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UMGW 48x24x11.5 [M8] GW / N38 - magnetic holder internal thread

magnetic holder internal thread

Catalog no 180418

GTIN/EAN: 5906301813774

5.00

Diameter Ø

48 mm [±1 mm]

Height

24 mm [±1 mm]

Height

11.5 mm [±1 mm]

Weight

140 g

Magnetization Direction

↑ axial

Load capacity

80.00 kg / 784.53 N

Coating

[NiCuNi] Nickel

technical specifications »

59.96 ZŁ with VAT / pcs + price for transport

48.75 ZŁ net + 23% VAT / pcs

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Force and form of neodymium magnets can be calculated on our force calculator.

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Technical details - UMGW 48x24x11.5 [M8] GW / N38 - magnetic holder internal thread

Specification / characteristics - UMGW 48x24x11.5 [M8] GW / N38 - magnetic holder internal thread

properties
properties values
Cat. no. 180418
GTIN/EAN 5906301813774
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
Magnetization Direction ↑ axial
Load capacity ~ ? 80.00 kg / 784.53 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGW 48x24x11.5 [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 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: 180418-2026
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Force (pull)
Field Strength
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The steel housing shields the magnetic field from the sides and top, directing all its power downwards (to the active side). Thanks to this, the holder is more durable, resistant, and safer to mount. 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 allow mounting without drilling in steel substrate, which is crucial in rented spaces. In the workshop, they can serve as mounting points for tools or measuring instruments.
This value applies to perfect adherence with the entire magnet surface. With thin sheets (e.g., car body, fridge casing), the force will be much smaller because steel cannot absorb the entire magnetic field. We always recommend choosing a magnet with power reserve, especially if the surface is not ideal.
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.

Strengths as well as weaknesses of Nd2Fe14B magnets.

Advantages

Besides their immense magnetic power, neodymium magnets offer the following advantages:
  • They have unchanged lifting capacity, and over more than 10 years their performance decreases symbolically – ~1% (in testing),
  • They maintain their magnetic properties even under external field action,
  • Thanks to the elegant finish, the coating of nickel, gold, or silver gives an visually attractive appearance,
  • Magnetic induction on the working layer of the magnet is exceptional,
  • Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
  • Possibility of exact forming and adapting to precise conditions,
  • Significant place in advanced technology sectors – they are commonly used in HDD drives, electric motors, medical equipment, and technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which enables their usage in compact constructions

Disadvantages

Characteristics of disadvantages of neodymium magnets: application proposals
  • At strong impacts they can break, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • Limited possibility of making threads in the magnet and complicated shapes - preferred is a housing - mounting mechanism.
  • Possible danger resulting from small fragments of magnets are risky, when accidentally swallowed, which is particularly important in the context of child health protection. Furthermore, small elements of these magnets can be problematic in diagnostics 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

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

Information about lifting capacity was determined for ideal contact conditions, taking into account:
  • using a plate made of low-carbon steel, serving as a circuit closing element
  • whose transverse dimension equals approx. 10 mm
  • with an ideally smooth touching surface
  • under conditions of ideal adhesion (metal-to-metal)
  • under perpendicular application of breakaway force (90-degree angle)
  • in stable room temperature

Determinants of practical lifting force of a magnet

In real-world applications, the real power is determined by many variables, ranked from the most important:
  • Space between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Angle of force application – highest force is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is typically several times smaller (approx. 1/5 of the lifting capacity).
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
  • Steel grade – the best choice is pure iron steel. Hardened steels may attract less.
  • Surface condition – smooth surfaces guarantee perfect abutment, which increases force. Rough surfaces reduce efficiency.
  • Temperature – heating the magnet causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under shearing force the holding force is lower. Moreover, even a minimal clearance between the magnet and the plate decreases the holding force.

Warnings
Adults only

Strictly store magnets away from children. Risk of swallowing is significant, and the consequences of magnets clamping inside the body are life-threatening.

Allergic reactions

Nickel alert: The nickel-copper-nickel coating contains nickel. If redness happens, immediately stop handling magnets and use protective gear.

Keep away from computers

Intense magnetic fields can erase data on credit cards, HDDs, and storage devices. Stay away of min. 10 cm.

Thermal limits

Regular neodymium magnets (N-type) lose magnetization when the temperature goes above 80°C. The loss of strength is permanent.

Immense force

Handle magnets with awareness. Their powerful strength can shock even experienced users. Be vigilant and respect their force.

GPS Danger

GPS units and smartphones are extremely sensitive to magnetic fields. Close proximity with a powerful NdFeB magnet can permanently damage the sensors in your phone.

Implant safety

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

Fragile material

NdFeB magnets are ceramic materials, which means they are very brittle. Clashing of two magnets leads to them shattering into small pieces.

Physical harm

Pinching hazard: The attraction force is so immense that it can cause blood blisters, pinching, and even bone fractures. Protective gloves are recommended.

Fire warning

Powder created during machining of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.

Attention! Need more info? Read our article: Are neodymium magnets dangerous?