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 details - 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 |
Technical simulation of the assembly - report
The following information are the outcome of a mathematical calculation. Results rely on algorithms for the class Nd2Fe14B. Real-world conditions might slightly differ from theoretical values. Use these calculations as a reference point when designing systems.
Table 1: Static pull force (force vs gap) - characteristics
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
|
dangerous! |
| 1 mm |
3321 Gs
332.1 mT
|
18.55 kg / 40.89 lbs
18548.8 g / 182.0 N
|
dangerous! |
| 2 mm |
3106 Gs
310.6 mT
|
16.23 kg / 35.77 lbs
16226.1 g / 159.2 N
|
dangerous! |
| 3 mm |
2883 Gs
288.3 mT
|
13.98 kg / 30.82 lbs
13978.2 g / 137.1 N
|
dangerous! |
| 5 mm |
2437 Gs
243.7 mT
|
9.99 kg / 22.02 lbs
9987.1 g / 98.0 N
|
medium risk |
| 10 mm |
1500 Gs
150.0 mT
|
3.78 kg / 8.34 lbs
3783.1 g / 37.1 N
|
medium risk |
| 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: Sliding force (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 (shearing) - 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: Material efficiency (substrate influence) - sheet metal selection
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 (material behavior) - 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 (attraction) - forces in the system
MW 29x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding 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: Safety (HSE) (electronics) - 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 |
| 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: Collisions (cracking risk) - collision effects
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: Construction 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. Wall mount (shear)
*Warning: On a vertical surface, the magnet holds just approx. 20-30% of its max power.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) drastically reduces the holding force.
3. Power loss vs temp
*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.
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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other offers
Strengths and weaknesses of neodymium magnets.
Advantages
- They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
- They have excellent resistance to magnetic field loss when exposed to opposing magnetic fields,
- The use of an metallic layer of noble metals (nickel, gold, silver) causes the element to look better,
- Neodymium magnets generate maximum magnetic induction on a small surface, which increases force concentration,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
- Possibility of precise shaping and adapting to precise requirements,
- Universal use in high-tech industry – they are used in magnetic memories, motor assemblies, precision medical tools, as well as multitasking production systems.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Disadvantages
- To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
- We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
- Due to limitations in creating threads and complex forms in magnets, we propose using casing - magnetic mount.
- Health risk related to microscopic parts of magnets are risky, in case of ingestion, which is particularly important in the context of child safety. Additionally, tiny parts of these magnets are able to be problematic in diagnostics medical after entering the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Holding force characteristics
Highest magnetic holding force – what affects it?
- on a plate made of structural steel, optimally conducting the magnetic flux
- possessing a massiveness of at least 10 mm to ensure full flux closure
- characterized by lack of roughness
- with total lack of distance (without coatings)
- for force applied at a right angle (pull-off, not shear)
- in neutral thermal conditions
Practical lifting capacity: influencing factors
- Distance (between the magnet and the plate), since even a very small distance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to paint, corrosion or debris).
- Force direction – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
- Substrate thickness – for full efficiency, 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 weaken the interaction with the magnet.
- Surface finish – full contact is obtained only on polished steel. Any scratches and bumps create air cushions, reducing force.
- Thermal factor – high temperature reduces magnetic field. Too high temperature can permanently damage the magnet.
Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the holding force is lower. Additionally, even a minimal clearance between the magnet’s surface and the plate lowers the lifting capacity.
Warnings
Magnetic media
Data protection: Neodymium magnets can damage data carriers and delicate electronics (pacemakers, medical aids, timepieces).
Warning for heart patients
Medical warning: Neodymium magnets can deactivate heart devices and defibrillators. Do not approach if you have electronic implants.
Crushing risk
Big blocks can smash fingers in a fraction of a second. Do not put your hand between two attracting surfaces.
Danger to the youngest
Neodymium magnets are not suitable for play. Swallowing a few magnets can lead to them connecting inside the digestive tract, which poses a severe health hazard and requires urgent medical intervention.
Skin irritation risks
It is widely known that nickel (the usual finish) is a strong allergen. If you have an allergy, prevent direct skin contact and select encased magnets.
Magnet fragility
Despite metallic appearance, the material is delicate and cannot withstand shocks. Avoid impacts, as the magnet may shatter into hazardous fragments.
GPS Danger
A powerful magnetic field interferes with the functioning of compasses in smartphones and navigation systems. Maintain magnets near a device to avoid damaging the sensors.
Permanent damage
Standard neodymium magnets (N-type) undergo demagnetization when the temperature exceeds 80°C. The loss of strength is permanent.
Dust explosion hazard
Combustion risk: Rare earth powder is explosive. Avoid machining magnets without safety gear as this may cause fire.
Handling rules
Before starting, read the rules. Sudden snapping can destroy the magnet or hurt your hand. Think ahead.
