter is obtained only during pulling at a 90° angle. The shear force of the magnet along the surface is usually several times smaller (approx. 1/5 of the lifting capacity).
- Element thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet restricts the attraction force (the magnet "punches through" it).
- Material composition – not every steel attracts identically. High carbon content worsen the interaction with the magnet.
- Plate texture – smooth surfaces guarantee perfect abutment, which increases field saturation. Uneven metal weaken the grip.
- Operating temperature – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).
Lifting capacity testing was carried out on a smooth plate of optimal thickness, under perpendicular forces, however under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate decreases the lifting capacity.
Safety rules for work with NdFeB magnets
Conscious usage
Handle magnets with awareness. Their immense force can shock even experienced users. Stay alert and respect their power.
GPS Danger
Remember: rare earth magnets produce a field that interferes with precision electronics. Maintain a safe distance from your mobile, tablet, and navigation systems.
Combustion hazard
Drilling and cutting of NdFeB material poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.
Warning for heart patients
Individuals with a ICD must keep an absolute distance from magnets. The magnetic field can interfere with the operation of the life-saving device.
Keep away from children
Adult use only. Small elements pose a choking risk, leading to intestinal necrosis. Store out of reach of children and animals.
Crushing risk
Pinching hazard: The attraction force is so immense that it can result in blood blisters, pinching, and broken bones. Use thick gloves.
Magnetic media
Avoid bringing magnets close to a purse, laptop, or screen. The magnetism can irreversibly ruin these devices and erase data from cards.
Heat warning
Avoid heat. NdFeB magnets are susceptible to heat. If you require operation above 80°C, ask us about HT versions (H, SH, UH).
Risk of cracking
Protect your eyes. Magnets can explode upon violent connection, ejecting shards into the air. We recommend safety glasses.
Metal Allergy
Studies show that the nickel plating (standard magnet coating) is a common allergen. If you have an allergy, refrain from direct skin contact or choose encased magnets.
