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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

Magnetization Direction

↑ axial

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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Technical specification 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
Magnetization Direction ↑ axial
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
Engineering data and GPSR
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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These are magnets in the shape of a rod in a brass or steel sleeve, ideal for embedding in deep sockets. They are used in positioning elements, injection molds, dies, and automation.
It can also be glued or pressed (maintaining tolerance) into a prepared hole. It is a precise, durable solution enabling depth adjustment.
The thick, steel or brass housing (sleeve) effectively screens the magnetic field on the sides of the holder. It enables precise point action without side interference.
The neodymium magnet is deeply embedded (glued) in a solid block of steel or brass, making it very resistant. Suitable for working in difficult workshop and industrial conditions.
We recommend making the mounting hole with slight clearance and using glue for certainty. If high precision is required, measure the specific batch with a caliper before machining sockets.

Strengths as well as weaknesses of rare earth magnets.

Benefits

Besides their exceptional strength, neodymium magnets offer the following advantages:
  • They retain attractive force for almost ten years – the drop is just ~1% (based on simulations),
  • Magnets effectively protect themselves against loss of magnetization caused by foreign field sources,
  • The use of an aesthetic layer of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • Magnets exhibit exceptionally strong magnetic induction on the working surface,
  • Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
  • Considering the ability of precise shaping and customization to custom needs, magnetic components can be produced in a broad palette of shapes and sizes, which increases their versatility,
  • Key role in electronics industry – they find application in data components, electric motors, advanced medical instruments, as well as modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which allows their use in miniature devices

Disadvantages

What to avoid - cons of neodymium magnets: weaknesses and usage proposals
  • To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • Neodymium magnets decrease their power 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
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • Limited ability of producing nuts in the magnet and complicated shapes - preferred is cover - magnetic holder.
  • Possible danger related to microscopic parts of magnets pose a threat, if swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small elements of these products are able to disrupt the diagnostic process medical when they are in the body.
  • With budget limitations the cost of neodymium magnets is economically unviable,

Pull force analysis

Maximum magnetic pulling force – what affects it?

The specified lifting capacity concerns the maximum value, measured under optimal environment, specifically:
  • using a base made of high-permeability steel, functioning as a magnetic yoke
  • with a cross-section minimum 10 mm
  • with an ground touching surface
  • under conditions of ideal adhesion (surface-to-surface)
  • for force acting at a right angle (in the magnet axis)
  • at temperature room level

What influences lifting capacity in practice

In real-world applications, the actual holding force depends on many variables, presented from crucial:
  • Distance – the presence of any layer (paint, dirt, gap) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Steel thickness – insufficiently thick steel does not accept the full field, causing part of the flux to be wasted into the air.
  • Metal type – not every steel attracts identically. High carbon content worsen the attraction effect.
  • Surface structure – the smoother and more polished the surface, the better the adhesion and higher the lifting capacity. Roughness acts like micro-gaps.
  • Temperature influence – high temperature reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Lifting capacity was determined using a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, in contrast under attempts to slide the magnet the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate lowers the holding force.

Safe handling of neodymium magnets
ICD Warning

Health Alert: Strong magnets can deactivate pacemakers and defibrillators. Do not approach if you have electronic implants.

Allergic reactions

Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If skin irritation appears, cease handling magnets and use protective gear.

Flammability

Powder created during machining of magnets is flammable. Do not drill into magnets unless you are an expert.

Keep away from computers

Very strong magnetic fields can corrupt files on credit cards, hard drives, and other magnetic media. Keep a distance of at least 10 cm.

Pinching danger

Risk of injury: The pulling power is so great that it can result in blood blisters, pinching, and broken bones. Protective gloves are recommended.

Choking Hazard

Neodymium magnets are not intended for children. Swallowing a few magnets may result in them attracting across intestines, which poses a critical condition and necessitates urgent medical intervention.

Do not underestimate power

Before starting, read the rules. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.

Eye protection

NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Clashing of two magnets will cause them cracking into small pieces.

Compass and GPS

Navigation devices and mobile phones are extremely susceptible to magnetic fields. Close proximity with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

Do not overheat magnets

Avoid heat. Neodymium magnets are sensitive to heat. If you need resistance above 80°C, ask us about special high-temperature series (H, SH, UH).

Safety First! Learn more about hazards in the article: Safety of working with magnets.