UMN 410x44x15 / N52 - knife holder
knife holder
Catalog no 200455
GTIN/EAN: 5906301813897
length
410 mm [±1 mm]
Width
44 mm [±1 mm]
Height
15 mm [±1 mm]
Weight
837 g
Load capacity
5.00 kg / 49.03 N
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Technical data - UMN 410x44x15 / N52 - knife holder
Specification / characteristics - UMN 410x44x15 / N52 - knife holder
| properties | values |
|---|---|
| Cat. no. | 200455 |
| GTIN/EAN | 5906301813897 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 410 mm [±1 mm] |
| Width | 44 mm [±1 mm] |
| Height | 15 mm [±1 mm] |
| Weight | 837 g |
| Load capacity ~ ? | 5.00 kg / 49.03 N |
| Manufacturing Tolerance | ±1 mm |
Magnetic properties of material N52
| properties | values | units |
|---|---|---|
| remenance Br [min. - max.] ? | 14.2-14.7 | kGs |
| remenance Br [min. - max.] ? | 1420-1470 | mT |
| coercivity bHc ? | 10.8-12.5 | kOe |
| coercivity bHc ? | 860-995 | kA/m |
| actual internal force iHc | ≥ 12 | kOe |
| actual internal force iHc | ≥ 955 | kA/m |
| energy density [min. - max.] ? | 48-53 | BH max MGOe |
| energy density [min. - max.] ? | 380-422 | 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 |
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Pros and cons of rare earth magnets.
Advantages
- They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (based on calculations),
- They possess excellent resistance to magnetism drop when exposed to external magnetic sources,
- Thanks to the shimmering finish, the surface of nickel, gold-plated, or silver-plated gives an visually attractive appearance,
- Magnetic induction on the working part of the magnet remains impressive,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Thanks to the potential of flexible molding and adaptation to individualized projects, NdFeB magnets can be modeled in a variety of forms and dimensions, which makes them more universal,
- Universal use in modern technologies – they find application in mass storage devices, electric motors, medical devices, and industrial machines.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which allows their use in compact constructions
Cons
- To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
- Neodymium magnets lose their strength 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 usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
- We suggest cover - magnetic holder, due to difficulties in realizing threads inside the magnet and complicated forms.
- Potential hazard to health – tiny shards of magnets can be dangerous, if swallowed, which becomes key in the context of child safety. Furthermore, small elements of these magnets are able to disrupt the diagnostic process medical after entering 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
Maximum lifting force for a neodymium magnet – what it depends on?
- using a sheet made of low-carbon steel, serving as a magnetic yoke
- possessing a massiveness of min. 10 mm to avoid saturation
- with a surface perfectly flat
- without any insulating layer between the magnet and steel
- under perpendicular force vector (90-degree angle)
- at standard ambient temperature
Practical lifting capacity: influencing factors
- Distance – the presence of foreign body (rust, tape, air) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
- Force direction – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
- Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
- Material composition – different alloys reacts the same. High carbon content worsen the interaction with the magnet.
- Smoothness – full contact is possible only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
- Temperature – heating the magnet results in weakening of induction. Check the maximum operating temperature for a given model.
Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, however under shearing force the load capacity is reduced by as much as 75%. In addition, even a minimal clearance between the magnet and the plate reduces the holding force.
Warnings
Fire warning
Dust generated during cutting of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.
Shattering risk
NdFeB magnets are ceramic materials, which means they are very brittle. Collision of two magnets leads to them cracking into small pieces.
Safe operation
Before use, check safety instructions. Uncontrolled attraction can break the magnet or hurt your hand. Be predictive.
Adults only
Strictly keep magnets away from children. Ingestion danger is significant, and the consequences of magnets connecting inside the body are fatal.
Threat to electronics
Equipment safety: Strong magnets can damage data carriers and delicate electronics (pacemakers, medical aids, mechanical watches).
Nickel coating and allergies
Studies show that nickel (the usual finish) is a strong allergen. For allergy sufferers, refrain from direct skin contact or choose coated magnets.
GPS Danger
Remember: rare earth magnets produce a field that confuses precision electronics. Keep a safe distance from your mobile, tablet, and navigation systems.
Hand protection
Large magnets can break fingers in a fraction of a second. Under no circumstances put your hand between two attracting surfaces.
Implant safety
People with a ICD should keep an large gap from magnets. The magnetism can disrupt the functioning of the implant.
Power loss in heat
Regular neodymium magnets (N-type) lose magnetization when the temperature exceeds 80°C. The loss of strength is permanent.
Tabela kosztu i czasu dostawy
Płatność przed wysyłką:
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14.99 ZŁ
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Płatność przy odbiorze (pobranie):
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Przesyłka będzie u Ciebie za 1-2 dni
23.00 ZŁ
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