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SM 32x400 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130463

GTIN/EAN: 5906301813347

Diameter Ø
32 mm [±1 mm]
Height
400 mm [±1 mm]
Weight
2215 g
Magnetic Flux
~ 10 000 Gauss [±5%]

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Physical properties - SM 32x400 [2xM8] / N52 - magnetic separator

Specification / characteristics - SM 32x400 [2xM8] / N52 - magnetic separator

properties
properties values
Cat. no. 130463
GTIN/EAN 5906301813347
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Diameter Ø 32 mm [±1 mm]
Height 400 mm [±1 mm]
Weight 2215 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 10 000 Gauss [±5%]
Size/Mount Quantity 2xM8
Polarity circumferential - 15 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N52

Specification / characteristics SM 32x400 [2xM8] / N52 - magnetic separator
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

Table 1: Rod construction
SM 32x400 [2xM8] / N52

Parameter Value Description / Unit
Diameter (Ø) 32 mm
Total length 400 mm (L)
Active length 364 mm
Section count 15 modules
Dead zone 36 mm (2x 18mm starter)
Weight (est.) ~2445 g
Active area 366 cm² (Area)
Housing material AISI 304 1.4301 (Inox)
Surface finish Ra < 0.8 µm Polished
Temp. class 80°C Standard (N)
Force loss (at max °C) -12.8% Reversible loss (physics)
Force (calculated) 41 kg (theor.)
Induction (surface) ~10 000 Gauss (Max)

Chart 2: Field profile (15 sections)

Chart 3: Temperature performance

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%

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: 130463-2026
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Magnet pull force


Magnetic Field

Other products

It is the "heart" of every magnetic filter used in industry for cleaning raw materials. Its task is separation (separation) of metal filings from the transported material. Thanks to the use of strong neodymium magnets, the rod catches even metallic dust.
The outer layer is hygienic acid-resistant steel, approved for food contact. Inside there is a stack of strong neodymium magnets arranged in a special configuration (magnetic circuit). Thanks to this, the rod is durable, hygienic, and easy to keep clean.
Metal filings stick to the surface very strongly, so cleaning requires strength or cleverness. We recommend sticking packing tape to the cluster of filings and tearing it off together with the contaminants. For easier operation, it is worth considering ordering a rod in a version with a cleaning sleeve.
Magnetic induction measured in Gauss (Gs) determines the density of magnetic flux on the rod surface. Standard rods (~8000 Gs) are sufficient for catching screws, nails, and steel shavings. High induction is necessary when contaminants are microscopic or weakly magnetic.
We fulfill individual orders for bars perfectly matched to your machine or separator. You can choose a mounting method consistent with your technical design. We ensure fast realization of special orders and technical advice.

Advantages as well as disadvantages of neodymium magnets.

Benefits

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • They have unchanged lifting capacity, and over nearly 10 years their performance decreases symbolically – ~1% (in testing),
  • They are resistant to demagnetization induced by external field influence,
  • Thanks to the smooth finish, the surface of Ni-Cu-Ni, gold, or silver gives an clean appearance,
  • Magnetic induction on the working layer of the magnet turns out to be extremely intense,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
  • Thanks to freedom in shaping and the ability to modify to specific needs,
  • Wide application in modern industrial fields – they serve a role in hard drives, electric drive systems, medical devices, also other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which makes them useful in miniature devices

Weaknesses

Cons of neodymium magnets: tips and applications.
  • To avoid cracks under impact, we suggest using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening 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
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • We suggest a housing - magnetic holder, due to difficulties in creating nuts inside the magnet and complex shapes.
  • Possible danger related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that small components of these devices are able to be problematic in diagnostics medical in case of swallowing.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Pull force analysis

Maximum holding power of the magnet – what contributes to it?

Breakaway force is the result of a measurement for the most favorable conditions, including:
  • using a plate made of mild steel, functioning as a circuit closing element
  • with a cross-section minimum 10 mm
  • with an polished contact surface
  • with total lack of distance (without paint)
  • during pulling in a direction vertical to the plane
  • at conditions approx. 20°C

What influences lifting capacity in practice

Bear in mind that the magnet holding may be lower subject to elements below, in order of importance:
  • Distance – existence of any layer (paint, dirt, air) interrupts the magnetic circuit, which lowers power steeply (even by 50% at 0.5 mm).
  • Loading method – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet exhibits much less (typically approx. 20-30% of maximum force).
  • Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of generating force.
  • Metal type – different alloys attracts identically. Alloy additives worsen the attraction effect.
  • Smoothness – full contact is possible only on smooth steel. Rough texture create air cushions, reducing force.
  • Heat – neodymium magnets have a sensitivity to temperature. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).

Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, whereas under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the holding force.

Precautions when working with NdFeB magnets
Magnetic interference

A strong magnetic field disrupts the operation of compasses in phones and GPS navigation. Keep magnets near a device to avoid breaking the sensors.

Allergy Warning

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If an allergic reaction occurs, immediately stop working with magnets and wear gloves.

Pacemakers

Individuals with a heart stimulator must maintain an large gap from magnets. The magnetism can interfere with the operation of the implant.

Threat to electronics

Do not bring magnets near a wallet, laptop, or TV. The magnetism can permanently damage these devices and erase data from cards.

Bone fractures

Pinching hazard: The attraction force is so immense that it can cause blood blisters, pinching, and broken bones. Use thick gloves.

Dust explosion hazard

Powder produced during machining of magnets is flammable. Do not drill into magnets unless you are an expert.

Thermal limits

Watch the temperature. Exposing the magnet above 80 degrees Celsius will ruin its properties and strength.

Conscious usage

Before starting, check safety instructions. Sudden snapping can break the magnet or hurt your hand. Think ahead.

Magnet fragility

NdFeB magnets are sintered ceramics, which means they are very brittle. Collision of two magnets leads to them cracking into small pieces.

Keep away from children

Only for adults. Small elements can be swallowed, causing serious injuries. Keep away from kids and pets.

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