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
bulk discounts:
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Technical parameters of the product - 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 |
Physical simulation of the magnet - data
These values represent the direct effect of a engineering analysis. Results are based on models for the material Nd2Fe14B. Operational parameters may differ. Treat these calculations as a preliminary roadmap during assembly planning.
Table 1: Static pull force (force vs distance) - characteristics
MW 29x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg) | Risk Status |
|---|---|---|---|
| 0 mm |
3518 Gs
351.8 mT
|
20.82 kg / 20820.0 g
204.2 N
|
dangerous! |
| 1 mm |
3321 Gs
332.1 mT
|
18.55 kg / 18548.8 g
182.0 N
|
dangerous! |
| 2 mm |
3106 Gs
310.6 mT
|
16.23 kg / 16226.1 g
159.2 N
|
dangerous! |
| 3 mm |
2883 Gs
288.3 mT
|
13.98 kg / 13978.2 g
137.1 N
|
dangerous! |
| 5 mm |
2437 Gs
243.7 mT
|
9.99 kg / 9987.1 g
98.0 N
|
warning |
| 10 mm |
1500 Gs
150.0 mT
|
3.78 kg / 3783.1 g
37.1 N
|
warning |
| 15 mm |
905 Gs
90.5 mT
|
1.38 kg / 1379.2 g
13.5 N
|
weak grip |
| 20 mm |
563 Gs
56.3 mT
|
0.53 kg / 532.4 g
5.2 N
|
weak grip |
| 30 mm |
247 Gs
24.7 mT
|
0.10 kg / 102.4 g
1.0 N
|
weak grip |
| 50 mm |
72 Gs
7.2 mT
|
0.01 kg / 8.7 g
0.1 N
|
weak grip |
Table 2: Shear capacity (wall)
MW 29x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg) |
|---|---|---|
| 0 mm | Stal (~0.2) |
4.16 kg / 4164.0 g
40.8 N
|
| 1 mm | Stal (~0.2) |
3.71 kg / 3710.0 g
36.4 N
|
| 2 mm | Stal (~0.2) |
3.25 kg / 3246.0 g
31.8 N
|
| 3 mm | Stal (~0.2) |
2.80 kg / 2796.0 g
27.4 N
|
| 5 mm | Stal (~0.2) |
2.00 kg / 1998.0 g
19.6 N
|
| 10 mm | Stal (~0.2) |
0.76 kg / 756.0 g
7.4 N
|
| 15 mm | Stal (~0.2) |
0.28 kg / 276.0 g
2.7 N
|
| 20 mm | Stal (~0.2) |
0.11 kg / 106.0 g
1.0 N
|
| 30 mm | Stal (~0.2) |
0.02 kg / 20.0 g
0.2 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 2.0 g
0.0 N
|
Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MW 29x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
6.25 kg / 6246.0 g
61.3 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
4.16 kg / 4164.0 g
40.8 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
2.08 kg / 2082.0 g
20.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
10.41 kg / 10410.0 g
102.1 N
|
Table 4: Material efficiency (saturation) - power losses
MW 29x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg) |
|---|---|---|
| 0.5 mm |
|
1.04 kg / 1041.0 g
10.2 N
|
| 1 mm |
|
2.60 kg / 2602.5 g
25.5 N
|
| 2 mm |
|
5.21 kg / 5205.0 g
51.1 N
|
| 5 mm |
|
13.01 kg / 13012.5 g
127.7 N
|
| 10 mm |
|
20.82 kg / 20820.0 g
204.2 N
|
Table 5: Thermal resistance (stability) - thermal limit
MW 29x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull | Status |
|---|---|---|---|
| 20 °C | 0.0% |
20.82 kg / 20820.0 g
204.2 N
|
OK |
| 40 °C | -2.2% |
20.36 kg / 20362.0 g
199.8 N
|
OK |
| 60 °C | -4.4% |
19.90 kg / 19903.9 g
195.3 N
|
|
| 80 °C | -6.6% |
19.45 kg / 19445.9 g
190.8 N
|
|
| 100 °C | -28.8% |
14.82 kg / 14823.8 g
145.4 N
|
Table 6: Two magnets (attraction) - field range
MW 29x10 / N38
| Gap (mm) | Attraction (kg) (N-S) | Repulsion (kg) (N-N) |
|---|---|---|
| 0 mm |
50.40 kg / 50399 g
494.4 N
5 016 Gs
|
N/A |
| 1 mm |
47.70 kg / 47704 g
468.0 N
6 845 Gs
|
42.93 kg / 42934 g
421.2 N
~0 Gs
|
| 2 mm |
44.90 kg / 44901 g
440.5 N
6 641 Gs
|
40.41 kg / 40411 g
396.4 N
~0 Gs
|
| 3 mm |
42.08 kg / 42082 g
412.8 N
6 429 Gs
|
37.87 kg / 37874 g
371.5 N
~0 Gs
|
| 5 mm |
36.52 kg / 36522 g
358.3 N
5 990 Gs
|
32.87 kg / 32870 g
322.5 N
~0 Gs
|
| 10 mm |
24.18 kg / 24176 g
237.2 N
4 873 Gs
|
21.76 kg / 21758 g
213.4 N
~0 Gs
|
| 20 mm |
9.16 kg / 9158 g
89.8 N
2 999 Gs
|
8.24 kg / 8242 g
80.9 N
~0 Gs
|
| 50 mm |
0.54 kg / 542 g
5.3 N
729 Gs
|
0.49 kg / 487 g
4.8 N
~0 Gs
|
Table 7: Safety (HSE) (implants) - precautionary measures
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 |
| Timepiece | 20 Gs (2.0 mT) | 8.5 cm |
| Phone / Smartphone | 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 (kinetic energy) - 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: Surface protection spec
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: Hydrostatics and buoyancy
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
*Caution: On a vertical surface, the magnet holds just approx. 20-30% of its max power.
2. Efficiency vs thickness
*Thin steel (e.g. computer case) significantly limits the holding force.
3. Temperature resistance
*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) = 0.45
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
See also deals
Advantages as well as disadvantages of neodymium magnets.
Advantages
- They do not lose magnetism, even over nearly 10 years – the decrease in strength is only ~1% (based on measurements),
- They possess excellent resistance to magnetic field loss as a result of external magnetic sources,
- Thanks to the shimmering finish, the surface of Ni-Cu-Ni, gold-plated, or silver gives an aesthetic appearance,
- Neodymium magnets generate maximum magnetic induction on a their surface, which ensures high operational effectiveness,
- Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling operation at temperatures approaching 230°C and above...
- Thanks to the option of flexible molding and customization to custom projects, NdFeB magnets can be manufactured in a broad palette of shapes and sizes, which expands the range of possible applications,
- Significant place in innovative solutions – they are commonly used in data components, electric motors, precision medical tools, also technologically advanced constructions.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Weaknesses
- They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
- NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop 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
- 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 as well as corrosion.
- Due to limitations in creating nuts and complex forms in magnets, we propose using cover - magnetic mount.
- Health risk resulting from small fragments of magnets are risky, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Furthermore, small components of these products can complicate diagnosis medical when they are in the body.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities
Holding force characteristics
Maximum lifting force for a neodymium magnet – what affects it?
- on a block made of structural steel, effectively closing the magnetic flux
- possessing a massiveness of min. 10 mm to ensure full flux closure
- with a plane free of scratches
- under conditions of no distance (surface-to-surface)
- under axial force vector (90-degree angle)
- at room temperature
Practical lifting capacity: influencing factors
- Distance (between the magnet and the metal), as even a tiny clearance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to paint, rust or dirt).
- Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
- Steel thickness – too thin sheet does not accept the full field, causing part of the power to be wasted into the air.
- Metal type – different alloys reacts the same. Alloy additives worsen the attraction effect.
- Plate texture – smooth surfaces ensure maximum contact, which improves force. Uneven metal reduce efficiency.
- Thermal environment – temperature increase causes a temporary drop of force. Check the thermal limit for a given model.
Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the load capacity is reduced by as much as 75%. Moreover, even a minimal clearance between the magnet’s surface and the plate reduces the load capacity.
Safe handling of neodymium magnets
Operating temperature
Avoid heat. Neodymium magnets are sensitive to temperature. If you require operation above 80°C, inquire about special high-temperature series (H, SH, UH).
Caution required
Exercise caution. Neodymium magnets act from a long distance and connect with huge force, often quicker than you can move away.
Magnet fragility
Watch out for shards. Magnets can explode upon violent connection, ejecting shards into the air. Wear goggles.
Fire warning
Powder created during cutting of magnets is flammable. Do not drill into magnets unless you are an expert.
No play value
Only for adults. Tiny parts can be swallowed, causing intestinal necrosis. Store out of reach of kids and pets.
GPS and phone interference
Remember: rare earth magnets produce a field that disrupts precision electronics. Maintain a separation from your phone, device, and GPS.
Pinching danger
Protect your hands. Two powerful magnets will snap together instantly with a force of massive weight, destroying everything in their path. Exercise extreme caution!
Cards and drives
Intense magnetic fields can destroy records on payment cards, HDDs, and storage devices. Keep a distance of at least 10 cm.
Nickel coating and allergies
A percentage of the population experience a contact allergy to Ni, which is the common plating for neodymium magnets. Frequent touching might lead to a rash. We suggest use protective gloves.
Warning for heart patients
For implant holders: Powerful magnets affect medical devices. Maintain minimum 30 cm distance or request help to work with the magnets.
