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MW 16x3 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010033

GTIN/EAN: 5906301810322

5.00
Load capacity 2.97 kg / 29.13 N Magnetic Induction 217.61 mT / 2176 Gs
Diameter Ø
16 mm [±0,1 mm]
Height
3 mm [±0,1 mm]
Weight
4.52 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

1.550 zł net / pcs

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price from 400 pcs
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Frequently asked questions

Where can I buy strong cylindrical neodymium magnets?
See the available cylinders in the DHIT catalogue. Compare dimensions, grade and the pull-force value on each product card; grade alone does not determine the pull force of a finished magnet.
Can a small cylindrical magnet provide a strong grip for precise workshop work?
Yes, but size alone is not enough to predict the result. Geometry, the steel surface and the direction of load affect the grip. Compare the specifications of the selected dimensions on their product cards.
Which cylindrical magnet can work at a higher temperature?
Check the operating-temperature limit of the particular model rather than assuming one limit for all N grades. The offered N52 models are rated up to 60°C. For hotter applications, ask for a product with a confirmed specification for the actual working temperature.

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

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Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Technical specification - MW 16x3 / N38 - cylindrical magnet

Specification / characteristics - MW 16x3 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010033
GTIN/EAN 5906301810322
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 16 mm [±0,1 mm]
Height 3 mm [±0,1 mm]
Weight 4.52 g
Magnetization Direction ↑ axial
Load capacity ~ ? 2.97 kg / 29.13 N
Magnetic Induction ~ ? 217.61 mT / 2176 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 16x3 / N38 - cylindrical magnet
properties values units
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working 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 310 °C
Curie Temperature TF 590 °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 modeling of the product - data

These information are the direct effect of a engineering simulation. Results were calculated on models for the material Nd2Fe14B. Real-world conditions might slightly deviate from the simulation results. Use these data as a preliminary roadmap when designing systems.

Table 1: Static pull force (force vs gap) - interaction chart
MW 16x3 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2176 Gs
217.6 mT
2.97 kg / 6.55 lbs
2970.0 g / 29.1 N
strong
1 mm 2004 Gs
200.4 mT
2.52 kg / 5.55 lbs
2519.3 g / 24.7 N
strong
2 mm 1782 Gs
178.2 mT
1.99 kg / 4.39 lbs
1993.2 g / 19.6 N
weak grip
3 mm 1543 Gs
154.3 mT
1.49 kg / 3.29 lbs
1494.0 g / 14.7 N
weak grip
5 mm 1098 Gs
109.8 mT
0.76 kg / 1.67 lbs
756.6 g / 7.4 N
weak grip
10 mm 439 Gs
43.9 mT
0.12 kg / 0.27 lbs
120.9 g / 1.2 N
weak grip
15 mm 195 Gs
19.5 mT
0.02 kg / 0.05 lbs
23.9 g / 0.2 N
weak grip
20 mm 99 Gs
9.9 mT
0.01 kg / 0.01 lbs
6.2 g / 0.1 N
weak grip
30 mm 35 Gs
3.5 mT
0.00 kg / 0.00 lbs
0.8 g / 0.0 N
weak grip
50 mm 8 Gs
0.8 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip

Table 2: Shear capacity (vertical surface)
MW 16x3 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.59 kg / 1.31 lbs
594.0 g / 5.8 N
1 mm Stal (~0.2) 0.50 kg / 1.11 lbs
504.0 g / 4.9 N
2 mm Stal (~0.2) 0.40 kg / 0.88 lbs
398.0 g / 3.9 N
3 mm Stal (~0.2) 0.30 kg / 0.66 lbs
298.0 g / 2.9 N
5 mm Stal (~0.2) 0.15 kg / 0.34 lbs
152.0 g / 1.5 N
10 mm Stal (~0.2) 0.02 kg / 0.05 lbs
24.0 g / 0.2 N
15 mm Stal (~0.2) 0.00 kg / 0.01 lbs
4.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 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 (sliding) - vertical pull
MW 16x3 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.89 kg / 1.96 lbs
891.0 g / 8.7 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.59 kg / 1.31 lbs
594.0 g / 5.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.30 kg / 0.65 lbs
297.0 g / 2.9 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.49 kg / 3.27 lbs
1485.0 g / 14.6 N

Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 16x3 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.30 kg / 0.65 lbs
297.0 g / 2.9 N
1 mm
25%
0.74 kg / 1.64 lbs
742.5 g / 7.3 N
2 mm
50%
1.49 kg / 3.27 lbs
1485.0 g / 14.6 N
3 mm
75%
2.23 kg / 4.91 lbs
2227.5 g / 21.9 N
5 mm
100%
2.97 kg / 6.55 lbs
2970.0 g / 29.1 N
10 mm
100%
2.97 kg / 6.55 lbs
2970.0 g / 29.1 N
11 mm
100%
2.97 kg / 6.55 lbs
2970.0 g / 29.1 N
12 mm
100%
2.97 kg / 6.55 lbs
2970.0 g / 29.1 N

Table 5: Thermal stability (stability) - thermal limit
MW 16x3 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 2.97 kg / 6.55 lbs
2970.0 g / 29.1 N
OK
40 °C -2.2% 2.90 kg / 6.40 lbs
2904.7 g / 28.5 N
OK
60 °C -4.4% 2.84 kg / 6.26 lbs
2839.3 g / 27.9 N
80 °C -6.6% 2.77 kg / 6.12 lbs
2774.0 g / 27.2 N
100 °C -28.8% 2.11 kg / 4.66 lbs
2114.6 g / 20.7 N

Table 6: Two magnets (repulsion) - field range
MW 16x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 5.87 kg / 12.93 lbs
3 716 Gs
0.88 kg / 1.94 lbs
880 g / 8.6 N
N/A
1 mm 5.46 kg / 12.03 lbs
4 197 Gs
0.82 kg / 1.80 lbs
819 g / 8.0 N
4.91 kg / 10.83 lbs
~0 Gs
2 mm 4.98 kg / 10.97 lbs
4 007 Gs
0.75 kg / 1.65 lbs
746 g / 7.3 N
4.48 kg / 9.87 lbs
~0 Gs
3 mm 4.46 kg / 9.83 lbs
3 794 Gs
0.67 kg / 1.48 lbs
669 g / 6.6 N
4.01 kg / 8.85 lbs
~0 Gs
5 mm 3.43 kg / 7.56 lbs
3 326 Gs
0.51 kg / 1.13 lbs
514 g / 5.0 N
3.09 kg / 6.80 lbs
~0 Gs
10 mm 1.49 kg / 3.30 lbs
2 196 Gs
0.22 kg / 0.49 lbs
224 g / 2.2 N
1.35 kg / 2.97 lbs
~0 Gs
20 mm 0.24 kg / 0.53 lbs
878 Gs
0.04 kg / 0.08 lbs
36 g / 0.4 N
0.21 kg / 0.47 lbs
~0 Gs
50 mm 0.00 kg / 0.01 lbs
113 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
60 mm 0.00 kg / 0.00 lbs
70 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
46 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
32 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
23 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
17 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 16x3 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 6.0 cm
Hearing aid 10 Gs (1.0 mT) 5.0 cm
Timepiece 20 Gs (2.0 mT) 4.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 3.0 cm
Car key 50 Gs (5.0 mT) 3.0 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Dynamics (kinetic energy) - warning
MW 16x3 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 24.50 km/h
(6.80 m/s)
0.10 J
30 mm 24.93 km/h
(6.92 m/s)
0.11 J
50 mm 24.93 km/h
(6.93 m/s)
0.11 J
100 mm 24.94 km/h
(6.93 m/s)
0.11 J

Table 9: Anti-corrosion coating durability
MW 16x3 / 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 16x3 / N38

Parameter Value SI Unit / Description
Magnetic Flux 5 141 Mx 51.4 µWb
Pc Coefficient 0.27 Low (Flat)

Table 11: Physics of underwater searching
MW 16x3 / N38

Environment Effective steel pull Effect
Air (land) 2.97 kg Standard
Water (riverbed) 3.40 kg
(+0.43 kg buoyancy gain)
+14.5%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.

1. Wall mount (shear)

*Note: On a vertical surface, the magnet holds merely a fraction of its max power.

2. Efficiency vs thickness

*Thin steel (e.g. 0.5mm PC case) drastically weakens the holding force.

3. Temperature resistance

N38: the maximum material working temperature is 80°C. Permitted conditions also depend on the shape and magnetic circuit.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.27

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.

Technical specification and ecology

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: 010033-2026
Quick Unit Converter

Force (pull)


Magnetic Induction

Other offers

The offered product is an exceptionally strong rod magnet, produced from durable NdFeB material, which, at dimensions of Ø16x3 mm, guarantees maximum efficiency. The MW 16x3 / N38 model features an accuracy of ±0.1mm and industrial build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 2.97 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 typical operating conditions, ensuring an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 29.11 N with a weight of only 4.52 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.
Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks chipping the coating of this precision component. To ensure long-term durability in industry, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Choose the material grade together with the dimensions and working conditions. A grade designation alone does not determine the pull force of the finished magnet. Check the properties and working temperature of this specific model on its product card; contact us before ordering for an unusual application.
The presented product is a neodymium magnet with precisely defined parameters: diameter 16 mm and height 3 mm. The value of 29.11 N means that the magnet is capable of holding a weight many times exceeding its own mass of 4.52 g. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.
Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 16 mm. Such an arrangement is standard when connecting magnets in stacks (e.g., in filters) or when mounting in sockets at the bottom of a hole. On request, we can also produce versions magnetized through the diameter if your project requires it.

Strengths as well as weaknesses of neodymium magnets.

Advantages

Besides their remarkable field intensity, neodymium magnets offer the following advantages:
  • Their strength is maintained, and after approximately 10 years it decreases only by ~1% (theoretically),
  • They show high resistance to demagnetization induced by external disturbances,
  • Thanks to the shiny finish, the coating of nickel, gold-plated, or silver-plated gives an aesthetic appearance,
  • Magnets have maximum 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...
  • Thanks to versatility in constructing and the ability to adapt to specific needs,
  • Versatile presence in advanced technology sectors – they are utilized in hard drives, motor assemblies, medical equipment, as well as modern systems.
  • Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Weaknesses

Characteristics of disadvantages of neodymium magnets: tips and applications.
  • To avoid cracks under impact, we suggest using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
  • Do not exceed this material temperature limit: 80°C. Overheating may permanently weaken the magnet.
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
  • Due to limitations in realizing threads and complicated shapes in magnets, we recommend using cover - magnetic mount.
  • Health risk resulting from small fragments of magnets are risky, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, small elements of these devices can complicate diagnosis medical when they are in the body.
  • Due to expensive raw materials, their price exceeds standard values,

Holding force characteristics

Best holding force of the magnet in ideal parameters – what contributes to it?

Magnet power was determined for ideal contact conditions, including:
  • using a sheet made of high-permeability steel, acting as a ideal flux conductor
  • possessing a thickness of minimum 10 mm to avoid saturation
  • characterized by lack of roughness
  • with direct contact (without paint)
  • for force applied at a right angle (in the magnet axis)
  • at ambient temperature room level

Practical lifting capacity: influencing factors

It is worth knowing that the application force may be lower subject to elements below, in order of importance:
  • Distance – existence of any layer (paint, dirt, gap) interrupts the magnetic circuit, which reduces capacity rapidly (even by 50% at 0.5 mm).
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
  • Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet restricts the attraction force (the magnet "punches through" it).
  • Metal type – not every steel attracts identically. High carbon content worsen the attraction effect.
  • Smoothness – full contact is obtained only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Thermal factor – hot environment reduces pulling force. Too high temperature can permanently damage the magnet.

Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance between the magnet’s surface and the plate decreases the holding force.

Warnings
Flammability

Drilling and cutting of neodymium magnets poses a fire risk. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Serious injuries

Mind your fingers. Two large magnets will join immediately with a force of massive weight, destroying everything in their path. Exercise extreme caution!

Thermal limits

Monitor thermal conditions. Heating the magnet to high heat will ruin its properties and strength.

Nickel coating and allergies

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If redness happens, immediately stop working with magnets and use protective gear.

Threat to navigation

GPS units and mobile phones are extremely susceptible to magnetism. Direct contact with a strong magnet can ruin the internal compass in your phone.

Danger to the youngest

Always keep magnets out of reach of children. Ingestion danger is high, and the effects of magnets connecting inside the body are fatal.

Magnets are brittle

NdFeB magnets are sintered ceramics, which means they are very brittle. Clashing of two magnets will cause them cracking into shards.

Electronic hazard

Avoid bringing magnets near a purse, laptop, or TV. The magnetic field can destroy these devices and erase data from cards.

Powerful field

Before starting, check safety instructions. Sudden snapping can break the magnet or hurt your hand. Think ahead.

Health Danger

Medical warning: Neodymium magnets can deactivate pacemakers and defibrillators. Do not approach if you have medical devices.

Warning! Need more info? Check our post: Are neodymium magnets dangerous?