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UMGW 16x13x5 [M4] GW / N38 - magnetic holder internal thread

magnetic holder internal thread

Catalog no 180315

GTIN/EAN: 5906301813712

5.00

Diameter Ø

16 mm [±1 mm]

Height

13 mm [±1 mm]

Height

5 mm [±1 mm]

Weight

6.6 g

Magnetization Direction

↑ axial

Load capacity

5.00 kg / 49.03 N

Coating

[NiCuNi] Nickel

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3.80 ZŁ with VAT / pcs + price for transport

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Technical - UMGW 16x13x5 [M4] GW / N38 - magnetic holder internal thread

Specification / characteristics - UMGW 16x13x5 [M4] GW / N38 - magnetic holder internal thread

properties
properties values
Cat. no. 180315
GTIN/EAN 5906301813712
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 16 mm [±1 mm]
Height 13 mm [±1 mm]
Height 5 mm [±1 mm]
Weight 6.6 g
Magnetization Direction ↑ axial
Load capacity ~ ? 5.00 kg / 49.03 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGW 16x13x5 [M4] 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%
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: 180315-2026
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Pulling force
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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 bushing with internal thread allows easy screwing of any element (bolt, hook, handle).
Care must be taken not to screw the bolt too deep into the magnet bushing. 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.
They are used for fixing sensors, lamps, rating plates, machine guards, and installations. They enable creating demountable connections that can be easily moved. In the workshop, they can serve as mounting points for tools or measuring instruments.
The stated force is the maximum laboratory value obtained on a clean, smooth sheet. Air gap (rust, paint, dirt) also drastically lowers holding power. 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. For outdoor applications, we recommend additional protection with varnish or choosing a rubberized (hermetic) version. The neodymium magnet itself inside is also nickel-plated.

Advantages and disadvantages of neodymium magnets.

Benefits

Besides their durability, neodymium magnets are valued for these benefits:
  • They do not lose magnetism, even during approximately ten years – the reduction in lifting capacity is only ~1% (according to tests),
  • Neodymium magnets prove to be extremely resistant to demagnetization caused by external magnetic fields,
  • By covering with a smooth coating of silver, the element presents an professional look,
  • Magnets possess very high magnetic induction on the outer side,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the shape) even at a temperature of 230°C or more...
  • Due to the potential of accurate molding and adaptation to specialized needs, NdFeB magnets can be produced in a broad palette of geometric configurations, which amplifies use scope,
  • Universal use in high-tech industry – they find application in HDD drives, electric motors, precision medical tools, also technologically advanced constructions.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Weaknesses

Disadvantages of neodymium magnets:
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
  • Limited possibility of producing nuts in the magnet and complex forms - recommended is casing - magnetic holder.
  • Potential hazard to health – tiny shards of magnets are risky, if swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, tiny parts of these devices can disrupt the diagnostic process medical after entering the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Maximum magnetic pulling force – what contributes to it?

The load parameter shown represents the limit force, obtained under laboratory conditions, namely:
  • using a sheet made of mild steel, functioning as a magnetic yoke
  • with a cross-section of at least 10 mm
  • with an ideally smooth touching surface
  • with total lack of distance (without impurities)
  • under vertical application of breakaway force (90-degree angle)
  • at conditions approx. 20°C

Determinants of lifting force in real conditions

Bear in mind that the working load may be lower influenced by elements below, in order of importance:
  • Clearance – existence of foreign body (paint, tape, gap) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Force direction – remember that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Steel thickness – too thin sheet does not accept the full field, causing part of the flux to be escaped into the air.
  • Metal type – different alloys attracts identically. High carbon content weaken the attraction effect.
  • Plate texture – smooth surfaces guarantee perfect abutment, which increases force. Uneven metal weaken the grip.
  • Temperature influence – high temperature reduces magnetic field. Too high temperature can permanently demagnetize the magnet.

Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under attempts to slide the magnet the holding force is lower. In addition, even a slight gap between the magnet’s surface and the plate decreases the lifting capacity.

Safety rules for work with NdFeB magnets
Heat warning

Standard neodymium magnets (N-type) lose power when the temperature surpasses 80°C. Damage is permanent.

Safe operation

Be careful. Rare earth magnets attract from a long distance and connect with massive power, often quicker than you can move away.

Finger safety

Risk of injury: The attraction force is so immense that it can cause hematomas, pinching, and even bone fractures. Protective gloves are recommended.

Allergy Warning

Allergy Notice: The Ni-Cu-Ni coating contains nickel. If skin irritation appears, immediately stop working with magnets and wear gloves.

Threat to electronics

Powerful magnetic fields can destroy records on credit cards, HDDs, and other magnetic media. Maintain a gap of min. 10 cm.

Do not give to children

Always store magnets away from children. Choking hazard is high, and the effects of magnets connecting inside the body are very dangerous.

Beware of splinters

Despite metallic appearance, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.

GPS and phone interference

Navigation devices and mobile phones are highly susceptible to magnetic fields. Close proximity with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

Combustion hazard

Fire warning: Rare earth powder is explosive. Do not process magnets in home conditions as this risks ignition.

Life threat

Individuals with a heart stimulator have to keep an absolute distance from magnets. The magnetic field can interfere with the operation of the life-saving device.

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