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UMGW 75x33x18 [M10] GW / N38 - magnetic holder internal thread

magnetic holder internal thread

Catalog no 180420

GTIN/EAN: 5906301813798

5.00

Diameter Ø

75 mm [±1 mm]

Height

33 mm [±1 mm]

Height

18 mm [±1 mm]

Weight

475 g

Load capacity

162.00 kg / 1588.68 N

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189.91 ZŁ with VAT / pcs + price for transport

154.40 ZŁ net + 23% VAT / pcs

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Technical parameters of the product - UMGW 75x33x18 [M10] GW / N38 - magnetic holder internal thread

Specification / characteristics - UMGW 75x33x18 [M10] GW / N38 - magnetic holder internal thread

properties
properties values
Cat. no. 180420
GTIN/EAN 5906301813798
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 75 mm [±1 mm]
Height 33 mm [±1 mm]
Height 18 mm [±1 mm]
Weight 475 g
Load capacity ~ ? 162.00 kg / 1588.68 N
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGW 75x33x18 [M10] 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 specification and ecology
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: 180420-2026
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Force (pull)
Magnetic Field
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The steel cup acts as an armature, concentrating the magnetic flux and increasing capacity even several times. The metal cover secures the magnet against mechanical damage, which is common in workshop conditions. The bushing with internal thread allows easy screwing of any element (bolt, hook, handle).
Too long a screw can pass through the bushing and push out or damage the magnet glued into the bottom of the cup. If the screw reaches the bottom of the bushing and is further tightened forcefully, it will destroy the magnet. 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.
This value applies to perfect adherence with the entire magnet surface. Air gap (rust, paint, dirt) also drastically lowers holding power. For side detachment (sliding), the force is only approx. 1/3 of nominal capacity.
Steel cups are usually coated with a layer of nickel (shiny) or zinc (matte/bright), providing basic protection. In rain and frost, the coating may degrade over time if not protected. The neodymium magnet itself inside is also nickel-plated.

Strengths as well as weaknesses of neodymium magnets.

Advantages

Besides their stability, neodymium magnets are valued for these benefits:
  • They do not lose magnetism, even after around 10 years – the decrease in power is only ~1% (based on measurements),
  • They do not lose their magnetic properties even under strong external field,
  • In other words, due to the aesthetic surface of nickel, the element is aesthetically pleasing,
  • Neodymium magnets create maximum magnetic induction on a contact point, which ensures high operational effectiveness,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Possibility of individual shaping as well as adjusting to individual needs,
  • Versatile presence in advanced technology sectors – they are used in data components, electric drive systems, medical devices, as well as multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which makes them useful in compact constructions

Weaknesses

Cons of neodymium magnets and ways of using them
  • Brittleness is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a strong case, which not only protects them against impacts but also raises their 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 advise using waterproof magnets e.g. in rubber, plastic
  • We recommend casing - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complicated forms.
  • Potential hazard to health – tiny shards of magnets pose a threat, if swallowed, which is particularly important in the aspect of protecting the youngest. Furthermore, small elements of these products are able to 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

Lifting parameters

Highest magnetic holding force – what contributes to it?

The force parameter is a measurement result conducted under the following configuration:
  • using a plate made of low-carbon steel, functioning as a magnetic yoke
  • whose thickness reaches at least 10 mm
  • with an polished touching surface
  • with direct contact (no paint)
  • for force applied at a right angle (pull-off, not shear)
  • in temp. approx. 20°C

Practical aspects of lifting capacity – factors

During everyday use, the actual holding force depends on several key aspects, presented from crucial:
  • Clearance – existence of foreign body (rust, tape, air) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Loading method – declared lifting capacity refers to pulling vertically. When slipping, the magnet exhibits significantly lower power (often approx. 20-30% of maximum force).
  • Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Steel type – low-carbon steel attracts best. Alloy admixtures reduce magnetic permeability and holding force.
  • Plate texture – smooth surfaces ensure maximum contact, which improves force. Uneven metal reduce efficiency.
  • Thermal environment – temperature increase causes a temporary drop of induction. Check the maximum operating temperature for a given model.

Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under attempts to slide the magnet the load capacity is reduced by as much as 75%. In addition, even a slight gap between the magnet and the plate decreases the load capacity.

Precautions when working with NdFeB magnets
Maximum temperature

Avoid heat. Neodymium magnets are susceptible to heat. If you need resistance above 80°C, ask us about HT versions (H, SH, UH).

Beware of splinters

Protect your eyes. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. We recommend safety glasses.

Phone sensors

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

Fire warning

Dust generated during cutting of magnets is flammable. Avoid drilling into magnets unless you are an expert.

Magnetic media

Powerful magnetic fields can corrupt files on payment cards, HDDs, and storage devices. Keep a distance of min. 10 cm.

Warning for heart patients

Life threat: Strong magnets can turn off pacemakers and defibrillators. Stay away if you have electronic implants.

Do not give to children

Neodymium magnets are not intended for children. Accidental ingestion of multiple magnets may result in them attracting across intestines, which poses a severe health hazard and requires immediate surgery.

Sensitization to coating

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If skin irritation occurs, cease working with magnets and wear gloves.

Powerful field

Before use, read the rules. Uncontrolled attraction can break the magnet or injure your hand. Be predictive.

Crushing risk

Large magnets can crush fingers in a fraction of a second. Under no circumstances put your hand betwixt two strong magnets.

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