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UMC 32x11/3x8 / N38 - cylindrical magnetic holder

cylindrical magnetic holder

Catalog no 320409

GTIN/EAN: 5906301814658

5.00

Diameter

32 mm [±1 mm]

internal diameter Ø

11/3 mm [±1 mm]

Height

8 mm [±1 mm]

Weight

36 g

Load capacity

23.00 kg / 225.55 N

Coating

[NiCuNi] Nickel

technical parameters »

17.98 ZŁ with VAT / pcs + price for transport

14.62 ZŁ net + 23% VAT / pcs

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Give us a call +48 888 99 98 98 otherwise send us a note using request form the contact form page.
Lifting power along with structure of neodymium magnets can be tested using our magnetic calculator.

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Technical parameters of the product - UMC 32x11/3x8 / N38 - cylindrical magnetic holder

Specification / characteristics - UMC 32x11/3x8 / N38 - cylindrical magnetic holder

properties
properties values
Cat. no. 320409
GTIN/EAN 5906301814658
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 32 mm [±1 mm]
internal diameter Ø 11/3 mm [±1 mm]
Height 8 mm [±1 mm]
Weight 36 g
Load capacity ~ ? 23.00 kg / 225.55 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMC 32x11/3x8 / N38 - cylindrical magnetic holder
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
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%
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: 320409-2026
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Cylindrical holders (Type B) distinguish themselves with a large body height, which allows for deep mounting. They are used in positioning elements, injection molds, dies, and automation.
These holders usually have an internal thread (blind or through) on the back wall. It is a precise, durable solution enabling depth adjustment.
The construction causes the magnetic flux to short-circuit inside, making the sides practically non-magnetic. It increases attraction force in the magnet axis and facilitates assembly in ferromagnetic blocks.
The neodymium magnet is deeply embedded (glued) in a solid block of steel or brass, making it very resistant. The risk of magnet cracking with normal use is minimal as it is shielded.
These holders are produced with standard tolerance for industrial magnets (usually ±0.1 mm or h6). For mounting certainty and centering, gluing or screw fastening from the back is used.

Pros as well as cons of rare earth magnets.

Benefits

Apart from their consistent power, neodymium magnets have these key benefits:
  • They do not lose magnetism, even over nearly ten years – the decrease in strength is only ~1% (theoretically),
  • Magnets very well defend themselves against demagnetization caused by foreign field sources,
  • In other words, due to the smooth finish of gold, the element is aesthetically pleasing,
  • They show high magnetic induction at the operating surface, making them more effective,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
  • Considering the ability of accurate forming and adaptation to individualized solutions, NdFeB magnets can be produced in a variety of shapes and sizes, which increases their versatility,
  • Huge importance in modern industrial fields – they find application in computer drives, electric drive systems, advanced medical instruments, as well as modern systems.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

Disadvantages of NdFeB magnets:
  • At very strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets decrease their force 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 durability even at temperatures up to 230°C
  • When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation as well as corrosion.
  • Limited ability of producing nuts in the magnet and complicated forms - preferred is cover - mounting mechanism.
  • Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, small components of these devices are able to be problematic in diagnostics medical in case of swallowing.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Pull force analysis

Highest magnetic holding force – what contributes to it?

The force parameter is a measurement result executed under the following configuration:
  • on a plate made of structural steel, optimally conducting the magnetic field
  • whose thickness equals approx. 10 mm
  • with an polished contact surface
  • with zero gap (no impurities)
  • during pulling in a direction vertical to the plane
  • at ambient temperature room level

Determinants of lifting force in real conditions

Bear in mind that the application force may be lower depending on elements below, starting with the most relevant:
  • Clearance – the presence of any layer (rust, tape, gap) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
  • Force direction – declared lifting capacity refers to pulling vertically. When slipping, the magnet exhibits significantly lower power (typically approx. 20-30% of nominal force).
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
  • Material type – the best choice is high-permeability steel. Cast iron may attract less.
  • Surface condition – ground elements guarantee perfect abutment, which increases field saturation. Uneven metal weaken the grip.
  • Temperature – temperature increase results in weakening of force. Check the thermal limit for a given model.

Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the lifting capacity is smaller. In addition, even a slight gap between the magnet and the plate reduces the load capacity.

Precautions when working with neodymium magnets
No play value

Always keep magnets away from children. Choking hazard is high, and the consequences of magnets connecting inside the body are tragic.

Fragile material

Despite the nickel coating, neodymium is delicate and cannot withstand shocks. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Metal Allergy

Medical facts indicate that the nickel plating (the usual finish) is a strong allergen. If you have an allergy, refrain from touching magnets with bare hands and select versions in plastic housing.

Data carriers

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

Crushing force

Danger of trauma: The attraction force is so great that it can cause hematomas, pinching, and broken bones. Use thick gloves.

Caution required

Use magnets with awareness. Their huge power can shock even professionals. Be vigilant and do not underestimate their power.

Heat sensitivity

Keep cool. NdFeB magnets are sensitive to temperature. If you require resistance above 80°C, inquire about special high-temperature series (H, SH, UH).

Dust is flammable

Drilling and cutting of NdFeB material carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Impact on smartphones

A strong magnetic field disrupts the operation of compasses in phones and GPS navigation. Maintain magnets near a smartphone to avoid damaging the sensors.

Danger to pacemakers

Health Alert: Neodymium magnets can deactivate pacemakers and defibrillators. Stay away if you have electronic implants.

Safety First! Want to know more? Check our post: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98