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:
Need more?
Contact us by phone
+48 888 99 98 98
if you prefer contact us via
our online form
the contact form page.
Weight as well as form of a magnet can be checked on our
modular calculator.
Same-day processing for orders placed before 14:00.
Physical properties - 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 - data
Presented data constitute the direct effect of a mathematical simulation. Results are based on models for the class Nd2Fe14B. Operational conditions might slightly deviate from the simulation results. Treat these data as a preliminary roadmap for designers.
Table 1: Static pull force (pull 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
|
crushing |
| 1 mm |
3321 Gs
332.1 mT
|
18.55 kg / 18548.8 g
182.0 N
|
crushing |
| 2 mm |
3106 Gs
310.6 mT
|
16.23 kg / 16226.1 g
159.2 N
|
crushing |
| 3 mm |
2883 Gs
288.3 mT
|
13.98 kg / 13978.2 g
137.1 N
|
crushing |
| 5 mm |
2437 Gs
243.7 mT
|
9.99 kg / 9987.1 g
98.0 N
|
strong |
| 10 mm |
1500 Gs
150.0 mT
|
3.78 kg / 3783.1 g
37.1 N
|
strong |
| 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: Vertical 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: Vertical assembly (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: Steel thickness (substrate influence) - sheet metal selection
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 stability (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: Hazards (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 |
| 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: Collisions (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: 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 (Flux)
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. Shear force
*Note: On a vertical wall, the magnet retains just ~20% of its nominal pull.
2. Plate thickness effect
*Thin steel (e.g. computer case) significantly weakens the holding force.
3. Power loss vs temp
*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) = 0.45
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 |
Other products
Pros and cons of rare earth magnets.
Strengths
- Their magnetic field is durable, and after around ten years it drops only by ~1% (theoretically),
- Neodymium magnets are distinguished by extremely resistant to loss of magnetic properties caused by magnetic disturbances,
- The use of an metallic coating of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
- The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
- Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures reaching 230°C and above...
- Thanks to modularity in constructing and the capacity to customize to individual projects,
- Wide application in high-tech industry – they are utilized in mass storage devices, drive modules, advanced medical instruments, and technologically advanced constructions.
- Thanks to concentrated force, small magnets offer high operating force, in miniature format,
Disadvantages
- At very strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
- We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- Magnets exposed to a humid environment can rust. Therefore when using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
- We recommend a housing - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complicated forms.
- Health risk to health – tiny shards of magnets can be dangerous, if swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, small components of these magnets are able to complicate diagnosis medical in case of swallowing.
- Due to complex production process, their price is relatively high,
Pull force analysis
Maximum magnetic pulling force – what contributes to it?
- using a sheet made of high-permeability steel, serving as a ideal flux conductor
- possessing a thickness of min. 10 mm to ensure full flux closure
- characterized by lack of roughness
- with zero gap (no coatings)
- during detachment in a direction vertical to the plane
- at ambient temperature approx. 20 degrees Celsius
Lifting capacity in real conditions – factors
- Clearance – the presence of foreign body (rust, tape, gap) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
- Pull-off angle – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the maximum value.
- Plate thickness – insufficiently thick plate does not accept the full field, causing part of the power to be lost to the other side.
- Material composition – not every steel reacts the same. High carbon content worsen the interaction with the magnet.
- Surface finish – ideal contact is obtained only on polished steel. Rough texture create air cushions, weakening the magnet.
- Heat – NdFeB sinters 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 performed on a smooth plate of optimal thickness, under perpendicular forces, however under shearing force the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet’s surface and the plate reduces the lifting capacity.
Warnings
Hand protection
Watch your fingers. Two large magnets will snap together immediately with a force of several hundred kilograms, crushing anything in their path. Be careful!
No play value
Strictly keep magnets away from children. Choking hazard is significant, and the effects of magnets clamping inside the body are fatal.
Magnets are brittle
Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Avoid impacts, as the magnet may shatter into hazardous fragments.
Impact on smartphones
Note: rare earth magnets produce a field that disrupts precision electronics. Maintain a safe distance from your phone, tablet, and navigation systems.
Life threat
For implant holders: Strong magnetic fields affect medical devices. Maintain at least 30 cm distance or request help to work with the magnets.
Demagnetization risk
Do not overheat. NdFeB magnets are susceptible to heat. If you need resistance above 80°C, look for HT versions (H, SH, UH).
Machining danger
Powder generated during cutting of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.
Handling guide
Handle magnets with awareness. Their immense force can surprise even experienced users. Be vigilant and respect their power.
Data carriers
Powerful magnetic fields can erase data on payment cards, HDDs, and other magnetic media. Maintain a gap of min. 10 cm.
Sensitization to coating
Nickel alert: The nickel-copper-nickel coating consists of nickel. If redness happens, cease working with magnets and use protective gear.
