MW 18x1.5 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010037
GTIN/EAN: 5906301810360
Diameter Ø
18 mm [±0,1 mm]
Height
1.5 mm [±0,1 mm]
Weight
2.86 g
Magnetization Direction
↑ axial
Load capacity
0.95 kg / 9.34 N
Magnetic Induction
101.91 mT / 1019 Gs
Coating
[NiCuNi] Nickel
1.353 ZŁ with VAT / pcs + price for transport
1.100 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Contact us by phone
+48 22 499 98 98
or send us a note via
request form
the contact section.
Weight as well as structure of neodymium magnets can be verified with our
force calculator.
Order by 14:00 and we’ll ship today!
Detailed specification - MW 18x1.5 / N38 - cylindrical magnet
Specification / characteristics - MW 18x1.5 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010037 |
| GTIN/EAN | 5906301810360 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 18 mm [±0,1 mm] |
| Height | 1.5 mm [±0,1 mm] |
| Weight | 2.86 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.95 kg / 9.34 N |
| Magnetic Induction ~ ? | 101.91 mT / 1019 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 assembly - report
These data are the result of a engineering calculation. Values rely on models for the class Nd2Fe14B. Actual performance might slightly differ from theoretical values. Please consider these calculations as a supplementary guide for designers.
Table 1: Static force (force vs gap) - power drop
MW 18x1.5 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
1019 Gs
101.9 mT
|
0.95 kg / 2.09 pounds
950.0 g / 9.3 N
|
low risk |
| 1 mm |
975 Gs
97.5 mT
|
0.87 kg / 1.92 pounds
869.2 g / 8.5 N
|
low risk |
| 2 mm |
902 Gs
90.2 mT
|
0.74 kg / 1.64 pounds
744.7 g / 7.3 N
|
low risk |
| 3 mm |
812 Gs
81.2 mT
|
0.60 kg / 1.33 pounds
603.4 g / 5.9 N
|
low risk |
| 5 mm |
619 Gs
61.9 mT
|
0.35 kg / 0.77 pounds
350.6 g / 3.4 N
|
low risk |
| 10 mm |
274 Gs
27.4 mT
|
0.07 kg / 0.15 pounds
68.7 g / 0.7 N
|
low risk |
| 15 mm |
126 Gs
12.6 mT
|
0.01 kg / 0.03 pounds
14.6 g / 0.1 N
|
low risk |
| 20 mm |
65 Gs
6.5 mT
|
0.00 kg / 0.01 pounds
3.9 g / 0.0 N
|
low risk |
| 30 mm |
23 Gs
2.3 mT
|
0.00 kg / 0.00 pounds
0.5 g / 0.0 N
|
low risk |
| 50 mm |
6 Gs
0.6 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
low risk |
Table 2: Vertical force (vertical surface)
MW 18x1.5 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.19 kg / 0.42 pounds
190.0 g / 1.9 N
|
| 1 mm | Stal (~0.2) |
0.17 kg / 0.38 pounds
174.0 g / 1.7 N
|
| 2 mm | Stal (~0.2) |
0.15 kg / 0.33 pounds
148.0 g / 1.5 N
|
| 3 mm | Stal (~0.2) |
0.12 kg / 0.26 pounds
120.0 g / 1.2 N
|
| 5 mm | Stal (~0.2) |
0.07 kg / 0.15 pounds
70.0 g / 0.7 N
|
| 10 mm | Stal (~0.2) |
0.01 kg / 0.03 pounds
14.0 g / 0.1 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
2.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
Table 3: Wall mounting (shearing) - vertical pull
MW 18x1.5 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.29 kg / 0.63 pounds
285.0 g / 2.8 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.19 kg / 0.42 pounds
190.0 g / 1.9 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.10 kg / 0.21 pounds
95.0 g / 0.9 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.48 kg / 1.05 pounds
475.0 g / 4.7 N
|
Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 18x1.5 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.10 kg / 0.21 pounds
95.0 g / 0.9 N
|
| 1 mm |
|
0.24 kg / 0.52 pounds
237.5 g / 2.3 N
|
| 2 mm |
|
0.48 kg / 1.05 pounds
475.0 g / 4.7 N
|
| 3 mm |
|
0.71 kg / 1.57 pounds
712.5 g / 7.0 N
|
| 5 mm |
|
0.95 kg / 2.09 pounds
950.0 g / 9.3 N
|
| 10 mm |
|
0.95 kg / 2.09 pounds
950.0 g / 9.3 N
|
| 11 mm |
|
0.95 kg / 2.09 pounds
950.0 g / 9.3 N
|
| 12 mm |
|
0.95 kg / 2.09 pounds
950.0 g / 9.3 N
|
Table 5: Working in heat (material behavior) - resistance threshold
MW 18x1.5 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.95 kg / 2.09 pounds
950.0 g / 9.3 N
|
OK |
| 40 °C | -2.2% |
0.93 kg / 2.05 pounds
929.1 g / 9.1 N
|
OK |
| 60 °C | -4.4% |
0.91 kg / 2.00 pounds
908.2 g / 8.9 N
|
|
| 80 °C | -6.6% |
0.89 kg / 1.96 pounds
887.3 g / 8.7 N
|
|
| 100 °C | -28.8% |
0.68 kg / 1.49 pounds
676.4 g / 6.6 N
|
Table 6: Two magnets (attraction) - field range
MW 18x1.5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
1.63 kg / 3.59 pounds
1 960 Gs
|
0.24 kg / 0.54 pounds
244 g / 2.4 N
|
N/A |
| 1 mm |
1.57 kg / 3.47 pounds
2 002 Gs
|
0.24 kg / 0.52 pounds
236 g / 2.3 N
|
1.41 kg / 3.12 pounds
~0 Gs
|
| 2 mm |
1.49 kg / 3.29 pounds
1 949 Gs
|
0.22 kg / 0.49 pounds
224 g / 2.2 N
|
1.34 kg / 2.96 pounds
~0 Gs
|
| 3 mm |
1.39 kg / 3.06 pounds
1 883 Gs
|
0.21 kg / 0.46 pounds
209 g / 2.0 N
|
1.25 kg / 2.76 pounds
~0 Gs
|
| 5 mm |
1.16 kg / 2.55 pounds
1 717 Gs
|
0.17 kg / 0.38 pounds
174 g / 1.7 N
|
1.04 kg / 2.30 pounds
~0 Gs
|
| 10 mm |
0.60 kg / 1.33 pounds
1 238 Gs
|
0.09 kg / 0.20 pounds
90 g / 0.9 N
|
0.54 kg / 1.19 pounds
~0 Gs
|
| 20 mm |
0.12 kg / 0.26 pounds
548 Gs
|
0.02 kg / 0.04 pounds
18 g / 0.2 N
|
0.11 kg / 0.23 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
74 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 pounds
46 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 pounds
30 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 pounds
21 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 90 mm |
0.00 kg / 0.00 pounds
15 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 100 mm |
0.00 kg / 0.00 pounds
11 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Safety (HSE) (electronics) - precautionary measures
MW 18x1.5 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 5.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 4.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 3.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 2.5 cm |
| Remote | 50 Gs (5.0 mT) | 2.5 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 18x1.5 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
19.19 km/h
(5.33 m/s)
|
0.04 J | |
| 30 mm |
31.85 km/h
(8.85 m/s)
|
0.11 J | |
| 50 mm |
41.10 km/h
(11.42 m/s)
|
0.19 J | |
| 100 mm |
58.12 km/h
(16.15 m/s)
|
0.37 J |
Table 9: Surface protection spec
MW 18x1.5 / 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 18x1.5 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 3 519 Mx | 35.2 µWb |
| Pc Coefficient | 0.13 | Low (Flat) |
Table 11: Physics of underwater searching
MW 18x1.5 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.95 kg | Standard |
| Water (riverbed) |
1.09 kg
(+0.14 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Note: On a vertical surface, the magnet holds only ~20% of its max power.
2. Steel thickness impact
*Thin steel (e.g. computer case) drastically limits the holding force.
3. Heat tolerance
*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) = 0.13
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 |
Check out also offers
Advantages as well as disadvantages of rare earth magnets.
Pros
- They retain magnetic properties for nearly ten years – the loss is just ~1% (in theory),
- They are noted for resistance to demagnetization induced by external disturbances,
- By using a lustrous layer of silver, the element gains an proper look,
- Neodymium magnets generate maximum magnetic induction on a contact point, which allows for strong attraction,
- Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
- Possibility of exact modeling and adapting to concrete conditions,
- Wide application in modern industrial fields – they find application in mass storage devices, electric motors, medical devices, also modern systems.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which makes them useful in miniature devices
Cons
- Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a strong case, which not only protects them against impacts but also increases their durability
- When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their strength 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 advise using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
- Due to limitations in creating threads and complex shapes in magnets, we propose using casing - magnetic holder.
- Health risk resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child health protection. It is also worth noting that tiny parts of these products can complicate diagnosis medical when they are in the body.
- With mass production the cost of neodymium magnets can be a barrier,
Holding force characteristics
Breakaway strength of the magnet in ideal conditions – what affects it?
- with the application of a yoke made of special test steel, ensuring full magnetic saturation
- whose transverse dimension reaches at least 10 mm
- with a surface free of scratches
- without the slightest insulating layer between the magnet and steel
- for force applied at a right angle (in the magnet axis)
- in stable room temperature
Lifting capacity in real conditions – factors
- Clearance – existence of foreign body (rust, dirt, gap) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
- Angle of force application – highest force is reached only during pulling at a 90° angle. The shear force of the magnet along the surface is standardly several times lower (approx. 1/5 of the lifting capacity).
- Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
- Chemical composition of the base – mild steel attracts best. Alloy admixtures decrease magnetic properties and lifting capacity.
- Plate texture – ground elements ensure maximum contact, which improves force. Uneven metal weaken the grip.
- Thermal factor – hot environment reduces magnetic field. Exceeding the limit temperature can permanently damage the magnet.
Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under perpendicular forces, in contrast under parallel forces the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate reduces the lifting capacity.
Safety rules for work with NdFeB magnets
Maximum temperature
Regular neodymium magnets (N-type) lose magnetization when the temperature goes above 80°C. Damage is permanent.
Shattering risk
Watch out for shards. Magnets can explode upon uncontrolled impact, launching shards into the air. We recommend safety glasses.
Magnetic media
Powerful magnetic fields can destroy records on payment cards, HDDs, and storage devices. Stay away of min. 10 cm.
Magnetic interference
Navigation devices and smartphones are extremely sensitive to magnetic fields. Close proximity with a strong magnet can permanently damage the sensors in your phone.
Do not drill into magnets
Dust produced during grinding of magnets is combustible. Avoid drilling into magnets unless you are an expert.
Crushing force
Danger of trauma: The pulling power is so great that it can cause hematomas, crushing, and even bone fractures. Protective gloves are recommended.
Handling rules
Use magnets consciously. Their powerful strength can shock even experienced users. Plan your moves and respect their force.
Product not for children
Product intended for adults. Small elements can be swallowed, causing intestinal necrosis. Store away from kids and pets.
Sensitization to coating
Allergy Notice: The Ni-Cu-Ni coating contains nickel. If redness appears, immediately stop working with magnets and use protective gear.
Medical interference
Individuals with a ICD have to maintain an safe separation from magnets. The magnetism can disrupt the operation of the implant.
