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UMS 16x6.5x3.5x5 / N38 - conical magnetic holder

conical magnetic holder

Catalog no 220326

GTIN/EAN: 5906301814160

5.00
Load capacity 5.00 kg / 49.03 N
Diameter Ø
16 mm [±1 mm]
cone dimension Ø
6.5x3.5 mm [±1 mm]
Height
5 mm [±1 mm]
Weight
5.5 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel
product parameters »

4.48 zł with VAT / pcs + price for transport

3.64 zł net + 23% VAT / pcs

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Specifications and appearance of neodymium magnets can be checked using our modular calculator.

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Technical of the product - UMS 16x6.5x3.5x5 / N38 - conical magnetic holder

Specification / characteristics - UMS 16x6.5x3.5x5 / N38 - conical magnetic holder

properties
properties values
Cat. no. 220326
GTIN/EAN 5906301814160
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]
cone dimension Ø 6.5x3.5 mm [±1 mm]
Height 5 mm [±1 mm]
Weight 5.5 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 UMS 16x6.5x3.5x5 / N38 - conical magnetic holder
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: 220326-2026
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It is the most popular solution for creating aesthetic, invisible door locks. The ability to flush the screw with the magnet surface allows for perfect closing without gaps. Model UMS 16x6.5x3.5x5 / N38 will successfully hold inspection doors, tools in the workshop, or shop display elements.
Neodymium magnets are sintered ceramics, which means they are very hard but also brittle. Avoid forceful tightening when you feel resistance. The screw head should not protrude above the magnet surface, but it cannot burst it either.
To create a pair (magnet-magnet), you need one holder with an N pole on the chamfer and another with an S pole. In our offer, we try to mark or pair holders if explicitly stated in the description. A set of magnet + plate is cheaper and holds just as strongly.
This force is measured in ideal laboratory conditions when pulling at a 90-degree angle. In practice, when mounted on a wall (shear force), the magnet will hold significantly less (approx. 20-30% of nominal). When selecting a magnet for a cabinet, remember that the air gap (e.g., bumpers, seals) weakens the grip.
The steel housing (cup/pot) acts as a magnetic shield, directing all power to the front of the holder. Furthermore, steel protects the brittle neodymium from mechanical damage when closing cabinets (impacts). A bare ring has a dispersed field on both sides but is weaker in point holding.

Pros and cons of neodymium magnets.

Benefits

Apart from their consistent power, neodymium magnets have these key benefits:
  • They have constant strength, and over more than ten years their attraction force decreases symbolically – ~1% (in testing),
  • Magnets perfectly defend themselves against loss of magnetization caused by ambient magnetic noise,
  • In other words, due to the metallic finish of gold, the element becomes visually attractive,
  • The surface of neodymium magnets generates a maximum magnetic field – this is one of their assets,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Thanks to versatility in constructing and the ability to customize to complex applications,
  • Wide application in modern technologies – they are utilized in mass storage devices, electric drive systems, medical devices, and modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which enables their usage in miniature devices

Limitations

Disadvantages of NdFeB magnets:
  • At strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • NdFeB magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
  • We suggest casing - magnetic mount, due to difficulties in creating nuts inside the magnet and complicated shapes.
  • Health risk related to microscopic parts of magnets are risky, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, tiny parts of these devices are able to complicate diagnosis medical in case of swallowing.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities

Holding force characteristics

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

The declared magnet strength refers to the maximum value, obtained under ideal test conditions, namely:
  • with the contact of a yoke made of special test steel, guaranteeing full magnetic saturation
  • possessing a massiveness of min. 10 mm to avoid saturation
  • with a surface free of scratches
  • without any air gap between the magnet and steel
  • during pulling in a direction perpendicular to the mounting surface
  • at ambient temperature approx. 20 degrees Celsius

Lifting capacity in real conditions – factors

Real force impacted by specific conditions, such as (from most important):
  • Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Base massiveness – too thin plate causes magnetic saturation, causing part of the flux to be wasted into the air.
  • Metal type – not every steel attracts identically. High carbon content worsen the attraction effect.
  • Base smoothness – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
  • Thermal factor – high temperature weakens magnetic field. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was conducted on a smooth plate of suitable thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate lowers the lifting capacity.

H&S for magnets
Protect data

Avoid bringing magnets close to a purse, computer, or TV. The magnetism can irreversibly ruin these devices and erase data from cards.

Do not give to children

Product intended for adults. Tiny parts pose a choking risk, causing severe trauma. Store out of reach of kids and pets.

Keep away from electronics

A powerful magnetic field disrupts the functioning of compasses in phones and navigation systems. Maintain magnets close to a smartphone to prevent breaking the sensors.

Demagnetization risk

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

Risk of cracking

Neodymium magnets are ceramic materials, meaning they are very brittle. Impact of two magnets will cause them breaking into small pieces.

Caution required

Handle magnets consciously. Their powerful strength can surprise even professionals. Plan your moves and respect their power.

Sensitization to coating

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction occurs, cease handling magnets and use protective gear.

Bone fractures

Watch your fingers. Two large magnets will snap together immediately with a force of massive weight, crushing anything in their path. Be careful!

Danger to pacemakers

Health Alert: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have electronic implants.

Mechanical processing

Powder generated during grinding of magnets is combustible. Avoid drilling into magnets unless you are an expert.

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