MW 5x4 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010089
GTIN/EAN: 5906301810889
Diameter Ø
5 mm [±0,1 mm]
Height
4 mm [±0,1 mm]
Weight
0.59 g
Magnetization Direction
↑ axial
Load capacity
0.84 kg / 8.24 N
Magnetic Induction
524.45 mT / 5244 Gs
Coating
[NiCuNi] Nickel
0.369 ZŁ with VAT / pcs + price for transport
0.300 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Call us now
+48 22 499 98 98
alternatively let us know by means of
contact form
the contact page.
Lifting power and form of magnets can be analyzed on our
power calculator.
Same-day shipping for orders placed before 14:00.
Technical data - MW 5x4 / N38 - cylindrical magnet
Specification / characteristics - MW 5x4 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010089 |
| GTIN/EAN | 5906301810889 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 5 mm [±0,1 mm] |
| Height | 4 mm [±0,1 mm] |
| Weight | 0.59 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.84 kg / 8.24 N |
| Magnetic Induction ~ ? | 524.45 mT / 5244 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 simulation of the product - report
Presented values are the direct effect of a mathematical simulation. Results rely on models for the class Nd2Fe14B. Actual conditions might slightly deviate from the simulation results. Please consider these calculations as a reference point when designing systems.
Table 1: Static force (pull vs gap) - characteristics
MW 5x4 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
5236 Gs
523.6 mT
|
0.84 kg / 1.85 lbs
840.0 g / 8.2 N
|
safe |
| 1 mm |
3243 Gs
324.3 mT
|
0.32 kg / 0.71 lbs
322.1 g / 3.2 N
|
safe |
| 2 mm |
1850 Gs
185.0 mT
|
0.10 kg / 0.23 lbs
104.8 g / 1.0 N
|
safe |
| 3 mm |
1076 Gs
107.6 mT
|
0.04 kg / 0.08 lbs
35.5 g / 0.3 N
|
safe |
| 5 mm |
428 Gs
42.8 mT
|
0.01 kg / 0.01 lbs
5.6 g / 0.1 N
|
safe |
| 10 mm |
89 Gs
8.9 mT
|
0.00 kg / 0.00 lbs
0.2 g / 0.0 N
|
safe |
| 15 mm |
31 Gs
3.1 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
| 20 mm |
15 Gs
1.5 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
| 30 mm |
5 Gs
0.5 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
| 50 mm |
1 Gs
0.1 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
Table 2: Sliding hold (wall)
MW 5x4 / 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) |
0.06 kg / 0.14 lbs
64.0 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 / 0.02 lbs
8.0 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 (shearing) - vertical pull
MW 5x4 / 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: Material efficiency (substrate influence) - power losses
MW 5x4 / 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: Working in heat (material behavior) - resistance threshold
MW 5x4 / 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 (attraction) - forces in the system
MW 5x4 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
3.32 kg / 7.32 lbs
5 894 Gs
|
0.50 kg / 1.10 lbs
498 g / 4.9 N
|
N/A |
| 1 mm |
2.14 kg / 4.72 lbs
8 408 Gs
|
0.32 kg / 0.71 lbs
321 g / 3.1 N
|
1.93 kg / 4.24 lbs
~0 Gs
|
| 2 mm |
1.27 kg / 2.81 lbs
6 486 Gs
|
0.19 kg / 0.42 lbs
191 g / 1.9 N
|
1.15 kg / 2.53 lbs
~0 Gs
|
| 3 mm |
0.73 kg / 1.61 lbs
4 909 Gs
|
0.11 kg / 0.24 lbs
109 g / 1.1 N
|
0.66 kg / 1.45 lbs
~0 Gs
|
| 5 mm |
0.24 kg / 0.53 lbs
2 805 Gs
|
0.04 kg / 0.08 lbs
36 g / 0.4 N
|
0.21 kg / 0.47 lbs
~0 Gs
|
| 10 mm |
0.02 kg / 0.05 lbs
857 Gs
|
0.00 kg / 0.01 lbs
3 g / 0.0 N
|
0.02 kg / 0.04 lbs
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 lbs
177 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
16 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
9 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
6 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
4 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
3 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: Hazards (electronics) - warnings
MW 5x4 / 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 |
| Timepiece | 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) | 1.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 0.5 cm |
Table 8: Dynamics (cracking risk) - collision effects
MW 5x4 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
38.06 km/h
(10.57 m/s)
|
0.03 J | |
| 30 mm |
65.91 km/h
(18.31 m/s)
|
0.10 J | |
| 50 mm |
85.09 km/h
(23.64 m/s)
|
0.16 J | |
| 100 mm |
120.34 km/h
(33.43 m/s)
|
0.33 J |
Table 9: Anti-corrosion coating durability
MW 5x4 / 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 (Flux)
MW 5x4 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 1 046 Mx | 10.5 µWb |
| Pc Coefficient | 0.79 | High (Stable) |
Table 11: Hydrostatics and buoyancy
MW 5x4 / 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. Sliding resistance
*Warning: On a vertical surface, the magnet holds just a fraction of its max power.
2. Steel saturation
*Thin steel (e.g. computer case) drastically limits the holding force.
3. Heat tolerance
*For standard magnets, the critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.79
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 |
See more offers
Pros and cons of Nd2Fe14B magnets.
Benefits
- They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
- They are noted for resistance to demagnetization induced by external disturbances,
- Thanks to the shiny finish, the surface of Ni-Cu-Ni, gold-plated, or silver-plated gives an aesthetic appearance,
- Magnets are characterized by excellent magnetic induction on the outer layer,
- Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
- Thanks to flexibility in designing and the ability to modify to complex applications,
- Huge importance in advanced technology sectors – they are utilized in mass storage devices, electric motors, medical devices, and modern systems.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Limitations
- To avoid cracks under impact, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
- Neodymium magnets decrease their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures 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 suggest casing - magnetic mount, due to difficulties in realizing nuts inside the magnet and complicated forms.
- Health risk to health – tiny shards of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these devices can disrupt the diagnostic process medical after entering the body.
- With large orders the cost of neodymium magnets is economically unviable,
Lifting parameters
Detachment force of the magnet in optimal conditions – what contributes to it?
- on a block made of mild steel, optimally conducting the magnetic field
- possessing a thickness of minimum 10 mm to ensure full flux closure
- with an ideally smooth touching surface
- under conditions of gap-free contact (surface-to-surface)
- for force applied at a right angle (in the magnet axis)
- in neutral thermal conditions
Practical lifting capacity: influencing factors
- Gap between surfaces – every millimeter of separation (caused e.g. by veneer or dirt) diminishes the pulling force, often by half at just 0.5 mm.
- Force direction – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet exhibits much less (typically approx. 20-30% of nominal force).
- Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of generating force.
- Material composition – different alloys attracts identically. Alloy additives worsen the attraction effect.
- Smoothness – full contact is possible only on smooth steel. Rough texture create air cushions, weakening the magnet.
- Temperature influence – hot environment weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity was assessed by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular detachment force, whereas under attempts to slide the magnet the holding force is lower. Additionally, even a minimal clearance between the magnet and the plate lowers the lifting capacity.
Precautions when working with NdFeB magnets
Maximum temperature
Control the heat. Exposing the magnet to high heat will ruin its properties and pulling force.
Warning for heart patients
Warning for patients: Strong magnetic fields affect medical devices. Keep minimum 30 cm distance or request help to handle the magnets.
Fire warning
Powder created during machining of magnets is flammable. Do not drill into magnets without proper cooling and knowledge.
Avoid contact if allergic
Studies show that nickel (standard magnet coating) is a potent allergen. If you have an allergy, avoid direct skin contact and opt for coated magnets.
Data carriers
Avoid bringing magnets near a wallet, computer, or screen. The magnetic field can permanently damage these devices and wipe information from cards.
Crushing risk
Protect your hands. Two large magnets will snap together immediately with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!
Magnetic interference
A powerful magnetic field disrupts the functioning of magnetometers in smartphones and GPS navigation. Keep magnets near a device to prevent damaging the sensors.
Fragile material
NdFeB magnets are ceramic materials, which means they are very brittle. Impact of two magnets leads to them cracking into shards.
Caution required
Use magnets consciously. Their immense force can shock even experienced users. Be vigilant and respect their force.
Keep away from children
Always keep magnets away from children. Risk of swallowing is high, and the consequences of magnets connecting inside the body are tragic.
