![Magnet with screw UMGZ 25x17x8 [M5] GZ / N38](https://cdn3.dhit.pl/graphics/banners/magnet.webp "Magnet with screw UMGZ 25x17x8 [M5] GZ / N38")
![UMGZ 25x17x8 [M5] GZ / N38 - magnetic holder external thread](https://cdn3.dhit.pl/graphics/products/um-25x17x8-m5-gz-keb.jpg)
![UMGZ 25x17x8 [M5] GZ / N38 - magnetic holder external thread - ujęcie 2](https://cdn3.dhit.pl/graphics/products/umgw-25x17x8-m5-gz-bak.jpg)
UMGZ 25x17x8 [M5] GZ / N38 - magnetic holder external thread
magnetic holder external thread
Catalog no 190323
GTIN/EAN: 5906301813828
Diameter Ø
25 mm [±1 mm]
Height
17 mm [±1 mm]
Height
8 mm [±1 mm]
Weight
25 g
Load capacity
17.00 kg / 166.71 N
12.23 ZŁ with VAT / pcs + price for transport
9.94 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Call us
+48 888 99 98 98
if you prefer contact us via
inquiry form
the contact page.
Specifications and appearance of magnetic components can be calculated using our
force calculator.
Orders placed before 14:00 will be shipped the same business day.
Physical properties - UMGZ 25x17x8 [M5] GZ / N38 - magnetic holder external thread
Specification / characteristics - UMGZ 25x17x8 [M5] GZ / N38 - magnetic holder external thread
| properties | values |
|---|---|
| Cat. no. | 190323 |
| GTIN/EAN | 5906301813828 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 25 mm [±1 mm] |
| Height | 17 mm [±1 mm] |
| Height | 8 mm [±1 mm] |
| Weight | 25 g |
| Load capacity ~ ? | 17.00 kg / 166.71 N |
| 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 offers
Strengths as well as weaknesses 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 show high resistance to demagnetization induced by presence of other magnetic fields,
- The use of an metallic layer of noble metals (nickel, gold, silver) causes the element to present itself better,
- Magnetic induction on the surface of the magnet remains very high,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
- Thanks to modularity in constructing and the ability to adapt to individual projects,
- Universal use in modern technologies – they are commonly used in mass storage devices, drive modules, advanced medical instruments, also technologically advanced constructions.
- Thanks to their power density, small magnets offer high operating force, with minimal size,
Weaknesses
- At strong impacts they can break, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
- When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
- Due to limitations in creating threads and complex forms in magnets, we propose using a housing - magnetic mount.
- Potential hazard resulting from small fragments of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child health protection. Additionally, tiny parts of these products can complicate diagnosis medical after entering the body.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities
Pull force analysis
Breakaway strength of the magnet in ideal conditions – what contributes to it?
- using a plate made of high-permeability steel, acting as a ideal flux conductor
- whose transverse dimension reaches at least 10 mm
- with an ideally smooth touching surface
- without any insulating layer between the magnet and steel
- for force acting at a right angle (pull-off, not shear)
- at temperature approx. 20 degrees Celsius
Magnet lifting force in use – key factors
- Clearance – existence of foreign body (paint, dirt, gap) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
- Force direction – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the maximum value.
- Plate thickness – too thin plate does not close the flux, causing part of the power to be escaped to the other side.
- Steel grade – the best choice is high-permeability steel. Stainless steels may have worse magnetic properties.
- Plate texture – ground elements guarantee perfect abutment, which improves force. Rough surfaces reduce efficiency.
- Thermal conditions – NdFeB sinters have a sensitivity to temperature. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).
Lifting capacity was assessed using a polished steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, whereas under attempts to slide the magnet the load capacity is reduced by as much as 75%. Moreover, even a small distance between the magnet and the plate reduces the holding force.
Safety rules for work with NdFeB magnets
Threat to electronics
Very strong magnetic fields can corrupt files on credit cards, hard drives, and other magnetic media. Keep a distance of at least 10 cm.
Life threat
For implant holders: Strong magnetic fields affect medical devices. Maintain at least 30 cm distance or request help to work with the magnets.
Heat sensitivity
Standard neodymium magnets (N-type) lose magnetization when the temperature surpasses 80°C. This process is irreversible.
Shattering risk
NdFeB magnets are sintered ceramics, meaning they are very brittle. Collision of two magnets will cause them cracking into small pieces.
Finger safety
Danger of trauma: The pulling power is so great that it can cause blood blisters, crushing, and even bone fractures. Protective gloves are recommended.
Choking Hazard
Only for adults. Small elements pose a choking risk, causing severe trauma. Keep out of reach of children and animals.
Combustion hazard
Machining of neodymium magnets carries a risk of fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.
Powerful field
Before use, check safety instructions. Uncontrolled attraction can break the magnet or injure your hand. Think ahead.
Magnetic interference
A strong magnetic field negatively affects the functioning of magnetometers in phones and GPS navigation. Maintain magnets near a smartphone to avoid breaking the sensors.
Warning for allergy sufferers
Medical facts indicate that the nickel plating (standard magnet coating) is a potent allergen. If you have an allergy, prevent direct skin contact and opt for encased magnets.
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