MW 3x6 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010065
GTIN/EAN: 5906301810643
- Diameter Ø
- 3 mm [±0,1 mm]
- Height
- 6 mm [±0,1 mm]
- Weight
- 0.32 g
- Magnetization Direction
- ↑ axial
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
0.240 zł net / pcs
0.295 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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Detailed specification - MW 3x6 / N38 - cylindrical magnet
Specification / characteristics - MW 3x6 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010065 |
| GTIN/EAN | 5906301810643 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 3 mm [±0,1 mm] |
| Height | 6 mm [±0,1 mm] |
| Weight | 0.32 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.20 kg / 1.95 N |
| Magnetic Induction ~ ? | 598.96 mT / 5990 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 analysis of the product - technical parameters
These information constitute the result of a engineering simulation. Values were calculated on models for the material Nd2Fe14B. Actual performance might slightly deviate from the simulation results. Treat these data as a supplementary guide for designers.
Table 1: Static pull force (force vs gap) - interaction chart
MW 3x6 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
5974 Gs
597.4 mT
|
0.20 kg / 0.44 lbs
200.0 g / 2.0 N
|
low risk |
| 1 mm |
2623 Gs
262.3 mT
|
0.04 kg / 0.09 lbs
38.6 g / 0.4 N
|
low risk |
| 2 mm |
1134 Gs
113.4 mT
|
0.01 kg / 0.02 lbs
7.2 g / 0.1 N
|
low risk |
| 3 mm |
570 Gs
57.0 mT
|
0.00 kg / 0.00 lbs
1.8 g / 0.0 N
|
low risk |
| 5 mm |
205 Gs
20.5 mT
|
0.00 kg / 0.00 lbs
0.2 g / 0.0 N
|
low risk |
| 10 mm |
42 Gs
4.2 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
low risk |
| 15 mm |
15 Gs
1.5 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
low risk |
| 20 mm |
7 Gs
0.7 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
low risk |
| 30 mm |
2 Gs
0.2 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
low risk |
| 50 mm |
1 Gs
0.1 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
low risk |
Table 2: Slippage load (wall)
MW 3x6 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.04 kg / 0.09 lbs
40.0 g / 0.4 N
|
| 1 mm | Stal (~0.2) |
0.01 kg / 0.02 lbs
8.0 g / 0.1 N
|
| 2 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
2.0 g / 0.0 N
|
| 3 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
| 5 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
0.0 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 (shearing) - behavior on slippery surfaces
MW 3x6 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.06 kg / 0.13 lbs
60.0 g / 0.6 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.04 kg / 0.09 lbs
40.0 g / 0.4 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.02 kg / 0.04 lbs
20.0 g / 0.2 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.10 kg / 0.22 lbs
100.0 g / 1.0 N
|
Table 4: Steel thickness (saturation) - power losses
MW 3x6 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.02 kg / 0.04 lbs
20.0 g / 0.2 N
|
| 1 mm |
|
0.05 kg / 0.11 lbs
50.0 g / 0.5 N
|
| 2 mm |
|
0.10 kg / 0.22 lbs
100.0 g / 1.0 N
|
| 3 mm |
|
0.15 kg / 0.33 lbs
150.0 g / 1.5 N
|
| 5 mm |
|
0.20 kg / 0.44 lbs
200.0 g / 2.0 N
|
| 10 mm |
|
0.20 kg / 0.44 lbs
200.0 g / 2.0 N
|
| 11 mm |
|
0.20 kg / 0.44 lbs
200.0 g / 2.0 N
|
| 12 mm |
|
0.20 kg / 0.44 lbs
200.0 g / 2.0 N
|
Table 5: Thermal resistance (material behavior) - thermal limit
MW 3x6 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.20 kg / 0.44 lbs
200.0 g / 2.0 N
|
OK |
| 40 °C | -2.2% |
0.20 kg / 0.43 lbs
195.6 g / 1.9 N
|
OK |
| 60 °C | -4.4% |
0.19 kg / 0.42 lbs
191.2 g / 1.9 N
|
OK |
| 80 °C | -6.6% |
0.19 kg / 0.41 lbs
186.8 g / 1.8 N
|
|
| 100 °C | -28.8% |
0.14 kg / 0.31 lbs
142.4 g / 1.4 N
|
Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 3x6 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
1.56 kg / 3.43 lbs
6 111 Gs
|
0.23 kg / 0.51 lbs
233 g / 2.3 N
|
N/A |
| 1 mm |
0.73 kg / 1.60 lbs
8 161 Gs
|
0.11 kg / 0.24 lbs
109 g / 1.1 N
|
0.65 kg / 1.44 lbs
~0 Gs
|
| 2 mm |
0.30 kg / 0.66 lbs
5 246 Gs
|
0.04 kg / 0.10 lbs
45 g / 0.4 N
|
0.27 kg / 0.60 lbs
~0 Gs
|
| 3 mm |
0.13 kg / 0.28 lbs
3 391 Gs
|
0.02 kg / 0.04 lbs
19 g / 0.2 N
|
0.11 kg / 0.25 lbs
~0 Gs
|
| 5 mm |
0.03 kg / 0.06 lbs
1 578 Gs
|
0.00 kg / 0.01 lbs
4 g / 0.0 N
|
0.02 kg / 0.05 lbs
~0 Gs
|
| 10 mm |
0.00 kg / 0.00 lbs
409 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
83 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
8 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
5 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
3 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
2 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
1 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
Table 7: Protective zones (implants) - precautionary measures
MW 3x6 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 2.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 2.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 1.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 1.5 cm |
| Remote | 50 Gs (5.0 mT) | 1.0 cm |
| Payment card | 400 Gs (40.0 mT) | 0.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 0.5 cm |
Table 8: Impact energy (cracking risk) - collision effects
MW 3x6 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
10.03 km/h
(2.79 m/s)
|
0.00 J | |
| 30 mm |
10.03 km/h
(2.79 m/s)
|
0.00 J | |
| 50 mm |
10.03 km/h
(2.79 m/s)
|
0.00 J | |
| 100 mm |
10.03 km/h
(2.79 m/s)
|
0.00 J |
Table 9: Coating parameters (durability)
MW 3x6 / 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 3x6 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 470 Mx | 4.7 µWb |
| Pc Coefficient | 1.21 | High (Stable) |
Table 11: Underwater work (magnet fishing)
MW 3x6 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.20 kg | Standard |
| Water (riverbed) |
0.23 kg
(+0.03 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Warning: On a vertical wall, the magnet retains only approx. 20-30% of its nominal pull.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) severely weakens the holding force.
3. Power loss vs temp
*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) = 1.21
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 |
Check out also products
Strengths and weaknesses of rare earth magnets.
Benefits
- They do not lose power, even during around 10 years – the reduction in power is only ~1% (theoretically),
- Neodymium magnets are characterized by remarkably resistant to demagnetization caused by magnetic disturbances,
- The use of an elegant coating of noble metals (nickel, gold, silver) causes the element to look better,
- They are known for high magnetic induction at the operating surface, which improves attraction properties,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
- Possibility of individual shaping and optimizing to individual needs,
- Fundamental importance in innovative solutions – they serve a role in magnetic memories, electromotive mechanisms, precision medical tools, also multitasking production systems.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Cons
- At strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- NdFeB magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
- Magnets exposed to a humid environment can rust. Therefore while using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
- Due to limitations in producing nuts and complex forms in magnets, we recommend using cover - magnetic mount.
- Health risk resulting from small fragments of magnets are risky, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, tiny parts of these devices can complicate diagnosis medical in case of swallowing.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities
Lifting parameters
Maximum lifting force for a neodymium magnet – what it depends on?
- on a plate made of mild steel, perfectly concentrating the magnetic flux
- with a cross-section of at least 10 mm
- with a surface perfectly flat
- without the slightest air gap between the magnet and steel
- for force acting at a right angle (pull-off, not shear)
- in temp. approx. 20°C
Determinants of lifting force in real conditions
- Gap between magnet and steel – every millimeter of separation (caused e.g. by varnish or dirt) diminishes the pulling force, often by half at just 0.5 mm.
- Angle of force application – maximum parameter is available only during perpendicular pulling. The force required to slide of the magnet along the surface is typically several times lower (approx. 1/5 of the lifting capacity).
- Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
- Steel grade – ideal substrate is pure iron steel. Cast iron may attract less.
- Surface finish – full contact is possible only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
- Thermal environment – heating the magnet causes a temporary drop of induction. Check the thermal limit for a given model.
Lifting capacity was determined with the use of a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, whereas 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 electronics
Remember: rare earth magnets generate a field that interferes with precision electronics. Maintain a separation from your phone, tablet, and GPS.
Powerful field
Before starting, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.
Thermal limits
Standard neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. This process is irreversible.
Allergy Warning
Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If redness appears, cease working with magnets and wear gloves.
Electronic hazard
Do not bring magnets close to a wallet, computer, or screen. The magnetic field can permanently damage these devices and wipe information from cards.
Life threat
Life threat: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have electronic implants.
Machining danger
Fire hazard: Neodymium dust is explosive. Do not process magnets without safety gear as this risks ignition.
Beware of splinters
Despite metallic appearance, neodymium is brittle and cannot withstand shocks. Do not hit, as the magnet may crumble into hazardous fragments.
Adults only
These products are not suitable for play. Eating several magnets can lead to them pinching intestinal walls, which constitutes a critical condition and necessitates immediate surgery.
Physical harm
Pinching hazard: The attraction force is so great that it can cause hematomas, crushing, and even bone fractures. Use thick gloves.
