MW 29x10 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010053
GTIN/EAN: 5906301810520
Diameter Ø
29 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
49.54 g
Magnetization Direction
↑ axial
Load capacity
20.82 kg / 204.22 N
Magnetic Induction
351.88 mT / 3519 Gs
Coating
[NiCuNi] Nickel
17.34 ZŁ with VAT / pcs + price for transport
14.10 ZŁ net + 23% VAT / pcs
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Technical - MW 29x10 / N38 - cylindrical magnet
Specification / characteristics - MW 29x10 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010053 |
| GTIN/EAN | 5906301810520 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 29 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 49.54 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 20.82 kg / 204.22 N |
| Magnetic Induction ~ ? | 351.88 mT / 3519 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 modeling of the assembly - technical parameters
These information represent the direct effect of a engineering simulation. Results were calculated on algorithms for the class Nd2Fe14B. Actual performance may differ from theoretical values. Use these data as a reference point when designing systems.
Table 1: Static force (force vs distance) - power drop
MW 29x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3518 Gs
351.8 mT
|
20.82 kg / 45.90 LBS
20820.0 g / 204.2 N
|
crushing |
| 1 mm |
3321 Gs
332.1 mT
|
18.55 kg / 40.89 LBS
18548.8 g / 182.0 N
|
crushing |
| 2 mm |
3106 Gs
310.6 mT
|
16.23 kg / 35.77 LBS
16226.1 g / 159.2 N
|
crushing |
| 3 mm |
2883 Gs
288.3 mT
|
13.98 kg / 30.82 LBS
13978.2 g / 137.1 N
|
crushing |
| 5 mm |
2437 Gs
243.7 mT
|
9.99 kg / 22.02 LBS
9987.1 g / 98.0 N
|
warning |
| 10 mm |
1500 Gs
150.0 mT
|
3.78 kg / 8.34 LBS
3783.1 g / 37.1 N
|
warning |
| 15 mm |
905 Gs
90.5 mT
|
1.38 kg / 3.04 LBS
1379.2 g / 13.5 N
|
low risk |
| 20 mm |
563 Gs
56.3 mT
|
0.53 kg / 1.17 LBS
532.4 g / 5.2 N
|
low risk |
| 30 mm |
247 Gs
24.7 mT
|
0.10 kg / 0.23 LBS
102.4 g / 1.0 N
|
low risk |
| 50 mm |
72 Gs
7.2 mT
|
0.01 kg / 0.02 LBS
8.7 g / 0.1 N
|
low risk |
Table 2: Shear load (wall)
MW 29x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
4.16 kg / 9.18 LBS
4164.0 g / 40.8 N
|
| 1 mm | Stal (~0.2) |
3.71 kg / 8.18 LBS
3710.0 g / 36.4 N
|
| 2 mm | Stal (~0.2) |
3.25 kg / 7.16 LBS
3246.0 g / 31.8 N
|
| 3 mm | Stal (~0.2) |
2.80 kg / 6.16 LBS
2796.0 g / 27.4 N
|
| 5 mm | Stal (~0.2) |
2.00 kg / 4.40 LBS
1998.0 g / 19.6 N
|
| 10 mm | Stal (~0.2) |
0.76 kg / 1.67 LBS
756.0 g / 7.4 N
|
| 15 mm | Stal (~0.2) |
0.28 kg / 0.61 LBS
276.0 g / 2.7 N
|
| 20 mm | Stal (~0.2) |
0.11 kg / 0.23 LBS
106.0 g / 1.0 N
|
| 30 mm | Stal (~0.2) |
0.02 kg / 0.04 LBS
20.0 g / 0.2 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
2.0 g / 0.0 N
|
Table 3: Vertical assembly (sliding) - vertical pull
MW 29x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
6.25 kg / 13.77 LBS
6246.0 g / 61.3 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
4.16 kg / 9.18 LBS
4164.0 g / 40.8 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
2.08 kg / 4.59 LBS
2082.0 g / 20.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
10.41 kg / 22.95 LBS
10410.0 g / 102.1 N
|
Table 4: Steel thickness (saturation) - power losses
MW 29x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
1.04 kg / 2.30 LBS
1041.0 g / 10.2 N
|
| 1 mm |
|
2.60 kg / 5.74 LBS
2602.5 g / 25.5 N
|
| 2 mm |
|
5.21 kg / 11.48 LBS
5205.0 g / 51.1 N
|
| 3 mm |
|
7.81 kg / 17.21 LBS
7807.5 g / 76.6 N
|
| 5 mm |
|
13.01 kg / 28.69 LBS
13012.5 g / 127.7 N
|
| 10 mm |
|
20.82 kg / 45.90 LBS
20820.0 g / 204.2 N
|
| 11 mm |
|
20.82 kg / 45.90 LBS
20820.0 g / 204.2 N
|
| 12 mm |
|
20.82 kg / 45.90 LBS
20820.0 g / 204.2 N
|
Table 5: Working in heat (stability) - resistance threshold
MW 29x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
20.82 kg / 45.90 LBS
20820.0 g / 204.2 N
|
OK |
| 40 °C | -2.2% |
20.36 kg / 44.89 LBS
20362.0 g / 199.8 N
|
OK |
| 60 °C | -4.4% |
19.90 kg / 43.88 LBS
19903.9 g / 195.3 N
|
|
| 80 °C | -6.6% |
19.45 kg / 42.87 LBS
19445.9 g / 190.8 N
|
|
| 100 °C | -28.8% |
14.82 kg / 32.68 LBS
14823.8 g / 145.4 N
|
Table 6: Two magnets (repulsion) - field collision
MW 29x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
50.40 kg / 111.11 LBS
5 016 Gs
|
7.56 kg / 16.67 LBS
7560 g / 74.2 N
|
N/A |
| 1 mm |
47.70 kg / 105.17 LBS
6 845 Gs
|
7.16 kg / 15.78 LBS
7156 g / 70.2 N
|
42.93 kg / 94.65 LBS
~0 Gs
|
| 2 mm |
44.90 kg / 98.99 LBS
6 641 Gs
|
6.74 kg / 14.85 LBS
6735 g / 66.1 N
|
40.41 kg / 89.09 LBS
~0 Gs
|
| 3 mm |
42.08 kg / 92.77 LBS
6 429 Gs
|
6.31 kg / 13.92 LBS
6312 g / 61.9 N
|
37.87 kg / 83.50 LBS
~0 Gs
|
| 5 mm |
36.52 kg / 80.52 LBS
5 990 Gs
|
5.48 kg / 12.08 LBS
5478 g / 53.7 N
|
32.87 kg / 72.47 LBS
~0 Gs
|
| 10 mm |
24.18 kg / 53.30 LBS
4 873 Gs
|
3.63 kg / 7.99 LBS
3626 g / 35.6 N
|
21.76 kg / 47.97 LBS
~0 Gs
|
| 20 mm |
9.16 kg / 20.19 LBS
2 999 Gs
|
1.37 kg / 3.03 LBS
1374 g / 13.5 N
|
8.24 kg / 18.17 LBS
~0 Gs
|
| 50 mm |
0.54 kg / 1.19 LBS
729 Gs
|
0.08 kg / 0.18 LBS
81 g / 0.8 N
|
0.49 kg / 1.07 LBS
~0 Gs
|
| 60 mm |
0.25 kg / 0.55 LBS
493 Gs
|
0.04 kg / 0.08 LBS
37 g / 0.4 N
|
0.22 kg / 0.49 LBS
~0 Gs
|
| 70 mm |
0.12 kg / 0.27 LBS
347 Gs
|
0.02 kg / 0.04 LBS
18 g / 0.2 N
|
0.11 kg / 0.24 LBS
~0 Gs
|
| 80 mm |
0.06 kg / 0.14 LBS
252 Gs
|
0.01 kg / 0.02 LBS
10 g / 0.1 N
|
0.06 kg / 0.13 LBS
~0 Gs
|
| 90 mm |
0.04 kg / 0.08 LBS
188 Gs
|
0.01 kg / 0.01 LBS
5 g / 0.1 N
|
0.03 kg / 0.07 LBS
~0 Gs
|
| 100 mm |
0.02 kg / 0.05 LBS
144 Gs
|
0.00 kg / 0.01 LBS
3 g / 0.0 N
|
0.02 kg / 0.04 LBS
~0 Gs
|
Table 7: Protective zones (electronics) - warnings
MW 29x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 13.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 10.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 8.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 6.5 cm |
| Car key | 50 Gs (5.0 mT) | 6.0 cm |
| Payment card | 400 Gs (40.0 mT) | 2.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 2.0 cm |
Table 8: Dynamics (cracking risk) - warning
MW 29x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
22.90 km/h
(6.36 m/s)
|
1.00 J | |
| 30 mm |
35.92 km/h
(9.98 m/s)
|
2.47 J | |
| 50 mm |
46.24 km/h
(12.85 m/s)
|
4.09 J | |
| 100 mm |
65.38 km/h
(18.16 m/s)
|
8.17 J |
Table 9: Anti-corrosion coating durability
MW 29x10 / 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 29x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 24 471 Mx | 244.7 µWb |
| Pc Coefficient | 0.45 | Low (Flat) |
Table 11: Submerged application
MW 29x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 20.82 kg | Standard |
| Water (riverbed) |
23.84 kg
(+3.02 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Warning: On a vertical wall, the magnet retains only approx. 20-30% of its nominal pull.
2. Plate thickness effect
*Thin metal sheet (e.g. 0.5mm PC case) severely weakens the holding force.
3. Heat tolerance
*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) = 0.45
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
See also deals
Pros and cons of rare earth magnets.
Benefits
- They do not lose strength, even during around 10 years – the decrease in lifting capacity is only ~1% (theoretically),
- They retain their magnetic properties even under strong external field,
- The use of an elegant finish of noble metals (nickel, gold, silver) causes the element to have aesthetics,
- They show high magnetic induction at the operating surface, which affects their effectiveness,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Thanks to flexibility in designing and the ability to modify to complex applications,
- Significant place in future technologies – they are utilized in data components, electric motors, medical devices, also complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which enables their usage in compact constructions
Weaknesses
- Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a steel housing, which not only protects them against impacts but also raises their durability
- We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
- They oxidize in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
- Due to limitations in realizing threads and complicated shapes in magnets, we recommend using a housing - magnetic mechanism.
- Potential hazard to health – tiny shards of magnets pose a threat, if swallowed, which gains importance in the context of child health protection. Furthermore, small elements of these products can be problematic in diagnostics medical when they are in the body.
- With large orders the cost of neodymium magnets is a challenge,
Pull force analysis
Optimal lifting capacity of a neodymium magnet – what contributes to it?
- using a plate made of mild steel, acting as a magnetic yoke
- with a thickness minimum 10 mm
- with a surface perfectly flat
- without the slightest insulating layer between the magnet and steel
- during detachment in a direction vertical to the mounting surface
- at conditions approx. 20°C
Magnet lifting force in use – key factors
- Gap (betwixt the magnet and the metal), because even a tiny clearance (e.g. 0.5 mm) results in a reduction in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
- Direction of force – maximum parameter is available only during perpendicular pulling. The shear force of the magnet along the surface is standardly several times smaller (approx. 1/5 of the lifting capacity).
- Base massiveness – insufficiently thick plate causes magnetic saturation, causing part of the flux to be wasted into the air.
- Material type – the best choice is pure iron steel. Cast iron may generate lower lifting capacity.
- Plate texture – ground elements guarantee perfect abutment, which increases field saturation. Rough surfaces weaken the grip.
- Heat – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and at low temperatures gain strength (up to a certain limit).
Lifting capacity was assessed using a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, however under shearing force the holding force is lower. Moreover, even a small distance between the magnet and the plate decreases the holding force.
H&S for magnets
Combustion hazard
Fire hazard: Neodymium dust is explosive. Do not process magnets in home conditions as this may cause fire.
Magnets are brittle
Despite metallic appearance, the material is brittle and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.
Life threat
Medical warning: Strong magnets can turn off pacemakers and defibrillators. Stay away if you have electronic implants.
Immense force
Handle magnets consciously. Their immense force can surprise even experienced users. Be vigilant and respect their force.
Data carriers
Powerful magnetic fields can destroy records on credit cards, hard drives, and storage devices. Stay away of min. 10 cm.
GPS Danger
Navigation devices and mobile phones are extremely sensitive to magnetic fields. Direct contact with a powerful NdFeB magnet can ruin the internal compass in your phone.
Danger to the youngest
Absolutely keep magnets out of reach of children. Ingestion danger is significant, and the consequences of magnets clamping inside the body are very dangerous.
Metal Allergy
Certain individuals experience a sensitization to nickel, which is the typical protective layer for NdFeB magnets. Extended handling can result in an allergic reaction. We suggest use safety gloves.
Power loss in heat
Control the heat. Heating the magnet above 80 degrees Celsius will destroy its properties and strength.
Crushing risk
Risk of injury: The pulling power is so great that it can cause blood blisters, pinching, and broken bones. Use thick gloves.
