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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:
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Detailed specification - 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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Pros as well as cons of Nd2Fe14B magnets.
Advantages
- They have unchanged lifting capacity, and over more than 10 years their performance decreases symbolically – ~1% (in testing),
- They feature excellent resistance to magnetic field loss due to opposing magnetic fields,
- The use of an aesthetic finish of noble metals (nickel, gold, silver) causes the element to present itself better,
- The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
- Possibility of exact forming as well as optimizing to precise requirements,
- Significant place in modern technologies – they are commonly used in magnetic memories, motor assemblies, advanced medical instruments, as well as technologically advanced constructions.
- Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,
Disadvantages
- They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
- Neodymium magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape and 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
- When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation as well as corrosion.
- Due to limitations in creating threads and complex shapes in magnets, we propose using a housing - magnetic holder.
- Health risk resulting from small fragments of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child health protection. It is also worth noting that small components of these magnets can disrupt the diagnostic process medical when they are in the body.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities
Pull force analysis
Magnetic strength at its maximum – what contributes to it?
- on a block made of mild steel, perfectly concentrating the magnetic field
- with a thickness minimum 10 mm
- characterized by lack of roughness
- with zero gap (without coatings)
- during detachment in a direction vertical to the mounting surface
- in temp. approx. 20°C
Practical lifting capacity: influencing factors
- Distance – existence of foreign body (paint, dirt, air) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
- Force direction – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet exhibits much less (often approx. 20-30% of maximum force).
- Element thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
- Plate material – mild steel attracts best. Alloy steels decrease magnetic permeability and lifting capacity.
- Plate texture – smooth surfaces guarantee perfect abutment, which improves force. Uneven metal reduce efficiency.
- Thermal factor – high temperature reduces pulling force. Too high temperature can permanently demagnetize the magnet.
Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the load capacity is reduced by as much as fivefold. Additionally, even a slight gap between the magnet and the plate reduces the load capacity.
Safety rules for work with NdFeB magnets
Swallowing risk
Always keep magnets out of reach of children. Ingestion danger is high, and the consequences of magnets clamping inside the body are very dangerous.
Avoid contact if allergic
A percentage of the population suffer from a hypersensitivity to nickel, which is the common plating for NdFeB magnets. Extended handling might lead to dermatitis. We suggest wear protective gloves.
Protective goggles
Despite the nickel coating, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.
Threat to electronics
Powerful magnetic fields can destroy records on payment cards, HDDs, and storage devices. Stay away of at least 10 cm.
Fire warning
Fire hazard: Neodymium dust is highly flammable. Do not process magnets without safety gear as this risks ignition.
Pacemakers
For implant holders: Powerful magnets disrupt electronics. Maintain minimum 30 cm distance or request help to handle the magnets.
Thermal limits
Regular neodymium magnets (grade N) lose magnetization when the temperature surpasses 80°C. The loss of strength is permanent.
Hand protection
Mind your fingers. Two powerful magnets will snap together immediately with a force of massive weight, crushing anything in their path. Exercise extreme caution!
Powerful field
Be careful. Neodymium magnets attract from a long distance and snap with huge force, often faster than you can move away.
Magnetic interference
A strong magnetic field interferes with the functioning of magnetometers in phones and GPS navigation. Do not bring magnets near a device to prevent damaging the sensors.
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
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