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BM 550x180x70 [4x M8] - magnetic beam

magnetic beam

Catalog no 090221

GTIN/EAN: 5906301812562

5.00

length

550 mm [±1 mm]

Width

180 mm [±1 mm]

Height

70 mm [±1 mm]

Weight

35320 g

technical specifications »

5708.18 ZŁ with VAT / pcs + price for transport

4640.80 ZŁ net + 23% VAT / pcs

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Specifications and form of neodymium magnets can be calculated using our modular calculator.

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Technical - BM 550x180x70 [4x M8] - magnetic beam

Specification / characteristics - BM 550x180x70 [4x M8] - magnetic beam

properties
properties values
Cat. no. 090221
GTIN/EAN 5906301812562
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 550 mm [±1 mm]
Width 180 mm [±1 mm]
Height 70 mm [±1 mm]
Weight 35320 g
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
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%
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: 090221-2026
Magnet Unit Converter
Magnet pull force
Field Strength
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It is a device used to catch unwanted metals from bulk raw materials transported on a belt. It is usually mounted above the conveyor belt (so-called overbelt) or in chutes. The main goal is to protect crushing machines from destruction and ensure product purity.
Ferrite magnets work effectively at a greater distance (high suspension), but with less surface force. We recommend them for protecting machines against large, heavy scrap (so-called tramp iron). Neodymiums are unrivaled in catching fine filings, wires, and small screws. The decision should be made based on the type of separated material and cleanliness requirements.
The construction is tightly welded from acid-resistant sheet, which guarantees tightness. This guarantees hygiene and ease of cleaning, which is crucial in the food industry. The product meets standards for the food industry (HACCP/IFS/BRC).
Removing contaminants is simple but requires periodic stopping of the process or access to the magnet. Scrap is removed by mechanically moving it to the edge, where the magnetic field is weaker. To facilitate, a cleaning overlay (dump drawer) can be used, which we offer as an option.
As a manufacturer, we fulfill individual orders for specific conveyor belt widths. We design separators according to the orderer's requirements, taking into account material specifics. Send us dimensions of your conveyor belt and type of raw material, and we will select the appropriate solution.

Pros as well as cons of neodymium magnets.

Advantages

Besides their tremendous field intensity, neodymium magnets offer the following advantages:
  • They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
  • Magnets effectively protect themselves against demagnetization caused by foreign field sources,
  • By applying a reflective coating of nickel, the element has an modern look,
  • They show high magnetic induction at the operating surface, which affects their effectiveness,
  • Neodymium magnets are characterized by extremely 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...
  • Possibility of accurate machining as well as optimizing to defined requirements,
  • Fundamental importance in future technologies – they are commonly used in data components, electric motors, medical equipment, and other advanced devices.
  • Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Weaknesses

Drawbacks and weaknesses of neodymium magnets: weaknesses and usage proposals
  • To avoid cracks under impact, we recommend using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Limited ability of creating threads in the magnet and complicated forms - recommended is a housing - mounting mechanism.
  • Potential hazard resulting from small fragments of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child safety. It is also worth noting that tiny parts of these magnets can complicate diagnosis medical after entering the body.
  • 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

Maximum lifting force for a neodymium magnet – what contributes to it?

The load parameter shown concerns the peak performance, recorded under optimal environment, meaning:
  • on a base made of mild steel, optimally conducting the magnetic flux
  • whose thickness is min. 10 mm
  • with an polished touching surface
  • with total lack of distance (without impurities)
  • for force applied at a right angle (pull-off, not shear)
  • in stable room temperature

Determinants of practical lifting force of a magnet

Holding efficiency impacted by specific conditions, including (from most important):
  • Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Loading method – declared lifting capacity refers to detachment vertically. When slipping, the magnet exhibits significantly lower power (often approx. 20-30% of maximum force).
  • Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Material type – ideal substrate is pure iron steel. Stainless steels may attract less.
  • Surface condition – smooth surfaces guarantee perfect abutment, which improves force. Rough surfaces weaken the grip.
  • Thermal environment – temperature increase results in weakening of induction. It is worth remembering the thermal limit for a given model.

Lifting capacity testing was performed on a smooth plate of optimal thickness, under perpendicular forces, whereas under shearing force the holding force is lower. In addition, even a minimal clearance between the magnet and the plate decreases the load capacity.

Precautions when working with neodymium magnets
Health Danger

Warning for patients: Powerful magnets disrupt medical devices. Maintain minimum 30 cm distance or request help to work with the magnets.

Mechanical processing

Powder created during cutting of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.

Magnets are brittle

Neodymium magnets are ceramic materials, meaning they are fragile like glass. Clashing of two magnets leads to them cracking into shards.

Sensitization to coating

A percentage of the population experience a sensitization to nickel, which is the common plating for NdFeB magnets. Prolonged contact can result in an allergic reaction. We suggest wear safety gloves.

Operating temperature

Do not overheat. Neodymium magnets are susceptible to heat. If you need resistance above 80°C, look for special high-temperature series (H, SH, UH).

Safe operation

Handle with care. Rare earth magnets attract from a distance and connect with huge force, often faster than you can react.

Do not give to children

Strictly keep magnets away from children. Ingestion danger is significant, and the effects of magnets connecting inside the body are tragic.

Cards and drives

Avoid bringing magnets close to a purse, laptop, or screen. The magnetic field can irreversibly ruin these devices and erase data from cards.

Crushing risk

Pinching hazard: The attraction force is so great that it can cause hematomas, pinching, and even bone fractures. Use thick gloves.

GPS and phone interference

GPS units and mobile phones are extremely susceptible to magnetic fields. Close proximity with a strong magnet can permanently damage the internal compass in your phone.

Warning! More info about risks in the article: Safety of working with magnets.