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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
Load capacity 5.00 kg / 49.03 N
Diameter Ø
16 mm [±1 mm]
Height
13 mm [±1 mm]
Height
5 mm [±1 mm]
Weight
6.6 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel
product parameters »

3.80 zł with VAT / pcs + price for transport

3.09 zł net + 23% VAT / pcs

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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

Chemical composition

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: 180315-2026
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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 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. 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. Ideal for fixing lighting on machine tools and welding tables.
The stated force is the maximum laboratory value obtained on a clean, smooth sheet. 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. However, these are not fully stainless products and may corrode with constant contact with water. The neodymium magnet itself inside is also nickel-plated.

Strengths as well as weaknesses of rare earth magnets.

Pros

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (according to literature),
  • Magnets perfectly defend themselves against demagnetization caused by ambient magnetic noise,
  • Thanks to the metallic finish, the coating of Ni-Cu-Ni, gold, or silver-plated gives an elegant appearance,
  • The surface of neodymium magnets generates a strong magnetic field – this is a distinguishing feature,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Thanks to the potential of precise molding and customization to custom solutions, neodymium magnets can be manufactured in a broad palette of shapes and sizes, which makes them more universal,
  • Wide application in future technologies – they are used in magnetic memories, motor assemblies, medical devices, and other advanced devices.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Disadvantages

Problematic aspects of neodymium magnets and proposals for their use:
  • 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 increases their durability
  • When exposed to high temperature, neodymium magnets experience a drop in strength. 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
  • They rust in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in creating nuts and complicated forms in magnets, we recommend using cover - magnetic mount.
  • Potential hazard to health – tiny shards of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these devices are able to disrupt the diagnostic process medical when they are in the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Breakaway strength of the magnet in ideal conditions – what affects it?

The force parameter is a result of laboratory testing performed under specific, ideal conditions:
  • on a base made of mild steel, optimally conducting the magnetic flux
  • whose thickness equals approx. 10 mm
  • characterized by even structure
  • under conditions of ideal adhesion (metal-to-metal)
  • during pulling in a direction vertical to the plane
  • at conditions approx. 20°C

Practical aspects of lifting capacity – factors

In practice, the actual holding force depends on a number of factors, ranked from crucial:
  • Gap between surfaces – every millimeter of distance (caused e.g. by veneer or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Direction of force – maximum parameter is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the surface is usually many times smaller (approx. 1/5 of the lifting capacity).
  • Plate thickness – insufficiently thick plate does not close the flux, causing part of the power to be escaped into the air.
  • Material composition – different alloys reacts the same. High carbon content worsen the interaction with the magnet.
  • Surface structure – the more even the surface, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
  • Heat – NdFeB sinters have a sensitivity to temperature. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).

Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under shearing force the holding force is lower. In addition, even a minimal clearance between the magnet’s surface and the plate reduces the load capacity.

Safety rules for work with neodymium magnets
Keep away from electronics

Note: neodymium magnets generate a field that interferes with sensitive sensors. Keep a safe distance from your mobile, device, and navigation systems.

Medical implants

Life threat: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.

Magnet fragility

Despite metallic appearance, the material is delicate and not impact-resistant. Do not hit, as the magnet may crumble into hazardous fragments.

Do not give to children

Always keep magnets away from children. Risk of swallowing is high, and the consequences of magnets clamping inside the body are tragic.

Permanent damage

Regular neodymium magnets (N-type) undergo demagnetization when the temperature surpasses 80°C. Damage is permanent.

Cards and drives

Avoid bringing magnets close to a purse, computer, or screen. The magnetism can irreversibly ruin these devices and wipe information from cards.

Conscious usage

Use magnets with awareness. Their powerful strength can surprise even professionals. Be vigilant and respect their power.

Combustion hazard

Fire warning: Rare earth powder is explosive. Avoid machining magnets without safety gear as this may cause fire.

Crushing risk

Big blocks can smash fingers instantly. Under no circumstances place your hand betwixt two attracting surfaces.

Nickel allergy

Allergy Notice: The nickel-copper-nickel coating contains nickel. If an allergic reaction occurs, cease handling magnets and use protective gear.

Attention! Need more info? Check our post: Are neodymium magnets dangerous?