MW 38x3.5 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010062
GTIN/EAN: 5906301810612
Diameter Ø
38 mm [±0,1 mm]
Height
3.5 mm [±0,1 mm]
Weight
29.77 g
Magnetization Direction
↑ axial
Load capacity
5.09 kg / 49.91 N
Magnetic Induction
112.31 mT / 1123 Gs
Coating
[NiCuNi] Nickel
15.83 ZŁ with VAT / pcs + price for transport
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Technical details - MW 38x3.5 / N38 - cylindrical magnet
Specification / characteristics - MW 38x3.5 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010062 |
| GTIN/EAN | 5906301810612 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 38 mm [±0,1 mm] |
| Height | 3.5 mm [±0,1 mm] |
| Weight | 29.77 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 5.09 kg / 49.91 N |
| Magnetic Induction ~ ? | 112.31 mT / 1123 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 |
Physical analysis of the product - technical parameters
These data constitute the result of a engineering simulation. Values are based on algorithms for the class Nd2Fe14B. Actual performance might slightly deviate from the simulation results. Treat these calculations as a supplementary guide during assembly planning.
Table 1: Static force (pull vs gap) - power drop
MW 38x3.5 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
1123 Gs
112.3 mT
|
5.09 kg / 11.22 LBS
5090.0 g / 49.9 N
|
warning |
| 1 mm |
1103 Gs
110.3 mT
|
4.91 kg / 10.82 LBS
4910.1 g / 48.2 N
|
warning |
| 2 mm |
1075 Gs
107.5 mT
|
4.66 kg / 10.28 LBS
4663.0 g / 45.7 N
|
warning |
| 3 mm |
1040 Gs
104.0 mT
|
4.36 kg / 9.62 LBS
4364.2 g / 42.8 N
|
warning |
| 5 mm |
954 Gs
95.4 mT
|
3.67 kg / 8.10 LBS
3673.1 g / 36.0 N
|
warning |
| 10 mm |
703 Gs
70.3 mT
|
2.00 kg / 4.40 LBS
1997.1 g / 19.6 N
|
safe |
| 15 mm |
483 Gs
48.3 mT
|
0.94 kg / 2.08 LBS
943.2 g / 9.3 N
|
safe |
| 20 mm |
326 Gs
32.6 mT
|
0.43 kg / 0.95 LBS
429.7 g / 4.2 N
|
safe |
| 30 mm |
155 Gs
15.5 mT
|
0.10 kg / 0.21 LBS
97.1 g / 1.0 N
|
safe |
| 50 mm |
47 Gs
4.7 mT
|
0.01 kg / 0.02 LBS
8.9 g / 0.1 N
|
safe |
Table 2: Sliding force (vertical surface)
MW 38x3.5 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
1.02 kg / 2.24 LBS
1018.0 g / 10.0 N
|
| 1 mm | Stal (~0.2) |
0.98 kg / 2.16 LBS
982.0 g / 9.6 N
|
| 2 mm | Stal (~0.2) |
0.93 kg / 2.05 LBS
932.0 g / 9.1 N
|
| 3 mm | Stal (~0.2) |
0.87 kg / 1.92 LBS
872.0 g / 8.6 N
|
| 5 mm | Stal (~0.2) |
0.73 kg / 1.62 LBS
734.0 g / 7.2 N
|
| 10 mm | Stal (~0.2) |
0.40 kg / 0.88 LBS
400.0 g / 3.9 N
|
| 15 mm | Stal (~0.2) |
0.19 kg / 0.41 LBS
188.0 g / 1.8 N
|
| 20 mm | Stal (~0.2) |
0.09 kg / 0.19 LBS
86.0 g / 0.8 N
|
| 30 mm | Stal (~0.2) |
0.02 kg / 0.04 LBS
20.0 g / 0.2 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
2.0 g / 0.0 N
|
Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MW 38x3.5 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
1.53 kg / 3.37 LBS
1527.0 g / 15.0 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
1.02 kg / 2.24 LBS
1018.0 g / 10.0 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.51 kg / 1.12 LBS
509.0 g / 5.0 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
2.55 kg / 5.61 LBS
2545.0 g / 25.0 N
|
Table 4: Steel thickness (substrate influence) - power losses
MW 38x3.5 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.51 kg / 1.12 LBS
509.0 g / 5.0 N
|
| 1 mm |
|
1.27 kg / 2.81 LBS
1272.5 g / 12.5 N
|
| 2 mm |
|
2.55 kg / 5.61 LBS
2545.0 g / 25.0 N
|
| 3 mm |
|
3.82 kg / 8.42 LBS
3817.5 g / 37.4 N
|
| 5 mm |
|
5.09 kg / 11.22 LBS
5090.0 g / 49.9 N
|
| 10 mm |
|
5.09 kg / 11.22 LBS
5090.0 g / 49.9 N
|
| 11 mm |
|
5.09 kg / 11.22 LBS
5090.0 g / 49.9 N
|
| 12 mm |
|
5.09 kg / 11.22 LBS
5090.0 g / 49.9 N
|
Table 5: Thermal resistance (stability) - resistance threshold
MW 38x3.5 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
5.09 kg / 11.22 LBS
5090.0 g / 49.9 N
|
OK |
| 40 °C | -2.2% |
4.98 kg / 10.97 LBS
4978.0 g / 48.8 N
|
OK |
| 60 °C | -4.4% |
4.87 kg / 10.73 LBS
4866.0 g / 47.7 N
|
|
| 80 °C | -6.6% |
4.75 kg / 10.48 LBS
4754.1 g / 46.6 N
|
|
| 100 °C | -28.8% |
3.62 kg / 7.99 LBS
3624.1 g / 35.6 N
|
Table 6: Two magnets (attraction) - field collision
MW 38x3.5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
8.82 kg / 19.44 LBS
2 143 Gs
|
1.32 kg / 2.92 LBS
1323 g / 13.0 N
|
N/A |
| 1 mm |
8.68 kg / 19.13 LBS
2 228 Gs
|
1.30 kg / 2.87 LBS
1302 g / 12.8 N
|
7.81 kg / 17.22 LBS
~0 Gs
|
| 2 mm |
8.51 kg / 18.75 LBS
2 206 Gs
|
1.28 kg / 2.81 LBS
1276 g / 12.5 N
|
7.66 kg / 16.88 LBS
~0 Gs
|
| 3 mm |
8.31 kg / 18.31 LBS
2 180 Gs
|
1.25 kg / 2.75 LBS
1246 g / 12.2 N
|
7.47 kg / 16.48 LBS
~0 Gs
|
| 5 mm |
7.83 kg / 17.26 LBS
2 116 Gs
|
1.17 kg / 2.59 LBS
1174 g / 11.5 N
|
7.05 kg / 15.53 LBS
~0 Gs
|
| 10 mm |
6.36 kg / 14.03 LBS
1 908 Gs
|
0.95 kg / 2.10 LBS
955 g / 9.4 N
|
5.73 kg / 12.63 LBS
~0 Gs
|
| 20 mm |
3.46 kg / 7.63 LBS
1 407 Gs
|
0.52 kg / 1.14 LBS
519 g / 5.1 N
|
3.11 kg / 6.87 LBS
~0 Gs
|
| 50 mm |
0.35 kg / 0.76 LBS
445 Gs
|
0.05 kg / 0.11 LBS
52 g / 0.5 N
|
0.31 kg / 0.69 LBS
~0 Gs
|
| 60 mm |
0.17 kg / 0.37 LBS
310 Gs
|
0.03 kg / 0.06 LBS
25 g / 0.2 N
|
0.15 kg / 0.33 LBS
~0 Gs
|
| 70 mm |
0.09 kg / 0.19 LBS
222 Gs
|
0.01 kg / 0.03 LBS
13 g / 0.1 N
|
0.08 kg / 0.17 LBS
~0 Gs
|
| 80 mm |
0.05 kg / 0.10 LBS
163 Gs
|
0.01 kg / 0.02 LBS
7 g / 0.1 N
|
0.04 kg / 0.09 LBS
~0 Gs
|
| 90 mm |
0.03 kg / 0.06 LBS
122 Gs
|
0.00 kg / 0.01 LBS
4 g / 0.0 N
|
0.02 kg / 0.05 LBS
~0 Gs
|
| 100 mm |
0.02 kg / 0.03 LBS
94 Gs
|
0.00 kg / 0.01 LBS
2 g / 0.0 N
|
0.01 kg / 0.03 LBS
~0 Gs
|
Table 7: Safety (HSE) (electronics) - warnings
MW 38x3.5 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 11.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 9.0 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 7.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 5.5 cm |
| Car key | 50 Gs (5.0 mT) | 5.0 cm |
| Payment card | 400 Gs (40.0 mT) | 2.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.5 cm |
Table 8: Collisions (cracking risk) - collision effects
MW 38x3.5 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
16.10 km/h
(4.47 m/s)
|
0.30 J | |
| 30 mm |
23.11 km/h
(6.42 m/s)
|
0.61 J | |
| 50 mm |
29.52 km/h
(8.20 m/s)
|
1.00 J | |
| 100 mm |
41.70 km/h
(11.58 m/s)
|
2.00 J |
Table 9: Anti-corrosion coating durability
MW 38x3.5 / 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 38x3.5 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 17 022 Mx | 170.2 µWb |
| Pc Coefficient | 0.14 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
MW 38x3.5 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 5.09 kg | Standard |
| Water (riverbed) |
5.83 kg
(+0.74 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Note: On a vertical wall, the magnet holds only ~20% of its max power.
2. Efficiency vs thickness
*Thin steel (e.g. 0.5mm PC case) significantly reduces the holding force.
3. Heat tolerance
*For N38 grade, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.14
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.
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other offers
Advantages as well as disadvantages of neodymium magnets.
Strengths
- Their strength is maintained, and after approximately 10 years it decreases only by ~1% (theoretically),
- They have excellent resistance to magnetism drop as a result of external magnetic sources,
- Thanks to the elegant finish, the surface of nickel, gold, or silver-plated gives an professional appearance,
- Magnets possess extremely high magnetic induction on the surface,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
- Thanks to the possibility of precise molding and adaptation to individualized requirements, NdFeB magnets can be produced in a variety of forms and dimensions, which amplifies use scope,
- Versatile presence in modern technologies – they serve a role in data components, motor assemblies, medical devices, and technologically advanced constructions.
- Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,
Limitations
- They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
- When exposed to high temperature, neodymium magnets suffer a drop in power. 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
- They rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
- Due to limitations in realizing nuts and complex forms in magnets, we recommend using casing - magnetic mechanism.
- Health risk resulting from small fragments of magnets are risky, in case of ingestion, which becomes key in the context of child health protection. It is also worth noting that small elements of these products are able to disrupt the diagnostic process medical after entering the body.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Lifting parameters
Highest magnetic holding force – what it depends on?
- on a block made of structural steel, optimally conducting the magnetic field
- whose transverse dimension equals approx. 10 mm
- with an ideally smooth touching surface
- without any air gap between the magnet and steel
- during detachment in a direction perpendicular to the plane
- at room temperature
Determinants of practical lifting force of a magnet
- Gap (betwixt the magnet and the metal), as even a very small clearance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to paint, corrosion or dirt).
- Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
- Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
- Material composition – different alloys reacts the same. High carbon content worsen the attraction effect.
- Smoothness – ideal contact is obtained only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
- Thermal factor – high temperature reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.
Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under parallel forces the holding force is lower. Moreover, even a small distance between the magnet and the plate lowers the load capacity.
Safety rules for work with neodymium magnets
Threat to electronics
Do not bring magnets near a purse, computer, or screen. The magnetism can irreversibly ruin these devices and erase data from cards.
Metal Allergy
Allergy Notice: The nickel-copper-nickel coating consists of nickel. If an allergic reaction happens, cease handling magnets and use protective gear.
Crushing force
Mind your fingers. Two powerful magnets will join immediately with a force of several hundred kilograms, destroying anything in their path. Exercise extreme caution!
Magnetic interference
Be aware: rare earth magnets produce a field that disrupts sensitive sensors. Keep a safe distance from your phone, tablet, and GPS.
Risk of cracking
NdFeB magnets are sintered ceramics, which means they are fragile like glass. Collision of two magnets leads to them shattering into small pieces.
No play value
Strictly keep magnets away from children. Choking hazard is significant, and the consequences of magnets clamping inside the body are very dangerous.
Permanent damage
Watch the temperature. Heating the magnet above 80 degrees Celsius will ruin its magnetic structure and strength.
Handling guide
Before starting, check safety instructions. Sudden snapping can destroy the magnet or hurt your hand. Think ahead.
Fire risk
Mechanical processing of neodymium magnets carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is hard to extinguish.
ICD Warning
Individuals with a pacemaker have to keep an absolute distance from magnets. The magnetism can stop the functioning of the implant.
