MW 3x2 zestaw 200 szt. / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010540
GTIN/EAN: 5906301815310
- Diameter Ø
- 3 mm [±0,1 mm]
- Height
- 2 mm [±0,1 mm]
- Weight
- 22 g
- Magnetization Direction
- ↑ axial
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
30.07 zł net / pcs
36.99 zł with VAT (23% VAT) / pcs
bulk discounts:
Need more?Frequently asked questions
Where can I buy strong cylindrical neodymium magnets?
Can a small cylindrical magnet provide a strong grip for precise workshop work?
Which cylindrical magnet can work at a higher temperature?
Engineering report for this magnet
Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.
Call us now
+48 888 99 98 98
alternatively let us know using
contact form
the contact section.
Specifications and structure of a neodymium magnet can be estimated using our
power calculator.
Order by 14:00 and we’ll ship today!
Technical data of the product - MW 3x2 zestaw 200 szt. / N38 - cylindrical magnet
Specification / characteristics - MW 3x2 zestaw 200 szt. / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010540 |
| GTIN/EAN | 5906301815310 |
| Distributor | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 3 mm [±0,1 mm] |
| Height | 2 mm [±0,1 mm] |
| Weight | 22 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.30 kg / 2.99 N |
| Magnetic Induction ~ ? | 493.99 mT / 4940 Gs |
| Coating | [NiCuNi] Nickel |
| Manufacturing Tolerance | ±0.1 mm |
Magnetic properties of material N38
| properties | values | units |
|---|---|---|
| Remanence Br ? | 12.2-12.6 | kGs |
| Remanence Br ? | 1220-1260 | mT |
| Coercivity bHc ? | 10.8-11.5 | kOe |
| Coercivity bHc ? | 860-915 | kA/m |
| Intrinsic coercivity iHc | ≥ 12 | kOe |
| Intrinsic coercivity iHc | ≥ 955 | kA/m |
| Energy product BHmax ? | 36-38 | BH max MGOe |
| Energy product BHmax ? | 287-303 | BH max KJ/m |
| Maximum working 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 | 310 | °C |
| Curie Temperature TF | 590 | °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 analysis of the product - report
Presented information constitute the direct effect of a mathematical analysis. Values rely on models for the material Nd2Fe14B. Operational conditions might slightly deviate from the simulation results. Use these data as a reference point when designing systems.
Table 1: Static force (pull vs distance) - power drop
MW 3x2 zestaw 200 szt. / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4928 Gs
492.8 mT
|
0.30 kg / 0.66 LBS
300.0 g / 2.9 N
|
safe |
| 1 mm |
2106 Gs
210.6 mT
|
0.05 kg / 0.12 LBS
54.8 g / 0.5 N
|
safe |
| 2 mm |
845 Gs
84.5 mT
|
0.01 kg / 0.02 LBS
8.8 g / 0.1 N
|
safe |
| 3 mm |
393 Gs
39.3 mT
|
0.00 kg / 0.00 LBS
1.9 g / 0.0 N
|
safe |
| 5 mm |
124 Gs
12.4 mT
|
0.00 kg / 0.00 LBS
0.2 g / 0.0 N
|
safe |
| 10 mm |
21 Gs
2.1 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
| 15 mm |
7 Gs
0.7 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
| 20 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
| 30 mm |
1 Gs
0.1 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
| 50 mm |
0 Gs
0.0 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
Table 2: Sliding hold (wall)
MW 3x2 zestaw 200 szt. / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Raw steel (µ ≈ 0.2) |
0.06 kg / 0.13 LBS
60.0 g / 0.6 N
|
| 1 mm | Raw steel (µ ≈ 0.2) |
0.01 kg / 0.02 LBS
10.0 g / 0.1 N
|
| 2 mm | Raw steel (µ ≈ 0.2) |
0.00 kg / 0.00 LBS
2.0 g / 0.0 N
|
| 3 mm | Raw steel (µ ≈ 0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 5 mm | Raw steel (µ ≈ 0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 10 mm | Raw steel (µ ≈ 0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 15 mm | Raw steel (µ ≈ 0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 20 mm | Raw steel (µ ≈ 0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 30 mm | Raw steel (µ ≈ 0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 50 mm | Raw steel (µ ≈ 0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
Table 3: Vertical assembly (sliding) - vertical pull
MW 3x2 zestaw 200 szt. / N38
| Surface type | Friction coefficient / % | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% of nominal force
|
0.09 kg / 0.20 LBS
90.0 g / 0.9 N
|
| Painted steel (standard) |
µ = 0.2
20% of nominal force
|
0.06 kg / 0.13 LBS
60.0 g / 0.6 N
|
| Oily/slippery steel |
µ = 0.1
10% of nominal force
|
0.03 kg / 0.07 LBS
30.0 g / 0.3 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% of nominal force
|
0.15 kg / 0.33 LBS
150.0 g / 1.5 N
|
Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 3x2 zestaw 200 szt. / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.03 kg / 0.07 LBS
30.0 g / 0.3 N
|
| 1 mm |
|
0.08 kg / 0.17 LBS
75.0 g / 0.7 N
|
| 2 mm |
|
0.15 kg / 0.33 LBS
150.0 g / 1.5 N
|
| 3 mm |
|
0.22 kg / 0.50 LBS
225.0 g / 2.2 N
|
| 5 mm |
|
0.30 kg / 0.66 LBS
300.0 g / 2.9 N
|
| 10 mm |
|
0.30 kg / 0.66 LBS
300.0 g / 2.9 N
|
| 11 mm |
|
0.30 kg / 0.66 LBS
300.0 g / 2.9 N
|
| 12 mm |
|
0.30 kg / 0.66 LBS
300.0 g / 2.9 N
|
Table 5: Thermal resistance (stability) - resistance threshold
MW 3x2 zestaw 200 szt. / N38
| Magnet temperature (°C) | Force change relative to 20°C | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.30 kg / 0.66 LBS
300.0 g / 2.9 N
|
Estimate |
| 40 °C | -4.4% |
0.29 kg / 0.63 LBS
286.9 g / 2.8 N
|
Estimate |
| 60 °C | -8.6% |
0.27 kg / 0.60 LBS
274.2 g / 2.7 N
|
Estimate |
| 80 °C | -12.8% |
0.26 kg / 0.58 LBS
261.7 g / 2.6 N
|
Material limit |
| 100 °C | — | — | Out of range — no model |
Table 6: Two magnets (attraction) - field range
MW 3x2 zestaw 200 szt. / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
1.06 kg / 2.33 LBS
5 766 Gs
|
0.16 kg / 0.35 LBS
159 g / 1.6 N
|
N/A |
| 1 mm |
0.49 kg / 1.08 LBS
6 712 Gs
|
0.07 kg / 0.16 LBS
74 g / 0.7 N
|
0.44 kg / 0.97 LBS
~0 Gs
|
| 2 mm |
0.19 kg / 0.43 LBS
4 213 Gs
|
0.03 kg / 0.06 LBS
29 g / 0.3 N
|
0.17 kg / 0.38 LBS
~0 Gs
|
| 3 mm |
0.08 kg / 0.17 LBS
2 629 Gs
|
0.01 kg / 0.02 LBS
11 g / 0.1 N
|
0.07 kg / 0.15 LBS
~0 Gs
|
| 5 mm |
0.01 kg / 0.03 LBS
1 131 Gs
|
0.00 kg / 0.00 LBS
2 g / 0.0 N
|
0.01 kg / 0.03 LBS
~0 Gs
|
| 10 mm |
0.00 kg / 0.00 LBS
248 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 LBS
41 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 LBS
3 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 LBS
2 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 LBS
1 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 LBS
1 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 90 mm |
0.00 kg / 0.00 LBS
1 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 100 mm |
0.00 kg / 0.00 LBS
0 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Axial field levels — not safety zones
MW 3x2 zestaw 200 szt. / N38
| Field level (Gs) | mT | Model distance (cm) |
|---|---|---|
| < 5 Gs | < 0.5 mT | 2.0 cm |
| < 10 Gs | < 1.0 mT | 1.5 cm |
| < 20 Gs | < 2.0 mT | 1.5 cm |
| < 40 Gs | < 4.0 mT | 1.0 cm |
| < 50 Gs | < 5.0 mT | 1.0 cm |
| < 400 Gs | < 40.0 mT | 0.5 cm |
| < 600 Gs | < 60.0 mT | 0.5 cm |
Table 8: Dynamics (kinetic energy) - collision effects
MW 3x2 zestaw 200 szt. / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
1.46 km/h
(0.40 m/s)
|
0.00 J | |
| 30 mm |
1.46 km/h
(0.40 m/s)
|
0.00 J | |
| 50 mm |
1.46 km/h
(0.40 m/s)
|
0.00 J | |
| 100 mm |
1.46 km/h
(0.40 m/s)
|
0.00 J |
Table 9: Surface protection spec
MW 3x2 zestaw 200 szt. / 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 3x2 zestaw 200 szt. / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 353 Mx | 3.5 µWb |
| Pc Coefficient | 0.71 | High (Stable) |
Table 11: Submerged application
MW 3x2 zestaw 200 szt. / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.30 kg | Standard |
| Water (riverbed) |
0.34 kg
(+0.04 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Note: On a vertical wall, the magnet holds only a fraction of its max power.
2. Steel thickness impact
*Thin steel (e.g. 0.5mm PC case) severely weakens the holding force.
3. Heat tolerance
N38: the maximum material working temperature is 80°C. Permitted conditions also depend on the shape and magnetic circuit.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.71
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.
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 products
Pros and cons of rare earth magnets.
Advantages
- They do not lose strength, even during around ten years – the decrease in power is only ~1% (theoretically),
- They are resistant to demagnetization induced by external disturbances,
- In other words, due to the glossy finish of silver, the element looks attractive,
- They show high magnetic induction at the operating surface, making them more effective,
- Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for functioning at temperatures reaching 230°C and above...
- Possibility of precise machining and modifying to atypical needs,
- Versatile presence in innovative solutions – they are utilized in hard drives, electric motors, precision medical tools, as well as complex engineering applications.
- Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,
Cons
- Brittleness is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a strong case, which not only secures them against impacts but also raises their durability
- Do not exceed this material temperature limit: 80°C. Overheating may permanently weaken the magnet.
- They rust in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
- We suggest cover - magnetic mount, due to difficulties in realizing threads inside the magnet and complicated shapes.
- Health risk related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child health protection. Additionally, small elements of these magnets are able to disrupt the diagnostic process medical in case of swallowing.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Pull force analysis
Highest magnetic holding force – what affects it?
- with the contact of a sheet made of low-carbon steel, guaranteeing maximum field concentration
- whose thickness reaches at least 10 mm
- characterized by even structure
- without the slightest insulating layer between the magnet and steel
- under perpendicular force direction (90-degree angle)
- in temp. approx. 20°C
What influences lifting capacity in practice
- Distance – the presence of foreign body (rust, tape, gap) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
- Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the maximum value.
- Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
- Material type – the best choice is high-permeability steel. Cast iron may have worse magnetic properties.
- Surface condition – ground elements guarantee perfect abutment, which increases field saturation. Rough surfaces weaken the grip.
- Thermal factor – high temperature reduces pulling force. Exceeding the limit temperature can permanently damage the magnet.
Lifting capacity testing was conducted on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under parallel forces the load capacity is reduced by as much as 5 times. Additionally, even a small distance between the magnet’s surface and the plate lowers the load capacity.
Precautions when working with NdFeB magnets
Swallowing risk
Always keep magnets away from children. Choking hazard is high, and the effects of magnets clamping inside the body are very dangerous.
Keep away from computers
Avoid bringing magnets near a wallet, laptop, or screen. The magnetic field can irreversibly ruin these devices and erase data from cards.
Machining danger
Mechanical processing of NdFeB material poses a fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.
Immense force
Be careful. Neodymium magnets act from a long distance and connect with huge force, often faster than you can move away.
Beware of splinters
NdFeB magnets are sintered ceramics, which means they are very brittle. Impact of two magnets will cause them breaking into shards.
Life threat
For implant holders: Strong magnetic fields affect electronics. Keep at least 30 cm distance or request help to work with the magnets.
Permanent damage
Do not exceed the maximum operating temperature stated in the specifications of the particular product. The limit depends on the material, geometry and operating arrangement; there is no single threshold for all neodymium magnets. Overheating can permanently weaken a magnet.
Nickel allergy
A percentage of the population experience a contact allergy to nickel, which is the typical protective layer for neodymium magnets. Frequent touching might lead to an allergic reaction. We strongly advise wear safety gloves.
Keep away from electronics
Note: rare earth magnets generate a field that interferes with sensitive sensors. Keep a safe distance from your mobile, device, and GPS.
Bone fractures
Risk of injury: The pulling power is so great that it can cause blood blisters, crushing, and even bone fractures. Protective gloves are recommended.
