← previous
next →
Product available Ships tomorrow CO2 GPSR PPWR REACH

SM 28x150 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130519

Diameter Ø
28 mm [±1 mm]
Height
150 mm [±1 mm]
Weight
702.46 g
Magnetic Flux
~ 8 500 Gauss [±5%]

How we measure these parameters — certificates and measurements

view technical data »

430.00 zł net / pcs

528.90 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

Need more?
Quantity
Net
Gross
price from 1 pcs
430.00 zł
528.90 zł
price from 10 pcs
408.50 zł
502.46 zł
price from 15 pcs
387.00 zł
476.01 zł

Frequently asked questions

Which rod should I choose for fine contamination?
For particles below 0.5 mm — a Ø32 mm rod in grade N52, with surface induction of about 10,000 Gs. A Ø25 rod in grade N42 gives about 6,500 Gs and is chosen for contamination above 1 mm: bolts, washers, pieces of wire.
Which rod pitch should I choose?
The narrow pitch, 40 mm centre to centre, for fine free-flowing fractions — it gives denser coverage of the cross-section. The wide pitch, 50 mm, for granulates and for damp, greasy or sticky materials, where a narrow pitch risks the material bridging above the rods.
Why does efficiency drop after a few weeks of operation?
Almost always because the separator has not been cleaned. The layer of captured particles shields the field, and further particles settle on that layer rather than on the rod surface, where the gradient is far stronger. The magnets themselves do not weaken at that rate.

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.

Order by 14:00 and we’ll ship today!

Technical parameters - SM 28x150 [2xM8] / N52 - magnetic separator

Specification / characteristics - SM 28x150 [2xM8] / N52 - magnetic separator

properties
properties values
Cat. no. 130519
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 28 mm [±1 mm]
Height 150 mm [±1 mm]
Weight 702.46 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 8 500 Gauss [±5%]
Size/Mount Quantity M8x2
Polarity circumferential - 5 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N52

Specification / characteristics SM 28x150 [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 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

Table 1: Rod construction
SM 28x150 [2xM8] / N52

Parameter Value Description / Unit
Diameter (Ø) 28 mm
Total length 150 mm (L)
Active length 114 mm
Section count 4 modules
Dead zone 36 mm (2x 18mm starter)
Weight (est.) ~702 g
Active area 100 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) 22.7 kg (theor.)
Induction (surface) ~8 500 Gauss (Max)
Max T = 80°C. Construction data for M8/M10 thread series.

Chart 2: Field profile (4 sections)

Simulation: 4 magnetic modules (pitch 23 mm).

Chart 3: Temperature performance

Technical and environmental data

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%

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: 130519-2026
Quick Unit Converter

Force (pull)

Field Strength

Simply complete any input, and the converter calculate everything else for you.

View more deals

MPL 50x20x10 / N38 - lamellar magnet
Product available Ships tomorrow

MPL 50x20x10 / N38 - lamellar magnet

43.05 zł brutto / pcs
UMP 97x40 [M8+M10] GW F300 kg / N38 - search holder
Product available Ships tomorrow

UMP 97x40 [M8+M10] GW F300 kg / N38 - search holder

300.00 zł brutto / pcs
SM 25x275 [2xM8] / N42 - magnetic separator
Product available Ships tomorrow

SM 25x275 [2xM8] / N42 - magnetic separator

762.60 zł brutto / pcs
SMZR 25x150 / N52 - magnetic separator with handle
Product available Ships tomorrow

SMZR 25x150 / N52 - magnetic separator with handle

430.50 zł brutto / pcs
This product serves to effectively catch ferromagnetic contaminants from bulk and liquid products. It is commonly used for cleaning flour, sugar, plastic granules, as well as oils and coolants. Thanks to the use of strong neodymium magnets, the rod catches even metallic dust.
The construction relies on a sealed, welded stainless steel housing, polished smooth. The core is a precise magnetic system generating high induction (Gauss). Such construction ensures full resistance to corrosion, water, oils, and acids.
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.
The more Gauss, the smaller and more weakly magnetic particles will be effectively caught. For basic machine protection against pieces of iron, standard power is sufficient. High Power versions (~12000-14000 Gs) are necessary for catching metallic dust, oxides, and stainless steel after processing.
We can produce a rod of non-standard length with any mounting termination. The rod end is strictly adapted to the fastening system in your device. We ensure fast realization of special orders and technical advice.

Strengths as well as weaknesses of rare earth magnets.

Pros

Besides their remarkable field intensity, neodymium magnets offer the following advantages:
  • They do not lose power, even during nearly 10 years – the decrease in lifting capacity is only ~1% (theoretically),
  • Neodymium magnets remain exceptionally resistant to magnetic field loss caused by magnetic disturbances,
  • A magnet with a shiny gold surface is more attractive,
  • Neodymium magnets generate maximum magnetic induction on a their surface, which ensures high operational effectiveness,
  • Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
  • Due to the ability of free forming and customization to custom projects, neodymium magnets can be modeled in a variety of forms and dimensions, which increases their versatility,
  • Versatile presence in modern industrial fields – they are commonly used in HDD drives, electromotive mechanisms, medical devices, as well as multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which allows their use in miniature devices

Disadvantages

What to avoid - cons of neodymium magnets and ways of using them
  • To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (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 while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • Limited ability of creating threads in the magnet and complicated shapes - preferred is a housing - mounting mechanism.
  • Health risk related to microscopic parts of magnets are risky, in case of ingestion, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small elements of these magnets are able to complicate diagnosis medical after entering the body.
  • Due to expensive raw materials, their price is higher than average,

Pull force analysis

Maximum holding power of the magnet – what affects it?

Information about lifting capacity is the result of a measurement for the most favorable conditions, assuming:
  • on a block made of structural steel, effectively closing the magnetic field
  • whose thickness is min. 10 mm
  • with an ideally smooth contact surface
  • without the slightest air gap between the magnet and steel
  • under perpendicular force vector (90-degree angle)
  • at ambient temperature room level

Practical lifting capacity: influencing factors

Real force impacted by specific conditions, mainly (from most important):
  • Clearance – existence of any layer (paint, tape, air) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Loading method – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet holds much less (often approx. 20-30% of maximum force).
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Chemical composition of the base – mild steel gives the best results. Alloy admixtures decrease magnetic permeability and lifting capacity.
  • Surface condition – ground elements guarantee perfect abutment, which improves force. Uneven metal weaken the grip.
  • Temperature – heating the magnet causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under shearing force the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate decreases the lifting capacity.

Warnings
Fire risk

Dust created during machining of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.

Metal Allergy

Certain individuals experience a hypersensitivity to Ni, which is the common plating for NdFeB magnets. Prolonged contact might lead to dermatitis. We strongly advise wear protective gloves.

Precision electronics

An intense magnetic field negatively affects the functioning of compasses in phones and GPS navigation. Keep magnets close to a device to avoid breaking the sensors.

Product not for children

These products are not intended for children. Swallowing a few magnets may result in them attracting across intestines, which poses a severe health hazard and necessitates immediate surgery.

Permanent damage

Watch the temperature. Heating the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and strength.

Magnetic media

Data protection: Neodymium magnets can damage data carriers and delicate electronics (pacemakers, medical aids, timepieces).

Life threat

Patients with a ICD have to keep an safe separation from magnets. The magnetic field can disrupt the operation of the implant.

Respect the power

Before starting, read the rules. Sudden snapping can destroy the magnet or injure your hand. Be predictive.

Material brittleness

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

Physical harm

Mind your fingers. Two powerful magnets will join instantly with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!

Caution! Learn more about risks in the article: Magnet Safety Guide.