MW 9.5x1 zestaw 4000 szt. / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010557
GTIN/EAN: 5906301815495
- Diameter Ø
- 9.5 mm [±0,1 mm]
- Height
- 1 mm [±0,1 mm]
- Weight
- 2120 g
- Magnetization Direction
- ↑ axial
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
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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.
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Technical parameters - MW 9.5x1 zestaw 4000 szt. / N38 - cylindrical magnet
Specification / characteristics - MW 9.5x1 zestaw 4000 szt. / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010557 |
| GTIN/EAN | 5906301815495 |
| Distributor | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 9.5 mm [±0,1 mm] |
| Height | 1 mm [±0,1 mm] |
| Weight | 2120 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.40 kg / 3.96 N |
| Magnetic Induction ~ ? | 127.68 mT / 1277 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 |
Physical modeling of the assembly - report
These information represent the direct effect of a engineering analysis. Results were calculated on models for the class Nd2Fe14B. Actual parameters might slightly differ. Please consider these data as a preliminary roadmap for designers.
Table 1: Static pull force (force vs distance) - power drop
MW 9.5x1 zestaw 4000 szt. / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
1276 Gs
127.6 mT
|
0.40 kg / 0.88 pounds
400.0 g / 3.9 N
|
weak grip |
| 1 mm |
1129 Gs
112.9 mT
|
0.31 kg / 0.69 pounds
312.8 g / 3.1 N
|
weak grip |
| 2 mm |
905 Gs
90.5 mT
|
0.20 kg / 0.44 pounds
201.0 g / 2.0 N
|
weak grip |
| 3 mm |
683 Gs
68.3 mT
|
0.11 kg / 0.25 pounds
114.5 g / 1.1 N
|
weak grip |
| 5 mm |
366 Gs
36.6 mT
|
0.03 kg / 0.07 pounds
32.9 g / 0.3 N
|
weak grip |
| 10 mm |
92 Gs
9.2 mT
|
0.00 kg / 0.00 pounds
2.1 g / 0.0 N
|
weak grip |
| 15 mm |
33 Gs
3.3 mT
|
0.00 kg / 0.00 pounds
0.3 g / 0.0 N
|
weak grip |
| 20 mm |
15 Gs
1.5 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
weak grip |
| 30 mm |
5 Gs
0.5 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
| 50 mm |
1 Gs
0.1 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
Table 2: Slippage hold (vertical surface)
MW 9.5x1 zestaw 4000 szt. / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Raw steel (µ ≈ 0.2) |
0.08 kg / 0.18 pounds
80.0 g / 0.8 N
|
| 1 mm | Raw steel (µ ≈ 0.2) |
0.06 kg / 0.14 pounds
62.0 g / 0.6 N
|
| 2 mm | Raw steel (µ ≈ 0.2) |
0.04 kg / 0.09 pounds
40.0 g / 0.4 N
|
| 3 mm | Raw steel (µ ≈ 0.2) |
0.02 kg / 0.05 pounds
22.0 g / 0.2 N
|
| 5 mm | Raw steel (µ ≈ 0.2) |
0.01 kg / 0.01 pounds
6.0 g / 0.1 N
|
| 10 mm | Raw steel (µ ≈ 0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 15 mm | Raw steel (µ ≈ 0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 20 mm | Raw steel (µ ≈ 0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 30 mm | Raw steel (µ ≈ 0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 50 mm | Raw steel (µ ≈ 0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
Table 3: Wall mounting (sliding) - vertical pull
MW 9.5x1 zestaw 4000 szt. / N38
| Surface type | Friction coefficient / % | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% of nominal force
|
0.12 kg / 0.26 pounds
120.0 g / 1.2 N
|
| Painted steel (standard) |
µ = 0.2
20% of nominal force
|
0.08 kg / 0.18 pounds
80.0 g / 0.8 N
|
| Oily/slippery steel |
µ = 0.1
10% of nominal force
|
0.04 kg / 0.09 pounds
40.0 g / 0.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% of nominal force
|
0.20 kg / 0.44 pounds
200.0 g / 2.0 N
|
Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 9.5x1 zestaw 4000 szt. / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.04 kg / 0.09 pounds
40.0 g / 0.4 N
|
| 1 mm |
|
0.10 kg / 0.22 pounds
100.0 g / 1.0 N
|
| 2 mm |
|
0.20 kg / 0.44 pounds
200.0 g / 2.0 N
|
| 3 mm |
|
0.30 kg / 0.66 pounds
300.0 g / 2.9 N
|
| 5 mm |
|
0.40 kg / 0.88 pounds
400.0 g / 3.9 N
|
| 10 mm |
|
0.40 kg / 0.88 pounds
400.0 g / 3.9 N
|
| 11 mm |
|
0.40 kg / 0.88 pounds
400.0 g / 3.9 N
|
| 12 mm |
|
0.40 kg / 0.88 pounds
400.0 g / 3.9 N
|
Table 5: Thermal resistance (stability) - resistance threshold
MW 9.5x1 zestaw 4000 szt. / N38
| Magnet temperature (°C) | Force change relative to 20°C | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.40 kg / 0.88 pounds
400.0 g / 3.9 N
|
Estimate |
| 40 °C | -4.4% |
0.38 kg / 0.84 pounds
382.6 g / 3.8 N
|
Estimate |
| 60 °C | -8.6% |
0.37 kg / 0.81 pounds
365.6 g / 3.6 N
|
Estimate |
| 80 °C | -12.8% |
0.35 kg / 0.77 pounds
348.9 g / 3.4 N
|
Material limit |
| 100 °C | — | — | Out of range — no model |
Table 6: Two magnets (repulsion) - field collision
MW 9.5x1 zestaw 4000 szt. / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
0.71 kg / 1.57 pounds
2 403 Gs
|
0.11 kg / 0.24 pounds
107 g / 1.0 N
|
N/A |
| 1 mm |
0.65 kg / 1.43 pounds
2 436 Gs
|
0.10 kg / 0.21 pounds
97 g / 1.0 N
|
0.58 kg / 1.29 pounds
~0 Gs
|
| 2 mm |
0.56 kg / 1.23 pounds
2 257 Gs
|
0.08 kg / 0.18 pounds
84 g / 0.8 N
|
0.50 kg / 1.10 pounds
~0 Gs
|
| 3 mm |
0.46 kg / 1.00 pounds
2 041 Gs
|
0.07 kg / 0.15 pounds
68 g / 0.7 N
|
0.41 kg / 0.90 pounds
~0 Gs
|
| 5 mm |
0.27 kg / 0.60 pounds
1 580 Gs
|
0.04 kg / 0.09 pounds
41 g / 0.4 N
|
0.25 kg / 0.54 pounds
~0 Gs
|
| 10 mm |
0.06 kg / 0.13 pounds
732 Gs
|
0.01 kg / 0.02 pounds
9 g / 0.1 N
|
0.05 kg / 0.12 pounds
~0 Gs
|
| 20 mm |
0.00 kg / 0.01 pounds
183 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
16 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 pounds
10 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 pounds
6 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 pounds
4 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 90 mm |
0.00 kg / 0.00 pounds
3 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 100 mm |
0.00 kg / 0.00 pounds
2 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Axial field levels — not safety zones
MW 9.5x1 zestaw 4000 szt. / N38
| Field level (Gs) | mT | Model distance (cm) |
|---|---|---|
| < 5 Gs | < 0.5 mT | 3.0 cm |
| < 10 Gs | < 1.0 mT | 2.5 cm |
| < 20 Gs | < 2.0 mT | 2.0 cm |
| < 40 Gs | < 4.0 mT | 1.5 cm |
| < 50 Gs | < 5.0 mT | 1.5 cm |
| < 400 Gs | < 40.0 mT | 0.5 cm |
| < 600 Gs | < 60.0 mT | 0.5 cm |
Table 8: Impact energy (cracking risk) - warning
MW 9.5x1 zestaw 4000 szt. / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
0.34 km/h
(0.09 m/s)
|
0.01 J | |
| 30 mm |
0.34 km/h
(0.09 m/s)
|
0.01 J | |
| 50 mm |
0.34 km/h
(0.09 m/s)
|
0.01 J | |
| 100 mm |
0.34 km/h
(0.09 m/s)
|
0.01 J |
Table 9: Corrosion resistance
MW 9.5x1 zestaw 4000 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: Construction data (Pc)
MW 9.5x1 zestaw 4000 szt. / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 1 184 Mx | 11.8 µWb |
| Pc Coefficient | 0.16 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MW 9.5x1 zestaw 4000 szt. / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.40 kg | Standard |
| Water (riverbed) |
0.46 kg
(+0.06 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Note: On a vertical surface, the magnet retains just a fraction of its perpendicular strength.
2. Steel thickness impact
*Thin steel (e.g. 0.5mm PC case) drastically reduces the holding force.
3. Temperature resistance
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) = 0.16
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.
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Advantages and disadvantages of neodymium magnets.
Strengths
- They do not lose strength, even after nearly ten years – the decrease in lifting capacity is only ~1% (based on measurements),
- They possess excellent resistance to magnetism drop due to opposing magnetic fields,
- In other words, due to the shiny surface of nickel, the element becomes visually attractive,
- Magnets exhibit huge magnetic induction on the outer layer,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Possibility of custom machining as well as adapting to atypical conditions,
- Significant place in innovative solutions – they are used in hard drives, brushless drives, precision medical tools, also other advanced devices.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Weaknesses
- At very strong impacts they can crack, therefore we advise placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's 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 recommend using waterproof magnets e.g. in rubber, plastic
- We suggest cover - magnetic mount, due to difficulties in realizing nuts inside the magnet and complex forms.
- Possible danger to health – tiny shards of magnets pose a threat, if swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, small components of these products can be problematic in diagnostics medical when they are in the body.
- With large orders the cost of neodymium magnets is a challenge,
Pull force analysis
Highest magnetic holding force – what affects it?
- using a sheet made of mild steel, acting as a magnetic yoke
- whose thickness equals approx. 10 mm
- with a plane free of scratches
- without any insulating layer between the magnet and steel
- during detachment in a direction perpendicular to the mounting surface
- at room temperature
Lifting capacity in real conditions – factors
- Distance (between the magnet and the metal), because even a tiny distance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to varnish, corrosion or debris).
- Force direction – catalog parameter refers to pulling vertically. When slipping, the magnet exhibits significantly lower power (often approx. 20-30% of maximum force).
- Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
- Material composition – not every steel reacts the same. High carbon content weaken the attraction effect.
- Surface quality – the smoother and more polished the surface, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
- Heat – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and in frost gain strength (up to a certain limit).
Lifting capacity testing was carried out on a smooth plate of suitable thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the holding force is lower. Moreover, even a slight gap between the magnet’s surface and the plate lowers the load capacity.
Warnings
Keep away from computers
Do not bring magnets near a purse, computer, or screen. The magnetic field can destroy these devices and wipe information from cards.
Respect the power
Before starting, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.
Crushing force
Watch your fingers. Two large magnets will snap together immediately with a force of massive weight, destroying everything in their path. Exercise extreme caution!
Combustion hazard
Mechanical processing of NdFeB material carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.
Threat to navigation
A strong magnetic field interferes with the operation of compasses in smartphones and navigation systems. Do not bring magnets close to a smartphone to avoid damaging the sensors.
Danger to the youngest
Always keep magnets out of reach of children. Ingestion danger is significant, and the consequences of magnets connecting inside the body are very dangerous.
Medical interference
Individuals with a pacemaker have to maintain an safe separation from magnets. The magnetism can interfere with the operation of the implant.
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.
Magnets are brittle
Despite metallic appearance, the material is delicate and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.
Skin irritation risks
Nickel alert: The Ni-Cu-Ni coating consists of nickel. If skin irritation occurs, cease working with magnets and wear gloves.
