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UMC 75x11/6x18 / N38 - cylindrical magnetic holder

cylindrical magnetic holder

Catalog no 320414

GTIN/EAN: 5906301814702

5.00

Diameter

75 mm [±1 mm]

internal diameter Ø

11/6 mm [±1 mm]

Height

18 mm [±1 mm]

Weight

465 g

Load capacity

155.00 kg / 1520.03 N

Coating

[NiCuNi] Nickel

technical details »

169.86 ZŁ with VAT / pcs + price for transport

138.10 ZŁ net + 23% VAT / pcs

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Strength and structure of neodymium magnets can be checked with our power calculator.

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Technical - UMC 75x11/6x18 / N38 - cylindrical magnetic holder

Specification / characteristics - UMC 75x11/6x18 / N38 - cylindrical magnetic holder

properties
properties values
Cat. no. 320414
GTIN/EAN 5906301814702
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 75 mm [±1 mm]
internal diameter Ø 11/6 mm [±1 mm]
Height 18 mm [±1 mm]
Weight 465 g
Load capacity ~ ? 155.00 kg / 1520.03 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMC 75x11/6x18 / 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
Chemical composition
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%
Environmental data
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: 320414-2026
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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. Thanks to side shielding, they do not "catch" the walls of the mounting hole, which facilitates installation.
These holders usually have an internal thread (blind or through) on the back wall. The mounting thread allows for stable and secure fixing in a machine or jig.
All magnet energy is directed exclusively to the front (active surface), increasing point force. 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.
Dimensions may vary slightly, so they are not always H7 fitted elements without machining. It is an industrial product, not a precise machine element, although the execution is careful.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Strengths

Apart from their notable power, neodymium magnets have these key benefits:
  • They retain magnetic properties for around 10 years – the loss is just ~1% (in theory),
  • They are extremely resistant to demagnetization induced by presence of other magnetic fields,
  • Thanks to the shimmering finish, the plating of Ni-Cu-Ni, gold, or silver-plated gives an professional appearance,
  • The surface of neodymium magnets generates a maximum magnetic field – this is a distinguishing feature,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Possibility of precise machining as well as modifying to defined requirements,
  • Key role in high-tech industry – they are commonly used in data components, electromotive mechanisms, precision medical tools, also technologically advanced constructions.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages

Drawbacks and weaknesses of neodymium magnets and proposals for their use:
  • To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution protects the magnet and simultaneously increases 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
  • 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 forms in magnets, we recommend using cover - magnetic mechanism.
  • Health risk resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child health protection. It is also worth noting that small components of these devices can complicate diagnosis medical in case of swallowing.
  • Due to complex production process, their price is higher than average,

Pull force analysis

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

Holding force of 155.00 kg is a result of laboratory testing performed under the following configuration:
  • on a block made of mild steel, effectively closing the magnetic field
  • with a thickness no less than 10 mm
  • characterized by lack of roughness
  • under conditions of no distance (metal-to-metal)
  • during detachment in a direction vertical to the plane
  • at room temperature

Lifting capacity in practice – influencing factors

Holding efficiency is influenced by specific conditions, such as (from priority):
  • Air gap (between the magnet and the metal), as even a microscopic clearance (e.g. 0.5 mm) leads to a reduction in lifting capacity by up to 50% (this also applies to varnish, rust or debris).
  • Loading method – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet exhibits significantly lower power (typically approx. 20-30% of nominal force).
  • Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
  • Material composition – different alloys attracts identically. Alloy additives weaken the interaction with the magnet.
  • Plate texture – smooth surfaces guarantee perfect abutment, which increases field saturation. Rough surfaces reduce efficiency.
  • Temperature – temperature increase results in weakening of induction. Check the thermal limit for a given model.

Lifting capacity was assessed by applying a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular detachment force, however under attempts to slide the magnet the load capacity is reduced by as much as 75%. In addition, even a small distance between the magnet and the plate lowers the load capacity.

H&S for magnets
Bodily injuries

Large magnets can crush fingers instantly. Never place your hand betwixt two attracting surfaces.

Dust explosion hazard

Dust generated during grinding of magnets is combustible. Do not drill into magnets unless you are an expert.

Compass and GPS

Remember: rare earth magnets generate a field that interferes with precision electronics. Keep a separation from your mobile, device, and navigation systems.

Handling guide

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

Cards and drives

Data protection: Neodymium magnets can damage data carriers and sensitive devices (heart implants, hearing aids, mechanical watches).

Permanent damage

Standard neodymium magnets (grade N) lose power when the temperature surpasses 80°C. This process is irreversible.

Sensitization to coating

A percentage of the population have a contact allergy to Ni, which is the standard coating for NdFeB magnets. Frequent touching can result in a rash. We recommend use safety gloves.

Product not for children

Neodymium magnets are not intended for children. Swallowing several magnets can lead to them attracting across intestines, which constitutes a severe health hazard and requires immediate surgery.

Fragile material

Neodymium magnets are ceramic materials, meaning they are very brittle. Impact of two magnets will cause them breaking into small pieces.

ICD Warning

Life threat: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have medical devices.

Attention! Learn more about risks in the article: Safety of working with magnets.