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UMGZ 16x13x5 [M4] GZ / N38 - magnetic holder external thread

magnetic holder external thread

Catalog no 190321

GTIN/EAN: 5906301813804

5.00

Diameter Ø

16 mm [±1 mm]

Height

13 mm [±1 mm]

Height

5 mm [±1 mm]

Weight

7 g

Load capacity

5.00 kg / 49.03 N

Coating

[NiCuNi] Nickel

see properties »

3.89 ZŁ with VAT / pcs + price for transport

3.16 ZŁ net + 23% VAT / pcs

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Specifications and appearance of a neodymium magnet can be calculated on our power calculator.

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Technical specification - UMGZ 16x13x5 [M4] GZ / N38 - magnetic holder external thread

Specification / characteristics - UMGZ 16x13x5 [M4] GZ / N38 - magnetic holder external thread

properties
properties values
Cat. no. 190321
GTIN/EAN 5906301813804
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 16 mm [±1 mm]
Height 13 mm [±1 mm]
Height 5 mm [±1 mm]
Weight 7 g
Load capacity ~ ? 5.00 kg / 49.03 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGZ 16x13x5 [M4] GZ / N38 - 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
Technical and environmental data
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: 190321-2026
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Pulling force
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It is a ready-made mounting element that allows quick creation of a magnetic point. Mounting consists of inserting the screw into the hole and securing with a nut (e.g., wing nut). Used for mounting sensors, panels, plates, and exhibition elements.
Too strong tightening with a wrench can cause the stud to rotate in the cup or strip the thread. Do not use the magnet as a structural bolt transferring huge mechanical loads in shear. The construction is durable and adapted to industrial conditions.
Maximum operating temperature is 80 degrees Celsius for the standard version. We also offer holders made of ferrite magnets (resistant up to 200°C) or special high-temperature versions. Avoid mounting directly on hot engine or machine components.
Holders are equipped with standard metric threads (e.g., M4, M6, M8, M10). Ensure thread length is sufficient to pass through the hole in your material and tighten the nut. The thread is made of galvanized steel, ensuring corrosion resistance.
Thanks to shielding the sides and top, all magnet power is directed downwards, giving higher capacity than a bare magnet. However, such a system works point-wise and requires direct contact with metal.

Pros as well as cons of neodymium magnets.

Advantages

Besides their tremendous pulling force, neodymium magnets offer the following advantages:
  • They have unchanged lifting capacity, and over more than ten years their attraction force decreases symbolically – ~1% (according to theory),
  • They have excellent resistance to weakening of magnetic properties as a result of opposing magnetic fields,
  • The use of an metallic finish of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • Magnets are distinguished by excellent magnetic induction on the 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 flexibility in forming and the capacity to modify to individual projects,
  • Key role in electronics industry – they serve a role in hard drives, electric motors, medical equipment, and industrial machines.
  • Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,

Cons

Drawbacks and weaknesses of neodymium magnets and proposals for their use:
  • They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only shields the magnet but also improves its resistance to damage
  • When exposed to high temperature, neodymium magnets experience a drop in force. 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 rust. Therefore while using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • We suggest a housing - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complicated forms.
  • Potential hazard to health – tiny shards of magnets are risky, if swallowed, which is particularly important in the context of child safety. Furthermore, small components of these magnets can complicate diagnosis medical when they are in the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Best holding force of the magnet in ideal parameters – what affects it?

Holding force of 5.00 kg is a result of laboratory testing performed under standard conditions:
  • with the contact of a yoke made of special test steel, guaranteeing maximum field concentration
  • with a thickness of at least 10 mm
  • with an polished contact surface
  • under conditions of gap-free contact (metal-to-metal)
  • for force acting at a right angle (in the magnet axis)
  • in neutral thermal conditions

Magnet lifting force in use – key factors

In real-world applications, the real power results from several key aspects, presented from the most important:
  • Clearance – the presence of foreign body (rust, tape, gap) acts as an insulator, which reduces power steeply (even by 50% at 0.5 mm).
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the maximum value.
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
  • Steel type – mild steel attracts best. Alloy admixtures decrease magnetic properties and lifting capacity.
  • Surface quality – the more even the surface, the larger the contact zone and stronger the hold. Roughness creates an air distance.
  • Operating temperature – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and at low temperatures gain strength (up to a certain limit).

Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under shearing force the holding force is lower. Additionally, even a minimal clearance between the magnet and the plate decreases the load capacity.

Precautions when working with neodymium magnets
Respect the power

Use magnets with awareness. Their powerful strength can surprise even experienced users. Stay alert and do not underestimate their power.

Finger safety

Risk of injury: The pulling power is so great that it can result in blood blisters, pinching, and even bone fractures. Use thick gloves.

Allergy Warning

Certain individuals experience a sensitization to nickel, which is the standard coating for NdFeB magnets. Frequent touching can result in an allergic reaction. We recommend use protective gloves.

Safe distance

Data protection: Strong magnets can damage data carriers and sensitive devices (pacemakers, hearing aids, timepieces).

Eye protection

Beware of splinters. Magnets can fracture upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.

Product not for children

Neodymium magnets are not toys. Accidental ingestion of a few magnets may result in them pinching intestinal walls, which poses a severe health hazard and requires urgent medical intervention.

Combustion hazard

Machining of neodymium magnets poses a fire risk. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Medical implants

Patients with a heart stimulator have to maintain an absolute distance from magnets. The magnetic field can interfere with the functioning of the implant.

Power loss in heat

Control the heat. Exposing the magnet to high heat will ruin its properties and pulling force.

Magnetic interference

Be aware: rare earth magnets produce a field that interferes with precision electronics. Maintain a separation from your mobile, tablet, and navigation systems.

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