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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
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

product parameters »

48.70 zł net / pcs

59.90 zł with VAT (23% VAT) / pcs

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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

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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 of the product - 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
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 48 mm [±1 mm]
Height 24 mm [±1 mm]
Height 11.5 mm [±1 mm]
Weight 140 g
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
Technical specification and ecology

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%

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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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.
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.
Maximum operating temperature is 80 degrees Celsius for the standard version. For furnaces, dryers, and powder coating shops, we recommend other types of magnets. Avoid mounting directly on hot engine or machine components.
Holders are equipped with standard metric threads (e.g., M4, M6, M8, M10). Exact screw dimensions can be found in the product technical table. 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.

Advantages and disadvantages of Nd2Fe14B magnets.

Strengths

Apart from their strong magnetism, neodymium magnets have these key benefits:
  • They do not lose magnetism, even during nearly 10 years – the decrease in lifting capacity is only ~1% (based on measurements),
  • They are extremely resistant to demagnetization induced by external magnetic fields,
  • A magnet with a smooth silver surface is more attractive,
  • The surface of neodymium magnets generates a unique magnetic field – this is one of their assets,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Possibility of custom creating and adjusting to precise applications,
  • Huge importance in electronics industry – they are utilized in data components, drive modules, diagnostic systems, and technologically advanced constructions.
  • Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Cons

Cons of neodymium magnets and proposals for their use:
  • Brittleness 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 raises their durability
  • Neodymium magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in realizing threads and complex shapes in magnets, we recommend using a housing - magnetic mount.
  • Health risk resulting from small fragments of magnets pose a threat, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Additionally, small components of these magnets can disrupt the diagnostic process medical in case of swallowing.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Pull force analysis

Highest magnetic holding force – what contributes to it?

The load parameter shown represents the peak performance, measured under ideal test conditions, namely:
  • using a base made of low-carbon steel, functioning as a circuit closing element
  • whose transverse dimension is min. 10 mm
  • with an polished touching surface
  • under conditions of ideal adhesion (metal-to-metal)
  • during pulling in a direction vertical to the plane
  • in temp. approx. 20°C

Impact of factors on magnetic holding capacity in practice

It is worth knowing that the working load may be lower depending on the following factors, in order of importance:
  • Distance – the presence of foreign body (paint, tape, air) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Load vector – highest force is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is standardly many times smaller (approx. 1/5 of the lifting capacity).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Metal type – not every steel attracts identically. Alloy additives worsen the interaction with the magnet.
  • Base smoothness – the more even the plate, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
  • Heat – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity was assessed by applying a polished steel plate of optimal thickness (min. 20 mm), under vertically applied force, however under parallel forces the holding force is lower. Additionally, even a slight gap between the magnet and the plate reduces the holding force.

Precautions when working with neodymium magnets
ICD Warning

For implant holders: Strong magnetic fields affect medical devices. Keep at least 30 cm distance or ask another person to work with the magnets.

Data carriers

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

Precision electronics

Navigation devices and smartphones are extremely susceptible to magnetism. Direct contact with a strong magnet can ruin the internal compass in your phone.

Allergic reactions

Studies show that the nickel plating (standard magnet coating) is a strong allergen. If your skin reacts to metals, avoid direct skin contact and opt for versions in plastic housing.

Handling rules

Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Think ahead.

Crushing force

Risk of injury: The attraction force is so immense that it can cause blood blisters, crushing, and even bone fractures. Use thick gloves.

Machining danger

Combustion risk: Neodymium dust is highly flammable. Do not process magnets without safety gear as this may cause fire.

Choking Hazard

Always keep magnets out of reach of children. Ingestion danger is high, and the effects of magnets connecting inside the body are life-threatening.

Permanent damage

Standard neodymium magnets (N-type) lose magnetization when the temperature exceeds 80°C. This process is irreversible.

Fragile material

Despite metallic appearance, neodymium is brittle and cannot withstand shocks. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Attention! Details about hazards in the article: Magnet Safety Guide.