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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

How we measure these parameters — certificates and measurements

product parameters »

80.48 zł net / pcs

98.99 zł with VAT (23% VAT) / pcs

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Frequently asked questions

How much will a magnetic holder hold in practice?
The catalogue value assumes full contact with smooth steel at least 10 mm thick and a perpendicular pull. Thinner sheet, paint, rust and surface irregularities reduce it considerably: on 1 mm sheet about half remains. Lifting and vertical mounting call for an additional safety margin.
Will a holder work on stainless steel?
Not on austenitic grades 304 and 316 — they are effectively non-magnetic. It will not work on aluminium, copper or brass either. Those materials need a mechanical gripper.
Which coating for which conditions?
Nickel-copper-nickel (NiCuNi) is the standard and covers most applications. Epoxy is used for damp environments and outdoor work, zinc is sufficient for dry interiors. Holders in a steel housing or in rubber also protect the magnet against impact.

Guides from the knowledge base

Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Physical properties - 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
Remanence Br ? 14.2-14.7 kGs
Remanence Br ? 1420-1470 mT
Coercivity bHc ? 10.8-12.5 kOe
Coercivity bHc ? 860-995 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 48-53 BH max MGOe
Energy product BHmax ? 380-422 BH max KJ/m
Maximum working 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 310 °C
Curie Temperature TF 590 °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
Technical and environmental data

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%

Ecology and recycling (GPSR)

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
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Thanks to powerful magnetic systems, the strip handles cleavers, hammers, pincers, and large wrenches. 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. We do not recommend mounting with adhesive tape for heavy items as it may peel off.
Storing knives on a magnetic strip is much safer for blades than keeping them loose in a drawer where they bump into each other. The strip provides easy access and excellent visibility of all knives, facilitating cooking. Wooden (bamboo) or plastic versions additionally protect steel from scratches.
We offer strips of various lengths, most often 30 cm, 45 cm, 50 cm, and 60 cm. A 50 cm strip holds a set of 8-10 tools or a large knife set. It is worth measuring available wall space before purchase.
The holder attracts most steel knives, wrenches, screwdrivers, and hammers. If in doubt, apply a regular magnet to the tool - if it grips, the strip will also work. Ideal for organizing screwdrivers, wrenches, scissors, and kitchen accessories.

Pros and cons of rare earth magnets.

Benefits

Apart from their consistent holding force, neodymium magnets have these key benefits:
  • Their power is durable, and after around ten years it decreases only by ~1% (theoretically),
  • They are resistant to demagnetization induced by external field influence,
  • A magnet with a metallic gold surface has an effective appearance,
  • They show high magnetic induction at the operating surface, which affects their effectiveness,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Due to the possibility of free shaping and adaptation to custom projects, magnetic components can be modeled in a broad palette of shapes and sizes, which makes them more universal,
  • Fundamental importance in advanced technology sectors – they are used in hard drives, drive modules, advanced medical instruments, also technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which makes them useful in miniature devices

Disadvantages

What to avoid - cons of neodymium magnets: tips and applications.
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a strong case, which not only secures them against impacts but also raises their durability
  • When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as 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 start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
  • Limited ability of creating threads in the magnet and complicated shapes - recommended is a housing - magnetic holder.
  • Possible danger to health – tiny shards of magnets pose a threat, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, tiny parts of these devices can complicate diagnosis medical after entering the body.
  • With mass production the cost of neodymium magnets is a challenge,

Lifting parameters

Maximum lifting capacity of the magnet – what affects it?

The specified lifting capacity refers to the limit force, recorded under ideal test conditions, meaning:
  • using a plate made of high-permeability steel, functioning as a circuit closing element
  • whose thickness is min. 10 mm
  • with an polished contact surface
  • under conditions of no distance (metal-to-metal)
  • for force acting at a right angle (pull-off, not shear)
  • in neutral thermal conditions

Determinants of lifting force in real conditions

Bear in mind that the magnet holding may be lower depending on the following factors, starting with the most relevant:
  • Distance – the presence of foreign body (paint, tape, gap) interrupts the magnetic circuit, which lowers power steeply (even by 50% at 0.5 mm).
  • Direction of force – maximum parameter is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is standardly many times lower (approx. 1/5 of the lifting capacity).
  • Metal thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
  • Material type – ideal substrate is pure iron steel. Hardened steels may generate lower lifting capacity.
  • Smoothness – full contact is obtained only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
  • Thermal factor – hot environment weakens magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity testing was conducted on a smooth plate of suitable thickness, under perpendicular forces, whereas under attempts to slide the magnet the load capacity is reduced by as much as 75%. Additionally, even a slight gap between the magnet and the plate decreases the holding force.

H&S for magnets
Life threat

People with a heart stimulator should keep an safe separation from magnets. The magnetism can stop the functioning of the implant.

Pinching danger

Risk of injury: The attraction force is so immense that it can cause blood blisters, crushing, and even bone fractures. Use thick gloves.

Fire risk

Machining of neodymium magnets poses a fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Protect data

Powerful magnetic fields can corrupt files on credit cards, hard drives, and other magnetic media. Keep a distance of at least 10 cm.

Immense force

Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.

Maximum temperature

Watch the temperature. Exposing the magnet to high heat will ruin its magnetic structure and pulling force.

Eye protection

Neodymium magnets are ceramic materials, which means they are fragile like glass. Clashing of two magnets will cause them breaking into shards.

No play value

Neodymium magnets are not toys. Accidental ingestion of a few magnets can lead to them connecting inside the digestive tract, which poses a direct threat to life and requires immediate surgery.

Skin irritation risks

Medical facts indicate that nickel (standard magnet coating) is a strong allergen. For allergy sufferers, refrain from direct skin contact and opt for encased magnets.

Impact on smartphones

Remember: neodymium magnets generate a field that interferes with precision electronics. Maintain a separation from your mobile, tablet, and navigation systems.

Warning! Looking for details? Check our post: Are neodymium magnets dangerous?