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UMGGZ 43x6 [M6] GZ / N38 - rubber magnetic holder external thread

rubber magnetic holder external thread

Catalog no 340312

GTIN/EAN: 5906301814740

5.00
Load capacity 8.70 kg / 85.32 N
Diameter Ø
43 mm [±1 mm]
Height
6 mm [±1 mm]
Weight
36 g
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8.50 zł net / pcs

10.46 zł with VAT (23% VAT) / pcs

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Frequently asked questions

How much will a magnetic holder hold in practice?
The catalogue value assumes full contact with smooth steel at least 10 mm thick and a perpendicular pull. Thinner sheet, paint, rust and surface irregularities reduce it considerably: on 1 mm sheet about half remains. Lifting and vertical mounting call for an additional safety margin.
Will a holder work on stainless steel?
Not on austenitic grades 304 and 316 — they are effectively non-magnetic. It will not work on aluminium, copper or brass either. Those materials need a mechanical gripper.
Which coating for which conditions?
Nickel-copper-nickel (NiCuNi) is the standard and covers most applications. Epoxy is used for damp environments and outdoor work, zinc is sufficient for dry interiors. Holders in a steel housing or in rubber also protect the magnet against impact.

Guides from the knowledge base

Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Technical specification of the product - UMGGZ 43x6 [M6] GZ / N38 - rubber magnetic holder external thread

Specification / characteristics - UMGGZ 43x6 [M6] GZ / N38 - rubber magnetic holder external thread

properties
properties values
Cat. no. 340312
GTIN/EAN 5906301814740
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 43 mm [±1 mm]
Height 6 mm [±1 mm]
Weight 36 g
Load capacity ~ ? 8.70 kg / 85.32 N
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGGZ 43x6 [M6] GZ / N38 - rubber 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 310 °C
Curie Temperature TF 590 °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: 340312-2026
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This type of holder is standard when mounting lighting (beacons), antennas, searchlights, and cameras on a car roof. It is a safe and durable mounting without drilling holes in the bodywork.
The magnet is tightly sealed with rubber, which protects it from water, road salt, mud, and corrosion. Guarantees no rusty stains on the paint, which happen with regular magnets.
Rubberized holders are the safest choice for painted surfaces. Rubber has a high coefficient of friction, ensuring stability even with vibrations and wind.
The length of the protruding screw is usually from 8 to 15 mm (you will find the exact dimension in the technical specification). It is a solid threaded connection made of galvanized steel, resistant to breaking.
Although nominal capacity (e.g., 8.70 kg) is lower than a bare magnet, real adhesion on slippery paint is much better. Model UMGGZ 43x6 [M6] GZ / N38 is adapted to hold elements at road speeds if you choose the right number of mounting points.

Pros as well as cons of neodymium magnets.

Pros

Apart from their consistent power, neodymium magnets have these key benefits:
  • They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (in laboratory conditions),
  • Neodymium magnets remain highly resistant to loss of magnetic properties caused by external field sources,
  • In other words, due to the reflective layer of gold, the element gains visual value,
  • Magnets have excellent magnetic induction on the working surface,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Thanks to versatility in constructing and the capacity to adapt to complex applications,
  • Key role in modern industrial fields – they serve a role in hard drives, brushless drives, medical equipment, also complex engineering applications.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Disadvantages

Characteristics of disadvantages of neodymium magnets and ways of using them
  • At very 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 and 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
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • We recommend cover - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complex shapes.
  • Potential hazard related to microscopic parts of magnets are risky, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that small elements of these magnets are able to complicate diagnosis medical when they are in the body.
  • With budget limitations the cost of neodymium magnets can be a barrier,

Pull force analysis

Maximum lifting capacity of the magnet – what it depends on?

The lifting capacity listed is a result of laboratory testing performed under standard conditions:
  • on a block made of mild steel, effectively closing the magnetic field
  • whose transverse dimension equals approx. 10 mm
  • characterized by lack of roughness
  • without the slightest clearance between the magnet and steel
  • during detachment in a direction perpendicular to the mounting surface
  • at ambient temperature approx. 20 degrees Celsius

Determinants of practical lifting force of a magnet

Bear in mind that the magnet holding may be lower subject to elements below, in order of importance:
  • Gap between surfaces – every millimeter of distance (caused e.g. by varnish or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Force direction – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
  • Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Material type – the best choice is pure iron steel. Stainless steels may generate lower lifting capacity.
  • Surface condition – ground elements guarantee perfect abutment, which improves field saturation. Rough surfaces reduce efficiency.
  • Thermal factor – hot environment weakens magnetic field. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under perpendicular forces, in contrast under attempts to slide the magnet the load capacity is reduced by as much as 5 times. In addition, even a slight gap between the magnet and the plate decreases the load capacity.

Precautions when working with neodymium magnets
This is not a toy

These products are not suitable for play. Eating multiple magnets can lead to them pinching intestinal walls, which constitutes a critical condition and requires immediate surgery.

Operating temperature

Control the heat. Exposing the magnet above 80 degrees Celsius will destroy its properties and pulling force.

Warning for allergy sufferers

Studies show that the nickel plating (standard magnet coating) is a common allergen. If you have an allergy, prevent touching magnets with bare hands or choose versions in plastic housing.

Life threat

Medical warning: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have medical devices.

Risk of cracking

Watch out for shards. Magnets can explode upon violent connection, ejecting sharp fragments into the air. Eye protection is mandatory.

Fire warning

Powder created during cutting of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.

Crushing risk

Watch your fingers. Two large magnets will join instantly with a force of several hundred kilograms, crushing anything in their path. Be careful!

Data carriers

Avoid bringing magnets near a wallet, laptop, or TV. The magnetism can permanently damage these devices and erase data from cards.

Handling rules

Be careful. Neodymium magnets attract from a long distance and snap with huge force, often faster than you can move away.

Compass and GPS

A strong magnetic field disrupts the functioning of compasses in phones and navigation systems. Keep magnets close to a device to avoid breaking the sensors.

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