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UMGZ 42x20x9 [M8] GZ / N38 - magnetic holder external thread

magnetic holder external thread

Catalog no 190332

GTIN/EAN: 5906301813859

5.00

Diameter Ø

42 mm [±1 mm]

Height

20 mm [±1 mm]

Height

9 mm [±1 mm]

Weight

80 g

Load capacity

66.00 kg / 647.24 N

Coating

[NiCuNi] Nickel

product specifications »

33.96 ZŁ with VAT / pcs + price for transport

27.61 ZŁ net + 23% VAT / pcs

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Contact us by phone +48 22 499 98 98 if you prefer drop us a message using request form the contact form page.
Specifications along with appearance of magnets can be reviewed on our force calculator.

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Technical of the product - UMGZ 42x20x9 [M8] GZ / N38 - magnetic holder external thread

Specification / characteristics - UMGZ 42x20x9 [M8] GZ / N38 - magnetic holder external thread

properties
properties values
Cat. no. 190332
GTIN/EAN 5906301813859
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 80 g
Load capacity ~ ? 66.00 kg / 647.24 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGZ 42x20x9 [M8] 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
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%
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: 190332-2026
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A magnet with a built-in screw is great for screwing with a nut to housings, profiles, and flat bars. Thanks to this, you get a solid, magnetized mounting point without welding or gluing. Used for mounting sensors, panels, plates, and exhibition elements.
The threaded stud is an integral part of the steel housing, but avoid overtightening the thread. When assembling, use a torque wrench or tighten with feeling. The construction is durable and adapted to industrial conditions.
Above this temperature, the magnet may irreversibly lose some of its power. 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). Stud length varies depending on the model (usually from 8 to 15 mm). It is a solid threaded connection, ready for use.
Thanks to shielding the sides and top, all magnet power is directed downwards, giving higher capacity than a bare magnet. It is a solution optimized for strong holding with direct contact, not attracting from afar.

Strengths and weaknesses of Nd2Fe14B magnets.

Benefits

Apart from their superior magnetic energy, neodymium magnets have these key benefits:
  • They do not lose power, even over approximately ten years – the reduction in power is only ~1% (theoretically),
  • They are extremely resistant to demagnetization induced by external magnetic fields,
  • A magnet with a metallic gold surface looks better,
  • Magnets exhibit exceptionally strong magnetic induction on the outer layer,
  • 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...
  • Considering the possibility of precise shaping and customization to custom needs, magnetic components can be produced in a variety of forms and dimensions, which amplifies use scope,
  • Versatile presence in electronics industry – they serve a role in HDD drives, drive modules, advanced medical instruments, as well as modern systems.
  • Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Cons

Drawbacks and weaknesses of neodymium magnets: tips and applications.
  • They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
  • When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
  • We suggest casing - magnetic mechanism, due to difficulties in producing threads inside the magnet and complex shapes.
  • Health risk related to microscopic parts of magnets are risky, if swallowed, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these devices are able to disrupt the diagnostic process medical in case of swallowing.
  • With mass production the cost of neodymium magnets can be a barrier,

Holding force characteristics

Magnetic strength at its maximum – what it depends on?

Holding force of 66.00 kg is a result of laboratory testing performed under specific, ideal conditions:
  • using a plate made of low-carbon steel, functioning as a magnetic yoke
  • possessing a massiveness of minimum 10 mm to ensure full flux closure
  • with an ideally smooth contact surface
  • under conditions of gap-free contact (surface-to-surface)
  • for force applied at a right angle (pull-off, not shear)
  • in stable room temperature

Lifting capacity in real conditions – factors

In real-world applications, the real power depends on several key aspects, presented from crucial:
  • Clearance – the presence of foreign body (rust, dirt, gap) acts as an insulator, which lowers capacity steeply (even by 50% at 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 maximum force).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of converting into lifting capacity.
  • Steel type – mild steel gives the best results. Higher carbon content decrease magnetic permeability and lifting capacity.
  • Plate texture – ground elements ensure maximum contact, which improves force. Uneven metal weaken the grip.
  • Temperature influence – hot environment weakens pulling force. Too high temperature can permanently demagnetize the magnet.

Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under attempts to slide the magnet the lifting capacity is smaller. In addition, even a minimal clearance between the magnet and the plate decreases the holding force.

Warnings
Keep away from electronics

Remember: rare earth magnets produce a field that confuses precision electronics. Maintain a separation from your phone, device, and GPS.

Eye protection

Neodymium magnets are sintered ceramics, which means they are prone to chipping. Impact of two magnets will cause them breaking into small pieces.

Heat sensitivity

Watch the temperature. Heating the magnet above 80 degrees Celsius will destroy its properties and pulling force.

Allergy Warning

Certain individuals experience a hypersensitivity to nickel, which is the typical protective layer for neodymium magnets. Frequent touching might lead to dermatitis. We suggest use safety gloves.

No play value

Neodymium magnets are not suitable for play. Accidental ingestion of multiple magnets can lead to them attracting across intestines, which constitutes a critical condition and necessitates urgent medical intervention.

Pinching danger

Protect your hands. Two powerful magnets will join immediately with a force of massive weight, destroying everything in their path. Be careful!

Data carriers

Powerful magnetic fields can erase data on payment cards, hard drives, and storage devices. Keep a distance of at least 10 cm.

Life threat

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

Respect the power

Exercise caution. Neodymium magnets attract from a distance and connect with huge force, often faster than you can move away.

Dust explosion hazard

Mechanical processing of neodymium magnets poses a fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Caution! Looking for details? Check our post: Why are neodymium magnets dangerous?