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

conical magnetic holder

Catalog no 220326

GTIN/EAN: 5906301814160

5.00

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

product parameters »

4.48 ZŁ with VAT / pcs + price for transport

3.64 ZŁ net + 23% VAT / pcs

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Technical - 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
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%
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: 220326-2026
Measurement Calculator
Magnet pull force
Magnetic Induction
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This type of holder is perfect for mounting magnetic latches in cabinets, doors, and flaps. Thanks to the hole with a chamfer (conical), the screw head hides in the magnet, ensuring a flat contact surface. 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. It is best to use a screw with a countersunk head perfectly matched to the hole. The screw head should not protrude above the magnet surface, but it cannot burst it either.
For two magnets screwed with cones facing each other (faces) to attract, they must have different polarity. If you need a pair, ask about availability of complementary sets or check the description. Mounting a magnet to a plate eliminates the problem of matching poles and is easier.
The declared capacity (e.g., 5.00 kg) refers to the perpendicular force needed to detach the magnet from thick steel. If the magnet hangs vertically, gravity causes it to slide with much less load. Paint or veneer on metal also reduces effective attraction force.
Thanks to the metal cup, the magnetic field is concentrated on the active side, which significantly increases force. The housing absorbs impacts, preventing the magnet from crumbling and cracking. The countersunk holder is a professional mounting solution with increased durability.

Strengths and weaknesses of neodymium magnets.

Strengths

Apart from their consistent magnetism, neodymium magnets have these key benefits:
  • They virtually do not lose power, because even after 10 years the performance loss is only ~1% (in laboratory conditions),
  • They feature excellent resistance to weakening of magnetic properties due to opposing magnetic fields,
  • Thanks to the reflective finish, the layer of Ni-Cu-Ni, gold, or silver-plated gives an modern appearance,
  • Neodymium magnets ensure maximum magnetic induction on a small surface, which allows for strong attraction,
  • Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
  • Possibility of individual shaping as well as adapting to precise requirements,
  • Universal use in innovative solutions – they are utilized in mass storage devices, electromotive mechanisms, medical devices, and multitasking production systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Cons

What to avoid - cons of neodymium magnets: application proposals
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a special holder, which not only protects them against impacts but also increases their durability
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop 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
  • Magnets exposed to a humid environment can rust. Therefore when using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • Due to limitations in creating nuts and complicated forms in magnets, we recommend using casing - magnetic mount.
  • Potential hazard related to microscopic parts of magnets are risky, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Furthermore, tiny parts of these devices can complicate diagnosis 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 it depends on?

The load parameter shown refers to the peak performance, obtained under optimal environment, specifically:
  • with the application of a yoke made of special test steel, ensuring full magnetic saturation
  • whose thickness equals approx. 10 mm
  • with an ground contact surface
  • with total lack of distance (no impurities)
  • for force acting at a right angle (in the magnet axis)
  • in temp. approx. 20°C

Lifting capacity in real conditions – factors

Holding efficiency is affected by working environment parameters, including (from priority):
  • Gap between magnet and steel – every millimeter of separation (caused e.g. by veneer or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
  • Force direction – catalog parameter refers to detachment vertically. When slipping, the magnet exhibits significantly lower power (typically approx. 20-30% of maximum force).
  • Base massiveness – too thin sheet does not accept the full field, causing part of the flux to be lost to the other side.
  • Metal type – not every steel attracts identically. High carbon content worsen the interaction with the magnet.
  • Plate texture – smooth surfaces ensure maximum contact, which increases field saturation. Rough surfaces weaken the grip.
  • Thermal factor – hot environment weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was conducted on a smooth plate of suitable thickness, under perpendicular forces, in contrast under parallel forces the load capacity is reduced by as much as fivefold. Moreover, even a minimal clearance between the magnet and the plate decreases the load capacity.

Safe handling of NdFeB magnets
Magnetic interference

An intense magnetic field disrupts the operation of compasses in phones and navigation systems. Maintain magnets near a smartphone to avoid breaking the sensors.

Operating temperature

Regular neodymium magnets (grade N) lose power when the temperature exceeds 80°C. This process is irreversible.

Protect data

Very strong magnetic fields can corrupt files on payment cards, hard drives, and other magnetic media. Stay away of at least 10 cm.

Pinching danger

Big blocks can smash fingers in a fraction of a second. Under no circumstances put your hand betwixt two attracting surfaces.

Allergic reactions

Some people have a contact allergy to Ni, which is the typical protective layer for NdFeB magnets. Extended handling might lead to skin redness. We recommend wear protective gloves.

Protective goggles

Beware of splinters. Magnets can fracture upon violent connection, ejecting shards into the air. We recommend safety glasses.

Adults only

Adult use only. Small elements pose a choking risk, leading to intestinal necrosis. Keep out of reach of children and animals.

Safe operation

Before use, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.

Dust is flammable

Dust created during machining of magnets is combustible. Do not drill into magnets unless you are an expert.

Pacemakers

Warning for patients: Strong magnetic fields affect electronics. Keep minimum 30 cm distance or request help to work with the magnets.

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