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SM 32x175 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130353

GTIN/EAN: 5906301813019

Diameter Ø

32 mm [±1 mm]

Height

175 mm [±1 mm]

Weight

940 g

Magnetic Flux

~ 8 000 Gauss [±5%]

528.90 with VAT / pcs + price for transport

430.00 ZŁ net + 23% VAT / pcs

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Technical data - SM 32x175 [2xM8] / N42 - magnetic separator

Specification / characteristics - SM 32x175 [2xM8] / N42 - magnetic separator

properties
properties values
Cat. no. 130353
GTIN/EAN 5906301813019
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 175 mm [±1 mm]
Weight 940 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 8 000 Gauss [±5%]
Size/Mount Quantity 2xM8
Polarity circumferential - 6 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N42

Specification / characteristics SM 32x175 [2xM8] / N42 - magnetic separator
properties values units
remenance Br [min. - max.] ? 12.9-13.2 kGs
remenance Br [min. - max.] ? 1290-1320 mT
coercivity bHc ? 10.8-12.0 kOe
coercivity bHc ? 860-955 kA/m
actual internal force iHc ≥ 12 kOe
actual internal force iHc ≥ 955 kA/m
energy density [min. - max.] ? 40-42 BH max MGOe
energy density [min. - max.] ? 318-334 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 32x175 [2xM8] / N42

Parameter Value Description / Unit
Diameter (Ø) 32 mm
Total length 175 mm (L)
Active length 139 mm
Section count 6 modules
Dead zone 36 mm (2x 18mm starter)
Weight (est.) ~1070 g
Active area 140 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) 26.2 kg (theor.)
Induction (surface) ~8 000 Gauss (Max)

Chart 2: Field profile (6 sections)

Chart 3: Temperature performance

Technical specification and ecology
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%
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: 130353-2026
Measurement Calculator
Magnet pull force

Field Strength

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A magnetic rod is the basic element of building grate separators and magnetic filters. Its task is separation (separation) of metal filings from the transported material. High magnetic induction on the surface allows catching the finest iron particles.
The rod consists of a cover tube made of high-quality acid-resistant steel (AISI 304 or 316). The center is filled with NdFeB magnets and pole pieces, arranged to maximize the field on the tube surface. Such construction ensures full resistance to corrosion, water, oils, and acids.
Due to the high power of the magnet, direct removal of filings can be troublesome and time-consuming. You can use compressed air or special non-magnetic strippers (rings). In industry, cover tubes (so-called Easy Clean system) are used, from which the magnetic insert slides out.
The Gauss value tells us how effectively and deeply the magnet will catch contaminants. Standard rods (~8000 Gs) are sufficient for catching screws, nails, and steel shavings. High Power versions (~12000-14000 Gs) are necessary for catching metallic dust, oxides, and stainless steel after processing.
Yes, as a manufacturer, we make rods of any length and diameter (standard is dia 25mm and 32mm). The rod end is strictly adapted to the fastening system in your device. We ensure fast realization of special orders and technical advice.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Benefits

Besides their remarkable field intensity, neodymium magnets offer the following advantages:
  • They do not lose strength, even during nearly ten years – the reduction in strength is only ~1% (theoretically),
  • They are extremely resistant to demagnetization induced by external magnetic fields,
  • The use of an elegant layer of noble metals (nickel, gold, silver) causes the element to look better,
  • Neodymium magnets ensure maximum magnetic induction on a contact point, which ensures high operational effectiveness,
  • 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 possibility of precise molding and adaptation to specialized needs, magnetic components can be manufactured in a broad palette of forms and dimensions, which amplifies use scope,
  • Fundamental importance in future technologies – they are used in magnetic memories, electric drive systems, precision medical tools, as well as modern systems.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages

Characteristics of disadvantages of neodymium magnets and proposals for their use:
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a special holder, which not only protects them against impacts but also increases their durability
  • When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their strength 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 prevent oxidation and corrosion.
  • Due to limitations in creating threads and complex forms in magnets, we recommend using casing - magnetic mechanism.
  • Health risk resulting from small fragments of magnets pose a threat, if swallowed, which gains importance in the context of child safety. Furthermore, small components of these magnets are able to be problematic in diagnostics medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Maximum lifting force for a neodymium magnet – what it depends on?

Information about lifting capacity was determined for optimal configuration, assuming:
  • using a plate made of mild steel, functioning as a ideal flux conductor
  • possessing a thickness of min. 10 mm to ensure full flux closure
  • with a surface cleaned and smooth
  • under conditions of no distance (surface-to-surface)
  • during detachment in a direction vertical to the plane
  • in temp. approx. 20°C

Determinants of practical lifting force of a magnet

Please note that the working load will differ subject to the following factors, starting with the most relevant:
  • Distance – the presence of any layer (paint, tape, gap) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
  • Force direction – catalog parameter refers to detachment vertically. When attempting to slide, the magnet exhibits much less (often approx. 20-30% of nominal force).
  • Plate thickness – too thin sheet causes magnetic saturation, causing part of the power to be escaped to the other side.
  • Material composition – not every steel reacts the same. High carbon content weaken the attraction effect.
  • Smoothness – full contact is possible only on smooth steel. Rough texture reduce the real contact area, weakening the magnet.
  • Heat – NdFeB sinters have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under a perpendicular pulling force, however under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate decreases the load capacity.

Warnings
Shattering risk

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

Nickel coating and allergies

Allergy Notice: The nickel-copper-nickel coating contains nickel. If redness happens, cease working with magnets and wear gloves.

Crushing risk

Risk of injury: The pulling power is so great that it can cause hematomas, pinching, and broken bones. Protective gloves are recommended.

Protect data

Avoid bringing magnets near a wallet, computer, or screen. The magnetic field can destroy these devices and wipe information from cards.

This is not a toy

Adult use only. Small elements can be swallowed, causing severe trauma. Keep away from kids and pets.

GPS Danger

A powerful magnetic field negatively affects the functioning of compasses in phones and navigation systems. Maintain magnets close to a smartphone to prevent damaging the sensors.

Machining danger

Fire hazard: Rare earth powder is explosive. Avoid machining magnets in home conditions as this may cause fire.

Danger to pacemakers

For implant holders: Strong magnetic fields affect medical devices. Maintain minimum 30 cm distance or request help to work with the magnets.

Heat warning

Regular neodymium magnets (N-type) lose power when the temperature surpasses 80°C. This process is irreversible.

Respect the power

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

Security! Need more info? Check our post: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98