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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

Load capacity

40.00 kg / 392.27 N

23.99 with VAT / pcs + price for transport

19.50 ZŁ net + 23% VAT / pcs

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Technical details - 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
Load capacity ~ ? 40.00 kg / 392.27 N
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
Technical specification and ecology
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%
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: 180319-2025
Quick Unit Converter
Pulling force

Field Strength

Other proposals

The steel cup acts as an armature, concentrating the magnetic flux and increasing capacity even several times. Thanks to this, the holder is more durable, resistant, and safer to mount. The bushing with internal thread allows easy screwing of any element (bolt, hook, handle).
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. 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). With thin sheets (e.g., car body, fridge casing), the force will be much smaller because steel cannot absorb the entire magnetic field. For side detachment (sliding), the force is only approx. 1/3 of nominal capacity.
The housing has anti-corrosion protection in the form of galvanic zinc or nickel plating. 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 neodymium magnets.

Strengths

Besides their tremendous field intensity, neodymium magnets offer the following advantages:
  • They do not lose strength, even over around 10 years – the decrease in lifting capacity is only ~1% (theoretically),
  • They retain their magnetic properties even under close interference source,
  • In other words, due to the reflective finish of gold, the element looks attractive,
  • Magnetic induction on the working layer of the magnet turns out to be strong,
  • Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
  • Thanks to versatility in designing and the ability to customize to specific needs,
  • Universal use in modern industrial fields – they are utilized in HDD drives, motor assemblies, medical equipment, and industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which allows their use in miniature devices

Limitations

Disadvantages of NdFeB magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a special holder, which not only secures them against impacts but also raises their durability
  • Neodymium magnets decrease their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • They rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Limited ability of producing threads in the magnet and complex forms - recommended is cover - magnet mounting.
  • Potential hazard resulting from small fragments of magnets are risky, when accidentally swallowed, which becomes key in the context of child safety. It is also worth noting that tiny parts of these devices can disrupt the diagnostic process medical when they are in the body.
  • With large orders the cost of neodymium magnets is economically unviable,

Holding force characteristics

Maximum lifting capacity of the magnetwhat it depends on?

The specified lifting capacity represents the peak performance, obtained under ideal test conditions, specifically:
  • using a plate made of mild steel, functioning as a magnetic yoke
  • with a cross-section no less than 10 mm
  • with an polished touching surface
  • under conditions of ideal adhesion (metal-to-metal)
  • under axial force vector (90-degree angle)
  • in stable room temperature

Lifting capacity in practice – influencing factors

Please note that the magnet holding will differ depending on elements below, in order of importance:
  • Gap (between the magnet and the metal), because even a tiny distance (e.g. 0.5 mm) results in a reduction in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
  • Loading method – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
  • Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Plate material – low-carbon steel gives the best results. Alloy admixtures reduce magnetic permeability and holding force.
  • Smoothness – ideal contact is possible only on polished steel. Rough texture create air cushions, weakening the magnet.
  • Thermal factor – hot environment weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas under parallel forces the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the load capacity.

Warnings
Finger safety

Big blocks can break fingers in a fraction of a second. Never place your hand between two strong magnets.

Power loss in heat

Avoid heat. NdFeB magnets are susceptible to heat. If you require resistance above 80°C, look for special high-temperature series (H, SH, UH).

Beware of splinters

Despite the nickel coating, neodymium is brittle and cannot withstand shocks. Do not hit, as the magnet may crumble into hazardous fragments.

Dust is flammable

Mechanical processing of neodymium magnets carries a risk of fire risk. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Warning for heart patients

Individuals with a heart stimulator have to keep an absolute distance from magnets. The magnetism can interfere with the functioning of the life-saving device.

Product not for children

Product intended for adults. Tiny parts can be swallowed, causing intestinal necrosis. Keep away from children and animals.

Threat to navigation

Be aware: rare earth magnets produce a field that confuses sensitive sensors. Keep a safe distance from your mobile, tablet, and navigation systems.

Allergy Warning

Studies show that nickel (the usual finish) is a common allergen. If you have an allergy, prevent direct skin contact or select coated magnets.

Safe operation

Before use, read the rules. Sudden snapping can break the magnet or hurt your hand. Think ahead.

Safe distance

Do not bring magnets close to a purse, laptop, or TV. The magnetism can irreversibly ruin these devices and wipe information from cards.

Caution! Need more info? Read our article: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98