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UMN 410x44x15 / N52 - knife holder

knife holder

Catalog no 200455

GTIN/EAN: 5906301813897

5.00
Load capacity 5.00 kg / 49.03 N
length
410 mm [±1 mm]
Width
44 mm [±1 mm]
Height
15 mm [±1 mm]
Weight
837 g
see properties »

98.99 zł with VAT / pcs + price for transport

80.48 zł net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety
Want to talk magnets?

Contact us by phone +48 22 499 98 98 otherwise drop us a message using request form the contact page.
Parameters as well as structure of a neodymium magnet can be checked on our force calculator.

Same-day shipping for orders placed before 14:00.

Technical specification - UMN 410x44x15 / N52 - knife holder

Specification / characteristics - UMN 410x44x15 / N52 - knife holder

properties
properties values
Cat. no. 200455
GTIN/EAN 5906301813897
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
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

Specification / characteristics UMN 410x44x15 / N52 - knife holder
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

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
Engineering data and GPSR

Material specification

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
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 200455-2026
Measurement Calculator

Pulling force

Field Strength

Type data into any field, to see all other values will update on the fly.

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Our strips are equipped with very strong magnets that easily hold heavy objects. Tools are always at hand and don't fall under their own weight.
The strip is screwed to the wall, ensuring maximum stability and safety when removing tools. Installation is simple, intuitive, and takes only a few minutes. For full safety in kitchen and workshop, we always recommend screw mounting.
Unlike a block or drawer, cutting edges do not contact other objects on the strip, preventing dulling. This storage method prevents moisture and bacteria accumulation on blades. Wooden (bamboo) or plastic versions additionally protect steel from scratches.
Length choice depends on the quantity of tools or knives you want to hang. A 30 cm strip fits about 5-6 medium kitchen knives. Match the size to your workshop or kitchen, remembering space reserve.
It will not work with ceramic, aluminum, copper, or plastic knives. Most stainless steels used for knife and wrench production (e.g., martensitic) are magnetic. Ideal for organizing screwdrivers, wrenches, scissors, and kitchen accessories.

Pros and cons of Nd2Fe14B magnets.

Benefits

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • They retain full power for nearly ten years – the drop is just ~1% (based on simulations),
  • Neodymium magnets are distinguished by extremely resistant to loss of magnetic properties caused by external interference,
  • In other words, due to the reflective finish of gold, the element becomes visually attractive,
  • Neodymium magnets deliver maximum magnetic induction on a small surface, which increases force concentration,
  • 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...
  • In view of the ability of precise molding and customization to individualized requirements, neodymium magnets can be produced in a wide range of geometric configurations, which expands the range of possible applications,
  • Significant place in electronics industry – they are utilized in data components, motor assemblies, diagnostic systems, also technologically advanced constructions.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages

Characteristics of disadvantages of neodymium magnets: weaknesses and usage proposals
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a steel housing, which not only protects them against impacts but also increases their durability
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • 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 secure oxidation as well as corrosion.
  • Limited ability of producing threads in the magnet and complicated forms - preferred is casing - magnet mounting.
  • Health risk resulting from small fragments of magnets pose a threat, in case of ingestion, which gains importance in the aspect of protecting the youngest. Additionally, small elements of these magnets can disrupt the diagnostic process medical when they are in the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Maximum magnetic pulling force – what it depends on?

The declared magnet strength concerns the limit force, measured under laboratory conditions, specifically:
  • using a sheet made of high-permeability steel, acting as a ideal flux conductor
  • whose thickness equals approx. 10 mm
  • with a surface cleaned and smooth
  • without the slightest air gap between the magnet and steel
  • for force applied at a right angle (pull-off, not shear)
  • at temperature approx. 20 degrees Celsius

Lifting capacity in real conditions – factors

Please note that the magnet holding may be lower depending on elements below, starting with the most relevant:
  • Gap (betwixt the magnet and the metal), as even a microscopic distance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to varnish, corrosion or debris).
  • Angle of force application – maximum parameter is obtained only during pulling at a 90° angle. The force required to slide of the magnet along the surface is standardly several times smaller (approx. 1/5 of the lifting capacity).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
  • Chemical composition of the base – mild steel attracts best. Alloy steels decrease magnetic properties and holding force.
  • Base smoothness – the smoother and more polished the surface, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
  • Operating temperature – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and in frost they can be stronger (up to a certain limit).

Lifting capacity testing was conducted on a smooth plate of suitable thickness, under perpendicular forces, whereas under shearing force the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet’s surface and the plate reduces the lifting capacity.

Safe handling of NdFeB magnets
Conscious usage

Handle magnets consciously. Their huge power can shock even professionals. Stay alert and respect their power.

Life threat

Warning for patients: Powerful magnets affect medical devices. Maintain minimum 30 cm distance or ask another person to handle the magnets.

Maximum temperature

Watch the temperature. Exposing the magnet above 80 degrees Celsius will destroy its magnetic structure and pulling force.

Machining danger

Dust generated during machining of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.

Risk of cracking

Despite metallic appearance, the material is brittle and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Finger safety

Large magnets can break fingers in a fraction of a second. Never put your hand between two attracting surfaces.

Safe distance

Powerful magnetic fields can destroy records on credit cards, HDDs, and other magnetic media. Maintain a gap of min. 10 cm.

Compass and GPS

GPS units and mobile phones are highly sensitive to magnetic fields. Direct contact with a strong magnet can decalibrate the sensors in your phone.

Choking Hazard

Only for adults. Tiny parts pose a choking risk, leading to serious injuries. Keep out of reach of kids and pets.

Sensitization to coating

Medical facts indicate that the nickel plating (standard magnet coating) is a potent allergen. If you have an allergy, avoid direct skin contact and choose versions in plastic housing.

Caution! Details about hazards in the article: Safety of working with magnets.