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UMC 16x5/2x5 / N38 - cylindrical magnetic holder

cylindrical magnetic holder

Catalog no 320406

GTIN/EAN: 5906301814627

5.00

Diameter

16 mm [±1 mm]

internal diameter Ø

5/2 mm [±1 mm]

Height

5 mm [±1 mm]

Weight

5.5 g

Load capacity

4.00 kg / 39.23 N

Coating

[NiCuNi] Nickel

product parameters »

3.33 ZŁ with VAT / pcs + price for transport

2.71 ZŁ net + 23% VAT / pcs

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Parameters along with appearance of a neodymium magnet can be reviewed on our force calculator.

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Technical - UMC 16x5/2x5 / N38 - cylindrical magnetic holder

Specification / characteristics - UMC 16x5/2x5 / N38 - cylindrical magnetic holder

properties
properties values
Cat. no. 320406
GTIN/EAN 5906301814627
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 16 mm [±1 mm]
internal diameter Ø 5/2 mm [±1 mm]
Height 5 mm [±1 mm]
Weight 5.5 g
Load capacity ~ ? 4.00 kg / 39.23 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMC 16x5/2x5 / N38 - cylindrical 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: 320406-2026
Measurement Calculator
Force (pull)
Field Strength
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These are magnets in the shape of a rod in a brass or steel sleeve, ideal for embedding in deep sockets. They are used in positioning elements, injection molds, dies, and automation.
Mounting is done by screwing with a bolt from the back of the device or machine. It is a precise, durable solution enabling depth adjustment.
The construction causes the magnetic flux to short-circuit inside, making the sides practically non-magnetic. It increases attraction force in the magnet axis and facilitates assembly in ferromagnetic blocks.
The steel housing provides excellent mechanical protection for the brittle magnet against impacts. Suitable for working in difficult workshop and industrial conditions.
Dimensions may vary slightly, so they are not always H7 fitted elements without machining. If high precision is required, measure the specific batch with a caliper before machining sockets.

Strengths as well as weaknesses of Nd2Fe14B magnets.

Strengths

Besides their immense field intensity, neodymium magnets offer the following advantages:
  • They virtually do not lose power, because even after ten years the performance loss is only ~1% (in laboratory conditions),
  • They feature excellent resistance to magnetism drop as a result of external magnetic sources,
  • The use of an refined layer of noble metals (nickel, gold, silver) causes the element to present itself better,
  • Neodymium magnets generate maximum magnetic induction on a contact point, which ensures high operational effectiveness,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Thanks to freedom in forming and the capacity to modify to individual projects,
  • Fundamental importance in high-tech industry – they are commonly used in data components, electric motors, diagnostic systems, as well as industrial machines.
  • Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Disadvantages

What to avoid - cons of neodymium magnets: weaknesses and usage proposals
  • At strong impacts they can crack, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
  • Due to limitations in producing threads and complex forms in magnets, we recommend using casing - magnetic mechanism.
  • Possible danger resulting from small fragments of magnets can be dangerous, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Additionally, small elements of these devices can complicate diagnosis medical in case of swallowing.
  • With budget limitations the cost of neodymium magnets is economically unviable,

Holding force characteristics

Best holding force of the magnet in ideal parameters – what it depends on?

Breakaway force was defined for optimal configuration, assuming:
  • with the use of a yoke made of special test steel, guaranteeing maximum field concentration
  • possessing a thickness of at least 10 mm to ensure full flux closure
  • with an ground touching surface
  • with total lack of distance (no coatings)
  • for force applied at a right angle (pull-off, not shear)
  • at temperature room level

What influences lifting capacity in practice

Holding efficiency is affected by working environment parameters, mainly (from priority):
  • Distance – existence of any layer (rust, dirt, gap) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Load vector – highest force is reached only during pulling at a 90° angle. The force required to slide of the magnet along the plate is standardly several times smaller (approx. 1/5 of the lifting capacity).
  • Plate thickness – insufficiently thick plate does not close the flux, causing part of the flux to be escaped to the other side.
  • Metal type – not every steel reacts the same. Alloy additives weaken the interaction with the magnet.
  • Plate texture – smooth surfaces ensure maximum contact, which increases force. Rough surfaces weaken the grip.
  • Temperature influence – hot environment weakens pulling force. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was performed on a smooth plate of optimal thickness, under perpendicular forces, in contrast under attempts to slide the magnet the load capacity is reduced by as much as 75%. Moreover, even a slight gap between the magnet and the plate decreases the lifting capacity.

Precautions when working with neodymium magnets
Keep away from electronics

GPS units and mobile phones are highly susceptible to magnetic fields. Direct contact with a strong magnet can ruin the sensors in your phone.

Immense force

Handle magnets consciously. Their immense force can surprise even professionals. Plan your moves and do not underestimate their power.

Cards and drives

Avoid bringing magnets near a wallet, computer, or TV. The magnetic field can permanently damage these devices and wipe information from cards.

Allergic reactions

Certain individuals experience a contact allergy to Ni, which is the common plating for NdFeB magnets. Prolonged contact may cause an allergic reaction. It is best to wear protective gloves.

ICD Warning

People with a ICD have to keep an large gap from magnets. The magnetic field can disrupt the functioning of the life-saving device.

Heat warning

Avoid heat. NdFeB magnets are sensitive to heat. If you require resistance above 80°C, inquire about HT versions (H, SH, UH).

Dust explosion hazard

Dust produced during machining of magnets is combustible. Avoid drilling into magnets unless you are an expert.

Swallowing risk

Only for adults. Small elements pose a choking risk, leading to severe trauma. Store out of reach of kids and pets.

Physical harm

Watch your fingers. Two large magnets will join immediately with a force of several hundred kilograms, destroying anything in their path. Exercise extreme caution!

Material brittleness

Neodymium magnets are sintered ceramics, meaning they are prone to chipping. Clashing of two magnets will cause them shattering into shards.

Security! Looking for details? Read our article: Why are neodymium magnets dangerous?