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UMGZ 48x24x11.5 [M8] GZ / N38 - magnetic holder external thread

magnetic holder external thread

Catalog no 190415

GTIN/EAN: 5906301813866

5.00
Load capacity 80.00 kg / 784.53 N
Diameter Ø
48 mm [±1 mm]
Height
24 mm [±1 mm]
Height
11.5 mm [±1 mm]
Weight
140 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

view specifications »

48.70 zł net / pcs

59.90 zł with VAT (23% VAT) / pcs

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59.90 zł
price from 10 pcs
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Frequently asked questions

Which magnetic holder is suitable for moving metal parts in a workshop?
Choose a device designed for the intended handling task and check its rated conditions, attachment point and the steel being gripped. A basic permanent-magnet holder is not a certified device for lifting a load over people.
How do I choose a holder for hanging a heavy item and check its real grip?
Compare the catalogue pull rating with the actual steel thickness, surface condition, gap and load direction. Grip along a vertical surface differs from perpendicular pull. Add an independent mechanical safeguard where falling would cause harm.
Which magnetic holders can be used outdoors?
Check the coating, housing and permitted operating conditions on the individual product card. Rubber can help protect a painted surface, but do not assume that every holder is suitable for permanent immersion or salt spray.
How should I choose a strong threaded holder for field work?
Select an internal or external thread to match the part being attached. Then check the holder dimensions, pull rating, surface condition and moisture protection. Dirt and gaps can reduce practical grip.

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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Physical properties - UMGZ 48x24x11.5 [M8] GZ / N38 - magnetic holder external thread

Specification / characteristics - UMGZ 48x24x11.5 [M8] GZ / N38 - magnetic holder external thread

properties
properties values
Cat. no. 190415
GTIN/EAN 5906301813866
Distributor Dhit sp. z o.o.
Country of origin Poland / China / Germany
Customs code 85059029
Diameter Ø 48 mm [±1 mm]
Height 24 mm [±1 mm]
Height 11.5 mm [±1 mm]
Weight 140 g
Magnetization Direction ↑ axial
Load capacity ~ ? 80.00 kg / 784.53 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGZ 48x24x11.5 [M8] GZ / N38 - 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

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%

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: 190415-2026
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This type of holder has a protruding threaded stud (screw), making it ideal for mounting in through holes. Mounting consists of inserting the screw into the hole and securing with a nut (e.g., wing nut). They are commonly used in machine building, exhibition stands, lighting, and advertising.
Too strong tightening with a wrench can cause the stud to rotate in the cup or strip the thread. When assembling, use a torque wrench or tighten with feeling. The construction is durable and adapted to industrial conditions.
Maximum operating temperature is 80 degrees Celsius for the standard version. If you need resistance to higher temperatures, ask about special versions (H, SH). Avoid mounting directly on hot engine or machine components.
We use standardized threads that fit typical nuts available in every store. Exact screw dimensions can be found in the product technical table. The thread is made of galvanized steel, ensuring corrosion resistance.
The magnetic system in a cup is more energy-efficient than the magnet itself of the same dimensions. This force drops very quickly with increasing distance (air gap).

Pros as well as cons of neodymium magnets.

Benefits

Besides their remarkable field intensity, neodymium magnets offer the following advantages:
  • They retain full power for nearly ten years – the loss is just ~1% (according to analyses),
  • They are resistant to demagnetization induced by external field influence,
  • By using a smooth layer of gold, the element gains an aesthetic look,
  • Magnets are distinguished by very high magnetic induction on the outer side,
  • Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
  • Thanks to versatility in constructing and the ability to customize to individual projects,
  • Fundamental importance in future technologies – they are commonly used in magnetic memories, motor assemblies, diagnostic systems, also other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which enables their usage in compact constructions

Limitations

What to avoid - cons of neodymium magnets: tips and applications.
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a special holder, which not only secures them against impacts but also raises their durability
  • Do not exceed this material temperature limit: 80°C. Overheating may permanently weaken the magnet.
  • When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
  • Due to limitations in realizing nuts and complex forms in magnets, we recommend using casing - magnetic mount.
  • Health risk to health – tiny shards of magnets are risky, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that small components of these devices are able to complicate diagnosis medical in case of swallowing.
  • Due to expensive raw materials, their price is relatively high,

Pull force analysis

Maximum lifting force for a neodymium magnet – what contributes to it?

Magnet power is the result of a measurement for ideal contact conditions, including:
  • using a sheet made of mild steel, functioning as a magnetic yoke
  • with a thickness minimum 10 mm
  • with a surface free of scratches
  • with zero gap (no impurities)
  • for force applied at a right angle (pull-off, not shear)
  • at ambient temperature room level

Determinants of lifting force in real conditions

In practice, the real power is determined by many variables, listed from most significant:
  • Clearance – existence of any layer (paint, tape, gap) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
  • Force direction – catalog parameter refers to pulling vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Plate material – low-carbon steel attracts best. Alloy admixtures reduce magnetic properties and holding force.
  • Surface quality – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
  • Thermal environment – heating the magnet results in weakening of induction. It is worth remembering the thermal limit for a given model.

Lifting capacity was assessed using a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, however under parallel forces the holding force is lower. Additionally, even a slight gap between the magnet’s surface and the plate lowers the load capacity.

H&S for magnets
Permanent damage

Do not exceed the maximum operating temperature stated in the specifications of the particular product. The limit depends on the material, geometry and operating arrangement; there is no single threshold for all neodymium magnets. Overheating can permanently weaken a magnet.

Choking Hazard

These products are not intended for children. Eating a few magnets can lead to them pinching intestinal walls, which poses a direct threat to life and necessitates urgent medical intervention.

Compass and GPS

A strong magnetic field disrupts the operation of compasses in smartphones and navigation systems. Keep magnets close to a smartphone to avoid damaging the sensors.

Combustion hazard

Dust created during cutting of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.

Threat to electronics

Data protection: Strong magnets can damage payment cards and sensitive devices (pacemakers, medical aids, mechanical watches).

Skin irritation risks

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If skin irritation appears, immediately stop handling magnets and use protective gear.

Caution required

Handle magnets with awareness. Their powerful strength can surprise even professionals. Be vigilant and respect their force.

Magnets are brittle

Despite metallic appearance, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.

Bodily injuries

Risk of injury: The pulling power is so immense that it can result in blood blisters, pinching, and even bone fractures. Protective gloves are recommended.

Health Danger

Warning for patients: Strong magnetic fields affect medical devices. Maintain minimum 30 cm distance or request help to handle the magnets.

Important! Details about risks in the article: Safety of working with magnets.