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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

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

technical parameters »

59.90 ZŁ with VAT / pcs + price for transport

48.70 ZŁ net + 23% VAT / pcs

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Detailed specification - 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
Engineering data and GPSR
Elemental analysis
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: 190415-2026
Measurement Calculator
Force (pull)
Magnetic Field
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A magnet with a built-in screw is great for screwing with a nut to housings, profiles, and flat bars. Just pass the thread through the hole in the element and tighten the nut on the other side. They are commonly used in machine building, exhibition stands, lighting, and advertising.
Too strong tightening with a wrench can cause the stud to rotate in the cup or strip 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.
Maximum operating temperature is 80 degrees Celsius for the standard version. We also offer holders made of ferrite magnets (resistant up to 200°C) or special high-temperature versions. Avoid mounting directly on hot engine or machine components.
Holders are equipped with standard metric threads (e.g., M4, M6, M8, M10). Exact screw dimensions can be found in the product technical table. 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. It is a solution optimized for strong holding with direct contact, not attracting from afar.

Pros and cons of Nd2Fe14B magnets.

Benefits

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They do not lose power, even during nearly ten years – the reduction in lifting capacity is only ~1% (based on measurements),
  • Magnets perfectly protect themselves against demagnetization caused by foreign field sources,
  • In other words, due to the glossy finish of nickel, the element looks attractive,
  • They show high magnetic induction at the operating surface, which increases their power,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
  • Possibility of exact modeling and optimizing to precise conditions,
  • Wide application in modern industrial fields – they are utilized in mass storage devices, electric drive systems, diagnostic systems, as well as technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which allows their use in compact constructions

Weaknesses

Disadvantages of NdFeB magnets:
  • To avoid cracks under impact, we suggest using special steel holders. Such a solution secures the magnet and simultaneously increases its durability.
  • NdFeB magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • 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 prevent oxidation and corrosion.
  • Limited possibility of producing threads in the magnet and complicated forms - recommended is casing - mounting mechanism.
  • Potential hazard resulting from small fragments of magnets pose a threat, in case of ingestion, which gains importance in the aspect of protecting the youngest. Furthermore, small components of these magnets are able to complicate diagnosis medical when they are in the body.
  • Due to complex production process, their price is relatively high,

Pull force analysis

Maximum lifting force for a neodymium magnet – what contributes to it?

The load parameter shown concerns the peak performance, measured under laboratory conditions, specifically:
  • using a plate made of low-carbon steel, acting as a magnetic yoke
  • possessing a thickness of minimum 10 mm to ensure full flux closure
  • with an polished contact surface
  • with total lack of distance (without paint)
  • under vertical force vector (90-degree angle)
  • in neutral thermal conditions

What influences lifting capacity in practice

Bear in mind that the application force may be lower depending on elements below, starting with the most relevant:
  • Distance (betwixt the magnet and the plate), as even a microscopic clearance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to paint, corrosion or debris).
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the maximum value.
  • Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Steel type – low-carbon steel gives the best results. Higher carbon content lower magnetic permeability and lifting capacity.
  • Surface quality – the more even the plate, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
  • Temperature influence – high temperature reduces pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, however under shearing force the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate decreases the holding force.

Safety rules for work with neodymium magnets
Beware of splinters

Neodymium magnets are sintered ceramics, meaning they are very brittle. Collision of two magnets leads to them shattering into shards.

Danger to the youngest

Always keep magnets away from children. Risk of swallowing is high, and the effects of magnets clamping inside the body are tragic.

Danger to pacemakers

Warning for patients: Powerful magnets affect electronics. Maintain at least 30 cm distance or ask another person to work with the magnets.

Safe operation

Handle magnets consciously. Their huge power can shock even experienced users. Stay alert and respect their power.

Precision electronics

A powerful magnetic field interferes with the functioning of compasses in phones and GPS navigation. Maintain magnets near a device to prevent damaging the sensors.

Avoid contact if allergic

A percentage of the population have a hypersensitivity to nickel, which is the typical protective layer for NdFeB magnets. Extended handling may cause a rash. It is best to use protective gloves.

Fire warning

Machining of NdFeB material poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Data carriers

Equipment safety: Strong magnets can damage data carriers and delicate electronics (pacemakers, medical aids, timepieces).

Crushing force

Protect your hands. Two powerful magnets will snap together immediately with a force of several hundred kilograms, destroying anything in their path. Exercise extreme caution!

Heat sensitivity

Keep cool. NdFeB magnets are susceptible to temperature. If you need resistance above 80°C, ask us about special high-temperature series (H, SH, UH).

Warning! Want to know more? Check our post: Why are neodymium magnets dangerous?