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UMGZ 48x24x11.5 [M8] GZ / N38 - magnetic holder external thread

magnetic holder external thread

Catalog no 190415

GTIN/EAN: 5906301813866

5.00
Load capacity 80.00 kg / 784.53 N
Diameter Ø
48 mm [±1 mm]
Height
24 mm [±1 mm]
Height
11.5 mm [±1 mm]
Weight
140 g
Coating
[NiCuNi] Nickel
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59.90 zł with VAT / pcs + price for transport

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Specifications along with shape of a neodymium magnet can be estimated using our magnetic calculator.

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Product card - UMGZ 48x24x11.5 [M8] GZ / N38 - magnetic holder external thread

Specification / characteristics - UMGZ 48x24x11.5 [M8] GZ / N38 - magnetic holder external thread

properties
properties values
Cat. no. 190415
GTIN/EAN 5906301813866
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 48 mm [±1 mm]
Height 24 mm [±1 mm]
Height 11.5 mm [±1 mm]
Weight 140 g
Load capacity ~ ? 80.00 kg / 784.53 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGZ 48x24x11.5 [M8] 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 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%

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: 190415-2026
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This type of holder has a integrated threaded stud (screw), making it perfect for mounting in through holes. Mounting consists of inserting the screw into the hole and securing with a nut (e.g., wing nut). Used for mounting sensors, panels, plates, and exhibition elements.
Too strong tightening with a wrench can cause the stud to rotate in the cup or strip the thread. Do not use the magnet as a structural bolt transferring huge mechanical loads in shear. 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.
We use standardized threads that fit typical nuts available in every store. Exact screw dimensions can be found in the product technical table. It is a solid threaded connection, ready for use.
Yes, the steel housing (cup) focuses the magnetic field, significantly increasing attraction force on the active side. However, such a system works point-wise and requires direct contact with metal.

Advantages and disadvantages of rare earth magnets.

Advantages

Besides their high retention, neodymium magnets are valued for these benefits:
  • They have constant strength, and over around 10 years their performance decreases symbolically – ~1% (in testing),
  • They are noted for resistance to demagnetization induced by external field influence,
  • In other words, due to the shiny surface of nickel, the element becomes visually attractive,
  • Magnetic induction on the surface of the magnet is maximum,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling operation at temperatures reaching 230°C and above...
  • Thanks to modularity in designing and the capacity to adapt to specific needs,
  • Fundamental importance in modern technologies – they are used in mass storage devices, electromotive mechanisms, precision medical tools, also complex engineering applications.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Limitations

Disadvantages of NdFeB magnets:
  • To avoid cracks under impact, we suggest using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
  • Limited possibility of making threads in the magnet and complicated forms - recommended is casing - mounting mechanism.
  • Possible danger related to microscopic parts of magnets are risky, in case of ingestion, which gains importance in the context of child safety. Furthermore, tiny parts of these devices are able to complicate diagnosis medical after entering the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Holding force characteristics

Maximum lifting capacity of the magnet – what it depends on?

The declared magnet strength refers to the limit force, recorded under ideal test conditions, meaning:
  • with the application of a sheet made of special test steel, guaranteeing maximum field concentration
  • whose thickness is min. 10 mm
  • with a surface cleaned and smooth
  • under conditions of no distance (metal-to-metal)
  • for force acting at a right angle (pull-off, not shear)
  • at standard ambient temperature

Determinants of practical lifting force of a magnet

Please note that the magnet holding will differ influenced by the following factors, starting with the most relevant:
  • Distance – existence of any layer (rust, dirt, air) interrupts the magnetic circuit, which reduces power steeply (even by 50% at 0.5 mm).
  • Direction of force – highest force is available only during perpendicular pulling. The resistance to sliding of the magnet along the plate is typically several times smaller (approx. 1/5 of the lifting capacity).
  • Plate thickness – too thin plate does not accept the full field, causing part of the power to be escaped to the other side.
  • Plate material – mild steel attracts best. Alloy steels lower magnetic properties and holding force.
  • Smoothness – ideal contact is possible only on polished steel. Rough texture create air cushions, weakening the magnet.
  • Temperature – temperature increase results in weakening of force. It is worth remembering the thermal limit for a given model.

Lifting capacity was measured with the use of a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, whereas under shearing force the load capacity is reduced by as much as fivefold. Additionally, even a slight gap between the magnet and the plate reduces the holding force.

Safety rules for work with NdFeB magnets
Medical implants

Life threat: Neodymium magnets can turn off pacemakers and defibrillators. Stay away if you have medical devices.

GPS Danger

Remember: neodymium magnets produce a field that interferes with sensitive sensors. Maintain a separation from your mobile, device, and GPS.

Permanent damage

Regular neodymium magnets (N-type) undergo demagnetization when the temperature exceeds 80°C. Damage is permanent.

Crushing risk

Watch your fingers. Two powerful magnets will snap together immediately with a force of massive weight, destroying anything in their path. Exercise extreme caution!

Handling rules

Handle with care. Neodymium magnets act from a long distance and connect with massive power, often quicker than you can move away.

Flammability

Combustion risk: Neodymium dust is explosive. Do not process magnets without safety gear as this risks ignition.

Danger to the youngest

Neodymium magnets are not intended for children. Eating a few magnets may result in them connecting inside the digestive tract, which constitutes a critical condition and necessitates immediate surgery.

Protect data

Powerful magnetic fields can erase data on credit cards, hard drives, and other magnetic media. Maintain a gap of min. 10 cm.

Allergic reactions

A percentage of the population have a sensitization to Ni, which is the standard coating for NdFeB magnets. Prolonged contact may cause skin redness. It is best to wear safety gloves.

Magnets are brittle

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

Warning! Need more info? Read our article: Why are neodymium magnets dangerous?