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UMGW 42x20x9 [M6] GW / N38 - magnetic holder internal thread

magnetic holder internal thread

Catalog no 180320

GTIN/EAN: 5906301813767

5.00
Load capacity 66.00 kg / 647.24 N
Diameter Ø
42 mm [±1 mm]
Height
20 mm [±1 mm]
Height
9 mm [±1 mm]
Weight
78 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel
view properties »

33.95 zł with VAT / pcs + price for transport

27.60 zł net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety
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Physical properties - UMGW 42x20x9 [M6] GW / N38 - magnetic holder internal thread

Specification / characteristics - UMGW 42x20x9 [M6] GW / N38 - magnetic holder internal thread

properties
properties values
Cat. no. 180320
GTIN/EAN 5906301813767
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 42 mm [±1 mm]
Height 20 mm [±1 mm]
Height 9 mm [±1 mm]
Weight 78 g
Magnetization Direction ↑ axial
Load capacity ~ ? 66.00 kg / 647.24 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGW 42x20x9 [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
Engineering data and GPSR

Material specification

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: 180320-2026
Measurement Calculator

Force (pull)

Magnetic Induction

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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. 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).
Too long a screw can pass through the bushing and push out or damage the magnet glued into the bottom of the cup. We recommend checking thread depth before assembly and shortening the screw if necessary. You can use a spacer washer or lock nut to limit screwing depth.
They are used for fixing sensors, lamps, rating plates, machine guards, and installations. They enable creating demountable connections that can be easily moved. In the workshop, they can serve as mounting points for tools or measuring instruments.
This value applies to perfect adherence with the entire magnet surface. On a thin surface or painted cabinet, the magnet will hold much weaker (even by 50-70%). For side detachment (sliding), the force is only approx. 1/3 of nominal capacity.
Standard coating effectively protects against moisture in indoor conditions. In rain and frost, the coating may degrade over time if not protected. The whole is well protected for standard workshop and industrial applications.

Advantages and disadvantages of rare earth magnets.

Pros

Besides their stability, neodymium magnets are valued for these benefits:
  • Their strength is maintained, and after around ten years it decreases only by ~1% (according to research),
  • They maintain their magnetic properties even under strong external field,
  • A magnet with a metallic gold surface looks better,
  • The surface of neodymium magnets generates a unique magnetic field – this is a distinguishing feature,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • In view of the possibility of precise forming and customization to unique projects, magnetic components can be created in a wide range of geometric configurations, which expands the range of possible applications,
  • Key role in modern technologies – they serve a role in data components, electromotive mechanisms, advanced medical instruments, as well as complex engineering applications.
  • Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Limitations

Problematic aspects of neodymium magnets: weaknesses and usage proposals
  • At strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium 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
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
  • Limited possibility of creating threads in the magnet and complex forms - recommended is a housing - 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. Additionally, small components of these magnets can disrupt the diagnostic process medical when they are in the body.
  • With budget limitations the cost of neodymium magnets is economically unviable,

Pull force analysis

Optimal lifting capacity of a neodymium magnet – what contributes to it?

Breakaway force is the result of a measurement for the most favorable conditions, including:
  • on a base made of mild steel, optimally conducting the magnetic flux
  • possessing a massiveness of minimum 10 mm to ensure full flux closure
  • with a plane perfectly flat
  • under conditions of gap-free contact (metal-to-metal)
  • under vertical force vector (90-degree angle)
  • at standard ambient temperature

Determinants of practical lifting force of a magnet

Bear in mind that the magnet holding may be lower depending on elements below, in order of importance:
  • Space between surfaces – every millimeter of separation (caused e.g. by varnish or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Direction of force – maximum parameter is obtained only during pulling at a 90° angle. The shear force of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Chemical composition of the base – mild steel gives the best results. Alloy steels lower magnetic properties and holding force.
  • Smoothness – full contact is possible only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
  • Temperature – temperature increase causes a temporary drop of induction. Check the thermal limit for a given model.

Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under shearing force the lifting capacity is smaller. In addition, even a minimal clearance between the magnet’s surface and the plate decreases the holding force.

H&S for magnets
Magnet fragility

Protect your eyes. Magnets can explode upon uncontrolled impact, launching sharp fragments into the air. We recommend safety glasses.

ICD Warning

For implant holders: Powerful magnets affect medical devices. Maintain minimum 30 cm distance or request help to handle the magnets.

Crushing risk

Watch your fingers. Two large magnets will join immediately with a force of massive weight, crushing everything in their path. Be careful!

Impact on smartphones

A powerful magnetic field negatively affects the operation of magnetometers in smartphones and GPS navigation. Maintain magnets close to a smartphone to avoid damaging the sensors.

Allergic reactions

Medical facts indicate that the nickel plating (standard magnet coating) is a potent allergen. If you have an allergy, avoid direct skin contact or opt for coated magnets.

Keep away from computers

Powerful magnetic fields can destroy records on payment cards, HDDs, and other magnetic media. Maintain a gap of min. 10 cm.

Keep away from children

Absolutely keep magnets out of reach of children. Risk of swallowing is high, and the effects of magnets connecting inside the body are very dangerous.

Dust explosion hazard

Drilling and cutting of neodymium magnets poses a fire hazard. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Handling rules

Before starting, read the rules. Sudden snapping can destroy the magnet or injure your hand. Think ahead.

Heat sensitivity

Regular neodymium magnets (grade N) lose magnetization when the temperature goes above 80°C. Damage is permanent.

Warning! Learn more about risks in the article: Safety of working with magnets.