UMC 36x6/4X8 / N38 - cylindrical magnetic holder
cylindrical magnetic holder
Catalog no 320410
GTIN/EAN: 5906301814665
Diameter
36 mm [±1 mm]
internal diameter Ø
6/4 mm [±1 mm]
Height
8 mm [±1 mm]
Weight
45 g
Magnetization Direction
↑ axial
Load capacity
29.00 kg / 284.39 N
Coating
[NiCuNi] Nickel
21.49 ZŁ with VAT / pcs + price for transport
17.47 ZŁ net + 23% VAT / pcs
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Detailed specification - UMC 36x6/4X8 / N38 - cylindrical magnetic holder
Specification / characteristics - UMC 36x6/4X8 / N38 - cylindrical magnetic holder
| properties | values |
|---|---|
| Cat. no. | 320410 |
| GTIN/EAN | 5906301814665 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter | 36 mm [±1 mm] |
| internal diameter Ø | 6/4 mm [±1 mm] |
| Height | 8 mm [±1 mm] |
| Weight | 45 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 29.00 kg / 284.39 N |
| Coating | [NiCuNi] Nickel |
| Manufacturing Tolerance | ±1 mm |
Magnetic properties of material N38
| 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
| 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 |
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other products
![UI 17.5x5 [C310] / N38 - badge holder](https://cdn3.dhit.pl/graphics/products/ui17.5x5-c310-rud.jpg "UI 17.5x5 [C310] / N38 - badge holder")
Advantages as well as disadvantages of Nd2Fe14B magnets.
Advantages
- They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (according to literature),
- They maintain their magnetic properties even under external field action,
- In other words, due to the metallic surface of nickel, the element is aesthetically pleasing,
- They feature high magnetic induction at the operating surface, which affects their effectiveness,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Thanks to the option of flexible shaping and adaptation to unique projects, magnetic components can be manufactured in a broad palette of forms and dimensions, which expands the range of possible applications,
- Versatile presence in electronics industry – they find application in computer drives, motor assemblies, diagnostic systems, also technologically advanced constructions.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which allows their use in miniature devices
Limitations
- At very strong impacts they can crack, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- When exposed to high temperature, neodymium magnets suffer 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
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
- We recommend casing - magnetic holder, due to difficulties in realizing nuts inside the magnet and complicated shapes.
- Potential hazard to health – tiny shards of magnets pose a threat, in case of ingestion, which is particularly important in the context of child safety. It is also worth noting that small components of these devices can complicate diagnosis medical when they are in the body.
- Due to expensive raw materials, their price is higher than average,
Holding force characteristics
Magnetic strength at its maximum – what contributes to it?
- with the use of a yoke made of special test steel, ensuring maximum field concentration
- whose transverse dimension is min. 10 mm
- with an polished contact surface
- without any insulating layer between the magnet and steel
- during detachment in a direction perpendicular to the mounting surface
- at temperature room level
Determinants of lifting force in real conditions
- Air gap (betwixt the magnet and the metal), as even a tiny distance (e.g. 0.5 mm) can cause a drastic drop in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
- Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
- Element thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
- Metal type – not every steel attracts identically. High carbon content weaken the interaction with the magnet.
- Smoothness – full contact is obtained only on polished steel. Rough texture create air cushions, weakening the magnet.
- Thermal environment – heating the magnet results in weakening of induction. It is worth remembering the maximum operating temperature for a given model.
Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under shearing force the load capacity is reduced by as much as fivefold. Additionally, even a minimal clearance between the magnet’s surface and the plate lowers the lifting capacity.
Warnings
Bone fractures
Risk of injury: The pulling power is so immense that it can result in hematomas, crushing, and broken bones. Protective gloves are recommended.
Threat to navigation
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.
Magnetic media
Avoid bringing magnets close to a wallet, laptop, or screen. The magnetic field can irreversibly ruin these devices and wipe information from cards.
Metal Allergy
Some people have a contact allergy to nickel, which is the common plating for neodymium magnets. Prolonged contact can result in an allergic reaction. We suggest wear protective gloves.
Thermal limits
Watch the temperature. Exposing the magnet above 80 degrees Celsius will ruin its magnetic structure and strength.
No play value
Adult use only. Tiny parts can be swallowed, causing severe trauma. Store out of reach of children and animals.
Handling rules
Before starting, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.
Magnet fragility
Protect your eyes. Magnets can fracture upon violent connection, ejecting shards into the air. Wear goggles.
Machining danger
Fire warning: Neodymium dust is explosive. Do not process magnets without safety gear as this risks ignition.
Implant safety
Medical warning: Strong magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.
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