MW 9x3 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010108
GTIN/EAN: 5906301811077
Diameter Ø
9 mm [±0,1 mm]
Height
3 mm [±0,1 mm]
Weight
1.43 g
Magnetization Direction
↑ axial
Load capacity
1.94 kg / 18.99 N
Magnetic Induction
343.55 mT / 3436 Gs
Coating
[NiCuNi] Nickel
1.132 ZŁ with VAT / pcs + price for transport
0.920 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Give us a call
+48 888 99 98 98
if you prefer let us know through
our online form
the contact section.
Lifting power along with shape of magnets can be analyzed on our
online calculation tool.
Orders placed before 14:00 will be shipped the same business day.
Product card - MW 9x3 / N38 - cylindrical magnet
Specification / characteristics - MW 9x3 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010108 |
| GTIN/EAN | 5906301811077 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 9 mm [±0,1 mm] |
| Height | 3 mm [±0,1 mm] |
| Weight | 1.43 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 1.94 kg / 18.99 N |
| Magnetic Induction ~ ? | 343.55 mT / 3436 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 |
Engineering simulation of the product - data
Presented data constitute the outcome of a mathematical analysis. Values were calculated on algorithms for the class Nd2Fe14B. Real-world conditions may differ. Treat these data as a reference point when designing systems.
Table 1: Static force (pull vs distance) - power drop
MW 9x3 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3433 Gs
343.3 mT
|
1.94 kg / 4.28 lbs
1940.0 g / 19.0 N
|
safe |
| 1 mm |
2774 Gs
277.4 mT
|
1.27 kg / 2.79 lbs
1266.5 g / 12.4 N
|
safe |
| 2 mm |
2090 Gs
209.0 mT
|
0.72 kg / 1.59 lbs
719.2 g / 7.1 N
|
safe |
| 3 mm |
1521 Gs
152.1 mT
|
0.38 kg / 0.84 lbs
380.7 g / 3.7 N
|
safe |
| 5 mm |
795 Gs
79.5 mT
|
0.10 kg / 0.23 lbs
104.1 g / 1.0 N
|
safe |
| 10 mm |
205 Gs
20.5 mT
|
0.01 kg / 0.02 lbs
6.9 g / 0.1 N
|
safe |
| 15 mm |
76 Gs
7.6 mT
|
0.00 kg / 0.00 lbs
1.0 g / 0.0 N
|
safe |
| 20 mm |
36 Gs
3.6 mT
|
0.00 kg / 0.00 lbs
0.2 g / 0.0 N
|
safe |
| 30 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
| 50 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
Table 2: Shear hold (vertical surface)
MW 9x3 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.39 kg / 0.86 lbs
388.0 g / 3.8 N
|
| 1 mm | Stal (~0.2) |
0.25 kg / 0.56 lbs
254.0 g / 2.5 N
|
| 2 mm | Stal (~0.2) |
0.14 kg / 0.32 lbs
144.0 g / 1.4 N
|
| 3 mm | Stal (~0.2) |
0.08 kg / 0.17 lbs
76.0 g / 0.7 N
|
| 5 mm | Stal (~0.2) |
0.02 kg / 0.04 lbs
20.0 g / 0.2 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
2.0 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 9x3 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.58 kg / 1.28 lbs
582.0 g / 5.7 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.39 kg / 0.86 lbs
388.0 g / 3.8 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.19 kg / 0.43 lbs
194.0 g / 1.9 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.97 kg / 2.14 lbs
970.0 g / 9.5 N
|
Table 4: Material efficiency (saturation) - power losses
MW 9x3 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.19 kg / 0.43 lbs
194.0 g / 1.9 N
|
| 1 mm |
|
0.49 kg / 1.07 lbs
485.0 g / 4.8 N
|
| 2 mm |
|
0.97 kg / 2.14 lbs
970.0 g / 9.5 N
|
| 3 mm |
|
1.46 kg / 3.21 lbs
1455.0 g / 14.3 N
|
| 5 mm |
|
1.94 kg / 4.28 lbs
1940.0 g / 19.0 N
|
| 10 mm |
|
1.94 kg / 4.28 lbs
1940.0 g / 19.0 N
|
| 11 mm |
|
1.94 kg / 4.28 lbs
1940.0 g / 19.0 N
|
| 12 mm |
|
1.94 kg / 4.28 lbs
1940.0 g / 19.0 N
|
Table 5: Working in heat (material behavior) - thermal limit
MW 9x3 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
1.94 kg / 4.28 lbs
1940.0 g / 19.0 N
|
OK |
| 40 °C | -2.2% |
1.90 kg / 4.18 lbs
1897.3 g / 18.6 N
|
OK |
| 60 °C | -4.4% |
1.85 kg / 4.09 lbs
1854.6 g / 18.2 N
|
|
| 80 °C | -6.6% |
1.81 kg / 3.99 lbs
1812.0 g / 17.8 N
|
|
| 100 °C | -28.8% |
1.38 kg / 3.05 lbs
1381.3 g / 13.6 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 9x3 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
4.62 kg / 10.19 lbs
4 949 Gs
|
0.69 kg / 1.53 lbs
693 g / 6.8 N
|
N/A |
| 1 mm |
3.82 kg / 8.43 lbs
6 244 Gs
|
0.57 kg / 1.26 lbs
573 g / 5.6 N
|
3.44 kg / 7.58 lbs
~0 Gs
|
| 2 mm |
3.02 kg / 6.65 lbs
5 548 Gs
|
0.45 kg / 1.00 lbs
453 g / 4.4 N
|
2.72 kg / 5.99 lbs
~0 Gs
|
| 3 mm |
2.30 kg / 5.08 lbs
4 847 Gs
|
0.35 kg / 0.76 lbs
346 g / 3.4 N
|
2.07 kg / 4.57 lbs
~0 Gs
|
| 5 mm |
1.25 kg / 2.76 lbs
3 575 Gs
|
0.19 kg / 0.41 lbs
188 g / 1.8 N
|
1.13 kg / 2.49 lbs
~0 Gs
|
| 10 mm |
0.25 kg / 0.55 lbs
1 591 Gs
|
0.04 kg / 0.08 lbs
37 g / 0.4 N
|
0.22 kg / 0.49 lbs
~0 Gs
|
| 20 mm |
0.02 kg / 0.04 lbs
410 Gs
|
0.00 kg / 0.01 lbs
2 g / 0.0 N
|
0.01 kg / 0.03 lbs
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 lbs
39 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
23 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
15 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
10 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
7 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
5 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
Table 7: Protective zones (electronics) - warnings
MW 9x3 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 4.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 3.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 2.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 2.0 cm |
| Remote | 50 Gs (5.0 mT) | 2.0 cm |
| Payment card | 400 Gs (40.0 mT) | 1.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Impact energy (cracking risk) - collision effects
MW 9x3 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
37.23 km/h
(10.34 m/s)
|
0.08 J | |
| 30 mm |
64.34 km/h
(17.87 m/s)
|
0.23 J | |
| 50 mm |
83.06 km/h
(23.07 m/s)
|
0.38 J | |
| 100 mm |
117.47 km/h
(32.63 m/s)
|
0.76 J |
Table 9: Anti-corrosion coating durability
MW 9x3 / 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 (Pc)
MW 9x3 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 2 314 Mx | 23.1 µWb |
| Pc Coefficient | 0.44 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
MW 9x3 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 1.94 kg | Standard |
| Water (riverbed) |
2.22 kg
(+0.28 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Warning: On a vertical wall, the magnet holds only ~20% of its perpendicular strength.
2. Steel saturation
*Thin steel (e.g. computer case) severely weakens the holding force.
3. Temperature resistance
*For N38 material, the critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.44
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
View more products
Advantages and disadvantages of neodymium magnets.
Benefits
- They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (according to literature),
- They show high resistance to demagnetization induced by presence of other magnetic fields,
- Thanks to the elegant finish, the coating of Ni-Cu-Ni, gold, or silver-plated gives an aesthetic appearance,
- Magnets exhibit exceptionally strong magnetic induction on the outer layer,
- Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
- Thanks to the possibility of accurate molding and customization to specialized solutions, magnetic components can be produced in a wide range of forms and dimensions, which increases their versatility,
- Huge importance in innovative solutions – they are used in HDD drives, drive modules, advanced medical instruments, and complex engineering applications.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Disadvantages
- At strong impacts they can break, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
- NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
- They oxidize in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
- Due to limitations in producing threads and complex forms in magnets, we propose using a housing - magnetic holder.
- Potential hazard resulting from small fragments of magnets can be dangerous, in case of ingestion, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small components of these magnets are able to disrupt the diagnostic process medical after entering the body.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities
Holding force characteristics
Maximum holding power of the magnet – what contributes to it?
- on a base made of mild steel, perfectly concentrating the magnetic field
- possessing a massiveness of minimum 10 mm to avoid saturation
- with an ground contact surface
- under conditions of no distance (metal-to-metal)
- for force applied at a right angle (pull-off, not shear)
- at standard ambient temperature
Practical aspects of lifting capacity – factors
- Distance (between the magnet and the plate), as even a very small clearance (e.g. 0.5 mm) results in a drastic drop in lifting capacity by up to 50% (this also applies to paint, corrosion or debris).
- Force direction – declared lifting capacity refers to detachment vertically. When slipping, the magnet exhibits much less (often approx. 20-30% of maximum force).
- Plate thickness – insufficiently thick steel does not close the flux, causing part of the flux to be lost to the other side.
- Material composition – not every steel attracts identically. Alloy additives weaken the attraction effect.
- Smoothness – ideal contact is possible only on smooth steel. Rough texture reduce the real contact area, weakening the magnet.
- Thermal factor – high temperature reduces magnetic field. Exceeding the limit temperature can permanently damage the magnet.
Lifting capacity was measured with the use of a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, whereas under attempts to slide the magnet the holding force is lower. Moreover, even a slight gap between the magnet’s surface and the plate reduces the holding force.
Warnings
Heat warning
Standard neodymium magnets (N-type) lose power when the temperature goes above 80°C. This process is irreversible.
Machining danger
Dust generated during cutting of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.
Magnetic interference
Note: neodymium magnets produce a field that confuses sensitive sensors. Keep a separation from your mobile, tablet, and GPS.
Metal Allergy
Certain individuals have a sensitization to Ni, which is the standard coating for NdFeB magnets. Extended handling may cause dermatitis. We strongly advise wear safety gloves.
Keep away from computers
Powerful magnetic fields can destroy records on credit cards, HDDs, and storage devices. Maintain a gap of at least 10 cm.
This is not a toy
Always store magnets out of reach of children. Risk of swallowing is significant, and the effects of magnets connecting inside the body are very dangerous.
Medical interference
People with a pacemaker have to keep an large gap from magnets. The magnetism can disrupt the functioning of the life-saving device.
Pinching danger
Danger of trauma: The pulling power is so great that it can cause blood blisters, crushing, and even bone fractures. Protective gloves are recommended.
Material brittleness
Watch out for shards. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.
Safe operation
Use magnets consciously. Their huge power can shock even experienced users. Stay alert and respect their force.
