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UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread

magnetic holder internal thread

Catalog no 180319

GTIN/EAN: 5906301813750

5.00

Diameter Ø

36 mm [±1 mm]

Height

18 mm [±1 mm]

Height

8 mm [±1 mm]

Weight

52 g

Magnetization Direction

↑ axial

Load capacity

40.00 kg / 392.27 N

Coating

[NiCuNi] Nickel

technical parameters »

23.99 ZŁ with VAT / pcs + price for transport

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Technical specification - UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread

Specification / characteristics - UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread

properties
properties values
Cat. no. 180319
GTIN/EAN 5906301813750
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 36 mm [±1 mm]
Height 18 mm [±1 mm]
Height 8 mm [±1 mm]
Weight 52 g
Magnetization Direction ↑ axial
Load capacity ~ ? 40.00 kg / 392.27 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal 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: 180319-2026
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A magnetic holder (magnet in a steel cup) is much stronger on one side than a bare magnet of the same dimensions. Moreover, the metal housing protects the brittle neodymium magnet from cracking upon impact. The threaded hole allows creating a functional mounting point in seconds.
The most important rule is choosing the appropriate length of the screw being screwed in. If the screw reaches the bottom of the bushing and is further tightened forcefully, it will destroy the magnet. It is worth securing the thread with thread glue if the connection is to be durable and resistant to vibrations.
These holders are commonly used in industry, advertising, and construction for quick mounting. They serve as a base for hooks, cable holders, organizers, and lighting systems. In the workshop, they can serve as mounting points for tools or measuring instruments.
Nominal capacity (for this model approx. 40.00 kg) is measured in ideal conditions: perpendicular detachment from thick steel (min. 10mm). Air gap (rust, paint, dirt) also drastically lowers holding power. For side detachment (sliding), the force is only approx. 1/3 of nominal capacity.
Steel cups are usually coated with a layer of nickel (shiny) or zinc (matte/bright), providing basic protection. However, these are not fully stainless products and may corrode with constant contact with water. The neodymium magnet itself inside is also nickel-plated.

Pros as well as cons of rare earth magnets.

Advantages

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They have unchanged lifting capacity, and over nearly ten years their attraction force decreases symbolically – ~1% (in testing),
  • Neodymium magnets are highly resistant to loss of magnetic properties caused by magnetic disturbances,
  • A magnet with a shiny gold surface has better aesthetics,
  • They are known for high magnetic induction at the operating surface, which affects their effectiveness,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to freedom in designing and the ability to adapt to specific needs,
  • Huge importance in advanced technology sectors – they are commonly used in mass storage devices, brushless drives, advanced medical instruments, also industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which makes them useful in compact constructions

Disadvantages

Cons of neodymium magnets: tips and applications.
  • At very strong impacts they can crack, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in realizing nuts and complicated forms in magnets, we recommend using cover - magnetic mount.
  • Possible danger related to microscopic parts of magnets can be dangerous, in case of ingestion, which gains importance in the context of child safety. Furthermore, small components of these products can be problematic in diagnostics medical when they are in the body.
  • With budget limitations the cost of neodymium magnets is a challenge,

Lifting parameters

Breakaway strength of the magnet in ideal conditions – what it depends on?

The force parameter is a result of laboratory testing conducted under standard conditions:
  • using a base made of high-permeability steel, functioning as a ideal flux conductor
  • whose transverse dimension reaches at least 10 mm
  • characterized by even structure
  • without any insulating layer between the magnet and steel
  • under axial force direction (90-degree angle)
  • in stable room temperature

Lifting capacity in real conditions – factors

During everyday use, the real power depends on many variables, listed from the most important:
  • Gap (between the magnet and the plate), since even a very small clearance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to paint, corrosion or debris).
  • Angle of force application – highest force is obtained only during perpendicular pulling. The force required to slide of the magnet along the surface is typically many times lower (approx. 1/5 of the lifting capacity).
  • Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of generating force.
  • Material type – ideal substrate is high-permeability steel. Stainless steels may have worse magnetic properties.
  • Plate texture – smooth surfaces ensure maximum contact, which improves field saturation. Rough surfaces reduce efficiency.
  • Temperature – heating the magnet causes a temporary drop of force. Check the thermal limit for a given model.

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, whereas under parallel forces the load capacity is reduced by as much as 75%. Moreover, even a small distance between the magnet and the plate lowers the holding force.

Warnings
Phone sensors

An intense magnetic field negatively affects the functioning of compasses in phones and GPS navigation. Do not bring magnets near a device to prevent breaking the sensors.

Safe distance

Intense magnetic fields can destroy records on payment cards, HDDs, and other magnetic media. Stay away of min. 10 cm.

Skin irritation risks

Some people experience a contact allergy to Ni, which is the typical protective layer for neodymium magnets. Extended handling might lead to an allergic reaction. We recommend use protective gloves.

Warning for heart patients

Health Alert: Neodymium magnets can turn off pacemakers and defibrillators. Stay away if you have electronic implants.

Beware of splinters

Despite the nickel coating, the material is delicate and not impact-resistant. Do not hit, as the magnet may crumble into hazardous fragments.

Fire risk

Powder generated during cutting of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.

Permanent damage

Control the heat. Heating the magnet to high heat will permanently weaken its properties and pulling force.

This is not a toy

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

Crushing risk

Pinching hazard: The attraction force is so great that it can result in blood blisters, pinching, and even bone fractures. Protective gloves are recommended.

Conscious usage

Handle magnets consciously. Their huge power can shock even experienced users. Be vigilant and respect their power.

Important! Need more info? Check our post: Are neodymium magnets dangerous?