UMC 25x6/4x8 / N38 - cylindrical magnetic holder
cylindrical magnetic holder
Catalog no 320408
GTIN/EAN: 5906301814641
Diameter
25 mm [±1 mm]
internal diameter Ø
6/4 mm [±1 mm]
Height
8 mm [±1 mm]
Weight
21 g
Load capacity
14.00 kg / 137.29 N
Coating
[NiCuNi] Nickel
11.70 ZŁ with VAT / pcs + price for transport
9.51 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Give us a call
+48 888 99 98 98
if you prefer drop us a message via
request form
the contact section.
Strength and structure of neodymium magnets can be calculated with our
magnetic mass calculator.
Same-day processing for orders placed before 14:00.
Detailed specification - UMC 25x6/4x8 / N38 - cylindrical magnetic holder
Specification / characteristics - UMC 25x6/4x8 / N38 - cylindrical magnetic holder
| properties | values |
|---|---|
| Cat. no. | 320408 |
| GTIN/EAN | 5906301814641 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter | 25 mm [±1 mm] |
| internal diameter Ø | 6/4 mm [±1 mm] |
| Height | 8 mm [±1 mm] |
| Weight | 21 g |
| Load capacity ~ ? | 14.00 kg / 137.29 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 |
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
See more proposals
![SM 25x325 [2xM8] / N42 - magnetic separator](https://cdn3.dhit.pl/graphics/products/sm-25x325-2xm8-man.jpg "SM 25x325 [2xM8] / N42 - magnetic separator")
![SM 25x250 [2xM8] / N42 - magnetic separator](https://cdn3.dhit.pl/graphics/products/sm-25x250-2xm8-ker.jpg "SM 25x250 [2xM8] / N42 - magnetic separator")
Pros and cons of neodymium magnets.
Benefits
- They do not lose strength, even over nearly 10 years – the reduction in power is only ~1% (according to tests),
- Magnets very well protect themselves against loss of magnetization caused by external fields,
- A magnet with a shiny gold surface is more attractive,
- Magnetic induction on the working part of the magnet remains exceptional,
- Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
- Considering the ability of precise molding and adaptation to custom needs, neodymium magnets can be created in a variety of shapes and sizes, which makes them more universal,
- Wide application in electronics industry – they are used in data components, electric motors, diagnostic systems, also modern systems.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Disadvantages
- At strong impacts they can crack, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- Neodymium magnets lose strength 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 extremely resistant to heat
- Magnets exposed to a humid environment can rust. Therefore during using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Limited ability of creating threads in the magnet and complicated forms - preferred is cover - magnetic holder.
- Possible danger related to microscopic parts of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. It is also worth noting that small elements of these products can complicate diagnosis medical in case of swallowing.
- With large orders the cost of neodymium magnets is a challenge,
Lifting parameters
Maximum holding power of the magnet – what contributes to it?
- using a plate made of high-permeability steel, acting as a circuit closing element
- whose transverse dimension is min. 10 mm
- with a surface perfectly flat
- with zero gap (no coatings)
- during pulling in a direction vertical to the plane
- at room temperature
Lifting capacity in real conditions – factors
- Gap (betwixt the magnet and the plate), because even a microscopic distance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to paint, corrosion or debris).
- Loading method – catalog parameter refers to detachment vertically. When attempting to slide, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
- Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
- Chemical composition of the base – low-carbon steel gives the best results. Alloy steels decrease magnetic permeability and holding force.
- Plate texture – ground elements ensure maximum contact, which improves force. Rough surfaces weaken the grip.
- Thermal factor – high temperature reduces pulling force. Exceeding the limit temperature can permanently damage the magnet.
Lifting capacity was measured using a polished steel plate of optimal thickness (min. 20 mm), under vertically applied force, in contrast under parallel forces the load capacity is reduced by as much as fivefold. Moreover, even a slight gap between the magnet and the plate lowers the holding force.
Safety rules for work with NdFeB magnets
Medical interference
Warning for patients: Strong magnetic fields disrupt electronics. Keep at least 30 cm distance or ask another person to work with the magnets.
Hand protection
Large magnets can break fingers in a fraction of a second. Do not put your hand between two strong magnets.
Heat sensitivity
Do not overheat. Neodymium magnets are sensitive to temperature. If you require resistance above 80°C, ask us about HT versions (H, SH, UH).
Precision electronics
Navigation devices and mobile phones are highly sensitive to magnetic fields. Direct contact with a powerful NdFeB magnet can ruin the internal compass in your phone.
Handling guide
Exercise caution. Neodymium magnets attract from a long distance and connect with huge force, often quicker than you can move away.
Adults only
Only for adults. Tiny parts pose a choking risk, leading to intestinal necrosis. Store away from children and animals.
Machining danger
Combustion risk: Rare earth powder is highly flammable. Do not process magnets without safety gear as this may cause fire.
Sensitization to coating
A percentage of the population suffer from a hypersensitivity to nickel, which is the standard coating for NdFeB magnets. Prolonged contact may cause dermatitis. We suggest wear protective gloves.
Electronic hazard
Device Safety: Neodymium magnets can damage data carriers and delicate electronics (pacemakers, medical aids, timepieces).
Risk of cracking
Neodymium magnets are ceramic materials, which means they are very brittle. Clashing of two magnets will cause them shattering into small pieces.
Tabela kosztu i czasu dostawy
Płatność przed wysyłką:
GLS kurier
Przesyłka będzie u Ciebie za 2-3 dni
14.99 ZŁ
InPost Paczkomaty 24/7
Przesyłka będzie u Ciebie za 1-2 dni
12.30 ZŁ
Płatność przy odbiorze (pobranie):
GLS kurier
Przesyłka będzie u Ciebie za 1-2 dni
23.00 ZŁ
Rate the product
Your rating