← previous
next →
Product available Ships today (order by 14:00)

UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread

magnetic holder internal thread

Catalog no 180319

GTIN/EAN: 5906301813750

5.00
Load capacity 40.00 kg / 392.27 N
Diameter Ø
36 mm [±1 mm]
Height
18 mm [±1 mm]
Height
8 mm [±1 mm]
Weight
52 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel
product parameters »

23.99 zł with VAT / pcs + price for transport

19.50 zł net + 23% VAT / pcs

bulk discounts:

Need more?
price from 1 pcs
19.50 ZŁ
23.99 ZŁ
price from 20 pcs
18.33 ZŁ
22.55 ZŁ
price from 80 pcs
17.16 ZŁ
21.11 ZŁ
Carbon Footprint – environmental impact GPSR Regulation – product safety
Looking for a better price?

Contact us by phone +48 22 499 98 98 alternatively send us a note through form the contact form page.
Strength and shape of a neodymium magnet can be calculated on our online calculation tool.

Orders submitted before 14:00 will be dispatched today!

Product card - UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread

Specification / characteristics - UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread

properties
properties values
Cat. no. 180319
GTIN/EAN 5906301813750
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 36 mm [±1 mm]
Height 18 mm [±1 mm]
Height 8 mm [±1 mm]
Weight 52 g
Magnetization Direction ↑ axial
Load capacity ~ ? 40.00 kg / 392.27 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGW 36x18x8 [M8] 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

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: 180319-2026
Measurement Calculator

Magnet pull force

Magnetic Induction

Input a figure in just one slot to receive results for the other units immediately.

View more offers

ZK XLINK 1026 elementów - construction toy
Product available Ships today (order by 14:00)

ZK XLINK 1026 elementów - construction toy

79.90 zł brutto / pcs
MW 33x30 / N38 - cylindrical magnet
Product available Ships today (order by 14:00)

MW 33x30 / N38 - cylindrical magnet

52.89 zł brutto / pcs
UMGGW 22x6 [M4] GW / N38 - magnetic holder rubber internal thread
Product available Ships today (order by 14:00)

UMGGW 22x6 [M4] GW / N38 - magnetic holder rubber internal thread

7.38 zł brutto / pcs
MW 3x6 / N38 - cylindrical magnet
Product available Ships today (order by 14:00)

MW 3x6 / N38 - cylindrical magnet

0.295 zł brutto / pcs
The steel cup acts as an armature, concentrating the magnetic flux and increasing capacity even several times. Moreover, the metal housing protects the brittle neodymium magnet from cracking upon impact. The threaded hole allows creating a functional mounting point in seconds.
The most important rule is choosing the appropriate length of the screw being screwed in. If the screw reaches the bottom of the bushing and is further tightened forcefully, it will destroy the magnet. It is worth securing the thread with thread glue if the connection is to be durable and resistant to vibrations.
These holders are commonly used in industry, advertising, and construction for quick mounting. They enable creating demountable connections that can be easily moved. Ideal for fixing lighting on machine tools and welding tables.
Nominal capacity (for this model approx. 40.00 kg) is measured in ideal conditions: perpendicular detachment from thick steel (min. 10mm). With thin sheets (e.g., car body, fridge casing), the force will be much smaller because steel cannot absorb the entire magnetic field. For side detachment (sliding), the force is only approx. 1/3 of nominal capacity.
The housing has anti-corrosion protection in the form of galvanic zinc or nickel plating. In rain and frost, the coating may degrade over time if not protected. The neodymium magnet itself inside is also nickel-plated.

Advantages as well as disadvantages of neodymium magnets.

Strengths

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • Their magnetic field is maintained, and after around ten years it decreases only by ~1% (according to research),
  • Neodymium magnets are characterized by highly resistant to loss of magnetic properties caused by external field sources,
  • Thanks to the reflective finish, the coating of nickel, gold-plated, or silver-plated gives an clean appearance,
  • Neodymium magnets ensure maximum magnetic induction on a contact point, which ensures high operational effectiveness,
  • 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 exact modeling as well as adapting to complex requirements,
  • Significant place in innovative solutions – they are commonly used in mass storage devices, brushless drives, diagnostic systems, also modern systems.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Cons of neodymium magnets: application proposals
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a steel housing, which not only secures them against impacts but also raises their durability
  • Neodymium magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • 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 secure oxidation and corrosion.
  • Due to limitations in producing threads and complicated shapes in magnets, we propose using cover - magnetic mechanism.
  • Potential hazard resulting from small fragments of magnets pose a threat, if swallowed, which gains importance in the context of child health protection. Additionally, small components of these magnets can be problematic in diagnostics medical in case of swallowing.
  • With budget limitations the cost of neodymium magnets is economically unviable,

Holding force characteristics

Optimal lifting capacity of a neodymium magnet – what it depends on?

The load parameter shown represents the limit force, obtained under ideal test conditions, specifically:
  • on a base made of structural steel, optimally conducting the magnetic field
  • whose transverse dimension is min. 10 mm
  • with an ideally smooth contact surface
  • without the slightest insulating layer between the magnet and steel
  • for force applied at a right angle (pull-off, not shear)
  • at ambient temperature approx. 20 degrees Celsius

Lifting capacity in real conditions – factors

Effective lifting capacity is influenced by specific conditions, such as (from most important):
  • Distance (betwixt the magnet and the plate), because even a microscopic distance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to varnish, corrosion or debris).
  • Pull-off angle – note that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the maximum value.
  • Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
  • Material composition – different alloys attracts identically. Alloy additives worsen the attraction effect.
  • Surface quality – the smoother and more polished the surface, the larger the contact zone and higher the lifting capacity. Roughness creates an air distance.
  • Thermal conditions – NdFeB sinters have a sensitivity to temperature. When it is hot they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under shearing force the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate decreases the holding force.

Precautions when working with neodymium magnets
Mechanical processing

Fire warning: Rare earth powder is explosive. Avoid machining magnets without safety gear as this risks ignition.

Adults only

Neodymium magnets are not toys. Swallowing multiple magnets may result in them pinching intestinal walls, which constitutes a critical condition and necessitates urgent medical intervention.

Metal Allergy

Allergy Notice: The Ni-Cu-Ni coating contains nickel. If redness happens, immediately stop handling magnets and use protective gear.

Operating temperature

Monitor thermal conditions. Exposing the magnet to high heat will destroy its magnetic structure and pulling force.

Shattering risk

Protect your eyes. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. Wear goggles.

Magnetic interference

Be aware: neodymium magnets generate a field that disrupts sensitive sensors. Keep a separation from your phone, tablet, and navigation systems.

Do not underestimate power

Before starting, read the rules. Sudden snapping can destroy the magnet or hurt your hand. Think ahead.

Keep away from computers

Very strong magnetic fields can erase data on credit cards, hard drives, and other magnetic media. Maintain a gap of min. 10 cm.

Pacemakers

Life threat: Strong magnets can turn off heart devices and defibrillators. Stay away if you have medical devices.

Crushing risk

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

Important! Want to know more? Read our article: Are neodymium magnets dangerous?