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UMGW 32x18x8 [M6] GW / N38 - magnetic holder internal thread

magnetic holder internal thread

Catalog no 180318

GTIN/EAN: 5906301813743

5.00

Diameter Ø

32 mm [±1 mm]

Height

18 mm [±1 mm]

Height

8 mm [±1 mm]

Weight

42 g

Load capacity

34.00 kg / 333.43 N

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15.22 ZŁ with VAT / pcs + price for transport

12.37 ZŁ net + 23% VAT / pcs

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Technical - UMGW 32x18x8 [M6] GW / N38 - magnetic holder internal thread

Specification / characteristics - UMGW 32x18x8 [M6] GW / N38 - magnetic holder internal thread

properties
properties values
Cat. no. 180318
GTIN/EAN 5906301813743
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 32 mm [±1 mm]
Height 18 mm [±1 mm]
Height 8 mm [±1 mm]
Weight 42 g
Load capacity ~ ? 34.00 kg / 333.43 N
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGW 32x18x8 [M6] 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
Technical and environmental data
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: 180318-2026
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Pulling force
Magnetic Induction
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The steel cup acts as an armature, concentrating the magnetic flux and increasing capacity even several times. Moreover, the metal housing protects the brittle neodymium magnet from cracking upon impact. The threaded hole allows creating a functional mounting point in seconds.
Care must be taken not to screw the bolt too deep into the magnet bushing. 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. Ideal for fixing lighting on machine tools and welding tables.
Nominal capacity (for this model approx. 34.00 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.

Strengths and weaknesses of Nd2Fe14B magnets.

Advantages

Apart from their strong holding force, neodymium magnets have these key benefits:
  • They have stable power, and over more than 10 years their attraction force decreases symbolically – ~1% (in testing),
  • They feature excellent resistance to magnetism drop due to external magnetic sources,
  • By covering with a reflective layer of gold, the element presents an elegant look,
  • Magnets are characterized by excellent magnetic induction on the active area,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Possibility of custom machining and adjusting to precise applications,
  • Huge importance in high-tech industry – they find application in HDD drives, electric motors, medical devices, and industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which allows their use in miniature devices

Disadvantages

Characteristics of disadvantages of neodymium magnets and ways of using them
  • To avoid cracks under impact, we suggest using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • Neodymium magnets decrease 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 durability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • Limited possibility of producing threads in the magnet and complex forms - recommended is a housing - mounting mechanism.
  • Health risk to health – tiny shards of magnets can be dangerous, if swallowed, which is particularly important in the context of child health protection. Furthermore, small components of these devices can be problematic in diagnostics medical in case of swallowing.
  • With large orders the cost of neodymium magnets is economically unviable,

Lifting parameters

Optimal lifting capacity of a neodymium magnet – what affects it?

The declared magnet strength concerns the peak performance, recorded under ideal test conditions, specifically:
  • on a block made of mild steel, perfectly concentrating the magnetic field
  • whose transverse dimension reaches at least 10 mm
  • characterized by lack of roughness
  • without any air gap between the magnet and steel
  • under vertical application of breakaway force (90-degree angle)
  • at standard ambient temperature

Practical lifting capacity: influencing factors

In practice, the real power is determined by many variables, listed from crucial:
  • Distance – existence of any layer (paint, tape, air) acts as an insulator, which reduces power steeply (even by 50% at 0.5 mm).
  • Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the maximum value.
  • Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
  • Material composition – not every steel reacts the same. High carbon content weaken the interaction with the magnet.
  • Surface quality – the more even the plate, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
  • Heat – NdFeB sinters have a sensitivity to temperature. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).

Lifting capacity was assessed using a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under parallel forces the lifting capacity is smaller. In addition, even a small distance between the magnet and the plate reduces the holding force.

Warnings
Sensitization to coating

It is widely known that nickel (the usual finish) is a common allergen. If you have an allergy, prevent touching magnets with bare hands or opt for coated magnets.

Safe operation

Before use, check safety instructions. Sudden snapping can break the magnet or hurt your hand. Be predictive.

Pinching danger

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

Adults only

Absolutely keep magnets out of reach of children. Ingestion danger is high, and the effects of magnets clamping inside the body are fatal.

Machining danger

Fire warning: Rare earth powder is highly flammable. Do not process magnets in home conditions as this may cause fire.

Implant safety

Warning for patients: Strong magnetic fields affect medical devices. Keep minimum 30 cm distance or request help to handle the magnets.

Impact on smartphones

Navigation devices and mobile phones are highly susceptible to magnetism. Close proximity with a strong magnet can decalibrate the internal compass in your phone.

Eye protection

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

Power loss in heat

Regular neodymium magnets (grade N) lose magnetization when the temperature exceeds 80°C. This process is irreversible.

Protect data

Powerful magnetic fields can erase data on payment cards, HDDs, and storage devices. Keep a distance of min. 10 cm.

Danger! Need more info? Read our article: Are neodymium magnets dangerous?