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UMGGZ 34x6 [M4] GZ / N38 - rubber magnetic holder external thread

rubber magnetic holder external thread

Catalog no 340311

GTIN/EAN: 5906301814733

5.00

Diameter Ø

34 mm [±1 mm]

Height

6 mm [±1 mm]

Weight

26 g

Load capacity

7.70 kg / 75.51 N

9.84 with VAT / pcs + price for transport

8.00 ZŁ net + 23% VAT / pcs

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Product card - UMGGZ 34x6 [M4] GZ / N38 - rubber magnetic holder external thread

Specification / characteristics - UMGGZ 34x6 [M4] GZ / N38 - rubber magnetic holder external thread

properties
properties values
Cat. no. 340311
GTIN/EAN 5906301814733
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 34 mm [±1 mm]
Height 6 mm [±1 mm]
Weight 26 g
Load capacity ~ ? 7.70 kg / 75.51 N
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGGZ 34x6 [M4] 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 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%
Environmental data
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: 340311-2026
Measurement Calculator
Force (pull)

Magnetic Field

Other offers

The protruding thread allows instant screwing of a lamp or holder using a nut. It is a safe and durable mounting without drilling holes in the bodywork.
Yes, these holders are completely resistant to weather conditions thanks to the hermetic Santoprene rubber coating. This is the best, professional solution for mounting on a vehicle roof.
Rubberized holders are the safest choice for painted surfaces. However, it is worth remembering to wipe the roof of dust and sand before mounting so that it does not get under the magnet.
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.
Rubber creates a distance between the magnet and metal, which slightly reduces perpendicular attraction force but drastically increases friction force. Holding force depends on the roof sheet thickness.

Advantages and disadvantages of rare earth magnets.

Advantages

Apart from their consistent holding force, neodymium magnets have these key benefits:
  • They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
  • Magnets very well protect themselves against demagnetization caused by foreign field sources,
  • By using a smooth coating of nickel, the element presents an professional look,
  • Magnetic induction on the working part of the magnet remains exceptional,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Due to the potential of accurate molding and adaptation to unique requirements, neodymium magnets can be created in a variety of shapes and sizes, which expands the range of possible applications,
  • Significant place in high-tech industry – they are utilized in data components, electric motors, advanced medical instruments, and multitasking production systems.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Cons

Characteristics of disadvantages of neodymium magnets: weaknesses and usage proposals
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a strong case, which not only secures them against impacts but also increases their durability
  • When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • We suggest a housing - magnetic holder, due to difficulties in realizing threads inside the magnet and complicated shapes.
  • Health risk resulting from small fragments of magnets pose a threat, if swallowed, which is particularly important in the context of child health protection. Additionally, small elements of these products are able to be problematic in diagnostics medical after entering the body.
  • With budget limitations the cost of neodymium magnets is economically unviable,

Lifting parameters

Breakaway strength of the magnet in ideal conditionswhat affects it?

Holding force of 7.70 kg is a measurement result conducted under the following configuration:
  • on a plate made of structural steel, optimally conducting the magnetic flux
  • with a thickness minimum 10 mm
  • characterized by even structure
  • without any clearance between the magnet and steel
  • for force applied at a right angle (in the magnet axis)
  • at standard ambient temperature

Impact of factors on magnetic holding capacity in practice

Real force impacted by working environment parameters, mainly (from most important):
  • Distance – the presence of any layer (rust, tape, gap) acts as an insulator, which reduces capacity rapidly (even by 50% at 0.5 mm).
  • Load vector – maximum parameter is available only during perpendicular pulling. The shear force of the magnet along the surface is usually several times smaller (approx. 1/5 of the lifting capacity).
  • Base massiveness – too thin plate does not accept the full field, causing part of the power to be escaped to the other side.
  • Material type – the best choice is pure iron steel. Stainless steels may attract less.
  • Surface quality – the more even the plate, the better the adhesion and stronger the hold. Roughness creates an air distance.
  • Temperature – heating the magnet results in weakening of force. Check the maximum operating temperature for a given model.

Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas under attempts to slide the magnet the holding force is lower. Moreover, even a slight gap between the magnet and the plate decreases the holding force.

H&S for magnets
Heat warning

Keep cool. Neodymium magnets are sensitive to temperature. If you require operation above 80°C, inquire about HT versions (H, SH, UH).

Safe distance

Avoid bringing magnets near a wallet, laptop, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.

Medical implants

For implant holders: Strong magnetic fields affect electronics. Keep minimum 30 cm distance or ask another person to handle the magnets.

GPS Danger

A powerful magnetic field negatively affects the operation of magnetometers in smartphones and navigation systems. Do not bring magnets close to a smartphone to prevent breaking the sensors.

Safe operation

Handle with care. Rare earth magnets attract from a long distance and connect with massive power, often quicker than you can react.

Do not give to children

NdFeB magnets are not intended for children. Accidental ingestion of several magnets may result in them attracting across intestines, which constitutes a severe health hazard and requires immediate surgery.

Sensitization to coating

It is widely known that nickel (the usual finish) is a potent allergen. For allergy sufferers, refrain from direct skin contact or choose versions in plastic housing.

Finger safety

Watch your fingers. Two large magnets will snap together instantly with a force of massive weight, destroying everything in their path. Be careful!

Material brittleness

Watch out for shards. Magnets can explode upon uncontrolled impact, ejecting shards into the air. Eye protection is mandatory.

Fire warning

Powder produced during grinding of magnets is flammable. Avoid drilling into magnets unless you are an expert.

Warning! Need more info? Check our post: Why are neodymium magnets dangerous?