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UMGGZ 22x6 [M4] GZ / N38 - rubber magnetic holder external thread

rubber magnetic holder external thread

Catalog no 340310

GTIN/EAN: 5906301814726

5.00
Load capacity 5.10 kg / 50.01 N
Diameter Ø
22 mm [±1 mm]
Height
6 mm [±1 mm]
Weight
15 g

How we measure these parameters — certificates and measurements

see parameters »

6.00 zł net / pcs

7.38 zł with VAT (23% VAT) / pcs

price for transport

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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 parameters - UMGGZ 22x6 [M4] GZ / N38 - rubber magnetic holder external thread

Specification / characteristics - UMGGZ 22x6 [M4] GZ / N38 - rubber magnetic holder external thread

properties
properties values
Cat. no. 340310
GTIN/EAN 5906301814726
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 22 mm [±1 mm]
Height 6 mm [±1 mm]
Weight 15 g
Load capacity ~ ? 5.10 kg / 50.01 N
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGGZ 22x6 [M4] GZ / N38 - rubber magnetic holder external thread
properties values units
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working 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

Chemical composition

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: 340310-2026
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This type of holder is standard when mounting lighting (beacons), antennas, searchlights, and cameras on a car roof. Ideally suited for outdoor, off-road applications and on special vehicles.
It can be safely used outdoors all year round, in rain, snow, and frost. Guarantees no rusty stains on the paint, which happen with regular magnets.
Thanks to the rubber properties, the holder does not slide on the roof, preventing micro-scratches. 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). Allows easy lamp mounting by passing the screw through the hole in the holder and tightening the nut.
Although nominal capacity (e.g., 5.10 kg) is lower than a bare magnet, real adhesion on slippery paint is much better. Model UMGGZ 22x6 [M4] 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 rare earth magnets.

Benefits

Besides their exceptional field intensity, neodymium magnets offer the following advantages:
  • They do not lose magnetism, even during nearly ten years – the drop in lifting capacity is only ~1% (based on measurements),
  • They maintain their magnetic properties even under close interference source,
  • In other words, due to the reflective finish of silver, the element becomes visually attractive,
  • Magnets are characterized by maximum 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 form) at temperatures up to 230°C and above...
  • Thanks to flexibility in shaping and the capacity to adapt to individual projects,
  • Key role in modern technologies – they are commonly used in data components, electric motors, medical devices, as well as multitasking production systems.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

Disadvantages of NdFeB magnets:
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a strong case, which not only secures them against impacts but also raises their durability
  • Neodymium magnets lose their force 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
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
  • We recommend a housing - magnetic mount, due to difficulties in realizing nuts inside the magnet and complicated forms.
  • Possible danger related to microscopic parts of magnets are risky, in case of ingestion, which gains importance in the aspect of protecting the youngest. Furthermore, small components of these products are able to be problematic in diagnostics medical when they are in the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities

Lifting parameters

Maximum magnetic pulling force – what contributes to it?

The force parameter is a theoretical maximum value performed under specific, ideal conditions:
  • on a block made of structural steel, perfectly concentrating the magnetic flux
  • possessing a massiveness of min. 10 mm to avoid saturation
  • with a plane perfectly flat
  • under conditions of no distance (surface-to-surface)
  • under axial force direction (90-degree angle)
  • at room temperature

Lifting capacity in real conditions – factors

Bear in mind that the working load will differ influenced by the following factors, starting with the most relevant:
  • Distance – existence of any layer (paint, dirt, gap) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
  • Loading method – catalog parameter refers to detachment vertically. When applying parallel force, the magnet exhibits significantly lower power (typically approx. 20-30% of nominal force).
  • Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of converting into lifting capacity.
  • Steel grade – ideal substrate is pure iron steel. Stainless steels may attract less.
  • Plate texture – smooth surfaces guarantee perfect abutment, which increases force. Rough surfaces reduce efficiency.
  • Temperature influence – hot environment reduces magnetic field. Too high temperature can permanently damage the magnet.

Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under parallel forces the load capacity is reduced by as much as 5 times. Additionally, even a slight gap between the magnet and the plate lowers the lifting capacity.

Safety rules for work with neodymium magnets
Mechanical processing

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

Physical harm

Large magnets can crush fingers instantly. Under no circumstances put your hand between two strong magnets.

Phone sensors

GPS units and mobile phones are extremely sensitive to magnetism. Direct contact with a strong magnet can decalibrate the sensors in your phone.

Caution required

Handle with care. Rare earth magnets act from a long distance and connect with huge force, often quicker than you can move away.

Medical implants

Life threat: Strong magnets can turn off heart devices and defibrillators. Do not approach if you have medical devices.

Sensitization to coating

Certain individuals have a contact allergy to nickel, which is the standard coating for NdFeB magnets. Extended handling can result in a rash. We recommend wear protective gloves.

Keep away from children

Always keep magnets out of reach of children. Ingestion danger is significant, and the effects of magnets clamping inside the body are tragic.

Eye protection

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

Demagnetization risk

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

Safe distance

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

Important! Want to know more? Read our article: Why are neodymium magnets dangerous?