MW 29.9x10 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010052
GTIN/EAN: 5906301810513
Diameter Ø
29.9 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
52.66 g
Magnetization Direction
→ diametrical
Load capacity
21.50 kg / 210.90 N
Magnetic Induction
344.60 mT / 3446 Gs
Coating
[NiCuNi] Nickel
24.60 ZŁ with VAT / pcs + price for transport
20.00 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Call us now
+48 22 499 98 98
otherwise send us a note via
inquiry form
through our site.
Lifting power and appearance of a neodymium magnet can be estimated with our
power calculator.
Order by 14:00 and we’ll ship today!
Technical of the product - MW 29.9x10 / N38 - cylindrical magnet
Specification / characteristics - MW 29.9x10 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010052 |
| GTIN/EAN | 5906301810513 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 29.9 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 52.66 g |
| Magnetization Direction | → diametrical |
| Load capacity ~ ? | 21.50 kg / 210.90 N |
| Magnetic Induction ~ ? | 344.60 mT / 3446 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 analysis of the magnet - technical parameters
Presented values are the direct effect of a mathematical simulation. Values are based on models for the class Nd2Fe14B. Operational performance might slightly differ. Treat these calculations as a reference point during assembly planning.
Table 1: Static pull force (force vs distance) - power drop
MW 29.9x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3445 Gs
344.5 mT
|
21.50 kg / 47.40 lbs
21500.0 g / 210.9 N
|
crushing |
| 1 mm |
3261 Gs
326.1 mT
|
19.26 kg / 42.45 lbs
19256.6 g / 188.9 N
|
crushing |
| 2 mm |
3059 Gs
305.9 mT
|
16.95 kg / 37.36 lbs
16947.4 g / 166.3 N
|
crushing |
| 3 mm |
2848 Gs
284.8 mT
|
14.70 kg / 32.40 lbs
14696.2 g / 144.2 N
|
crushing |
| 5 mm |
2425 Gs
242.5 mT
|
10.65 kg / 23.48 lbs
10650.1 g / 104.5 N
|
crushing |
| 10 mm |
1519 Gs
151.9 mT
|
4.18 kg / 9.21 lbs
4178.4 g / 41.0 N
|
medium risk |
| 15 mm |
930 Gs
93.0 mT
|
1.57 kg / 3.45 lbs
1565.8 g / 15.4 N
|
safe |
| 20 mm |
583 Gs
58.3 mT
|
0.62 kg / 1.36 lbs
616.0 g / 6.0 N
|
safe |
| 30 mm |
258 Gs
25.8 mT
|
0.12 kg / 0.27 lbs
121.0 g / 1.2 N
|
safe |
| 50 mm |
76 Gs
7.6 mT
|
0.01 kg / 0.02 lbs
10.4 g / 0.1 N
|
safe |
Table 2: Sliding hold (vertical surface)
MW 29.9x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
4.30 kg / 9.48 lbs
4300.0 g / 42.2 N
|
| 1 mm | Stal (~0.2) |
3.85 kg / 8.49 lbs
3852.0 g / 37.8 N
|
| 2 mm | Stal (~0.2) |
3.39 kg / 7.47 lbs
3390.0 g / 33.3 N
|
| 3 mm | Stal (~0.2) |
2.94 kg / 6.48 lbs
2940.0 g / 28.8 N
|
| 5 mm | Stal (~0.2) |
2.13 kg / 4.70 lbs
2130.0 g / 20.9 N
|
| 10 mm | Stal (~0.2) |
0.84 kg / 1.84 lbs
836.0 g / 8.2 N
|
| 15 mm | Stal (~0.2) |
0.31 kg / 0.69 lbs
314.0 g / 3.1 N
|
| 20 mm | Stal (~0.2) |
0.12 kg / 0.27 lbs
124.0 g / 1.2 N
|
| 30 mm | Stal (~0.2) |
0.02 kg / 0.05 lbs
24.0 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) - behavior on slippery surfaces
MW 29.9x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
6.45 kg / 14.22 lbs
6450.0 g / 63.3 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
4.30 kg / 9.48 lbs
4300.0 g / 42.2 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
2.15 kg / 4.74 lbs
2150.0 g / 21.1 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
10.75 kg / 23.70 lbs
10750.0 g / 105.5 N
|
Table 4: Steel thickness (saturation) - sheet metal selection
MW 29.9x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
1.08 kg / 2.37 lbs
1075.0 g / 10.5 N
|
| 1 mm |
|
2.69 kg / 5.92 lbs
2687.5 g / 26.4 N
|
| 2 mm |
|
5.38 kg / 11.85 lbs
5375.0 g / 52.7 N
|
| 3 mm |
|
8.06 kg / 17.77 lbs
8062.5 g / 79.1 N
|
| 5 mm |
|
13.44 kg / 29.62 lbs
13437.5 g / 131.8 N
|
| 10 mm |
|
21.50 kg / 47.40 lbs
21500.0 g / 210.9 N
|
| 11 mm |
|
21.50 kg / 47.40 lbs
21500.0 g / 210.9 N
|
| 12 mm |
|
21.50 kg / 47.40 lbs
21500.0 g / 210.9 N
|
Table 5: Thermal stability (material behavior) - resistance threshold
MW 29.9x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
21.50 kg / 47.40 lbs
21500.0 g / 210.9 N
|
OK |
| 40 °C | -2.2% |
21.03 kg / 46.36 lbs
21027.0 g / 206.3 N
|
OK |
| 60 °C | -4.4% |
20.55 kg / 45.31 lbs
20554.0 g / 201.6 N
|
|
| 80 °C | -6.6% |
20.08 kg / 44.27 lbs
20081.0 g / 197.0 N
|
|
| 100 °C | -28.8% |
15.31 kg / 33.75 lbs
15308.0 g / 150.2 N
|
Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 29.9x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
51.38 kg / 113.28 lbs
4 963 Gs
|
7.71 kg / 16.99 lbs
7708 g / 75.6 N
|
N/A |
| 1 mm |
48.76 kg / 107.50 lbs
6 712 Gs
|
7.31 kg / 16.12 lbs
7314 g / 71.7 N
|
43.88 kg / 96.75 lbs
~0 Gs
|
| 2 mm |
46.02 kg / 101.46 lbs
6 521 Gs
|
6.90 kg / 15.22 lbs
6903 g / 67.7 N
|
41.42 kg / 91.32 lbs
~0 Gs
|
| 3 mm |
43.26 kg / 95.37 lbs
6 322 Gs
|
6.49 kg / 14.31 lbs
6489 g / 63.7 N
|
38.93 kg / 85.83 lbs
~0 Gs
|
| 5 mm |
37.78 kg / 83.30 lbs
5 909 Gs
|
5.67 kg / 12.49 lbs
5667 g / 55.6 N
|
34.00 kg / 74.97 lbs
~0 Gs
|
| 10 mm |
25.45 kg / 56.11 lbs
4 850 Gs
|
3.82 kg / 8.42 lbs
3818 g / 37.5 N
|
22.91 kg / 50.50 lbs
~0 Gs
|
| 20 mm |
9.99 kg / 22.02 lbs
3 038 Gs
|
1.50 kg / 3.30 lbs
1498 g / 14.7 N
|
8.99 kg / 19.81 lbs
~0 Gs
|
| 50 mm |
0.63 kg / 1.38 lbs
761 Gs
|
0.09 kg / 0.21 lbs
94 g / 0.9 N
|
0.56 kg / 1.24 lbs
~0 Gs
|
| 60 mm |
0.29 kg / 0.64 lbs
517 Gs
|
0.04 kg / 0.10 lbs
43 g / 0.4 N
|
0.26 kg / 0.57 lbs
~0 Gs
|
| 70 mm |
0.14 kg / 0.32 lbs
364 Gs
|
0.02 kg / 0.05 lbs
22 g / 0.2 N
|
0.13 kg / 0.28 lbs
~0 Gs
|
| 80 mm |
0.08 kg / 0.17 lbs
265 Gs
|
0.01 kg / 0.03 lbs
11 g / 0.1 N
|
0.07 kg / 0.15 lbs
~0 Gs
|
| 90 mm |
0.04 kg / 0.09 lbs
198 Gs
|
0.01 kg / 0.01 lbs
6 g / 0.1 N
|
0.04 kg / 0.08 lbs
~0 Gs
|
| 100 mm |
0.02 kg / 0.05 lbs
152 Gs
|
0.00 kg / 0.01 lbs
4 g / 0.0 N
|
0.02 kg / 0.05 lbs
~0 Gs
|
Table 7: Safety (HSE) (electronics) - warnings
MW 29.9x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 13.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 11.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 8.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 6.5 cm |
| Remote | 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: Impact energy (kinetic energy) - warning
MW 29.9x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
22.72 km/h
(6.31 m/s)
|
1.05 J | |
| 30 mm |
35.42 km/h
(9.84 m/s)
|
2.55 J | |
| 50 mm |
45.58 km/h
(12.66 m/s)
|
4.22 J | |
| 100 mm |
64.44 km/h
(17.90 m/s)
|
8.44 J |
Table 9: Coating parameters (durability)
MW 29.9x10 / 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 29.9x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 25 588 Mx | 255.9 µWb |
| Pc Coefficient | 0.44 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
MW 29.9x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 21.50 kg | Standard |
| Water (riverbed) |
24.62 kg
(+3.12 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Warning: On a vertical wall, the magnet holds merely ~20% of its perpendicular strength.
2. Steel thickness impact
*Thin steel (e.g. computer case) significantly limits the holding force.
3. Thermal stability
*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) = 0.44
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.
Material specification
| 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 |
View more deals
Advantages and disadvantages of Nd2Fe14B magnets.
Strengths
- They have stable power, and over around 10 years their attraction force decreases symbolically – ~1% (according to theory),
- They have excellent resistance to magnetism drop as a result of opposing magnetic fields,
- The use of an shiny layer of noble metals (nickel, gold, silver) causes the element to present itself better,
- They feature high magnetic induction at the operating surface, making them more effective,
- Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for functioning at temperatures approaching 230°C and above...
- Possibility of precise machining and optimizing to precise needs,
- Key role in advanced technology sectors – they are used in magnetic memories, electric motors, diagnostic systems, and modern systems.
- Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,
Disadvantages
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
- When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
- We recommend casing - magnetic mount, due to difficulties in creating nuts inside the magnet and complicated forms.
- Potential hazard related to microscopic parts of magnets are risky, if swallowed, which becomes key in the context of child safety. Furthermore, small elements of these devices can complicate diagnosis medical in case of swallowing.
- With budget limitations the cost of neodymium magnets is a challenge,
Holding force characteristics
Optimal lifting capacity of a neodymium magnet – what contributes to it?
- with the use of a yoke made of special test steel, guaranteeing full magnetic saturation
- possessing a massiveness of min. 10 mm to ensure full flux closure
- characterized by smoothness
- with direct contact (without coatings)
- under perpendicular force vector (90-degree angle)
- at temperature approx. 20 degrees Celsius
Determinants of practical lifting force of a magnet
- Gap between magnet and steel – every millimeter of distance (caused e.g. by varnish or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
- Force direction – catalog parameter refers to detachment vertically. When slipping, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
- Metal thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
- Material type – the best choice is pure iron steel. Cast iron may attract less.
- Surface condition – ground elements guarantee perfect abutment, which increases force. Uneven metal reduce efficiency.
- Thermal factor – hot environment weakens pulling force. Too high temperature can permanently damage the magnet.
Lifting capacity was measured using a polished steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, however under shearing force the load capacity is reduced by as much as fivefold. Additionally, even a slight gap between the magnet and the plate reduces the load capacity.
Safety rules for work with neodymium magnets
Allergy Warning
Studies show that nickel (standard magnet coating) is a strong allergen. If you have an allergy, prevent touching magnets with bare hands or opt for versions in plastic housing.
Conscious usage
Before use, read the rules. Uncontrolled attraction can break the magnet or injure your hand. Think ahead.
Keep away from children
Strictly keep magnets away from children. Ingestion danger is high, and the consequences of magnets connecting inside the body are fatal.
Health Danger
Individuals with a pacemaker have to maintain an safe separation from magnets. The magnetic field can stop the functioning of the implant.
Magnets are brittle
Despite the nickel coating, the material is delicate and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.
Bone fractures
Large magnets can break fingers instantly. Never place your hand betwixt two strong magnets.
Keep away from computers
Do not bring magnets near a wallet, computer, or screen. The magnetism can irreversibly ruin these devices and erase data from cards.
Thermal limits
Keep cool. Neodymium magnets are sensitive to heat. If you need resistance above 80°C, ask us about special high-temperature series (H, SH, UH).
Do not drill into magnets
Mechanical processing of NdFeB material carries a risk of fire risk. Neodymium dust reacts violently with oxygen and is hard to extinguish.
Magnetic interference
A strong magnetic field disrupts the functioning of compasses in phones and GPS navigation. Maintain magnets near a device to prevent breaking the sensors.
