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KM HF - 22 kg - magnetic bracket

magnetic bracket

Catalog no 170257

GTIN/EAN: 5906301813699

5.00

Weight

593 g

Load capacity

22.00 kg / 215.75 N

29.52 with VAT / pcs + price for transport

24.00 ZŁ net + 23% VAT / pcs

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Technical specification - KM HF - 22 kg - magnetic bracket

Specification / characteristics - KM HF - 22 kg - magnetic bracket

properties
properties values
Cat. no. 170257
GTIN/EAN 5906301813699
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Weight 593 g
Load capacity ~ ? 22.00 kg / 215.75 N
Manufacturing Tolerance ±1 mm

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
Technical specification and ecology
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%
Sustainability
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: 170257-2025
Measurement Calculator
Force (pull)

Field Strength

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The magnetic square acts like an extra pair of hands, stably holding welded elements in the desired position. Thanks to it, you can freely set elements at an angle and perform tack welding.
Most squares (including this model) allow quick setting of elements at angles of 45°, 90°, and 135°. The housing shape (often with a special notch) allows gripping both flat profiles as well as pipes or shafts.
Ferrite magnets are heavier and larger but handle heat generated during long welding better. Neodymium squares are smaller, lighter, and much stronger, but more sensitive to overheating (usually up to 80°C).
Squares with a switch (ON/OFF) allow easy activation and deactivation of the magnetic field. Lack of filings on the surface guarantees perfect adherence and angle precision on next use. It is a function highly valued by professionals, saving time and nerves.
Holding force depends on the thickness and shape of the welded element and the angle of application. For heavy gates, posts, and long pipes, we recommend the largest squares (34kg and more), often used in pairs.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Pros

Besides their tremendous pulling force, neodymium magnets offer the following advantages:
  • Their magnetic field remains stable, and after around 10 years it decreases only by ~1% (theoretically),
  • Magnets perfectly resist against loss of magnetization caused by foreign field sources,
  • Thanks to the shimmering finish, the surface of nickel, gold-plated, or silver gives an aesthetic appearance,
  • Magnetic induction on the working layer of the magnet is very high,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to modularity in forming and the ability to modify to specific needs,
  • Wide application in modern industrial fields – they serve a role in magnetic memories, motor assemblies, medical equipment, as well as complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which allows their use in small systems

Limitations

Characteristics of disadvantages of neodymium magnets and proposals for their use:
  • Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a steel housing, which not only protects them against impacts but also raises their durability
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop 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 start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
  • Due to limitations in producing nuts and complicated shapes in magnets, we recommend using casing - magnetic mount.
  • Health risk to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child health protection. Additionally, small components of these magnets can complicate diagnosis medical in case of swallowing.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities

Holding force characteristics

Detachment force of the magnet in optimal conditionswhat it depends on?

The force parameter is a result of laboratory testing conducted under standard conditions:
  • on a base made of structural steel, optimally conducting the magnetic field
  • whose transverse dimension equals approx. 10 mm
  • characterized by lack of roughness
  • with total lack of distance (no coatings)
  • under axial force direction (90-degree angle)
  • at temperature room level

Determinants of lifting force in real conditions

Bear in mind that the working load may be lower influenced by elements below, in order of importance:
  • Clearance – existence of any layer (paint, tape, gap) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
  • Loading method – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet exhibits much less (often approx. 20-30% of nominal force).
  • Substrate thickness – for full efficiency, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
  • Plate material – low-carbon steel attracts best. Higher carbon content reduce magnetic permeability and lifting capacity.
  • Plate texture – smooth surfaces ensure maximum contact, which improves force. Uneven metal reduce efficiency.
  • Thermal factor – high temperature reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was conducted on a smooth plate of suitable thickness, under perpendicular forces, whereas under shearing force the load capacity is reduced by as much as fivefold. Moreover, even a small distance between the magnet and the plate reduces the load capacity.

Warnings
Dust is flammable

Fire warning: Rare earth powder is explosive. Do not process magnets without safety gear as this may cause fire.

Safe operation

Handle magnets consciously. Their huge power can shock even professionals. Plan your moves and do not underestimate their force.

Warning for heart patients

People with a heart stimulator must maintain an large gap from magnets. The magnetism can interfere with the functioning of the life-saving device.

Nickel allergy

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If skin irritation occurs, immediately stop handling magnets and wear gloves.

Danger to the youngest

Always keep magnets away from children. Ingestion danger is significant, and the consequences of magnets clamping inside the body are tragic.

GPS Danger

Navigation devices and smartphones are highly susceptible to magnetism. Close proximity with a powerful NdFeB magnet can decalibrate the internal compass in your phone.

Do not overheat magnets

Control the heat. Exposing the magnet to high heat will ruin its properties and strength.

Shattering risk

Despite metallic appearance, neodymium is brittle and cannot withstand shocks. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Threat to electronics

Intense magnetic fields can destroy records on payment cards, hard drives, and other magnetic media. Maintain a gap of min. 10 cm.

Crushing risk

Pinching hazard: The pulling power is so immense that it can result in blood blisters, crushing, and broken bones. Protective gloves are recommended.

Warning! Need more info? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98