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MW 12x1.5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010442

GTIN/EAN: 5906301811114

5.00

Diameter Ø

12 mm [±0,1 mm]

Height

1.5 mm [±0,1 mm]

Weight

1.27 g

Magnetization Direction

↑ axial

Load capacity

0.87 kg / 8.51 N

Magnetic Induction

150.32 mT / 1503 Gs

Coating

[NiCuNi] Nickel

product parameters »

0.431 ZŁ with VAT / pcs + price for transport

0.350 ZŁ net + 23% VAT / pcs

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Technical parameters - MW 12x1.5 / N38 - cylindrical magnet

Specification / characteristics - MW 12x1.5 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010442
GTIN/EAN 5906301811114
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Diameter Ø 12 mm [±0,1 mm]
Height 1.5 mm [±0,1 mm]
Weight 1.27 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.87 kg / 8.51 N
Magnetic Induction ~ ? 150.32 mT / 1503 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 12x1.5 / N38 - cylindrical magnet
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

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 information constitute the outcome of a physical analysis. Values were calculated on algorithms for the class Nd2Fe14B. Real-world performance might slightly differ. Treat these calculations as a reference point when designing systems.

Table 1: Static pull force (force vs distance) - interaction chart
MW 12x1.5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1503 Gs
150.3 mT
 0.87 kg / 1.92 LBS
870.0 g / 8.5 N
 safe
1 mm 1365 Gs
136.5 mT
 0.72 kg / 1.58 LBS
718.1 g / 7.0 N
 safe
2 mm 1163 Gs
116.3 mT
 0.52 kg / 1.15 LBS
521.4 g / 5.1 N
 safe
3 mm 947 Gs
94.7 mT
 0.35 kg / 0.76 LBS
345.7 g / 3.4 N
 safe
5 mm 587 Gs
58.7 mT
 0.13 kg / 0.29 LBS
132.6 g / 1.3 N
 safe
10 mm 180 Gs
18.0 mT
 0.01 kg / 0.03 LBS
12.5 g / 0.1 N
 safe
15 mm 70 Gs
7.0 mT
 0.00 kg / 0.00 LBS
1.9 g / 0.0 N
 safe
20 mm 33 Gs
3.3 mT
 0.00 kg / 0.00 LBS
0.4 g / 0.0 N
 safe
30 mm 11 Gs
1.1 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
Pulling power weakens significantly with every mm of gap. Keep in mind that even a very thin break (e.g., contamination, varnish, rust) noticeably weakens the grip. Neodymiums operate most effectively at the point of direct contact; gap kills the power. Notice how flashily the parameters drop, when the magnet does not touch directly to the steel surface. When planning the assembly, eliminate additional spacers.

Table 2: Shear capacity (vertical surface)
MW 12x1.5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.17 kg / 0.38 LBS
174.0 g / 1.7 N
1 mm Stal (~0.2) 0.14 kg / 0.32 LBS
144.0 g / 1.4 N
2 mm Stal (~0.2) 0.10 kg / 0.23 LBS
104.0 g / 1.0 N
3 mm Stal (~0.2) 0.07 kg / 0.15 LBS
70.0 g / 0.7 N
5 mm Stal (~0.2) 0.03 kg / 0.06 LBS
26.0 g / 0.3 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
The table below shows the estimated force needed to initiate the slippage of the magnet downwards along a upright steel plate (considering typical friction coefficient). This value varies with the air gap between the magnet and the metal.

Table 3: Vertical assembly (sliding) - vertical pull
MW 12x1.5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.26 kg / 0.58 LBS
261.0 g / 2.6 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.17 kg / 0.38 LBS
174.0 g / 1.7 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.09 kg / 0.19 LBS
87.0 g / 0.9 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.44 kg / 0.96 LBS
435.0 g / 4.3 N
When hanging a holder on a upright surface (e.g., a board), it you can count on just approx. 20%-30% of its maximum pull force. Gravitational force as well as a weak degree of grip cause that holders slip faster than they pop off the substrate. Designing a hanger? Note that the shear force is noticeably lower than the maximum static pull force. On a slippery surface, the element will slide down under a significantly smaller weight. Application of an anti-slip coating can significantly increase the grip.

Table 4: Material efficiency (saturation) - sheet metal selection
MW 12x1.5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.09 kg / 0.19 LBS
87.0 g / 0.9 N
1 mm
25%
 0.22 kg / 0.48 LBS
217.5 g / 2.1 N
2 mm
50%
 0.44 kg / 0.96 LBS
435.0 g / 4.3 N
3 mm
75%
 0.65 kg / 1.44 LBS
652.5 g / 6.4 N
5 mm
100%
 0.87 kg / 1.92 LBS
870.0 g / 8.5 N
10 mm
100%
 0.87 kg / 1.92 LBS
870.0 g / 8.5 N
11 mm
100%
 0.87 kg / 1.92 LBS
870.0 g / 8.5 N
12 mm
100%
 0.87 kg / 1.92 LBS
870.0 g / 8.5 N
A thin metal plate is unable to focus the full magnetic flux, which weakens actual performance of the holder. If you attach a powerful product to a weak sheet, the field will penetrate right through and the attraction force will be weaker. To utilize full efficiency of this neodymium's power, you need a suitably thick backing of metal. The material oversaturation means that on delicate walls (e.g., thin profiles), the product holds weaker. We advise picking the steel thickness based on the following data.

Table 5: Working in heat (stability) - power drop
MW 12x1.5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.87 kg / 1.92 LBS
870.0 g / 8.5 N
 OK
40 °C -2.2% 0.85 kg / 1.88 LBS
850.9 g / 8.3 N
 OK
60 °C -4.4% 0.83 kg / 1.83 LBS
831.7 g / 8.2 N
80 °C -6.6% 0.81 kg / 1.79 LBS
812.6 g / 8.0 N
100 °C -28.8% 0.62 kg / 1.37 LBS
619.4 g / 6.1 N
Ordinary NdFeB products change their properties power past the thermal threshold. Protect against heat – excessive heat can irreversibly destroy this magnet. With every degree above norm, the neodymium's force briefly drops. Avoid using this magnet close to ovens higher than its working range. Ignoring the limit will result in irreversible degradation of magnetic properties.
*Technical advisory: Temperature resistance is determined by both grade, and the Permeance Coefficient Pc. Thin magnets (low Pc) risk losing magnetic properties at lower temperatures than taller cylinders. The danger warning in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (attraction) - field collision
MW 12x1.5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 1.57 kg / 3.47 LBS
2 770 Gs
0.24 kg / 0.52 LBS
236 g / 2.3 N
 N/A
1 mm 1.46 kg / 3.21 LBS
2 891 Gs
0.22 kg / 0.48 LBS
219 g / 2.1 N
 1.31 kg / 2.89 LBS
~0 Gs
2 mm 1.30 kg / 2.87 LBS
2 731 Gs
0.19 kg / 0.43 LBS
195 g / 1.9 N
 1.17 kg / 2.58 LBS
~0 Gs
3 mm 1.12 kg / 2.48 LBS
2 538 Gs
0.17 kg / 0.37 LBS
168 g / 1.7 N
 1.01 kg / 2.23 LBS
~0 Gs
5 mm 0.78 kg / 1.71 LBS
2 109 Gs
0.12 kg / 0.26 LBS
116 g / 1.1 N
 0.70 kg / 1.54 LBS
~0 Gs
10 mm 0.24 kg / 0.53 LBS
1 173 Gs
0.04 kg / 0.08 LBS
36 g / 0.4 N
 0.22 kg / 0.48 LBS
~0 Gs
20 mm 0.02 kg / 0.05 LBS
361 Gs
0.00 kg / 0.01 LBS
3 g / 0.0 N
 0.02 kg / 0.05 LBS
~0 Gs
50 mm 0.00 kg / 0.00 LBS
36 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
22 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
14 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
Two strong neodymiums interact from a wider radius than a magnet and steel setup. Such a system of magnet-to-magnet produces a massive flux and a larger range of action. Want to build a powerful holder? Apply two magnets instead of a neodymium and a striker plate. Remember that when attracting two neodymiums, the impact force is huge. The repulsion force is marginally weaker than the connection force, but still impressive.
*The magnetic induction in repulsion mode is approximately ~0 Gs at the geometric center between the magnets (due to field cancellation).
Important: Calculations apply to shear force of two matching magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Protective zones (implants) - warnings
MW 12x1.5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 4.0 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
Car key 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) 0.5 cm
Powerful magnet radiation is a large risk to electronic devices as well as medical implants. These NdFeB products generate a field that prevents correct functioning of digital equipment. Remember: the unseen radiation passes through tissues and housings. Increased vigilance must be taken by people with cochlear implants and insulin pumps. The risk also applies to: automatic timepieces, remotes, membranes, and screens. Avoid contact with magnetic cards, hard drives, or sensitive navigation tools.

Table 8: Impact energy (cracking risk) - collision effects
MW 12x1.5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 26.63 km/h
(7.40 m/s)
 0.03 J
30 mm 45.72 km/h
(12.70 m/s)
 0.10 J
50 mm 59.02 km/h
(16.40 m/s)
 0.17 J
100 mm 83.47 km/h
(23.19 m/s)
 0.34 J
NdFeB products are prone to chipping – a violent impact against metal causes immediate chipping. Pay attention to connection velocity – a neodymium left loose becomes dangerous. Impact energy can destroy the magnet or painful pinches to skin. Hold the magnet firmly during bringing near metal so it doesn't slam with momentum against the metal. A contact at a velocity of dozens of km/h ends with a crack of the neodymium. Wear eye protection when playing with large magnets.

Table 9: Surface protection spec
MW 12x1.5 / 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)
The SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Construction data (Flux)
MW 12x1.5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 2 159 Mx 21.6 µWb
Pc Coefficient 0.19 Low (Flat)
Flux value emitted by the pole surface. Key data in coil applications and motors. Pc value determines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MW 12x1.5 / N38

Environment Effective steel pull Effect
Air (land) 0.87 kg Standard
Water (riverbed) 1.00 kg
(+0.13 kg buoyancy gain)
+14.5%
Rust risk: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
Water displaces steel, making heavy objects slightly lighter. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.
1. Sliding resistance

*Warning: On a vertical surface, the magnet holds only ~20% of its max power.

2. Efficiency vs thickness

*Thin steel (e.g. computer case) severely weakens the holding force.

3. Thermal stability

*For N38 grade, the safety limit is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.19

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.

Technical and environmental data
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%
Ecology and recycling (GPSR)
recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 010442-2026
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This product is an exceptionally strong cylinder magnet, composed of modern NdFeB material, which, at dimensions of Ø12x1.5 mm, guarantees the highest energy density. This specific item features high dimensional repeatability and professional build quality, making it a perfect solution for the most demanding engineers and designers. As a magnetic rod with significant force (approx. 0.87 kg), this product is in stock from our warehouse in Poland, ensuring quick order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
It successfully proves itself in modeling, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power of 8.51 N with a weight of only 1.27 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.
Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 12.1 mm) using two-component epoxy glues. To ensure long-term durability in industry, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø12x1.5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.
This model is characterized by dimensions Ø12x1.5 mm, which, at a weight of 1.27 g, makes it an element with impressive magnetic energy density. The key parameter here is the holding force amounting to approximately 0.87 kg (force ~8.51 N), which, with such defined dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against oxidation, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 1.5 mm), which means that the N and S poles are located on the flat, circular surfaces. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized through the diameter if your project requires it.

Pros and cons of Nd2Fe14B magnets.

Pros

Besides their high retention, neodymium magnets are valued for these benefits:
  • They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
  • Magnets perfectly defend themselves against loss of magnetization caused by foreign field sources,
  • The use of an shiny layer of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • Magnets are characterized by extremely high magnetic induction on the active area,
  • 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 accurate shaping and adapting to defined requirements,
  • Wide application in modern technologies – they are commonly used in mass storage devices, brushless drives, diagnostic systems, also technologically advanced constructions.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Limitations

Disadvantages of NdFeB magnets:
  • To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
  • Neodymium magnets lose 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 stability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • We suggest cover - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complicated forms.
  • Possible danger resulting from small fragments of magnets are risky, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that small elements of these magnets can disrupt the diagnostic process medical when they are in the body.
  • With large orders the cost of neodymium magnets can be a barrier,

Pull force analysis

Highest magnetic holding force – what it depends on?

Information about lifting capacity is the result of a measurement for the most favorable conditions, taking into account:
  • with the contact of a yoke made of special test steel, ensuring full magnetic saturation
  • possessing a massiveness of minimum 10 mm to ensure full flux closure
  • characterized by lack of roughness
  • under conditions of gap-free contact (metal-to-metal)
  • under axial application of breakaway force (90-degree angle)
  • at temperature room level

Lifting capacity in practice – influencing factors

Please note that the working load may be lower depending on the following factors, in order of importance:
  • Gap (between the magnet and the plate), because even a very small distance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to paint, rust or dirt).
  • Force direction – note that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
  • Metal type – different alloys attracts identically. Alloy additives weaken the interaction with the magnet.
  • Surface structure – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Roughness creates an air distance.
  • Thermal factor – hot environment weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.

Lifting capacity testing was carried out on a smooth plate of optimal thickness, under a perpendicular pulling force, however under parallel forces the holding force is lower. Moreover, even a minimal clearance between the magnet and the plate decreases the lifting capacity.

Precautions when working with neodymium magnets
Allergy Warning

Some people have a sensitization to Ni, which is the common plating for NdFeB magnets. Frequent touching can result in skin redness. We suggest use protective gloves.

Operating temperature

Monitor thermal conditions. Heating the magnet to high heat will permanently weaken its properties and pulling force.

Choking Hazard

Neodymium magnets are not suitable for play. Eating multiple magnets can lead to them attracting across intestines, which constitutes a severe health hazard and necessitates immediate surgery.

GPS Danger

Be aware: neodymium magnets generate a field that confuses sensitive sensors. Maintain a separation from your phone, tablet, and navigation systems.

Warning for heart patients

Warning for patients: Powerful magnets disrupt medical devices. Keep minimum 30 cm distance or ask another person to handle the magnets.

Electronic devices

Do not bring magnets close to a purse, laptop, or screen. The magnetic field can destroy these devices and erase data from cards.

Flammability

Mechanical processing of NdFeB material poses a fire risk. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Respect the power

Before use, read the rules. Sudden snapping can break the magnet or injure your hand. Think ahead.

Physical harm

Mind your fingers. Two powerful magnets will join instantly with a force of several hundred kilograms, crushing anything in their path. Be careful!

Magnet fragility

NdFeB magnets are ceramic materials, meaning they are prone to chipping. Impact of two magnets will cause them breaking into small pieces.

Caution! More info about risks in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98