MW 5x3 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010087
GTIN/EAN: 5906301810865
- Diameter Ø
- 5 mm [±0,1 mm]
- Height
- 3 mm [±0,1 mm]
- Weight
- 0.44 g
- Magnetization Direction
- ↑ axial
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
0.230 zł net / pcs
0.283 zł with VAT (23% VAT) / pcs
bulk discounts:
Need more?Frequently asked questions
What is the maximum working temperature of a disc magnet?
What is the difference between N38, N42 and N52?
What is the dimensional tolerance?
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 of the product - MW 5x3 / N38 - cylindrical magnet
Specification / characteristics - MW 5x3 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010087 |
| GTIN/EAN | 5906301810865 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 5 mm [±0,1 mm] |
| Height | 3 mm [±0,1 mm] |
| Weight | 0.44 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.84 kg / 8.25 N |
| Magnetic Induction ~ ? | 475.16 mT / 4752 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 |
Technical simulation of the magnet - technical parameters
The following data are the outcome of a physical simulation. Values rely on algorithms for the material Nd2Fe14B. Actual parameters may differ from theoretical values. Treat these calculations as a reference point during assembly planning.
Table 1: Static pull force (pull vs distance) - power drop
MW 5x3 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4745 Gs
474.5 mT
|
0.84 kg / 1.85 lbs
840.0 g / 8.2 N
|
weak grip |
| 1 mm |
2955 Gs
295.5 mT
|
0.33 kg / 0.72 lbs
325.8 g / 3.2 N
|
weak grip |
| 2 mm |
1672 Gs
167.2 mT
|
0.10 kg / 0.23 lbs
104.4 g / 1.0 N
|
weak grip |
| 3 mm |
960 Gs
96.0 mT
|
0.03 kg / 0.08 lbs
34.4 g / 0.3 N
|
weak grip |
| 5 mm |
372 Gs
37.2 mT
|
0.01 kg / 0.01 lbs
5.2 g / 0.1 N
|
weak grip |
| 10 mm |
74 Gs
7.4 mT
|
0.00 kg / 0.00 lbs
0.2 g / 0.0 N
|
weak grip |
| 15 mm |
25 Gs
2.5 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
weak grip |
| 20 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
weak grip |
| 30 mm |
4 Gs
0.4 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
weak grip |
| 50 mm |
1 Gs
0.1 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
weak grip |
Table 2: Slippage capacity (vertical surface)
MW 5x3 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.17 kg / 0.37 lbs
168.0 g / 1.6 N
|
| 1 mm | Stal (~0.2) |
0.07 kg / 0.15 lbs
66.0 g / 0.6 N
|
| 2 mm | Stal (~0.2) |
0.02 kg / 0.04 lbs
20.0 g / 0.2 N
|
| 3 mm | Stal (~0.2) |
0.01 kg / 0.01 lbs
6.0 g / 0.1 N
|
| 5 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
2.0 g / 0.0 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
Table 3: Wall mounting (sliding) - vertical pull
MW 5x3 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.25 kg / 0.56 lbs
252.0 g / 2.5 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.17 kg / 0.37 lbs
168.0 g / 1.6 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.08 kg / 0.19 lbs
84.0 g / 0.8 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.42 kg / 0.93 lbs
420.0 g / 4.1 N
|
Table 4: Steel thickness (saturation) - sheet metal selection
MW 5x3 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.08 kg / 0.19 lbs
84.0 g / 0.8 N
|
| 1 mm |
|
0.21 kg / 0.46 lbs
210.0 g / 2.1 N
|
| 2 mm |
|
0.42 kg / 0.93 lbs
420.0 g / 4.1 N
|
| 3 mm |
|
0.63 kg / 1.39 lbs
630.0 g / 6.2 N
|
| 5 mm |
|
0.84 kg / 1.85 lbs
840.0 g / 8.2 N
|
| 10 mm |
|
0.84 kg / 1.85 lbs
840.0 g / 8.2 N
|
| 11 mm |
|
0.84 kg / 1.85 lbs
840.0 g / 8.2 N
|
| 12 mm |
|
0.84 kg / 1.85 lbs
840.0 g / 8.2 N
|
Table 5: Thermal resistance (material behavior) - resistance threshold
MW 5x3 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.84 kg / 1.85 lbs
840.0 g / 8.2 N
|
OK |
| 40 °C | -2.2% |
0.82 kg / 1.81 lbs
821.5 g / 8.1 N
|
OK |
| 60 °C | -4.4% |
0.80 kg / 1.77 lbs
803.0 g / 7.9 N
|
OK |
| 80 °C | -6.6% |
0.78 kg / 1.73 lbs
784.6 g / 7.7 N
|
|
| 100 °C | -28.8% |
0.60 kg / 1.32 lbs
598.1 g / 5.9 N
|
Table 6: Two magnets (repulsion) - field range
MW 5x3 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
2.73 kg / 6.01 lbs
5 700 Gs
|
0.41 kg / 0.90 lbs
409 g / 4.0 N
|
N/A |
| 1 mm |
1.77 kg / 3.91 lbs
7 658 Gs
|
0.27 kg / 0.59 lbs
266 g / 2.6 N
|
1.60 kg / 3.52 lbs
~0 Gs
|
| 2 mm |
1.06 kg / 2.33 lbs
5 910 Gs
|
0.16 kg / 0.35 lbs
159 g / 1.6 N
|
0.95 kg / 2.10 lbs
~0 Gs
|
| 3 mm |
0.60 kg / 1.33 lbs
4 460 Gs
|
0.09 kg / 0.20 lbs
90 g / 0.9 N
|
0.54 kg / 1.19 lbs
~0 Gs
|
| 5 mm |
0.19 kg / 0.42 lbs
2 520 Gs
|
0.03 kg / 0.06 lbs
29 g / 0.3 N
|
0.17 kg / 0.38 lbs
~0 Gs
|
| 10 mm |
0.02 kg / 0.04 lbs
745 Gs
|
0.00 kg / 0.01 lbs
3 g / 0.0 N
|
0.02 kg / 0.03 lbs
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 lbs
147 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
12 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
7 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
5 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
3 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
2 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
2 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
Table 7: Safety (HSE) (electronics) - precautionary measures
MW 5x3 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 3.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 2.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 2.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 1.5 cm |
| Remote | 50 Gs (5.0 mT) | 1.5 cm |
| Payment card | 400 Gs (40.0 mT) | 0.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 0.5 cm |
Table 8: Dynamics (kinetic energy) - collision effects
MW 5x3 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
22.23 km/h
(6.17 m/s)
|
0.01 J | |
| 30 mm |
22.24 km/h
(6.18 m/s)
|
0.01 J | |
| 50 mm |
22.24 km/h
(6.18 m/s)
|
0.01 J | |
| 100 mm |
22.24 km/h
(6.18 m/s)
|
0.01 J |
Table 9: Corrosion resistance
MW 5x3 / 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 5x3 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 942 Mx | 9.4 µWb |
| Pc Coefficient | 0.66 | High (Stable) |
Table 11: Hydrostatics and buoyancy
MW 5x3 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.84 kg | Standard |
| Water (riverbed) |
0.96 kg
(+0.12 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Caution: On a vertical wall, the magnet retains merely a fraction of its max power.
2. Plate thickness effect
*Thin steel (e.g. 0.5mm PC case) significantly reduces the holding force.
3. Temperature resistance
*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) = 0.66
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.
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% |
Ecology and recycling (GPSR)
| 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.
Advantages
- They do not lose power, even over nearly ten years – the decrease in strength is only ~1% (according to tests),
- They show high resistance to demagnetization induced by external magnetic fields,
- By using a decorative coating of nickel, the element presents an modern look,
- The surface of neodymium magnets generates a unique magnetic field – this is a distinguishing feature,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
- Possibility of individual modeling as well as optimizing to atypical needs,
- Huge importance in modern industrial fields – they are used in hard drives, electric motors, diagnostic systems, also technologically advanced constructions.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Cons
- Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a special holder, which not only secures them against impacts but also raises their durability
- When exposed to high temperature, neodymium magnets suffer a drop in force. 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
- 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
- We recommend cover - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complex forms.
- Possible danger related to microscopic parts of magnets can be dangerous, in case of ingestion, which becomes key in the aspect of protecting the youngest. Furthermore, small components of these devices are able to be problematic in diagnostics medical when they are in the body.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Holding force characteristics
Best holding force of the magnet in ideal parameters – what contributes to it?
- with the application of a yoke made of special test steel, guaranteeing full magnetic saturation
- whose thickness equals approx. 10 mm
- with an ideally smooth contact surface
- under conditions of gap-free contact (metal-to-metal)
- during detachment in a direction perpendicular to the mounting surface
- in stable room temperature
Lifting capacity in practice – influencing factors
- Space between surfaces – every millimeter of distance (caused e.g. by veneer or dirt) significantly weakens the pulling force, often by half at just 0.5 mm.
- Force direction – catalog parameter refers to detachment vertically. When applying parallel force, the magnet exhibits much less (often approx. 20-30% of nominal force).
- Steel thickness – insufficiently thick sheet does not close the flux, causing part of the flux to be lost to the other side.
- Steel type – low-carbon steel attracts best. Alloy steels lower magnetic permeability and holding force.
- Surface structure – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Roughness creates an air distance.
- Thermal conditions – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and in frost they can be stronger (up to a certain limit).
Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, in contrast under parallel forces the load capacity is reduced by as much as 75%. Moreover, even a slight gap between the magnet’s surface and the plate decreases the lifting capacity.
Warnings
Keep away from computers
Device Safety: Strong magnets can damage payment cards and delicate electronics (heart implants, hearing aids, timepieces).
Handling guide
Before starting, read the rules. Sudden snapping can destroy the magnet or hurt your hand. Think ahead.
Medical implants
Individuals with a heart stimulator have to keep an large gap from magnets. The magnetism can disrupt the operation of the implant.
Avoid contact if allergic
Some people have a sensitization to nickel, which is the common plating for neodymium magnets. Prolonged contact can result in an allergic reaction. It is best to use safety gloves.
Thermal limits
Monitor thermal conditions. Heating the magnet to high heat will permanently weaken its magnetic structure and strength.
Bodily injuries
Watch your fingers. Two powerful magnets will snap together instantly with a force of several hundred kilograms, crushing anything in their path. Be careful!
Flammability
Powder generated during machining of magnets is self-igniting. Do not drill into magnets unless you are an expert.
This is not a toy
Product intended for adults. Small elements pose a choking risk, leading to intestinal necrosis. Keep out of reach of children and animals.
Impact on smartphones
Navigation devices and smartphones are extremely sensitive to magnetism. Direct contact with a strong magnet can decalibrate the sensors in your phone.
Material brittleness
Beware of splinters. Magnets can explode upon uncontrolled impact, launching shards into the air. Eye protection is mandatory.
