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MW 12x1 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010015

GTIN/EAN: 5906301810148

5.00

Diameter Ø

12 mm [±0,1 mm]

Height

1 mm [±0,1 mm]

Weight

0.85 g

Magnetization Direction

↑ axial

Load capacity

0.42 kg / 4.15 N

Magnetic Induction

101.90 mT / 1019 Gs

Coating

[NiCuNi] Nickel

0.578 with VAT / pcs + price for transport

0.470 ZŁ net + 23% VAT / pcs

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Technical of the product - MW 12x1 / N38 - cylindrical magnet

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

properties
properties values
Cat. no. 010015
GTIN/EAN 5906301810148
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 mm [±0,1 mm]
Weight 0.85 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.42 kg / 4.15 N
Magnetic Induction ~ ? 101.90 mT / 1019 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 12x1 / 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 modeling of the magnet - data

The following data constitute the result of a engineering calculation. Values rely on models for the material Nd2Fe14B. Operational parameters might slightly differ from theoretical values. Use these calculations as a supplementary guide when designing systems.

Table 1: Static pull force (force vs gap) - power drop
MW 12x1 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1019 Gs
101.9 mT
0.42 kg / 0.93 lbs
420.0 g / 4.1 N
low risk
1 mm 941 Gs
94.1 mT
0.36 kg / 0.79 lbs
358.5 g / 3.5 N
low risk
2 mm 812 Gs
81.2 mT
0.27 kg / 0.59 lbs
266.8 g / 2.6 N
low risk
3 mm 666 Gs
66.6 mT
0.18 kg / 0.40 lbs
179.7 g / 1.8 N
low risk
5 mm 415 Gs
41.5 mT
0.07 kg / 0.15 lbs
69.7 g / 0.7 N
low risk
10 mm 126 Gs
12.6 mT
0.01 kg / 0.01 lbs
6.5 g / 0.1 N
low risk
15 mm 49 Gs
4.9 mT
0.00 kg / 0.00 lbs
1.0 g / 0.0 N
low risk
20 mm 23 Gs
2.3 mT
0.00 kg / 0.00 lbs
0.2 g / 0.0 N
low risk
30 mm 7 Gs
0.7 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
low risk
50 mm 2 Gs
0.2 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
low risk

Table 2: Slippage hold (vertical surface)
MW 12x1 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.08 kg / 0.19 lbs
84.0 g / 0.8 N
1 mm Stal (~0.2) 0.07 kg / 0.16 lbs
72.0 g / 0.7 N
2 mm Stal (~0.2) 0.05 kg / 0.12 lbs
54.0 g / 0.5 N
3 mm Stal (~0.2) 0.04 kg / 0.08 lbs
36.0 g / 0.4 N
5 mm Stal (~0.2) 0.01 kg / 0.03 lbs
14.0 g / 0.1 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: Vertical assembly (sliding) - vertical pull
MW 12x1 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.13 kg / 0.28 lbs
126.0 g / 1.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.08 kg / 0.19 lbs
84.0 g / 0.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.04 kg / 0.09 lbs
42.0 g / 0.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.21 kg / 0.46 lbs
210.0 g / 2.1 N

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 12x1 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.04 kg / 0.09 lbs
42.0 g / 0.4 N
1 mm
25%
0.11 kg / 0.23 lbs
105.0 g / 1.0 N
2 mm
50%
0.21 kg / 0.46 lbs
210.0 g / 2.1 N
3 mm
75%
0.32 kg / 0.69 lbs
315.0 g / 3.1 N
5 mm
100%
0.42 kg / 0.93 lbs
420.0 g / 4.1 N
10 mm
100%
0.42 kg / 0.93 lbs
420.0 g / 4.1 N
11 mm
100%
0.42 kg / 0.93 lbs
420.0 g / 4.1 N
12 mm
100%
0.42 kg / 0.93 lbs
420.0 g / 4.1 N

Table 5: Thermal resistance (material behavior) - resistance threshold
MW 12x1 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.42 kg / 0.93 lbs
420.0 g / 4.1 N
OK
40 °C -2.2% 0.41 kg / 0.91 lbs
410.8 g / 4.0 N
OK
60 °C -4.4% 0.40 kg / 0.89 lbs
401.5 g / 3.9 N
80 °C -6.6% 0.39 kg / 0.86 lbs
392.3 g / 3.8 N
100 °C -28.8% 0.30 kg / 0.66 lbs
299.0 g / 2.9 N

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

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 0.72 kg / 1.60 lbs
1 959 Gs
0.11 kg / 0.24 lbs
109 g / 1.1 N
N/A
1 mm 0.68 kg / 1.50 lbs
1 978 Gs
0.10 kg / 0.23 lbs
102 g / 1.0 N
0.61 kg / 1.35 lbs
~0 Gs
2 mm 0.62 kg / 1.36 lbs
1 883 Gs
0.09 kg / 0.20 lbs
93 g / 0.9 N
0.56 kg / 1.23 lbs
~0 Gs
3 mm 0.54 kg / 1.19 lbs
1 762 Gs
0.08 kg / 0.18 lbs
81 g / 0.8 N
0.49 kg / 1.07 lbs
~0 Gs
5 mm 0.38 kg / 0.84 lbs
1 479 Gs
0.06 kg / 0.13 lbs
57 g / 0.6 N
0.34 kg / 0.76 lbs
~0 Gs
10 mm 0.12 kg / 0.26 lbs
830 Gs
0.02 kg / 0.04 lbs
18 g / 0.2 N
0.11 kg / 0.24 lbs
~0 Gs
20 mm 0.01 kg / 0.02 lbs
253 Gs
0.00 kg / 0.00 lbs
2 g / 0.0 N
0.01 kg / 0.02 lbs
~0 Gs
50 mm 0.00 kg / 0.00 lbs
25 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
15 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
10 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
7 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
5 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
3 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Safety (HSE) (electronics) - precautionary measures
MW 12x1 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 3.5 cm
Hearing aid 10 Gs (1.0 mT) 3.0 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) 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: Impact energy (cracking risk) - warning
MW 12x1 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.63 km/h
(6.29 m/s)
0.02 J
30 mm 38.83 km/h
(10.79 m/s)
0.05 J
50 mm 50.13 km/h
(13.92 m/s)
0.08 J
100 mm 70.89 km/h
(19.69 m/s)
0.16 J

Table 9: Coating parameters (durability)
MW 12x1 / 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 (Pc)
MW 12x1 / N38

Parameter Value SI Unit / Description
Magnetic Flux 1 564 Mx 15.6 µWb
Pc Coefficient 0.13 Low (Flat)

Table 11: Underwater work (magnet fishing)
MW 12x1 / N38

Environment Effective steel pull Effect
Air (land) 0.42 kg Standard
Water (riverbed) 0.48 kg
(+0.06 kg buoyancy gain)
+14.5%
Corrosion warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Wall mount (shear)

*Caution: On a vertical surface, the magnet holds only ~20% of its nominal pull.

2. Steel thickness impact

*Thin metal sheet (e.g. computer case) drastically weakens the holding force.

3. Power loss vs temp

*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) = 0.13

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 specification and ecology
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
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: 010015-2026
Magnet Unit Converter
Force (pull)

Field Strength

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This product is an exceptionally strong rod magnet, composed of advanced NdFeB material, which, with dimensions of Ø12x1 mm, guarantees maximum efficiency. The MW 12x1 / N38 model features an accuracy of ±0.1mm and professional build quality, making it an ideal solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 0.42 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Moreover, its Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
This model is ideal for building electric motors, advanced sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the high power of 4.15 N with a weight of only 0.85 g, this rod is indispensable in electronics 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 epoxy glues. To ensure long-term durability in automation, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most frequently chosen standard for industrial neodymium magnets, offering a great economic balance and operational stability. If you need the strongest magnets in the same volume (Ø12x1), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.
This model is characterized by dimensions Ø12x1 mm, which, at a weight of 0.85 g, makes it an element with high magnetic energy density. The value of 4.15 N means that the magnet is capable of holding a weight many times exceeding its own mass of 0.85 g. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 1 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 diametrically if your project requires it.

Strengths as well as weaknesses of neodymium magnets.

Strengths

Besides their remarkable field intensity, neodymium magnets offer the following advantages:
  • Their power is maintained, and after around ten years it decreases only by ~1% (theoretically),
  • They are resistant to demagnetization induced by external magnetic fields,
  • A magnet with a shiny silver surface has better aesthetics,
  • Magnetic induction on the surface of the magnet turns out to be impressive,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Possibility of accurate creating and adapting to individual applications,
  • Huge importance in electronics industry – they are commonly used in computer drives, electric motors, precision medical tools, and complex engineering applications.
  • Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,

Limitations

What to avoid - cons of neodymium magnets: application proposals
  • Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a strong case, which not only protects them against impacts but also raises their durability
  • Neodymium magnets decrease their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
  • Due to limitations in realizing nuts and complex shapes in magnets, we propose using a housing - magnetic mount.
  • Possible danger related to microscopic parts of magnets are risky, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, tiny parts of these magnets are able to be problematic in diagnostics medical after entering the body.
  • With budget limitations the cost of neodymium magnets is a challenge,

Pull force analysis

Highest magnetic holding forcewhat it depends on?

The load parameter shown concerns the peak performance, recorded under optimal environment, specifically:
  • using a plate made of low-carbon steel, serving as a magnetic yoke
  • whose transverse dimension equals approx. 10 mm
  • with an polished touching surface
  • under conditions of gap-free contact (metal-to-metal)
  • for force acting at a right angle (in the magnet axis)
  • at conditions approx. 20°C

Determinants of practical lifting force of a magnet

In practice, the real power is determined by a number of factors, listed from the most important:
  • Gap between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by veneer or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Load vector – highest force is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the plate is standardly several times lower (approx. 1/5 of the lifting capacity).
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of converting into lifting capacity.
  • Material composition – different alloys reacts the same. Alloy additives weaken the interaction with the magnet.
  • Plate texture – ground elements ensure maximum contact, which increases field saturation. Rough surfaces reduce efficiency.
  • Thermal environment – heating the magnet results in weakening of induction. It is worth remembering the thermal limit for a given model.

Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under shearing force the load capacity is reduced by as much as 75%. Additionally, even a slight gap between the magnet’s surface and the plate decreases the holding force.

Safety rules for work with neodymium magnets
Beware of splinters

Beware of splinters. Magnets can explode upon violent connection, ejecting shards into the air. Wear goggles.

Protect data

Data protection: Strong magnets can ruin payment cards and sensitive devices (heart implants, medical aids, mechanical watches).

Bodily injuries

Danger of trauma: The pulling power is so great that it can cause blood blisters, crushing, and broken bones. Protective gloves are recommended.

Life threat

Patients with a pacemaker have to maintain an absolute distance from magnets. The magnetic field can disrupt the functioning of the life-saving device.

Operating temperature

Do not overheat. Neodymium magnets are sensitive to heat. If you need resistance above 80°C, inquire about special high-temperature series (H, SH, UH).

GPS and phone interference

Be aware: neodymium magnets generate a field that disrupts sensitive sensors. Maintain a separation from your mobile, tablet, and GPS.

Dust is flammable

Fire hazard: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this may cause fire.

Adults only

Absolutely keep magnets out of reach of children. Ingestion danger is significant, and the consequences of magnets connecting inside the body are fatal.

Powerful field

Use magnets consciously. Their immense force can surprise even experienced users. Be vigilant and respect their force.

Skin irritation risks

A percentage of the population experience a sensitization to Ni, which is the standard coating for NdFeB magnets. Extended handling might lead to an allergic reaction. We recommend use safety gloves.

Danger! Need more info? Check our post: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98