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UMGZ 16x13x5 [M4] GZ / N38 - magnetic holder external thread

magnetic holder external thread

Catalog no 190321

GTIN/EAN: 5906301813804

5.00

Diameter Ø

16 mm [±1 mm]

Height

13 mm [±1 mm]

Height

5 mm [±1 mm]

Weight

7 g

Load capacity

5.00 kg / 49.03 N

see technical data »

3.89 ZŁ with VAT / pcs + price for transport

3.16 ZŁ net + 23% VAT / pcs

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Technical details - UMGZ 16x13x5 [M4] GZ / N38 - magnetic holder external thread

Specification / characteristics - UMGZ 16x13x5 [M4] GZ / N38 - magnetic holder external thread

properties
properties values
Cat. no. 190321
GTIN/EAN 5906301813804
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 [±1 mm]
Height 13 mm [±1 mm]
Height 5 mm [±1 mm]
Weight 7 g
Load capacity ~ ? 5.00 kg / 49.03 N
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGZ 16x13x5 [M4] GZ / N38 - magnetic holder external thread
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 and environmental data
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: 190321-2026
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It is a ready-made mounting element that allows quick creation of a magnetic point. Mounting consists of inserting the screw into the hole and securing with a nut (e.g., wing nut). They are commonly used in machine building, exhibition stands, lighting, and advertising.
The threaded stud is an integral part of the steel housing, but avoid overtightening the thread. When assembling, use a torque wrench or tighten with feeling. The magnet itself is protected by a steel cup and is very resistant to impact.
Above this temperature, the magnet may irreversibly lose some of its power. If you need resistance to higher temperatures, ask about special versions (H, SH). Remember that even momentary overheating can weaken the holder.
Thread size (e.g., M6) is always given in the product name and technical specification. Stud length varies depending on the model (usually from 8 to 15 mm). The thread is made of galvanized steel, ensuring corrosion resistance.
The magnetic system in a cup is more energy-efficient than the magnet itself of the same dimensions. However, such a system works point-wise and requires direct contact with metal.

Strengths as well as weaknesses of Nd2Fe14B magnets.

Pros

Apart from their consistent magnetic energy, neodymium magnets have these key benefits:
  • They retain attractive force for almost 10 years – the loss is just ~1% (according to analyses),
  • They feature excellent resistance to magnetic field loss due to external magnetic sources,
  • By applying a reflective layer of silver, the element gains an elegant look,
  • Magnets are characterized by extremely high magnetic induction on the surface,
  • 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...
  • Thanks to modularity in shaping and the capacity to customize to client solutions,
  • Huge importance in advanced technology sectors – they find application in hard drives, motor assemblies, advanced medical instruments, also complex engineering applications.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Weaknesses

Disadvantages of NdFeB magnets:
  • To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • Limited ability of creating nuts in the magnet and complex shapes - preferred is cover - magnetic holder.
  • Health risk to health – tiny shards of magnets are risky, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Furthermore, tiny parts of these products are able to complicate diagnosis medical when they are in the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities

Pull force analysis

Maximum magnetic pulling force – what affects it?

The specified lifting capacity concerns the peak performance, obtained under ideal test conditions, specifically:
  • using a base made of mild steel, serving as a circuit closing element
  • whose transverse dimension equals approx. 10 mm
  • characterized by lack of roughness
  • with total lack of distance (no impurities)
  • for force applied at a right angle (pull-off, not shear)
  • in neutral thermal conditions

Practical aspects of lifting capacity – factors

In real-world applications, the actual lifting capacity is determined by several key aspects, presented from crucial:
  • Air gap (betwixt the magnet and the metal), because even a microscopic clearance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to paint, rust or debris).
  • Load vector – maximum parameter is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is typically many times lower (approx. 1/5 of the lifting capacity).
  • Base massiveness – too thin steel does not accept the full field, causing part of the power to be escaped to the other side.
  • Metal type – different alloys attracts identically. Alloy additives weaken the interaction with the magnet.
  • Base smoothness – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Roughness acts like micro-gaps.
  • Heat – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and in frost gain strength (up to a certain limit).

Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, however under attempts to slide the magnet the load capacity is reduced by as much as 5 times. Moreover, even a minimal clearance between the magnet’s surface and the plate reduces the holding force.

Precautions when working with NdFeB magnets
Powerful field

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

Compass and GPS

A strong magnetic field negatively affects the functioning of compasses in smartphones and navigation systems. Keep magnets close to a device to prevent damaging the sensors.

Maximum temperature

Standard neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. This process is irreversible.

Magnetic media

Powerful magnetic fields can corrupt files on payment cards, HDDs, and storage devices. Maintain a gap of min. 10 cm.

Material brittleness

Neodymium magnets are ceramic materials, meaning they are fragile like glass. Clashing of two magnets leads to them shattering into shards.

Pinching danger

Big blocks can break fingers instantly. Under no circumstances put your hand betwixt two attracting surfaces.

Nickel allergy

Nickel alert: The nickel-copper-nickel coating consists of nickel. If an allergic reaction appears, immediately stop handling magnets and wear gloves.

Choking Hazard

Adult use only. Small elements pose a choking risk, causing serious injuries. Keep away from kids and pets.

Warning for heart patients

People with a heart stimulator should keep an absolute distance from magnets. The magnetism can interfere with the operation of the life-saving device.

Fire warning

Combustion risk: Neodymium dust is explosive. Do not process magnets in home conditions as this risks ignition.

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