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UMGW 32x18x8 [M6] GW / N38 - magnetic holder internal thread

magnetic holder internal thread

Catalog no 180318

GTIN/EAN: 5906301813743

5.00
Load capacity 34.00 kg / 333.43 N
Diameter Ø
32 mm [±1 mm]
Height
18 mm [±1 mm]
Height
8 mm [±1 mm]
Weight
42 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel
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Technical data - UMGW 32x18x8 [M6] GW / N38 - magnetic holder internal thread

Specification / characteristics - UMGW 32x18x8 [M6] GW / N38 - magnetic holder internal thread

properties
properties values
Cat. no. 180318
GTIN/EAN 5906301813743
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 32 mm [±1 mm]
Height 18 mm [±1 mm]
Height 8 mm [±1 mm]
Weight 42 g
Magnetization Direction ↑ axial
Load capacity ~ ? 34.00 kg / 333.43 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGW 32x18x8 [M6] GW / N38 - magnetic holder internal 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: 180318-2026
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The steel cup acts as an armature, concentrating the magnetic flux and increasing capacity even several times. Thanks to this, the holder is more durable, resistant, and safer to mount. The threaded hole allows creating a functional mounting point in seconds.
Care must be taken not to screw the bolt too deep into the magnet bushing. Neodymium magnets are brittle, and direct pressure from a screw can cause them to crack or detach. You can use a spacer washer or lock nut to limit screwing depth.
These holders are commonly used in industry, advertising, and construction for quick mounting. They serve as a base for hooks, cable holders, organizers, and lighting systems. Ideal for fixing lighting on machine tools and welding tables.
Nominal capacity (for this model approx. 34.00 kg) is measured in ideal conditions: perpendicular detachment from thick steel (min. 10mm). On a thin surface or painted cabinet, the magnet will hold much weaker (even by 50-70%). We always recommend choosing a magnet with power reserve, especially if the surface is not ideal.
Steel cups are usually coated with a layer of nickel (shiny) or zinc (matte/bright), providing basic protection. For outdoor applications, we recommend additional protection with varnish or choosing a rubberized (hermetic) version. The whole is well protected for standard workshop and industrial applications.

Pros as well as cons of Nd2Fe14B magnets.

Pros

Apart from their strong holding force, neodymium magnets have these key benefits:
  • They retain magnetic properties for nearly 10 years – the drop is just ~1% (based on simulations),
  • They feature excellent resistance to magnetism drop as a result of opposing magnetic fields,
  • Thanks to the elegant finish, the layer of Ni-Cu-Ni, gold, or silver gives an professional appearance,
  • Magnets are distinguished by excellent magnetic induction on the outer layer,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Possibility of custom creating as well as optimizing to specific applications,
  • Universal use in advanced technology sectors – they are used in computer drives, drive modules, medical devices, also technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which allows their use in compact constructions

Cons

Disadvantages of neodymium magnets:
  • To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution secures the magnet and simultaneously increases its durability.
  • 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
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation as well as corrosion.
  • We recommend a housing - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complicated shapes.
  • Possible danger related to microscopic parts of magnets can be dangerous, in case of ingestion, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small components of these magnets are able to complicate diagnosis medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Maximum holding power of the magnet – what contributes to it?

The load parameter shown refers to the limit force, measured under laboratory conditions, meaning:
  • with the application of a sheet made of special test steel, ensuring full magnetic saturation
  • whose thickness reaches at least 10 mm
  • characterized by lack of roughness
  • without the slightest insulating layer between the magnet and steel
  • for force acting at a right angle (pull-off, not shear)
  • at ambient temperature room level

What influences lifting capacity in practice

In real-world applications, the actual holding force depends on several key aspects, ranked from the most important:
  • Gap between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Load vector – maximum parameter is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is typically several times smaller (approx. 1/5 of the lifting capacity).
  • Steel thickness – insufficiently thick plate does not close the flux, causing part of the flux to be lost to the other side.
  • Plate material – mild steel gives the best results. Alloy steels decrease magnetic properties and lifting capacity.
  • Plate texture – smooth surfaces guarantee perfect abutment, which improves force. Rough surfaces weaken the grip.
  • Temperature – temperature increase causes a temporary drop of force. It is worth remembering the thermal limit for a given model.

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under a perpendicular pulling force, however under attempts to slide the magnet the load capacity is reduced by as much as 75%. In addition, even a small distance between the magnet’s surface and the plate reduces the holding force.

Precautions when working with NdFeB magnets
Magnetic interference

An intense magnetic field interferes with the operation of compasses in phones and navigation systems. Maintain magnets close to a device to prevent breaking the sensors.

Eye protection

Despite the nickel coating, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may shatter into hazardous fragments.

Product not for children

Absolutely keep magnets out of reach of children. Choking hazard is significant, and the consequences of magnets clamping inside the body are tragic.

Maximum temperature

Regular neodymium magnets (grade N) lose magnetization when the temperature exceeds 80°C. The loss of strength is permanent.

Handling rules

Before use, read the rules. Sudden snapping can break the magnet or hurt your hand. Be predictive.

Sensitization to coating

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

ICD Warning

Warning for patients: Powerful magnets affect electronics. Keep at least 30 cm distance or ask another person to handle the magnets.

Threat to electronics

Do not bring magnets close to a purse, laptop, or screen. The magnetism can destroy these devices and wipe information from cards.

Crushing force

Large magnets can smash fingers instantly. Under no circumstances put your hand between two attracting surfaces.

Fire warning

Powder generated during cutting of magnets is self-igniting. Do not drill into magnets unless you are an expert.

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