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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
see parameters »

48.70 zł net / pcs

59.90 zł with VAT (23% VAT) / pcs

price for transport

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Gross
price from 1 pcs
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59.90 zł
price from 10 pcs
45.78 zł
56.31 zł
price from 20 pcs
42.86 zł
52.71 zł

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

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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Technical - 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
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 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

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%

Sustainability

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). They are commonly used in machine building, exhibition stands, lighting, and advertising.
The screw is solidly seated in the cup, however, moderation must be maintained when tightening the nut. 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. Remember that even momentary overheating can weaken the holder.
Thread size (e.g., M6) is always given in the product name and technical specification. Stud length varies depending on the model (usually from 8 to 15 mm). It is a solid threaded connection, ready for use.
The magnetic system in a cup is more energy-efficient than the magnet itself of the same dimensions. It is a solution optimized for strong holding with direct contact, not attracting from afar.

Strengths as well as weaknesses of Nd2Fe14B magnets.

Benefits

Besides their remarkable pulling force, neodymium magnets offer the following advantages:
  • They virtually do not lose strength, because even after ten years the performance loss is only ~1% (in laboratory conditions),
  • They have excellent resistance to magnetic field loss as a result of external magnetic sources,
  • By using a lustrous coating of gold, the element presents an professional look,
  • They show high magnetic induction at the operating surface, which affects their effectiveness,
  • 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...
  • Possibility of exact shaping and adapting to defined requirements,
  • Key role in high-tech industry – they are utilized in magnetic memories, drive modules, advanced medical instruments, as well as multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which enables their usage in small systems

Weaknesses

What to avoid - cons of neodymium magnets: weaknesses and usage proposals
  • At strong impacts they can crack, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • They oxidize in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in creating nuts and complicated forms in magnets, we propose using casing - magnetic holder.
  • Possible danger to health – tiny shards of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child health protection. Additionally, small components of these devices are able to be problematic in diagnostics medical after entering the body.
  • With large orders the cost of neodymium magnets is economically unviable,

Pull force analysis

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

The declared magnet strength represents the limit force, recorded under laboratory conditions, meaning:
  • on a block made of structural steel, optimally conducting the magnetic flux
  • possessing a thickness of at least 10 mm to ensure full flux closure
  • with a surface cleaned and smooth
  • without any clearance between the magnet and steel
  • during detachment in a direction perpendicular to the mounting surface
  • in stable room temperature

Impact of factors on magnetic holding capacity in practice

It is worth knowing that the magnet holding will differ subject to the following factors, in order of importance:
  • Space between surfaces – even a fraction of a millimeter of separation (caused e.g. by veneer or dirt) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Force direction – note that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Material type – ideal substrate is high-permeability steel. Stainless steels may generate lower lifting capacity.
  • Plate texture – smooth surfaces guarantee perfect abutment, which increases field saturation. Rough surfaces reduce efficiency.
  • Temperature influence – hot environment weakens magnetic field. Too high temperature can permanently damage the magnet.

Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under parallel forces the holding force is lower. Additionally, even a small distance between the magnet’s surface and the plate reduces the holding force.

Warnings
Metal Allergy

A percentage of the population suffer from a hypersensitivity to nickel, which is the typical protective layer for NdFeB magnets. Frequent touching may cause skin redness. We suggest use protective gloves.

Threat to electronics

Data protection: Neodymium magnets can damage payment cards and sensitive devices (heart implants, hearing aids, mechanical watches).

Powerful field

Exercise caution. Rare earth magnets attract from a distance and connect with huge force, often faster than you can react.

Medical interference

Individuals with a heart stimulator must maintain an absolute distance from magnets. The magnetism can interfere with the functioning of the life-saving device.

Machining danger

Machining of NdFeB material poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Material brittleness

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

GPS Danger

GPS units and smartphones are extremely sensitive to magnetism. Direct contact with a powerful NdFeB magnet can decalibrate the sensors in your phone.

Heat sensitivity

Watch the temperature. Exposing the magnet to high heat will ruin its magnetic structure and pulling force.

Swallowing risk

NdFeB magnets are not toys. Accidental ingestion of multiple magnets can lead to them attracting across intestines, which poses a critical condition and requires immediate surgery.

Crushing force

Large magnets can break fingers in a fraction of a second. Never put your hand between two attracting surfaces.

Warning! More info about risks in the article: Magnet Safety Guide.